Wyniki wyszukiwania - BazTech

1

Ocena skuteczności mikrobiologicznej bioremediacji zbiornika Morskie Oko we Wrocławiu

Mazur Robert, Mazur Agata, Wagner Aleksandra, Lewicki Piotr

Przemysł Chemiczny

|

2025

|

T. 104, nr 11

1149--1157

PL

Dokonano oceny skuteczności mikrobiologicznej bioremediacji zbiornika Morskie Oko we Wrocławiu, miejskiego kąpieliska silnie obciążonego rekreacją i ptactwem wodnym. Wstępne badania przeprowadzono w maju 2024 r., po czym zastosowano 5 m³ biopreparatów ACS Aqua Culture i uruchomiono mikroaerację. W maju 2025 r. ponownie oceniono takie parametry fizykochemiczne i biologiczne wód oraz osadów, jak: fosfor i azot ogólny, chlorofil a, rozpuszczony tlen (warstwa powierzchniowa i przydenna), pH, przejrzystość wody i grubość osadów organicznych, ze szczególnym uwzględnieniem eutrofizacji i struktury osadów dennych. Wyniki wykazały poprawę jakości wód: spadek zawartości biogenów i chlorofilu a, wzrost stężenia tlenu przy dnie, większą przejrzystość i zmniejszenie osadów organicznych. Połączenie mikroaeracji z bioremediacją mikrobiologiczną okazało się skuteczne we wspomaganiu samooczyszczania przy presji biologicznej i antropogenicznej.

EN

Microbiol. effectiveness of bioremediation of the Morskie Oko reservoir in Wrocław, Poland, was assessed. The bioremediation included the application of 5 m³ of ACS Aqua Culture microbial preparations and the implementation of microaeration starting in May 2024. In May 2025, phys.-chem. and biol. parameters of water and sediments were reassessed, including total P and N, chlorophyll a, dissolved O (surface and bottom layers), pH, water transparency, and thickness of org. sediments, focusing on eutrophication and sediment structure. The results showed an improved water quality: reduced nutrients and chlorophyll a, increased bottom-layer O, higher transparency, and decreased org. sediments. Combining microaeration with microbial bioremediation proved to be effective in supporting self-purifn. under biol. and anthropogenic pressure.

2

Bioremediacja zbiornika Kępina w Zduńskiej Woli z zastosowaniem biopreparatów allochtonicznych : wyniki i skuteczność w poprawie jakości wód

Jakubiak Mateusz, Mazur Robert, Mazur Agata, Santos Luis

Przemysł Chemiczny

|

2025

|

T. 104, nr 11

1158--1164

PL

Zbiornik Kępina w Zduńskiej Woli (8 ha, głębokość 1,2-2 m, HRT 13-24 h) zmagał się z eutrofizacją, zakwitami sinic i osadami organicznymi. W 2024 r. przeprowadzono bioremediację mikrobiologiczną z użyciem biopreparatów allochtonicznych. Analiza wyników (08.08.2024 - 02.09.2025) wykazała spadek grubości osadów dennych o 36%, wzrost przejrzystości wody o 44,4% oraz zawartości tlenu (przy powierzchni o 17%, przy dnie o 44%). To wynik aktywności mikroorganizmów rozkładających frakcje organiczne, mimo wpływu dopływu z rzeki Pichny. Krótki hydrauliczny czas retencji sugeruje, że zmiany mogą częściowo wynikać z wahań hydrologicznych, jednak dane wskazują na skuteczność bioremediacji. W celu weryfikacji trwałości efektów zaleca się monitorowanie dopływu. Studium potwierdza potencjał metod mikrobiologicznych w rekultywacji zbiorników zdegradowanych.

EN

The Kępina reservoir in Zduńska Wola (8 ha, depth 1.2-2 m, hydraulic retention time 13-24 h) was bioremediated to remove eutrophication and cyanobacterial blooms, and to limit organic sediment accumulation. The microbial. bioremediation was conducted in 2024 by using allochthonous biopreparations. Analysis of results in Sep. 2025 showed a 36% reduction in bottom sediment org. fraction, a 44.4% increase in water transparency, and an increase in oxygen content (surface 17%, bottom 44%). These effects were achieved despite the influence of inflow from the Pichna River. The study confirmed the potential of microbial methods in the reclamation of degraded reservoirs.

3

Bioremediacja Jeziora Zamkowego w Gostyninie : analiza efektywności procesu i ograniczenia zjawisk eutrofizacji

Grübel Klaudiusz, Mazur Robert, Głowienka Ewa, Karwowski Przemysław

Przemysł Chemiczny

|

2025

|

T. 104, nr 11

1141--1148

PL

Analiza dwuletniej bioremediacji mikrobiologicznej Jeziora Zamkowego w Gostyninie (lipiec 2023-lipiec 2025) wykazała jej dużą skuteczność. Przed interwencją jezioro borykało się z zakwitami glonów, dużą miąższością osadów dennych i gnilnym odorem. Badanie miało ocenić wpływ zastosowanych preparatów biologicznych na parametry wody i osady denne. Wyniki pokazały znaczącą poprawę stanu ekologicznego. Grubość osadów dennych zmniejszyła się średnio o 60,33% (cel wynosił 30%). Przejrzystość wody wzrosła o 82,7%. Stężenie tlenu w strefie przydennej wzrosło o 3918%, a w powierzchniowej o 17,80%. Gnilne odory i zakwity glonów praktycznie zanikły. Proces bioremediacji przywrócił równowagę ekosystemową, co potwierdza efektywność mikrobiologicznych metod rekultywacji zdegradowanych zbiorników.

EN

A two-year analysis of the microbiological bioremediation of Lake Zamkowe in Gostynin (07.2023-07.2025) confirmed its high effectiveness. Before the intervention, the lake suffered from algal blooms and putrid odors. The study aimed to assess the impact of biological preparations on water parameters and bottom sediments. The results showed a significant improvement in the ecological state. The thickness of bottom sediments decreased by an average of 60.33% (the goal was 30%). Water clarity increased by 82.7%. The oxygen concentration in the bottom layer rose by 3918%, and in the surface layer by 17.80%. Putrid odors and algal blooms virtually disappeared. The bioremediation process restored the ecosystem's balance, confirming the effectiveness of microbiological methods for reclaiming degraded water bodies.

4

The role of microorganisms isolated from some river waters of Azerbaijan in bioremediation

Hasanova Gulnara, Babashli Aynur, Akhundova Nazilya

Journal of Ecological Engineering

|

2025

|

Vol. 26, nr 4

323--333

EN

The article presents the results of research conducted on water and silt samples taken from river waters located in the southern region of Azerbaijan. Microbiological and physicochemical analyses were performed on the samples, and it was determined that the temperature ranged between 6 and 28 °C, pH between 6.9 and 8.6, and dissolved oxygen between 4.5 and 11.2 mg/L, depending on the season.The number of saprotrophic bacteria in the water samples ranged from 2 to 42 million cells/ml, while in the silt samples, it ranged from 1 to 6 million cells/ml.The highest indicator was observed here, as Lenkeranchay is exposed to excessive anthropogenic impacts throughout the year. Cellulose degrading aerobic bacteria showed 46–236 cells/ml and anaerobic bacteria showed 14–545 cells/ml in 1 ml of water.The micromycetes isolated from the studied river waters represent 2 divisions, 6 classes, 8 orders, 9 families, 12 genera and 33 species. Of these, 28 species of micromycetes belong to the division Ascomycota, while 5 species belong to the division Zygomycota. If we quantify the obtained micromycetes, the division Ascomycota represents 84.8% and the division Zygomycota 15.2%. The role of the identified micromycete strains in the biodegradation of cellulose was determined and it was found that Trichoderma viride and Aspergillus terreus species were more active in the biodegradation process. Cellulose-degrading bacteria and micromycetes were found to completely degrade filter paper and cotton residues within 10-30 days. The results of the research provide important information on the health of river ecosystems and the protection and conservation of water resources.

5

Isolation, biocharacterization, and wastewater treatment potential of purple photosynthetic bacterial strain from Lap An Lagoon, Vietnam

Le Van Tuan, Truong Tung Quy, Dang Thi Thanh-Loc, Ngo Bao-Chau Thi, Hoang Quang Tan, Nguyen Thu-Lien Thi

Journal of Ecological Engineering

|

2025

|

Vol. 26, nr 2

286--296

EN

The growth of the seafood industry, particularly aquaculture, will play a crucial role in enhancing global food security and driving economic growth, especially in nations such as Vietnam, where it is supporting the livelihoods of millions. However, the rapid expansion of aquaculture has brought about environmental issues, notably the discharge of nutrient-rich wastewater. While microbial treatments are well-established in wastewater management, the application of purple photosynthetic bacteria (PPB) in saline aquaculture systems remains underexplored. This study isolated and characterized a novel purple photosynthetic bacterial strain, LA5.1, from Lap An Lagoon in Vietnam. Strain LA5.1 exhibited robust growth across a salinity range of 0 to 30‰ and reduced the chemical oxygen demand (COD) by 60–80% within six days, even when the initial COD concentration was as high as 800 mg/L. Additionally, the strain efficiently removed up to 80% of total ammonia nitrogen (TAN) in saline environments, demonstrating its robust potential in bioremediation. A phylogenetic analysis of the 16S rRNA gene confirmed the identity of the strain as Rhodopseudomonas julia. These findings indicate that R. julia LA5.1 is a promising candidate for sustainable aquaculture wastewater treatment systems, offering significant potential for large-scale applications in addressing the environmental challenges associated with intensive aquaculture practices.

6

Influence of temperature and photoperiod on the growth and development of Lemna trisulca and Lemna minor in controlled conditions

Sender Joanna, Grzywna Antoni

Journal of Ecological Engineering

|

2025

|

Vol. 26, nr 2

56--72

EN

The aim of the study was to analyze the growth and development of two species of duckweed: Lemna minor and Lemna trisulca under different combinations of temperature (15–25 °C) and photoperiod (12–24 hours), while controlling physicochemical parameters such as electrical conductivity, pH, and oxygen content. The plants were placed in synthetic nitrogen medium, and their growth was monitored for 40 days. Statistical methods, including analysis of variance (ANOVA) and principal component analysis (PCA), were used for data analysis. The results showed that both species grow better at higher temperatures (25 °C) and longer photoperiods (24 hours). Lemna minor achieved higher surface coverage up to 58.4% and biomass over 1.44 g fresh weight under optimal conditions (25 °C and a 12-hour photoperiod), indicating its high efficiency in utilizing favourable conditions. Lemna trisulca, on the other hand, showed a more stable increase in biomass (1.03 g fresh weight) and cover 45.8% under its extreme conditions (15 °C and 12-hour photoperiod). Regarding adaptation to changing physicochemical conditions, Lemna minor responded better to favourable parameters, achieving higher growth rates under optimal pH 6.05 and electrical conductivity 31.6 μS/cm, while Lemna trisulca showed stable growth even in more variable conditions, with minimal decrease in growth under higher conductivity (583 μS/cm) and lower pH (6.96). The research findings reveal that Lemna minor is more competitive under optimal conditions, which may result from its more efficient use of available resources. Its rapid growth makes it particularly valuable in bioremediation, while Lemna trisulca may cope better with variable aquatic conditions. The conclusions emphasize the adaptive differences between the two species, which is significant for managing aquatic ecosystems. Lemna minor is suitable for stable environments, whereas Lemna trisulca finds applications in more variable conditions, indicating their diverse potential uses in environmental protection and bioremediation. These studies provide important data on the adaptive capabilities of duckweed, which is essential for effective management of aquatic ecosystems.

7

Numerical Simulation And Multi-Objective Optimization Of Ultra-Low Nitrogen Burners For Ethylene Cracking Furnaces

Hu Guihua, Chen Kunpeng, Chen Mimi

Environment Protection Engineering

|

2025

|

Vol. 51, nr 1

37--63

EN

Coupled numerical simulation and multi-objective optimization for ultra-low nitrogen burners of ethylene cracking furnaces using a fast response surrogate model for combustion are proposed. Firstly, based on simplified reaction mechanisms involving 29 species and 164 reactions, a computational fluid dynamics (CFD)-coupled model for turbulent combustion is established. Secondly, a multi-objective optimization scheme based on a strong generalization-based surrogate model is developed for ultra-low nitrogen burners of ethylene cracking furnaces. The results show that a set of optimal operating parameters for the cracking furnace, i.e., the excess air coefficient of 1.07, the fuel gas flow rate of 0.192 kg/s, and the air preheating temperature of 380 K, is obtained. The optimal NOx emission con-centration decreased from 75.38 mg/m3 of the original scheme to 71.2 mg/m3, i.e., a decrease of 5.55%. The thermal efficiency of the firebox increased from 43.82% of the original scheme to 44.49%, i.e., an increase of 1.53%, which provides theoretical guidance for energy conservation and emission reduction of cracking furnaces.

8

Microcosms as an Implement for Assessing Ecological Processes in Aquatic and Terrestrial Environments. Review

Gregušová Mária, Hybská Helena, Mordáčová Martina

Environment Protection Engineering

|

2025

|

Vol. 51, nr 1

5--19

EN

Currently, microcosms are used for research and assessment of environmental impacts on the environmental components. Microcosms are useful instruments in ecological studies, toxicology, and ecotoxicology. Microcosms allow the experimental study of ecosystems in a controlled medium. This review article is focused on the experiences of the use of aquatic and terrestrial microcosms in practice. The knowledge gained from studies of aquatic microcosms has applications in the removal of micro-plastics, pesticides, antibiotics, and their residues, heavy metals (Hg, Cd, Zn, etc.), the modification of the features of acid mine drainage, and the wastewater treatment. Terrestrial microcosms are suitable for the adaptation of the microbial community to pollution and acidification. The studies have identified potential microorganisms for remediation of the polluted environments and examined the effects of factors such as light, temperature, and redox conditions on the removal and transformation of the pollutants in soil. The effects of biofilm bacteria on bioremediation of pesticides and polycyclic aromatic hydrocarbons were also examined. These studies provide valuable insights into the relationships among organisms, processes, and the environment, and can contribute to a better understanding of environ-mental risks and bioremediation opportunities in different ecosystems.

9

A Brief Overview of Antibiotic Contamination Sources in Wastewater and Elimination Approaches

Mumtaj Zeba Ali, Khan Abdul Rahman, Ansari Jamal Akhtar, Asiri Abdullah, Khan Saimah

Rocznik Ochrona Środowiska

|

2024

|

Tom 26

201--216

EN

Antibiotic contamination of natural resources and the receiving environment is of great concern. This brief discussion consists of the sources regarding antibiotic contamination and the analysis of several viable methods of removing antibiotic substances. The sources include domestic discharges, agricultural runoff, and pharmaceutical manufacturing effluents. Antibiotics are classified as emerging contaminants attributed to their persistence in the environment. Antibiotics and their metabolites enter the environment through human and animal urine and faeces. Persistent pollutants are introduced to aquatic ecosystems as they pass the wastewater treatment process. The overuse of antibiotics has led to the emergence of bacteria and genes resistant to antibiotics in the environment. This study provides a descriptive overview of antibiotic sources in the environment, their harmful effects, analytical techniques for its detection in wastewater, related challenges in monitoring antibiotic contamination in water, and recently used techniques for its removal from wastewater and problems associated with current strategies. The study also underscores the importance of understanding the sources and learning how to successfully apply methods to minimise the effects of antibiotic contamination in wastewater.

10

Planowanie badań środowiskowych w kontekście doboru technologii remediacji

Iwanicka Ewa, Grzybowska Weronika, Biliniak Marcin, Konopka Karolina, Golba Artur, Wysocki Krystian, Gubała Kamil

Przegląd Geologiczny

|

2024

|

Vol. 72, nr 12-2

846--849

EN

Modern challenges related to environmental pollution require precise planning of environmental investigation, which form the foundation for selecting appropriate remediation technologies. This article discusses the key stages of planning environmental investigation, modern research technologies, and the importance of an integrated approach in the process of selecting remediation technologies, including their application in various contamination contexts. The planning of environmental investigation is a crucial element in the remediation technology planning process. Precisely defining research objectives, selecting appropriate research methods, obtaining representative samples, and conducting thorough analysis are fundamental to effective environmental pollution management. The efficient combination of these actions allows for the selection of the most appropriate remediation technologies, contributing to the improve¬ment of environmental conditions. Analyzing the rationale and necessity of these studies, it becomes clear that they are highly desirable. Properly conducted environmental studies not only meet regulatory requirements but also provide critical information necessary for the effective management of the remediation process. Without accurate data on the type, extent, and location of contaminants, as well as the effectiveness of the remediation methods applied, it would be impossible to achieve satisfactory environmental outcomes. Thus, these studies constitute the most important baseline data, which, when used correctly, are a valuable source of information about the accuracy of the remediation process. They allow for the selection of appropriate parameters used during the process, help to model and influence the correctness of the adopted assumptions, and should be considered an essential requirement for achieving the intended effect.

11

Wpływ mieszaniny biosurfaktantów na efektywność bioremediacji gruntu zanieczyszczonego węglowodorami ropopochodnymi

Wojtowicz Katarzyna, Steliga Teresa

Nafta-Gaz

|

2024

|

R. 80, nr 5

269--278

PL

W artykule przedstawiono zagadnienia związane z wykorzystaniem biosurfaktantów (związki powierzchniowo czynne pochodzenia naturalnego) w procesie bioremediacji gleb skażonych węglowodorami ropopochodnymi. Badania bioremediacji gleby zanieczyszczonej TPH (suma węglowodorów ropopochodnych) i WWA (wielopierścieniowe węglowodory aromatyczne) prowadzono metodą pryzmowania ex situ (skala półtechniczna) w dwóch układach badawczych (układ 1 – badania biodegradacji węglowodorów ropopochodnych na drodze inokulacji biopreparatem, układ 2 – badania biodegradacji węglowodorów ropopochodnych w glebach na drodze inokulacji biopreparatem zawierającym domieszkę biosurfaktantów). Wykorzystany w badaniach biopreparat opracowano na bazie autochtonicznych bakterii i grzybów, zdolnych do rozkładu węglowodorów ropopochodnych, natomiast roztwór biosurfaktantów składał się z mieszaniny ƴ-PGA (kwasu ƴ-poliglutaminowego), ramnolipidów i surfaktyny. Badania bioremediacji prowadzono przez okres 6 miesięcy, monitorując zmiany stężenia TPH i WWA w glebie oraz jej toksyczność co 2 miesiące. W wyniku sześciomiesięcznego procesu oczyszczania uzyskano obniżenie stężenia TPH z 6062,59 mg/kg s.m. do 1774,72 mg/kg s.m. (w układzie 1) i do 768,92 mg/kg s.m. (w układzie 2) oraz WWA z 12,05 mg/kg s.m. do 4,27 mg/kg s.m. (w układzie 1) i do 2,20 mg/kg s.m. (w układzie 2). Zastosowanie domieszki biosurfaktantów w biopreparacie pozwoliło na zwiększenie efektywności biodegradacji TPH o 16,59% oraz WWA o 17,17%. Przeprowadzone analizy toksykologiczne z wykorzystaniem testów Phytotoxkit™, Ostracodtoxkit™ oraz Microtox®STP wykazały poprawę jakości gleby w wyniku prowadzonej bioremediacji oraz potwierdziły, że wraz ze spadkiem stężenia węglowodorów ropopochodnych maleje negatywny wpływ gleby poddanej biooczyszczaniu na organizmy testowe. Badania prowadzone w dwóch układach pozwoliły na ocenę wpływu biosurfaktantu na efektywność procesu bioremediacji gleby zanieczyszczonej TPH i WWA oraz umożliwiły udoskonalenie stosowanych metod rekultywacji gruntów skażonych ropą naftową.

EN

The article presents issues related to the use of biosurfactants (surfactants of natural origin) in the bioremediation of soils contaminated with petroleum hydrocarbons. Bioremediation studies were carried out on soil contaminated with TPH (total petroleum hydrocarbons) and PAHs (polycyclic aromatic hydrocarbons) using the ex-situ pile method (semi-technical scale) in two test systems (system 1 – biodegradation of petroleum hydrocarbons by inoculation with a biopreparation, system 2 – biodegradation of petroleum hydrocarbons by inoculation with a biopreparation containing an admixture of biosurfactants). The biopreparation used in the study was developed on the basis of indigenous bacteria and fungi capable of decomposing petroleum hydrocarbons, while the biosurfactant solution consisted of a mixture of ƴ-PGA, rhamnolipids, and surfactin. Bioremediation studies were carried out over a period of 6 months, with changes in TPH and PAH concentrations in the soil and its toxicity being monitored every 2 months. As a result of the six-month purification process, the TPH concentration was reduced from 6062.59 mg/kg dry matter (d.m.) to 1774.72 mg/kg d.m. (in system 1) and to 768.92 mg/kg d.m. (in system 2), while PAHs from 12.05 mg/kg d.m. to 4.27 mg/kg d.m. (in system 1) and to 2.20 mg/kg d.m. (in system 2). The addition of biosurfactants to the inoculant allowed to increase the biodegradation effectiveness of TPH by 16.59% and PAH by 17.17% compared to inoculation with the biopreparation alone. Toxicological analyzes carried out using the PhytotoxkitTM, OstracodtoxkitTM and Microtox®STP tests showed an improvement in soil quality as a result of the bioremediation and confirmed that a reduction in the petroleum hydrocarbons concentration decreased the negative impact of the biotreated soil on the test organisms. Research conducted in the two systems allowed for the assessment of the impact of the biosurfactants on the effectiveness of bioremediation process of soil contaminated with TPH and PAHs and enabled improvement of methods used for the reclamation of crude oil-contaminated soil.

12

Microbiological treatment of post-industrial water : Example of efficient bioremediation of the heavily polluted Kalina pond, Poland

Starzec Katarzyna, Stańkowska Emilia, Supel Paulina, Mazur Robert, Surma Piotr, Kaszycki Paweł

Journal of Water and Land Development

|

2024

|

no. 60

236--245

EN

The Kalina pond has been well known as a severely degraded area in the Silesia region, Poland. The environmental deterioration results from high contamination of water and bottom sediments with recalcitrant and toxic organic compounds, mainly phenol. The study was aimed at developing a bioremediation-based approach suitable for this type of polluted areas, involving microbiological treatment of water as a key and integral part of other necessary actions: mechanical interventions and the use of physical methods. During the initial biological treatment stage, autochthonous microorganisms were isolated from contaminated samples of water, soil and sediment, then subjected to strong selective pressure by incubation with the pollutants, and finally, cultivated to form a specialised microbial consortium consisting of five extremophilic bacterial strains. Consortium propagation and its biodegradation activity were optimised under variant conditions enabling bacteria to proliferate and to obtain high biomass density at large volumes allowing for the in situ application. After installing aeration systems in the pond, the consortium was surface-sprinkled to launch bioremediation and then both bacterial frequency and the contaminant level was systematically monitored. The complex remediation strategy proved efficient and was implemented on an industrial scale enabling successful remedial of the affected site. Treatment with the specifically targeted and adapted microbial consortium allowed for removal of most organic pollutants within a four-month season of 2022: the chemical oxygen demand (COD) value decreased by 72%, polyaromatic hydrocarbon (PAH) level by 97%, while the content of total phenols and other monoaromatic hydrocarbons (BTEX) dropped below the detection thresholds.

13

Identification of Oil Degrading Bacteria from Oil-Contaminated Soil in the Northeastern Part of Jordan

Aladwan Mohammad Mahmoud, Dababneh Basem Fou'ad, Farah Husni Shukri, Abusalah Mai Abdel Haleem

Journal of Ecological Engineering

|

2024

|

Vol. 25, nr 5

306--320

EN

Bioremediation aspects of crude oil-polluted fields can be achieved by isolating and identifying bacterial species from oil-contaminated soil. This allows for the selection of the most active isolates and the enhancement of the effectiveness of other bacteria. This project will be a base to use green technology for clean the oil contaminated soil in Jordan. This study involved the isolation and identification of oil-degrading microbes from soil samples contaminated with oil in the northeastern region of Jordan. The morphological and biochemical tests were used to characterize twenty-five bacterial isolates. Molecular identification of a universal primer 16S rDNA gene was used to identify bacterial isolates. Total petroleum hydrocarbons were analyzed using gas chromatography for soil samples. All soil samples were analyzed for heavy metal contamination (Cu, Cd, Mn, Zn, and Pb). The bacterial growth count (CFU/g) was between 1.06×105 and 2.80×1017. The identified bacterial genera included: Staphylococcus, Citrobacter, Lactobacillus, Alcaligin’s, Pseudomonas, Micrococcus, Serratia, Enterobacter, Bacillus, Salmonella, Mycobacterium, Corynebacterium, and, Microbacterium. The most species showed high growth rates on different types of hydrocarbons such as toluene, naphthalene, and hexane were Lactobacillus casei, Staphylococcus intermedius, Micrococcus luteus, Pseudomonas putida, Mycobacterium phlei, Corynebacterium xerosis. Soil sample M1A contains the highest levels of Fe, Cd , and Pb and Cu,. While M1C contains the highest levels of Fe and Mn. On the other hand, M2A, and M2C have the least levels of Mn and Fe. While M3C has the least level of Zn and Pb. our study conclude the bacterial isolates could be used for in situ and ex situ cleanup of oil-contaminated desert soil in northeastern part of Jordan.

14

Constructed Wetland as a Low-Energy Technique for Wastewater Treatment – Seasonal Impact, Performance and Phytomanagement

Benbouzid Maria, Al-Jadabi Naif, Bensemlali Meryem, El Hajjaji Souad, Labjar Najoua

Journal of Ecological Engineering

|

2024

|

Vol. 25, nr 10

176--188

EN

This work aims to study the seasonal impact on pollutant removal efficiency of constructed wetland (CW) units which treat domestic wastewater in the region of Rabat, Morocco. In this context, four vertical flow-constructed wetlands (VFCWs) were investigated for one year. Each CW unit has a surface area of 1m² and a depth of 60 cm. The difference between the units is the vegetation. The experiments are conducted on a laboratory scale and outdoors, to investigate also the direct effect of the climate. The purpose is to investigate the CWs performances with two different plant species (Phragmites Australis and Arundo Donax) and plant arrangements (mono-culture and poly-cultures). Since the region of Rabat has a semi-arid climate, plants behave during seasonal changes was explored. The elimination of organic matters showed a seasonal variation in the CW systems, with higher rates during the hot season and lower rates during the cold ones. Planted systems outperformed the unplanted system and the polyculture system was the most effective, reaching removal rates of 99.47%, 99.58%, and 85.64%, for, COD, BOD5, and TSS in the summer season where the temperature reaches its maximum promoting plant growth as well as microbial activity. Anyhow, results showed that the VFCWs used in this study are a successful technology for the region that is cost-effective and requires low energy.

15

Bioaugmentation and Biostimulation-Enhanced Bioremediation of Hydrocarbon-Contaminated Soil Evaluation of the Effect of Soil Washing Pre-Treatment and Bacterial Communities

Tangahu Bieby Voijant, Purnomo Adi Setyo, Warmadewanthi IDAA, Luqman Arif, Alami Nur Hidayatul, Hamzah Afan, Putra Ary Bachtiar Krishna, Suari Putu Primantari Vikana, Arliyani Isni

Journal of Ecological Engineering

|

2024

|

Vol. 25, nr 12

269--286

EN

Fuel, a petroleum derivative, contributes to soil pollution because of its hydrocarbons, which are difficult to decompose. Bioremediation can assist by introducing microbes that are capable of degrading hydrocarbons and enhancing this process by adding nutrients. This study validated previous research by adding the most optimum nutrients, bacteria with the right ratio, and pre-treatment of soil washing on the degradation value of hydrocarbons in crude oil-contaminated soil. Pre-treatment involved washing the soil with surfactant tween-80, determining the type of mixed bacterial culture variables, adding varying concentrations of inoculum and inorganic nutrients, and determining the optimal total petroleum hydrocarbon (TPH) reduction. The study found that the provision of nutrients, bacteria, and pre-treatment in soil washing had no significant effect on the original soil TPH.

16

Reductive removal of triclosan by Sn-bearing materials and cathode powder recovered from spent Liion batteries

Oh Seok-Young, Kim Do-Gyeom, Cha Soo-Won

Environment Protection Engineering

|

2024

|

Vol. 50, nr 4

101--113

EN

Tin (Sn)-bearing materials, tin oxide (SnO) and elemental tin (Sn(0)), and cathode powder recovered from spent Liion batteries were examined as reductants to transform triclosan, a common antibiotic through batch experiments. The reductive removal of triclosan was rapidly observed within 1 h under the given conditions, however, the formation of a passivation layer, mainly composed of SnO2. Tin dioxide inhibited the reduction reactions on the surfaces of SnO and Sn(0). In contrast, dissolved Sn2+, formed by the addition of SnCl2, could rapidly reduce triclosan within 5 h, resulting in over 95% removal. The results supported the notion that the inhibition of Sn2+formation by SnO2 on the surface acted as a ratelimiting step in the reductive removal of triclosan by Sn(0) and SnO. Conversely, the removal of triclosan by cathode powder was due to sorption and reduction, and its efficacy was limited by increased pH. A synergistic combination of Snbearing materials and cathode powder significantly improved the reduction of triclosan. Our findings suggest that the application of cathode Sn(0)/SnO/cathode powder with SnCl2 holds promise as an effective approach for the reductive transformation of triclosan in engineered systems.

17

Adsorption and photocatalytic properties of toluene and Rhodamine B over TiO2-ZSM-5/ceramic fiber composite

Sun Pengfei, Zhang Wenrui, Zhang Yaqing, Dong Bingjun, Lei Yongchao, Zeng Dongjuan, Xin Zhenghao, Zhang Shengjia, Liang Peng

Environment Protection Engineering

|

2024

|

Vol. 50, nr 4

147--161

EN

TiO2-ZSM-5/ceramic fiber composite was successfully prepared for the first time by impregnation and applied to remove toluene in the atmosphere and RhB in wastewater. Optional values for TiO2loading and calcination temperature were discussed. The composites were characterized by XRD, SEM, TEM, UV-vis and N2 adsorption-desorption. The results showed that TiO2loading amount affects the crystal formation, distribution, pore size and adsorption capacity for pollutants, which in turn determines the adsorption performance and photocatalytic activity of the composite. Composites calcined at 550 ℃ with 12.7 wt. % TiO2loading can degrade toluene and RhB most effectively, with the maximum degradation rates of 39.99% and 92.70%, respectively. In addition, materials have been proven to have high degradation stability being recycled 4 times. The TiO2-ZSM-5/ceramic fiber prepared in this study can degrade atmospheric and industrial wastewater pollutants. Therefore, TiO2-ZSM-5/ceramic fiber has high comprehensive practical value in the field of environmental pollutant removal.

18

Influence of Organic Waste on Bioremediation of Oil-Contaminated Soil

Marwa Alexander

Ecological Engineering & Environmental Technology

|

2024

|

Vol. 25, iss. 5

32--41

EN

As the transportation sector develops and urbanization increases, so does the demand for automobiles and workshop or garage services. During maintenance or workshop activities, oil may be discharged into the environment, leading to oil-contaminated soil. This study focused on optimizing the use of local organic waste to improve the bioremediation of oil-contaminated soil. The concentration of oil-contaminated soil was mixed with various organic wastes (cow manure, chicken droppings, and sewage sludge) in different ratios of organic waste (R1 100 g, R2 200 g, R3 300 g) combined with 1000 g of soil for a 56-day bioremediation trial. The results showed that the oil-contaminated soil in the case study area varied from 96.07 mg·kg-1 to 123.11 mg·kg-1. Organic wastes used contained higher levels of organic carbon, nitrogen, and phosphorus compared to the oil-contaminated soil. After 56 days, the treated soil exhibited a reduction of oil contamination by 66.9% with cow manure (CM), 61.6% with sewer sludge (SS), and 79.2% with chicken droppings (CD). The soil mixed with CD had the highest bacterial count (35·106 CFU·g-1), while the soil mixed with SS had the lowest bacterial count (22·106 CFU·g-1). Optimal bacterial counts were observed over the 35-day experiment, followed by a decrease in bacterial counts in all reactors. This study demonstrated that the promising technology of utilizing local organic waste has the potential to enhance bioremediation in oil-contaminated soil.

19

Evaluation of Biosurfactant Production Capabilities in Bacterial Strains Isolated from Oil-Contaminated Soil

Mahdi Abdulwahhab Jasim, Al-Kalidy Saad Kadhim Ala Allah, Al Shubaily Iman Ismaeel Jaseem

Ecological Engineering & Environmental Technology

|

2024

|

Vol. 25, iss. 3

9--20

EN

This study aims to investigate the biosurfactant production capabilities of bacterial strains isolated from oil-contaminated soil samples. Employing a comprehensive methodological approach, we collected soil samples from thirty different fuel pumps and conducted an extensive screening of bacterial isolates using various tests such as hemolytic activity, emulsification index, blue agar plate method, and drop collapsing test. The results revealed significant biosurfactant production among certain isolates, specifically highlighting the effectiveness of two particular strains. This paper presents a detailed analysis of these strains, including their optimal growth conditions in terms of pH, temperature, carbon, and nitrogen sources. Our findings indicate a notable potential of these bacterial strains in biosurfactant production, with implications for environmental bioremediation, particularly in oil pollution contexts. The study also sheds light on the limitations encountered and underscores the originality of the research in exploring biosurfactant production in a novel context. This study contributes to the field by offering insights into the effective utilization of microbial strains for biosurfactant synthesis, which is crucial for sustainable and eco-friendly bioremediation practices.

20

Bioremediation of fishery waste using water lettuce (Pistia stratiotes L.)

Al-Rosyid Latifa Mirzatika, Komarayanti Sawitri, Arifin Pramesya Ramadhana, Guritno Wulan

Ecological Chemistry and Engineering. S

|

2024

|

Vol. 31, nr 3

329--338

EN

One of the relatively affordable and safe waste treatment is biological treatment by utilising certain plants as biofilters. The water lettuce (Pistia stratiotes L.) is an aquatic plant that is usually considered a weed by the community. These plants can be used to absorb toxic elements in wastewater. The purpose of this study was to analyse the relationship between Pistia stratiotes L. and the decrease in the organic matter content of fishery processing wastewater. The research method involved varying the effectiveness of the relationship between the bacteria and the water lettuce, the cover rate of the water slide plants and measuring water quality. Water quality measurements include: analysis of BOD5, COD, TSS, pH and temperature. Data analysis with regression and correlation tests using SPSS 28 software. In this study, the density of Pistia stratiotes L. used was 0 %, 25 %, 50 %, 75 % and 100 %. Based on the results, it can be concluded that the effectiveness of the Pistia stratiotes L. in reducing levels of BOD5, COD and TSS is highest at a density of 100 % with the effectiveness values of each 23.7 mg/L, 58.7 mg/L and 2.67 mg/L.