Wyniki wyszukiwania - BazTech

1

Water Quality Monitoring System for Temperature, pH, Turbidity, DO, BOD, and COD Parameters Based on Internet of Things in the Garang Watershed

Syafrudin, Sarminingsih Anik, Juliani Henny, Budihardjo Mochamad Arief, Puspita Annisa Sila, Mirhan Shafa Auliya Arlin

Ecological Engineering & Environmental Technology

|

2024

|

Vol. 25, iss. 2

1--16

EN

Water has recently become a final disposal site for wastewater. Land use has evolved with the global population growth and is generally transformed into settlements and industrial areas. These land use changes could potentially increase wastewater generation from both domestic and non-domestic activities. The Garang watershed, one of the watersheds in Central Java, flows through the Semarang Regency, Kendal Regency, and Semarang City. This study analyzed the water quality conditions in the Garang watershed and designed a real-time water quality monitoring system. The methods used in this study included SWMM modeling, the national sanitation foundation water quality index (NSF-WQI), and the internet of things. Samples were collected from 10 points in the Garang Watershed, with a sampling frequency of five times at each point. The results of the data analysis demonstrated that the differences in land use resulted in varying water parameter levels. The results of the SWMM modeling demonstrated an acceptable model value (NOF between 0 and 1). On the other hand, the WQI analysis results demonstrated that the quality status at the Garang watershed is "medium" at nearly all location points. The designed real-time water quality sensor tool successfully transmitted water quality data online and in real-time, particularly for temperature, pH, turbidity, and DO. This water quality monitoring system offers a variable percentage error value, with the pH sensor ranging between 0.16% and 9.86% and the temperature sensor ranging between 0.64% and 1.72%.

2

The Impact of Food Waste Mitigation with Black Soldier Fly Assistance on Climate Change in Indonesia – A Systematic Review

Octaviani Yeti Nur, Budihardjo Mochamad Arief, Sumiyati Sri

Ecological Engineering & Environmental Technology

|

2024

|

Vol. 25, iss. 1

60--72

EN

Climate changes in the world and Indonesia cannot be separated from human activities. Food waste is an act of throwing away food which can result in climate change due to the high potential for global warming due to this activity. Therefore, there is a need for mitigation in the form of food waste processing, one of which is the black soldier fly (BSF) method. This study aimed to determine the development trend of the impact of food waste in Indonesia on climate change and determine the effect of mitigating food waste processing using the BSF method. The analysis used in this study was bibliometric, and a systematic literature review was applied to 298 published articles. It was found that the publication trend of articles regarding the impact of food waste on climate change in Indonesia is still tiny, namely seven publications. In the impact analysis of mitigating food waste processing using the BSF method was proven to reduce global warming potential by 1,201.58 kg CO2eq and 1,143.4 kg CO2eq. This value compares food waste processing using the BSF and landfilling methods. Results were also obtained from the processing of food waste using only the BSF method for global warming potential values of 0.38 kg CO2eq, 6,687 kg CO2eq, and 3.2 kg CO2eq.

3

Review of Household Waste Management Technology for a Greener Solution to Accomplish Circular Economy in Salatiga, Indonesia

Al Qadar Syahrul, Budihardjo Mochamad Arief, Priyambada Ika Bagus, Puspita Annisa Sila

Ecological Engineering & Environmental Technology

|

2023

|

Vol. 24, iss. 9

1--14

EN

Transitioning to a circular economy as an option of mitigating environmental challenges posed by traditional linear consumption patterns has garnered considerable attention. This study examines innovative approaches to circular economy principles in the context of Salatiga’s domestic waste management. The aim is to conduct a thorough evaluation of various waste management technologies and their potential to contribute to a more sustainable and circular waste management system. The research utilizes a review-based technique, drawing insights from current academic literature, papers, and case studies relevant to circular economy practices and household waste management technologies. To find new methods that have been successfully implemented in a variety of cities, a comprehensive literature search is performed. This research attempts to give a thorough evaluation of these methods relevance to the Salatiga environment by assessing their accomplishments, obstacles, and outcomes. This research showed that several waste management techniques, such as landfilling, incineration, and minimal recycling, are used in Salatiga. The research uncovered a number of novel methods for enacting a circular economy, including community-based recycling programs, waste-to-energy conversion, and expanded producer responsibility efforts. Few people are aware of the issue, there isn’t enough support system in place, and resources are restricted.

4

Metals Removal from Contaminated Soil Using Electrokinetic Treatment – Effect of Different Permeable Reactive Barrier and Flushing Solution

Budihardjo Mochamad Arief, Ramadan Bimastyaji Surya, Safitri Rahayu Puji, Effendi Agus Jatnika, Hidayat Syarif, Paramitadevi Yudith Vega, Ratnawati Beata

Ecological Engineering & Environmental Technology

|

2023

|

Vol. 24, iss. 2

19--27

EN

Metals pollution is often found in the immediate or neighboring areas of industrial or agricultural activities. This situation may significantly affect the environment, such as water, soil, and air pollution. Electrokinetic (EK) treatment is known to have higher efficiency for metals contaminated soil. However, the use of EK treatment is not widely as expected. This study employs EK treatment with different permeable reactive barriers and flushing solutions to remove Cd and Pb from agricultural soil. Soil pH, temperature, water content, electroosmotic flow, electric current, and metal concentration are calculated as responses to the EK treatment. Results showed that the EK treatments were effectively removed the metals from the contaminated soil. On the fifth day of the treatment, EK, which used activated carbon as PRB and citric acid as the chelating agent, removed a significant amount of Cd from the soil. Besides, the treatment using zeolite as PRB and citric agent as chelate can remove more than 90% of Pb after the sixth day of treatment. These results showed that PRB and chelating agents could effectively remove the metals from the contaminated soils.

5

Characteristics of Tofu Wastewater From Different Soybeans and Wastewater at Each Stage of Tofu Production

Hardyanti Nurandani, Susanto Heru, Budihardjo Mochamad Arief, Purwono, Saputra Angga Tri

Ecological Engineering & Environmental Technology

|

2023

|

Vol. 24, iss. 8

54--63

EN

Tofu wastewater is a liquid by-product of the tofu production process that typically contains high levels of organic matter, such as proteins, carbohydrates, and fats, as well as other compounds, such as nitrogen, phosphorus, potassium, and COD. Tofu wastewater COD levels can vary depending on the type of soybeans used in the production process and the stages of the production process. This study aimed to analyze the characteristics of tofu wastewater from various types of soybeans and the characteristics of wastewater at each stage of the production process. The research methods used were field research and laboratory tests. Field research was conducted by collecting samples from different types of soybeans and analyzing them in the laboratory. Meanwhile, laboratory tests were run by analyzing samples for various parameters such as Soybeans Protein, Chemical Oxygen Demand (COD), total suspended solids (TSS), Biochemical Oxygen Demand (BOD), ammonia, and fat oil. The results showed that Wonogiri Soybeans had the highest protein parameter, 19%. As far as the wastewater of seed samples, the Wonogiri Seed sample had the highest parameter results for TSS, COD, ammonia, and BOD, which are 444 mg/L, 4583.33 mg/L; 13.86 mg/L; and 3.481 mg/L, respectively. As for the fat oil parameter, the Red Seed sample achieved the highest result of 6264 mg/L. In the case of the samples from each washing stage, it is known that the washing sample parameter results are lower than the seed samples. The Red 1st Washing sample had the highest TSS, COD, fat oil, and BOD values, amounting to 316 mg/L, 4666.67 mg/L, 356 mg/L, and 2053.71 mg/L, respectively. In comparison, the highest fat oil parameter corresponded to the Wonogiri 1st Washing sample with a value of 11.78 mg/L. The B/C ratio of all samples is > 0.1 and is in the biodegradable zone. Thus, the samples are not only able to be treated through biological processes, but also able to be treated through physical and chemical processes to avoid the length of time for biological decomposition due to the acclimatization process of microorganisms to the samples.

6

Marine and macroplastic litter monitoring and strategic recommendation for reducing pollution: case study from Semarang City

Zaman Badrus, Ramadan Bimastyaji Surya, Sarminingsih Anik, Priyambada Ika Bagus, Budihardjo Mochamad Arief

Archives of Environmental Protection

|

2023

|

Vol. 49, no 4

37--45

EN

Indonesia is one of the largest contributors to global marine litter deposition, given its high population and the largest archipelagic country. The increasing problem of plastic littering has recently attracted the attention of researchers. This study aims to identify marine and macroplastic litter in Semarang City. A field survey was conducted by dividing the beach into 18 sampling grids, each with an area of 1 × 1 m2. A literature survey was also conducted using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) methodology to identify literature that can be used to develop recommendations. The results showed that 6.26–11.16 grams/m2/ day of marine litter and approximately 1.61–4.89 items/m2/day of plastic litter would be deposited on Semarang City beaches. The greatest contributors to macroplastic litter were polypropylene (PP) and low-density polyethylene (LDPE), which should be considered for further intervention. Strategic recommendations were developed based on an in-depth literature survey and best practices in the current field. These also include recommendations that can be used as a reference by policymakers and other stakeholders to reduce marine pollution. The results of this study are expected to provide a multiplier effect on reducing marine pollution for the city.

7

Hydraulic Stability of Fly Ash-Bentonite Mixtures in Landfill Containment System

Budihardjo Mochamad Arief, Syafrudin Syafrudin, Priyambada Ika Bagus, Ramadan Bimastyaji Surya

Journal of Ecological Engineering

|

2021

|

Vol. 22, nr 7

132--141

EN

This study aimed to examine the performance of fly ash mixed materials with bentonite binder (FAB) as a recent low-cost containment system to withstand leachate infiltration. The mixture of fly ash with clay (bentonite) can increase the strength of stability and strengthen cohesion bonds between molecules. Direct shear, falling head, Atterberg limit and specific gravity test have been conducted as a preliminary study to determine the precise mixture composition of fly ash-bentonite (FAB) landfill liners. Some bentonite composition: 0% (FAB0), 15% (FAB15), 20% (FAB20), 25% (FAB25) and 25% – cured with NH4Cl (FAB25s) for 24 hours, which mixed with fly ash, showed the value of shear stability at normal stress reaching 9.5 kNm-2, 15.48 kNm-2, 45.06 kNm-2, 46.26 kNm-2 and 13.67 kNm-2, respectively. It showed that the greater the content of bentonite in the mixture, the higher the shear stress produced. Curing with saline solution can reduce the shear stress of the FAB mixture. The safety test results using Geoslope/W® show that the addition of bentonite will increase bonding between particles, bearing capacity, and shear strength of the material. The largest safety factor of 1.674 obtained from FAB20 material meets the safety standard for short-term slope stability. The use of fly ash material with bentonite is expected to be an alternative landfill liner material.