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Heavy metals and polycyclic aromatic hydrocarbons in leachates from autothermal thermophilic aerobic digestion as a potential threat to the environment in north-eastern Poland

Boruszko Dariusz, Wojciula Ada

Studia Quaternaria

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2022

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Vol. 39, Nr 1

15--22

EN

This paper presents the concentrations of the polycyclic aromatic hydrocarbons (PAH) and heavy metals in leachates from the autothermal thermophilic aerobic digestion (ATAD). The leachates from ATAD installations (Dąbrowa Białostocka, Hajnówka, Pisz, Olecko, Giżycko, Wysokie Mazowieckie) located in Poland were tested. The concentrations of PAHs in samples from Pisz, Giżycko, Wysokie Mazowieckie and Hajnówka were similar to those in industrial wastewater. The cluster analysis confirmed that in sites with a higher polyethylene (p.e.) input from the industrial sector, the leachates were more contaminated with PAH compounds. In samples from Dąbrowa Białostocka, Olecko, Pisz and Hajnówka, the heavy fraction of PAHs compounds prevailed over the light fraction. Concentrations of heavy metals in leachates from ATAD varied. The Ward’s method isolated the wastewater treatment plant in Giżycko. The p.e. from the industrial sector was the highest for this facility. Also, the samples from ATAD had the highest total concentration of heavy metals (5.87 mg/l). The leachates from ATAD are returned to biological systems of municipal sewage treatment plants, where they can be combined into more toxic compounds. Biological wastewater treatment processes do not ensure the removal of PAHs and heavy metals from the wastewater. As a result, harmful compounds can get into the water or ground, polluting the environment.

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Analysis of the Quality of Stabilized Municipal Sewage Sludge

Bartkowska Izabela, Biedka Paweł, Tałałaj Izabela Anna

Journal of Ecological Engineering

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2019

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Vol. 20, nr 2

200--208

EN

The sludge management of many wastewater treatment plants in Poland has not been properly solved yet. The exploiters and designers often have to cope with the dilemma of choosing the method of processing and neutralizing sewage sludge. The method discussed in the article is only one of the options that fully fits in the trends of implementing good practices in the management of sewage sludge. It is a technologically and economically effective as well as environmentally friendly process. It contributes significantly to minimizing the amount of sewage sludge and allows the production of organic fertilizer instead of waste. The work discusses the quality of sewage sludge after autothermal thermophilic stabilization (ATAD). The results of investigations pertaining to the reaction of sludge, dry mass, dry organic matter, content of biogenic substances, calcium and magnesium compounds and heavy metals were analyzed.

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Application of SS-VF Bed for the Treatment of High Concentrated Reject Water from Autothermal Termophilic Aerobic Sewage Sludge Digestion

Dąbrowski W., Malinowski P., Karolinczak B.

Journal of Ecological Engineering

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2018

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Vol. 19, nr 4

103--110

EN

The autothermal termophilic aerobic digestion (ATAD) technology is used in the municipal and industrial wastewater treatment plants (WWTPs) with personal equivalent up to 30.000. The process provides a high level of sewage sludge stabilization and its hygienization. The main operation problems are caused by the high concentration of nitrogen and phosphorus in the reject water from sewage sludge treatment and air purification (odor removal). Reject water usually is returned to the main sewage treatment, which has a negative impact, especially on the sewage treatment systems based on the sequence batch reactors (SBR). Applying high-performance and expensive separate reject water treatment methods such as SHARON, Anammox or CANON in small facilities is not justified economically. The article presents the research results concerning the effectiveness of applying subsurface vertical flow constructed wetlands (SS VF) for reject water treatment from the ATAD process. An innovative type of bed filling was used, which was produced from waste (ash from a heat and power plant). The efficiency of reject water treatment during the research period was on average at 45.6% for ammonia nitrogen, 32.3% for total phosphorus and 85.1% for BOD5. Applying SS VF beds for separate reject water treatment might ensure a stable and effective functioning of municipal WWTPs by decreasing the load of biological part of a WWTP.

4

Ocena modernizacji gospodarki osadowej przykładowej oczyszczalni ścieków

Bartkowska I.

Gaz, Woda i Technika Sanitarna

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2016

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Nr 3

99--105

PL

Tematem artykułu jest modernizacja gospodarki osadowej komunalnej oczyszczalni ścieków. Przedstawiono charakterystykę przedmiotowej oczyszczalni oraz zaprezentowano nowe rozwiązanie, w którym wykorzystano proces autotermicznej termofilnej stabilizacji osadów (ATSO). W artykule przedstawiono wyniki badań osadu ściekowego poddawanego procesowi ATSO, który przebiega w układzie dwustopniowej instalacji. Badaniom poddano osad ustabilizowany, w którym określono zawartość suchej masy, suchej masy organicznej, makroskładników, metali ciężkich. Wykonano także badania mikrobiologiczne osadu. W pracy przedstawiono wnioski, będące wynikiem przeprowadzonych badań i własnych doświadczeń.

EN

The subject of this work is modernization of the sewage treatment plant management of a municipal sewage (wastewater) treatment plant. A new characteristic of the subject wastewater treatment plant was presented where, Autothermal Thermophilic Aerobic Digestion is utilized (ATAD). The article presents results of a study of sludge sediments subjected to Autothermal Thermophilic Aerobic Digestion, which takes place in a two-stage installation. Stabilized sediments were studied for which the content of dry mass, dry organic mass, macro and of heavy metals were determined. Also a microbiological study of the sediment was performed. The article presents conclusions resulting from the performed study and from authors own experience.