Acidogenesis is a key step in the anaerobic biotransformation of organic micropollutants

Carneiro, Rodrigo B.; González-Gil, Lorena; Londoño, Yudy Andrea; Zaiat, Marcelo; Carballa, Marta; Lema, Juan M.

doi:10.1016/j.jhazmat.2019.121888

Cited by 49 publications

(20 citation statements)

References 82 publications

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Section: Resultssupporting

confidence: 77%

“…Carneiro et al (2020) could also find a correlation between the molecular structure of the investigated substances and their biodegradation during hydrolysis and acidogenesis steps of anaerobic digestion, supporting the findings of Wijekoon et al (2015). Carneiro et al (2020) observed a low biotransformation of CBZ during hydrolysis and acidogenesis and stated that this might be explained by the presence of the EWG (–CONH 2 ). The low biotransformation of hydrophilic substances, for example, DCF and IBP, and some hydrophobic substances including TCS might also be explained by the presence of EWGs (for DCF: –COOH and –Cl; for IBP: –COOH; and for TCS: –Cl).…”

Section: Resultssupporting

confidence: 77%

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Fate of selected organic micropollutants during anaerobic sludge digestion

Hammer

Palmowski

2021

Water Environment Research

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Organic micropollutants are incompletely removed from wastewater in Water Resource Recovery Facilities using conventional methods and can therefore enter the anaerobic sludge treatment together with primary and secondary sludge. This review compiles literature data on the fate of selected micropollutants (Carbamazepine [CBZ], Diclofenac [DCF], Ibuprofen [IBP], Sulfamethoxazole [SMX], and Triclosan [TCS]) during anaerobic sludge treatment and how the fate is affected by chemical properties, phase distribution and operating conditions. CBZ was found to be persistent to anaerobic degradation in most studies, with some exceptions reporting a degradation efficiency of 60%. Removal efficiencies for DCF, IBP, and TCS varied widely (from no to [very] high removal). For SMX, most studies reported a removal above 80%. A correlation was found between the fate during anaerobic digestion and physicochemical properties (hydrophobicity and molecular structure). Sorption to sludge, affected in some cases by pH changes during digestion, is suggested to reduce bioavailability. IBP and TCS were mainly present in the liquid phase or solid phase, respectively, CBZ and DCF were present in similar proportions in both phases, while statements were contradictory for SMX. Parameters such as temperature and sludge age did not significantly influence the fate of investigated micropollutants during anaerobic digestion. Practitioner points Most studies report no significant removal of CBZ during anaerobic sludge digestion. Removal efficiencies of DCF, IBP, and TCS vary from study to study between no removal and high or very high removal. Considering such heterogeneous removal efficiencies, it is recommended to conduct digestion trials to find out in which range the values will be for a specific sludge. SMX is very highly removed during anaerobic digestion in most studies. Parameters such as temperature and SRT do not significantly influence the fate of the five investigated micropollutants. Hydrophobicity, which has some effect on the liquid/solid phase distribution of micropollutants, and molecular structure influence the removal efficiencies.

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Section: Resultssupporting

confidence: 77%

Section: Resultssupporting

confidence: 77%

Fate of selected organic micropollutants during anaerobic sludge digestion

Hammer

Palmowski

2021

Water Environment Research

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“…Previous studies pointed out that many species of Clostridiaceae have strong hydrolytic ability [ 29 ] and Thermotogae can produce hydrolytic enzymes that catalyze the breaking down of various polysaccharides to acetate, hydrogen, and carbon dioxide [ 30 ]. Fermentation commonly occurs in anaerobic bioreactors, and the key step in the biotransformation of organic micropollutants is acidogenesis [ 31 ]. VFAs are the major intermediate metabolites during anaerobic digestion [ 32 ].…”

Section: Resultsmentioning

confidence: 99%

Elucidate microbial characteristics in a full-scale treatment plant for offshore oil produced wastewater

et al. 2021

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Oil-produced wastewater treatment plants, especially those involving biological treatment processes, harbor rich and diverse microbes. However, knowledge of microbial ecology and microbial interactions determining the efficiency of plants for oil-produced wastewater is limited. Here, we performed 16S rDNA amplicon sequencing to elucidate the microbial composition and potential microbial functions in a full-scale well-worked offshore oil-produced wastewater treatment plant. Results showed that microbes that inhabited the plant were diverse and originated from oil and marine associated environments. The upstream physical and chemical treatments resulted in low microbial diversity. Organic pollutants were digested in the anaerobic baffled reactor (ABR) dominantly through fermentation combined with sulfur compounds respiration. Three aerobic parallel reactors (APRs) harbored different microbial groups that performed similar potential functions, such as hydrocarbon degradation, acidogenesis, photosynthetic assimilation, and nitrogen removal. Microbial characteristics were important to the performance of oil-produced wastewater treatment plants with biological processes.

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“…Anaerobic digestion is commonly found in nature such as in animal digestive system, in swaps and wetlands. Anaerobic digestion is most-commonly practiced throughout the world in many ways, such as the digestion of primary and secondary sewage sludge, upflow of anaerobic sludge blanket reactors, and activated sludge plants [ 26 , 27 , 28 ]. The process consists of four steps: hydrolysis, acidogenesis, acetogenesis, and methanogenesis, which may occur sequentially or simultaneously in a single stage.…”

Section: Food Waste Biorefinerymentioning

confidence: 99%

Food Waste Biorefinery: Pathway towards Circular Bioeconomy

Tsegaye

Jaiswal

2021

Foods

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Food waste biorefineries for the production of biofuels, platform chemicals and other bio-based materials can significantly reduce a huge environmental burden and provide sustainable resources for the production of chemicals and materials. This will significantly contribute to the transition of the linear based economy to a more circular economy. A variety of chemicals, biofuels and materials can be produced from food waste by the integrated biorefinery approach. This enhances the bioeconomy and helps toward the design of more green, ecofriendly, and sustainable methods of material productions that contribute to sustainable development goals. The waste biorefinery is a tool to achieve a value-added product that can provide a better utilization of materials and resources while minimizing and/or eliminating environmental impacts. Recently, food waste biorefineries have gained momentum for the production of biofuels, chemicals, and bio-based materials due to the shifting of regulations and policies towards sustainable development. This review attempts to explore the state of the art of food waste biorefinery and the products associated with it.

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Acidogenesis is a key step in the anaerobic biotransformation of organic micropollutants

Cited by 49 publications

References 82 publications

Fate of selected organic micropollutants during anaerobic sludge digestion

Fate of selected organic micropollutants during anaerobic sludge digestion

Elucidate microbial characteristics in a full-scale treatment plant for offshore oil produced wastewater

Food Waste Biorefinery: Pathway towards Circular Bioeconomy

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