Excess bio-sludge and contamination load minimisation: A comparative study on conventional activated sludge (CAS) and integrated treatment of CAS–AnMBR for environmental optimisation

Slaughterhouse wastewater (SWW) contains high levels of biodegradable organic compounds, posing significant environmental hazards. The wastewater often exceeds regulatory discharge limits for contaminants, exacerbating eutrophication. Thus, biological treatment methods like activated sludge and anae...

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Vydáno v:Aqua (London, England) Ročník 74; číslo 1; s. 1 - 17
Hlavní autoři: Hegazy, Mohamed H., Rizk, Ola, Hassan, Aya, Ghoneim, Sherif S. M., Zerouali, Bilel, Ali, Enas, Bailek, Nadjem, Tariq, Aqil, Wong, Yong Jie
Médium: Journal Article
Jazyk:angličtina
Vydáno: 01.01.2025
ISSN:2709-8028, 2709-8036
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Abstract Slaughterhouse wastewater (SWW) contains high levels of biodegradable organic compounds, posing significant environmental hazards. The wastewater often exceeds regulatory discharge limits for contaminants, exacerbating eutrophication. Thus, biological treatment methods like activated sludge and anaerobic digestion remain preferable over physical or chemical processes for handling this wastewater. This study evaluated an integrated conventional activated sludge (CAS) and anaerobic membrane bioreactor (AnMBR) system for SWW to achieve high treatment efficiency while minimising excess sludge production. The wastewater was initially treated by a CAS system operated at a food-to-microorganism ratio of 0.2; the effluent then underwent anaerobic digestion in the AnMBR with an organic loading rate of 0.5 g COD/L/h. The integrated system achieved over 90% removal for COD and suspended solids and over 80% for nitrogen and phosphorus removal. It also reduced excess sludge by 30% compared to standalone CAS. Estimated biogas production was 0.6 m3/h with 50–70% methane content. The high pollution removal, sludge minimisation, and renewable energy generation indicate that the integrated CAS–AnMBR system is a promising sustainable SWW treatment approach. The positive initial results warrant further examinations of methane yields, cost-effectiveness, and optimisation.
AbstractList Slaughterhouse wastewater (SWW) contains high levels of biodegradable organic compounds, posing significant environmental hazards. The wastewater often exceeds regulatory discharge limits for contaminants, exacerbating eutrophication. Thus, biological treatment methods like activated sludge and anaerobic digestion remain preferable over physical or chemical processes for handling this wastewater. This study evaluated an integrated conventional activated sludge (CAS) and anaerobic membrane bioreactor (AnMBR) system for SWW to achieve high treatment efficiency while minimising excess sludge production. The wastewater was initially treated by a CAS system operated at a food-to-microorganism ratio of 0.2; the effluent then underwent anaerobic digestion in the AnMBR with an organic loading rate of 0.5 g COD/L/h. The integrated system achieved over 90% removal for COD and suspended solids and over 80% for nitrogen and phosphorus removal. It also reduced excess sludge by 30% compared to standalone CAS. Estimated biogas production was 0.6 m3/h with 50–70% methane content. The high pollution removal, sludge minimisation, and renewable energy generation indicate that the integrated CAS–AnMBR system is a promising sustainable SWW treatment approach. The positive initial results warrant further examinations of methane yields, cost-effectiveness, and optimisation.
Author Zerouali, Bilel
Hassan, Aya
Bailek, Nadjem
Wong, Yong Jie
Rizk, Ola
Hegazy, Mohamed H.
Ali, Enas
Ghoneim, Sherif S. M.
Tariq, Aqil
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Snippet Slaughterhouse wastewater (SWW) contains high levels of biodegradable organic compounds, posing significant environmental hazards. The wastewater often exceeds...
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Title Excess bio-sludge and contamination load minimisation: A comparative study on conventional activated sludge (CAS) and integrated treatment of CAS–AnMBR for environmental optimisation
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