Research on enhancing sludge dewatering and filtrate carbon source recovery through typical bioenzymatic conditioning

CHU Zhaorui; ZUO Jianing; XU Kaicheng; GUO Qingsong; HE Junguo

doi:10.13205/j.hjgc.202607024

Volume 44 Issue 7

Jul. 2026

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2026 > 44(7): 242-250

CHU Zhaorui, ZUO Jianing, XU Kaicheng, GUO Qingsong, HE Junguo. Research on enhancing sludge dewatering and filtrate carbon source recovery through typical bioenzymatic conditioning[J]. ENVIRONMENTAL ENGINEERING , 2026, 44(7): 242-250. doi: 10.13205/j.hjgc.202607024

Citation:

CHU Zhaorui, ZUO Jianing, XU Kaicheng, GUO Qingsong, HE Junguo. Research on enhancing sludge dewatering and filtrate carbon source recovery through typical bioenzymatic conditioning[J]. ENVIRONMENTAL ENGINEERING , 2026, 44(7): 242-250. doi: 10.13205/j.hjgc.202607024

Citation:

CHU Zhaorui, ZUO Jianing, XU Kaicheng, GUO Qingsong, HE Junguo. Research on enhancing sludge dewatering and filtrate carbon source recovery through typical bioenzymatic conditioning[J]. ENVIRONMENTAL ENGINEERING , 2026, 44(7): 242-250. doi: 10.13205/j.hjgc.202607024

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Research on enhancing sludge dewatering and filtrate carbon source recovery through typical bioenzymatic conditioning

doi: 10.13205/j.hjgc.202607024

1. School of Civil Engineering and Transportation, Guangzhou University, Guangzhou 510006, China;
2. Guangdong New Source Environmental Technology Co., Ltd., Foshan 528000, China

Received Date: 2026-01-19
Available Online: 2026-09-01

Abstract

Abstract

This study systematically investigated the effects of single and composite conditioning with lysozyme， amylase， and protease on sludge dewatering performance and carbon source recovery in filtrate from the residual sludge of a water treatment plant in Foshan City. The results indicated that lysozyme significantly improved sludge dewatering performance by reducing specific resistance of filtration （SRF）， capillary suction time （CST）， and the water content of the filtered sludge cake （Wc）. While amylase and protease decreased Wc， and elevated SRF and CST，deteriorated sludge filtration properties. Among the combined enzyme treatments， lysozyme and protease exhibited synergistic effects. The asynchronous addition strategy （protease/amylase followed by lysozyme） demonstrated the best performance in reducing Wc， while simultaneous addition was more effective in improving SRF and CST. Mechanistic analysis revealed that all three enzymes reduced sludge particle size. Lysozyme primarily targeted cell lysis and wall disruption， releasing intracellular substances， reducing viscosity， and enhancing sludge hydrophobicity. Meanwhile， amylase and protease mainly disrupted the structure of extracellular polymeric substances （EPS）， leading to the release of large amounts of proteins and polysaccharides into the slime （S）-EPS， thereby increasing viscosity and hydrophilicity. Furthermore， all three enzymes effectively promoted carbon source release， increased the soluble chemical oxygen demand （SCOD） of the filtrate， and transformed recalcitrant humic acid-like organic matters into readily bioavailable tryptophan-like and tyrosine-like substances.
- sludge dewatering,
- sludge conditioning,
- enzyme,
- composite enzyme,
- extracellular polymeric substances

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References(19)

References

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