NDLI: Research on accelerating excess sludge hydrolysis by adding lysozyme and removing nitrogen and phosphorous in sludge hydrolysis liquid

Content Provider	IEEE Xplore Digital Library
Author	Chen Zhi-qiang Dou Ke-zhong Wen Qin-xue Xue Lian Zheng Fei
Copyright Year	2011
Description	Author affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE,HIT), China (Chen Zhi-qiang; Dou Ke-zhong; Wen Qin-xue; Xue Lian; Zheng Fei)
Abstract	The experiment adopted a coupled way combining enzyme and alkali to enhanced sludge hydrolysis. Effects of lysozyme dosage and enzyme-catalyzed reaction time on sludge hydrolysis were carried out. Results showed that lysozyme effectively promoted cell lysis, enhanced sludge hydrolysis and dissolved out cell intracellular organic substance. While the optimal dosages of lysozyme (by TS) were 120mg/g, the dissolve organic substance reached maximum quantity under enzyme-catalyzed reaction time 72 hours. The dissolve quantity of SCOD, amylose, albumen and VFAs were 10461.321mg/L, 352.278 mg/L, 1650.275 mg/L and 1455.136mg/L with 120mg/g lysozyme added, increasing 222%, 222%, 215% and 348% accordingly compared with control group with no lysozyme added. The way coupled struvite precipitation process with air stripping could remove $PO^{3−}$ and $NH^{−}-N$ in sludge hydrolysis liquid, which provided good way for utilization low nitrogen and phosphorus concentration sludge hydrolysis liquid. The maximum removal rate of $PO^{3−}$ and $NH^{−}-N$ reached 75.6% and 97.5%.
Starting Page	4326
Ending Page	4330
File Size	364409
Page Count	5
File Format	PDF
ISBN	9781457702891
e-ISBN	9781457702907
DOI	10.1109/ICETCE.2011.5775936
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-04-22
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Excess sludge Carbon dioxide Biochemistry Air stripping Nitrogen Struvite Extracellular Hydrolysis Inorganic orthophosphate Polymers Sludge treatment Water resources Lysozyme
Content Type	Text
Resource Type	Article

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