ZOU Yu,ZHANG Guo-quan,XU Xiao-chen,et al.Performance of SNAD-IFAS Process for Sludge Digestion Liquid Treatment[J].China Water & Wastewater,2021,37(13 13):14-20.
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Performance of SNAD-IFAS Process for Sludge Digestion Liquid Treatment

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第37卷 Number: 13 13 Page: 14-20 Column: Date of publication: 2021-07-01
Author(s):
ZOU Yu1; 2; ZHANG Guo-quan2; XU Xiao-chen2; YANG Feng-lin2
(1. China Vanke Co. Ltd., Shenzhen 518000, China; 2. Key Laboratory of Industrial Ecology and Environmental Engineering ＜Ministry of Education＞, School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China)
Keywords:
sludge digestion liquid; integrated fixed-biofilm activated sludge (IFAS) reactor; simultaneous nitrification; ANAMMOX and denitrification (SNAD)
Abstract:
As a by-product of sludge anaerobic treatment process, sludge digestion liquid has the characteristics of low carbon and high nitrogen concentrations, which cannot be effectively removed by traditional biological nitrogen removal technology. Therefore, the treatment performance of simultaneous nitrification, ANAMMOX and denitrification (SNAD) process for simulated sludge digestion liquid in an integrated fixed-biofilm activated sludge (IFAS) reactor was investigated. Under the optimal operational conditions (influent NH4+-N of 400 mg/L and HRT of 18 h), the maximum removal efficiencies of NH4+-N, TN and COD by SNAD-IFAS system were 92.6%, 77.1% and 69.4%, respectively, and the TN removal load was 12.4 mg/(L·h). Specific activity analysis of bacteria showed that nitrification process mainly occurred in the suspended sludge and ANAMMOX and denitrification mainly occurred on the biofilm. Microbial community analysis showed that HRT significantly affected the microbial community.
Last Update: 2021-07-01