KOUXiao-mei,WANGLin-ping,PENGJun,et al.Effects of Adding Iron Powder on Thermophilic Anaerobic Digestion of Sludge with Long Sludge Retention Time[J].China Water & Wastewater,2024,40(5):84-92.
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Effects of Adding Iron Powder on Thermophilic Anaerobic Digestion of Sludge with Long Sludge Retention Time

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第40卷 Number: 第5期 Page: 84-92 Column: Date of publication: 2024-03-01
Author(s):
KOU　Xiao-mei1;  WANG　Lin-ping2;  PENG　Jun2;  WU　Shi-zhang1;  SHAO　Tian1;  WANG　Yi2
（1. PowerChina Northwest Engineering Co. Ltd.， Xi’an 710065， China； 2. School of Environmental and Municipal Engineering， Xi’an University of Architecture and Technology， Xi’an 710055， China）
Keywords:
thermophilic anaerobic digestion;  sludge with long sludge retention time（SRT）;  iron powder;  maximum methanogenic potential
Abstract:
The effects of adding iron powder on thermophilic [（52±1） ℃] anaerobic digestion (TAD) of sludge with long sludge retention time (SRT) was investigated. An appropriate dosage of iron powder could promote the TAD of sludge with long SRT, reduce the accumulation of volatile fatty acids (VFAs), increase the maximum methanogenic potential, boost the methane content in biogas, and reduce the phosphate concentration in the digestate entering into the biological nitrogen removal (BNR) process. When the dosage of iron powder was 10 g/L, the maximum cumulative methane production was 258.80 L/kgVS, the methane content in biogas was 74%, and the phosphate in the digestate was reduced by 58.33%.
Last Update: 2024-03-01