NIUZe-dong,YUANLin-jiang,YANGRui,et al.Relationship between Deammoniumization of Anaerobic Sludge and Sulfate Reduction in UASB[J].China Water & Wastewater,2024,40(1):22-31.
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Relationship between Deammoniumization of Anaerobic Sludge and Sulfate Reduction in UASB

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第40卷 Number: 第1期 Page: 22-31 Column: Date of publication: 2024-01-01
Author(s):
NIU　Ze-dong1; 2; 3;  YUAN　Lin-jiang1; 2; 3;  YANG　Rui1; 2; 3;  ZHU　Miao1; 2; 3;  HE　Xiang-feng1; 2; 3
（1. School of Environmental and Municipal Engineering， Xi’an University of Architecture and Technology， Xi’an 710055， China； 2. Shaanxi Key Laboratory of Environment Engineering， Xi’an 710055， China； 3. Key Laboratory of Northwest Water Resources and Environment Ecology ， Xi’an 710055， China）
Keywords:
UASB;  sulfate reduction;  anaerobic ammonia oxidation;  sulfur autotrophic denitrification
Abstract:
This paper investigated the performance of anaerobic granular sludge for the removal of ammonium and sulfate from inorganic wastewater, and explored the conversion pathway and mechanisms of sulfate reduction and anaerobic deammoniumization in the process of establishing sulfate reduction and anaerobic ammonia oxidation in an upflow anaerobic sludge bed reactor (UASB). NH4+-N and SO42--S were removed in the initial stage of reactor startup, and the average removal rates reached 22.10% and 14.83%, respectively. In the middle stage (after 76 days), the removed NH4+-N increased and the removed SO42--S gradually decreased. In the later stage, the removed NH4+-N reached the maximum of 30.79 mg/L, and almost no SO42--S was removed. In addition to nitrification, both H2O2 and Anammox reaction improved the NH4+-N removal, and the increase of HCO3- concentration was beneficial to NH4+-N conversion. The combined reaction of sulfate reduction, sulfur autotrophic denitrification and aerobic oxidation of sulfur was inferred to take place in the reactor according to the presence of sulfur and mass balance, which constituted a biological sulfur cycle in the reactor, resulting in no change of SO42--S in the effluent. The coupling of the nitrogen-sulfur cycle removed NH4+-N and SO42--S and resulted in the occurrence of sulfate-reducing anaerobic ammonia oxidation phenomenon. The analysis of the bacterial community showed that the abundance of Acinetobacter at the bottom of the reactor reached 78.87%, which played a major role in nitrogen removal, and formed a nitrogen cycle with Anammox and denitrifying bacteria. Meanwhile, a few SRB such as Desulfomonile and Desulfovibrio, sulfur oxidizing bacteria such as Rhodopseudomonas and sulfur autotrophic denitrifying bacteria such as Thiobacillus were detected in the reactor, which together constituted the sulfur cycle in the system.
Last Update: 2024-01-01