TREATMENT OF SULFATE WASTEWATER BY SULFATE-REDUCING BACTERIA WITH RESIDUAL SLUDGE THERMAL ALKALINE-HYDROLYSATE AS CARBON SOURCE

CUI Tiantian; ZHOU Jiti; JIN Ruofei; LI Xin

doi:10.13205/j.hjgc.202402003

Volume 42 Issue 2

Feb. 2024

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CUI Tiantian, ZHOU Jiti, JIN Ruofei, LI Xin. TREATMENT OF SULFATE WASTEWATER BY SULFATE-REDUCING BACTERIA WITH RESIDUAL SLUDGE THERMAL ALKALINE-HYDROLYSATE AS CARBON SOURCE[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(2): 23-31. doi: 10.13205/j.hjgc.202402003

Citation:

CUI Tiantian, ZHOU Jiti, JIN Ruofei, LI Xin. TREATMENT OF SULFATE WASTEWATER BY SULFATE-REDUCING BACTERIA WITH RESIDUAL SLUDGE THERMAL ALKALINE-HYDROLYSATE AS CARBON SOURCE[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(2): 23-31. doi: 10.13205/j.hjgc.202402003

Citation:

CUI Tiantian, ZHOU Jiti, JIN Ruofei, LI Xin. TREATMENT OF SULFATE WASTEWATER BY SULFATE-REDUCING BACTERIA WITH RESIDUAL SLUDGE THERMAL ALKALINE-HYDROLYSATE AS CARBON SOURCE[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(2): 23-31. doi: 10.13205/j.hjgc.202402003

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TREATMENT OF SULFATE WASTEWATER BY SULFATE-REDUCING BACTERIA WITH RESIDUAL SLUDGE THERMAL ALKALINE-HYDROLYSATE AS CARBON SOURCE

doi: 10.13205/j.hjgc.202402003

Key Laboratory of Industrial Ecological and Environmental Engineering of Ministry of Education, Dalian University of Technology, Dalian 116024, China

Received Date: 2023-03-15
Available Online: 2024-04-28

Abstract

Abstract

This study aimed at the problem of insufficient carbon sources during the treatment of sulfate wastewater and explored the feasibility of using the alkaline-thermal hydrolysate of residual sludge as the carbon source of sulfate-reducing bacteria(SRBs). Batch experimental results showed that the optimum sludge pretreatment conditions were T=70 ℃, initial pH=13 and t=10 h, and the optimal parameters for SO₄^2- removal by SRBs were ρ(COD)=10000 mg/L, ρ(SO₄^2-)=2500 mg/L, initial pH=7, and T=35 ℃. Under this condition, the removal efficiency of SO₄^2- reached 90% above, and the utilization efficiency of ρ(COD) reached 80%. The SO₄^2- removal efficiency with sludge alkaline-thermal hydrolase was compared with four other SRBs common carbon sources(sodium lactate, sodium propionate, sodium acetate, and glucose), and the experiment showed that the removal efficiency of SO₄^2- using sludge hydrolysate as SRBs carbon source was higher than other carbon sources. The research confirmed that the residual sludge alkaline-thermal hydrolysate can be used as the carbon source of SRBs, which provided favorable support for the treatment of SO₄^2- wastewater and utilization of residual sludge.
- alkaline-thermal hydrolysate,
- residual sludge,
- SRBs,
- sulfate wastewater,
- supplementary carbon source

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References(44)

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