IMPACT OF BIOLEACHING WITH FAS+S<sup>0</sup> ON EPS AND DEWATERABILITY OF SEWAGE SLUDGE

ZHAO Wei; TIAN Yong-jing; XIA Jing; SUN Tian-tian; TANG Qi-wen

doi:10.13205/j.hjgc.202105016

Volume 39 Issue 5

Jan. 2022

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ZHAO Wei, TIAN Yong-jing, XIA Jing, SUN Tian-tian, TANG Qi-wen. IMPACT OF BIOLEACHING WITH FAS+S0 ON EPS AND DEWATERABILITY OF SEWAGE SLUDGE[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(5): 118-123. doi: 10.13205/j.hjgc.202105016

Citation:

ZHAO Wei, TIAN Yong-jing, XIA Jing, SUN Tian-tian, TANG Qi-wen. IMPACT OF BIOLEACHING WITH FAS+S⁰ ON EPS AND DEWATERABILITY OF SEWAGE SLUDGE[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(5): 118-123. doi: 10.13205/j.hjgc.202105016

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IMPACT OF BIOLEACHING WITH FAS+S⁰ ON EPS AND DEWATERABILITY OF SEWAGE SLUDGE

doi: 10.13205/j.hjgc.202105016

1. School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China;
2. National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, Suzhou University of Science and Technology, Suzhou 215009, China;
3. CCD(Suzhou) Exploration & Design Consultant Co., Ltd, Suzhou 215009, China

Received Date: 2020-08-20
Available Online: 2022-01-17

Abstract

Abstract

To investigate the dewatering performance of sewage sludge and the relationship between dewaterability with protein (PN) and polysaccharide (PS) of extracellular polymers (EPS) in bioleaching process, in which ferrous ammonium sulfate (FAS) and sulfur powder (S⁰) were supplied as substrates, raw sludge was bioleached with 10% inoculum+(0, 2 g/L, 4 g/L, 6 g/L) FAS+(0 g/L, 2 g/L, 4 g/L, 6 g/L) S⁰. Meanwhile, the raw sludge and raw sludge with 10% inoculum were designed as control groups. Results showed that the best bioleaching process condition was 4 g/L FAS+2g/L S⁰ for 6 days, and then SRF and viscosity decreased by 83.11% and 65.74%, respectively. Both dissolved and bound PN and PS content in EPS changed with the bioleaching progress, which influenced the SRF and viscosity of sludge. It was determined that dissolved PS was negatively correlate with SRF and viscosity(R=-0.813、-0.813,P<0.05),suggesting that the content of dissolved PS was the main factor affecting the dewaterability of sludge. Subsequent experiments showed that more hydrophobic PS was produced together with the dissolved PS with the bioleaching progress, contributing to the improvement of dewatering performance of sludge.
- sludge dewatering performance,
- FAS+S⁰,
- protein,
- polysaccharide,
- hydrophilicity and hydrophobicity

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References(26)

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