以FAS+S<sup>0</sup>为底物的生物沥浸对污泥EPS组分和脱水性能的影响

赵炜; 田永静; 夏晶; 孙甜甜; 唐琦雯

doi:10.13205/j.hjgc.202105016

以FAS+S⁰为底物的生物沥浸对污泥EPS组分和脱水性能的影响

doi: 10.13205/j.hjgc.202105016

赵炜¹,
田永静^1,2, ,,
夏晶³,
孙甜甜¹,
唐琦雯¹

1. 苏州科技大学环境科学与工程学院, 江苏苏州 215009;
2. 城市生活污水资源化利用技术国家地方联合工程实验室, 江苏苏州 215009;
3. 悉地(苏州)勘察设计顾问有限公司, 江苏苏州 215009

基金项目:

国家水体污染控制与治理科技重大专项（2017ZX07205-001-03）；污水处理厂提标关键（总氮）对策与研究（ws 03 2020 fw 096）。

详细信息

作者简介:
赵炜(1995-),男,硕士研究生,主要研究方向为污水处理与回用技术。891620106@qq.com

通讯作者:
田永静(1969-),女,副教授,主要研究方向为固体废物污染控制与资源化技术。2434509572@qq.com

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出版历程
- 收稿日期: 2020-08-20
- 网络出版日期: 2022-01-17

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

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

摘要

摘要: 为研究以硫酸亚铁铵（FAS）+硫粉（S⁰）为底物的生物沥浸过程中，污泥的脱水性能及其与胞外聚合物（EPS）中蛋白质（PN）、多糖（PS）的关系，设计了新鲜污泥、新鲜污泥+10%接种物、新鲜污泥+10%接种物+（0，2，4，6 g/L）FAS+（0，2，4，6 g/L）S⁰的3个实验组进行10 d沥浸实验。结果表明：投加量为4g/L FAS+2 g/L S⁰，沥浸时间为6 d时污泥脱水性能最佳，污泥比阻（SRF）和黏度较原始污泥分别下降了83.11%和65.74%。EPS中溶解态PN、PS和结合态PN、PS的含量都随沥浸实验的进行而改变，其中溶解态PS与黏度、SRF呈显著负相关（R分别为-0.813、-0.813，P<0.05），说明溶解态PS的含量是影响污泥脱水性能的主要因素。进一步分析得出，溶解态PS总量随沥浸时间延长而升高，其中疏水性PS的占比随之增加，污泥脱水性相应改善。
- 污泥脱水性能 /
- FAS+S⁰ /
- 蛋白质 /
- 多糖 /
- 亲疏水性
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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