同帜^1,,
王瑞露^1,2,
曹秉帝²,
张伟军³,
王东升²
1.西安工程大学环境与化学工程学院，西安 710048
2.中国科学院生态环境研究中心环境水质学国家重点实验室，北京 100085
3.中国地质大学武汉环境学院，武汉 430074
基金项目: 国家自然科学基金资助项目（51338010,51678546）

Mechanism of carbon conditioning for improving dewatering performance of activated sludge

TONG Zhi^1,,
WANG Ruilu^1,2,
CAO Bingdi²,
ZHANG Weijun³,
WANG Dongsheng²
1.School of Environmental and Chemical Engineering, Xi#x2019an Polytechnic University, Xi#x2019an 710048, China
2.State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
3.School of Environmental studies，China University of Geosciences, Wuhan 430074 , China

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摘要:活性污泥中的胞外聚合物EPS含黏性蛋白类物质并高度亲水，调控污泥中溶解性EPS和溶解性蛋白类物质是改善污泥脱水的有效途径。通过使用不同炭材料调理污泥的方法来观察污泥脱水性能的变化，深入解析污泥絮体及EPS含量和组分的变化特征。结果表明：炭材料调理污泥可以改善其脱水性，且炭材料吸附容量越大对污泥脱水性改善效果越好；不同炭材料对污泥絮体影响效果不同，经过未改性活性炭（AC-0）、HNO3改性活性炭（AC-1）和石墨调理的污泥絮体粒径变大，经酸碱交替改性活性炭（AC-5）调理的污泥絮体粒径变小；炭材料调理后EPS中蛋白类的荧光峰A、B和腐殖酸、富里酸的荧光峰C、D都得到有效降低，且其对腐殖酸和富里酸的吸附效果比蛋白类物质要好，对低分子质量物质和中分子质量物质的吸附效果要好于对大分子质量物质的吸附效果。
关键词: 污泥/
炭材料/
活性炭改性/
EPS/
脱水性

Abstract:Extracellular polymeric substance （EPS） in activated sludge contains protein-like substances which lead sludge to highly hydrophilic. It is an effective way to improve sludge dewaterability by regulating the content of soluble EPS and protein substances in activated sludge. In this study, sludge dewatering performance was observed by using different carbon materials to regulate sludge, and the characteristics of sludge floc, EPS content and composition were analyzed. The results showed that the carbon materials can improve the sludge dewatering performance, and the bigger the adsorption capacity of carbon materials, the better the dewatering performance of the sludge. The effect of different carbon materials on sludge flocs is different. The sludge floc became larger by conditioning with activated carbon AC-0, HNO3-modified activated carbon （AC-1） and graphite, while sludge flocs were reduced after conditioning with the dry-process modified activated carbon （AC-5）. The fluorescence values of peak A, peak B, peak C and peak D in EPS were effectively reduced after conditioning with carbon materials, and their adsorption effects on humic acid and fulvic acid were better than those on protein. The adsorption effect of the molecular weight substance and the middle molecular weight substance is better than that of the large molecular weight substance.
Key words:sludge/
carbon material/
activated carbon modification/
EPS/
dewaterability.

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刊出日期:2018-07-26

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炭材料调理改善活性污泥脱水性能的影响机制

同帜^1,,
王瑞露^1,2,
曹秉帝²,
张伟军³,
王东升²
1.西安工程大学环境与化学工程学院，西安 710048
2.中国科学院生态环境研究中心环境水质学国家重点实验室，北京 100085
3.中国地质大学武汉环境学院，武汉 430074
基金项目: 国家自然科学基金资助项目（51338010,51678546）
关键词: 污泥/
炭材料/
活性炭改性/
EPS/
脱水性
摘要:活性污泥中的胞外聚合物EPS含黏性蛋白类物质并高度亲水，调控污泥中溶解性EPS和溶解性蛋白类物质是改善污泥脱水的有效途径。通过使用不同炭材料调理污泥的方法来观察污泥脱水性能的变化，深入解析污泥絮体及EPS含量和组分的变化特征。结果表明：炭材料调理污泥可以改善其脱水性，且炭材料吸附容量越大对污泥脱水性改善效果越好；不同炭材料对污泥絮体影响效果不同，经过未改性活性炭（AC-0）、HNO3改性活性炭（AC-1）和石墨调理的污泥絮体粒径变大，经酸碱交替改性活性炭（AC-5）调理的污泥絮体粒径变小；炭材料调理后EPS中蛋白类的荧光峰A、B和腐殖酸、富里酸的荧光峰C、D都得到有效降低，且其对腐殖酸和富里酸的吸附效果比蛋白类物质要好，对低分子质量物质和中分子质量物质的吸附效果要好于对大分子质量物质的吸附效果。

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