[1]钟慧慧,沈玉芳,孜亚,等.正渗透技术浓缩剩余活性污泥的可行性[J].中国给水排水,2024,40(5):99-104.
　ZHONGHui-hui,SHENYu-fang,ZIYa,et al.Feasibility of Forward Osmosis Technology for Thickening Waste Activated Sludge[J].China Water & Wastewater,2024,40(5):99-104.
点击复制

正渗透技术浓缩剩余活性污泥的可行性

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第40卷 期数: 2024年第5期 页码: 99-104 栏目: 出版日期: 2024-03-01
Title:
Feasibility of Forward Osmosis Technology for Thickening Waste Activated Sludge
作者:
钟慧慧1， 沈玉芳1， 孜亚1， 易夏文1， 王新华1,2,3
（1.江南大学 环境与土木工程学院，江苏 无锡 214122；2.江苏省生物质能与减碳技术工程实验室，江苏 无锡 214122；3.江苏省水处理技术与材料协同创新中心，江苏 苏州 215009）
Author(s):
ZHONG　Hui-hui1， SHEN　Yu-fang1， ZI　Ya1， YI　Xia-wen1， WANG　Xin-hua1，2，3
（1. School of Environmental and Civil Engineering， Jiangnan University， Wuxi 214122， China； 2. Jiangsu Engineering Laboratory for Biomass Energy and Carbon Reduction Technology， Wuxi 214122， China； 3. Jiangsu Cooperative Innovation Center of Technology and Material of Water Treatment， Suzhou 215009， China）
关键词:
正渗透;  污泥浓缩;  剩余污泥;  城市污水;  出水回用
Keywords:
forward osmosis;  sludge thickening;  waste activated sludge;  municipal wastewater;  effluent reuse
摘要:
针对剩余污泥浓缩工艺存在的浓缩效果差、上清液污染物浓度高等问题，基于正渗透（FO）膜分离技术具有污染物截留性能好和膜污染趋势小等特点，进行了FO浓缩剩余污泥工艺（FST）长期运行的可行性研究。结果表明，当剩余污泥浓度在5 g/L左右时，经过13 d的运行，FST工艺将剩余污泥的悬浮固体浓度（MLSS）和挥发性悬浮固体浓度（MLVSS）分别提升至30和12.5 g/L以上，实现了剩余污泥的浓缩目标。同时，FST工艺的出水水质明显优于微滤膜浓缩工艺（MST）和重力浓缩工艺，达到了直接排放或者作为城市杂用水进行回用的要求。此外，在浓缩效率相当的情况下，FST工艺比MST工艺的膜污染更轻。FST工艺在实现污泥浓缩的同时解决了浓缩上清液的出路问题，在城市污水处理厂剩余污泥浓缩领域具有较好的应用潜力。
Abstract:
This paper investigated the feasibility of forward osmosis (FO) for thickening waste activated sludge (FST) in long-term operation based on the advantages of FO (such as good pollutant retention performance and resistance to membrane fouling), so as to solve the problems such as low thickening efficiency of sludge and high concentration of pollutants in supernatant of waste activated sludge (WAS) thickening process. When the concentration of WAS was approximately 5 g/L, the mixed liquor suspended solid concentration (MLSS) and mixed liquor volatile suspended solid concentration (MLVSS) of WAS were increased to more than 30 g/L and 12.5 g/L respectively after 13 days of operation, and the goal of WAS concentration was realized. In addition, the effluent quality of the FST process was obviously better than that of the microfiltration membrane thickening process (MST) and traditional gravity thickening process, which met the requirements of direct discharge or reuse as municipal miscellaneous water. Finally, the FST process had slighter membrane fouling than that of the MST process with equivalent thickening efficiency. FST process is capable of realizing simultaneous sludge thickening and safe discharge of sludge supernatant, which has good application potential in the field of WAS thickening in municipal wastewater treatment plants.

相似文献/References:

[1]杨应明,王旭东,刘玄宁,等.汲取液EDTA-2Na对正渗透MBR运行性能的影响[J].中国给水排水,2021,37(11):9.
　YANG Ying-ming,WANG Xu-dong,LIU Xuan-ning,et al.Effect of EDTA-2Na Draw Solute on Operating Performance of Forward Osmosis MBR[J].China Water & Wastewater,2021,37(5):9.
[2]魏永,吴宏,罗政博,等.正渗透去除单宁酸的影响因素分析[J].中国给水排水,2022,38(1):70.
　WEI Yong,WU Hong,LUO Zheng-bo,et al.Influence Factors of Forward Osmosis on Tannic Acid Removal[J].China Water & Wastewater,2022,38(5):70.
[3]朱明飞,郑成龙,崔雯,等.分子质量对天然水体有机物正渗透膜分离的影响[J].中国给水排水,2024,40(9):107.
　ZHUMing-fei,ZHENGCheng-long,CUIWen,et al.Effect of Molecular Weight on Forward Osmosis Membrane for Separation of Organic Matters in Natural Water[J].China Water & Wastewater,2024,40(5):107.

更新日期/Last Update: 2024-03-01