HEZhi-jian,BEIDe-guang,XUQian,et al.Application of Sludge Bioleaching Deep Dehydration in Upgrading and Expansion of a WWTP[J].China Water & Wastewater,2023,39(4):112-117.
污泥生物沥浸深度脱水工艺用于污水厂提标扩建
- Title:
- Application of Sludge Bioleaching Deep Dehydration in Upgrading and Expansion of a WWTP
- Keywords:
- bioleaching; sludge treatment; upgrading and reconstruction
- 摘要:
- 南宁市江南污水处理厂水质提标及三期扩建工程完成后污水总处理规模将达到72×104 m3/d，预计污泥产量为500 t/d（含水率为80%）。为进一步推动污泥的处理处置实现无害化、减量化，并为稳定化和资源化创造良好的条件，该污水处理厂新建了污泥处理系统，采用生物沥浸深度脱水工艺，产出泥饼不再黑臭，含水率降至60%以下，体积比浓缩污泥减少90%~95%。经过近一年的试运营，在75%的生产负荷下，可稳定产出含水率约60%的泥饼约80 t/d，基本实现设计目标。总结了生物沥浸深度脱水工艺的中试、工程建设以及调试运行的主要内容，列出了较为详尽的试验数据及工艺参数，对其他类似污泥处理系统的设计及运行具有借鉴意义。
- Abstract:
- After the completion of water quality improvement and phase Ⅲ expansion project of Jiangnan Wastewater Treatment Plant (WWTP) in Nanning, the total sewage treatment capacity will reach 72×104 m3/d, and the expected sludge output is around 500 t/d with water content of 80%. In order to further realize the harmless processing and minimization of sludge, and create favorable conditions for stabilization and resource utilization of sludge, the WWTP builds a new sludge treatment system, which adopts the bioleaching deep dehydration technology. The output sludge cakes by the technology can fundamentally change the black and odorous appearance of the raw sludge, reduce the water content to less than 60%, and reduce the volume of the thickened sludge by 90% to 95%. After around one year of trial operation, the new sludge treatment system can steadily output around 80 t of mud cakes with the water content of around 60% on a daily basis and under the production load of around 75%, which basically realized the system’s designed objective. By summarizing the whole application process of the bioleaching deep dehydration technology from the pilot-scale test to project construction and to trial operation, this paper lists detailed experimental data and technological parameters, which can also provide references for the design and operation of the other similar sewage treatment system.
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