杜至力1,唐霞2,张锐坚1,董浩韬1,许家文2,李振兴1,孙志民1,李碧清2
(1.广州市市政工程设计研究总院有限公司,广东省广州市 510060;
2.广州市净水有限公司,广东省广州市 510627)
摘要:近年来,由于污水处理标准提高、污水处理污泥的处理处置困难等原因,污水处理厂迫切需要进行提标改造。但由于受场地、投资等的限制,需要在污水厂现工艺基础上增加三级处理工艺的提标改造方案难以实施。因此,研究出水水质更佳,剩余污泥产量更少的二级处理工艺,具有重要意义,是污水处理技术未来的发展方向。推流式固定载体生物与活性污泥耦合工艺,具有脱氮效果好、剩余污泥产量少等优势。本研究建立了规模为120m3/d的推流式固定载体生物与活性污泥耦合工艺中试试验装置,利用污水厂进厂污水进行试验,对该工艺的运行效果进行考察和验证。试验结果表明:1.推流式固定载体生物与活性污泥耦合工艺出水效果良好,出水指标中除SS外,其余均达到准IV类水质标准;2.与常规的A2/O工艺对比,推流式耦合工艺可减少约20.6%的剩余污泥排放。
关键词:固定载体;活性污泥;耦合工艺;强化脱氮;污泥减量
中图分类号:文献标识码:文章编号:
Pilot-scale Research on Immobilized Carrier and Suspended Sludge Coupling Process
Du Zhi-li1, Tang Xia2, Zhang Rui-jian1, Dong Hao-tao1, Xu Jia-wen2, Li Zhen-xing1, Sun Zhi-min1, LiBi-qing2
(1. Guangzhou Municipal Engineering Design &Research Institute Co. Ltd., Guangzhou 510060, China; 2.Guangzhou Sewage Purification Company Co. Ltd., Guangzhou 510627, China)
Abstract:Due to the ever-tightening emission standard and the difficulty of excess sludge treatment and disposal, many WWTPS need to carry out equipment upgrading and reconstruction. However, because of the site-specific & investment constraints, the upgrading schemes, which have additional land requirements and long production break downs, are difficult to carry out. Therefore, researches focusing on advanced pollutant removal, and excess sludge reduction within the secondary process, will be significant at this time. The Immobilized Carrier and Suspended Sludge Coupling Process has advantages of high nitrogen removal efficiency and low excess sludge yield. In order to verify the process performance with actual wastewater, a 120 m3/d pilot-scale system have been established. The test results showed that: 1. except for the SS index, the rest of the effluent index meet the preparative class IV surface water standards; 2. compare with the conventional A2/O process, the immobilized carrier and suspended sludge coupling process is able to reduce excess sludge discharge by about 20.6%.
Key words: Immobilized Carrier; Suspended Sludge; Coupling Process; Enhanced Nitrogen Removal; Excess Sludge Reduction