摘要
南通某化工园区污水处理厂进水水质复杂,主要处理园区内农药、医药、精细化工等企业预处理后的废水,而现有处理系统存在原始设计缺陷且设备老化严重,出水水质已无法满足《城镇污水处理厂污染物排放标准》(GB 18918—2002)的一级A排放标准,同时高昂的运行成本极大增加了企业负担,因此决定进行分阶段提标改造。通过增设物化预处理、优化生化处理工段、新增末端深度处理工段的方式完成整改,最终形成臭氧氧化池+水解酸化池+A/O池+二沉池+芬顿氧化池+高密度澄清池+V型滤池的污水处理组合工艺,对物化污泥采用调理+板框压滤+低温干化组合工艺,改造完成后出水水质稳定达到排放标准,综合运行成本降低2.5元/m^(3)。面对后期可能执行的江苏新地标,可通过改造现有V型滤池为反硝化生物滤池实现深度脱氮,并在整个工艺的最末段增设活性炭吸附罐作为保障措施实现对COD与残留有机氮的去除。
The influent quality of a wastewater treatment plant(WWTP)in a chemical industrial park in Nantong is complex,which mainly treats the pre‑treated sewage of pesticides,pharmaceuticals,fine chemicals and other enterprises in the park.However,the existing treatment system had the original design defects and the equipment was seriously aged,thus the effluent was unable to meet the level A criteria in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant(GB 18918-2002),while the high operating cost greatly increased the enterprise’s burden.Therefore,the WWTP adopted a phased upgrading and reconstruction,by adding physical and chemical pre‑treatment,optimizing biochemical treatment section and adding terminal advanced treatment section.Finally,the combined treatment process of ozone oxidation tank,hydrolysis acidification tank,A/O tank,secondary sedimentation tank,Fenton oxidation tank,high‑density clarifier,V‑type filter was formed.The combined process of sludge conditioning,plate and frame pressure filtration and low temperature drying was adopted for physicochemical sludge treatment.After the completion of the transformation,the effluent quality met the standard requirements stably,and the comprehensive operation cost was reduced by 2.5 yuan/m^(3).In the face of the new standard of Jiangsu Province that may be implemented in the later period,the existing V‑type filter could be transformed into a denitrification biofilter to achieve advanced nitrogen removal,and an activated carbon adsorption tank could be added at the end of the whole process as a safeguard measure to achieve the removal of COD and residual organic nitrogen.
作者
周呈
周宇翔
叶阳阳
孙慧频
ZHOU Cheng;ZHOU Yu‑xiang;YE Yang‑yang;SUN Hui‑pin(Jiangsu Environmental Protection Group Nantong Co.Ltd.,Nantong 226001,China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2024年第12期114-119,共6页
China Water & Wastewater
基金
江苏省环保集团南通有限公司科研支撑项目(JSEPNT-KY-2023-002)。
关键词
化工园区
臭氧射流曝气
高密度澄清池
污泥低温干化
提标改造
chemical industry park
ozone jet flow aeration
high‑density clarifier
low temperature sludge drying
upgrading and reconstruction
