HAO Xiao-di,GAN Wei,LI Ji,et al.Effectiveness of Ozonation on Oxidizing Secondary Effluent Organic Matter (EfOM) from WWTP[J].China Water & Wastewater,2021,37(10):1-7.
臭氧降解污水厂二级出水有机物作用与效果分析
- Title:
- Effectiveness of Ozonation on Oxidizing Secondary Effluent Organic Matter (EfOM) from WWTP
- Keywords:
- effluent organic matter (EfOM); ozonation; intermediates/oxidized by-products; ammonia nitrogen
- 摘要:
- 为控制黑臭水体，我国污水处理厂出水排放标准不断收紧，特别是对COD的限制。结果，深度处理工艺特别是臭氧氧化工艺开始应用于出水深度处理。臭氧处理固然可在一定程度上降低出水残留COD，亦可对药物及个人护理品(PPCPs)、内分泌干扰物(EDCs)等新兴微量有机物起到某种程度的去除作用。但是，臭氧不完全氧化时很容易将难降解有机物转化为易降解有机物，反而加剧受纳水体的耗氧程度，特别是形成的中间产物以及氧化副产物还具有毒性，会加大次生生态与健康风险。因此，仅仅以控制耗氧物质为目的而一味提高出水COD标准的做法值得商榷。事实上，经生物处理后出水COD中绝大部分为难生物降解的惰性有机物，即使排入受纳水体也不会耗氧。正因如此，欧美等发达国家一般并不对COD过分控制（甚至不控制），只对耗氧的BOD5和NH+4严格控制。此外，臭氧深度处理工艺投资、运行成本远远高于传统工艺，易对总环境造成负面影响。
- Abstract:
- To control black and malodorous water, the effluent discharge standards (especially for COD) of wastewater treatment plants in China are increasingly upgraded. Under the circumstance, some advanced treatment processes, especially ozonation, have been applied to the treatment of effluent organic matter (EfOM). Ozonation can indeed remove EfOM at an extent, including such micropollutants as pharmaceutical, personal care products (PPCPs) and endocrine disrupting chemicals (EDCs). However, refractory organic substances would be converted into readily biodegradable ones by incomplete ozonation, which could aggravate oxygen consumption in receiving waters, and moreover formed toxic intermediate products and/or oxidation by-products would also increase the secondary risks of ecology and human health. Therefore, it is questionable to blindly increase the COD standard of effluent for reducing oxygen-consuming substances. In fact, EfOM after biological treatment consists of inert organic substances that are difficult to biodegrade, which would rarely consume oxygen even if being discharged into receiving waters. For this reason, developed countries such as European, north American countries, etc. do not over-control COD (even no limit in some countries); instead, they strictly control BOD5 and NH4+. Furthermore, both investment and operational cost of ozonation are much higher than conventional processes, which might put a negative impact on the total environment.
相似文献/References:
[1]刘文琛,周伟伟,成小翔,等.臭氧组合技术对给水处理低压膜污染控制研究进展[J].中国给水排水,2020,36(8):44.
[2]段跟定,张胜利,吴国忠.五段Bardenpho/反硝化深床滤池/臭氧氧化处理工业园废水[J].中国给水排水,2020,36(22):116.
DUAN Gen-ding,ZHANG Sheng-li,WU Guo-zhong.Application of Five-stage Bardenpho/Denitrification Deep Bed Filter/Ozone Oxidation Process in Industrial Park Wastewater Treatment Project[J].China Water & Wastewater,2020,36(10):116.
[3]付尧,张丽婷.一体式组合池及臭氧氧化用于污水厂准Ⅳ类提标扩建[J].中国给水排水,2020,36(22):141.
FU Yao,ZHANG Li-ting.Application of Integrated Secondary Treatment and Ozonation in WWTP Upgrading and Expansion to Meet Quasi-Ⅳ Standards[J].China Water & Wastewater,2020,36(10):141.
[4]高波,丁西明,康建邨,等.臭氧氧化+混凝沉淀过滤+UF+RO工艺处理矿井排水[J].中国给水排水,2021,37(10):99.
GAO Bo,DING Xi-ming,KANG Jian-cun,et al.Treatment of Mine Drainage by Ozone Oxidation+Coagulation Sedimentation and Filtration+Ultrafiltration+Reverse Osmosis Process[J].China Water & Wastewater,2021,37(10):99.
[5]马捷汀,刘新亚,马鲁铭,等.铁基催化剂整砌填料催化臭氧的运行工况研究[J].中国给水排水,2022,38(5):32.
MAJie-ting,LIUXin-ya,MALu-ming,et al.Operating Conditions of Ozonation Process Catalyzed by Iron-based Catalyst Packing[J].China Water & Wastewater,2022,38(10):32.
[6]马振坤,刘永泽,张立秋,等.微气泡强化臭氧去除污水厂二级出水中的有机物[J].中国给水排水,2024,40(5):63.
MAZhen-kun,LIUYong-ze,ZHANGLi-qiu,et al.Microbubble Enhanced Ozonation for Removing Organic Matters from Secondary Effluent[J].China Water & Wastewater,2024,40(10):63.