WUHanjiang,ZHUAifen,YUYong,et al.Retrofitting Practice of PACT-DAF-Ozone Process for Printing and Dyeing Wastewater Treatment[J].China Water & Wastewater,2026,42(12):178-184.
PACT+气浮+臭氧工艺处理印染废水改造实践
- Title:
- Retrofitting Practice of PACT-DAF-Ozone Process for Printing and Dyeing Wastewater Treatment
- Keywords:
- printing and dyeing wastewater; PACT; air flotation; ozone oxidation
- 摘要:
- 针对棉纺化纤印染废水占比升高导致进水难降解有机物浓度高、活性污泥性能恶化及出水色度超标等问题，浙江省某经济开发区污水处理厂实施了以“粉末炭活性污泥法（PACT）生物强化+溶气气浮+臭氧氧化”为核心的提标改造。改造后运行结果表明，系统抗冲击负荷能力显著增强，生物池的活性污泥沉降性能明显改善，污泥体积指数（SVI）平均降低34.6%；出水色度稳定在4～8倍，COD、氨氮、总氮、总磷等主要指标均稳定达到浙江省《城镇污水处理厂主要水污染物排放标准》（DB33/2169—2018）表1限值，其余指标满足《城镇污水处理厂污染物排放标准》（GB 18918—2002）的一级A标准。
- Abstract:
- To address the issues of high concentration of refractory organic compounds in the influent, deteriorated performance of activated sludge, and excessive chroma in the effluent resulting from the increasing proportion of cotton textile, chemical fiber and printing and dyeing wastewater, an upgrading and reconstruction project centered on “power activated carbon treatment （PACT） bioaugmentation + dissolved air flotation + ozone oxidation” was carried out at a wastewater treatment plant in an economic development zone of Zhejiang Province. The results demonstrate that the system exhibits significantly enhanced resistance to shock loading, and the settling property of activated sludge in the biological tank is remarkably improved, with an average reduction of 34.6% in sludge volume index (SVI). The effluent chroma is stably controlled at 4-8 dilution times. The main indicators including COD, ammonia nitrogen, total nitrogen and total phosphorus consistently meet the limits specified in table 1 of Discharge Standard of Major Water Pollutants for Municipal Wastewater Treatment Plant (DB33/2169-2018) of Zhejiang Province, while other indicators comply with the grade A standard of Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002).
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