LI Shi-song,ZHU Chun-feng,WEN Ru-qing,et al.Application of Modified A2O and Advanced Treatment Process in a Wastewater Treatment Plant Upgraded to Quasi-Ⅳ Surface Water Standards[J].China Water & Wastewater,2021,37(22):63-67.
改良A2O+深度处理工艺用于污水厂类Ⅳ类标准提标
- Title:
- Application of Modified A2O and Advanced Treatment Process in a Wastewater Treatment Plant Upgraded to Quasi-Ⅳ Surface Water Standards
- Keywords:
- upgrading and reconstruction; modified A2/O process; primary sedimentation/fermentation tank; high efficiency sedimentation tank; deep bed filter
- 摘要:
- 河北某污水处理厂提标改造工程的设计规模维持5×104 m3/d不变。在充分利用原有建（构）筑物及设施的情况下，改造原有CWSBR（恒水位SBR工艺）生物池为改良A2/O工艺，并设置脱气区、后缺氧区和后好氧区，强化生物脱氮除磷功能；新建初沉发酵池，在去除SS中无机组分的同时，改善碳源质量，充分利用内碳源；增加高效沉淀池+深床滤池+高级氧化池深度处理工艺，强化对二级生物处理出水中SS、TP、TN、有机物和色度的去除，使该污水处理厂出水标准由一级A标准提高至地表Ⅳ类水体标准（TN≤15 mg/L）。
- Abstract:
- The design scale of a wastewater treatment plant upgrading project in Hebei Province remains 5×104 m3/d. In full use of the original structures and equipment, the original CWSBR (constant water level SBR) process was transformed into modified A2/O process, and the degassing zone, postanoxic zone and post-aerobic zone were set up to enhance the biological nitrogen and phosphorus removal. In addition to removing inorganic components in the SS, the quality of the carbon source was improved and the internal carbon source was fully utilized in the newly-built primary sedimentation/fermentation tank. The advanced treatment process of high efficiency sedimentation tank, deep bed filter and advanced oxidation tank was added to enhance the removal of SS, TP, TN, organic matter and chroma in the secondary biological treatment effluent, so that the discharge standard of the wastewater treatment plant was upgraded from the first level A standard to the surface water class Ⅳ standard (TN is less than 15 mg/L).
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