DAIYang-ye,ZHANGDa-peng,WULin-fang,et al.Reconstruction Practice of Oxidation Ditch in a WWTP Upgrading Project[J].China Water & Wastewater,2022,38(24):92-96.
某污水处理厂提标工程中的氧化沟改造实践
- Title:
- Reconstruction Practice of Oxidation Ditch in a WWTP Upgrading Project
- Keywords:
- wastewater treatment plant; oxidation ditch; upgrading and reconstruction; denitrification
- 摘要:
- 某污水处理厂采用Carrousel氧化沟工艺，处理规模为5×104 m3/d。因廊道较长，无独立的缺氧区，设备损坏率较高，出水总氮长期不能达标。为使出水水质满足《城镇污水处理厂污染物排放标准》（GB 18918—2002）的一级A标准，决定在最大程度地保留利用已建构筑物的基础上进行提标改造。通过结构及设备改造，将氧化沟功能区进行重新划分，改造成AAO氧化沟工艺。实施改造后，氧化沟运行效果良好，管理方便，电耗下降约34.1%，节约电费约90万元/a。
- Abstract:
- The treatment capability of Carrousel oxidation ditch process in a wastewater treatment plant (WWTP) is 5×104 m3/d. Since the corridor is long and there are no independent anoxic zones, the damage rate of the equipment is relatively high, and the effluent total nitrogen could not meet the standard for a long time. It is determined to upgrade and reconstruct the process on the basis of the maximum reservation and utilization of the existing structures, so as to meet the first level A criteria specified in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002). Through the transformation of equipment and structures, the functional area of oxidation ditch was transformed into the AAO oxidation ditch process. After the transformation, not only has the oxidation ditch good operation effect and convenient management, but also the power consumption decreased by about 34.1%, which saves about 900 thousand yuan per year.
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