MBBR工艺在采用氧化沟工艺的污水厂提标改造中的应用

台州黄岩江口污水一期工程提标改造规模为8×10⁴m³/d,本次工程将出水标准从《污水综合排放标准》(GB 8978—1996)二级标准提升至《城镇污水处理厂污染物排放标准》(GB18918—2002)一级A标准。提标核心目标为强化一期氧化沟的硝化、反硝化脱氮能力。在综合分析出水标准要求、氧化沟流态、硝化及反硝化过程的环境要求等因素后,确定氧化沟改造采用MBBR工艺,在池内采取了重新划分缺氧、好氧功能区,在好氧区投加填料,调整内回流泵参数,更改曝气方式等工程措施。工程运行结果表明,改造后运行成本降低,MBBR工艺能够达到设计出水标准,且对水质、水量冲击负荷具有良好的适应能力。

Application of MBBR Process in Upgrading and Reconstruction of Wastewater Treatment Plant(WWTP)with Oxidation Ditch Process

The design capacity of the upgrading and reconstruction project of the first phase of Huangyan Jiangkou wastewater treatment plant(WWTP)in Taizhou was 8×10^4 m^3/d.The effluent standard of this project was required to be enhanced from the second level of Integrated Wastewater Discharge Standard(GB 8978-1996)to the first level A standard of Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant(GB 18918-2002).The target of the upgrading and reconstruction project was to strengthen the nitrification and denitrification performance of the oxidation ditch in the first phase project.After the comprehensive analysis of the factors such as effluent standards,oxidation ditch flow state and the environmental requirements of nitrification and denitrification process,MBBR process was adopted for upgrading and reconstruction of the oxidation ditch process,engineering measures such as redividing the anoxic and oxic functional area,adding filler in aerobic area,adjusting the parameters of internal reflux pump parameters and changing aeration mode were adopted.The engineering operation results showed that the MBBR process could meet the design effluent standard and had good adaptability to the impact of water quality and water quantity.