ZhangGuangxue,ChenQi,FangLiaowei,et al.Application of PTA2O Process for the Upgrading and Expansion of a Wastewater Treatment Plant[J].China Water & Wastewater,2026,42(16):151-155.
PTA2O工艺用于污水处理厂提标扩能改造
- Title:
- Application of PTA2O Process for the Upgrading and Expansion of a Wastewater Treatment Plant
- Keywords:
- PTA2O process; MBBR process; CAST process; upgrading and expansion
- 摘要:
- 哈尔滨某污水处理厂需实施提标扩能改造，出水水质由《城镇污水处理厂污染物排放标准》（GB 18918—2002）的一级B提高到一级A，处理规模由5.0万m3/d扩大至8.0万m3/d。该厂原采用水解酸化+循环式活性污泥法（CAST）工艺，在无富余用地且不停水的情况下，采用将水解酸化池原位改造为移动床生物膜反应器（MBBR）（处理水量为1.5万m3/d）、CAST工艺原位改造为倍增型改良A2O（PTA2O）工艺（处理水量为6.5万m3/d）的技术方案。PTA2O工艺选择区的水力停留时间（HRT）为1.0 h，缺氧区HRT为 4.5 h，厌氧区HRT为 1.0 h，好氧区及沉淀区HRT为 9.7 h，外回流比为200%~300%，内回流比为 350%~450%，混合液悬浮固体（MLSS）为4.5~12.0 g/L。运行结果表明，在不增加生物池容且处理规模扩大、进水污染物浓度提高的情况下，PTA2O工艺出水水质不仅满足GB 18918—2002的一级A标准，而且设备数量和使用功率大幅减少。与传统高氧工艺相比，在相同进水水质和出水标准条件下，PTA2O工艺的池容效率提高39.30%，吨水使用功率降低40.45%。
- Abstract:
- A wastewater treatment plant in Harbin has implemented upgrading and expansion, and the effluent quality has been raised from the first B standard to the first A standard of the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002), and the scale has been expanded from 5.0×104 m3/d to 8.0×104 m3/d. Hydrolytic acidification + CAST process was originally used. In the case of no surplus land and non-operation during construction, the hydrolysis acidification tank is transformed in-situ into MBBR process (treatment quantity is 1.5×104 m3/d), and the CAST process is transformed into PTA2O process (treatment quantity is 6.5×104 m3/d). The design HRT of a single functional area of PTA2O process are: 1.0 h in selective area, 4.5 h in anoxic area, 1.0 h in anaerobic area, and 9.7 h in oxic and sedimentation area, the external return ratio is 200%-300%, the internal return ratio is 350%-450%, and the adjustable range of MLSS is 4.5-12.0 g/L.The operation results show that under the condition of no increasing the tank volume, expanding the treatment scale and increasing the concentration of water pollutants, the PTA2O process not only meets the first A standard, but also reduces the number of process equipment and the installed power. Compared with the traditional high-oxygen process, under the same influent quality and the same discharge standard, the tank capacity efficiency of PTA2O process is improved by 39.30%, and the power per ton of water is reduced by 40.45%.
相似文献/References:
[1]刘影,赖长清.悬浮填料耦合斜板沉淀改造MSBR的实践[J].中国给水排水,2024,40(6):108.
LIUYing,LAIChang-qing.Renovation Practice of MSBR by Suspended Filler Coupled with Inclined Plate Sedimentation[J].China Water & Wastewater,2024,40(16):108.
[2]王洪刚,纪海霞,程树辉.哈尔滨市某污水处理厂提标改扩建工程设计[J].中国给水排水,2024,40(10):64.
WANGHong-gang,JIHai-xia,CHENGShu-hui.Design of a Wastewater Treatment Plant Upgrading and Expansion Project in Harbin[J].China Water & Wastewater,2024,40(16):64.
[3]李志刚,韩文杰,杨忠启,等.四川某CASS污水厂连续流MBBR准Ⅳ类提标方案设计[J].中国给水排水,2025,41(2):52.
LI Zhi-gang,HANWen-jie,YANGZhong-qi,et al.Scheme Design for Continuous Flow Class Ⅳ Standard Upgrading Using MBBR Process in a WWTP with CASS Process in Sichuan[J].China Water & Wastewater,2025,41(16):52.
[4]杨新慈,李军,周家中,等.生物膜和活性污泥用于污水高标准脱氮对比[J].中国给水排水,2025,41(2):95.
YANGXin-ci,LIJun,ZHOUJia-zhong,et al.Comparison of Pure MBBR and Activated Sludge for High Standard Denitrification of Wastewater[J].China Water & Wastewater,2025,41(16):95.
[5]韩小波,邹婷,王维康,等.基于原位扩容改造的AOA耦合MBBR工艺中试研究[J].中国给水排水,2025,41(5):1.
HANXiao-bo,ZOUTing,WANGWei-kang,et al.Pilot Test of AOA Coupled MBBR Process Based on In-situ Capacity Expansion and Transformation[J].China Water & Wastewater,2025,41(16):1.