摘要
在污水处理厂设计阶段,工艺的选择直接影响建设成本和运行成本。基于某污水处理厂升级改造的需求,在其方案比选阶段,采用污水生物处理工艺模拟软件(Biowin 5.3软件)比较了2种工艺(五段Bardenpho工艺与超磁预处理-五段Bardenpho工艺)的技术有效性,并通过建立经济性模型比较了2种工艺的经济性。结果表明:生物模拟软件可定量化评估待选技术的有效性和经济性,为工艺选择提供支撑;五段Bardenpho工艺在碳源用量方面占优,但尾水COD有超标风险;超磁分离-五段Bardenpho工艺在池容、曝气量方面更具优势;五段Bardenpho工艺投资成本高于超磁分离-五段Bardenpho工艺,但运行成本则相反。模拟软件评估结果表明,在污水处理厂的预处理阶段应用超磁分离技术可实现尾水COD的达标排放,有利于削减池容、降低投资成本,但不利于生物脱氮和节支降耗,每吨水的运行成本会增加0.37元,故该厂选择五段Bardenpho工艺更优。
During the design of a wastewater treatment plant, the selection of bio-process has a direct influence on the capital and operational costs. As such, activated sludge modeling platform Biowin 5.3 software was employed to evaluate and compare the technical performances of the Bardenpho and magnetic separationBardenpho processes during the upgrade of a sewage treatment plant(STP). The economic performance of the two options is also evaluated for the comparison by an economic model. Results show that activated sludge model could quantitative compare two technologies and help decision-making. The Bardenpho process has lower carbon source consumption, but has the risk of violating the effluent discharge limit on COD. The magnetic-Bardenpho is superior in reducing tank capacity and aeration rate. The capital cost of the Bardenpho process is higher than that of the magnetic-Bardenpho process, while the operation cost is lower. The application of magnetic separation technology in pretreatment has advantages in reaching the effluent discharge standard on COD, and reducing the tank capacity and the capital cost, but it is not favorable in biological nitrogen removal and the operation cost is increased by 0.37 RMB·t^(-1). Therefore, the Bardenpho process is selected for the case study STP.
作者
吴远远
翟学棚
林甲
江瀚
WU Yuanyuan;ZHAI Xuepeng;LIN Jia;JIANG Han(Beijing Capital Co.LTD,Sino-Dutch R&D Centre for Future Wastewater Treatment Technologies,Beijing 100044,China)
出处
《环境工程学报》
CAS
CSCD
北大核心
2021年第9期3143-3150,共8页
Chinese Journal of Environmental Engineering
关键词
生物建模
污水处理厂设计
超磁分离技术
经济性评估
biological modeling
design of STPs
magnetic separation technology
economic evaluation
