太原循环经济环卫产业园固体废物污水处理厂工艺设计

为解决太原循环经济环卫产业园内生活垃圾焚烧处理处置、餐厨垃圾处理处置及其他固废处理处置过程中产生的高浓度废水处理问题,拟新建一座污水处理厂。设计处理规模为1 200 t/d,主要包括750 t/d的焚烧厂垃圾渗滤液和450 t/d的餐厨沼液。渗滤液处理采用"气浮+调节池+内循环厌氧反应器+两级A/O-MBR"的核心工艺,餐厨沼液处理采用"气浮+调节池+两级A/O-MBR"的核心工艺。污泥处理采用"离心脱水+热干化"工艺,处理后污泥含水率≤30%,干化污泥采用密封车辆送至焚烧厂焚烧处理。试运行结果表明,出水水质稳定达到设计标准。污水处理厂总投资为1.3亿元,污水处理直接成本为23.5元/t。

Process Design of Solid Waste Wastewater Treatment Plant of Taiyuan Circular Economy and Environmental Sanitation Industrial Park

To solve the problem of the treatment of high concentration wastewater in the process of domestic waste incineration,kitchen waste treatment and other solid waste treatment and disposal in Taiyuan Circular Economy and Environmental Sanitation Industrial Park,a new sewage treatment plant was built.The design capacity was 1200 t/d,which mainly included 750 t/d landfill leachate of incineration plant and 450 t/d anaerobic digestion liquid of kitchen waste.The core treatment process of leachate was"air flotation+regulating tank+internal circulation anaerobic reactor+two-stage A/OMBR".The core treatment process of kitchen waste anaerobic biogas liquid was"air flotation+regulating tank+two-stage A/O-MBR".And"centrifugal dehydration+thermal drying"was used as the core treatment process of sludge while the water content reached less than 30%after dewatering.Then the dewatered sludge was sent to the incineration plant for incineration by sealed vehicles.The trial operation results showed that the effluent quality was stable and corresponded to the design standard.The total investment of sewage treatment plant was 130 million yuan.The direct cost of wastewater treatment was23.5 yuan/t.