Analysis of engineering design features of sewage sludge carbonization in urban wastewater treatment plants
The underground wastewater treatment plant in Guangzhou has a structural con-struction capacity of 10 × 104 m3/d,mechanical installation capacity of 5 × 104 m3/d and sludge treatment scale of 35 t/d(sludge weighted with 80％moisture content).Sludge is treated using a combined process with plate press dewatering and integrated continuous drying and carbonization,reducing the moisture content from 98％to 5％,achieving extreme reduction of sludge volume within the plant.After the carbonization process,sludge forms biochar with a large specific surface area,which is rich in nutrients such as nitrogen,phosphorus,potassium,and stable calorific val-ue,with a wide range of resource utilization.According to calculations,the direct operation cost of the entire sludge treatment and disposal process is approximately 260 to 295 RMB per ton(calcu-lated with sludge with 80％moisture content).This project can provide design examples for the implementation of sludge projects in other cities.
CarbonizationBiocharUnderground wastewater treatment plantResource utili-zation of sludge
万方数据
维普
