襄阳护城河清淤底泥资源化制备种植土工艺设计

针对清淤工程产生的大量脱水泥饼的消纳难题,襄阳护城河清淤项目经调研比选设计了一套利用清淤底泥制备绿化种植土的工艺系统。该工程设计处理规模为100 t/d,以秸秆粉为主要添加材料,采用强化搅拌+快速堆肥工艺制备绿化种植土。结果表明,淤泥基绿化种植土主要性能指标达到《绿化种植土壤》(CJ/T 340—2016)规范要求,栽植试验效果良好,可满足鱼梁洲中心公园绿化建设种植土需求。该工程总投资为304. 40万元,单位直接处理成本为25. 7元/t,实现了脱水泥饼的资源化再利用,具有较好的经济效益和环境效益,可为类似工程脱水泥饼消纳问题提供借鉴。

Process Design for Producing Planting Soil from Dredged Sediment of Xiangyang Moat

To solve the disposal problem of large amount of dewatered sludge cake produced from dredging project,a set of process system was designed to produce planting soil for greening from dewatered sediment in Xiangyang moat dredging project through investigation and comparison.The design capacity of the project was 100 t/d,the straw powder was chosen as the dominated additives and a process of strengthened stir&rapid composting was adopted.The results showed that the main indicators of planting soil for greening produced from dewatered sediment reached the requirements of Planting Soil for Greening(CJ/T 340-2016).The planting test turned out to be satisfactory,which could meet the demand for planting soil in the greening construction of Yuliang island central park.The total investment of the project was 3.044 million yuan,and the direct unit operation cost was 25.7 yuan/t.This project realized the reutilization of dewatered sediment,which exhibited preferable economic and environmental benefits,and could provide reference for similar projects in disposal of dewatered sediment.