磁热干化隔膜压滤一体化技术应用于市政污泥脱水干化的工程实践

Engineering application of integrated magnetic thermal drying and membrane pressure filtration technology in municipal sludge dehydration and drying

剩余污泥的妥善处理成为城市污水厂持续稳定运行的重要保障,污泥减量是城市污水处理系统提升运行效能的一个重要方面。因此,开发适合我国污泥泥质特征的污泥处理处置与资源化技术意义重大。磁热干化隔膜压滤一体化技术将电磁加热、板框压滤、真空强化耦合能够在一个处理过程将市政污泥含水率从98%直接降至40%。以南方污水处理厂为例,处理污泥35 t/d(折算到80%含水率)的应用实践结果表明,磁热干化隔膜压滤一体化技术系统简单可靠,占地面积小;无需二段式热干化,减少设备投资。相较于采用普通板框压滤机处理污泥,污水处理厂污泥项目运营节约81.6万元/年,而且解决了污泥出路问题,从节能环保角度实现经济效益和环境效益的双赢。

Proper treatment of residual sludge the guarantee for sustainable and stable operation of urban sewage plants,and sludge reduction is an important aspect of improving the operation efficiency of urban sewage treatment systems.Developing sludge treatment and recycling technology suitable for sludge characteristics in China is essential.The integrated technology of magnetic thermal drying diaphragm filtration can reduce the moisture content of municipal sludge directly from 98%to 40%in one treatment process by electromagnetic heating,plate and frame filtration,and vacuum strengthening coupling.Taking a sewage plant in South China as an example,the application results of treating sludge 35t/d(80%moisture content)showed that the magnetic thermal drying membrane filtration integrated technology system was reliable,and occupied a small area.Two-stage heat drying was not required,resulting in reduced equipment investment.Compared with the use of ordinary plate and frame filter press to treat sludge,the operation of the sewage plant sludge project saved 816,000 yuan/year,solved the problem of sludge outlet,and realized a win-win situation of economic and environmental benefits from the perspective of energy conservation and environmental protection.