污泥太阳能干化技术研究进展

 随着中国污水处理率的提高，污泥产量以每年10%～15%的速度增长。大量的污泥对环境造成了巨大压力，并引起了二次污染。脱水污泥的有机物含量高，含水率也高达80%，使得污泥处置困难。污泥干化是实现污泥稳定化、减量化、资源化的重要前提，是污泥处理处置的重要方法之一。污泥干化是一个耗能过程。热泵辅助太阳能污泥干化可以降低干化能耗。本文总结了国内外污泥太阳能干化技术的研究进展，提出了基于太阳能蓄热和热泵辅助的污泥太阳能干化技术，并认为这是今后太阳能干化技术的重要发展方向。

Recent Developments in Wastewater Sludge Solar Drying Technology

With the increase of the practice of sewage treatment in China, the annual growth rate of the sludge production reaches 10%～15%. The production of a large amount of sewage sludge creates tremendous pressure and secondary pollution in environment. The high content of organic substance and water, normally over 80%(wet basis), makes the treatment of dewatering sewage sludge rather difficult. Thermal drying of the sludge is an important treatment and process and is an important prerequisite for the stabilization of sludge, the reduction of sludge volumes and the utilization of sludge, but a quite large amount of energy is required for drying sludge. Heatpump assistant solar drying of the sewage sludge may reduce the energy requirement. In this paper, the recent development in the wastewater sludge solar drying technology in China and other countries is reviewed, and it is suggested that the key development in the sludge solar drying technology in the future is the heat storage and heatpump assisted wastewater sludge solar drying technology.