Removal Of The Heavy Metals From The Urban Sewage Sludge By Using The Bioleaching Process

As the world population increasing quickly and economy growing fast, the problem of environmental pollution has become increasingly worse. In recent years, many municipal sewage treatment plants have been built, which effectively alleviate the pollution of water environment caused by the discharge of municipal sewage and industrial wastewater. At the same time, a large amount of sewage sludge produced during the process of sewage treatment may result in second pollution to the environment. Since there are high quality of nutrition elements such as nitrogen, phosphorus and kalium, the agricultural utilization of sewage sludge is become an important topics in nowadays research. However, the heavy metals in sewage sludge are the key factor restricting the utilization of sewage sludge in agriculture. Many studies have been made to decrease and reduce the poisonous effect of the heavy metals in sewage sludge, but the characters of system, economy and utility still cannot meet practical demands. Therefore, research on the removal of the heavy metal and the utilization of sewage sludge in agriculture has a very important significance .The sewage sludge from Taiyuan sewage treatment plant was taken and studied. The research aims is to effectively reduce the poisonous heavy metals and search for an effective method of using the sewage sludge as resources from microbe treatment.This article will briefly introduce some important techniques to deal with...