Environmental Protection Equipment Co., Ltd. Shandong Ruizhao Xiang sewage treatment: To reach sewage water or drainage water quality requirements of a re-use of its purification process. The severity of sewage: surface water pollution is obvious buried sewage treatment equipment use, contaminated groundwater is shocking. China's 1.3 billion people buried sewage treatment equipment quality, 70% of drinking groundwater, more than 660 cities in more than 400 cities with groundwater as drinking water sources. But according to reports, over 90% of urban groundwater has been contaminated.