As the rapid growth of the urban population, the Shaanxi Fengxiang County Wastewater Treatment Station Phase II Project is to provide a capacity of 10,000m³/d on the reserved land based on the existing capacity of 5,000m³/d. The effluent is required to meet the requirement for class 1A in GB18918. Adopting the BioDopp biochemical process, the project was put into operation in September 2012. The actual effluent fully meets the design requirements.