Xiajin County, the second phase of the expansion project is located in the southwest of the second wastewater treatment plant, with a total investment of 45 million yuan, a building area of 180 square meters, the second phase of the expansion project using "coarse grating and intake pumping station - pre-settling tank - fine grating and aeration sand sedimentation tank - hydrolysis and acidification tanks - A?O-type biochemical tanks - two sedimentation tanks - intermediate Lifting pumping station - ozone contact pool - aeration biofilter - fiber rotary disc filter - contact disinfection pool" treatment process, sludge treatment project adopts "gravity thickening - high-pressure plate and frame dewatering machine" treatment process, the effluent quality of water to implement the "municipal wastewater treatment plant pollutant discharge standards" (GB18918-2002) Class A standards, the design of wastewater treatment plant and the pumping room, the design of the wastewater treatment plant and the pumping station. 2002) A standard, the design of sewage treatment scale of 10,000 tons / day.

Xiajin County, also known as Yinxiajin, belonging to Dezhou City, Shandong Province, is located in the northwestern plains of Shandong Province, the junction of Lu and Hebei Province, north of Dezhou, south of Liaocheng, west of the Beijing-Hangzhou Grand Canal. With a total area of 882 square kilometers, it is under the jurisdiction of 10 towns, 2 townships, 2 streets, 1 provincial-level economic development zone, 470 administrative villages and 18 urban communities, with a resident population of 458,000 (as of June 2021). It is the most promising county of China's private economy, the international ecological safety tourism demonstration base, the strong county of national food industry, the hometown of China's mulberry, the demonstration county of China's vegetable oil, China's flour county, and China's famous cotton textile city.