Yantai Taoziwan Wastewater Treatment Co., Ltd.

Yantai Taoziwan Wastewater Treatment Co., Ltd. is a municipal wastewater treatment company based in Yantai, Shandong Province, China. It operates the Taoziwan Wastewater Treatment Plant, one of the largest in Shandong, with a total treatment capacity reaching approximately 470,000 cubic meters per day following expansions including a third phase completed around 2024-2025.

The company's primary activities encompass the collection, treatment, and disposal of municipal and industrial wastewater using advanced processes such as AAO biological treatment, coagulation-sedimentation, disk filtration, and membrane technologies including ultrafiltration and reverse osmosis. It also manages sludge treatment through anaerobic digestion for volume reduction, resource recovery, and biogas production, alongside initiatives in sewage-source heat pumps and distributed photovoltaic power generation for energy self-sufficiency and low-carbon operations.

Operating in Yantai's Zhifu District, the company supplies high-quality reclaimed water, with production capacity expanded to 200,000 cubic meters per day, primarily to the Wanhua Industrial Park and Yantai power plant for industrial cooling and other uses. This supports significant freshwater savings and environmental benefits, including annual CO₂ reductions.

Established in 2007 as a state-owned enterprise under the Yantai Urban Drainage Service Center, it is a co-founder and equity holder in the Yantai Reclaimed Water Co., Ltd. joint venture formed in 2017 with the drainage service center and Wanhua Chemical Group. The company plays a prominent role in China's wastewater recycling and circular economy sector, serving as a demonstration project for large-scale water reuse in northern coastal industrial cities.