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The company utilizes its patented "Denitrification Deep-Bed Filter" technology to carry out upgrading and reconstruction projects of municipal sewage treatment plants, reducing the nitrogen discharge of sewage and upgrading the sewage discharge standard from Level 1A to the local standard of Class Ⅳ surface water.

The company has a professional operation and maintenance team, and owns nearly 20 operation and maintenance projects of sewage treatment plants in multiple provinces such as Tianjin, Zhejiang, Guizhou and Hebei, with a total designed daily treatment capacity of over 2.3 million tons per day.