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Decentralized Sewage Solutions for Resilient Cities

Decentralized wastewater treatment is an effective supplement to the urban “rainwater and wastewater collection + centralized wastewater treatment plant” model, and helps to build a resilient city.

Policy Basis

In June 2021, the National Development and Reform Commission and the Ministry of Housing and Urban-Rural Development issued the “Fourteenth Five-Year Plan” for the Development of Urban Sewage Treatment and Resource Utilization

By 2025, the national centralized collecting rate of city sewage will reach more than 70% and that in the county will reach more than 95%.

By 2035, sewage-collecting drainage will be installed nearly in all cities and in all countryside. Urban sewage is treated safely and efficiently, and all people share a green, ecological and safe urban water environment.

Pain Points in Urban Wastewater Treatment

Underdeveloped urban areas (old residential areas and in-city villages) often lack access to centralized sewage pipe networks, creating major bottlenecks in wastewater management.

Rapidly developing cities create large amounts of temporary sewage from construction and poorly coordinated urban development.

Collecting wastewater in areas with low to medium population density is difficult, such as suburbs, public parks, villas, or public restrooms.

Collecting high-risk wastewater from hospitals, schools, or quarantine hotels through centralized sewage networks is dangerous due to easily transmitted pathogenic microbes.

High-density wastewater from restaurants, bars, cafeterias, or water transfer stations are often treated with sub-standard methods.

Benefits of Decentralized Wastewater Treatment (DEWAT)

An effective supplementary system for urban wastewater treatment

By treating wastewater locally at the smallest unit, DEWAT solutions drastically reduce construction costs, project complexity, and maintenance overhead in urban areas where pipe network construction is difficult and expensive, and in areas with low-to-medium population density where scattered sewage spots are incompatible with centralized pipe networks (hotels, restaurants, schools, hospitals, residential areas, construction sites, public toilets, parks, reservoir management hubs, urban renewal areas, etc).

DEWAT solutions can be quickly and flexible installed in places where drainage can't be installed, thus reducing the pressure of urban wastewater, solving the problem of scattered wastewater pollution from urban development, imperfect planning, topography and other factors, and preventing biosafety risks from entering the environment.