Guiyang Distributed Underground Reclaimed Water Ecosystem of the Group Selected as a Carbon Peak and Carbon Neutrality Case in the Urban and Rural Construction Field of the Ministry of Housing and Urban Rural Development ​

In June 2023, the Science and Technology and Industrialization Development Center of the Ministry of Housing and Urban Rural Development released the "Typical Cases of Carbon Peaking and Carbon Neutrality in the Field of Urban and Rural Construction". The Guiyang Distributed Underground Reclaimed Water Ecosystem of China Water Environment Group was selected, and it was rated as a typical case of low-carbon layout in nearly 20 "City and Community" projects nationwide. It was presented in the first chapter, providing replicable and promotable reference experience for urban planning layout and infrastructure fields.

Collection of Typical Cases of Carbon Peaking and Carbon Neutrality in the Field of Urban and Rural Construction

This book serves as an important foundational material for the research on the path to achieving carbon peak and carbon neutrality in the construction field. From the perspectives of technical standards and management mechanisms, it analyzes typical cases and specific practices that can be replicated and promoted. In the case, the group changed the traditional large-scale interception and terminal centralized treatment model to a distributed model based on the principle of "moderate concentration, on-site treatment, and nearby reuse". 21 underground reclaimedwater plants were newly built and expanded in a distributed manner along the main and tributaries of the Nanming River, and 185 kilometers of river ecological restoration were carried out, forming an innovative technology system for urban scale sewage treatment and resource utilization of distributed underground reclaimedwater ecosystems.

Nanminghe and Jiaxiulou in Guiyang

Distributed underground reclaimedwater plants can fully utilize the cold and hot energy of recycled water, using a water source heat pump system to provide heating and cooling for nearby office areas, science museums, and surrounding communities. Currently, the system has achieved a service area of over 500000 square meters, which can reduce energy consumption and carbon emissions by about one-third compared to traditional heating and cooling methods. By significantly reducing the direct and indirect carbon emissions of urban drainage systems, water source heat pump systems and ground green plants can increase the system's carbon sink, achieving a total carbon reduction of over 40000 tons per year. Not only has it saved operating costs and investment in pipeline construction, but it has also achieved green and low-carbon development.

Guiyang Qingshan Underground Reclaimed Water Plant

The distributed model of this case effectively reduces the risk of "demolition relocation re demolition relocation", and has significant advantages in areas with prominent land conflicts. It has broad application prospects in the renewal and renovation of high-density old urban areas, and has reference value for optimizing the layout of urban drainage facilities, updating and renovating drainage systems, and other work.