1. Project Overview

Located at the intersection of Anlian Road downstream of Cuiping Road flood drainage channel, this dual-cylinder parallel integrated sewage and flood drainage pumping station is built for black & odorous water treatment of Cuiping Channel. The system consists of a Φ3.8 m integrated axial flow pumping station and a Φ3 m integrated prefabricated pumping station with a uniform cylinder height of 7.42 m. The design capacity reaches 326 m³/h in dry weather and 1.5 m³/s for flood drainage in rainy weather. Differentiated scheduling under dry and rainy conditions eliminates channel water accumulation, reduces clean water inflow into sewage pipe networks and fundamentally addresses black & odorous water issues of Cuiping Channel.

2. Project Pain Points

The Cuiping Road flood drainage channel covers a wide watershed with numerous pollution sources, imperfect pipe networks and poor hydrodynamic conditions. Affected by river bed slope and tidal water levels, water accumulated in the channel cannot be fully drained after rainfall, continuously forming black & odorous water. Massive rainwater and sediment flow into municipal sewage pipe networks, leading to long-term overload of sewage treatment plants and risks of excessive discharge.

3. Supumps Solutions

An innovative dual-cylinder parallel scheme combining integrated prefabricated pumping station and integrated axial flow pumping station is adopted for differentiated intelligent scheduling:

*1. Dry weather mode: The sewage interception pumping station operates to deliver channel sewage to the sewage treatment plant for disposal.

*2. Rainy weather mode: The sewage interception pumping station shuts down, and the flood drainage axial flow pumping station starts to discharge rainwater directly into Qianshan River to prevent urban waterlogging.

*3. This operation mode effectively avoids massive clean water entering sewage pipe networks, reserves processing capacity for sewage treatment plants and guarantees stable sewage disposal.

4. Project Value

Adopting an innovative dual-cylinder parallel design with separate scheduling for dry and rainy periods, this project satisfies dual demands of sewage interception & pollution treatment and flood drainage in rainy seasons. It efficiently addresses complex water environment problems including channel water accumulation, black & odorous water and sewage plant overload caused by tides, providing a typical demonstration scheme for comprehensive river governance in coastal tidal regions of South China.

1. Project Overview

As a key sub-project of comprehensive black & odorous water treatment for North and South Nangang Rivers in Yueyang Economic & Technological Development Zone, this project advances the Yangtze River Protection Strategy by implementing sewage interception renovation along Nangang River. One set of integrated prefabricated sewage pumping station is deployed with a cylinder diameter of 3.5 m and total height of 10.22 m. It has a dry-weather design capacity of 2,500 m³/d and rainy-season capacity of 10,000 m³/d, equipped with 4 submersible pumps. Pump effluent connects to the main interception pipeline on the south bank of North Nangang River, improving regional sewage collection efficiency to realize 100% sewage interception in dry weather, reduce pollutant inflow into the river and eliminate black & odorous water.

2. Project Pain Points

As an upstream river of Nanhu Lake, Nangang River suffers incomplete regional sewage pipe networks with raw sewage discharged directly into the river, causing severe black & odorous water and damaging the aquatic environment of the Yangtze River and Dongting Lake water system. The pumping station is to be constructed inside a pond with limited construction conditions. Continuous rainfall during construction brings high risks of foundation pit waterlogging and equipment hoisting & installation, coupled with tight construction schedules.

3. Supumps Solutions

*1. Customized Integrated Prefabricated Sewage Pumping Station

The Φ3.5 m ×10.22 m cylinder adapts to foundation pit excavation construction inside the pond. Four pumps are configured to meet differentiated sewage lifting demands in dry and rainy seasons. The compact equipment occupies a small construction area with short installation cycles and can be integrated into riverbank landscapes. 

*2. Supporting Intelligent Remote O&M System

Equipped with the Supumps intelligent cloud remote monitoring platform, managers can monitor real-time data and control the pumping station remotely via mobile phones or computers to realize unattended operation and reduce long-term maintenance workload. 

*3. Efficient On-site Construction Support

Facing harsh rainy construction conditions, the construction team seized construction windows to complete hoisting and installation overnight, overcoming foundation pit waterlogging risks and ensuring smooth delivery and commissioning of the pumping station.

4. Project Value

This project is a typical model of sewage interception governance for black & odorous urban rivers along the Yangtze River. The integrated prefabricated pumping station improves riverbank sewage interception systems to cut pollutant inflow into rivers at the source and restore the aquatic environment of Nangang River, offering mature solutions for sewage interception and water ecological restoration of inland rivers along the Yangtze River Basin.