Rainwater Harvesting and Greywater Recycling Solution & Process Technology Manufacturer

Rainwater Harvesting and Greywater Recycling Solution & Process Technology

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Turnkey solution for the capture, treatment and reuse of rainwater and greywater (wastewater from sinks and bathtubs)

Rainwater Harvesting and Reuse

Process flow
The rainwater harvesting process involves first flush diversion, followed by coagulation, filtration using multimedia filters, and disinfection through sodium hypochlorite dosing and UV disinfection systems. This multi-step process ensures the rainwater is clean and safe for reuse
Pre-treatment
Before entering the storage tank, rainwater undergoes sediment separation or coarse filtration to remove larger debris and impurities, ensuring efficient and effective treatment downstream
Storage tank design
Storage tanks and clean water tanks are designed with overflow and ventilation pipes, and include measures to prevent insect contamination. This ensures the stored water remains clean and safe for use
Material considerations
For tanks located under motor vehicle lanes, reinforced concrete is typically used due to its durability and strength. For tanks under non-motor vehicle lanes, lighter PP modules can be used, providing flexibility and ease of installation

Greywater Recycling and Reuse

Greywater sources in buildings include wastewater from sinks, showers, air conditioning cooling systems, condensate, swimming pools, laundry, kitchens, and toilet flushing. We offer various treatment processes tailored to different greywater types.

Process Flow

Raw Water Category		Process Flow	Water Usage	Installation Location
High-Quality Miscellaneous Discharge Water (COD: 90~200mg/l, BOD:50~100mg/l)	Air Conditioning Condensate (COD: 90~120mg/l)	Filtration (Multi-media Filter) Disinfection (Sodium Hypochlorite Dosing Unit and UV Disinfection Unit)	Irrigation, Car Washing, Toilet Flushing, Cooling Tower Make-up Water	Machine Room or Underground Integrated
	Wash Basin (COD: 100~150mg/l, BOD:50~100mg/l)	Hair and Lint Strainer Coagulation Sedimentation Filtration Disinfection
	Shower Wastewater (COD: 150~200mg/l, BOD:50~100mg/l)	Hair Filter Coagulation Sedimentation / A MBR Disinfection
Domestic Sewage (COD: 300~1000mg/l, BOD:100~600mg/l)	Toilet Sewage	Septic A (O/A2O) MBR (Advanced Treatment) Disinfection
Domestic Sewage (COD: 300~1000mg/l, BOD:100~600mg/l)	Kitchen Sewage	Oil Separation A (O/A2O) MBR (Advanced Treatment) Disinfection

Case Study

Rainwater Harvesting and Reuse - Shanghai Flower Expo
At the Shanghai Flower Expo, we installed a rainwater collection system that gathers 50,000 cubic meters from the Fuxing Pavilion roof and 30,000 cubic meters from outdoor areas. The system includes modules with a capacity of 3,400 cubic meters and two purification units treating 50 cubic meters per hour. The reclaimed water is used to irrigate 400,000 m², covering the core flower area, Century Pavilion, and Fuxing Pavilion surroundings.