(1) Project site:
No.16 Jieneng Avenue, Huaikou Town, Jintang County, Chengdu, Sichuan Province.
Chengdu Huanneng Demei Environmental Protection Equipment Manufacturing Co., Ltd.
100 m3/d domestic sewage treatment.
(4) Date of operation:
(5) Investment, construction and operation:
It was invested, built and operated by the Owner.
2. Major environmental problems to be addressed
It mainly supplies emergency domestic water and drinking water and ensures water safety of personnel in the plant area.
3. Environmental standards and/or main index limits to be followed
The domestic water quality shall conform to the Standards for Drinking Water Quality (GB 5749-2006) and the drinking water quality shall follow the Water Quality Standards for Fine Drinking Water (CJ 94-2005).
4. Technological process
Groundwater or surface water → lift pump → pipeline mixer → folded plate reactor → inclined plate sedimentation tank → solution tank → ultrafiltration feed water pump → disc filter → ultrafiltration device → ultrafiltration water tank → variable frequency water supply pump → user.
5. Environmental pollution control effects
For the influent, SS≤50 mg/L, turbidity≤100 NTU, TDS≤1,000 mg/L, hardness≤450 mg/L, iron ion≤0.3 mg/L; for the effluent, no SS and turbidity, TDS≤38 mg/L, hardness≤4 mg/L and no iron ion.
6. Investment and operation cost
The investment of the project was RMB 450,000 and the operation cost was RMB 0.5/t·water.
Case highlights: The project adopts an integrated equipment and membrane water supply station to handle slightly polluted water sources, saving land area and ensuring the water safety of personnel in the plant area. The equipment was listed in the China Practical Guide to Emergency Products of the Ministry of Industry and Information Technology in 2017.