Project introduction

The landfill leachate treatment plant adopts the international advanced combined process of "external MBR (two-stage biological denitrification) + two-stage nanofiltration/reverse osmosis". The treatment scale is 500m3 /d, and the treated effluent meets the national emission standard. The project adopted SURO NF30-8040 membrane elmemnt and replaced the original imported nanofiltration membrane products. Since its installation and operation in June 2018, the nanofiltration membrane system has maintained a good CODcr removal rate while operating at a lower energy consumption.

The process flow

The process flow of on-site waste osmotic treatment is shown in the figure below.

Apply product and membrane component parameters

Model	Output/Set	Membrane Flux	Recovery Rate	System Rejection(%)	Operating Pressure
SURO NF30-8040	500m³/d	18.0LMH	85%	＞92%	0.6MPa

Nanofiltration membrane water production standard discharge

After landfill leachate is treated, it meets table 3 of Domestic Garbage Landfill Pollution Control Standards (GB16889-2008) (Some pollutants)

No.	Foulants	Permeate Concentration	No.	Foulants	Permeate Concentration
1	chrominance (dilution multiple)	30	4	SS(mg/L)	30
2	CODcr(mg/L)	60	5	TN(mg/L)	20
1	BOD5(mg/L)	20	6	NH3-N(mg/L)	8