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Flat Sheet MBR Membrane

Flat Sheet MBR Membrane

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The water quality comparisons of MBR and CAS

Description

Input water

                                                              Output water

Typical municipal waste water

                                    MBR

CAS

Turbidity (NTU)

-

Membrane filtration process

< 1

5-20

SDI

-

< 3

> 5

TSS (mg/L)

100-300

< 1

10-30

BODs (mg/L)

300

Biological Process

< 5

< 30

COD (mg/L)

600

< 30

< 100

NH²-N(mg/L)

30

< 0.5

5-10

TN (mg/L)

40

< 15

> 25

TP (mg/L)

10-20

< 0.5

5-8

 The other comparisons of MBR and CAS

Description

MBR

CAS

Water quality

Directly reusable, higher then national standard

Meet national standard

Field area

About 1/3-1/2 m²/(m³.d-1)

About 1 m²/(m³.d-1)

Construction investment

RMB2000-2600/(m³.d-1)

RMB 1500-2000 /(m³.d-1)

Operation Cost

RMB0.7-1.0/m³

<0.7RMB/m³ (Direct water disharge) < 1.0RMB/m³ (Reclaimed water discharge)

Excess sludge

1/3 – 1/5 of CAS

Volume big, high processing cost

Operations management

Few devices simple flow process, easy to automatically control stable operation and remote control feasible

Many devices complicate flow process easy to break down and high operation cost

Water application

Reclaimed water and water for industrial use

Emission on standard