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MBR Membrane Application - Laundry Wastewater Treatment

MBR Membrane Application – Laundry Wastewater Treatment

Last Updated on July 27, 2022 by Kevin Chen

Washing wastewater is generated from bedding, work clothes, medical linen, and functional surgical linen and contains a small amount of domestic sewage. It mainly includes pre-washing sewage, main washing sewage, and drying sewage.

It has the following characteristics: the washing sewage contains surfactants, carboxymethyl vitamins, oil stains, dust particles, and various microorganisms. It has a turbid appearance containing many short fibers, bacteria, viruses, and other potentially infectious bacteria.

Case 1: Laundry Wastewater Treatment

The project mainly deals with the laundry wastewater generated by cleaning the plant’s bedding, work clothes, and functional surgical linen.

Characteristics of sewage treated in this project: the wastewater mainly contains detergents. The effective components of detergents are surfactants, detergents, bleach, and other auxiliary components. Washing wastewater contains a large number of short fibers, and aeration will produce a large number of bubbles. The average value of CODCr is low, but the CODcr value of main washing wastewater is high; the wastewater is turbid, and the color changes with the depth of the washing product; Different from ordinary laundry wastewater, the project mainly serves medical institutions. The wastewater contains infectious bacteria such as bacteria and viruses.

MBR Membrane Application - Laundry Wastewater Treatment

MBR Project Overview

LocationShanghai city, China
Type of WastewaterMedical laundry wastewater
Flow600 m³/d
CommissionedSince Sept. 2018 ( SPERTA MBR Membrane)

MBR Process Flow Chart

Case 1 Laundry Wastewater Treatment

Influent Condition and Effluent Quality

IndexInfluent ConditionDesigned EffluentActual Effluent
CODCr(mg/L)≤400≤5037
BOD5(mg/L)≤120≤2517
SS(mg/L)≤250≤102.5
Chroma (degrees)≤200≤2010
pH6~96~97~9
Turbidity(NTU)≤30≤50.6
Escherichia Coli (PCs. / L)—-1500—-

Case 2: Laundry Wastewater Treatment

The project mainly deals with the washing sewage of quilt covers, bed sheets, pillowcases, headrest pieces, and other personal items on all high-speed trains, bullet trains, and ordinary speed trains from Wuhan Railway Bureau and Wuhan three railway stations.

The sewage characteristics of this project are: the wastewater contains a lot of short fibers, a large number of laundry powder foam, the CODCr value is higher, the wastewater is turbid, and sometimes it has a very deep color. The wastewater is large and has a small amount of foam, which contains less suspended matter and a smaller CODCr value. The amount of waste water drained is small, and the water quality is slightly better than that of cleaning wastewater.

MBR Project Overview

LocationWuhan City, Hubei Province, China
Type of WastewaterLaundry wastewater
Flow600 m³/d
CommissionedSince Nov. 2021 ( SPERTA MBR Membrane)

MBR Process Flow Chart

Case 2 Laundry Wastewater Treatment

Influent Condition and Effluent Quality

IndexInfluent ConditionDesigned EffluentActual Effluent
CODCr(mg/L)≤209≤5016
BOD5(mg/L)≤93.5≤255.4
SS(mg/L)≤40≤101.3
Chroma (degrees)≤9≤203
pH6~96~97~8
Turbidity(NTU)≤16≤50.8
Escherichia Coli (PCs. / L)—-1500—-
Kevin Chen

Kevin Chen

Hi, I'm the author of this post, and I have been in this field for more than 5 years. If you want to wholesale MBR membrane or water treatment related product, feel free to ask me any questions.

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