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MBR Membrane Application - Expressway Wastewater Treatment

MBR Membrane Application – Expressway Wastewater Treatment

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Last Updated on August 25, 2022 by Kevin Chen

The sewage in the expressway service area mainly comes from toilet water, flushing wastewater, catering wastewater, cleaning water, etc. Affected by weather, season, time, and some other special conditions, the traffic flow will be very random, leading to low-load operation of the influent water quality.

During holidays, the water volume fluctuates greatly, especially in the toilets and showers, which leads to high concentrations of ammonia, nitrogen, and SS in the sewage in the service area, and the water volume may vary every hour, every day, day and night. The urban sewage pipe network cannot be arranged by geographical location, and the discharge standard must meet the first-class A standard in the “Pollutant Discharge Standard for Urban Sewage Treatment Plants” (GB18918-2002).

The below 2 cases provide an overview of the MBR membrane application for the expressway wastewater treatment process, including how it works and its benefits.

Case 1: Expressway Wastewater Treatment – Xinxiang Service Station

The project mainly deals with toilet water, flushing wastewater, catering wastewater, and cleaning water generated in the service station of Henan Xinxiang expressway. The sewage treatment capacity is 150m3/d, and the treated effluent meets standard A in class I in the discharge standard of pollutants for urban sewage treatment plants (GB18918-2002).

The sewage has high organic matter concentration, large water quality, quantity fluctuation, and strong biodegradability. The main pollutants are suspended solids, hydrocarbons, proteins, animal and vegetable oils, nitrogen and phosphorus compounds, surfactants, microorganisms, and inorganic salts.

MBR Membrane Application - Expressway Wastewater Treatment III

MBR Project Overview

LocationXinxiang Service Station, Henan Province, China
Type of WastewaterDomestic Wastewater
Flow150 m³/d
CommissionedSince June. 2019 ( SPERTA MBR Membrane )

MBR Process Flow Chart

Case 1 Expressway Service Station Wastewater Treatment

Influent Condition and Effluent Quality

IndexInfluent ConditionDesigned EffluentActual Effluent
CODCr(mg/L)≤450≤5037
BOD5(mg/L)≤280≤107
SS(mg/L)≤280≤102.5
Ammonia Nitrogen(mg/L)≤60≤53
pH6~96~96~8
TP≤8≤0.50.3
TN≤80≤159

Case 2: Expressway Wastewater Treatment – Zhenping Service Station

The raw water of this project is the domestic wastewater and toilet flushing sewage generated in the service station of Zhenping Expressway in Henan Province. The sewage treatment capacity is 100m3/d, and the treated effluent meets the grade A requirement in the discharge standard of pollutants for urban sewage treatment plants (GB18918-2002).

Characteristics of the sewage treated in this project: It will be bound to seriously affect the surrounding environment if there is no effective treatment that the sewage is high in organic substances, bacteria, etc. The raw water is complex with high ammonia nitrogen-containing and mostly in “low load” operation. Still, its volume fluctuates greatly during holidays due to its location at the service station.

MBR Membrane Application - Expressway Wastewater Treatment I

MBR Project Overview

LocationZhenping Service Station, Henan Province, China
Type of WastewaterDomestic Wastewater
Flow100 m³/d
CommissionedSince June. 2019 ( SPERTA MBR Membrane )

MBR Process Flow Chart

Case 2 Expressway Service Station Wastewater Treatment

Influent Condition and Effluent Quality

IndexInfluent ConditionDesigned EffluentActual Effluent
CODCr(mg/L)≤400≤5037
BOD5(mg/L)≤250≤107
SS(mg/L)≤250≤102.5
Ammonia Nitrogen(mg/L)≤50≤53
pH6~96~97~9
TP≤6≤0.50.2
TN≤60≤157
Kevin Chen

Kevin Chen

Hi, I'm the author of this post and have been in this field for over 5 years. If you have questions regarding the MBR membrane products or want to purchase the MBR membrane, please feel free to contact me by email. kevin@spertasystems.com

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