You may know about ultrafiltration membranes, so what makes QUA’s QSEP ultrafiltration membranes unique? In short, QSEP UF membranes offer high quality filtration, better availability and reliability at a lower capex and opex to consumers. Ultrafiltration (UF) is a membrane process used to remove suspended solids, colloidal matter, high molecular-weight substances, bacteria and viruses from various feed water sources. UF membranes can achieve a low and consistent silt density index (SDI) and are often used as pretreatment for reverse osmosis using surface water, seawater and biologically treated wastewater as feed source.
Project Overview
QUA’s QSEP technology has been utilize to complete a project for the Chhatrapati Shivaji International Airport located in Mumbai, India. Due to increasingly strict environmental regulations, the treatment of raw sewage wastewater is required before it is allowed to flow into the natural ecological system. As the airport has a lack of fresh water availability for its needs, it now recycles and reuses the treated sewage water for its operations, such as toilet flushing, horticulture, and HVAC cooling makeup water.
One unique and challenging aspect of the wastewater recycle plant project was that the plant must cover a very limited footprint in order to accommodate all needed components of the airport expansion project. The plant successfully met this small footprint requirement due to innovative engineering designs. QUA’s Q-SEP modules successfully fit the plant’s requirements due to their large surface area and high operating efficiency. The ultrafiltration system follows a Sequencing Batch Reactor (SBR) process and precedes a reverse osmosis treatment system for tertiary treatment.
QUA Solution
Location: Mumbai International Airport, Mumbai, India
Product: Q-SEP 6008
Capacity: 3 x 440 gpm (3 x 100 m³/hr)
UF Product Water: Turbidity < 0.04 NTU, SDI < 3
Application: Sewage Wastewater Recycle
Ultrafiltration was selected as the pretreatment of choice to the RO plant. QUA’s Q-SEP was specifically chosen as the ultrafiltration solution for the MIAL project due to its high water quality output compared to other UF membrane suppliers. The ultrafiltration system consists of three trains operating at a flow rate of 440 gpm each and with a backwash flux of 200 l/m2/hr. The chemical enhanced backwash (CEB) is designed to use sodium hypochlorite, sodium hydroxide and hydrochloric acid. The backwash and CEB system is common for all the UF streams.
Since its installation, the Q-SEP system at Mumbai International Airport has been running successfully and providing low turbidity water to the RO unit and meeting the requirement of the airport’s needs.
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