Applications of Open Channel Membrane Modules to Treat and Reuse Wastewater
DOI:
https://doi.org/10.6000/1929-6037.2014.03.01.2Keywords:
Reverse osmosis, open channel membrane module, wastewater reuse, domestic wastewater, storm water, ammonia reduction, oil reduction, car wash effluentsAbstract
Local utilities often face problems of domestic wastewater, local industrial wastes, storm water disposal due to existing strict regulations. For many local industries, the problem of wastewater treatment and discharge into surface reservoirs can’t be solved through the use of conventional biological treatment techniques. Current discharge standards require very strict removal of a number of impurities such as ammonia, nitrates, phosphate, etc. To reach this level of removal, modern modified biological treatment facilities (membrane bioreactors etc.) are used.
This article suggests a new technical approach to treat directly domestic wastewater and storm water to completely reuse them for technical needs.
The modern concept of rational water resources management requires the development of new efficient techniques that provide wastewater treatment and reuse.
As RO membranes simultaneously reject all dissolved impurities such as BOD, TDS, ammonia, phosphates etc., they become very attractive for the direct treatment of wastewater without biological stage. To treat wastewater, specially designed membrane "open channel" modules are used that do not possess "dead areas" that cause fouling or require pretreatment. A solution to RO concentrate disposal problem is presented that consists of reducing of initial wastewater volume by 100 times. Concentrate is withdrawn from membrane unit as sludge moisture. The efficient use of membrane RO techniques is connected with a salt balance in water system. Thus, to provide high ecological efficiency of developed techniques, all components of water supply and wastewater discharge systems should be accounted for.
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