Investigation of Membrane Bioreactor (MBR) as an Effective Method in Wastewater Treatment

Document Type : Applied Article

Authors

• E Movahed ¹
• Aptin Rahnavard ²

¹ Azad University

² , Azad University,Department of Environment, Tonekabon, Iran

10.22067/jwsd.v7i1.79236

Abstract

Article Type: Applied
Nowadays, due to strict laws to prevent environmental pollution as well as the importance of recycling and reuse of effluent, the use of processes that can treat wastewater with high efficiency has received special attention. One of the biological and widely used mechanism of domestic and industrial sewage treatment is activated sludge which microorganisms break down organic matter in the sewage while consuming oxygen. The advantages of this method are simple design, simple guidance, optimal efficiency in organic matter removal and less sensitivity to seasonal variations in temperature. After demonstrating the proper performance of the activated sludge in the treatment of variety of sewages, various adjustments and changes were made to adapt this process to different requirements. The disadvantages of conventional activated sludge method are the need to relatively high electrical and mechanical equipment, operational problems, the need for relatively high space for the construction of the wastewater treatment plant and low efficiency in the separation of all suspended organic matter. Membrane bioreactor (MBR) is a method to solve the problems of activated sludge especially reducing the steps of the purification process (removal of sedimentation and disinfection) and increasing the efficiency of reducing organic pollutants. Despite the use of an active sludge reactor, the separation of sludge from water is done by a membrane microfiltration system. This system has been highly efficient for domestic and industrial wastewater treatment and has received special attention in recent years.
 

Keywords

• Microfiltration
• Ultrafiltration
• Membrane process

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