Abstract

 The rapid growth of the population, the technological and industrial boom has brought enormous problems and degradation of the environment. Effective collection and treatment of urban wastewater is a critical problem in a developing country like India. This paper presents a review of decentralized approaches to waste water treatment and management using “Membrane bio-reactor”. Make wastewater treatment facilities people centric and an approach towards “waste to resource. Cluster system seems good approach to waste water treatment in terms of sanitation and environmental protection. Need of modification in traditional decentralized system is required, where effluent quality of a septic tank is improved by the use of advance treatment approach like membrane bio-reactor. Advantages of the same are easier for management in term of operation, maintenance and effluent quality. However, centralized system not only require large land area but also high in operation and maintenance cost. Decentralized wastewater systems (DEWATS) allow flexibility in wastewater management and different parts of the system may be combined into “treatment trains,” or a series of processes to meet treatment goals, overcome site conditions, and to address environmental protection requirements.

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