SEMBAS is a biotechnology based effluent treatment system. The use of microbial consortia is the unique feature of SEMBAS whereby, there is negligible usage of power or mechanical parts. The advantage is almost no operational cost and the whole system becomes cost effective for both small scale and large-scale projects. SEMBAS is highly effective on stringent effluents and common effluent treatment plants. It offers a novel technology of immobilization of cells and combines microbiology and bioengineering to provide safe, eco-friendly and cost-effective solutions to the effluent treatment and pollution problems.