Evaluation of Anaerobic Fluidized Bed Reactor for Treating High Strength Organic Wastewater

Evaluation of Anaerobic Fluidized Bed Reactor for Treating High Strength Organic Wastewater

Abstract:

Rapid industrializations and economic liberalizations have contributed to the accumulation of industrial pollutants in the environment. The influents from the industrial activities are considered to be hazardous to human life and environment. Conventional treatment technologies have not been adopted by various industries as they are not economically viable and technically feasible to achieve the required stringent standards set for the disposal of effluents on surface water bodies or on land.

Among the different anaerobic process available, an anaerobic down flow fluidized bed reactor emerge as a good alternative for the treatment of wastewater. In the classic case of fluidized systems, the solid particles have a higher density than the fluid. In down-flow (or inverse) fluidization, the liquid specific density is higher than the particle specific density, and the bed is expanded downward by the liquid flow.

Under the fluidized state, each media provides a large surface area for biofilm formation and growth. It enables the attainment of high reactor biomass hold-up and promotes the system efficiency and stability. This provides an opportunity for higher organic loading rates and greater resistance to inhibitors. Fluidized bed technology is more effective than anaerobic filter technology as it favours the transport of microbial cells from the bulk to the surface and thus enhances the contact between microorganisms and the substrate

Therefore it is possible to work at high organic loading rates and short hydraulic retention times in inverse anaerobic fluidized bed reactor. Hence this research project is to explore new technology for reducing the strength of the organic matter in industrial wastewater.


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