Abstract
An efficient adsorbent which can resolve the existing limitations of a biobed is of concern. In the present study, a composite is prepared by mixing and pyrolyzing clay and plant parts. This is finally converted to clay biochar composite with enhanced porosity and adsorption capacity. Composite consists of clay with sawdust or clay with powdered dry fruit of Acacia concinna. Among the different composites employed, clay/Acacia concinna (7.6/0.4) with higher structural stability was used as the biomix for biobed. The clay biochar composite (20%) bioaugmented with biosurfactant producing bacterial consortium was then mixed with sandy clay loam soil in a laboratory-scale biobed system. The study showed a COD removal of 95% and cypermethrin removal of 98%. Biodegradation of cypermethrin isomers in soil and clay biochar composite was observed. The study revealed that clay biochar composite amended with biosurfactant producing bacterial consortium is an efficient biomix for the biobed system.
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