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Novel Composite Biogenic Flocculant

Technology Overview

Chemically-enhanced primary treatment (CEPT) process has been implemented as an alternative treatment process to the conventional process for domestic sewage. As large quantity of wastewater can be rapidly treated in this process, CEPT process is extremely useful for rapid growing mega cities and developing countries. The inorganic metal flocculants and organic polymers are generally used as pre-dewatering conditioning agents. However, the treatment process is either too expensive or poses ecological hazards. To alleviate concerns over the use of synthetic flocculants, biogenic flocculants are drawing increasing attention due to their satisfying flocculating effectiveness and safe biodegradable nature. The present invention provides a novel composite biogenic flocculant using non-hazardous and low-cost commercially available chemicals, naturally occurring microbes and renewable waste materials. The present method of manufacturing a composite biogenic flocculant involves the use of autotrophic and organotrophic bacteria and less expensive divalent iron source. The composite biogenic flocculant greatly improves the sludge dewaterability.

Technology Features & Specifications

The present method of manufacturing a composite biogenic flocculant involves the use of autotrophic and organotrophic bacteria and less expensive divalent iron source. The composite biogenic flocculant greatly improves the sludge dewaterability. The technology features include: • efficient and economical microbial method for the removal of sludge-borne heavy metals; • effective in sludge dewatering process; and • low cost and environmental-friendly due to reutilization of waste materials.

Potential Applications

The present invention aims at solving issues related to wastewater treatment facilities by a method for rapid flocculation, and improving filterability and dewaterability of sewage sludge. More particularly, the invention provides a novel composite biogenic flocculant having a blend of different microbial consortia exhibiting multifunctional activities that enhances the sludge dewaterability and using the composite biogenic flocculant for rapid flocculation, and improving the filterability and dewaterability of sewage sludge.

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