Wastewater treatment with biomass carriers made from steelmaking by-product
- Nippon Steel Corp., Chiba (Japan)
It is economical to use microorganisms in wastewater treatment. In steelmaking, ammonia liquor from coke-oven plant, for example, is treated using microorganisms. To treat wastewater efficiently in biological processes, the following conditions are necessary: appropriate conditions for activities of microorganisms; proper concentration of microorganisms in reactor; effective contact of wastewater and microorganisms; and reliable separation of treated wastewater and microorganisms. Three types of biomass carriers made from granulated slag to satisfy these conditions have been developed. Research efforts have been under way to apply these carriers in reduction of COD (chemical oxygen demand) in wastewater. Developed biomass carriers can reduce the volume of COD oxidation reactor and promise easy operation compared with the conventional activated sludge processes. This result has been substantialized in sewage treatment facilities, factory wastewater treatment facilities and deodorization facilities. For the future, nitrate reduction in stainless pickling wastewater with fixed-bed biomass carriers will be also investigated.
- OSTI ID:
- 118866
- Report Number(s):
- CONF-9509197-; ISSN 0021-1559; TRN: IM9546%%267
- Journal Information:
- Iron and Steel Engineer, Vol. 72, Issue 7; Conference: 1995 Association of Iron and Steel Engineers (AISE) annual convention, Pittsburgh, PA (United States), 25-28 Sep 1995; Other Information: PBD: Jul 1995
- Country of Publication:
- United States
- Language:
- English
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