Hong, SW Choi, YS Kwon, G Park, KY 2024-01-21T04:08:20Z 2024-01-21T04:08:20Z 2021-09-04 2005-11 0273-1223 https://pubs.kist.re.kr/handle/201004/136018 The use of a combination of biological and physicochemical methods is a promising technique to reduce highly concentrated pollutants in livestock wastewater: firstly, biodegradable organic matters, nitrogen and a part of phosphorus should be removed in a biological treatment process and then residual non-biodegradable organic matters, color and phosphorus be eliminated by physicochemical methods. In this study, therefore, the integrations of chemical coagulation, activated carbon adsorption, Fenton oxidation and ozonation were evaluated to provide an appropriate post-treatment process for biologically pre-treated livestock wastewater. With applying a single method such as coagulation and Fenton oxidation, a yellowish brown color and COD still remained. According to the experimental result, the quality of treated wastewater including color was enough to be discharged after chemical coagulation followed by ozonation or Fenton oxidation process. Among these, ozonation was the most effective technology for decolorization. Neither simple biological nor physicochemical process provides an adequate treatability for the sufficient depletion of organics and decolorization when treating livestock wastewater. Considering only the removal efficiency, the integration of Fenton oxidation and ozonation would be an efficient alternative as a post-treatment. English IWA PUBLISHING Performance evaluation of physicochemical processes for biologically pre-treated livestock wastewater Article 10.2166/wst.2005.0684 1 WATER SCIENCE AND TECHNOLOGY, v.52, no.10-11, pp.107 - 115 WATER SCIENCE AND TECHNOLOGY 52 10-11 107 115 N scie scopus 000234617700012 Engineering, Environmental Environmental Sciences Water Resources Engineering Environmental Sciences & Ecology Water Resources Article; Proceedings Paper COAGULATION OXIDATION DECOLORIZATION DEGRADATION OZONATION REMOVAL REAGENT biologically pre-treated decolorization livestock wastewater non-biodegradable organics physicochemical process