Hong S W, Choi Y S, Kwon G, Park K Y
Water Environment & Remediation Centre, Korea Institute of Science & Technology, P.O. Box 131, Cheongryang, Seoul 130-650, Korea.
Water Sci Technol. 2005;52(10-11):107-15.
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.
首先，在生物处理过程中应去除可生物降解的有机物、氮和部分磷，然后通过物理化学方法去除残留的不可生物降解的有机物、颜色和磷。因此，在本研究中，对化学混凝、活性炭吸附、芬顿氧化和臭氧氧化的组合进行了评估，以提供一种适合对经过生物预处理的畜禽废水进行后处理的工艺。采用单一方法如混凝和芬顿氧化时，仍会残留黄褐色和化学需氧量。根据实验结果，经过化学混凝后再进行臭氧氧化或芬顿氧化处理后，包括颜色在内的处理后废水质量足以排放。其中，臭氧氧化是最有效的脱色技术。在处理畜禽废水时，单纯的生物或物理化学过程都不能为有机物的充分去除和脱色提供足够的处理能力。仅考虑去除效率，芬顿氧化和臭氧氧化的组合作为后处理将是一种有效的选择。
