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水醒化鐵戀ii觸波에서 空氣醒化에 의한 金屬이온의 Ferrite 生成에 관한 冊究
李盛鎬(Sung Ho Lee),玄龍範(Yong Bum Hyun),金秀生(Soo Saeng Kim) 한국환경보건학회 1986 한국환경보건학회지 Vol.12 No.1
This investigation was carried out on the study of Ferrite formation by aerial oxidation of Fe (OH)2 suspension of aqueous solution containing heavy metal ions. In this study the optimum reactionary condition of the Ferrite formation in Batch reactor wa studied by aerial oxidation which are subjected to various reaction time and temperature, under the different kinds of R(2NaOH/FeS04) Values, pH, Air flow rate, and Fe2 +/M2 + mole ratio. The optimum condition for the Ferrite formation in Batch reactor was such that residence Time was 90 min., Temperature 650 C, pH 11.0, Air flow rate 2.01/min and Fe2 + 1M2 + mole ratio 4.0, which was observed by X-Ray diffraction analysis. The relation R-value, pH and ORP affecting the formation of Ferrite is that the jump step in pH 11.0, when a amount of NaOH is added, is steady state to the formation of Ferrite. Effect of R-value of FeS04 and FeC1 2 on the formation of Ferrite in different fron. ach other the optimum condition of the in different from each other the optimum condition of the FeCl2 is R-value 0.7, pH 11.0 and the FeS04 R-value 1.2, pH 11.0.
안철우 ( Chul Woo Ahn ),이철승 ( Chul Seung Lee ),서종환 ( Jong Hwan Seo ),박진식 ( Jin Sik Park ),문추연 ( Choo Yeon Moon ),장성호 ( Seong Ho Jang ),김수생 ( Soo Seang Kim ) 한국환경농학회 2004 한국환경농학회지 Vol.23 No.4
This study showed that thermophilic anaerobic acid fermentation of food wastes had an enhanced hydrolysis capability and improvement of acidification efficiency. Influence of pH on the anaerobic hydrolysis and acidogenesis was investigated to determine the proper alkalinity in the thermophilic fermentation of food wastes. The results of putting NaOH as alkali to evaluate hydrolysis and acid fermentation efficiency in acid fermentation process of food wastes showed that the food wastes pretreated with 0.05 g NaOH/g TS had the maximum 12,600 mg/L of VFAs concentration during HRT 3 days in 55℃ hermophilic condition and the maximum 9,700 mg/L of VFAs concentration during HRT 5 days in 35℃ mesophilic condition. The accomplishment of high VFAs concentration resulted from that the main component of food wastes such as cellulose, lignin and etc. is performed active chemical decomposition by alkali in thermophilic condition. The major components of VFAs produced from the thermophilic acid fermentation process of food wastes were the short chain fatty acids such as acetic acid, butyric acid, and propionic acid.