Development for Use of Lees Materials

利用米皮防止活性污泥法中的膨胀对米皮在活性污泥法中防止膨胀的效果进行了评价。在食品厂曝气池中投加米皮后，污泥体积指数(SVI)有所下降。BOD(生化需氧量)和COD(化学需氧量)均较添加米糠前有显著下降。米糠对有效微生物的生长有促进作用。结果是，米糠抑制了膨大引起的丝状菌的生长。从实验室规模的研究来看，米糠中的植酸有助于控制丝状菌的膨胀。在pH值为3~12的范围内，研究了米糠对水中一氯胺的去除效果。米皮对余氯的去除效果与活性碳相当。用AVER…成功地去除了一氯胺对于含氯量为0.22~0.46 mg/L的含氯污水，米皮处理90min后，除龄效率可达95%以上。米皮对一氯胺的去除主要是由于其与米皮的直接反应而分解的。本文报道了间歇式脱除一氯胺的实验室研究结果，并对其去除机理进行了阐述。研究发现，米皮对工业废水中的有机氯化合物和苯有较好的脱除效果，对二氯甲烷、氯仿、四氯化碳、三氯乙烯、四氯乙烯和苯等有机化合物有较好的吸附效果。平衡吸附等温线符合Freundlich等温式(对数-对数线性)。在pH为1~11的范围内，观察到米皮对二氯甲烷和氯仿的吸附。大米中的二氯甲烷浓度为0.006~100 mg/L，60min后脱氯率可达70%以上。米皮对这些有机氯化合物和苯的去除归因于被称为球体的细胞内颗粒的摄取。较少

Utilization of Rice Bran to Prevent Bulking in the Activated Sludge ProcessRice bran was evaluated for prevention of bulking in the activated sludge process. After addition of rice bran in the aeration tank of the food plant, a decrease in SVI(sludge volume index) was observed. Both BOD(biochemical oxygen demand) and COD (chemical oxygen demand) showed significant decreases relative to that before the addition of rice bran. Rice bran accelerated the growth of the effective microorganism. As a result, rice bran suppressed the growth of filamentous organisms caused in bulking. It was suggested that phytic acid in rice bran was useful for controlling filamentous bulking from laboratory scale investigations.Decomposition of Monochloramine from Water with Rice BranRemoval efficiency of monochloramine by rice bran was investigated over the range of pH 3-12. The removal rate of residual chlorine by rice bran was similar to activated carbon. Monochloramine was successfully removed with an aver … More age removal efficiency of 95% after 90 min when rice bran was applied to chlorinated sewage effluents that contained 0.22-0.46 mg/l monochloramine. The removal of monochloramine by rice bran was attributed to its decomposition by direct reaction with rice bran. Here, we report the findings of the efficiency of rice bran removal of monochloramine using the batch system in laboratory tests, and describe elucidation of the mechanism of its removal.Efficiency of Rice Bran for Removal of Organochlorine Compounds and Benzene from Industrial WastewaterRice bran was found to effectively adsorb several organic compounds, such as dichloromethane, chloroform, carbon tetrachloride, trichloroethylene, tetrachloroethylene and benzene. Equilibrium adsorption isotherms conformed to the Freundlich isotherm (log-log linear). Adsorption of dichloromethane and chloroform by rice bran was observed in the pH range 1-11. Dichloromethane was successfully removed from rice containing 0.006 to 100 mg/l to the extent of 70 % after 60 min. The removal of these organochlorine compounds and benzene by rice bran was attributed to the uptake by intracellular particles called spherosomes. Less