Study on the Biodegradability of Oxidized Sulfiting Rapeseed Oil Fatliquor
The methods of BOD5/CODCr, respiratory curve and COD30 were adopted to evaluate the biodegradability of oxidized sulfiting rapeseed oil fatliquor. The results showed that when the concentrations of the substrate were 250 mg/L and 500mg/L, the dosage of unacclimated activated sludge was 300mg and pH was 7, the substrate was biodegradable and the biodegradation rate was up to 90%. When unacclimated activated sludge was 300mg and pH was 7, the biodegradability of the substrate with the concentration of 1000mg/L became bad and the biodegradation rate was reduced to 80.9%. Moreover, the effect of pH, inoculation amount and salinity on the biodegradability of the substrate was obvious. The biodegradability of the substrate was the best when pH was 7 and alkaline medium had little influence on the biodegradability of the substrate. When the inoculation amount was increased to 1500mg/L, the biodegradation rate was also increased. The biodegradability of the substrate was inhibited when the external NaCl addition was 5% or 10%. The substrate could not be degraded when the external NaCl addition was 15%. The high salinity provided hyperosmolarity for microorganism, which caused microorganism cells dehydrate and activity inhibited. When the concentration of the substrate was 500mg/L, the ratio of BOD5/CODCr was increased from 0.30 to 0.46 under the optimum condition. The biodegradability of the substrate was excellent.
QIANG Taotao LUO Min WANG Xuechuan REN Yongqiang REN Longfang
Key Laboratory of Auxiliary Chemistry & Technology for Light Chemical Industry; Ministry of Education; Shaanxi University of Science and Technology: College of Resource and Environment, Xi’an, 710021, China
国际会议
2011 International Symposium on Environmental Science and Technology(2011 环境科学与技术国际会议 2011 ISEST)
广东东莞
英文
1016-1020
2011-06-01（万方平台首次上网日期，不代表论文的发表时间）