摘要
B/C比值法是目前最常用的评价废水可生化性的方法,然而该方法测定周期较长,测定结果易受各种因素影响而产生误差,而微生物呼吸速率法操作简单、测定周期短,但相较于B/C比值法无数据上的直观性。采用BioWin软件模拟微生物呼吸速率测试,通过控制原水COD、混合液污泥浓度、原水B/C比值,探究微生物呼吸速率和B/C比值之间的相关性,以期通过测定废水的呼吸速率替代B/C比值法。模拟结果表明:当废水ρ(COD)<200mg/L,混合液污泥浓度控制在200~250mg/L时,比相对呼吸速率与B/C比值之间具有良好的线性关系,且根据拟合公式,进一步可得出比相对呼吸速率和废水可生化性程度之间的关系,为用微生物呼吸速率法判断废水可生化性提供参考依据。
B/C ratio is one of the most commonly used methods to evaluate the biodegradability of wastewater,but the measurement is time-consuming,and the results are easily affected by various factors. By contrast,the procedures for microbial respiration rate measurement are simpler and take less time,but the data are less intuitive. In this study,microbial respiration rate was simulated using BioWin software. Correlation between microbial respiration rate and B/C ratio was investigated by adjusting COD of raw wastewater,mixed liquid suspended solids,and B/C ratio,in order to using microbial respiration rate instead of B/C ratio for estimating the biodegradability of wastewater. The results showed that the specific respiration rate linearly correlated well with B/C ratio when the COD concentration was below 200 mg/L and the mixed liquid suspended solids was kept in the range of 200 ~ 250 mg/L. Furthermore,the relationship between the specific respiration rate and biodegradability of wastewater was explored. This work provided evidences for determining biodegradability of wastewater using microbial respiration rate.
出处
《环境工程》
CAS
CSCD
北大核心
2017年第12期1-5,50,共6页
Environmental Engineering
基金
五孔支撑结构中空纤维膜在MBR内的传质特性及通量衰减机理研究(51508082).
