摘要
以葡萄糖为底物,采用10 L完全混合式反应器研究了进水COD为1 000、1 500和2 000mg/L条件下水力停留时间对出水中溶解性微生物产物(SMP)的量、分子量分布和组成成分的影响。在进水COD相同条件下,溶解性微生物产物的量随着水力停留时间延长呈下降趋势。水力停留时间相同时,进水COD越高产生的溶解性微生物产物的量越多。随水力停留时间的延长,小分子量(Mr<1×103)部分溶解性微生物产物所占百分比呈现先减小后增加的趋势;中间分子量(1×103<Mr<1×104)部分呈现先增加后减小的趋势;大分子量(Mr>1×104)部分则逐渐减小。水力停留时间对溶解性微生物产物中的多聚糖和蛋白质含量有显著影响,对DNA含量没有显著影响。随着水力停留时间的延长,多聚糖和蛋白质能够逐渐降解。
In 10 L aerobic completely stirred tank reactor, the effect of hydraulic retention time （HRT） on the amount, molecular weight （Mr） distribution and components of soluble microbial products （SMP） in effluent was investigated under the three concentrations of influent COD of 1 000, 1 500 and 2 000 mg/L for the substrate of glucose. The amount of SMP manifested the trend of reduction with the prolongation of HRT at the same concentration of influent COD, and increased with the concentration of influent COD at the same HRT. With the longer HRT, the percentage of the low Mr fraction （Mr〈1 × 10^3） of SMP increased initially and then decreased, that of the medium Mr fraction （1 × 10^3 〈Mr〈1× 10^4） reversed the trend, and that of the high Mr fraction （Mr〉1× 10^4） reduced gradually. The HRT had considerable effect on the content of polysaccharide and protein in SMP, and had no considerable effect on that of DNA. With the prolongation of HRT, polysaccharide and protein degraded gradually.
出处
《华东理工大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第1期66-70,共5页
Journal of East China University of Science and Technology
基金
国家自然科学基金项目(50478068)
上海市重点学科建设项目(B506)
关键词
溶解性微生物产物
水力停留时间
完全混合式反应器
分子量分布
多聚糖
蛋白质
DNA
soluble microbial products
hydraulic retention time
completely stirred tank reactor
distribution of molecular weight
polysaccharide
protein
DNA
