中山大学学报(自然科学版)2003，Vol.42Issue(4)：89-94,6.
厌气反应器对基质扰乱的响应
Responses of Anaerobic Reactors to Substrate Perturbations
摘要
Abstract
Five sets of perturbation experiments were conducted at 37 ℃ in three anaerobic complete-mix reactors treating wastewaters containing propionate,butyrate and mixed-fatty-acids,respectively. Perturbation was created by a pulse addition of either propionate,butyrate or formate. Results showed that the perturbation caused immediate concentration buildup of the corresponding acid and partial pressure of hydrogen (pH2). But all reactors were able to fully recover within 200 hours. The accumulation of propionate and butyrate was not severe enough to cause significant variation of pH in the mixed liquor. However,increase of pH2 suppressed conversion of propionate and butyrate; the respective threshold levels were 2.1×10-4 and 1.1×10-3atm. Isobutyrate,and two higher-molecular-weight carboxylic acids,valerate and caproate,were found in some reactor effluents after perturbation. Effect of pH2 on butyrate isomerization was inconclusive. Analysis of experimental data according to chemical thermodynamics showed that the formation of valerate and caproate could be either due to the increase pH2 or independent of pH2. In the latter case,the formation was directly due to the increase of propionate/butyrate concentrations in the mixed liquor.关键词
厌气/丁酸/氢/扰乱/丙酸/基质Key words
anaerobic/butyrate/hydrogen/perturbation/propionate/substrate分类
资源环境引用本文复制引用
贾晓珊,方汉平..厌气反应器对基质扰乱的响应[J].中山大学学报(自然科学版),2003,42(4):89-94,6.基金项目
香港RGC资助项目 （）
