F/M对ASBR中基质的吸收、储存和利用影响

研究了不同F/M（COD/VSS）下以葡萄糖为基质时厌氧序批式反应器（ASBR）中的微生物代谢规律.结果表明，在序批操作条件下，水解产酸菌对葡萄糖的代谢存在2条并列的途径，即直接代谢为VFA和首先转化为胞内储存物糖原，然后糖原再被转化为VFA.前者约占进水COD的34%～38%，而后者则高达41%～46%.F/M越高，糖原的储存量越大，当F/M分别为0.27、 0.20和0.14时，单位质量污泥糖原的最大储存量分别为116.8、 81.1和62.4 mg/g.糖原的储存减缓了VFA的积累，为ASBR反应器的高效和正常运行创造了条件.

Effects of F/M on the Uptake, Storage and Utilization of Carbonhydrate in ASBR

Substrate utilization in a glucose-fed anaerobic sequencing batch reactor (ASBR) under different F/M ratios was investigated. Glucose added was quickly taken up by fermentation bacterial in anaerobic digestion, then partly degraded directly to volatile fatty acid (VFA, accounted for 34%_38% of COD-fed) and partly accumulated transiently in the cell as glycogen (accounted for 41%_46% of COD-fed) and degraded to VFA in the following. The bacterial accumulation capacities increased with F/M. The maximum specific storage capacities could reach as high as 116.8, 81.1 and 62.4 mg/g as F/M (COD/VSS) was controlled in 0.27, 0.20 and 0.14 respectively. VFA production rate slowed down due to glucose storage, which resulted in low VFA accumulation and guaranteed a stable operation in ASBR under high loading rate.