The objective of this study was to assess the influence of moisture enhancement strategies on biodegradation of municipal solid waste (MSW) in laboratory-scale reactors. Moisture enhancement strategies were varied with respect to dose volume (40, 80, 160, and 320 L/Mg-MSW) and dose frequency (dosing every ½, 1, 2, and 4 weeks). Biodegradation was evaluated based on methane generation to assess (i) the lag-time between the start of liquid dosing and onset of methane generation and (ii) the first-order decay rate for methane generation. In general, the decay rate increased with an increase in dose volume for a given dose frequency. In addition, trends of increasing decay rate and decreasing lag-time were observed for an increase in dose frequency for reactors operated with dose volumes of 40, 80, and 160 L/Mg-MSW. A key conclusion from this study was that reactors with more aggressive moisture enhancement attained more rapid methane generation that initiated at shorter elapsed times following the onset of dosing. An assessment of liquid dosing per month indicated that there were more pronounced impacts of increasing decay rate and decreasing lag-time as moisture enhancement increased from 40 L/Mg-MSW/month to 320 L/Mg-MSW/month as compared to the impact on both variables for an increase in liquid dosing above 320 L/Mg-MSW/month.

这项研究的目的是评估增湿策略对实验室规模反应堆中城市固体废物（MSW）生物降解的影响。增湿策略在剂量体积（40、80、160和320 L / Mg-MSW）和剂量频率（每½，1、2和4周给药一次）方面有所不同。基于甲烷的产生来评估生物降解，以评估（i）液体加药开始与甲烷产生开始之间的滞后时间，以及（ii）甲烷产生的一级衰减率。通常，对于给定的剂量频率，衰减率随剂量体积的增加而增加。此外，对于剂量体积为40、80和160 L / Mg-MSW的反应堆，随着剂量频率的增加，观察到了衰减速率增加和滞后时间减少的趋势。这项研究的一个关键结论是，具有更强的水分增强作用的反应堆可以更快地产生甲烷，而甲烷的产生是在加药后的较短时间内开始的。每月对液体剂量的评估表明，随着水分增加量从40 L / Mg-MSW /月增加到320 L / Mg-MSW /月，衰减率增加和滞后时间减少的影响更加明显。在这两个变量上，用于增加液体剂量超过320 L / Mg-MSW /月。