Accelerated hydrolysis and acidification of municipal solid waste (MSW) in a flushing anaerobic bio-reactor using treated leachate recirculation
Accelerated hydrolysis and acidification of municipal solid waste (MSW) in a flushing anaerobic bio-reactor using treated leachate recirculation
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使用处理过的渗滤液再循环在冲洗式厌氧生物反应器中加速城市固体废物 (MSW) 的水解和酸化
DOI：
10.1177/0734242x0001800303
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发表时间：
2000
影响因子：
3.9
通讯作者：
C. Banks
中科院分区：
文献类型：
--
作者：
Z. Wang;C. Banks
采用传统的单程反应器（SPR）和两段厌氧-好氧工艺对城市生活垃圾（OFMSW）中有机组分的厌氧消化效果进行了比较。两阶段系统的第一阶段使用厌氧水力冲洗反应器（HFR），其中固体和液体停留时间通过系统内固体的保留而解耦。水力冲洗的目的是从厌氧反应器中快速冲洗出发酵中间体，从而防止它们的积累;这些中间体随后在第二阶段好氧活性污泥系统中去除，然后将其流出物用作第一阶段的冲洗液。水力冲洗反应器在2、3和4天的水力（液体）保留时间下操作，固体保留时间为30、25、20、15、10和5天。在所有情况下，进料中的总固体含量为10%，反应器的装载速率为3至21 kg总固体/m3天;在单程反应器中使用相同的装载范围。在高负载下，SPR系统显示挥发性脂肪酸的积累，峰值为13000 mg 1-1，这导致工艺失败和固体破坏的停止。在相同的工艺负荷下，当使用高水力冲洗速率时，HFR系统的固体破坏速率仅略有下降。
The efficiency of anaerobic digestion for reducing the solid content of the organic fraction of municipal solid waste (OFMSW) was compared using a conventional single pass reactor (SPR) and a two stage anaerobic-aerobic process. The first stage of the two stage system used an anaerobic hydraulic flush reactor (HFR) in which the solids and liquid retention times were decoupled by retention of solids within the system. The purpose of the hydraulic flush was to wash out rapidly the fermentation intermediates from the anaerobic reactor and thus prevent their accumulation; these were subsequently removed in the second stage aerobic activated sludge system, the effluent from which was then used as the flush liquor to the first stage. The hydraulic flush reactor was operated at hydraulic (liquid) retention times of 2, 3 and 4 days with solids retention times of 30, 25, 20, 15, 10 and 5 days. In all cases the total solid content in the feed was 10% giving loading rates to the reactor in the range 3 to 21 kg total solids per m3 day; this same loading range was used in the single pass reactor. At high loadings the SPR system showed an accumulation of volatile fatty acids, peaking at 13000 mg 1-1, which resulted in process failure and cessation of solids destruction. At the same process loadings the HFR system showed only a slight decline in the rate of solids destruction when using a high hydraulic flush rate.