Wang J Y, Xu H L, Tay J H
Environmental Engineering Research Centre, School of Civil and Environmental Engineering, Nanyang Technological University, Blk. N1, 50 Nanyang Avenue, Singapore 639798.
Water Sci Technol. 2002;45(12):159-65.
A hybrid two-phase system, consisting of a solid waste reactor as the acidification reactor and a wastewater reactor, i.e. an upflow anaerobic sludge blanket (UASB) reactor, as the methanogenic reactor, for anaerobic digestion of food waste was investigated. After the pre-acidification stage, COD and total VFA removals in the methanogenic phase were in the ranges of 74-93% and 77-100%, respectively, while leachate COD and total VFA concentrations in the acidification phase decreased by 95% and 97-99%, respectively. Some 99% of the total CH4 generated was from the methanogenic phase with the CH4 content of 68-70%. About 77-79% of TOC, 57-60% of volatile solids and 79-80% of total COD were removed. The results of this laboratory-scale study show that the hybrid two-phase anaerobic batch reactor system is suitable for effective conversion of food waste into CH4 and CO2. The hybrid two-phase system can be further developed into an effective and efficient way to enhance waste stabilization in operating bioreactor landfills.
研究了一种混合两相系统，该系统由作为酸化反应器的固体废物反应器和作为产甲烷反应器的废水反应器（即上流式厌氧污泥床（UASB）反应器）组成，用于食物垃圾的厌氧消化。在预酸化阶段之后，产甲烷阶段的化学需氧量（COD）和总挥发性脂肪酸（VFA）去除率分别在74% - 93%和77% - 100%的范围内，而酸化阶段渗滤液的COD和总VFA浓度分别下降了95%和97% - 99%。产生的总甲烷中约99%来自产甲烷阶段，甲烷含量为68% - 70%。约77% - 79%的总有机碳（TOC）、57% - 60%的挥发性固体和79% - 80%的总COD被去除。该实验室规模研究的结果表明，混合两相厌氧间歇反应器系统适用于将食物垃圾有效转化为甲烷和二氧化碳。混合两相系统可进一步发展成为一种有效且高效的方法，以增强运行中的生物反应器填埋场的废物稳定化。
