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首页> 美国卫生研究院文献>BioMed Research International >Anaerobic Codigestion of Municipal Wastewater Treatment Plant Sludge with Food Waste: A Case Study
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Anaerobic Codigestion of Municipal Wastewater Treatment Plant Sludge with Food Waste: A Case Study

机译：市政废水处理厂污泥与餐厨垃圾厌氧消化的案例研究

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摘要

The aim of this study was to assess the effects of the codigestion of food manufacturing and processing wastes (FW) with sewage sludge (SS), that is, municipal wastewater treatment plant primary sludge and waste activated sludge. Bench scale mesophilic anaerobic reactors were fed intermittently with varying ratio of SS and FW and operated at a hydraulic retention time of 20 days and organic loading of 2.0 kg TS/m3·d. The specific biogas production (SBP) increased by 25% to 50% with the addition of 1%–5% FW to SS which is significantly higher than the SBP from SS of 284 ± 9.7 mLN/g VS added. Although the TS, VS, and tCOD removal slightly increased, the biogas yield and methane content improved significantly and no inhibitory effects were observed as indicated by the stable pH throughout the experiment. Metal screening of the digestate suggested the biosolids meet the guidelines for use as a soil conditioner. Batch biochemical methane potential tests at different ratios of SS : FW were used to determine the optimum ratio using surface model analysis. The results showed that up to 47-48% FW can be codigested with SS. Overall these results confirm that codigestion has great potential in improving the methane yield of SS.
机译：这项研究的目的是评估食品制造和加工废物（FW）与污水污泥（SS）共同消化的效果，即市政污水处理厂的初级污泥和废物活性污泥。向台式中温厌氧厌氧反应器间歇进料，改变SS和FW的比例，并在20天水力停留时间和2.0 organickg TS / m 3 ·d的有机负荷下运行。通过向SS添加1％-5％的FW，比沼气产量（SBP）增加了25％至50％，这明显高于从SS添加284±9.7 mLN / g VS的SBP。尽管TS，VS和tCOD的去除率略有提高，但沼气产量和甲烷含量均显着提高，并且在整个实验过程中，稳定的pH值均未观察到抑制作用。对消化物进行金属筛选表明，生物固体符合用作土壤改良剂的准则。使用表面模型分析，以不同的SS：FW比例进行分批生化甲烷潜力测试，以确定最佳比例。结果表明，SS可以共同消化多达47-48％的FW。总体而言，这些结果证实了共消化在提高SS甲烷产率方面具有巨大潜力。

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