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首页> 外文期刊>Energy Conversion & Management >Effect of VS organic loads and buckwheat husk on methane production by anaerobic co-digestion of primary sludge and wheat straw
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Effect of VS organic loads and buckwheat husk on methane production by anaerobic co-digestion of primary sludge and wheat straw

机译：VS有机负荷和荞麦皮对主污泥和麦草厌氧共消化对甲烷生产的影响

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An environmentally acceptable disposal of sewage sludge and agro-wastes presents an urgent problem facing many countries. Anaerobic digestion (AD) is a robust and suitable technique for producing renewable energy from wastes. This study aims to improve methane production from anaerobic co-digestion of primary sludge (PS) and wheat straw (WS) depending on their volatile solids (VS) organic load and by adding a proposed waste material of buckwheat husk (BH) based on their carbon to nitrogen (C/N) ratio. Mesophilic anaerobic batch tests were carried out in 500-mL digesters. Individual and six mixtures of PS and WS at different VS organic loads were anaerobically digested to optimize VS load for the greatest gas production. The highest cumulative methane yield (CMYs) occurred with combined substrates at a VS load of 7.50 gVS/L. In general, the optimized organic loads that gave the highest cumulative biogas yield (CBYs) and CMYs were in the range of 6-8 gVS/L. In addition, AD of individual substrates of PS, WS, and BH and of their mixture at different C/N ratios was investigated regarding to the methane yields. Multi-component substrates produced the greatest CMY at a C/N ratio of 10.07. The CMYs was increased by 39.26% when the proposed waste material of buckwheat husk (BH) was added to the different mixtures of PS and WS compared to the co-digestion of PS and WS. Experimental results were approved using statistical analysis by ANOVA test at P-value less than 0.05. Purification of methane and biodegradation of VS were evaluated. The results emphasized positive synergy of anaerobic co-digestion for improving CMY and best feedstock utilization. (C) 2016 Elsevier Ltd. All rights reserved.
机译：对环境下可接受的污水污泥和农业废料的处置提出了许多国家面临的紧迫问题。厌氧消化（AD）是一种从废物中产生可再生能源的稳健而合适的技术。这项研究的目的是根据主要污泥（PS）和麦秸（WS）的挥发性固体（VS）有机负荷进行厌氧共消化，并通过基于它们的拟议荞麦皮（BH）废料添加，提高厌氧消化甲烷的产量。碳氮比（C / N）。中温厌氧分批测试在500 mL蒸煮器中进行。厌氧消化不同VS有机负荷的PS和WS的单独混合物和六种混合物，以优化VS负荷，以最大程度地生产天然气。合并的底物在7.50 gVS / L的VS负载下出现最高的累积甲烷产量（CMYs）。通常，提供最高累积沼气产量（CBY）和CMY的优化有机负荷范围为6-8 gVS / L。此外，针对甲烷的收率，研究了PS，WS和BH的各个底物及其混合物在不同C / N比下的AD。多组分基材以10/07的C / N比产生了最大的CMY。与PS和WS共同消化相比，将拟议的荞麦皮废料（BH）添加到PS和WS的不同混合物中，CMYs增加了39.26％。实验结果通过ANOVA测试的统计分析获得批准，P值小于0.05。评估了甲烷的纯化和VS的生物降解。结果强调厌氧消化的积极协同作用，可提高CMY和最佳原料利用率。 （C）2016 Elsevier Ltd.保留所有权利。

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