Experimental Study of Increase of Biogas Production from Lagoon Station's Sludge by Alkaline Pretreatment

IF 4 4区环境科学与生态学 Q2 ENVIRONMENTAL STUDIES Energy & Environment Pub Date : 2023-08-01 DOI:10.1177/0958305X221088569

Mohamed El Amine Dahou, Mohammed Hadj Kouider, Siham Dehmani, A. Habchi, Said Slimani

引用次数: 0

Abstract

The present research focuses on the experimental study of the effect of alkaline pretreatment with NaOH on biogas production. Different concentrations of NaOH, i.e. 1, 2.5 and 5% (w/w), were tested on the lagoon station's sludge (dry basis) at room temperature for 24 h. The results obtained after 60 days of digestion, through the cumulative volume of biogas recorded, clearly indicate a positive effect of the chemical alkaline pretreatment on the anaerobic digestion since the amount of biogas produced increased by 42.6% when the NaOH concentration was close to 2.5%. This concentration is considered optimal under the chosen conditions. Indeed, inhibition of the methanogenic activity and a blockage of the digestion process are observed beyond this concentration. These results suggest that the alkaline pretreatment can improve the energy efficiency of the obtained biogas (CH4 content) and reduce the residence time.

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碱预处理提高泻湖站污泥沼气产量的试验研究

本文主要研究了氢氧化钠碱预处理对沼气生产的影响。在泻湖站污泥(干基)上进行不同浓度NaOH(1、2.5、5%)常温下24 h的试验，60 d消化后的结果，通过记录沼气累积量，清楚地表明化学碱预处理对厌氧消化的积极作用，NaOH浓度接近2.5%时，沼气产量增加了42.6%。在选定的条件下，这个浓度被认为是最佳的。事实上，在这个浓度之外，可以观察到产甲烷活性的抑制和消化过程的阻塞。综上所述，碱法预处理可提高所得沼气的能量利用率(CH4含量)，缩短停留时间。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Energy & Environment ENVIRONMENTAL STUDIES-

CiteScore

7.60

自引率

7.10%

发文量

157

期刊介绍： Energy & Environment is an interdisciplinary journal inviting energy policy analysts, natural scientists and engineers, as well as lawyers and economists to contribute to mutual understanding and learning, believing that better communication between experts will enhance the quality of policy, advance social well-being and help to reduce conflict. The journal encourages dialogue between the social sciences as energy demand and supply are observed and analysed with reference to politics of policy-making and implementation. The rapidly evolving social and environmental impacts of energy supply, transport, production and use at all levels require contribution from many disciplines if policy is to be effective. In particular E & E invite contributions from the study of policy delivery, ultimately more important than policy formation. The geopolitics of energy are also important, as are the impacts of environmental regulations and advancing technologies on national and local politics, and even global energy politics. Energy & Environment is a forum for constructive, professional information sharing, as well as debate across disciplines and professions, including the financial sector. Mathematical articles are outside the scope of Energy & Environment. The broader policy implications of submitted research should be addressed and environmental implications, not just emission quantities, be discussed with reference to scientific assumptions. This applies especially to technical papers based on arguments suggested by other disciplines, funding bodies or directly by policy-makers.