Co-digestion of mushroom compost with switchgrass using solid–state anaerobic digester

IF 0.8 Q4 ENGINEERING, ENVIRONMENTAL

Proceedings of the Institution of Civil Engineers-Waste and Resource Management Pub Date : 2023-06-02 DOI:10.1680/jwarm.22.00009

R. Nair, A. Thalla, V. V. Nair

{"title":"Co-digestion of mushroom compost with switchgrass using solid–state anaerobic digester","authors":"R. Nair, A. Thalla, V. V. Nair","doi":"10.1680/jwarm.22.00009","DOIUrl":null,"url":null,"abstract":"Spent Mushroom Compost (SMC) already broken down into smaller particles by fungal action is an ideal material for producing biogas. Two cycles of five Solid State Anaerobic Digesters (SS-ADs) with different mix-ratio of SMC and Switchgrass (SG) were operated at feedstock-to-effluent ratio (F/E) of 2 at a temperature 35±2°C. The total solids concentration of the digester was kept at ∼17%. Initial biogas production observed during the start-up of the digester confirmed the presence of readily available extractives for digestion. In the first cycle, the highest methane yield was observed in SMC 0 (0% SMC + 100% SG) of 28.82 L/kg VS/d and the lowest yield was observed in SMC 4 (100% SMC + 0% SG) as 10.32 L/kg VS/d. The substrate containing 100% SG (SMC 0) recorded the highest cumulative biogas yield of 295.43 L/kg VS in 63 days. The digesters with higher SMC fraction showed lower methane production, low pH value, and high VFA content upon decomposition. The SS-ADs having SMC/SG of 50:50 showed more than 2 times methane production in comparison with SS-ADs having SMC as sole substrate. An estimation of volumetric productivity also established a linear relationship with the SMC/SG ratio.","PeriodicalId":45077,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Waste and Resource Management","volume":null,"pages":null},"PeriodicalIF":0.8000,"publicationDate":"2023-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings of the Institution of Civil Engineers-Waste and Resource Management","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1680/jwarm.22.00009","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, ENVIRONMENTAL","Score":null,"Total":0}

引用次数: 0

Abstract

Spent Mushroom Compost (SMC) already broken down into smaller particles by fungal action is an ideal material for producing biogas. Two cycles of five Solid State Anaerobic Digesters (SS-ADs) with different mix-ratio of SMC and Switchgrass (SG) were operated at feedstock-to-effluent ratio (F/E) of 2 at a temperature 35±2°C. The total solids concentration of the digester was kept at ∼17%. Initial biogas production observed during the start-up of the digester confirmed the presence of readily available extractives for digestion. In the first cycle, the highest methane yield was observed in SMC 0 (0% SMC + 100% SG) of 28.82 L/kg VS/d and the lowest yield was observed in SMC 4 (100% SMC + 0% SG) as 10.32 L/kg VS/d. The substrate containing 100% SG (SMC 0) recorded the highest cumulative biogas yield of 295.43 L/kg VS in 63 days. The digesters with higher SMC fraction showed lower methane production, low pH value, and high VFA content upon decomposition. The SS-ADs having SMC/SG of 50:50 showed more than 2 times methane production in comparison with SS-ADs having SMC as sole substrate. An estimation of volumetric productivity also established a linear relationship with the SMC/SG ratio.

查看原文本刊更多论文

利用固态厌氧沼气池对蘑菇堆肥与柳枝稷进行共消化

已被真菌分解成小颗粒的废蘑菇堆肥(SMC)是生产沼气的理想材料。在35±2℃的温度下，5个不同SMC和柳枝稷(SG)混合比例的固体厌氧反应器(SS-ADs)在进料与出水比(F/E)为2的条件下运行2个循环。消化池的总固体浓度保持在~ 17%。在沼气池启动期间观察到的初始沼气产量证实存在易于消化的萃取物。在第一个循环中，SMC 0 (0% SMC + 100% SG)的甲烷产量最高，为28.82 L/kg VS/d, SMC 4 (100% SMC + 0% SG)的甲烷产量最低，为10.32 L/kg VS/d。含100% SG (SMC 0)的底物在63 d内的累积沼气产量最高，达到295.43 L/kg VS。SMC分数高的沼气池分解后甲烷产量低，pH值低，VFA含量高。SMC/SG为50:50的SS-ADs的甲烷产量是SMC为单一底物的SS-ADs的2倍以上。体积生产力的估计也与SMC/SG比建立了线性关系。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Proceedings of the Institution of Civil Engineers-Waste and Resource Management ENGINEERING, ENVIRONMENTAL-

CiteScore

1.70

自引率

14.30%

发文量

期刊介绍： Waste and Resource Management publishes original research and practice papers on all civil engineering and construction related aspects of the resource management cycle, from the minimization of waste, through the re-use and recycling, to the management and disposal of residual wastes. Associated legislation, standards, socio-economic considerations and links with sustainable consumption and production are included. The range of subjects covered encompasses, but is not restricted to, strategies for reducing construction waste through better design, improved recovery and re-use, more efficient resource management, the performance of materials recovered from wastes, and, the procurement, planning, design, construction, operation and logistics of waste and resource management facilities.