In this study, the anaerobic co-digestion of a mixture of sawdust, Chlorella microalgae and cow manure was examined. Sawdust was added to the mixture to increase the amount of available carbon. This study has been designed to determine the impact of incorporating cellulosic material as a rich source of carbon into main substrates. Using co-digestion to create a carbon/nitrogen (C/N) gradient in the influent, a relationship between substrate composition and biogas production was investigated. In this study, 19 reactors of 500 ml capacity were filled to a level of 350 ml and operated at a mesophilic temperature of 37.5°C. Total solids (TS) in the digester feed were 3.8% and retention time in the reactors was 30 days. Design Expert 13 software and mixture design was used to design the experiments. Adding sawdust to the reactors (7–10%) improved the C/N ratio of the mixture in the reactors to an optimal value (22) and produced 25–35% more biogas. The maximum average amount of gas produced per day from a mixture of 8.3% sawdust, 33.3% algae and 58.3% cow manure was 231 ml. Adding sawdust when the TS is low in organic load prevents the reactors from acidifying, increases the stability and improves biogas output.

Mohammad Kuroshkarim

Majid Rasouli

Maryam Pazoki

Proceedings of the Institution of Civil Engineers - Waste and Resource Management

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.

The journal 'Proceedings of Institution of Civil Engineers: Waste and Resource Management' publishes original research and practice papers on all aspects of the resource management cycle related to civil engineering and construction. This includes the minimization of waste, reuse and recycling, as well as the management and disposal of residual wastes. The journal also addresses associated legislation, standards, socio-economic considerations, and links to sustainable consumption and production. The range of subjects covered is extensive, encompassing strategies for reducing construction waste through better design, improved recovery and reuse, 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.

《Proceedings of Institution of Civil Engineers: Waste and Resource Management》期刊发表关于资源管理周期各个环节的原创研究和实践论文，涵盖了从废物最小化、再利用和回收，到残余废物的管理和处置等所有土木工程和建筑相关方面。期刊内容还包括相关的立法、标准、社会经济考虑以及与可持续消费和生产的联系。所涉及的主题范围广泛，包括但不限于通过更好的设计、改进的回收和再利用、更高效的资源管理来减少建筑废物的策略，以及废物和资源管理设施的采购、规划、设计、施工、运营和物流等方面。

Effect of high-carbon co-substrates on anaerobic co-digestion stability and performance

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Journal Info

Category	Quartile
ENGINEERING, ENVIRONMENTAL	4