Energy Recovery from Brewery Waste: experimental and modelling perspectives

Eric Siqueiros , Rasaq O. Lamidi , Pankaj B. Pathare , Yaodong Wang , A.P. Roskilly
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引用次数: 10

Abstract

Food and drink processing industries are extremely large consumers of thermal energy as well as bio-wastes producers. The utilisation of bio-wastes for energy recovery appears to be a good opportunity to improve the overall efficiency of process industries. In this study, waste generation, management and energy auditing of a micro-brewery located in the north east of England is investigated. Fermented grains and hops are disposed as organic wastes after the production process. Hence, this study focuses on recovery of energy from these wastes through anaerobic digestion process. Experimental work was carried out in the laboratory for the wastes characterisation. The waste samples are then anaerobically digested at 55 ⁰C and 35 ⁰C with a 5L laboratory scale continuous stirred reactor using 5 gVSL-1 and 25 days organic loading rates and hydraulic retention times respectively. Further to the experimental work, simulations were completed to evaluate the feasibility of the process. ASPEN plus simulation software was used to carry out the simulations using a novel approach for AD which is based on the ADM1 model. The experimental results showed that biogas can be produced at mesophilic and thermophilic conditions: 3.0 and 2.6 litres per day respectively. At thermophilic conditions, the methane content is 65 % while at mesophilic conditions, it is 55%. It is also found that the values of the final biogas production from the simulation were similar to the ones obtained in the experiments (-6.85%). However, the model would need further modifications to be able to accurately predict the biogas compositions. The result shows that the thermophilic process is able to fuel 126.01 kW boiler while mesophilic process can power 76.48kW boiler.

从啤酒厂废料中回收能源:实验和模型的观点
食品和饮料加工业是热能的巨大消费者,也是生物废物的生产者。利用生物废物进行能源回收似乎是提高加工工业整体效率的好机会。在这项研究中,废物的产生,管理和能源审计的一个微型啤酒厂位于英格兰东北部进行了调查。发酵谷物和啤酒花在生产过程后作为有机废物处理。因此,本研究的重点是通过厌氧消化过程从这些废物中回收能量。在实验室进行了废物特性的实验工作。然后使用5L实验室规模的连续搅拌反应器,在55⁰C和35⁰C条件下厌氧消化废物样品,分别使用5 gVSL-1和25天的有机加载率和水力保留时间。在实验工作的基础上,进行了模拟,以评价该工艺的可行性。采用基于ADM1模型的新型AD仿真方法,利用ASPEN +仿真软件进行仿真。实验结果表明,在中温和亲热条件下,沼气产量分别为每天3.0升和2.6升。在亲热条件下,甲烷含量为65%,而在中温条件下,甲烷含量为55%。模拟的最终产气量与实验结果相近(-6.85%)。然而,该模型需要进一步修改才能准确预测沼气成分。结果表明:亲热工艺可为126.01 kW锅炉提供燃料,中温工艺可为76.48kW锅炉提供动力。
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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