Sanaei-Moghadam Akbar, Abbaspour-Fard Mohammad Hossein, Aghel Hasan, Aghkhani Mohammad Hossein, Abedini-Torghabeh Javad
Laboratory of Waste Management Organization of Mashhad Municipality, Mashhad, Iran,
Appl Biochem Biotechnol. 2014 Aug;173(7):1858-69. doi: 10.1007/s12010-014-0972-5. Epub 2014 Jun 4.
Anaerobic digestion (AD) process is a well-established method to generate energy from the organic wastes both from the environmental and economical perspectives. The purpose of present study is to evaluate energy production from potato wastes by incorporating cow manure into the process. Firstly, a laboratory pilot of one-stage biogas production was designed and built according to continuously stirred tank reactor (CSTR) system. The setup was able to automatically control the environmental conditions of the process including temperature, duration, and rate of stirring. AD experiment was exclusively performed on co-digestion of potato peel (PP) and cow manure (CM) in three levels of mixing ratio including 20:80, 50:50, 80:20 (PP:CM), and 0:100 as control treatment based on the volatile solid (VS) weight without adding initial inoculums. After hydraulic retention time (HRT) of 50 days on average 193, 256, 348, and 149 norm liter (LN) (kg VS)(-1), methane was produced for different mixing ratios, respectively. Statistical analysis shows that these gas productions are significantly different. The average energy was determined based on the produced methane which was about 2.8 kWh (kg VS)(-1), implying a significant energy production potential. The average chemical oxygen demand (COD) removal of treatments was about 61%, showing that it can be leached significantly with high organic matter by the employed pilot. The energy efficiency of 92% of the process also showed the optimum control of the process by the pilot.
厌氧消化（AD）工艺是一种从环境和经济角度利用有机废物产生能源的成熟方法。本研究的目的是通过在该工艺中加入牛粪来评估马铃薯废物的能源生产。首先，根据连续搅拌槽式反应器（CSTR）系统设计并建造了一个单级沼气生产实验室中试装置。该装置能够自动控制该工艺的环境条件，包括温度、持续时间和搅拌速率。AD实验专门针对马铃薯皮（PP）和牛粪（CM）的共消化进行，混合比例分为三个水平，即20:80、50:50、80:20（PP:CM），以及0:100作为对照处理，基于挥发性固体（VS）重量，不添加初始接种物。在平均50天的水力停留时间（HRT）后，不同混合比例分别产生了193、256、348和149标准升（LN）（千克VS）⁻¹的甲烷。统计分析表明，这些气体产量存在显著差异。基于产生的甲烷确定平均能量约为2.8千瓦时（千克VS）⁻¹，这意味着具有显著的能源生产潜力。各处理的平均化学需氧量（COD）去除率约为61%，表明所采用的中试装置能够有效去除高有机物。该工艺92%的能源效率也表明中试装置对该工艺进行了优化控制。
