Abstract
The first aim of the present study is to investigate the feasibility of the biogas production potential from Spent Mushroom Compost. Hence, its secondary aim is to study the replacement of this energy with the fossil energy source and its impact on the reduction of greenhouse gases emission. The production potential of biogas was evaluated in a laboratory-scale Open Outlet Flow Batch Type Anaerobic digester. Setups of biogas production were set at temperatures of 35°C and 55°C. Results indicate that the cumulative production of biogas at 55°C was more than that at 35°C (364.8 and 314.11 L/kg.VS, respectively). The energy required for 1 ton of spent mushroom compost in one period of production was 204.24–5.35T kW.h/ton. The amount of energy produced in a period of biogas production was calculated to be 277.95 kW.h/ton at 35°C and 322.84 kW.h/ton at 55°C. Results show that the total produced spent mushroom compost of the country is equal to 414,491.7 tons per year. Accordingly, the potential of methane production was calculated to be 8690.8 × 103 m3 per year. It can also reduce 0.02% of the total annual production of CO2 in Iran.
Highlights
Iran is rich in fossil fuels such as coal, oil, and natural gas
The biomass resources include a wide range of organic materials that are mainly divided into six groups: (1) wood, (2) wastes collected from forest, and the agriculture, horticulture, and food industries, (3) municipal solid wastes, (4) wastewater, (5) livestock wastes, and (6) sewage and organic waste of industries
The primary aim of the present study is to investigate the feasibility of biogas production potential from the spent mushroom compost (SMC)
Summary
Iran is rich in fossil fuels such as coal, oil, and natural gas. After fossil fuels, biomass is the fourth largest sustainable energy source in Iran and across the world. Liu et al (2012) have studied the feasibility of developing anaerobic digestion (AD) for municipal biomass waste (MBW) in China that was focused on biogas production and GHG reduction. They reported that GHG reduction is an important environmental benefit derived from MBW digestion. Wastes of mushroom compost have a high content of organic material (about 60% (Wisniewska & Pankiewicz, 1989)) and they contain a significant amount of straw and animal manure that increases the rate of fermentation It seems to be a highly suitable source for the production of biogas. In a study conducted by (Uddin et al, 2016), biogas was presented as an alternative energy source and its impact on the Pakistani economy and healthrelated issues (dos Santos, Barros, & Tiago Filho, 2016) introduced population growth as a factor responsible
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