Mahta Rafiee; Asadolah Akram; Mohammad Sharifi
Abstract
In order to choose the optimal solution for the management of residual by products from the olive oil industry in Roudbar city of Guilan province, a systematic literature review and expert consultation were conducted to select the criteria. Four criteria, including economic, technical, social and environmental ...
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In order to choose the optimal solution for the management of residual by products from the olive oil industry in Roudbar city of Guilan province, a systematic literature review and expert consultation were conducted to select the criteria. Four criteria, including economic, technical, social and environmental aspects were identified for choosing the solution which they divided into 12 sub-criteria. A paired comparison questionnaire was designed and completed through face-to-face interviews with 20 skilled experts in this field, using a purposeful sampling method. The Analytical Hierarchy Process (AHP) method was employed to analyze the data and perform calculations. The findings revealed that the economic criterion was the most important criterion with a weight of 0.478 in selecting the waste management approach for the olive oil industry. Afterward, respectively, technical criteria with a weight of 0.248, environmental with a weight of 0.183, and social with a weight of 0.091 were placed in the next ranks of importance by the experts. In the ranking of the alternatives, compost production was identified as the best option for managing olive oil waste in Guilan province. The results of the alternatives ranking indicated that compost production with a weight of 0.245 was considered the best option for olive oil waste in Guilan province. Followed by, renewable energy production (0.243) ranked second, animal feed production (0.236) ranked third, extraction of valuable materials (0.194) ranked fourth and finally dump in landfills (0.082) ranked last.
Abstract
Composting livestock manure and municipal solid waste is an appropriate method for waste management in order to stabilize organic wastes. The low specific mass of compost causes problems in transportion and storage activities and increases the costs. In this study some parameters affecting the pellets ...
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Composting livestock manure and municipal solid waste is an appropriate method for waste management in order to stabilize organic wastes. The low specific mass of compost causes problems in transportion and storage activities and increases the costs. In this study some parameters affecting the pellets production was investigated. Parameters considered were: particle size (1 and 2 millimeter), pellet moisture content (25, 35 and 45 percent) and kneading length (1, 2 and 3 meter). Results showed that the specific density of pellets produced under both levels of particle size, increased with increasing the Length of kneading at all levels. Interaction effect of moisture content and kneading length on the rate of fractured pellets showed that, the maximum amount of force was (556.32N) which belonged to treatment with (moisture content of 35% and length of kneading of 3 m). Also the interaction effect of particle density and length of kneading showed that maximum toughness value was (1.03 MJ/m3) which belonged to particle density of 1mm and kneading length 3 m.
