Utilization of Co-digestion of Local Brewery Wastes and Cattle Dung as a Potential Source of Biogas and Organic Fertilizer
سال انتشار: 1395
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 57
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شناسه ملی سند علمی:
JR_JREE-3-4_004
تاریخ نمایه سازی: 10 آبان 1402
چکیده مقاله:
Biogas production from co-digestion of local brewery waste (BW) and cow dung (CD) was study for value added to this solid waste. The objective of this research was to fine the optimum condition for maximum biogas production and also examined the effectiveness of the biogas residue (liquor from anaerobic digestion process) as a nitrogen source for the production of okro. The experiments were performed in a laboratory scale of ۱.۵ liters plastic bottles were used as digesters operated in batch mode and mesophilic conditions [۳۵°C±۰.۵]. The feedstock were test in the following ratios CD:BW, ۹۰:۱۰, ۸۰:۲۰. ۷۰:۳۰, ۶۰:۴۰, ۵۰:۵۰, ۴۰:۶۰, ۳۰:۷۰. ۲۰:۸۰ and ۱۰:۹۰. The maximum biogas yield was attained with mixtures in the proportions of ۷۰:۳۰ CD:BW. At these proportions, there was a biogas yield increase as compared to other ratios. The addition of BW increased the biogas yield from ۰.۴۰t/lt.day to ۰.۹۲lt/lt.day. It was found that CD: BW of ۷۰:۳۰ is the optimum ratio from batch process. The gradual reduction of the VFA concentration clearly indicated the stability of the process. A micro (pot) experiment was conducted to study the comparative effects of biogas residues, and NPK fertilizers on growth and yield using okro as the test crop. Twelve experimental soil filled pot in a complete randomized block design was used comprising of three each for Control T۱ (no NPK and no BR), T۲ ۱۰۰% NPK fertilizer, T۳ ۵۰% BR plus ۵۰% NPK fertilizers and T۴ biogas residues (BR ۱۰۰). The parameters studied showed that plant height, root length, number of fruits per plant and fruit weight was affected by the addition of biogas residue. A maximum ۲۰.۲% plant height increase over control T۱ was observed in T۳, ۱۰۰% NPK has ۱۰% while T۴ has ۸%. A maximum increase of ۲۸.۵۷% number of fruits was recorded in treatment T۲ and T۳, while ۱۴.۲۹% increased was recorded in T۴ compared with control. The ۵۰% BR applied in combination with ۵۰% NPK (T۳) resulted in ۲۵.۴۲% increase in fruit weight over control, T۴ has ۲۰.۳۴% and ۱۶.۹۵% was observed in T۲. Based on these results, it may be concluded that the application of approximately ۵۰% of biogas residue and ۵۰% inorganic fertilizer improves the production of okro.
کلیدواژه ها:
نویسندگان
Olatunde A. Oyelaran
Department of Mechanical Engineering, Federal University Oye - Ekiti, Nigeria
Yau Y. Tudunwada
Heavy Machinery and Equipment Development Institute, Bauchi, Nigeria
James K. Abidoye
Department of Research and Development, Hydraulic Equipment Development Institute, Kano, Nigeria
Olawale M. Sanusi
Department of Mechanical Engineering, Federal University Oye - Ekiti, Nigeria
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