الفهرس 
صفحة عنوان باللغة الانجليزيةOnly 14 pages are availabe for public view
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Abstract
Organic wastes are typically decomposed in landfills for convenience and economic reasons. However, landfilling of organic wastes creates environmental concerns such soil contamination and increased organic contents of leachates. A sound alternative for disposing of food wastes is anaerobic digestion, which not only reduces pollution but also produces biogas for energy recovery.
Recent studies report that anaerobic digestion (AD) is an efficient alternative technology that combines biofuel production with sustainable waste management, and various technological trends exist in the biogas industry that enhance the production and quality of biogas. Further investments in AD are expected to meet with increasing success due to the low cost of available feedstock and the wide range of uses for biogas (i.e., for heating, electricity, and fuel). Biogas production is growing in the European energy market and offers an economical alternative for bioenergy production. Recent evaluations indicate that biogas produced via anaerobic digestion (AD) provides significant advantages over other forms of bioenergy because AD is an energy-efficient and environmentally friendly technology.
In this study, anaerobic digestion of different solid wastes i.e. food waste, agriculture waste (public garden waste ), garbage and chicken wastes were used in first experiment under mesophilic anaerobic digestion for 50 day to determine daily biogas production ,methane an carbon dioxide percent. Also, pH, ammoniacal nitrogen (NH4-N), total volatile fatty acids (VFAs), total nitrogen (TN), total phosphorus (TP) and total potassium (TK). The total coliform group as well as salmonella & shigella as an indicator of pathogenic bacteria and anaerobic cellulose decomposers were determined at initial and the end of the fermentation period. In the second experiment, fermentation material was mixed from all wastes. Effect of total solids was determined on biogas, methane production and manure characterization after 60 day digestion time. The obtained results show that the biogas produced ranged between 0.244 to 1.002 l/digester /day in the (Exp.1) and 5.27 to 6.094 l/digester /day in the (Exp.2). Meanwhile, feeding the digester with chicken manure produced the highest biogas and methane production(T4) , furthermore, total solid was more effect on biogas production the best was 10 % compared with other 8% or 12%. Likewise, determination of slurry was free from pathogenic bacteria and rich of mineral content.