Physico-chemical pretreatment and fungal biotreatment for park wastes and XXXX dung for biogas production.

@entity13473 @entity3158 @entity577 @entity6674 @entity195 @entity13546 @entity291
UNASSIGNED: With the rising demand for renewable energy and environmental protection, anaerobic digestion of biogas technology has attracted considerable attention within the scientific community. The effect of physico-chemical pretreatment on cellulose degradation followed by fungal treatment by @entity13473 and Trichoderma viride to treat cellulosic biomass for enhancing its digestibility was investigated. The tested substrate was digested with and without physical, chemical, and biological treatment. Fresh leaves, dry leaves and @entity291 dung were characterized by a total solids content 35, 84 and 17  %, volatile solids content 81.2, 59.49 and 64.5  % and C/N ratio 31, 45.4 and 13.6, respectively. Biogas total volume was determined using water replacement technique, while @entity577 volume was determined using precipitation of @entity3158 in 20  % @entity6674 solution. Pretreatment steps were carried out by using mechanical and chemical pretreatments using 2.5  % @entity6674 mixed with 2.5  % @entity13546 for 15  days, followed by biological treatment of A. terreus and T. viride. The potential of pretreatment of substrate was studied at regular intervals of 0, 7, 14, 21, 28, 35, 42, 49, 56, 63 and 70  days determining the change in chemical and physical compositions of used substrates. Biogas production was 102.6 and 125.9  L/KgVS from untreated and pretreated substrate, respectively. On the other hand, @entity577 production was 61.4 and 79.8  L/KgVS from untreated and pretreated substrate, respectively. In conclusion, Physical (milling), chemical ( @entity6674 and @entity13546 ) pretreatment in addition to fungal (A. terreus and T. viride) treatment for the tested substrate prior to @entity195 was an efficient process for improvement of biogas and @entity577 production.
