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pp.95-103
This study was conducted to evaluate chemical parameters on butchery wastes as a bulking agent in composting of swine manure. Treatments included T1 ; Swine manure + Rice hull, T2 ; Swine manure + Rice hull + Vermiculite, T3 ; Swine manure + Rice hull + Perlite, T4 ; Swine manure + Vermiculite, T5 ; Swine manure + Vermiculite + Perlite, T6 ; Swine manure + Perlite, T7 ; Swine manure + Rice hull + Vermiculite + Perlite. During the composting period, changes of temperature and pH were showed traditionally composting trend. Moisture, organic matter, total nitrogen and C/N ratio were higher rice hull than vermiculite and perlite treatments. Ammonia-N and EC were not differences among the treatments. In heavy metal, Cd and Cr were showed higher in vermiculite treatments than other treatments. Rice hull treatments were decreased volatile fatty acids compared to that of other treatments. In conclusion, rice hull containing high organic content was greater composting effects than vermiculite and perlite containing low organic content.
