title: Using porphyritic andesite as a new additive for improving hydrolysis and acidogenesis of solid organic wastes.
abstract: The effects of porphyritic andesite on the hydrolysis and acidogenesis of solid organic wastes were investigated by batch and continuous experiments using a rotational drum fermentation system. The results of the batch experiment show that if porphyritic andesite (1%, 3%, and 5% reactants) is added initially, the pH level increases and hydrolysis and acidogenesis are accelerated. The highest surface based hydrolysis constant (26.4x10(-3) kgm(-2) d(-1)) and volatile solid degradation ratio (43.3%) were obtained at a 1% porphyritic andesite addition. In the continuous experiment, porphyritic andesite elevated the first order hydrolysis constant from 13.10x10(-3) d(-1) to 18.82x10(-3) d(-1). A particle mean diameter reduction rate of 33.05 microm/d and a volatile solid degradation rate of 3.53 g/L d(-1) were obtained under the hydraulic retention time of 4, 8, 12 and 16 d.
authors: Key Laboratory of Agricultural Engineering in Structure and Environment, Ministry of Agriculture, China Agricultural University, Qinghua Donglu 17, Beijing 100083, China.
authors: Dawei
authors: D
authors: Li
authors: Tao
authors: T
authors: Zhou
authors: Ling
authors: L
authors: Chen
authors: Weizhong
authors: W
authors: Jiang
authors: Fan
authors: F
authors: Cheng
authors: Baoming
authors: B
authors: Li
authors: Yutaka
authors: Y
authors: Kitamura
mesh_terms: D000143:Acids / Q000737:chemistry; D000327:Adsorption; D001709:Biotechnology / Q000295:instrumentation / Q000379:methods*; D005285:Fermentation; D006863:Hydrogen-Ion Concentration; D006868:Hydrolysis; D008903:Minerals / Q000737:chemistry*; D012275:Oryza / Q000378:metabolism; D011166:Porphyrins / Q000737:chemistry; D012037:Refuse Disposal / Q000379:methods*; D012722:Sewage; D013025:Glycine max; D013379:Substrate Specificity; D014908:Triticum / Q000378:metabolism; D014466:Ultraviolet Rays
chemical_list: D000143:Acids; D008903:Minerals; D011166:Porphyrins; D012722:Sewage