MICROBIAL BREAKDOWN OF FATS THROUGH IN-VESSEL CO-COMPOSTING OF AGRICULTURAL AND URBAN WASTES
MICROBIAL BREAKDOWN OF FATS THROUGH IN-VESSEL CO-COMPOSTING OF AGRICULTURAL AND URBAN WASTES
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DOI：
10.1016/0269-7483(88)90147-4
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发表时间：
1988-01-01
期刊：
影响因子：
--
通讯作者：
ANDRE, L
中科院分区：
文献类型：
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作者：
FERNANDES, F;VIEL, M;ANDRE, L
采用不锈钢绝热反应器研究了微生物对各种农业和城市垃圾中脂肪的降解。嗜热阶段的持续时间与初始脂肪含量有关，与达到的峰值温度无关。嗜热阶段的特点是由pH值的急剧增加，随后由稳定高于pH 8，这对应于热稳定脂肪酶的最大活性。有机物和脂质的降解率不相关的初始脂肪含量，虽然微生物活性受损的物理条件较差的最高脂肪含量。在大多数情况下，脂质降解在85- 95%的范围内。脂肪输入的上限似乎为约40%，最佳值不应超过20- 25%。
The microbial degradtaion of the fats contained in various agricultural and urban wastes was investigated using an insulated and unheated stainless-steel reactor. The duration of the thermophilic stage was related to the initial fat content, irrespective of the peak temperatures reached. The thermophilic stage was characterized by a sharp increase in pH followed by a stabilization above pH 8, which corresponds to the maximum activity of thermostable lipases. The degradation rates of organic matter and lipids were not related to the initial fat content although the microbial activity was impaired by poorer physical conditions for the highest fat contents. In most cases, lipid degradation was in the range 85-95%. The upper limit for the input of fats appears to be ca 40% and the optimum values should not exceed 20-25%.