College of Life Science, Northeast Agricultural University, Harbin 150030, China.
College of Life Science, Northeast Agricultural University, Harbin 150030, China.
Bioresour Technol. 2014 Jun;161:179-85. doi: 10.1016/j.biortech.2014.03.032. Epub 2014 Mar 20.
An experiment was conducted to determine the fractions of molecular weights (MW) and the biodegradability of dissolved organic matter (DOM) in mature composts derived from dairy cattle manure (DCM), kitchen waste (KW), cabbage waste (CW), tomato stem waste (TSW), municipal solid waste (MSW), green waste (GW), chicken manure (CM), sludge (S), and mushroom culture waste (MCW). There were distinct differences in the concentration and MW fractions of DOM, and the two measures were correlated. Fraction MW>5kDa was the major component of DOM in all mature composts. Determined 5day biochemical oxygen demand (BOD5) of DOM was correlated to the concentration of DOM and all MW fractions except MW>5kDa, indicating that the biodegradability of DOM was a function of the content and proportion of fraction MW<5kDa. This study suggests that the amount and distribution of low MW fractions affect DOM biodegradability.
进行了一项实验，以确定源自奶牛粪便（DCM）、厨余垃圾（KW）、白菜废物（CW）、番茄茎废物（TSW）、城市固体废物（MSW）、绿色废物（GW）、鸡粪（CM）、污泥（S）和蘑菇养殖废物（MCW）的成熟堆肥中分子量（MW）和可生物降解性的溶解有机物（DOM）的分数。DOM 的浓度和 MW 分数存在明显差异，并且这两个指标是相关的。MW>5kDa 的分数是所有成熟堆肥中 DOM 的主要成分。确定的 DOM 的 5 天生化需氧量（BOD5）与 DOM 的浓度和所有 MW 分数相关，除了 MW>5kDa 之外，这表明 DOM 的可生物降解性是 MW<5kDa 分数的含量和比例的函数。本研究表明，低 MW 分数的数量和分布会影响 DOM 的可生物降解性。
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