Fractions and biodegradability of dissolved organic matter derived from different composts.
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.
College of Life Science, Northeast Agricultural University, Harbin 150030, China. Electronic address: weizm691120@163.com.
Zimin
Z
Wei
College of Life Science, Northeast Agricultural University, Harbin 150030, China.
Xu
X
Zhang
College of Life Science, Northeast Agricultural University, Harbin 150030, China.
Yuquan
Y
Wei
College of Life Science, Northeast Agricultural University, Harbin 150030, China.
Xin
X
Wen
College of Life Science, Northeast Agricultural University, Harbin 150030, China.
Jianhong
J
Shi
College of Life Science, Northeast Agricultural University, Harbin 150030, China.
Junqiu
J
Wu
College of Life Science, Northeast Agricultural University, Harbin 150030, China. Electronic address: zhao1970yue@163.com.
Yue
Y
Zhao
Laboratory of Water Environmental System Engineering, Chinese Research Academy of Environmental Science, Beijing 100012, China.
Beidou
B
Xi
D057919:Biological Oxygen Demand Analysis; D008970:Molecular Weight; D009930:Organic Chemicals / Q000032:analysis*; D012987:Soil / Q000737:chemistry*; D014462:Ultrafiltration
D009930:Organic Chemicals; D012987:Soil
Biodegradability; Dissolved organic matter (DOM); Mature composts; Molecular weight