Microbial C and N dynamics during composting process of urban solid waste

被引：17

作者：

Ben Ayed, Layla ^{[1
]}

Hassen, Abdennaceur ^{[1
]}

Jedidi, Naceur ^{[1
]}

Saidi, Neila ^{[1
]}

Bouzaiane, Olfa ^{[1
]}

Murano, Fumio ^{[1
]}

机构：

[1] Inst Natl Rech Sci & Tech, Hammam Lif, Tunisia

来源：

WASTE MANAGEMENT & RESEARCH | 2007年 / 25卷 / 01期

关键词：

compost; total microbial biomass; carbon; nitrogen; fumigation-extraction; vmr; 970-6;

D O I：

10.1177/0734242X07073783

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Microbial characterization of composting is of importance for the optimization of the process and the quality of the end product. The aim of this work was to follow microbial biomass C and N dynamics during the composting process of urban solid waste. Microbial biomass C (B-C) ranged from 4.06 to 1 mu g kg(-1) of dry compost from day 5 to day 62 and decreased to reach 0.44 mg kg-1 in mature compost. Microbial biomass N (B-N) showed the same trend as B-C, ranging from 1.472 to 0.443 mu g kg(-1) of dry compost from day 5 to day 62. This behaviour is probably related to the decreasing availability of readily decomposable substrates with the ongoing of the process. B-C and B-N showed a strong correlation (r = 0.78). The dynamics of the B-C/B-N ratio, index of the chemical composition of the whole microbial population suggested a shift in the composition of microbial populations during the process from prevailing bacteria and actinomycetes to prevailing fungi.

引用

页码：24 / 29

页数：6

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