Effect of four crop straws on transformation of organic matter during sewage sludge composting
| Autor: | Bi-qiong Li, De-ti Xie, Jiu-pai Ni, Xiu-lan Zhao |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Agriculture (General)
020209 energy 02 engineering and technology Plant Science 010501 environmental sciences engineering.material 01 natural sciences Biochemistry S1-972 Crop chemistry.chemical_compound Food Animals 0202 electrical engineering electronic engineering information engineering Lignin Organic matter Hemicellulose humification organic matter degradation 0105 earth and related environmental sciences chemistry.chemical_classification sewage sludge Ecology Compost Straw Humus chemistry Agronomy composting engineering Animal Science and Zoology Agronomy and Crop Science crop straw Sludge Food Science |
| Zdroj: | Journal of Integrative Agriculture, Vol 15, Iss 1, Pp 232-240 (2016) |
| ISSN: | 2095-3119 |
| Popis: | A 45-d laboratory experiment was conducted to compare the effect of four crop straws on the transformations of organic matter (OM) during composting of sewage sludge. The four crop straws included rape straw, wheat straw, maize straw and rice straw. The following parameters such as temperature, OM, humic-like substances (HS), fulvic-like acids (FA) and humic-like acids (HA) were determined. The degradation of OM and the formation of HS and HA could be described well by the first-order kinetic model, while the FA content fluctuated during composting. The maximal degradation rates of OM in the compost piles added with rape straw, wheat straw, maize straw and rice straw were 34.7, 46.9, 54.7 and 52.8%, respectively, and the final contents of HS were 118, 128, 141 and 134 g kg−1, respectively, while the humification indices were higher in the compost piles added with maize straw and wheat straw than in those with rice straw and rape straw. The results indicate that a higher hemicellulose content and a lower C/N ratio in crop straw can result in a higher rate of OM degradation and higher contents of HS, while a higher content of lignin can lead to a higher polymerization degree of humic substances in compost piles. The final compost piles added with maize straw has the highest contents of OM, total nitrogen and humus substance as well as the highest values of polymerization degree, while compost piles with rape straw have the highest potassium content and those with rice straw have the highest pH values. |
| Databáze: | OpenAIRE |
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