Changes in biochemical and microbiological parameters during the period of rapid composting of dairy manure with rice chaff

• Published in: Bioresource technology Vol. 102; no. 19; pp. 9040 - 9049
• Main Authors: Liu, Dongyang, Zhang, Ruifu, Wu, Hongsheng, Xu, Dabing, Tang, Zhu, Yu, Guanghui, Xu, Zhihui, Shen, Qirong
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.10.2011; Elsevier
• Subjects: Agricultural wastes; Agriculture - methods; Agronomy. Soil science and plant productions; Animal productions; Animals; Biological and medical sciences; Biological treatment of sewage sludges and wastes; Biotechnology; Carbon - metabolism; Cattle; Composting; Dairy manure; Environment and pollution; Enzymatic activity; Food industries; Fundamental and applied biological sciences. Psychology; General agronomy. Plant production; Industrial applications and implications. Economical aspects; Manure - analysis; Manure - microbiology; Microbial groups; Oryza - chemistry; Oryza sativa; Soil - analysis; Soil Microbiology; Temperature; Terrestrial animal productions; Use and upgrading of agricultural and food by-products. Biotechnology; Use of agricultural and forest wastes. Biomass use, bioconversion; Vertebrates; Waste Disposal, Fluid - methods; Water soluble fraction; Composting; Dairy manure; Water soluble fraction; Enzymatic activity; Microbial groups; Farming animal; Microbiology; Dairy cattle; Biochemistry; Rice by product; Vertebrata; Mammalia; Water solubility; Artiodactyla; Microorganism; Cattle manure; Ungulata
• ISSN: 0960-8524; 1873-2976
• DOI: 10.1016/j.biortech.2011.07.052

► We investigated the dynamic of rapid composting of dairy manure and rice chaff. ► Various parameters were used as indicators for rapid composting. ► Correlation analyses were carried out to evaluate the parameters’ relationships. ► Three ratios of the bulking agents were made to test the suitability for composting. Various parameters were measured during the period of composting of dairy manure and rice chaff in different ratios (dairy manure/rice chaff=V/V, pile 1: 75/25; pile 2: 80/20; pile 3: 85/15) to evaluate their suitability as indicators for the composting process. The temperature in pile 1 increased rapidly and remained above 60°C for 30days, while the temperature in pile 3 increased slowly relative to the other two piles. Furthermore, the degradation of organic substrates, as indicated by the reduction of C/N ratio, was rapid in pile 1 (below 20% 28days after beginning of the composting). The major fluctuations of various water-soluble fractions in all piles were observed during the first 3weeks, and the results in general showed that the highest microbial populations and enzymatic activities also appeared in this phase. Various parameters indicated that the rapid composting method was a feasible one for treating agricultural wastes.