Affiliation:
1. School of New Energy and Power Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
2. Sichuan Provincial Engineering Research Center of Hydroelectric Energy Power Equipment Technology, Xihua University, Chengdu 610039, China
3. Key Laboratory of Railway Vehicle Thermal Engineering of MOE, Lanzhou Jiaotong University, Lanzhou 730070, China
4. School of Material Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China
Abstract
Based on the variations of total humus, humic acid (HA), and fulvic acid (FA) during the manure composting process, the transformation of substances in humus was analyzed, and the compost maturity indexes were constructed by using the TC-TN ratio (C/N), ratio of total humus and total
organic carbon (TOC), and humification index (HI). The results showed that: (1) The total humus content in the compost heap decreased firstly and then increased. When compost finished, the total humus content of R1, R2, and R3 was 8.33±0.31, 7.56±0.21, and 7.14±0.35%,
respectively; (2) The changes of humic acid (HA) and fulvic acid (FA) concentrations in the three kinds of manure were basically consistent with the changes in total humic acid, which decreased first and then increased; (3) When experiments finished, the ratio of total humus and TOC decreased
firstly and then increased. At the end of day 30, HI index was 1.25, 1.15, and 1.01, respectively, increasing by 48.8, 45.56, and 31.16%, respectively.
Publisher
American Scientific Publishers
Subject
Renewable Energy, Sustainability and the Environment,Biomaterials,Bioengineering
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