Characterization of pig manure-derived hydrochars for their potential application as fertilizer
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In China, intensive pig farming has led to serious environmental issues with the need to dispose off large quantities of pig manure. Chinese agriculture relies on high inputs of chemical fertilizers leading to gradual decreasing organic matter contents in many arable soils. We propose that hydrochars produced from pig manure could potentially replace chemical fertilizers and, at the same time, resolve the waste disposal problem. The hydrochars used in this study were produced from pig manure at five different pyrolysis temperatures ranging between 160 and 240 °C and three residence times (1, 5, and 8 h). All hydrochars were assessed for composition of major elements. Results showed that the yield and organic matter (OM) contents in hydrochars were 50–74% and 40–56%, respectively. The concentrations of total nitrogen (N), potassium (K2O), and OM in the hydrochar decreased, whereas contents of phosphorus (P2O5), copper (Cu), and zinc (Zn) increased with increasing reaction temperature and time. Hydrothermal carbonization of pig manure is a rapid method for transforming pig manure into an organic fertilizer, but it is necessary to assess the potential soil contamination risk of Cu and Zn for the pig manure hydrochar as organic fertilizer.
KeywordsPig manure Hydrothermal carbonization Hydrochar Biochar Organic fertilizer
This study was supported by the National Science and Technology Cooperation Project (2014DFE90040), Key Innovation Team Project of Zhejiang Province, China (2013TD12), the Natural Science Foundation of China (41501341; 21577131), the Zhejiang Provincial Natural Science Foundation, China (Y16D010036, LZ15D010001), the Guangdong Provincial Natural Science Foundation, China (2017A030311019), and the Special Funding for the Introduced Innovative R&D Team of Dongguan (2014607101003).
- Dong ZR (2006) Effects of swine manure-born heavy metals on accumulation of heavy metals in vegetable soil and vegetables. MSc thesis. Zhejiang University, Hangzhou, ChinaGoogle Scholar
- Li YH (2015) Study on resource utilization potential of livestock and poultry manure. Huazhong Agricultural University, Wuhan, China, MSc thesisGoogle Scholar
- Liu RL, Li ST, Wang XB, Wang M (2005) Contents of heavy metal in main commercial organic fertilizers and organic wastes. J Agro-Environ Sci 24:392–397Google Scholar
- Lu RK (1999) Analytical methods for soil agrochemistry. Chinese agricultural science and technology publishing house (in Chinese), BeijingGoogle Scholar
- Lu K, Yang X, Gielen G, Bolan N, Ok YS, Niazi NK, Xu S, Yuan G, Chen X, Zhang X, Liu D, Song Z, Liu X, Wang H (2017) Effect of bamboo and rice straw biochars on the mobility and redistribution of heavy metals (Cd, Cu, Pb and Zn) in contaminated soil. J Environ Manage 186(Part 2):285–292CrossRefGoogle Scholar
- Ministry of Agriculture (2012) Organic fertilizer standards (NY525-2012). Ministry of agriculture, Beijing, PR ChinaGoogle Scholar
- Wang HP, Zhang Q, Li Y, Ren LH, Li FL, Luo T, Weng BQ, Wang QY (2015a) Effects of pyrolysis temperature on yield and physicochemical characteristics of biochar from animal manures. J Agro-Environ Sci 34:2208–2214Google Scholar
- Wang WJ, Li B, Li LQ (2015b) Influence of low-temperature pyrolysis treatment on bioavailability of heavy metals in pig manure. J Agro-Environ Sci 34:994–1000Google Scholar
- Wu W, Li J, Lan T, Müller K, Niazi NK, Chen X, Xu S, Zheng L, Chu Y, Li J, Yuan G, Wang H (2017) Unraveling sorption of lead in aqueous solutions by chemically modified biochar derived from coconut fiber: a microscopic and spectroscopic investigation. Sci Total Environ 576:766–774CrossRefGoogle Scholar
- Xie ZL, Zhu HS, Li WY, Li XY, Cao WD, Niu HY, Li J (2011) Distribution of Cu and Zn in feces/soil system of livestock and poultry manure in Jilin Province. J Agric Environ Sci 30:2279–2284Google Scholar
- Xing YW, Li R (1999) The nutrient database of China organic fertilizer. Science Press, BeijingGoogle Scholar