Characterization of pig manure-derived hydrochars for their potential application as fertilizer

Environmental Science and Pollution Research International
Chengfang SongHailong Wang

Abstract

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 fer...Continue Reading

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Aug 31, 2016·Environmental Science and Pollution Research International·Weidong WuHailong Wang

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Citations

Sep 27, 2018·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Jia WeiYongzhen Peng
Nov 2, 2019·Environmental Geochemistry and Health·Shaopan XiaHailong Wang
Aug 23, 2019·Environmental Science and Pollution Research International·Shasha GuoYajun Yang
Apr 18, 2021·The Science of the Total Environment·Lan WuBing-Jie Ni
Apr 25, 2020·The Science of the Total Environment·Chengfang SongYucheng Cao

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