期刊
WATER AIR AND SOIL POLLUTION
卷 232, 期 4, 页码 -出版社
SPRINGER INT PUBL AG
DOI: 10.1007/s11270-021-05100-8
关键词
Biochar; Filtering material; Livestock wastewater; Rice straw; Wastewater treatment
资金
- TheMinistry of Education and Training [B2020-NLS04]
- Thuyloi University Foundation for Science and Technology
Rice straw-derived biochar has shown potential as an effective material for removing organic pollutants from livestock wastewater treatment, with higher removal efficiencies observed in column tests compared to batch experiments.
The use of rice straw for biochar production has been widely proved as a great alternative energy source, which not only is cheaper than other commercial coals but also helps mitigation of climate change. In this study, the rice straw-derived biochar was assessed as a sorption material used for livestock wastewater treatment, which has not much been studied so far. The biochar derived from rice straw had moisture content of 4.9 +/- 0.5 %, bulk density of 0.38 +/- 0.03 g/cm(3), iodine number of 958.0 +/- 37.0 mg/g, and pH was determined at 7.6 +/- 0.1. The optimal contact time, biochar mass concentration, and pH were determined as 3.0 h, 4.0 g/L, and 9.0, respectively. The COD and BOD5 removal efficiencies were up to 40.0% via the batch experiment. However, the column test results showed the higher removal efficiencies which were 79.0 +/- 6.1% for COD and 84.0 +/- 2.5% for BOD5 with the influent COD concentration of 373.0 +/- 8.0 mg/L and BOD5 concentration of 240.0 +/- 3.0 mg/L-. The effluent all met the current livestock wastewater discharge standard of Vietnam (QCVN 62-MT:2016/BTNMT). These findings indicate the potential of using straw-derived biochar as a good material for removing organic pollutants from livestock wastewater.
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