期刊
BIORESOURCE TECHNOLOGY
卷 272, 期 -, 页码 235-240出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2018.10.021
关键词
Swine wastewater; Ammonia nitrogen; Sprayer; Resin; Mass transfer coefficient
资金
- Research Project of State Key Laboratory of Food Science and Technology Nanchang University [SKLF-ZZB-201722]
- Key project of Jiangxi Provincial Department of Science and Technology Jiangxi [20161BBF60057]
- National Natural Science Foundation of China [21466022, 21878139]
- Special fund for Jiangxi Province [GCXZ2014-124 100102102082]
- National study abroad Fund
An innovative spraying system for NH4+-N removal and recovery was investigated under different pH, temperature, spraying frequency and rate by using spraying system. Results showed that NH4+-N removal efficiency and mass transfer coefficient (K-La) value in swine wastewater (SW) remarkably increased with increasing of temperature, spraying frequency and rate due to promoting the diffusion of NH3 molecules caused by increasing specific surface of SW molecule, and high shear force and temperature difference between SW and circulating heating tube. Considering the cost and discharge standard, the optimum parameters for NH4+-N removal from SW using spraying system were alkaline, 0.24 m(3) h(-1) of continuous spraying, and 45 degrees C circulating water, and the NH4+-N decreased from 591.2 to 68.9 mg L-1 (< 80 mg L-1) after 8 h treatment, and this value corresponded to 88.35% removal rate. Furthermore, over 85% recovery rate for NH4+-N could be obtained through absorption of phosphoric acid.
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