Evaluation of ammonia recovery from swine wastewater via a innovative spraying technology

Leipeng Cao; Jingjing Wang; Ting Zhou; Zihan Li; Shuyu Xiang; Fuqing Xu; Roger Ruan; Yuhuan Liu

doi:10.1016/j.biortech.2018.10.021

Evaluation of ammonia recovery from swine wastewater via a innovative spraying technology

Bioresour Technol. 2019 Jan:272:235-240. doi: 10.1016/j.biortech.2018.10.021. Epub 2018 Oct 12.

Authors

Leipeng Cao¹, Jingjing Wang¹, Ting Zhou¹, Zihan Li¹, Shuyu Xiang¹, Fuqing Xu², Roger Ruan³, Yuhuan Liu⁴

Affiliations

¹ State Key Laboratory of Food Science and Technology, Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang 330047, China.
² Department of Food, Agricultural and Biological Engineering, The Ohio State University, Ohio Agricultural Research and Development Center, 1680 Madison Avenue, Wooster, OH 44691, USA.
³ State Key Laboratory of Food Science and Technology, Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang 330047, China; Center for Biorefining and Dept. of Bioproducts and Biosystems Engineering, University of Minnesota, Paul 55108, USA.
⁴ State Key Laboratory of Food Science and Technology, Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang 330047, China. Electronic address: liuyuhuan@ncu.edu.

PMID: 30343225
DOI: 10.1016/j.biortech.2018.10.021

Abstract

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 m³ h^-1 of continuous spraying, and 45 °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.

Keywords: Ammonia nitrogen; Mass transfer coefficient; Resin; Sprayer; Swine wastewater.

Publication types

Evaluation Study

MeSH terms

Ammonia / chemistry
Ammonia / isolation & purification*
Animals
Swine
Waste Disposal, Fluid / methods*
Wastewater / chemistry*

Substances

Waste Water
Ammonia