Coupling of biochar-mediated absorption and algal-bacterial system to enhance nutrients recovery from swine wastewater

Jiajia Yu; Hancui Hu; Xiaodan Wu; Ting Zhou; Yuhuan Liu; Roger Ruan; Hongli Zheng

doi:10.1016/j.scitotenv.2019.134935

Coupling of biochar-mediated absorption and algal-bacterial system to enhance nutrients recovery from swine wastewater

Sci Total Environ. 2020 Jan 20:701:134935. doi: 10.1016/j.scitotenv.2019.134935. Epub 2019 Nov 2.

Authors

Jiajia Yu¹, Hancui Hu¹, Xiaodan Wu¹, Ting Zhou¹, Yuhuan Liu¹, Roger Ruan², Hongli Zheng³

Affiliations

¹ MOE Biomass Energy Research Center and College of Food Science and Technology and State Key Laboratory of Food Science and Technology, Nanchang University, 235 East Nanjing Road, Nanchang, Jiangxi 330047, People's Republic of China.
² MOE Biomass Energy Research Center and College of Food Science and Technology and State Key Laboratory of Food Science and Technology, Nanchang University, 235 East Nanjing Road, Nanchang, Jiangxi 330047, People's Republic of China; Center for Biorefining and Department of Bioproducts and Biosystems Engineering, University of Minnesota, 1390 Eckles Avenue, St. Paul, MN 55108, United States.
³ MOE Biomass Energy Research Center and College of Food Science and Technology and State Key Laboratory of Food Science and Technology, Nanchang University, 235 East Nanjing Road, Nanchang, Jiangxi 330047, People's Republic of China. Electronic address: honglizheng@ncu.edu.cn.

PMID: 31726415
DOI: 10.1016/j.scitotenv.2019.134935

Abstract

Algal-bacterial system (ABS) used in treatment of high-strength ammonium wastewaters receives more and more attentions. In this paper, biochar-mediated absorption (BMA) and ABS were applied to recover nutrients from swine wastewater (SW) with high-strength ammonium, respectively. The results showed that the BMA could recover ammonium from the SW, which mitigated ammonia toxicity to the ABS. The bacterial community diversity containing four phyla of bacteria was identified for the first time during nutrients recovery from the SW by the ABS. Proteobacteria and Firmicutes were the two most abundant phyla. A novel scheme for nutrients recovery from the SW by the coupled BMA-ABS method was proposed and evaluated. Nutrients recovery was obviously improved by the coupled BMA-ABS method with biomass concentration of 1.97 g L^-1, and a NH₄⁺-N recovery efficiency of 96%, a total nitrogen recovery efficiency of 95%, a total phosphorus recovery efficiency of 96%, and a chemical oxygen demand recovery efficiency of 99%. The coupled BMA-ABS method could enhance nutrients recovery from the SW.

Keywords: Ammonium; Bacterial community; Chlorella vulgaris; Microalga; Modified biochar.

MeSH terms

Charcoal*
Nitrogen / analysis
Phosphorus / analysis
Waste Disposal, Fluid / methods*
Wastewater / microbiology*

Substances

Waste Water
biochar
Charcoal
Phosphorus
Nitrogen