Assessment of Phosphorus Recovery from Swine Wastewater in Beijing, China

Qiming Wang, Tao Zhang, Xinyue He and Rongfeng Jiang
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Qiming Wang: These authors contributed equally to this work.
Tao Zhang: These authors contributed equally to this work.
Xinyue He: Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, Key Laboratory of Plant-Soil Interactions of Ministry of Education, Biomass Engineering Center, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
Rongfeng Jiang: Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, Key Laboratory of Plant-Soil Interactions of Ministry of Education, Biomass Engineering Center, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China

Sustainability, 2017, vol. 9, issue 10, 1-14

Abstract: The nutrient management of phosphorus (P) contained in swine wastewater is an important challenge to enhance P use efficiency. In the present study, assessment of P recovery from swine wastewater in Beijing was performed. P amounts of swine wastewater increased from 11,687 tons in 1980 to 16,237 tons in 2014. Without treatment of swine wastewater, P concentration will reach a maximum 1.20 mg/L. The maximum P recovery was 99.36% under the condition of crystallization coupled BPR (biological phosphorus removal) when the operating conditions were 60.6 mg/L for C p (initial P concentration (mg/L)), 1.2 for Mg/P (magnesium-to-P molar ratio), 9.7 for pH of crystallization process, and 8.0 for pH, 1.6 h for anaerobic stage time, 15 days for sludge retention time of BPR. The P concentration for water quality was 0.03 mg/L to meet the water regulation standard. Under this situation, if the target P concentration were set as Grade II and III, pig breeding numbers reached 42.07 and 95.90 million heads. Construction investments for the crystallization, BRP, and coupled methods are 411 (10 4 Yuan, 604,307 USD), 301 (10 4 Yuan, 442,580 USD), and 551 (10 4 Yuan, 810,170 USD), respectively. The running costs are 15.205 (10 4 Yuan/year, 22,360 USD/year), 28.907 (10 4 Yuan/year, 42,500 USD/year) and 44.112 (10 4 Yuan/year, 64,860 USD/year). To manage non-point pollution, swine wastewater treatment facilities should be used and pig breeding numbers should be managed within reasonable ranges.

Keywords: phosphorus; swine wastewater; assessment (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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