Assessment of Phosphorus Recovery from Swine Wastewater in Beijing, China

Abstract

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.

Environmental and Economic Sustainability of Swine Wastewater Treatments Using Ammonia Stripping and Anaerobic Digestion: A Short Review

“…In Asian countries, e.g., China, the development of intensive farming required supply of nutrients in livestock manure; the uncontrolled discharge of manure waste, including SW, into the environment was facilitated by the diversity of regulations adopted by the different cities [66]. The allowed ammonium concentration discharge is regulated by the Discharge Standard of Water Pollutant for Ammonia Industry (GB 13458-2001) [67,68].…”

Toward a Better Understanding of Phosphorus Nonpoint Source Pollution from Soil to Water and the Application of Amendment Materials: Research Trends

“…As the country with the largest consumption of inorganic fertilizers in the world, China uses 80-90% of the mined phosphate ore as mineral phosphate fertilizers in food production, and crops absorb only approximately 20% of this P amount, which eventually enters the food consumed by people [15]. Meanwhile, the high demand for inorganic fertilizers, along with low nutrient utilization efficiency [16], has put significant pressure on the limited P rock reserves and the inorganic fertilizer market that depends on these reserves.…”

“…for inorganic fertilizers, along with low nutrient utilization efficiency [16], has put significant pressure on the limited P rock reserves and the inorganic fertilizer market that depends on these reserves. In addition, due to the wide range and prevalence of agricultural activities, a large amount of P accumulation results in farmland nonpoint source pollution, which is considered one of the main sources of water environmental pollution risks [17,18].…”