Simultaneous removal of ammonia nitrogen and recovery of phosphate from swine wastewater by struvite electrochemical precipitation and recycling technology

Huang, Haiming; Zhang, Peng; Zhao, Zhijun; Liu, Jiahui; Xiao, Jing; Gao, Faming

doi:10.1016/j.jclepro.2016.04.002

Cited by 175 publications

(56 citation statements)

References 53 publications

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“…The amount of manure produced by pigs in Beijing was calculated by the coefficient method, using Equation (1). Pig number data for Beijing were collected from the China Statistical Yearbook and Yearbook of Chinese Animal Husbandry (Supplementary Materials, Section 1).…”

Section: Basic Data Collection and Phosphorus Estimationmentioning

confidence: 99%

“…It plays an especially critical role in global food production. To fulfill the enormous demand of food, P consumption derived from phosphate rock has greatly increased [1]. Ironically, wasting of P occurs all over the world because of low phosphorus use efficiency (PUE), which is believed to be one of the main reasons for water eutrophication [2].…”

Section: Introductionmentioning

confidence: 99%

“…Nonetheless, intensive livestock production can be regarded as a point source, and actions to reduce total P emission may be cost-effective and urgent [8,9]. Different treatment technologies including biological, physical, and chemical or a combination of these methods have been employed to treat swine wastewaters and P recovery [1,10,11]. Among these processes, biological phosphorus removal (BPR) is used to fix phosphorus into sludge and recommended for its less energy and cost [12].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Assessment of Phosphorus Recovery from Swine Wastewater in Beijing, China

Wang

Zhang

et al. 2017

Sustainability

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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.

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Section: Basic Data Collection and Phosphorus Estimationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Assessment of Phosphorus Recovery from Swine Wastewater in Beijing, China

Wang

Zhang

et al. 2017

Sustainability

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“…The probable reason for the enhanced ammonia removal is increased microbial amounts due to the sludge recycling. The sludge retention time was prolonged so that the nitrification bacteria could multiply and take effect in the microbial degradation of ammonia [22,23]. It can be observed that the enhancement substantially increased with the sludge recycling ratio when it was below 10%.…”

Section: Effects Of the Sludge Recycling Ratio On The Coagulation Permentioning

confidence: 99%

A Pilot Study of the Sludge Recycling Enhanced Coagulation–Ultrafiltration Process for Drinking Water: The Effects of Sludge Recycling Ratio and Coagulation Stirring Strategy

Liu

Guo

et al. 2017

Water

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Abstract:The pilot-scale study on a sludge recycling enhanced coagulation-ultrafiltration (UF) process for surface water treatment is investigated in this paper. The impact of the sludge recycling ratio and coagulation stirring strategy on removal, sedimentation efficiency, and membrane fouling control was studied in this work. Sludge recycling ratios of 0%, 5%, 10%, 15%, and 20% were applied, and the optimal ratio was found to be 10%. Moreover, four stirring strategies were also applied, and the best stirring strategy for coagulation was found to be rapid mixing (velocity gradient: 280 s −1 ), which is quite different from the coagulation stirring strategy without sludge recycling. This suggests that the adsorption effect of sludge could play a leading role during the procedure. Moreover, shortening the coagulation process makes it possible to reduce energy consumption.

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“…The crystallization of struvite (MgNH 4 PO 4 ·6H 2 O) is relevant for nutrient (nitrogen and phosphorus) [1,2] recovery in waterp urification [3][4][5][6][7][8] and scale formation in pipelines, [9,10] and it is ap rimary componento fs o-called infection stones arising from urinary tract infections. [11][12][13] The vast majority of studies focused on struvite haveo verlooked fundamentala spectso fc rystal nucleationa nd growth at the near molecular level.K nowledge of these processes can aid in the design of conditions that either promote or inhibit struvitef ormation, dependingo nt he application.…”

Section: Introductionmentioning

confidence: 99%

Time‐Resolved Dynamics of Struvite Crystallization: Insights from the Macroscopic to Molecular Scale

Kim

Olympiou

McCoy

et al. 2020

Chemistry A European J

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The crystallization of magnesium ammonium phosphate hexahydrate (struvite) often occurs under conditions of fluid flow, yet the dynamics of struvite growth under these relevant environments has not been previously reported. In this study, we use a microfluidic device to evaluate the anisotropic growth of struvite crystals at variable flow rates and solution supersaturation. We show that bulk crystallization under quiescent conditions yields irreproducible data owing to the propensity of struvite to adopt defects in its crystal lattice, as well as fluctuations in pH that markedly impact crystal growth rates. Studies in microfluidic channels allow for time‐resolved analysis of seeded growth along all three principle crystallographic directions and under highly controlled environments. After having first identified flow rates that differentiate diffusion and reaction limited growth regimes, we operated solely in the latter regime to extract the kinetic rates of struvite growth along the [100], [010], and [001] directions. In situ atomic force microscopy was used to obtain molecular level details of surface growth mechanisms. Our findings reveal a classical pathway of crystallization by monomer addition with the expected transition from growth by screw dislocations at low supersaturation to that of two‐dimensional layer generation and spreading at high supersaturation. Collectively, these studies present a platform for assessing struvite crystallization under flow conditions and demonstrate how this approach is superior to measurements under quiescent conditions.

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Simultaneous removal of ammonia nitrogen and recovery of phosphate from swine wastewater by struvite electrochemical precipitation and recycling technology

Cited by 175 publications

References 53 publications

Assessment of Phosphorus Recovery from Swine Wastewater in Beijing, China

Assessment of Phosphorus Recovery from Swine Wastewater in Beijing, China

A Pilot Study of the Sludge Recycling Enhanced Coagulation–Ultrafiltration Process for Drinking Water: The Effects of Sludge Recycling Ratio and Coagulation Stirring Strategy

Time‐Resolved Dynamics of Struvite Crystallization: Insights from the Macroscopic to Molecular Scale

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