Struvite Precipitation from Anaerobically Digested Dairy Manure

Brown, Katelyn D.; Harrison, Joe; Bowers, Keith

doi:10.1007/s11270-018-3855-5

Cited by 16 publications

(7 citation statements)

References 36 publications

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“…The table shows that the ACEC reactor was comparable to the other technologies in terms of nutrients removal. The recent study achieved 88.4% removal of phosphate, which was comparable to the reactor STR and Electrolyzer from previous studies (Aguado et al, 2019; Brown et al, 2018; Taddeo & Lepistö, 2015; Wang, Fu et al, 2019). In terms of nitrogen removal, the recent study achieved 56.0% which was higher than the STR reactor from the previous study (Xavier et al, 2014).…”

Section: Resultssupporting

confidence: 83%

“…1.0 8.3 ± 0.9 10.4 ± 0.6 46.2 ± 2.1 13.1 ± 0.9 362 2.0 14.7 ± 1.2 22.9 ± 0.9 57.1 ± 1.1 18.6 ± 0.9 498 3.0 9.9 ± 1.1 11.6 ± 0.5 35.2 ± 1.7 8.6 ± 0.7 257 4.0 8.8 ± 1.1 12.5 ± 0.9 34 ± 0.4 9.8 ± 0.8 288 5.0 5.8 ± 0.3 8.2 ± 0.9 28.8 ± 1.7 9.8 ± 0.7 256 removal of phosphate, which was comparable to the reactor STR and Electrolyzer from previous studies (Aguado et al, 2019;Brown et al, 2018;Taddeo & Lepistö, 2015;Wang, Fu et al, 2019). In terms of nitrogen removal, the recent study achieved 56.0% which was higher than the STR reactor from the previous study (Xavier et al, 2014).…”

Section: Effect Of Initial Ph On Nutrients Removal and Struvite Preci...supporting

confidence: 86%

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Nutrient Recovery From Organic-Rich Wastewater Through Struvite Precipitation using Air Cathode Electrocoagulation Technology

Effendi

Baashen

Hidayat

2022

Air, Soil and Water Research

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This study developed an innovative method for phosphate recovery contained in wastewater using air cathode electrocoagulation (ACEC) technology. This technique has the advantage of low energy consumption since it can effectively produce the struvite precipitate without any electrical-grid energy consumption. The experiments were conducted under recirculating batch mode by varying the recirculation rate and initial pH of wastewater to investigate their effects on the ACEC reactor performance. SEM-EDS and XRD analyses were performed to examine the morphology and structure of the produced crystals. The result showed that the precipitates exhibited in the form of crystals with irregularly shaped accompanied by a sharp at the surface and composed of Mg (6.67%), P (6.78%), N (1.66%), and O (47.41%). XRD chromatogram showed that the precipitate matched the reference pattern for struvite. The recirculation rate of 2.0 mL min−1 was determined as an optimum condition with nitrogen and phosphate removal, nitrogen and phosphate removal rate, and struvite precipitation rate was 14.7% ± 1.2%, 57.1% ± 1.1%, 22.9 ± 0.9 mg L−1 h−1, 18.6 ± 0.9 mg L−1 h−1, and 498 mg h−1, respectively. The recirculation rate affects the reactor performance through the magnitude of the hydraulic retention time of nutrients on the reactor and the potential electrical energy generated in the reactor. On the other hand, the reactor with initial pH 8 achieved the best performance with the nitrogen and phosphate removal of 24.6% ± 1.6% to 88.4% ± 3.8%, nitrogen and phosphate removal rate of 24.2 ± 2.1 mg L−1 h−1 and 35.3 ± 2.1 mg L−1 h−1, respectively, and the struvite precipitation rate of 900 mg h−1. Furthermore, when the initial pH of wastewater increased from 7 to 8, the struvite precipitation rate increased from 499 to 900 mg−1. However, increasing the initial pH of wastewater from 8 to 9 caused a decrease in struvite precipitation rate from 900 to 656 mg h−1. These results demonstrated that the recirculation rate and initial pH of wastewater control the process of the struvite precipitation process in ACEC technology.

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Section: Resultssupporting

confidence: 83%

Section: Effect Of Initial Ph On Nutrients Removal and Struvite Preci...supporting

confidence: 86%

Nutrient Recovery From Organic-Rich Wastewater Through Struvite Precipitation using Air Cathode Electrocoagulation Technology

Effendi

Baashen

Hidayat

2022

Air, Soil and Water Research

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“…The P recovery efficiencies were between 64% for P1 and 88% for P4 (Table 3). These results for P recovery are consistent with those reported by Brown et al [23], who obtained 80% total P recovery from anaerobically digested manure, using stirred reactors for struvite precipitation, also with MgCl 2 •6H 2 O and at pH 8.7, and using NaOH to control the pH. The results obtained are also in agreement with those reported by Taddeo et al [24], who obtained a P recovery efficiency of approximately 80% from co-digested and raw swine slurry, also using NaOH to obtain pH values of 10, but MgO as the Mg source.…”

Section: P Recoverysupporting

confidence: 93%

Effect of Alkali and Membrane Area on the Simultaneous Recovery of Nitrogen and Phosphorous from Digestate by Membrane Technology and Chemical Precipitation

et al. 2023

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Nutrient recovery from the agri-food sector waste is an increasingly recognized option within the framework of the bioeconomy. Membrane technologies and chemical precipitation are among the best valued options for their economic and practical feasibility. In this study, the combination of gas-permeable membrane (GPM) technology for the recovery of nitrogen (N) and the chemical precipitation for phosphorous (P) recovery from anaerobically digested swine manure is evaluated. This work studies the effect of the membrane area and the addition of alkali on N and P recovery efficiencies. Specifically, two different membrane area ratios (180 and 100 g of N per m2 of membrane) with and without the addition of alkali were studied. High nutrient recovery efficiencies, of 77% for N and 80% for P, were obtained after 10 days of experiment with a ratio of 180 g N per m2 of GPM and the addition of NaOH (1.5 N), along with the precipitant agent (MgCl2) for P precipitation. Hence, a combined configuration was proposed to perform an effective simultaneous recovery of N and P with the minimum amount of membrane needed in a short time.

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“…Further, Weissengruber et al (2018) concluded that potentially toxic element and persistent organic pollutant accumulations would be low to negligible even after 200 yr of struvite application (at 11 kg P ha −1 yr −1 ). In addition to recovery from municipal wastewater, recovery and use (as a fertilizer) of struvite from human urine, livestock urine and manure, and food processing wastes have received considerable attention (Antonini et al, 2012; Achat et al, 2014; Uysal et al, 2014; Katanda et al, 2016; Brown et al, 2018; Katanda et al, 2019; Muhmood et al, 2019). Struvite P recovery potential from municipal and agricultural wastewater ranges from 10 to 99%, depending in part on the process used and the source and P concentration of the waste product (Jordaan et al, 2010; Egle et al, 2016; Peng et al, 2018; Muhmood et al, 2019).…”

Section: Recycling and Recovering Phosphorus From Waste Streams Back mentioning

confidence: 99%

Options for Improved Phosphorus Cycling and Use in Agriculture at the Field and Regional Scales

et al. 2019

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Soil phosphorus (P) cycling in agroecosystems is highly complex, with many chemical, physical, and biological processes affecting the availability of P to plants. Traditionally, P fertilizer recommendations have been made using an insurance‐based approach, which has resulted in the accumulation of P in many intensively managed agricultural soils worldwide and contributed to the widespread water quality issue of eutrophication. To mitigate further environmental degradation and because future P fertilizer supplies are threatened due to finite phosphate rock resources and associated geopolitical and quality issues, there is an immediate need to increase P use efficiency (PUE) in agroecosystems. Through cultivar selection and improved cropping system design, contemporary research suggests that sufficient crop yields could be maintained at reduced soil test P (STP) concentrations. In addition, more efficient P cycling at the field scale can be achieved through agroecosystem management that increases soil organic matter and organic P mineralization and optimizes arbuscular mycorrhizal fungi (AMF) symbioses. This review paper provides a perspective on how agriculture has the potential to utilize plant and microbial traits to improve PUE at the field scale and accordingly, maintain crop yields at lower STP concentrations. It also links with the need to tighten the P cycle at the regional scale, including a discussion of P recovery and recycling technologies, with a particular focus on the use of struvite as a recycled P fertilizer. Guidance on directions for future research is provided. Core Ideas There is an urgent need to increase P use efficiency in agroecosystems. Crop yields could be maintained at lower than recommended soil test P concentrations. Both the quantity and quality of organic matter influence P availability. Further research on ability of organic P to supply P to crops is needed. Struvite has the potential to fill an important niche in P recycling.

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Struvite Precipitation from Anaerobically Digested Dairy Manure

Cited by 16 publications

References 36 publications

Nutrient Recovery From Organic-Rich Wastewater Through Struvite Precipitation using Air Cathode Electrocoagulation Technology

Nutrient Recovery From Organic-Rich Wastewater Through Struvite Precipitation using Air Cathode Electrocoagulation Technology

Effect of Alkali and Membrane Area on the Simultaneous Recovery of Nitrogen and Phosphorous from Digestate by Membrane Technology and Chemical Precipitation

Options for Improved Phosphorus Cycling and Use in Agriculture at the Field and Regional Scales

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