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Rodríguez-Alegre R, Zapata-Jiménez J, You X, Pérez-Moya M, Sanchis S, García-Montaño J. Nutrient recovery and valorisation from pig slurry liquid fraction with membrane technologies. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 874:162548. [PMID: 36870507 PMCID: PMC10060121 DOI: 10.1016/j.scitotenv.2023.162548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 02/15/2023] [Accepted: 02/25/2023] [Indexed: 05/21/2023]
Abstract
Livestock slurry has been reported to be a potential secondary raw material as it contains macronutrients ‑nitrogen, phosphorus and potassium-, which could be valorised as high-quality fertilizers if proper separation and concentration of valuable compounds is performed. In this work, pig slurry liquid fraction was assessed for nutrient recovery and valorisation as fertilizer. Some indicators were used to evaluate the performance of proposed train of technologies within the framework of circular economy. As ammonium and potassium species are highly soluble at the whole pH range, a study based on phosphate speciation at pH from 4 to 8 was assessed to improve the macronutrients recovery from the slurry, resulting in two different treatment trains at acidic and alkaline conditions. The acidic treatment system based on centrifugation, microfiltration and forward osmosis was applied to obtain a nutrient-rich liquid organic fertilizer containing 1.3 % N, 1.3 % P2O5 and 1.5 % K2O. The alkaline path of valorisation was composed by centrifugation and stripping by using membrane contactors to produce an organic solid fertilizer -7.7 % N, 8,0 % P2O5 and 2.3 % K2O-, ammonium sulphate solution -1.4 % N- and irrigation water. In terms of circularity indicators, 45.8 % of the initial water content and <50 % of contained nutrients were recovered - 28.3 % N, 43.5 % P2O5 and 46.6 % K2O - in the acidic treatment resulting in 68.68 g fertilizer per kg of treated slurry. 75.1 % of water was recovered as irrigation water and 80.6 % N, 99.9 % P2O5, 83.4 % K2O was valorised in the alkaline treatment, as 219.60 g fertilizer per kg of treated slurry. Treatment paths at acidic and alkaline conditions yield promising results for nutrients recovery and valorisation as the obtained products (nutrient rich organic fertilizer, solid soil amendment and ammonium sulphate solution) fulfil the European Regulation for fertilizers to be potentially used in crop fields.
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Affiliation(s)
- Rubén Rodríguez-Alegre
- Leitat Technological Center, Circular Economy department, C/ de La Innovació 2, 08225 Terrassa, Barcelona, Spain; Universitat Politécnica de Catalunya, Chemical Engineering department, C/ Eduard Maristany 10-14, Campus Diagonal-Besòs, 08019 Barcelona, Spain.
| | - Julia Zapata-Jiménez
- Leitat Technological Center, Circular Economy department, C/ de La Innovació 2, 08225 Terrassa, Barcelona, Spain.
| | - Xialei You
- Leitat Technological Center, Circular Economy department, C/ de La Innovació 2, 08225 Terrassa, Barcelona, Spain.
| | - Montserrat Pérez-Moya
- Universitat Politécnica de Catalunya, Chemical Engineering department, C/ Eduard Maristany 10-14, Campus Diagonal-Besòs, 08019 Barcelona, Spain.
| | - Sonia Sanchis
- Leitat Technological Center, Circular Economy department, C/ de La Innovació 2, 08225 Terrassa, Barcelona, Spain.
| | - Julia García-Montaño
- Leitat Technological Center, Circular Economy department, C/ de La Innovació 2, 08225 Terrassa, Barcelona, Spain.
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Cheng H, Qin H, Liang L, Li YY, Liu J. Towards advanced simultaneous nitrogen removal and phosphorus recovery from digestion effluent based on anammox-hydroxyapatite (HAP) process: Focusing on a solution perspective. BIORESOURCE TECHNOLOGY 2023; 381:129117. [PMID: 37141995 DOI: 10.1016/j.biortech.2023.129117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 04/21/2023] [Accepted: 04/27/2023] [Indexed: 05/06/2023]
Abstract
In this paper, the state-of-the-art information on the anammox-HAP process is summarized. The mechanism of this process is systematically expounded, the enhancement of anammox retention by HAP precipitation and the upgrade of phosphorus recovery by anammox process are clarified. However, this process still faces several challenges, especially how to deal with the ∼ 11% nitrogen residues and to purify the recovered HAP. For the first time, an anaerobic fermentation (AF) combined with partial denitrification (PD) and anammox-HAP (AF-PD-Anammox-HAP) process is proposed to overcome the challenges. By AF of the organic impurities of the anammox-HAP granular sludge, organic acid is produced to be used as carbon source for PD to remove the nitrogen residues. Simultaneously, pH of the solution drops, which promotes the dissolution of some inorganic purities such as CaCO3. In this way, not only the inorganic impurities are removed, but the inorganic carbon is supplied for anammox bacteria.
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Affiliation(s)
- Hui Cheng
- School of Environmental and Chemical Engineering, Shanghai University, 333 Nanchen Road, Shanghai 200444, China
| | - Haojie Qin
- School of Environmental and Chemical Engineering, Shanghai University, 333 Nanchen Road, Shanghai 200444, China
| | - Lei Liang
- School of Environmental and Chemical Engineering, Shanghai University, 333 Nanchen Road, Shanghai 200444, China
| | - Yu-You Li
- Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aoba, Aramaki-Aza, Sendai, Miyagi 980-8579, Japan
| | - Jianyong Liu
- School of Environmental and Chemical Engineering, Shanghai University, 333 Nanchen Road, Shanghai 200444, China.
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Mendoza E, Magrí A, Blandin G, Bayo À, Vosse J, Buttiglieri G, Colprim J, Comas J. Second-Generation Magnesium Phosphates as Water Extractant Agents in Forward Osmosis and Subsequent Use in Hydroponics. MEMBRANES 2023; 13:226. [PMID: 36837730 PMCID: PMC9961049 DOI: 10.3390/membranes13020226] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 02/03/2023] [Accepted: 02/08/2023] [Indexed: 06/18/2023]
Abstract
The recovery of nutrients from wastewater streams for their later use in agricultural fertilization is an interesting approach. Wastewater recovered magnesium phosphate (MgP) salts were used in a forward osmosis (FO) system as draw solution in order to extract water and to produce a nutrient solution to be used in a hydroponic system with lettuces (Lactuca sativa, L.). Owing to the low solubility of the MgP salts (i.e., struvite, hazenite and cattiite) in water, acid dissolution was successfully tested using citric and nitric acids to reach pH 3.0. The dilution by FO of the dissolved salts reached levels close to those needed by a hydroponic culture. Ion migration through the membrane was medium to high, and although it did not limit the dilution potential of the system, it might decrease the overall feasibility of the FO process. Functional growth of the lettuces in the hydroponic system was achieved with the three MgP salts using the recovered water as nutrient solution, once properly supplemented with nutrients with the desired concentrations. This is an innovative approach for promoting water reuse in hydroponics that benefits from the use of precipitated MgP salts as a nutrient source.
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Affiliation(s)
- Esther Mendoza
- ICRA-CERCA, Catalan Institute for Water Research, Emili Grahit 101, 17003 Girona, Spain
- University of Girona, 17004 Girona, Spain
| | - Albert Magrí
- LEQUIA, Institute of the Environment, University of Girona, Campus Montilivi, Carrer Maria Aurèlia Capmany 69, 17003 Girona, Spain
| | - Gaëtan Blandin
- LEQUIA, Institute of the Environment, University of Girona, Campus Montilivi, Carrer Maria Aurèlia Capmany 69, 17003 Girona, Spain
| | - Àlex Bayo
- LEQUIA, Institute of the Environment, University of Girona, Campus Montilivi, Carrer Maria Aurèlia Capmany 69, 17003 Girona, Spain
| | - Josephine Vosse
- ICRA-CERCA, Catalan Institute for Water Research, Emili Grahit 101, 17003 Girona, Spain
- University of Girona, 17004 Girona, Spain
| | - Gianluigi Buttiglieri
- ICRA-CERCA, Catalan Institute for Water Research, Emili Grahit 101, 17003 Girona, Spain
- University of Girona, 17004 Girona, Spain
| | - Jesús Colprim
- LEQUIA, Institute of the Environment, University of Girona, Campus Montilivi, Carrer Maria Aurèlia Capmany 69, 17003 Girona, Spain
| | - Joaquim Comas
- ICRA-CERCA, Catalan Institute for Water Research, Emili Grahit 101, 17003 Girona, Spain
- LEQUIA, Institute of the Environment, University of Girona, Campus Montilivi, Carrer Maria Aurèlia Capmany 69, 17003 Girona, Spain
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Lapinkangas S, Rautio L, Kauppinen T, Hu T, Pesonen J, Lassi U. Precipitation of potassium as hazenite from washing water of spent alkaline batteries. CHEMICAL ENGINEERING JOURNAL ADVANCES 2022. [DOI: 10.1016/j.ceja.2022.100426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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