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Qiang H, Liu Z, Yin X, Guo Z, Duan Y, Liu W, Yue X, Zhou A. Efficient phosphate and hydrogen recovery from sludge fermentation liquid by sacrificial iron anode in electro-fermentation system. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 360:121110. [PMID: 38733846 DOI: 10.1016/j.jenvman.2024.121110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Revised: 03/22/2024] [Accepted: 05/05/2024] [Indexed: 05/13/2024]
Abstract
Electro-fermentation (EF) has been extensively studied for recovering hydrogen and phosphorus from waste activated sludge (WAS), while was limited for the further application due to the low hydrogen yield and phosphorus recovery efficiency. This study proposed an efficient strategy for hydrogen and vivianite recovery from the simulated sludge fermentation liquid by sacrificial iron anode in EF. The optimum hydrogen productivity and the utilization efficiency of short chain fatty acids (SCFAs) reached 45.2 mmol/g COD and 77.6% at 5 d in pH 8. Phosphate removal efficiency achieved at 90.8% at 2 d and the high crystallinity and weight percentage of vivianite (84.8%) was obtained. The functional microbes, i.e., anaerobic fermentative bacteria, electrochemical active bacteria, homo-acetogens and iron-reducing bacteria were highly enriched and the inherent interaction between the microbial consortia and environmental variables was thoroughly explored. This work may provide a theoretical basis for energy/resource recovery from WAS in the further implementation.
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Affiliation(s)
- Haifeng Qiang
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, China
| | - Zhihong Liu
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, China; Shanxi Academy of Advanced Research and Innovation, Taiyuan, 030006, China.
| | - Xiaoyun Yin
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, China
| | - Zhengtong Guo
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, China
| | - Yanqing Duan
- Department of Environmental and Safety Engineering, Taiyuan Institute of Technology, Taiyuan, 030800, China
| | - Wenzong Liu
- Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen, 518055, China
| | - Xiuping Yue
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, China; Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, Taiyuan, 030000, China
| | - Aijuan Zhou
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, China; Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, Taiyuan, 030000, China.
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Hamed A, Ashraf S, Mostafa MS, Khalaf M, Yousef H, Mourad I. Development of nanofibrous scaffolds containing polylactic acid modified with turmeric and hydroxyapatite/vivianite nanoparticles for wound dressing applications. Int J Biol Macromol 2024; 259:128624. [PMID: 38061519 DOI: 10.1016/j.ijbiomac.2023.128624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 11/25/2023] [Accepted: 12/02/2023] [Indexed: 01/14/2024]
Abstract
Damaging the outer layer of the body (the skin) has been a common issue for decades. Fabrication of nanofibrous membranes via the electrospinning technique for the sake of making the wound healing process more facile has caught a lot of interest. For this purpose, a polymeric scaffold of polylactic acid (PLA) was doped with nanoparticles with different concentrations of turmeric/hydroxyapatite/vivianite/graphene oxide. The obtained membrane was tested by XRD, SEM, FTIR, and XPS. The surface topography of the scaffold has experienced changes upon adding different concentrations of the nanoparticles. The contact angle was measured by water droplets. It accentuated change in CA starting from 43.9o for pure condition of PLA to 67.7o for PLA/turmeric/vivianite. The thermogravimetric analysis (TGA) test stated that the PLA scaffold features are thermally stable in relatively high-temperature conditions initiating from room temperature to about 300 °C, meeting the maximum loss in mass of about 5 %. The cell viability was carried out in prepared vitro for the sample which contains PLA/turmeric/vivianite/GO, it was elucidated that the IC50 was around 3060 μg/ml.
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Affiliation(s)
- Amr Hamed
- Department of Physics, Faculty of Science, Suez University, Suez 43518, Egypt
| | - Sherif Ashraf
- Department of Physics, Faculty of Science, Suez University, Suez 43518, Egypt.
| | - Mervat S Mostafa
- Faculty of Nanotechnology for Postgraduate Studies, Cairo University, El-Sheikh Zayed 12588, Egypt; Science and Technology Center of Excellence (STCE), Ministry of Military Production, Cairo, Egypt
| | - Mohamed Khalaf
- Science and Technology Center of Excellence (STCE), Ministry of Military Production, Cairo, Egypt
| | - Hesham Yousef
- Department of Physics, Faculty of Science, Suez University, Suez 43518, Egypt
| | - Ibrahim Mourad
- Department of Physics, Faculty of Science, Suez University, Suez 43518, Egypt
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Wang SN, Cao JS, Luo JY, Ni BJ, Fang F. Revealing the mechanism of quartz sand seeding in accelerating phosphorus recovery from anaerobic fermentation supernatant through vivianite crystallization. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 348:119223. [PMID: 37827085 DOI: 10.1016/j.jenvman.2023.119223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 09/14/2023] [Accepted: 10/02/2023] [Indexed: 10/14/2023]
Abstract
The recovery of phosphorus (P) through vivianite crystallization offers a promising approach for resource utilization in wastewater treatment plants. However, this process encounters challenges in terms of small product size and low purity. The study aimed to assess the feasibility of using quartz sand as a seed material to enhance P recovery and vivianite crystal characteristics from anaerobic fermentation supernatant. Various factors, including seed dosage, seed size, Fe/P ratio, and pH, were systematically tested in batch experiments to assess their influence. Results demonstrated that the effect of seed enhancement on vivianite crystallization was more pronounced under higher seed dosages, smaller seed sizes, and lower pH or Fe/P ratio. The addition of seeds increased P recovery by 4.43% in the actual anaerobic fermentation supernatant and also augmented the average particle size of the recovered product from 19.57 to 39.28 μm. Moreover, introducing quartz sand as a seed material effectively reduced co-precipitation, leading to a notable 12.5% increase in the purity of the recovered vivianite compared to the non-seeded process. The formation of an ion adsorption layer on the surface of quartz sand facilitated crystal attachment and growth, significantly accelerating the vivianite crystallization rate and enhancing P recovery. The economic analysis focused on chemical costs further affirmed the economic viability of using quartz sand as a seed material for P recovery through vivianite crystallization, which provides valuable insights for future research and engineering applications.
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Affiliation(s)
- Su-Na Wang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China
| | - Jia-Shun Cao
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China
| | - Jing-Yang Luo
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China
| | - Bing-Jie Ni
- Centre for Technology in Water and Wastewater (CTWW), School of Civil and Environmental Engineering, University of Technology Sydney (UTS), Sydney, NSW 2007, Australia
| | - Fang Fang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China.
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Zhang Y, Qin J, Chen Z, Chen Y, Zheng X, Guo L, Wang X. Efficient removal and recovery of phosphorus from industrial wastewater in the form of vivianite. ENVIRONMENTAL RESEARCH 2023; 228:115848. [PMID: 37024026 DOI: 10.1016/j.envres.2023.115848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 03/20/2023] [Accepted: 04/03/2023] [Indexed: 05/16/2023]
Abstract
With the shortage of phosphorus resources, the concept of phosphorus recovery from wastewater is generally proposed. Recently, phosphorus recovery from wastewater in the form of vivianite has been widely reported, which could be used as a slow-release fertilizer as well as the production of lithium iron phosphate for Li-ion batteries. In this study, chemical precipitation thermodynamic modeling was applied to evaluate the effect of solution factors on vivianite crystallization with actual phosphorus containing industrial wastewater. The modeling results showed that the solution pH influences the concentration of diverse ions, and the initial Fe2+ concentration affects the formation area of vivianite. The saturation index (SI) of vivianite increased with the initial Fe2+ concentration and Fe:P molar ratio. pH 7.0, initial Fe2+ concentration 500 mg/L and Fe:P molar ratio 1.50 were the optimal conditions for phosphorus recovery. Mineral Liberation Analyzer (MLA) accurately determined the purity of vivianite was 24.13%, indicating the feasibility of recovering vivianite from industrial wastewater. In addition, the cost analysis showed that the cost of recovering phosphorus by the vivianite process was 0.925 USD/kg P, which can produce high-value vivianite products and realize "turn waste into treasure".
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Affiliation(s)
- Yangzhong Zhang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China.
| | - Jiafu Qin
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China.
| | - Zhenguo Chen
- School of Environment, South China Normal University, Guangzhou, 510006, China; Hua An Biotech Co., Ltd., Foshan, 528300, China.
| | - Yongxing Chen
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China.
| | - Xuwen Zheng
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China; Hua An Biotech Co., Ltd., Foshan, 528300, China.
| | - Lu Guo
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China.
| | - Xiaojun Wang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China; Hua An Biotech Co., Ltd., Foshan, 528300, China.
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