1
|
Yang GW, Lee H, Kim K, Chun SM, Jeong SY, Jung J, Hong YC. Degradation of dissolved sulfide in water using multi-hole dielectric barrier discharge. CHEMOSPHERE 2024; 354:141687. [PMID: 38484990 DOI: 10.1016/j.chemosphere.2024.141687] [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: 11/20/2023] [Revised: 02/14/2024] [Accepted: 03/10/2024] [Indexed: 03/18/2024]
Abstract
Biogas obtained from livestock manure is used as fuel for solid oxide fuel cells. Although H2S is a typical biogas, it is a fatal disadvantage for fuel-cell power generation and, thus, must be removed. In this study, we proposed an effective method for sulfide removal from water using a multi-hole dielectric barrier discharge (DBD) system. In this system, active species, such as ozone, ultraviolet rays, hydroxyl radicals, and hydrogen peroxide, were simultaneously generated. Under optimal conditions, dissolved sulfide (initial concentration: 120 mg/L) was completely degraded within 10 min in air plasma and 6 min in oxygen plasma. Changes in the physical properties of the sulfide-treated water were confirmed by measuring the pH, oxidation-reduction potential, and dissolved oxygen. Results of the by-product analysis showed that sulfide was converted into sulfate by reacting with a large amount of ozone, and the active species were emitted from the multi-hole DBD system. In summary, multi-hole DBD technology has demonstrated merit as a water-contaminant purification technology and for the removal of dissolved sulfide.
Collapse
Affiliation(s)
- Geon Woo Yang
- Institute of Plasma Technology, Korea Institute of Fusion Energy, 37 Dongjansan-ro, Gunsan, Jeollabuk-do, 54004, Republic of Korea; Department of Nano-Bio Mechanical System Engineering, College of Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju, 54896, Republic of Korea
| | - Heejae Lee
- Institute of Plasma Technology, Korea Institute of Fusion Energy, 37 Dongjansan-ro, Gunsan, Jeollabuk-do, 54004, Republic of Korea; Department of Applied Plasma and Quantum Beam Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju, 54896, Republic of Korea
| | - Kangil Kim
- Institute of Plasma Technology, Korea Institute of Fusion Energy, 37 Dongjansan-ro, Gunsan, Jeollabuk-do, 54004, Republic of Korea; KFE-school, University of Science and Technology, 217, Gajeong-ro, Yuseong-gu, Daejoeon, 34113, Republic of Korea
| | - Se Min Chun
- Institute of Plasma Technology, Korea Institute of Fusion Energy, 37 Dongjansan-ro, Gunsan, Jeollabuk-do, 54004, Republic of Korea; Department of Applied Plasma and Quantum Beam Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju, 54896, Republic of Korea
| | - Sang Yun Jeong
- Institute of Plasma Technology, Korea Institute of Fusion Energy, 37 Dongjansan-ro, Gunsan, Jeollabuk-do, 54004, Republic of Korea
| | - Jinmu Jung
- Department of Nano-Bio Mechanical System Engineering, College of Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju, 54896, Republic of Korea
| | - Yong Cheol Hong
- Institute of Plasma Technology, Korea Institute of Fusion Energy, 37 Dongjansan-ro, Gunsan, Jeollabuk-do, 54004, Republic of Korea; KFE-school, University of Science and Technology, 217, Gajeong-ro, Yuseong-gu, Daejoeon, 34113, Republic of Korea.
| |
Collapse
|
2
|
Ali M, Aslam A, Qadeer A, Javied S, Nisar N, Hassan N, Hussain A, Ali B, Iqbal R, Chaudhary T, Alwahibi MS, Elshikh MS. Domestic wastewater treatment by Pistia stratiotes in constructed wetland. Sci Rep 2024; 14:7553. [PMID: 38555358 PMCID: PMC10981706 DOI: 10.1038/s41598-024-57329-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Accepted: 03/18/2024] [Indexed: 04/02/2024] Open
Abstract
The objective of the study was to evaluate the performance of Pistia stratiotes for treatment of domestic wastewater in a free surface water flow constructed wetland. The objective of the study was to evaluate contaminants removal efficiency of the constructed wetland vegetated with P. stratiotes in treatment of domestic wastewater against Hydraulic retention time (HRT) of 10, 20 and 30 days was investigated. This asks for newer and efficient low-cost nature-based water treatment system which along with cost takes into consideration the sustainability of the ecosystem. Five constructed wetland setups improved the wastewater quality and purify it significantly by reducing the TDS by 83%, TSS by 82%, BOD by 82%, COD by 81%, Chloride by 80%, Sulfate by 77%, NH3 by 84% and Total Oil and Grease by 74%. There was an increase in pH of about 11.9%. Color and odor of wastewater was also improved significantly and effectively. It was observed that 30 days' HRT was optimum for the treatment of domestic wastewater. The final effluent was found to be suitable as per national environmental quality standards and recycled for watering plants and crop irrigation but not for drinking purposes. The treatment in constructed wetland system was found to be economical, as the cost of construction only was involved and operational and maintenance cost very minimal. Even this research was conducted on the sole purpose of commuting the efficiency of pollutant removal in short span time.
Collapse
Affiliation(s)
- Majid Ali
- Environmental Sciences Department, The University of Lahore, Lahore, 54000, Pakistan
| | - Ambreen Aslam
- Environmental Sciences Department, The University of Lahore, Lahore, 54000, Pakistan.
| | - Abdul Qadeer
- Mehran University of Engineering and Technology, Jamshoro, 76060, Pakistan
| | - Sabiha Javied
- Environmental Sciences Department, The University of Lahore, Lahore, 54000, Pakistan
| | - Numrah Nisar
- Lahore College for Women University, Lahore, 54000, Pakistan
| | - Nayyer Hassan
- English Department, University of Lahore, Lahore, 54000, Pakistan
| | - Afzal Hussain
- Environmental Sciences Department, The University of Lahore, Lahore, 54000, Pakistan.
| | - Basharat Ali
- Department of Agricultural Engineering, Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan, 64200, Pakistan
| | - Rashid Iqbal
- Department of Agronomy, Faculty of Agriculture and Environment, The Islamia University of Bahawalpur, Bahawalpur, 63100, Pakistan.
| | - Talha Chaudhary
- Faculty of Agricultural and Environmental Sciences, Hungarian University of Agriculture and Life Sciences, Godollo, 2100, Hungary.
| | - Mona S Alwahibi
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. 2455, 11451, Riyadh, Saudi Arabia
| | - Mohamed S Elshikh
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. 2455, 11451, Riyadh, Saudi Arabia
| |
Collapse
|
3
|
Waheed A, Aljundi IH, Baig U. Recovery of Dissolved Hydrogen Sulfide from Various Wastewater Streams Using Membranes and Other Relevant Techniques: A Review. MEMBRANES 2023; 13:646. [PMID: 37505012 PMCID: PMC10385389 DOI: 10.3390/membranes13070646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 06/25/2023] [Accepted: 06/27/2023] [Indexed: 07/29/2023]
Abstract
Given the significance of dissolved H2S, various techniques have been explored in the literature. The current review describes in detail the various membrane-based techniques, such as membrane contactors, for removing dissolved H2S from various wastewater streams. Various types of hydrophobic membranes have been used, with more emphasis placed on PVDF hollow fiber membranes. The hydrophobic membranes do not allow water to pass through, whereas H2S is readily allowed to pass through the membrane at ambient conditions. In addition, the use of monoethanol amine triazine (MEA-Triazine)- based H2S scavengers has also been described in detail, including the possible scavenging mechanism. The possibility of different types of byproducts has also been explained along with the possible routes to get rid of scavenger byproducts, such as apDTZ. The use of peroxy acetic acid has also been explained to oxidize and solubilize apDTZ. Furthermore, the use of vacuum-based dissolved H2S gas has also been described in detail. The application of the Knudsen and bulk diffusion models to the separation of dissolved H2S through the pores of the hollow fibers has also been explained. Finally, the future challenges and possible solutions along with concluding remarks have also been mentioned in the current review.
Collapse
Affiliation(s)
- Abdul Waheed
- Interdisciplinary Research Center for Membranes and Water Security, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
| | - Isam H Aljundi
- Interdisciplinary Research Center for Membranes and Water Security, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
- Chemical Engineering Department, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
| | - Umair Baig
- Interdisciplinary Research Center for Membranes and Water Security, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
| |
Collapse
|
4
|
Silva AFR, Lebron YAR, Moreira VR, Ribeiro LA, Koch K, Amaral MCS. High-retention membrane bioreactors for sugarcane vinasse treatment: Opportunities for environmental impact reduction and wastewater valorization. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 329:117001. [PMID: 36565496 DOI: 10.1016/j.jenvman.2022.117001] [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: 09/04/2022] [Revised: 12/02/2022] [Accepted: 12/06/2022] [Indexed: 06/17/2023]
Abstract
Ethanol production has increased over the years, and Brazil ranking second in the world using sugarcane as the main raw material. However, 10-15 L of vinasse are generated per liter of ethanol produced. Besides large volumes, this wastewater has high polluting potential due to its low pH and high concentrations of organic matter and nutrients. Given the high biodegradability of the organic matter, the treatment of this effluent by anaerobic digestion and membrane separation processes results in the generation of high value-added byproducts such as volatile fatty acids (VFAs), biohydrogen and biogas. Membrane bioreactors have been widely evaluated due to the high efficiency achieved in vinasse treatment. In recent years, high retention membrane bioreactors, in which high retention membranes (nanofiltration, reverse osmosis, forward osmosis and membrane distillation) are combined with biological processes, have gained increasing attention. This paper presents a critical review focused on high retention membrane bioreactors and the challenges associated with the proposed configurations. For nanofiltration membrane bioreactor (NF-MBR), the main drawback is the higher fouling propensity due to the hydraulic driving force. Nonetheless, the development of membranes with high permeability and anti-fouling properties is uprising. Regarding osmotic membrane bioreactor (OMBR), special attention is needed for the selection of a proper draw solution, which desirably should be low cost, have high osmolality, reduce reverse salt flux, and can be easily reconcentrated. Membrane distillation bioreactor (MDBR) also exhibit some shortcomings, with emphasis on energy demand, that can be solved with the use of low-grade and residual heat, or renewable energies. Among the configurations, MDBR seems to be more advantageous for sugarcane vinasse treatment due to the lower energy consumption provided by the use of waste heat from the effluent, and due to the VFAs recovery, which has high added value.
Collapse
Affiliation(s)
- A F R Silva
- Department of Sanitary and Environmental Engineering, Federal University of Minas Gerais, Belo Horizonte, Brazil.
| | - Y A R Lebron
- Department of Sanitary and Environmental Engineering, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - V R Moreira
- Department of Sanitary and Environmental Engineering, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - L A Ribeiro
- Department of Sanitary and Environmental Engineering, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - K Koch
- Chair of Urban Water Systems Engineering, Technical University of Munich, Garching, Germany
| | - M C S Amaral
- Department of Sanitary and Environmental Engineering, Federal University of Minas Gerais, Belo Horizonte, Brazil
| |
Collapse
|
5
|
Centeno Mora E, de Lemos Chernicharo CA. Simultaneous removal of dissolved sulphide and dissolved methane from anaerobic effluents with hollow fibre membrane contactors. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:90549-90566. [PMID: 35871195 DOI: 10.1007/s11356-022-22074-0] [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: 04/21/2022] [Accepted: 07/13/2022] [Indexed: 06/15/2023]
Abstract
Dissolved gases in the effluent of anaerobic reactors, specifically dissolved methane (D-CH4) and sulphide (S2-), are a drawback for anaerobic-based sewage treatment plants (STPs). This article studied the simultaneous desorption/removal of both gases from anaerobic effluents with hollow fibre membrane contactors (HFMCs), evaluating two types of membrane materials (e.g. microporous and dense) at different operating conditions (atmospheric air as sweeping gas or vacuum, and different gas/liquid flows and vacuum pressures). The transfer of other gases, such as O2 and CO2, was studied as well. Desorption/removal efficiencies up to 99% for D-CH4 and 100% for S2- were obtained, with the higher efficiencies reported for the dense HFMC and with air as sweeping gas. It was found that the removal mechanism for S2- was oxidation with O2 from the air. In addition, the use of air as sweeping gas allowed the obtention of a nearly O2 saturated effluent, with more elevated dissolved oxygen concentrations in the microporous HFMC. Finally, it was found that the higher mass-transfer resistance in the dense membrane was compensated by a better performance in the liquid phase (lower mass-transfer resistance) in this unit, which allowed better D-CH4 desorption efficiencies.
Collapse
Affiliation(s)
- Erick Centeno Mora
- Department of Sanitary and Environmental Engineering, Federal University of Minas Gerais (UFMG), Belo Horizonte, Brazil.
- School of Civil Engineering, University of Costa Rica (UCR), San José, Costa Rica.
| | | |
Collapse
|
6
|
Carpanez T, Moreira V, Magalhães N, Assis I, Lange L, Amaral M. Integrated membrane-based processes to obtain organo-mineral fertilizer, water, and energy from sugarcane vinasse. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.122180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
7
|
Maie N, Anzai S, Tokai K, Kakino W, Taruya H, Ninomiya H. Using oxygen/ozone nanobubbles for in situ oxidation of dissolved hydrogen sulfide at a residential tunnel-construction site. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 302:114068. [PMID: 34773779 DOI: 10.1016/j.jenvman.2021.114068] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 11/01/2021] [Accepted: 11/03/2021] [Indexed: 06/13/2023]
Abstract
Hydrogen sulfide (H2S) is a toxic gas, and considerable research has been conducted for its control and removal from industrial wastewater and sewage water. However, no simple and practical technology is available for degrading H2S in situ at tunnel constructing sites. On May 11, 2020, an H2S blowout accident occurred in underground soil at a residential sewer-tunnel construction site in Iwakuni City, Yamaguchi Prefecture, Japan, filling the tunnel with high concentrations of H2S gas, causing the fatality of one worker owing to emphysema. River water flowing near the site was immediately introduced into the tunnel to trap the H2S gas, generating 652-m3 water that contained high concentrations (120 mg/L) of dissolved H2S in the tunnel. To safely and quickly remove H2S in situ, the contaminated water was treated with high-density oxygen and ozone nanobubbles (O2/O3-HDNBs) generated using the ultrafine pore method. Consequently, H2S was removed from the contaminated water in 3 days. This is the first successful application of O2/O3-HDNB technology for the in situ oxidation of H2S in environmental water at a construction site. This study reports the practical application of this advanced technology and the system performance.
Collapse
Affiliation(s)
- Nagamitsu Maie
- School of Veterinary Medicine, Kitasato University, 23-35-1 Higashi, Towada, 034-8628, Aomori, Japan.
| | - Satoshi Anzai
- Anzai-Kantetsu Inc., 3-1-16 Komaoka, Tsurumi-ku, Yokohama, 230-0071, Kanagawa, Japan
| | - Kengo Tokai
- Nittoc Construction Co., Ltd., 3-10-6 Higashi-Nihonbashi, Chuo-ku, 103-0004, Tokyo, Japan
| | - Wataru Kakino
- School of Veterinary Medicine, Kitasato University, 23-35-1 Higashi, Towada, 034-8628, Aomori, Japan
| | - Hiroyuki Taruya
- School of Veterinary Medicine, Kitasato University, 23-35-1 Higashi, Towada, 034-8628, Aomori, Japan
| | - Hideki Ninomiya
- Yamaguchi Earth Engineering Coop., 2-3-13 Hirano, Yamaguchi, 753-0015, Yamaguchi, Japan
| |
Collapse
|
8
|
Silva AFR, Brasil YL, Koch K, Amaral MCS. Resource recovery from sugarcane vinasse by anaerobic digestion - A review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 295:113137. [PMID: 34198179 DOI: 10.1016/j.jenvman.2021.113137] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 06/16/2021] [Accepted: 06/19/2021] [Indexed: 06/13/2023]
Abstract
The increase in biofuel production by 2030, driven by the targets set at the 21st United Nations Framework Convention on Climate Change (COP21), will promote an increase in ethanol production, and consequently more vinasse generation. Sugarcane vinasse, despite having a high polluting potential due to its high concentration of organic matter and nutrients, has the potential to produce value-added resources such as volatile fatty acids (VFA), biohydrogen (bioH2) and biomethane (bioCH4) from anaerobic digestion. The objective of this paper is to present a critical review on the vinasse treatment by anaerobic digestion focusing on the final products. Effects of operational parameters on production and recovery of these resources, such as pH, temperature, retention time and type of inoculum were addressed. Given the importance of treating sugarcane vinasse due to its complex composition and high volume generated in the ethanol production process, this is the first review that evaluates the production of VFAs, bioH2 and bioCH4 in the treatment of this organic residue. Also, the challenges of the simultaneous production of VFA, bioH2 and bioCH4 and resources recovery in the wastewater streams generated in flex-fuel plants, using sugarcane and corn as raw material in ethanol production, are presented. The installation of flex-fuel plants was briefly discussed, with the main impacts on the treatment process of these effluents either jointly or simultaneously, depending on the harvest season.
Collapse
Affiliation(s)
- A F R Silva
- Department of Sanitary and Environmental Engineering, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Y L Brasil
- Department of Sanitary and Environmental Engineering, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - K Koch
- Chair of Urban Water Systems Engineering, Department of Civil, Geo and Environmental Engineering, Technical University of Munich, Munich, Germany
| | - M C S Amaral
- Department of Sanitary and Environmental Engineering, Federal University of Minas Gerais, Belo Horizonte, Brazil.
| |
Collapse
|
9
|
Mohd Ramli MR, Mat Radzi NH, Mohamad Esham MI, Alsebaeai MK, Ahmad AL. Advanced Application and Fouling Control in Hollow Fibre Direct Contact Membrane Distillation (HF-DCMD). ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2021. [DOI: 10.1007/s13369-020-05006-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
10
|
Sustainable ammonia resource recovery from landfill leachate by solar-driven modified direct contact membrane distillation. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.118356] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
|
11
|
Nechifor AC, Cotorcea S, Bungău C, Albu PC, Pașcu D, Oprea O, Grosu AR, Pîrțac A, Nechifor G. Removing of the Sulfur Compounds by Impregnated Polypropylene Fibers with Silver Nanoparticles-Cellulose Derivatives for Air Odor Correction. MEMBRANES 2021; 11:256. [PMID: 33916200 PMCID: PMC8067035 DOI: 10.3390/membranes11040256] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Accepted: 03/29/2021] [Indexed: 12/16/2022]
Abstract
The unpleasant odor that appears in the industrial and adjacent waste processing areas is a permanent concern for the protection of the environment and, especially, for the quality of life. Among the many variants for removing substance traces, which give an unpleasant smell to the air, membrane-based methods or techniques are viable options. Their advantages consist of installation simplicity and scaling possibility, selectivity; moreover, the flows of odorous substances are direct, automation is complete by accessible operating parameters (pH, temperature, ionic strength), and the operation costs are low. The paper presents the process of obtaining membranes from cellulosic derivatives containing silver nanoparticles, using accessible raw materials (namely motion picture films from abandoned archives). The technique used for membrane preparation was the immersion precipitation for phase inversion of cellulosic polymer solutions in methylene chloride: methanol, 2:1 volume. The membranes obtained were morphologically and structurally characterized by scanning electron microscopy (SEM) and high resolution SEM (HR SEM), energy dispersive X-ray analysis (EDAX), Fourier transform infrared spectrometry (FTIR), thermal analysis (TG, ATD). Then, the membrane performance process (extraction efficiency and species flux) was determined using hydrogen sulfide (H2S) and ethanethiol (C2H5SH) as target substances.
Collapse
Affiliation(s)
- Aurelia Cristina Nechifor
- Department of Analytical Chemistry and Environmental Engineering, University Politehnica of Bucharest, 1-7 Gheorghe Polizu St., 011061 Bucharest, Romania; (A.C.N.); (S.C.); (D.P.); (A.P.); (G.N.)
| | - Simona Cotorcea
- Department of Analytical Chemistry and Environmental Engineering, University Politehnica of Bucharest, 1-7 Gheorghe Polizu St., 011061 Bucharest, Romania; (A.C.N.); (S.C.); (D.P.); (A.P.); (G.N.)
| | - Constantin Bungău
- Department of Engineering and Management, Faculty of Management and Technological Engineering, University of Oradea, 410087 Oradea, Romania;
| | - Paul Constantin Albu
- Department of Radioisotopes and Radiation Metrology, IFIN Horia Hulubei, 30 Reactorului St., 023465 Magurele, Romania;
| | - Dumitru Pașcu
- Department of Analytical Chemistry and Environmental Engineering, University Politehnica of Bucharest, 1-7 Gheorghe Polizu St., 011061 Bucharest, Romania; (A.C.N.); (S.C.); (D.P.); (A.P.); (G.N.)
| | - Ovidiu Oprea
- Department of Inorganic Chemistry, Physical Chemistry and Electrochemistry, University Politehnica of Bucharest, 1-7 Gheorghe Polizu St., 011061 Bucharest, Romania;
| | - Alexandra Raluca Grosu
- Department of Analytical Chemistry and Environmental Engineering, University Politehnica of Bucharest, 1-7 Gheorghe Polizu St., 011061 Bucharest, Romania; (A.C.N.); (S.C.); (D.P.); (A.P.); (G.N.)
| | - Andreia Pîrțac
- Department of Analytical Chemistry and Environmental Engineering, University Politehnica of Bucharest, 1-7 Gheorghe Polizu St., 011061 Bucharest, Romania; (A.C.N.); (S.C.); (D.P.); (A.P.); (G.N.)
| | - Gheorghe Nechifor
- Department of Analytical Chemistry and Environmental Engineering, University Politehnica of Bucharest, 1-7 Gheorghe Polizu St., 011061 Bucharest, Romania; (A.C.N.); (S.C.); (D.P.); (A.P.); (G.N.)
| |
Collapse
|
12
|
Lee E, Rout PR, Kyun Y, Bae J. Process optimization and energy analysis of vacuum degasifier systems for the simultaneous removal of dissolved methane and hydrogen sulfide from anaerobically treated wastewater. WATER RESEARCH 2020; 182:115965. [PMID: 32673861 DOI: 10.1016/j.watres.2020.115965] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 05/11/2020] [Accepted: 05/19/2020] [Indexed: 05/25/2023]
Abstract
The control of dissolved methane (CH4) and hydrogen sulfide (H2S) emissions in anaerobic effluents is essential for minimizing the environmental implications of greenhouse gases, odor, and carbon footprint, as well as for preventing energy loss in the form of unrecovered dissolved methane. This study assessed the feasibility of a vacuum degasifier for the removal of CH4 and H2S from staged anaerobic fluidized membrane bioreactor (SAF-MBR) effluent. The optimization results showed that the efficiency of the nozzle fitted degasifiers were superior to the media packed ones. In three-stage vacuum degasifiers at a -0.8 bar vacuum pressure, H2S removal was mostly pH dependent and 88% removal efficiency was achieved with an initial concentration of 13.6 mg/L. Methane removal was dependent primarily on the number of degasifier units, and approximately 94% efficiency was achieved in a three-stage degasifier. Energy balance analysis showed that energy production exceeded the system energy requirements with 0.05-0.07 kWh/m3 of surplus energy. These results provide deep insights into this new technology for simultaneous removal of dissolved CH4 and H2S, which can be referred for potential future applications.
Collapse
Affiliation(s)
- Eunseok Lee
- Department of Environmental Engineering, Inha University, Inharo 100, Michuhol-gu, Incheon, Republic of Korea
| | - Prangya Ranjan Rout
- Department of Environmental Engineering, Inha University, Inharo 100, Michuhol-gu, Incheon, Republic of Korea
| | - Yongduk Kyun
- Department of Environmental Engineering, Inha University, Inharo 100, Michuhol-gu, Incheon, Republic of Korea
| | - Jaeho Bae
- Department of Environmental Engineering, Inha University, Inharo 100, Michuhol-gu, Incheon, Republic of Korea.
| |
Collapse
|