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Jia S, Diao Y, Li Y, Zhang J, Han H, Li G, Pei Y. Microbiological interpretation of weak ultrasound enhanced biological wastewater treatment - using Escherichia coli degrading glucose as model system. BIORESOURCE TECHNOLOGY 2024; 403:130873. [PMID: 38782192 DOI: 10.1016/j.biortech.2024.130873] [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: 03/28/2024] [Revised: 05/19/2024] [Accepted: 05/20/2024] [Indexed: 05/25/2024]
Abstract
The Escherichia coli (E.coli) degrading glucose irradiated by ultrasound irradiation (20 W, 14 min) was investigated as the model system, the glucose degradation increased by 13 % while the E.coli proliferation decreased by 10 % after culture for 18 h. It indicated a tradeoff effect between substrate degradation and cell proliferation, which drove the enhanced contaminants removal and excess sludge reduction in a weak ultrasound enhanced biological wastewater treatment. The enzymatic activities (catalase, superoxide dismutase, adenosine triphosphatases, lactic dehydrogenase, membrane permeability, intracellular reactive oxygen species and calcium ion of E. coli increased immediately by 12 %, 63 %, 124 %, 19 %, 15 %, 4-fold and 38-fold, respectively by ultrasound irradiation power of 20 W for 14 min. Furthermore, the membrane permeability of irradiated E. coli increased by 26 % even though the ultrasound stopped for 10 h. Additionally, pathways associated with glucose degradation and cell proliferation were continuously up-regulated and down-regulated, respectively.
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Affiliation(s)
- Shengyong Jia
- School of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, China
| | - Yanfang Diao
- School of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, China
| | - Yingying Li
- School of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, China
| | - Jingshen Zhang
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, China; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Hongjun Han
- State Key Laboratory of Urban Water Resource & Environment, Harbin Institute of Technology, Harbin 150090, China.
| | - Guirong Li
- School of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, China
| | - Yuanhu Pei
- Henan Qingshuiyuan Technology Co., Ltd, Jiyuan 454650, China
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2
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Rahimi Z, Zinatizadeh AA, Zinadini S, van Loosdrecht M, JBatstone D. Concurrent removal of carbon and nutrients in a one-stage dual internal circulation airlift A2O bioreactor from milk processing industrial wastewater: Process optimization, sludge characteristics and operating cost evaluation. CHEMOSPHERE 2024; 355:141804. [PMID: 38548077 DOI: 10.1016/j.chemosphere.2024.141804] [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: 12/06/2023] [Revised: 03/01/2024] [Accepted: 03/24/2024] [Indexed: 04/04/2024]
Abstract
In this work, a one-stage dual internal circulation airlift anaerobic/anoxic/aerobic (DCAL-A2O) bioreactor was continuously operated for concurrent removal of nutrients and organics from milk processing wastewater (MPW). Special configuration of the airlift A2O bioreactor created possibility of the formation of desired anaerobic, anoxic and aerobic zones in a single unit. The process functionality of the bioreactor was examined under three influential operating variables i.e. hydraulic retention time (HRT; 7-15 h), air flow rate (AFR; 1-3 L/min) and aerobic volume ratio (AVR; 0.324-0.464). The optimum region was identified at HRT of 13h, AFR of 2L/min and AVR of 0.437, leading to TCOD, TN and TP removal efficiency of 94.5 %, 59.6 %, and 62.2 %, respectively, and effluent turbidity of 8 NTU. The impact of feed biodegradability on the process performance of the bioreactor treating the MPW, soft drink wastewater (SDW) and soybean oil plant wastewater (SOW) was also assessed. From the results, the feed characteristics affected significantly the nutrients removal. Moreover, the feeding location played an effective role in the nutrient removal while treating the MPW at optimum operating conditions. In this study, the change in residual organic matters as soluble microbial products (SMP) was monitored at various operating conditions. In addition, the impact of SMP extracted from sludge, extracellular polymeric substances (EPS) comprising of loosely bound EPS (LB-EPS) and tightly bound EPS (TB-EPS) was analyzed on sludge characteristics as bio-flocculation and settleability properties. According to the obtained data, the increase in operating variables led to the reduction in contents of effluent SMP, sludge SMP, LB-EPS, turbidity, and SVI, thereby, the enhancement in the sludge characteristics. Meanwhile, analysis of microbial communities verified the presence of various functional bacterial species. The cost operating evaluation confirmed the cost effectiveness of the airlift A2O bioreactor in reduction of energy consumption for the MPW treatment.
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Affiliation(s)
- Zahra Rahimi
- Department of Applied Chemistry, Faculty of Chemistry, Razi University, P.O. Box 67144-14971, Kermanshah, Iran
| | - Ali Akbar Zinatizadeh
- Department of Applied Chemistry, Faculty of Chemistry, Razi University, P.O. Box 67144-14971, Kermanshah, Iran; Australian Centre for Water and Environmental Biotechnology (ACWEB, Formerly AWMC), Gehrmann Building, The University of Queensland, St. Lucia, 4072, Brisbane, Australia.
| | - Sirus Zinadini
- Department of Applied Chemistry, Faculty of Chemistry, Razi University, P.O. Box 67144-14971, Kermanshah, Iran
| | - Mark van Loosdrecht
- Department of Biotechnology, Delft University of Technology, Julianalaan 67, 2628 BC, Delft, the Netherlands
| | - Damien JBatstone
- Australian Centre for Water and Environmental Biotechnology (ACWEB, Formerly AWMC), Gehrmann Building, The University of Queensland, St. Lucia, 4072, Brisbane, Australia
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Lee SY, Lee JS, Sim SJ. Enhancement of microalgal biomass productivity through mixotrophic culture process utilizing waste soy sauce and industrial flue gas. BIORESOURCE TECHNOLOGY 2023; 373:128719. [PMID: 36773814 DOI: 10.1016/j.biortech.2023.128719] [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: 01/04/2023] [Revised: 02/06/2023] [Accepted: 02/07/2023] [Indexed: 06/18/2023]
Abstract
Wastewater treatment plants are indispensable facilities, which emit a massive amount of greenhouse gases. To boost CO2 mitigation and wastewater treatment performance, mixotrophic microalgae cultivation using wastewater has recently been proposed. In this study, food industry wastewater (waste soy sauce) was applied to Chlorella sorokiniana UTEX 2714 cultivation. By using a medium with 20% (v/v) of 10-fold diluted soy sauce, the biomass and fatty acid methyl ester (FAME) productivity enhanced by 1.93 and 1.76 times, respectively. Biomass productivity increased up to 5.2 times when using medium with high soy sauce content under high-intensity light that inhibits cell growth in photoautotrophic environments. Furthermore, industrial flue gas treatment with wastewater was demonstrated by outdoor semi-continuous cultivation with 42% improved biomass production. Consequently, these results suggest that mixotrophic microalgal cultivation has great potential to address both climate change and water pollution while producing valuable products and can contribute to building a sustainable society.
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Affiliation(s)
- So Young Lee
- Department of Chemical and Biological Engineering, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Jeong Seop Lee
- Department of Chemical and Biological Engineering, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Sang Jun Sim
- Department of Chemical and Biological Engineering, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea.
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Abdulgader M, Yu QJ, Zinatizadeh AA, Williams P, Rahimi Z. Treatment capacity of a novel flexible fibre biofilm bioreactor treating high-strength milk processing wastewater. ENVIRONMENTAL TECHNOLOGY 2023; 44:1001-1017. [PMID: 34635010 DOI: 10.1080/09593330.2021.1992509] [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: 04/19/2021] [Accepted: 10/03/2021] [Indexed: 06/13/2023]
Abstract
This study was focused on the capacity investigation of a novel multistage flexible fibre biofilm reactor (MS-FFBR) to treat milk processing wastewater (MPW) with high organic loading (OLR). The MS-FFBR performance was evaluated at four intermediate stages separately, and also the final effluent quality of the overall system with an influent chemical oxygen demand (CODin) ranged from 1500 ± 20 to 6000 ± 50 mg/L and hydraulic retention times (HRTs) of 8, 12, and 16 h. By comparting the bioreactors into the four stages effectively enhanced the bioreactor's performance. The maximum TCOD removal efficiency was achieved at the first stage, which was about 89 ± 20, 82 ± 20, and 78 ± 20% at HRTs of 16, 12, 8 h, and low CODin of 1600 ± 20, 1590 ± 20, and 1673 ± 20 mg/L, respectively. However, the first stage had less contribution to TCOD removal at high CODin concentrations, reported to be about 42 ± 4%, 46 ± 4%, and 25 ± 4% at CODin of 5960 ± 40, 5830 ± 40, and 5870 ± 40 mg/L, respectively. Furthermore, the MS-FFBR was effective in removing total suspended solids (TSS) and turbidity. The bioreactor has reduced the effluent turbidity to 9.0 ± 0.2, 20.0 ± 0.6, and 16.1 ± 0.5 NTU at low CODin concentrations of 1600 ± 20, 1590 ± 20, and 1670 ± 20 mg/L and HRTs of 16, 12, and 8 h, respectively. The bioreactor revealed a high COD removal rate increased from 2.3 ± 0.1 to 12.2 ± 0.4 kg TCOD/m3d by increasing the OLR from 2.4 ± 0.1 to 17.6 ± 0.4 kg TCOD/m3d, confirming high reactor capacity for treatment of high-strength wastewater. Kinetic studies confirmed that the biomass yield was low at various HRTs ranging from 0.1 to 0.2 gVSS/gCOD.
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Affiliation(s)
- Mohamed Abdulgader
- School of Engineering and Built Environment, Griffith University, Brisbane, Australia
- Department of Environmental Science, Faculty of Engineering & Technology, Sebha University, Sabha, Libya
| | - Qiming Jimmy Yu
- School of Engineering and Built Environment, Griffith University, Brisbane, Australia
| | - Ali Akbar Zinatizadeh
- Department of Applied Chemistry, Faculty of Chemistry, Razi University, Kermanshah, Iran
- Environmental Research Center (ERC), Razi University, Kermanshah, Iran
- Department of Environmental Sciences, College of Agriculture and Environmental Sciences, University of South Africa, Florida, South Africa
| | - Philip Williams
- School of Engineering and Built Environment, Griffith University, Brisbane, Australia
| | - Zahra Rahimi
- Department of Applied Chemistry, Faculty of Chemistry, Razi University, Kermanshah, Iran
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Mao H, Fan W, Cao H, Chen X, Qiu M, Verweij H, Fan Y. Self-cleaning performance of in-situ ultrasound generated by quartz-based piezoelectric membrane. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.120031] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Asgharnejad H, Khorshidi Nazloo E, Madani Larijani M, Hajinajaf N, Rashidi H. Comprehensive review of water management and wastewater treatment in food processing industries in the framework of water-food-environment nexus. Compr Rev Food Sci Food Saf 2021; 20:4779-4815. [PMID: 34190421 DOI: 10.1111/1541-4337.12782] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 05/07/2021] [Accepted: 05/11/2021] [Indexed: 01/25/2023]
Abstract
Food processing is among the greatest water-consuming industries with a significant role in the implementation of sustainable development goals. Water-consuming industries such as food processing have become a threat to limited freshwater resources, and numerous attempts are being carried out in order to develop and apply novel approaches for water management in these industries. Studies have shown the positive impact of the new methods of process integration (e.g., water pinch, mathematical optimization, etc.) in maximizing water reuse and recycle. Applying these methods in food processing industries not only significantly supported water consumption minimization but also contributed to environmental protection by reducing wastewater generation. The methods can also increase the productivity of these industries and direct them to sustainable production. This interconnection led to a new subcategory in nexus studies known as water-food-environment nexus. The nexus assures sustainable food production with minimum freshwater consumption and minimizes the environmental destructions caused by untreated wastewater discharge. The aim of this study was to provide a thorough review of water-food-environment nexus application in food processing industries and explore the nexus from different aspects. The current study explored the process of food industries in different sectors regarding water consumption and wastewater generation, both qualitatively and quantitatively. The most recent wastewater treatment methods carried out in different food processing sectors were also reviewed. This review provided a comprehensive literature for choosing the optimum scenario of water and wastewater management in food processing industries.
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Affiliation(s)
- Hashem Asgharnejad
- School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran
| | - Ehsan Khorshidi Nazloo
- School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran
| | - Maryam Madani Larijani
- Department of Community Health and Epidemiology, College of Medicine, University of Saskatchewan, Saskatoon, Canada
| | - Nima Hajinajaf
- Chemical Engineering Program, School for Engineering of Matter, Transport, and Energy, Arizona State University, Tempe, Arizona, USA
| | - Hamidreza Rashidi
- School of Environment and Sustainability, University of Saskatchewan, Saskatoon, Canada
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7
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Process analysis and optimization of single stage flexible fibre biofilm reactor treating milk processing industrial wastewater using response surface methodology (RSM). Chem Eng Res Des 2019. [DOI: 10.1016/j.cherd.2019.07.011] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Mohammadi P, Karami N, Zinatizadeh AA, Falahi F, Aghamohammadi N, Almasi A. Using high frequency and low-intensity ultrasound to enhance activated sludge characteristics. ULTRASONICS SONOCHEMISTRY 2019; 54:274-280. [PMID: 30712854 DOI: 10.1016/j.ultsonch.2019.01.030] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2018] [Revised: 01/21/2019] [Accepted: 01/22/2019] [Indexed: 06/09/2023]
Abstract
In this study, high-frequency ultrasound wave (1.8 MHz) at low intensity was applied to improve activated sludge settleability at high MLSS concentration. The effect of irradiation intensity, sonication mode, MLSS concentration and sample volume on the physical characteristics of sludge in a pilot scale settling column were investigated for optimizing the conditions. The obtained results showed that high-frequency ultrasound decreased the height of sludge (44%) and effluent turbidity (82.2%) and increased sludge settling velocity about 3 times at high biomass concentration. Irradiation intensity of 0.4 w/cm2 and sonication mode with interval times of 10 s showed the best results on the performance of the system at MLSS concentration of 8000 mg/L with a sample volume of 3 L.
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Affiliation(s)
- Parviz Mohammadi
- Research Center for Environmental Determinants of Health, Department of Environmental Health Engineering, School of Public Health, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Nasim Karami
- Research Center for Environmental Determinants of Health, Department of Environmental Health Engineering, School of Public Health, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Ali Akbar Zinatizadeh
- Environmental Research Center (ERC), Department of Applied Chemistry, Faculty of Chemistry, Razi University, Kermanshah, Iran
| | - Farzaneh Falahi
- Research Center for Environmental Determinants of Health, Department of Environmental Health Engineering, School of Public Health, Kermanshah University of Medical Sciences, Kermanshah, Iran.
| | - Nasrin Aghamohammadi
- Centre for Occupational and Environmental Health, Department of Social and Preventive Medicine, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia.
| | - Ali Almasi
- Research Center for Environmental Determinants of Health, Department of Environmental Health Engineering, School of Public Health, Kermanshah University of Medical Sciences, Kermanshah, Iran
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9
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Wu X, Liu J, Zhu JJ. Sono-Fenton hybrid process on the inactivation of Microcystis aeruginosa: Extracellular and intracellular oxidation. ULTRASONICS SONOCHEMISTRY 2019; 53:68-76. [PMID: 30600211 DOI: 10.1016/j.ultsonch.2018.12.034] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2018] [Revised: 12/18/2018] [Accepted: 12/23/2018] [Indexed: 05/26/2023]
Abstract
For the first time, the inactivation of Microcystis aeruginosa using sono-Fenton process at low frequency high intensity (20 kHz, 0.42 W/mL) and high frequency low intensity (800 kHz, 0.07 W/mL) was investigated, respectively. 20 kHz sono-Fenton treatment successfully reduced cyanobacterial cell number from 4.19 × 106 cells/mL to 0.45 × 106 cells/mL within 5 min treatment. Alternatively, efficient performance of 800 kHz sono-Fenton process was observed to decrease Microcystis cell number to 2.33 × 106 cells/mL after 5 min inactivation, with lower energy cost. It was found that powerful 20 kHz sonication induced pore formation on the cell wall, leading to extracellular damage, while 800 kHz irradiation with low intensity triggered intracellular uptake of chemicals, suggesting endocytosis effects. Furthermore, sono-Fenton Processes were found to be affected by the concentrations of Fenton's reagent, and pre-sonication time. Although solo Fenton treatment released microcystins in water, the degradation of microcystin-LR were achieved using 20 and 800 kHz sono-Fenton processes, respectively. The results of this work showed that severe extracellular oxidation is the vital inactivation mechanism of 20 kHz sono-Fenton process, while the internal oxidation caused by intracellularly delivered Fenton reagents is suggested to be the main cause of 800 kHz sono-Fenton inactivation, leading to much lower energy cost. This work provides alternative methods to control harmful cyanobacteria in water towards effective treatment.
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Affiliation(s)
- Xiaoge Wu
- Environment Science and Engineering College, Yangzhou University, Yangzhou, Jiangsu 225009, China; State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210023, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing 210095, China
| | - Junli Liu
- Environment Science and Engineering College, Yangzhou University, Yangzhou, Jiangsu 225009, China
| | - Jun-Jie Zhu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210023, China.
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Abyar H, Younesi H, Bahramifar N, Zinatizadeh AA. Biological CNP removal from meat-processing wastewater in an innovative high rate up-flow A 2O bioreactor. CHEMOSPHERE 2018; 213:197-204. [PMID: 30223124 DOI: 10.1016/j.chemosphere.2018.09.047] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Revised: 08/29/2018] [Accepted: 09/07/2018] [Indexed: 06/08/2023]
Abstract
A high rate up-flow anaerobic, anoxic and oxic (A2O) bioreactor was designed and operated for meat-processing wastewater (MPW) treatment as a single cost-effective system with the aim of simultaneous CNP removal. The influence of three essential factors, HRT, COD/TN ratio and aerated volume fraction on the reactor performance was assessed using response surface methodology (RSM). The required HRT to reach 98.5% COD removal was achieved at 7.5 h. Simultaneous CNP removal under denitrification rate of 199.4 mg/l.d gave high nitrate to nitrogen gas conversion of 74.6 mg/l. An HRT, COD/TN ratio and aerated volume fraction of 10 h, 100:20 and 60%, respectively, was a favored condition for an efficient nitrogen removal with effluent total Kjeldahl nitrogen (TKN) less than 70 mg/l. Under optimum condition, an HRT, COD/TN and aerated volume fraction of 8 h, 100:14 and 65%, respectively, resulted an effluent phosphorus of 43 mg/l, but 93.97 mg/l phosphorus was released in an anaerobic condition at 6 h. An effluent with a low turbidity of about 1.5 NTU and a sludge volume index (SVI) of 75.9 ml/g was achieved using at HRT of 12.5 h, COD/TN ratio of 100: 8 and aerated volume fraction of 50%. Under these conditions, the removal efficiencies for COD, TKN, nitrate-nitrogen (NO3--N), total nitrogen (TN) and phosphorus (PO43--P) were obtained to be 98.33, 92.06, 91.97, 90.48 and 83.48%, respectively. As a result, the application of the up-flow A2O bioreactor is a promising configuration to get hygienic water from wastewater.
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Affiliation(s)
- Hajar Abyar
- Department of Environmental Science, Faculty of Natural Resources, Tarbiat Modares University, Noor, Iran
| | - Habibollah Younesi
- Department of Environmental Science, Faculty of Natural Resources, Tarbiat Modares University, Noor, Iran.
| | - Nader Bahramifar
- Department of Environmental Science, Faculty of Natural Resources, Tarbiat Modares University, Noor, Iran
| | - Ali Akbar Zinatizadeh
- Environmental Research Center (ERC), Department of Applied Chemistry, Faculty of Chemistry, Razi University, Kermanshah, Iran
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Karami N, Mohammadi P, Zinatizadeh A, Falahi F, Aghamohammadi N. High rate treatment of hospital wastewater using activated sludge process induced by high-frequency ultrasound. ULTRASONICS SONOCHEMISTRY 2018; 46:89-98. [PMID: 29739516 DOI: 10.1016/j.ultsonch.2018.04.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 04/03/2018] [Accepted: 04/18/2018] [Indexed: 06/08/2023]
Abstract
The biomass concentration of conventional activated sludge (CAS) process due to low sludge sedimentation in clarifiers is limited to 3000 mg/L. In this study, high-frequency ultrasound wave (1.8 MHz) was applied to enhance the CAS process performance using high Mixed Liquor Suspended Solid (MLSS) concentration. The study conducted using a pilot scale CAS bioreactor (with and without ultrasound) and their performance for treating a hospital wastewater were compared. Experimental conditions were designed based on a Central Composite Design (CCD). The sets of data analyzed, modeled and optimized using Response Surface Methodology (RSM). The effect of MLSS concentration 3000-8000 mg/L and hydraulic retention time (HRT) 2-8 h are considered as operating variables to investigate on process responses. The obtained results showed that high-frequency ultrasound was significantly decreased the sludge volume index (SVI) 50% and effluent turbidity about 88.5% at high MLSS. Also, observed that COD removal of both systems was nearly similar, as the maximum COD removal for sonicated and non-sonicated systems were 92 and 92.5% respectively. However, this study demonstrates that the ultrasound irradiation has not had any negative effect on the microbial activity.
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Affiliation(s)
- Nasim Karami
- Research Center for Environmental Determinants of Health, Department of Environmental Health Engineering, School of Public Health, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Parviz Mohammadi
- Research Center for Environmental Determinants of Health, Department of Environmental Health Engineering, School of Public Health, Kermanshah University of Medical Sciences, Kermanshah, Iran.
| | - Aliakbar Zinatizadeh
- Environmental Research Center (ERC), Department of Applied Chemistry, Faculty of Chemistry, Razi University, Kermanshah, Iran
| | - Farzaneh Falahi
- Research Center for Environmental Determinants of Health, Department of Environmental Health Engineering, School of Public Health, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Nasrin Aghamohammadi
- Centre for Occupational and Environmental Health, Department of Social and Preventive Medicine, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia
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12
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Mirghorayshi M, Zinatizadeh AA, Van Loosdrecht M. Evaluating the process performance and potential of a high-rate single airlift bioreactor for simultaneous carbon and nitrogen removal through coupling different pathways from a nitrogen-rich wastewater. BIORESOURCE TECHNOLOGY 2018; 260:44-52. [PMID: 29614450 DOI: 10.1016/j.biortech.2018.03.048] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Revised: 03/07/2018] [Accepted: 03/09/2018] [Indexed: 06/08/2023]
Abstract
The feasibility of a continuous feed and intermittent discharge airlift bioreactor for simultaneous carbon and nitrogen removal from a low COD/N wastewater was evaluated. The effect of two independent variables, HRT (10-20 h) and NH4+/(NH4++NO3-) ratio (0.25-0.75), on the bioreactor performance was studied. The relatively high anaerobic to aerobic time ratio made an effective contribution to NH4+, NO3-, and TN removal. TN removal was enhanced with increase in HRT and decrease in NH4+/NH4++NO3- and at the optimum condition, 616 mg/L (88%) and 213 mg/L (76%) of sCOD and TN were removed, respectively. The results suggested that the nitrogen removal process was based on a combination of anaerobic ammonium oxidation (Anammox), simultaneous nitrification-denitrification (SND), and presumable dissimilatory nitrate reduction to ammonium (DNRA) mechanisms.
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Affiliation(s)
- Mahsa Mirghorayshi
- Environment Research Center (ERC), Department of Applied Chemistry, Faculty of Chemistry, Razi University, Kermanshah, Iran
| | - Ali Akbar Zinatizadeh
- Environment Research Center (ERC), Department of Applied Chemistry, Faculty of Chemistry, Razi University, Kermanshah, Iran.
| | - Mark Van Loosdrecht
- Department of Biotechnology, Delft University of Technology, Julianalaan 67, 2628 BC Delft, The Netherlands
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Borea L, Naddeo V, Shalaby MS, Zarra T, Belgiorno V, Abdalla H, Shaban AM. Wastewater treatment by membrane ultrafiltration enhanced with ultrasound: Effect of membrane flux and ultrasonic frequency. ULTRASONICS 2018; 83:42-47. [PMID: 28662777 DOI: 10.1016/j.ultras.2017.06.013] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Revised: 06/13/2017] [Accepted: 06/19/2017] [Indexed: 06/07/2023]
Abstract
Membrane ultrafiltration is increasingly applied for wastewater treatment and reuse, even though membrane fouling still represents one of the main drawbacks of this technology. In the last years, innovative strategies for membrane fouling control have been developed, such as the combination of membrane processes with ultrasound (US). In present work, the application of membrane ultrafiltration and its combination with US were studied, evaluating the influence on the performance of the treatment and membrane fouling formation of two membrane fluxes, 75 and 150L/m2h, along with two US frequencies, 35 and 150kHz. The results observed showed that the combination of membrane ultrafiltration with US, respect to the filtration process alone, reduced membrane fouling rates to a greater extent at the higher membrane flux and lower US frequency applied, reaching a reduction of 57.33% at 150L/m2h and 35kHz. Furthermore, higher organic matter and turbidity removals were observed at higher frequency (130kHz). The results obtained highlights the applicability of this combined process for the upgrading of membrane ultrafiltration and as an alternative option to conventional tertiary wastewater treatments.
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Affiliation(s)
- Laura Borea
- Sanitary Environmental Engineering Division (SEED), Department of Civil Engineering, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
| | - Vincenzo Naddeo
- Sanitary Environmental Engineering Division (SEED), Department of Civil Engineering, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy.
| | - Marwa S Shalaby
- Chemical Engineering and Pilot Plant Department, Engineering Research Division, National Research Centre, 33 El Bohouth Street (Former El Tahrir Street), P.O. Box 12622, Dokki, Giza, Egypt
| | - Tiziano Zarra
- Sanitary Environmental Engineering Division (SEED), Department of Civil Engineering, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
| | - Vincenzo Belgiorno
- Sanitary Environmental Engineering Division (SEED), Department of Civil Engineering, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
| | - Heba Abdalla
- Chemical Engineering and Pilot Plant Department, Engineering Research Division, National Research Centre, 33 El Bohouth Street (Former El Tahrir Street), P.O. Box 12622, Dokki, Giza, Egypt
| | - Ahmed M Shaban
- Water Pollution Research Department, National Research Centre, 33 El Bohouth Street (Former El Tahrir Street), P.O. Box 12622, Dokki, Giza, Egypt
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14
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Erkan HS, Gunalp G, Engin GO. Application of submerged membrane bioreactor technology for the treatment of high strength dairy wastewater. BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING 2018. [DOI: 10.1590/0104-6632.20180351s20160599] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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15
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Abyar H, Younesi H, Bahramifar N, Zinatizadeh AA, Amini M. Kinetic evaluation and process analysis of COD and nitrogen removal in UAASB bioreactor. J Taiwan Inst Chem Eng 2017. [DOI: 10.1016/j.jtice.2017.06.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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16
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Asadi A, Zinatizadeh AA, van Loosdrecht M. Effects of operational models (batch, continuous and CFID modes) on the performance of a single A2O airlift bioreactor for treatment of milk processing wastewater. Chem Eng Res Des 2017. [DOI: 10.1016/j.cherd.2017.08.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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17
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Asadi A, Zinatizadeh AA, Van Loosdrecht M, Younesi H. Nitrogen removal by ANAMMOX and simultaneous nitrification–denitrification (SND) processes in a novel single airlift bioreactor. RSC Adv 2016. [DOI: 10.1039/c6ra11174b] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The aim of this research was to assess anaerobic ammonium oxidation and simultaneous nitrification–denitrification processes in a novel continuous feed and intermittent discharge airlift bioreactor which provides anaerobic, anoxic and aerobic zones by physical separation.
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Affiliation(s)
- A. Asadi
- Environmental Research Center
- Department of Applied Chemistry
- Faculty of Chemistry
- Razi University
- Kermanshah
| | - A. A. Zinatizadeh
- Environmental Research Center
- Department of Applied Chemistry
- Faculty of Chemistry
- Razi University
- Kermanshah
| | - M. Van Loosdrecht
- Department of Biotechnology
- Delft University of Technology
- 2628 BC Delft
- The Netherlands
| | - H. Younesi
- Department of Environmental Science
- Faculty of Natural Resources and Marine Science
- Tarbiat Modares University
- Noor
- Iran
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18
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Rezaee S, Zinatizadeh A, Asadi A. Comparative study on effect of mechanical mixing and ultrasound on the performance of a single up-flow anaerobic/aerobic/anoxic bioreactor removing CNP from milk processing wastewater. J Taiwan Inst Chem Eng 2016. [DOI: 10.1016/j.jtice.2015.06.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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