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Elsayad RM, Sharshir SW, Khalil A, Basha AM. Recent advancements in wastewater treatment via anaerobic fermentation process: A systematic review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 366:121724. [PMID: 38971071 DOI: 10.1016/j.jenvman.2024.121724] [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: 04/11/2024] [Revised: 06/20/2024] [Accepted: 07/02/2024] [Indexed: 07/08/2024]
Abstract
This manuscript delves into the realm of wastewater treatment, with a particular emphasis on anaerobic fermentation processes, especially dark, photo, and dark-photo fermentation processes, which have not been covered and overviewed previously in the literature regarding the treatment of wastewater. Moreover, the study conducts a bibliometric analysis for the first time to elucidate the research landscape of anaerobic fermentation utilization in wastewater purification. Furthermore, microorganisms, ranging from microalgae to bacteria and fungi, emphasizing the integration of these agents for enhanced efficiency, are all discussed and compared. Various bioreactors, such as dark and photo fermentation bioreactors, including tubular photo bioreactors, are scrutinized for their design and operational intricacies. The results illustrated that using clostridium pasteurianum CH4 and Rhodopseudomonas palustris WP3-5 in a combined dark-photo fermentation process can treat wastewater to a pH of nearly 7 with over 90% COD removal. Also, integrating Chlorella sp and Activated sludge can potentially treat synthetic wastewater to COD, P, and N percentage removal rates of 99%,86%, and 79%, respectively. Finally, the paper extends to discuss the limitations and future prospects of dark-photo fermentation processes, offering insights into the road ahead for researchers and scientists.
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Affiliation(s)
- Rahma M Elsayad
- Civil Engineering Department, Faculty of Engineering, Kafrelsheikh University, Kafrelsheikh, 33516, Egypt; Higher Institute of Engineering and Technology, Kafrelsheikh, KFS-HIET, Kafrelsheikh, 33516, Egypt
| | - Swellam W Sharshir
- Mechanical Engineering Department, Faculty of Engineering, Kafrelsheikh University, Kafrelsheikh, 33516, Egypt.
| | - Ahmed Khalil
- Civil Engineering Department, Faculty of Engineering, Kafrelsheikh University, Kafrelsheikh, 33516, Egypt.
| | - Ali M Basha
- Civil Engineering Department, Faculty of Engineering, Kafrelsheikh University, Kafrelsheikh, 33516, Egypt.
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2
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Nordio R, Rodríguez-Miranda E, Casagli F, Sánchez-Zurano A, Guzmán JL, Acién G. ABACO-2: a comprehensive model for microalgae-bacteria consortia validated outdoor at pilot-scale. WATER RESEARCH 2024; 248:120837. [PMID: 37984038 DOI: 10.1016/j.watres.2023.120837] [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: 09/05/2023] [Revised: 10/30/2023] [Accepted: 11/03/2023] [Indexed: 11/22/2023]
Abstract
Modelling microalgae-bacteria in wastewater treatment systems has gained significant attention in the last few years. In this study, we present an enhanced version of the ABACO model, named ABACO-2, which demonstrates improved accuracy through validation in outdoor pilot-scale systems. ABACO-2 enables the comprehensive characterization of microalgae-bacteria consortia dynamics, allowing to predict the biomass concentration (microalgae, heterotrophic bacteria, and nitrifying bacteria) and nutrient evolution. The updated version of the model incorporates new equations for nutrient coefficient yields, oxygen mass balance, and microorganism cellular decay, while significantly reducing the number of calibrated parameters, simplifying the parameter identification. Calibration and validation were performed using data from a 80 m2 raceway reactor operated in a semicontinuous mode over an extensive period (May to November, total of 206 days) at a fixed dilution rate of 0.2 day-1 (corresponding to 5 days of hydraulic retention time), where untreated urban wastewater was used as culture medium. ABACO-2 exhibited robustness, accurately forecasting biomass production, population dynamics, nutrient recovery, and prevailing culture conditions across a wide range of environmental and water composition conditions. Mathematical models are essential instruments for the industrial development and optimization of microalgae-related wastewater treatment processes, thereby contributing to the sustainability of the wastewater treatment industry.
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Affiliation(s)
- Rebecca Nordio
- Department of Chemical Engineering, Universidad de Almería, E04120 Almería, Spain; CIESOL Solar Energy Research Centre, Joint Centre University of Almería-CIEMAT, 04120 Almería, Spain.
| | - Enrique Rodríguez-Miranda
- CIESOL Solar Energy Research Centre, Joint Centre University of Almería-CIEMAT, 04120 Almería, Spain; Department of Informatics, Universidad de Almería, E04120 Almería, Spain
| | - Francesca Casagli
- Biocore, INRIA centre d'Université Côte d'Azur, Sophia-Antipolis F-06902, France
| | - Ana Sánchez-Zurano
- Department of Chemical Engineering, Universidad de Almería, E04120 Almería, Spain; CIESOL Solar Energy Research Centre, Joint Centre University of Almería-CIEMAT, 04120 Almería, Spain
| | - José Luis Guzmán
- CIESOL Solar Energy Research Centre, Joint Centre University of Almería-CIEMAT, 04120 Almería, Spain; Department of Informatics, Universidad de Almería, E04120 Almería, Spain
| | - Gabriel Acién
- Department of Chemical Engineering, Universidad de Almería, E04120 Almería, Spain; CIESOL Solar Energy Research Centre, Joint Centre University of Almería-CIEMAT, 04120 Almería, Spain
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3
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Liu J, Qin H, Meng X, Fan X, Zhu N, Sun S, Zhao Y, Jiang Z. Nutrient removal from biogas slurry and biogas upgrading by microalgae-fungi-bacteria co-cultivation under different carbon nanotubes concentration. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:36023-36032. [PMID: 36542281 DOI: 10.1007/s11356-022-24822-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Accepted: 12/13/2022] [Indexed: 06/17/2023]
Abstract
In this study, Chlorella vulgaris, Ganoderma lucidum, and endophytic bacteria were co-cultivated with the stimulation of strigolactone analogs GR24 to prepare pellets. During the purification of biogas slurry and biogas, multi-walled carbon nanotubes (MWCNTs) were introduced to enhance the removal efficiencies of nutrients and CO2. The results showed that both GR24 and MWCNTs affected the purification of biogas slurry and biogas. The maximum chemical oxygen demand, total nitrogen, total phosphorus, and CO2 removal efficiencies of the Chlorella vulgaris-Ganoderma lucidum-endophytic bacterial symbionts were 82.57 ± 7.96% (P < 0.05), 82.14 ± 7.87% (P < 0.05), 84.27 ± 7.96% (P < 0.05), and 63.93 ± 6.22% (P < 0.05), respectively, with the induction of 10-9 M GR24 and 1 mg L-1 MWCNTs. Moreover, the growth and photosynthetic performance of the symbionts were consistent with the removal effects. The Chlorella vulgaris-Ganoderma lucidum-endophytic bacterial symbionts obtained high growth rates and enzyme activity with the maximum growth rate of 0.365 ± 0.03 d-1, mean daily productivity of 0.182 ± 0.016 g L-1 d-1, and carbonic anhydrase activity of 31.07 ± 2.75 units, respectively. These results indicated that an appropriate concentration of GR24 and MWCNTs could promote the growth of symbionts, reinforce the purification effects of biogas slurry and biogas, and provide a new idea for the simultaneous purification of wastewater and biogas.
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Affiliation(s)
- Jinsong Liu
- College of Advanced Materials Engineering, Jiaxing Nanhu University, Jiaxing, 314001, People's Republic of China
| | - Haiyan Qin
- The 11th Geological Section of Zhejiang Province, 325006, Wenzhou, People's Republic of China
| | - Xiangzhou Meng
- College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, People's Republic of China
- Jiaxing-Tongji Environmental Research Institute, 1994 Linggongtang Road, Jiaxing, 314051, Zhejiang Province, People's Republic of China
| | - Xingjun Fan
- College of Resource and Environment, Anhui Science and Technology University, Fengyang, 233100, People's Republic of China
| | - Ningzheng Zhu
- College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, People's Republic of China
- Jiaxing-Tongji Environmental Research Institute, 1994 Linggongtang Road, Jiaxing, 314051, Zhejiang Province, People's Republic of China
| | - Shiqing Sun
- College of Advanced Materials Engineering, Jiaxing Nanhu University, Jiaxing, 314001, People's Republic of China
| | - Yongjun Zhao
- College of Biological, Chemical Science and Engineering, Jiaxing University, Jiaxing, 314001, People's Republic of China.
| | - Zhoujia Jiang
- College of Advanced Materials Engineering, Jiaxing Nanhu University, Jiaxing, 314001, People's Republic of China
- College of Biological, Chemical Science and Engineering, Jiaxing University, Jiaxing, 314001, People's Republic of China
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4
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Capson-Tojo G, Batstone DJ, Hülsen T. Expanding mechanistic models to represent purple phototrophic bacteria enriched cultures growing outdoors. WATER RESEARCH 2023; 229:119401. [PMID: 36450178 DOI: 10.1016/j.watres.2022.119401] [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: 06/14/2022] [Revised: 10/17/2022] [Accepted: 11/20/2022] [Indexed: 06/17/2023]
Abstract
The economic feasibility of purple phototrophic bacteria (PPB) for resource recovery relies on using enriched-mixed cultures and sunlight. This work presents an extended Photo-Anaerobic Model (ePAnM), considering: (i) the diverse metabolic capabilities of PPB, (ii) microbial clades interacting with PPB, and (iii) varying environmental conditions. Key kinetic and stoichiometric parameters were either determined experimentally (with dedicated tests), calculated, or gathered from literature. The model was calibrated and validated using different datasets from an outdoors demonstration-scale reactor, as well as results from aerobic and anaerobic batch tests. The ePAnM was able to predict the concentrations of key compounds/components (e.g., COD, volatile fatty acids, and nutrients), as well as microbial communities (with anaerobic systems dominated by fermenters and PPB). The results underlined the importance of considering other microbial clades and varying environmental conditions. The model predicted a minimum hydraulic retention time of 0.5 d-1. A maximum width of 10 cm in flat plate reactors should not be exceeded. Simulations showed the potential of a combined day-anaerobic/night-aerobic operational strategy to allow efficient continuous operation.
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Affiliation(s)
- Gabriel Capson-Tojo
- Australian Centre for Water and Environmental Biotechnology, The University of Queensland, Brisbane, QLD 4072, Australia; Department of Chemical Engineering, CRETUS, Universidade de Santiago de Compostela, Santiago de Compostela, Galicia 15782, Spain; INRAE, University Montpellier, LBE, 102 Avenue des Etangs, Narbonne 11100, France.
| | - Damien J Batstone
- Australian Centre for Water and Environmental Biotechnology, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Tim Hülsen
- Australian Centre for Water and Environmental Biotechnology, The University of Queensland, Brisbane, QLD 4072, Australia
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5
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Shen XF, Xu YP, Tong XQ, Huang Q, Zhang S, Gong J, Chu FF, Zeng RJ. The mechanism of carbon source utilization by microalgae when co-cultivated with photosynthetic bacteria. BIORESOURCE TECHNOLOGY 2022; 365:128152. [PMID: 36265788 DOI: 10.1016/j.biortech.2022.128152] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 10/11/2022] [Accepted: 10/12/2022] [Indexed: 06/16/2023]
Abstract
Microalgae-photosynthetic bacteria (PSB) co-culture, which is promising for wastewater treatment and lipid production, is lacking of study. In this work, the combinations of 3 microalgae and 3 PSB strains were firstly screened and then different inoculation ratios of the co-cultures were investigated. It was found the best promotion was Chlorella pyrenoidosa/Rhodobacter capsulatus co-culture (1:1), where the biomass productivity, acetate assimilation rate and lipid productivity were 1.64, 1.61 and 2.79 times than that of the sum of pure microalgae and PSB cultures, respectively. Meanwhile, the inoculation ratio significantly affected the growth rate and lipid productivity of co-culture systems. iTRAQ analysis showed that PSB played a positive effect on acetate assimilation, TCA cycle and glyoxylate cycle of microalgae, but decreased the carbon dioxide utilization and photosynthesis, indicating PSB promoted the microalgae metabolism of organic carbon utilization and weakened inorganic carbon utilization. These findings provide in-depth understanding of carbon utilization in microalgae-PSB co-culture.
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Affiliation(s)
- Xiao-Fei Shen
- School of Ecology and Environment, Anhui Normal University, Anhui 241000, PR China
| | - Ya-Ping Xu
- School of Ecology and Environment, Anhui Normal University, Anhui 241000, PR China
| | - Xiao-Qin Tong
- School of Ecology and Environment, Anhui Normal University, Anhui 241000, PR China
| | - Qi Huang
- School of Ecology and Environment, Anhui Normal University, Anhui 241000, PR China
| | - Shuai Zhang
- School of Ecology and Environment, Anhui Normal University, Anhui 241000, PR China
| | - Jing Gong
- School of Ecology and Environment, Anhui Normal University, Anhui 241000, PR China
| | - Fei-Fei Chu
- College of Standardization, China Jiliang University, Zhejiang 310018, PR China
| | - Raymond Jianxiong Zeng
- College of Resources and Environment, Fujian Agriculture and Forestry University, Fujian 350002, PR China.
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Evaluation of Microalgal Bacterial Dynamics in Pig-Farming Biogas Digestate under Impacts of Light Intensity and Nutrient Using Physicochemical Parameters. WATER 2022. [DOI: 10.3390/w14142275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Abstract
Determination of the dynamics between microalgae and bacteria in pig farming biogas digestate is vital for a consistent and reliable application towards sustainable wastewater treatment and biofuel production. This study assesses the reliability of using physicochemical parameters as indicators for the rapid evaluation of microalgal bacterial dynamics in real digestate under impacts of light, nutrient loads, and N:P ratios. The relationship between variation profiles of nutrients, biomass and physicochemical properties in each experiment was analyzed. High light and high nutrient load enhanced biomass growth and nutrient removal rate. Ammonium addition (high N:P ratio) elevated NH3 level which inhibited the growth of microalgae, subsequently reducing the biomass growth and nutrient removal. Low N:P ratio triggered the accumulation of phosphorus and the growth of chlorophyll-a but exerted little influence on treatment. Variation profiles of dissolved oxygen, nutrient and biomass were highly consistent in every experiment allowing us to identify the shift from microalgal to bacterial predomination under unfavorable conditions including low light intensity and high N:P ratio. Strong linear correlation was also found between total nitrogen removal and electrical conductivity (R2 = 0.9754). The results show the great potential of rapid evaluation of microalgal bacterial dynamics for large scale system optimization and modelling.
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7
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Oruganti RK, Katam K, Show PL, Gadhamshetty V, Upadhyayula VKK, Bhattacharyya D. A comprehensive review on the use of algal-bacterial systems for wastewater treatment with emphasis on nutrient and micropollutant removal. Bioengineered 2022; 13:10412-10453. [PMID: 35441582 PMCID: PMC9161886 DOI: 10.1080/21655979.2022.2056823] [Citation(s) in RCA: 33] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 03/16/2022] [Accepted: 03/17/2022] [Indexed: 11/08/2022] Open
Abstract
The scarcity of water resources and environmental pollution have highlighted the need for sustainable wastewater treatment. Existing conventional treatment systems are energy-intensive and not always able to meet stringent disposal standards. Recently, algal-bacterial systems have emerged as environmentally friendly sustainable processes for wastewater treatment and resource recovery. The algal-bacterial systems work on the principle of the symbiotic relationship between algae and bacteria. This paper comprehensively discusses the most recent studies on algal-bacterial systems for wastewater treatment, factors affecting the treatment, and aspects of resource recovery from the biomass. The algal-bacterial interaction includes cell-to-cell communication, substrate exchange, and horizontal gene transfer. The quorum sensing (QS) molecules and their effects on algal-bacterial interactions are briefly discussed. The effect of the factors such as pH, temperature, C/N/P ratio, light intensity, and external aeration on the algal-bacterial systems have been discussed. An overview of the modeling aspects of algal-bacterial systems has been provided. The algal-bacterial systems have the potential for removing micropollutants because of the diverse possible interactions between algae-bacteria. The removal mechanisms of micropollutants - sorption, biodegradation, and photodegradation, have been reviewed. The harvesting methods and resource recovery aspects have been presented. The major challenges associated with algal-bacterial systems for real scale implementation and future perspectives have been discussed. Integrating wastewater treatment with the algal biorefinery concept reduces the overall waste component in a wastewater treatment system by converting the biomass into a useful product, resulting in a sustainable system that contributes to the circular bioeconomy.
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Affiliation(s)
- Raj Kumar Oruganti
- Department of Civil Engineering, Indian Institute of Technology Hyderabad, Kandi, Sangareddy, India
| | - Keerthi Katam
- Department of Civil Engineering, École Centrale School of Engineering, Mahindra University, India
| | - Pau Loke Show
- Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham, Malaysia
| | - Venkataramana Gadhamshetty
- Civil and Environmental Engineering, South Dakota School of Mines and Technology, Rapid, South Dakota, USA
| | | | - Debraj Bhattacharyya
- Department of Civil Engineering, Indian Institute of Technology Hyderabad, Kandi, Sangareddy, India
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8
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Uncertainty and sensitivity analysis of algal-bacterial model under different ranges of parameter variation. Biochem Eng J 2022. [DOI: 10.1016/j.bej.2022.108334] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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9
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OUP accepted manuscript. FEMS Microbiol Rev 2022; 46:6585976. [DOI: 10.1093/femsre/fuac020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 05/05/2022] [Accepted: 05/06/2022] [Indexed: 11/13/2022] Open
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10
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Toward the Enhancement of Microalgal Metabolite Production through Microalgae-Bacteria Consortia. BIOLOGY 2021; 10:biology10040282. [PMID: 33915681 PMCID: PMC8065533 DOI: 10.3390/biology10040282] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Revised: 03/19/2021] [Accepted: 03/25/2021] [Indexed: 12/13/2022]
Abstract
Engineered mutualistic consortia of microalgae and bacteria may be a means of assembling a novel combination of metabolic capabilities with potential biotechnological advantages. Microalgae are promising organisms for the sustainable production of metabolites of commercial interest, such as lipids, carbohydrates, pigments, and proteins. Several studies reveal that microalgae growth and cellular storage of these metabolites can be enhanced significantly by co-cultivation with growth-promoting bacteria. This review summarizes the state of the art of microalgae-bacteria consortia for the production of microalgal metabolites. We discuss the current knowledge on microalgae-bacteria mutualism and the mechanisms of bacteria to enhance microalgae metabolism. Furthermore, the potential routes for a microalgae-bacteria biorefinery are outlined in an attempt to overcome the economic failures and negative energy balances of the existing production processes.
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Sánchez Zurano A, Gómez Serrano C, Acién-Fernández FG, Fernández-Sevilla JM, Molina-Grima E. Modeling of photosynthesis and respiration rate for microalgae-bacteria consortia. Biotechnol Bioeng 2020; 118:952-962. [PMID: 33179264 DOI: 10.1002/bit.27625] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2020] [Revised: 10/16/2020] [Accepted: 11/05/2020] [Indexed: 02/06/2023]
Abstract
In this article, the influence of culture conditions (irradiance, temperature, pH, and dissolved oxygen) on the photosynthesis and the respiration rates of microalgae-bacteria consortia in wastewater treatment was analyzed. Specifically, some short photo-respirometric experiments, simulating outdoor raceway reactors, were performed to evaluate the response of microalgae, heterotrophic bacteria, and nitrifying bacteria to variations in environmental parameters. Results demonstrate that irradiance is the most dominant variable to determine microalgae photosynthesis rates. However, reduction in microalgae activity was not observed at higher irradiance, ruling out the existence of photoinhibition phenomena. Related to heterotrophic and nitrifying bacteria, their activities were strongly affected by the influence of temperature and pH. Moreover, the effect of dissolved oxygen concentrations on microalgae, and bacteria activities was studied, displaying a reduced photosynthetic rate at dissolved oxygen concentrations above 20 mg/L. Data have been used to develop an integrated model for each population (microalgae, heterotrophic bacteria, and nitrifying bacteria) based on considering the simultaneous influence of irradiance, temperature, pH, and dissolved oxygen. The models fit the experimental results in the range of culture conditions tested, and they were validated using data obtained by the simultaneous modifications of the variables. These individual models serve as a basis for developing a global biologic microalgae-bacteria model for wastewater treatment to improve the optimal design and management of microalgae-based processes, especially outdoors, where the cultures are subject to variable daily culture conditions.
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Affiliation(s)
- Ana Sánchez Zurano
- Department of Chemical Engineering, University of Almeria, Almería, Spain
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12
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Andreotti V, Solimeno A, Rossi S, Ficara E, Marazzi F, Mezzanotte V, García J. Bioremediation of aquaculture wastewater with the microalgae Tetraselmis suecica: Semi-continuous experiments, simulation and photo-respirometric tests. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 738:139859. [PMID: 32534276 DOI: 10.1016/j.scitotenv.2020.139859] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 05/02/2020] [Accepted: 05/29/2020] [Indexed: 06/11/2023]
Abstract
Tetraselmis suecica was cultivated in a semi-continuously operated tubular photobioreactor fed on aquaculture wastewater (AW) testing two hydraulic retention times (HRT): 10 and 7 days (RUN_1 and RUN_2, respectively). The integrated mechanistic model BIO_ALGAE was validated with experimental data in order to simulate the biomass production and nutrient uptake of T. suecica. Moreover, AW was used as substitute synthetic cultivation medium to test the production of lipids, proteins, and carbohydrates in the microalgal biomass. Preliminary photo-respirometric tests were carried out on the AW suspension containing microalgae and bacteria. Dissolved Inorganic Nitrogen (DIN) and Dissolved Inorganic Phosphorus (DIP) were analyzed for the two RUNs, and no significant difference was highlighted (p > 0.05). On the contrary, the productivity of the Total suspended solids (TSS) was significantly higher (p < 0.05) for RUN_1 (900 mg TSS/L) than for RUN_2 (550 mg TSS/L). The analysis of the biochemical composition of biomass has demonstrated a higher content of proteins than of lipids and carbohydrates for the two RUNs. BIO_ALGAE model was validated by comparing simulated results to experimental data. The model was able to reproduce the pattern of these experimental data quite well, for both nutrient uptake and biomass production. The simulated curve follows the same pattern as the experimental data for both RUNs. The wavelike trend indicates the good accuracy of the simulated curves to reproduce the microalgae growth and nutrient uptake that occurring during daytime and at night. With this study, BIO_ALGAE Model was demonstrated to be useful to simulate bioremediation and microalgae production in aquaculture wastewater in a semi-continuous system with different environmental factors. The photo-respirometric outputs were compared with the process rates affecting dissolved oxygen dynamics computed by the mathematical model.
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Affiliation(s)
- Valeria Andreotti
- GEMMA-Group of Environmental Engineering and Microbiology, Department of Civil and Environmental Engineering, Universitat Politècnica de Catalunya BarcelonaTech, c/Jordi Girona, 1-3, 08034 Barcelona, Spain.
| | - Alessandro Solimeno
- Department of Biotechnology, Technological Institute of the Canary Islands (ITC), Playa de Pozo Izquierdo s/n, 35119, Pozo Izquierdo, Las Palmas, Spain
| | - Simone Rossi
- Politecnico di Milano, Department of Civil and Environmental Engineering (DICA), Via Golgi, 39, 20133 Milano, Italy
| | - Elena Ficara
- Politecnico di Milano, Department of Civil and Environmental Engineering (DICA), Via Golgi, 39, 20133 Milano, Italy
| | - Francesca Marazzi
- Department of Earth and Environmental Sciences (DISAT), University of Milano-Bicocca, Piazza della Scienza 1, 20126 Milano, Italy
| | - Valeria Mezzanotte
- Department of Earth and Environmental Sciences (DISAT), University of Milano-Bicocca, Piazza della Scienza 1, 20126 Milano, Italy
| | - Joan García
- GEMMA-Group of Environmental Engineering and Microbiology, Department of Civil and Environmental Engineering, Universitat Politècnica de Catalunya BarcelonaTech, c/Jordi Girona, 1-3, 08034 Barcelona, Spain
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A coupled RTD and mixed-order kinetic model to predict high rate algal pond wastewater treatment under different operational conditions: Performance assessment and sizing application. Biochem Eng J 2020. [DOI: 10.1016/j.bej.2020.107709] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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14
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Jiménez-Bambague EM, Madera-Parra CA, Ortiz-Escobar AC, Morales-Acosta PA, Peña-Salamanca EJ, Machuca-Martínez F. High-rate algal pond for removal of pharmaceutical compounds from urban domestic wastewater under tropical conditions. Case study: Santiago de Cali, Colombia. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2020; 82:1031-1043. [PMID: 33055394 DOI: 10.2166/wst.2020.362] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
This study evaluated the capacity of a pilot-scale high-rate algal pond (HRAP) to remove pharmaceutical compounds (PCs) from domestic wastewater in the city of Santiago de Cali, Colombia. The compounds analyzed included antiepileptics, hypolipidemic drugs, tranquilizers and analgesics, and anti-inflammatory drugs. The HRAP operated under a continuous water flow of 0.2 m3d-1 and a 3-day hydraulic retention time (HRT). Removal efficiencies were high (>70%) for fenofibric acid, ibuprofen, and paracetamol; medium (30-70%) for gabapentin, lamotrigine, fenofibrate, gemfibrozil, diclofenac, ketoprofen, naproxen, and pentoxifylline; and low (<30%) for carbamazepine and its metabolite 10,11-Dihidro-10,11-dihidroxicarbamazepine (CBZ-Diol). The findings herein are similar to other studies, but were obtained with a shorter HRT. These results show that tropical environmental conditions favor photodegradation and contribute to the development of microalgae and the biodegradation process. Twenty microalgae species were identified, with the phylum Chlorophyta as the most abundant, particularly due to its natural introduction. The removal of the PCs also reflected a percentage reduction (>50%) in the ecological hazard posed by most of the compounds, although it is important to note that the hazard from gemfibrozil and ibuprofen remained high even after treatment, indicating the need for complementary treatment.
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Affiliation(s)
| | - Carlos A Madera-Parra
- Escuela EIDENAR-Facultad de Ingeniería, Universidad del Valle, Cali, Colombia E-mail:
| | - Aura C Ortiz-Escobar
- Escuela EIDENAR-Facultad de Ingeniería, Universidad del Valle, Cali, Colombia E-mail:
| | - Paola A Morales-Acosta
- Escuela de Ciencias Básicas-Facultad de Ciencias Naturales y Exactas, Universidad del Valle, Cali, Colombia
| | - Enrique J Peña-Salamanca
- Escuela de Ciencias Básicas-Facultad de Ciencias Naturales y Exactas, Universidad del Valle, Cali, Colombia
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15
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Synthetic microbial communities of heterotrophs and phototrophs facilitate sustainable growth. Nat Commun 2020; 11:3803. [PMID: 32732991 PMCID: PMC7393147 DOI: 10.1038/s41467-020-17612-8] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Accepted: 07/02/2020] [Indexed: 01/23/2023] Open
Abstract
Microbial communities comprised of phototrophs and heterotrophs hold great promise for sustainable biotechnology. Successful application of these communities relies on the selection of appropriate partners. Here we construct four community metabolic models to guide strain selection, pairing phototrophic, sucrose-secreting Synechococcus elongatus with heterotrophic Escherichia coli K-12, Escherichia coli W, Yarrowia lipolytica, or Bacillus subtilis. Model simulations reveae metabolic exchanges that sustain the heterotrophs in minimal media devoid of any organic carbon source, pointing to S. elongatus-E. coli K-12 as the most active community. Experimental validation of flux predictions for this pair confirms metabolic interactions and potential production capabilities. Synthetic communities bypass member-specific metabolic bottlenecks (e.g. histidine- and transport-related reactions) and compensate for lethal genetic traits, achieving up to 27% recovery from lethal knockouts. The study provides a robust modelling framework for the rational design of synthetic communities with optimized growth sustainability using phototrophic partners.
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16
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Development of light-shielding hydrogel for nitrifying bacteria to prevent photoinhibition under strong light irradiation. Process Biochem 2020. [DOI: 10.1016/j.procbio.2020.04.037] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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17
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Robles Á, Capson-Tojo G, Gales A, Viruela A, Sialve B, Seco A, Steyer JP, Ferrer J. Performance of a membrane-coupled high-rate algal pond for urban wastewater treatment at demonstration scale. BIORESOURCE TECHNOLOGY 2020; 301:122672. [PMID: 31945681 DOI: 10.1016/j.biortech.2019.122672] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 12/19/2019] [Accepted: 12/21/2019] [Indexed: 05/26/2023]
Abstract
The objective of this study was to evaluate the performance of an outdoor membrane-coupled high-rate algal pond equipped with industrial-scale membranes for treating urban wastewater. Decoupling biomass retention time (BRT) and hydraulic retention time (HRT) by membrane filtration resulted in improved process efficiencies, with higher biomass productivities and nutrient removal rates when operating at low HRTs. At 6 days of BRT, biomass productivity increased from 30 to 66 and to 95 g·m-3·d-1 when operating at HRTs of 6, 4 and 2.5 days, respectively. The corresponding nitrogen removal rates were 4, 8 and 11 g N·m-3·d-1 and the phosphorous removal rates were 0.5, 1.3 and 1.6 g P·m-3·d-1. The system was operated keeping moderate specific air demands (0.25 m3·m-2·h-1), resulting in reasonable operating and maintenance costs (€0.04 per m3) and energy requirements (0.29 kWh per m3). The produced water was free of pathogens and could be directly used for reusing purposes.
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Affiliation(s)
- Ángel Robles
- Departament d'Enginyeria Química, Escola Tècnica Superior d'Enginyeria, Universitat de València, Avinguda de la Universitat s/n, 46100 Burjassot, Valencia, Spain.
| | - Gabriel Capson-Tojo
- CRETUS Institute, Department of Chemical Engineering, School of Engineering, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Amandine Gales
- LBE, Univ. Montpellier, INRA, 102 avenue des Etangs, 11100 Narbonne, France
| | - Alexandre Viruela
- Institut Universitari d'Investigació d'Enginyeria de l'Aigua i Medi Ambient (IIAMA), Universitat Politècnica de València, Camí de Vera s/n, 46022 Valencia, Spain
| | - Bruno Sialve
- LBE, Univ. Montpellier, INRA, 102 avenue des Etangs, 11100 Narbonne, France
| | - Aurora Seco
- Departament d'Enginyeria Química, Escola Tècnica Superior d'Enginyeria, Universitat de València, Avinguda de la Universitat s/n, 46100 Burjassot, Valencia, Spain
| | | | - José Ferrer
- Institut Universitari d'Investigació d'Enginyeria de l'Aigua i Medi Ambient (IIAMA), Universitat Politècnica de València, Camí de Vera s/n, 46022 Valencia, Spain
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18
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Cervantes-Gaxiola ME, Hernández-Calderón OM, Rubio-Castro E, Ortiz-del-Castillo JR, González-Llanes MD, Rios-Iribe EY. In silico study of the microalgae−bacteria symbiotic system in a stagnant pond. Comput Chem Eng 2020. [DOI: 10.1016/j.compchemeng.2020.106740] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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19
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Shen XF, Gao LJ, Zhou SB, Huang JL, Wu CZ, Qin QW, Zeng RJ. High fatty acid productivity from Scenedesmus obliquus in heterotrophic cultivation with glucose and soybean processing wastewater via nitrogen and phosphorus regulation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 708:134596. [PMID: 31780158 DOI: 10.1016/j.scitotenv.2019.134596] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Revised: 09/20/2019] [Accepted: 09/20/2019] [Indexed: 05/05/2023]
Abstract
In this study, the effects of nitrogen and phosphorus supply on biodiesel production from Scenedesmus obliquus with glucose as the carbon source were investigated. It was found that sufficient phosphorus could further improve biodiesel production under nitrogen starvation. S. obliquus was cultivated in soybean processing wastewater. The removal efficiencies of carbon oxygen demand (COD), total nitrogen (TN), and total phosphorus (TP) after 8-day cultivation were 72%, 95%, and 54%, respectively. Moreover, the fatty acid productivity after eight-day cultivation reached as high as 99.3 mg·L-1·d-1, which was 1.15 times higher than the highest efficiency using a glucose culture. This result was due to two naturally-formed stages occurring with sufficient phosphorus: nitrogen sufficiency stage for biomass and nitrogen starvation stage for lipid accumulation. It verified the conclusion of the roles of nitrogen and phosphorus obtained in the glucose culture and provided an economic and environmentally friendly choice for biodiesel production with efficient soybean wastewater treatment.
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Affiliation(s)
- Xiao-Fei Shen
- Anhui Provincial Engineering Laboratory of Water and Soil Pollution Control and Remediation, Anhui Normal University, Wuhu, Anhui 241000, PR China; College of Environmental Science and Engineering, Anhui Normal University, Wuhu, Anhui 241000, PR China
| | - Lin-Jun Gao
- Anhui Provincial Engineering Laboratory of Water and Soil Pollution Control and Remediation, Anhui Normal University, Wuhu, Anhui 241000, PR China; College of Environmental Science and Engineering, Anhui Normal University, Wuhu, Anhui 241000, PR China
| | - Shou-Biao Zhou
- Anhui Provincial Engineering Laboratory of Water and Soil Pollution Control and Remediation, Anhui Normal University, Wuhu, Anhui 241000, PR China; College of Environmental Science and Engineering, Anhui Normal University, Wuhu, Anhui 241000, PR China
| | - Jia-Le Huang
- Anhui Provincial Engineering Laboratory of Water and Soil Pollution Control and Remediation, Anhui Normal University, Wuhu, Anhui 241000, PR China; College of Environmental Science and Engineering, Anhui Normal University, Wuhu, Anhui 241000, PR China
| | - Chen-Zhi Wu
- Anhui Provincial Engineering Laboratory of Water and Soil Pollution Control and Remediation, Anhui Normal University, Wuhu, Anhui 241000, PR China; College of Environmental Science and Engineering, Anhui Normal University, Wuhu, Anhui 241000, PR China
| | - Qi-Wen Qin
- Anhui Provincial Engineering Laboratory of Water and Soil Pollution Control and Remediation, Anhui Normal University, Wuhu, Anhui 241000, PR China; College of Environmental Science and Engineering, Anhui Normal University, Wuhu, Anhui 241000, PR China
| | - Raymond Jianxiong Zeng
- Center of Wastewater Resource Recovery, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, PR China.
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20
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Fortunato L, Lamprea AF, Leiknes T. Evaluation of membrane fouling mitigation strategies in an algal membrane photobioreactor (AMPBR) treating secondary wastewater effluent. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 708:134548. [PMID: 31791793 DOI: 10.1016/j.scitotenv.2019.134548] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Revised: 07/21/2019] [Accepted: 09/17/2019] [Indexed: 06/10/2023]
Abstract
Microalgae-based advanced wastewater treatment has gained momentum due to the possibility of recovering nutrients for the production of fertilizers, biofuels and fine chemicals from microalgal biomass. The objective of this study is to evaluate the effect of different fouling control strategies on the development of Chlorella vulgaris in a membrane photobioreactor (AMPMBR) treating a secondary wastewater effluent. The experimental results showed a decrease in the fouling rate (bar/hours) of 50% for backwash and relaxation and 60% for nitrogen bubble scouring. Additionally, in-situ non-destructive real time monitoring was employed to visualize and assess the change in morphology of the algae formed on the membrane surface. The use of fouling mitigation led to substantial changes in the biomass morphologies impacting the performance of the AMPMBR. The lowest biomass deposition (5-10 µm) was observed when nitrogen bubble scouring was employed, while the application of relaxation led to the thickest (180 µm), most heterogeneous and porous structure. The use of backwash led to a partial temporary biomass detachment from the membrane surface. This study, provided a better understanding of the impact of fouling mitigation strategies on the biomass formed on the membrane of AMPMBR.
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Affiliation(s)
- Luca Fortunato
- Water Desalination and Reuse Center (WDRC), Division of Biological & Environmental Science & Engineering (BESE), 4700 King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.
| | - Andrés Felipe Lamprea
- Water Desalination and Reuse Center (WDRC), Division of Biological & Environmental Science & Engineering (BESE), 4700 King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - TorOve Leiknes
- Water Desalination and Reuse Center (WDRC), Division of Biological & Environmental Science & Engineering (BESE), 4700 King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
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21
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Solimeno A, Gómez-Serrano C, Acién FG. BIO_ALGAE 2: improved model of microalgae and bacteria consortia for wastewater treatment. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:25855-25868. [PMID: 31273656 DOI: 10.1007/s11356-019-05824-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Accepted: 06/24/2019] [Indexed: 06/09/2023]
Abstract
A new set up of the integral mechanistic BIO_ALGAE model that describes the complex interactions in mixed algal-bacterial systems was developed to overcome some restrictions of the model. BIO_ALGAE 2 includes new sub-models that take into account the variation of microalgae and bacteria performance as a function of culture conditions prevailing in microalgae cultures (pH, temperature, dissolved oxygen) over daily and seasonal cycles and the implementation of on-demand dioxide carbon injection for pH control. Moreover, another aim of this work was to study a correlation between the mass transfer coefficient and the hydrodynamics of reactor. The model was calibrated using real data from a laboratory reactor fed with real wastewater. Moreover, the model was used to simulate daily variations of different components in the pond (dissolved oxygen, pH, and CO2 injection) and to predict microalgae (XALG) and bacteria (XH) proportions and to estimate daily biomass production (Cb). The effect of CO2 injection and the influence of wastewater composition on treatment performance were investigated through practical study cases. XALG decreased by 38%, and XH increased by 35% with respect to the system under pH control while microalgae and bacteria proportions are completely different as a function of influent wastewater composition. Model simulations have indicated that Cb production (~ 100 gTSS m-3 day-1 for manure and centrate) resulted lower than Cb production obtained using primary influent wastewater (155 gTSS m-3 day-1).
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Affiliation(s)
- Alessandro Solimeno
- Department of Chemical Engineering, University of Almería, Ctra. Sacramento, s/n, La Cañada de San Urbano, 04120, Almeria, Spain.
| | - Cintia Gómez-Serrano
- Department of Chemical Engineering, University of Almería, Ctra. Sacramento, s/n, La Cañada de San Urbano, 04120, Almeria, Spain
| | - Francisco Gabriel Acién
- Department of Chemical Engineering, University of Almería, Ctra. Sacramento, s/n, La Cañada de San Urbano, 04120, Almeria, Spain
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22
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Wagner H, Jebsen C, Wilhelm C. Monitoring cellular C:N ratio in phytoplankton by means of FTIR-spectroscopy. JOURNAL OF PHYCOLOGY 2019; 55:543-551. [PMID: 30893470 DOI: 10.1111/jpy.12858] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Accepted: 01/04/2019] [Indexed: 06/09/2023]
Abstract
Statistical growth rate modelling can be applied in a variety of ecological and biotechnological applications. Such models are frequently based on Monod or Droop equations and, especially for the latter, require reliable determination of model input parameters such as C:N quotas. Besides growth rate modelling, a C:N quota quantification can be useful for monitoring and interpretation of physiological acclimation to abiotic and biotic disturbances (e.g., nutrient limitations). However, as high throughput C:N quota determination is difficult to perform, alternatives need to be established. Fourier-transformed infrared (FTIR) spectroscopy is used to analyze a variety of biochemical, chemical, and physiological parameters in phytoplankton. Hence, a quantification of the C:N quota should also be feasible. Therefore, using FTIR spectroscopy, six phytoplankton species from among different phylogenetic groups have been analyzed to determine the effect of nutrient limitation on C:N quota patterns. The typical species-specific response to increasing nitrogen limitation was an increase in the C:N quota. Irrespective of this species specificity, we were able to develop a reliable multi-species C:N quota prediction model based on FTIR spectroscopy using the partial least square regression (PLSR) algorithm. Our data demonstrate that the PLSR approach is more robust in C:N quota quantification (R2 = 0.93) than linear correlation of C:N quota versus growth rate (R2 ranges from 0.74 to 0.86) or biochemical information based on FTIR spectra (R2 ranges from 0.82 to 0.89). This accurate prediction of C:N values may support high throughput measurements in a broad range of future approaches.
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Affiliation(s)
- Heiko Wagner
- Department of Plant Physiology, Institute of Biology, Leipzig University, Johannisallee 21-23, D-04103, Leipzig, Germany
| | - Christian Jebsen
- Department of Plant Physiology, Institute of Biology, Leipzig University, Johannisallee 21-23, D-04103, Leipzig, Germany
| | - Christian Wilhelm
- Department of Plant Physiology, Institute of Biology, Leipzig University, Johannisallee 21-23, D-04103, Leipzig, Germany
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Deutscher Platz 5e, D-04103, Leipzig, Germany
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23
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Cea‐Barcia G, López‐Caamal F, Torres‐Zúñiga I, Hernández‐Escoto H. Biogas purification via optimal microalgae growth: A literature review. Biotechnol Prog 2018; 34:1513-1532. [DOI: 10.1002/btpr.2686] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2017] [Revised: 05/08/2018] [Indexed: 01/02/2023]
Affiliation(s)
- Glenda Cea‐Barcia
- Departamento de Ciencias Ambientales., División de Ciencias de la Vida del campus Irapuato‐SalamancaUniversidad de Guanajuato Irapuato Mexico
| | - Fernando López‐Caamal
- Departamento de Ingeniería Química, División de Ciencias Naturales y Exactas del campus Guanajuato.Universidad de Guanajuato Guanajuato Mexico
| | - Ixbalank Torres‐Zúñiga
- C. A. Telemática, Departamento de Ingeniería Electrónica., División de Ingenierías del campus Irapuato‐SalamancaUniversidad de Guanajuato Salamanca Mexico
| | - Héctor Hernández‐Escoto
- Departamento de Ingeniería Química, División de Ciencias Naturales y Exactas del campus Guanajuato.Universidad de Guanajuato Guanajuato Mexico
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24
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He Q, Chen L, Zhang S, Chen R, Wang H, Zhang W, Song J. Natural sunlight induced rapid formation of water-born algal-bacterial granules in an aerobic bacterial granular photo-sequencing batch reactor. JOURNAL OF HAZARDOUS MATERIALS 2018; 359:222-230. [PMID: 30036752 DOI: 10.1016/j.jhazmat.2018.07.051] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Revised: 06/25/2018] [Accepted: 07/11/2018] [Indexed: 06/08/2023]
Abstract
Wastewater treatment by means of algal-bacterial granules has become a hot topic worldwide recently. Rapid granulation of algal-bacterial granules was achieved in an aerobic bacterial granular sequencing batch reactor (SBR) under natural sunlight exposure. Occurrence of abundant filamentous bacteria bridging the water-born algae, and overproduction of extracellular polymeric substances (EPS) (especially polysaccharides (PS), tryptophan & protein-like, and humic acid-like substances) were observed on the first 3 days, while the algae grew into the inner side of the granules and mature granules were obtained on day 7. The growth of the water-born algae slightly decreased the settleability, mean sizes of the granules, but stimulated the bioactivity significantly. Whereas, the biomass retention decreased before day 3, and got stable soon with the maturation period with symbiotic growth of algal-bacterial biomass. Illumina results revealed that the introduction of algae reduced the richness and diversity of bacterial community. Besides, few changes in structure and some compositions shifts in bacterial communities were found, while the predominant algae shifted from Diatomea to green algae Chlorophyceae. The possible mechanism for natural sunlight induced granulation of algal-bacterial granules was thus proposed based on the interactions between algae and bacteria.
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Affiliation(s)
- Qiulai He
- School of Civil Engineering, Wuhan University, Wuhan, China
| | - Li Chen
- School of Civil Engineering, Wuhan University, Wuhan, China
| | - Shujia Zhang
- School of Civil Engineering, Wuhan University, Wuhan, China
| | - Rongfan Chen
- School of Civil Engineering, Wuhan University, Wuhan, China
| | - Hongyu Wang
- School of Civil Engineering, Wuhan University, Wuhan, China.
| | - Wei Zhang
- School of Civil Engineering, Wuhan University, Wuhan, China
| | - Jianyang Song
- School of Civil Engineering, Wuhan University, Wuhan, China
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25
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Eze VC, Velasquez-Orta SB, Hernández-García A, Monje-Ramírez I, Orta-Ledesma MT. Kinetic modelling of microalgae cultivation for wastewater treatment and carbon dioxide sequestration. ALGAL RES 2018. [DOI: 10.1016/j.algal.2018.03.015] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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26
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Huy M, Kumar G, Kim HW, Kim SH. Photoautotrophic cultivation of mixed microalgae consortia using various organic waste streams towards remediation and resource recovery. BIORESOURCE TECHNOLOGY 2018; 247:576-581. [PMID: 28982087 DOI: 10.1016/j.biortech.2017.09.108] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 09/13/2017] [Accepted: 09/15/2017] [Indexed: 06/07/2023]
Abstract
In this study, mixed microalgae consortia was cultivated using digestate (D), animal manure (AM) and textile wastewater (TW) as growth medium providing mainly N (nitrogen) and P (phosphorous) sources without any extra nutrient addition. The corresponding total nitrogen (TN) and total phosphorous (TP, PO3-P) concentrations were noted as 323 and 21 for AM, 481 and 31 for TW and 747 and 55mg/L for D, respectively. After a cultivation period of 13days, P were completely removed (100%), however, N was still remain and attained the removal rate of 70.1, 72.3 and 16.7% for TW, AM and D, respectively. The peak growth rate and biomass production of 0.419d-1 and 0.4g/L (in terms of volatile solids, VS) was achieved using TW as growth medium.
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Affiliation(s)
- Menghour Huy
- Department of Environmental Engineering, Daegu University, Gyeongsan, Geoungbuk 38453, Republic of Korea
| | - Gopalakrishnan Kumar
- Department of Environmental Engineering, Daegu University, Gyeongsan, Geoungbuk 38453, Republic of Korea
| | - Hyun-Woo Kim
- Department of Environmental Engineering, Chonbuk National University, Jeonju, Jeonbuk 54896, Republic of Korea
| | - Sang-Hyoun Kim
- Department of Environmental Engineering, Daegu University, Gyeongsan, Geoungbuk 38453, Republic of Korea; Sustainable Environmental Process Research Institute, Daegu University, Gyeongsan, Gyeongbuk 38453, South Korea.
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