1
|
Namli A, Akca MO, Perendeci NA, Yilmaz V, Ertit Tastan B. Effect of pretreated and anaerobically digested microalgae on the chemical and biochemical properties of soil and wheat grown on fluvisol. ENVIRONMENTAL TECHNOLOGY 2024; 45:2833-2846. [PMID: 36919910 DOI: 10.1080/09593330.2023.2192364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Accepted: 02/13/2023] [Indexed: 06/18/2023]
Abstract
In this study, the effects of the potential application of digestate as an agricultural fertiliser obtained from anaerobically digested microalgae treated by three pretreatment methods, namely alkaline hydrogen peroxide (AHP), high temperature and pressure (HTP), and hydrodynamic cavitation (HC) on some properties of soil, and wheat growth and yield were investigated. For this purpose, pretreated and anaerobically digested microalgae digestates alone or together with diammonium phosphate (DAP) as a chemical fertiliser were applied to soil for wheat growth. The highest dosage of AHP pretreated digestate combined with a half dose of DAP applied to soil was rich in nutrients as 0.25%N and 7.19 mg kg-1 compared to all groups. The properties of the soils were enhanced by applying the highest dosage (0.06 g kg-1) of microalgae digestate combined with a half dose of DAP. 0.02 g kg-1 dosage of HC pretreated digestate combined with a half dose of DAP also greatly improved nitrogen use efficiency indices by up to 104%. The soils' enzyme activities increased in wheat growth experiments by applying either raw or pretreated microalgae digestates. The soils' β-glycosidase, alkaline phosphatase, and urease enzyme activities increased to 1.38 mg pNP g-1 soil, 4.91 mg pNP g-1 soil, and 2.27 mg NH4-N 100 g-1 soil respectively by the application of highest dosage of HC pretreated digestate. The digestates did not have a toxic effect on wheat growth, it was determined that applied pretreatment processes did not cause significant changes in wheat plant height or wet and dry weight.
Collapse
Affiliation(s)
- Ayten Namli
- Faculty of Agriculture, Department of Soil Science and Plant Nutrition, Ankara University, Ankara, Turkey
| | - Muhittin Onur Akca
- Faculty of Agriculture, Department of Soil Science and Plant Nutrition, Ankara University, Ankara, Turkey
| | - Nuriye Altinay Perendeci
- Engineering Faculty, Department of Environmental Engineering, Akdeniz University, Antalya, Turkey
| | - Vedat Yilmaz
- Engineering Faculty, Department of Environmental Engineering, Artvin Çoruh University, Artvin, Turkey
| | - Burcu Ertit Tastan
- Health Services Vocational School, Gazi University, Ankara, Turkey
- Life Sciences Application and Research Center, Gazi University, Ankara, Turkey
| |
Collapse
|
2
|
Dębowski M, Dudek M, Nowicka A, Quattrocelli P, Kazimierowicz J, Zieliński M. Suitability of pre-digested dairy effluent for mixotrophic cultivation of the hydrogen-producing microalgae Tetraselmis subcordiformis. ENVIRONMENTAL TECHNOLOGY 2024; 45:471-482. [PMID: 35960006 DOI: 10.1080/09593330.2022.2112981] [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: 05/09/2022] [Accepted: 08/06/2022] [Indexed: 06/15/2023]
Abstract
The costs associated with microalgal biomass production can be reduced by leveraging alternative and cheap growth media. Digestate from fermentation reactors is a particularly interesting candidate for use in cultivating mixotrophic species. The aim of the present study was to assess whether pre-digested milk-industry effluent can be harnessed to grow Tetraselmis subcordiformis and produce hydrogen. The experimental series with 25% and 50% effluent in the growth medium performed the best, producing more than 2000 mgVS biomass/dm3. The biogas produced in these variants contained over 60% hydrogen. Increasing the effluent in the medium to 75% led to significant deterioration of performance, both in terms of T. subcordiformis biomass growth and biohydrogen production. The highest efficiency of nitrogen and phosphorus removal, respectively 98.1 ± 1.9% and 97.1 ± 1.4%, was observed in the system to which 25% of sewage was introduced. Increasing the share of fermented wastewater directly reduced the efficiency of removing biogenic compounds. A very strong negative correlation was found between initial N-NH4 in the growth medium and T. subcordiformis biomass production rates (R2 = 0.9177).
Collapse
Affiliation(s)
- Marcin Dębowski
- Department of Environment Engineering, Faculty of Geoengineering, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
| | - Magda Dudek
- Department of Environment Engineering, Faculty of Geoengineering, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
| | - Anna Nowicka
- Department of Environment Engineering, Faculty of Geoengineering, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
| | - Piera Quattrocelli
- Sant'Anna School of Advanced Studies, Institute of Life Sciences, BioLabs, Ghezzano, Pisa, Italy
| | - Joanna Kazimierowicz
- Department of Water Supply and Sewage Systems, Faculty of Civil Engineering and Environmental Sciences, Bialystok University of Technology, Bialystok, Poland
| | - Marcin Zieliński
- Department of Environment Engineering, Faculty of Geoengineering, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
| |
Collapse
|
3
|
Al Bazedi G, Soliman N, Sewilam H. Biofouling mechanism and cleaning procedures for Spirulina platensis as an organic fertilizer draw solution. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:91355-91368. [PMID: 37479923 PMCID: PMC10439861 DOI: 10.1007/s11356-023-28694-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Accepted: 07/05/2023] [Indexed: 07/23/2023]
Abstract
The forward osmosis (FO) desalination process has recently acknowledged a lot of attention as a promising solution for reducing the disadvantages of existing desalination systems. This work aimed to investigate the effect of a selected liquid organic fertilizer a novel draw solution produced from "microalgae Spirulina platensis" on the biofouling mechanism of FO membrane. Different draw solution (DS) concentrations ranging 240-480 g/L were examined, obtained water flux ranging from 6.5 to 3.4 Lm2h-1. A high flux decline was observed when using higher DS concentrations due to fouling layer accumulated throughout the membrane area which lowers the effective osmotic pressure difference. Different cleaning strategies were examined. The biofouled membrane was cleaned on-line with deionized water (DI) and externally using ultrasound (US) and HCl. Baseline experiments were done to investigate the efficiency of the cleaning strategies. After cleaning using the deionized water (DI) water, it was found that the water flux progressed from 3.4 to 7 Lm2h-1, while when using acid cleaning the flux recovered to 15 Lm-2h-1. The efficacy and amount of foulant removed by each cleaning stage were assessed using scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX).
Collapse
Affiliation(s)
- Ghada Al Bazedi
- Center for Applied Research on the Environment and Sustainability (CARES), School of Science and Engineering, The American University in Cairo, AUC Avenue, P.O. Box: 74, New Cairo, 11835, Egypt
- Chemical Engineering Department, Engineering and Renewable Energy Research Institute, 33 El-Bohouth St., Dokki, PO Box 12622, Giza, Egypt
| | - Noha Soliman
- Center for Applied Research on the Environment and Sustainability (CARES), School of Science and Engineering, The American University in Cairo, AUC Avenue, P.O. Box: 74, New Cairo, 11835, Egypt
| | - Hani Sewilam
- Center for Applied Research on the Environment and Sustainability (CARES), School of Science and Engineering, The American University in Cairo, AUC Avenue, P.O. Box: 74, New Cairo, 11835, Egypt.
- Department of Engineering Hydrology, RWTH Aachen University, Mies-van-der-Rohe Strasse 17, 52074, Aachen, Germany.
| |
Collapse
|
4
|
Fal S, Aasfar A, Ouhssain A, Choukri H, Smouni A, El Arroussi H. Aphanothece sp. as promising biostimulant to alleviate heavy metals stress in Solanum lycopersicum L. by enhancing physiological, biochemical, and metabolic responses. Sci Rep 2023; 13:6875. [PMID: 37106012 PMCID: PMC10140289 DOI: 10.1038/s41598-023-32870-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 04/04/2023] [Indexed: 04/29/2023] Open
Abstract
Heavy metals (H.M) are a major environmental concern around the world. They have harmful impact on plant productivity and pose a serious risk to humans and animals health. In the present study, we investigated the effect of Aphanothece crude extract (ACE) on physiological, biochemical, and metabolic responses of tomato plant exposed to 2 mM Pb and Cd. The results showed a significant reduction of tomato plant weights and perturbation in nutrients absorption under 2 mM Pb and Cd conditions. Moreover, ACE treatment showed a significant enhancement of plant biomass compared to plants under Pb and Cd. On the other hand, ACE application favoured H.M accumulation in root and inhibited their translocation to shoot. In addition, ACE treatment significantly enhanced several stress responses in plant under Pb and Cd stress such as scavenging enzymes and molecules: POD, CAT, SOD, proline, and polyphenols etc. Furthermore, ACE treatment showed remodulation of metabolic pathways related to plant tolerance such as wax construction mechanism, particularly SFA, UFA, VLFA, alkanes, alkenes, and sterols biosynthesis to enhance tolerance and resistance to H.M stress. In the present study, we emphasized that ACE alleviates H.M stress by minimizing metal translocation to above-part of plant and enhancing plant growth, nutrients absorption, and biochemical responses.
Collapse
Affiliation(s)
- Soufiane Fal
- Algal Biotechnology Laboratory, Rabat Design Center, Moroccan Foundation for Advanced Science, Innovation and Research (MASCIR), Rue Mohamed Al Jazouli - Madinat Al Irfane, Rabat, Morocco.
- Plant Physiology and Biotechnology Team, Center of Plant and Microbial Biotechnology, Biodiversity and Environment, Faculty of Sciences, Mohammed V University in Rabat, Rabat, Morocco.
| | - Abderrahim Aasfar
- Algal Biotechnology Laboratory, Rabat Design Center, Moroccan Foundation for Advanced Science, Innovation and Research (MASCIR), Rue Mohamed Al Jazouli - Madinat Al Irfane, Rabat, Morocco
| | - Ali Ouhssain
- Algal Biotechnology Laboratory, Rabat Design Center, Moroccan Foundation for Advanced Science, Innovation and Research (MASCIR), Rue Mohamed Al Jazouli - Madinat Al Irfane, Rabat, Morocco
| | - Hasnae Choukri
- International Center for Agricultural Research in the Dry Areas (ICARDA), Rabat, Morocco
| | - Abelaziz Smouni
- Plant Physiology and Biotechnology Team, Center of Plant and Microbial Biotechnology, Biodiversity and Environment, Faculty of Sciences, Mohammed V University in Rabat, Rabat, Morocco
| | - Hicham El Arroussi
- Algal Biotechnology Laboratory, Rabat Design Center, Moroccan Foundation for Advanced Science, Innovation and Research (MASCIR), Rue Mohamed Al Jazouli - Madinat Al Irfane, Rabat, Morocco.
- Agrobiosciences Program, University Mohamed 6 Polytechnic (UM6P), Ben Guerir, Morocco.
| |
Collapse
|
5
|
Asaoka S, Yoshida G, Ihara I. Sustained release properties of cement-bonded composites with organic waste based anaerobic digestate as nutrient carriers for marine microalgae. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:56343-56352. [PMID: 36914929 DOI: 10.1007/s11356-023-26355-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Accepted: 03/05/2023] [Indexed: 06/18/2023]
Abstract
Anaerobic digestate is an organic effluent from biogas plants that generate renewable energy from organic waste under anaerobic conditions. Cement-bonded digestate composites with digestates based on animal manure and food waste based were subjected to sustained release property tests to investigate their utility as nutrient carriers for phytoplankton grown in oligotrophic coastal seas. Batch experiments showed that inorganic phosphate, ammonium nitrogen, and dissolved organic nitrogen species were released from the cement-bonded digestate composite. The inorganic phosphate and ammonium nitrogen were used directly by phytoplankton. The amount of inorganic phosphate and ammonium nitrogen released from the cement-bonded digestate composite was strongly correlated with the inorganic phosphate or nitrogen levels in the composite. This correlation allowed us to estimate the amount of these compounds released from the cement-bonded digestate composite from their concentration of in the anaerobic digestate reactants. The nutrients released from the cement-bonded digestate composite were taken up by marine microalgae, making these composites an effective terrigenous nutrient carrier for the growth of marine microalgae. The cement-bonded digestate composite developed in this study connects terrigenous anaerobic digestate from biogas plants to oligotrophic coastal seas and thus creates a novel nutrient pathway.
Collapse
Affiliation(s)
- Satoshi Asaoka
- Graduate School of Integrated Sciences for Life, Hiroshima University, 1-4-4 Kagamiyama, Higashihiroshima, 739-8528, Japan.
| | - Gen Yoshida
- Graduate School of Agricultural Science, Kobe University, 1-1 Rokkodai, Nada, Kobe, Hyogo, 657-8501, Japan
| | - Ikko Ihara
- Graduate School of Agricultural Science, Kobe University, 1-1 Rokkodai, Nada, Kobe, Hyogo, 657-8501, Japan
| |
Collapse
|
6
|
Álvarez-González A, Uggetti E, Serrano L, Gorchs G, Ferrer I, Díez-Montero R. Can microalgae grown in wastewater reduce the use of inorganic fertilizers? JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 323:116224. [PMID: 36126597 DOI: 10.1016/j.jenvman.2022.116224] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 09/05/2022] [Accepted: 09/06/2022] [Indexed: 06/15/2023]
Abstract
Alternatives to conventional inorganic fertilizers are needed to cope with the growing global population and contamination due to the production and use of those inorganic compounds. The recovery of nutrients from wastewater and organic wastes is a promising option to provide fertilization in a circular economy approach. In this context, microalgae-based systems are an alternative to conventional wastewater treatment systems, reducing the treatment costs and improving the sustainability of the process, while producing nutrient-rich microalgal biomass. The aim of the present study is to evaluate the use of microalgal biomass produced during domestic wastewater treatment in high rate algal ponds as a biofertilizer in basil crops (Ocimum basilicum L.). Wastewater was successfully treated, with removal efficiencies in the secondary treatment of 69, 91 and 81% in terms of chemical oxygen demand (COD), total inorganic nitrogen (TIN) and phosphates (PO43-P), respectively. The microalgal biomass, composed mainly by Scenedesmus, presented the following composition: 12% of dry weight and nutrients concentration of 7.6% nitrogen (N), 1.6% phosphorus (P) and 0.9% potassium (K). The study compared the performance of 3 different fertilizers: 1) microalgae fertilizer (MF), 2) inorganic fertilizer (IF) as positive control and 3) the combination of both microalgae and inorganic fertilizer (MF + IF). Comparable plant growth (i.e., number of leaves, shoot fresh and dry weight and leaf fresh weight) was observed among treatments, except for leaf dry weight, which was significantly higher in the IF + MF and MF treatments (28 and 27%, respectively) in comparison with the control. However, the microalgae treatment provided the lowest chlorophyll, N and K leaf content. In conclusion, this study suggests that combining microalgae grown in wastewater with an inorganic fertilizer is a promising nutrients source for basil crops, enhancing the circular bioeconomy.
Collapse
Affiliation(s)
- Ana Álvarez-González
- GEMMA - Group of Environmental Engineering and Microbiology, Department of Civil and Environmental Engineering, Universitat Politècnica de Catalunya·BarcelonaTech, Jordi Girona 1-3, Building D1, 08034, Barcelona, Spain
| | - Enrica Uggetti
- GEMMA - Group of Environmental Engineering and Microbiology, Department of Civil and Environmental Engineering, Universitat Politècnica de Catalunya·BarcelonaTech, Jordi Girona 1-3, Building D1, 08034, Barcelona, Spain.
| | - Lydia Serrano
- Department of Agri-Food Engineering and Biotechnology, Universitat Politècnica de Catalunya BarcelonaTech, c/ Esteve Terradas 8, 08860, Castelldefels, Spain
| | - Gil Gorchs
- Department of Agri-Food Engineering and Biotechnology, Universitat Politècnica de Catalunya BarcelonaTech, c/ Esteve Terradas 8, 08860, Castelldefels, Spain
| | - Ivet Ferrer
- GEMMA - Group of Environmental Engineering and Microbiology, Department of Civil and Environmental Engineering, Universitat Politècnica de Catalunya·BarcelonaTech, Jordi Girona 1-3, Building D1, 08034, Barcelona, Spain
| | - Rubén Díez-Montero
- GEMMA - Group of Environmental Engineering and Microbiology, Department of Civil and Environmental Engineering, Universitat Politècnica de Catalunya·BarcelonaTech, Jordi Girona 1-3, Building D1, 08034, Barcelona, Spain; GIA - Group of Environmental Engineering, Department of Water and Environmental Sciences and Technologies, Universidad de Cantabria, Avda. Los Castros s/n, 39005, Santander, Spain
| |
Collapse
|
7
|
Chong CC, Cheng YW, Ishak S, Lam MK, Lim JW, Tan IS, Show PL, Lee KT. Anaerobic digestate as a low-cost nutrient source for sustainable microalgae cultivation: A way forward through waste valorization approach. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 803:150070. [PMID: 34525689 DOI: 10.1016/j.scitotenv.2021.150070] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Revised: 08/14/2021] [Accepted: 08/28/2021] [Indexed: 06/13/2023]
Abstract
To suffice the escalating global energy demand, microalgae are deemed as high potential surrogate feedstocks for liquid fuels. The major encumbrance for the commercialization of microalgae cultivation is due to the high costs of nutrients such as carbon, phosphorous, and nitrogen. Meanwhile, the organic-rich anaerobic digestate which is difficult to be purified by conventional techniques is appropriate to be used as a low-cost nutrient source for the economic viability and sustainability of microalgae production. This option is also beneficial in terms of reutilize the organic fraction of solid waste instead of discarded as zero-value waste. Anaerobic digestate is the side product of biogas production during anaerobic digestion process, where optimum nutrients are needed to satisfy the physiological needs to grow microalgae. Besides, the turbidity, competing biological contaminants, ammonia and metal toxicity of the digestate are also potentially contributing to the inhibition of microalgae growth. Thus, this review is aimed to explicate the feasibility of utilizing the anaerobic digestate to cultivate microalgae by evaluating their potential challenges and solutions. The proposed potential solutions (digestate dilution and pre-treatment, microalgae strain selection, extra organics addition, nitrification and desulfurization) corresponding to the state-of-the-art challenges are applicable as future directions of the research.
Collapse
Affiliation(s)
- Chi Cheng Chong
- Department of Chemical Engineering, School of Engineering and Computing, Manipal International University, 71800 Putra Nilai, Negeri Sembilan, Malaysia
| | - Yoke Wang Cheng
- Department of Chemical Engineering, School of Engineering and Computing, Manipal International University, 71800 Putra Nilai, Negeri Sembilan, Malaysia
| | - Syukriyah Ishak
- Chemical Engineering Department, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak, Malaysia; HICoE-Centre for Biofuel and Biochemical Research (CBBR), Institute for Self-sustainable Building, 32610 Seri Iskandar, Perak, Malaysia
| | - Man Kee Lam
- Chemical Engineering Department, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak, Malaysia; HICoE-Centre for Biofuel and Biochemical Research (CBBR), Institute for Self-sustainable Building, 32610 Seri Iskandar, Perak, Malaysia.
| | - Jun Wei Lim
- HICoE-Centre for Biofuel and Biochemical Research (CBBR), Institute for Self-sustainable Building, 32610 Seri Iskandar, Perak, Malaysia; Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak, Malaysia
| | - Inn Shi Tan
- Department of Chemical Engineering, Curtin University, Sarawak Campus CDT 250, 98009 Miri, Sarawak, Malaysia
| | - Pau Loke Show
- Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham Malaysia, Jalan Broga, Semenyih 43500, Selangor, Malaysia
| | - Keat Teong Lee
- School of Chemical Engineering, Universiti Sains Malaysia, Engineering Campus, Seri Ampangan, 14300 Nibong Tebal, Pulau Pinang, Malaysia
| |
Collapse
|
8
|
Çakirsoy I, Miyamoto T, Ohtake N. Physiology of microalgae and their application to sustainable agriculture: A mini-review. FRONTIERS IN PLANT SCIENCE 2022; 13:1005991. [PMID: 36466259 PMCID: PMC9712798 DOI: 10.3389/fpls.2022.1005991] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Accepted: 10/24/2022] [Indexed: 05/13/2023]
Abstract
Concern that depletion of fertilizer feedstocks, which are a finite mineral resource, threatens agricultural sustainability has driven the exploration of sustainable methods of soil fertilization. Given that microalgae, which are unicellular photosynthetic organisms, can take up nutrients efficiently from water systems, their application in a biological wastewater purification system followed by the use of their biomass as a fertilizer alternative has attracted attention. Such applications of microalgae would contribute to the accelerated recycling of nutrients from wastewater to farmland. Many previous reports have provided information on the physiological characteristics of microalgae that support their utility. In this review, we focus on recent achievements of studies on microalgal physiology and relevant applications and outline the prospects for the contribution of microalgae to the establishment of sustainable agricultural practices.
Collapse
Affiliation(s)
- Iffet Çakirsoy
- Graduate School of Science and Technology, Niigata University, Niigata, Japan
| | - Takuji Miyamoto
- Sakeology Center, Niigata University, Niigata, Japan
- *Correspondence: Takuji Miyamoto, ; Norikuni Ohtake,
| | - Norikuni Ohtake
- Graduate School of Science and Technology, Niigata University, Niigata, Japan
- *Correspondence: Takuji Miyamoto, ; Norikuni Ohtake,
| |
Collapse
|
9
|
Santin A, Russo MT, Ferrante MI, Balzano S, Orefice I, Sardo A. Highly Valuable Polyunsaturated Fatty Acids from Microalgae: Strategies to Improve Their Yields and Their Potential Exploitation in Aquaculture. Molecules 2021; 26:7697. [PMID: 34946780 PMCID: PMC8707597 DOI: 10.3390/molecules26247697] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 12/14/2021] [Accepted: 12/15/2021] [Indexed: 11/16/2022] Open
Abstract
Microalgae have a great potential for the production of healthy food and feed supplements. Their ability to convert carbon into high-value compounds and to be cultured in large scale without interfering with crop cultivation makes these photosynthetic microorganisms promising for the sustainable production of lipids. In particular, microalgae represent an alternative source of polyunsaturated fatty acids (PUFAs), whose consumption is related to various health benefits for humans and animals. In recent years, several strategies to improve PUFAs' production in microalgae have been investigated. Such strategies include selecting the best performing species and strains and the optimization of culturing conditions, with special emphasis on the different cultivation systems and the effect of different abiotic factors on PUFAs' accumulation in microalgae. Moreover, developments and results obtained through the most modern genetic and metabolic engineering techniques are described, focusing on the strategies that lead to an increased lipid production or an altered PUFAs' profile. Additionally, we provide an overview of biotechnological applications of PUFAs derived from microalgae as safe and sustainable organisms, such as aquafeed and food ingredients, and of the main techniques (and their related issues) for PUFAs' extraction and purification from microalgal biomass.
Collapse
Affiliation(s)
- Anna Santin
- Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Naples, Italy; (A.S.); (M.T.R.); (S.B.); (I.O.)
| | - Monia Teresa Russo
- Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Naples, Italy; (A.S.); (M.T.R.); (S.B.); (I.O.)
| | - Maria Immacolata Ferrante
- Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Naples, Italy; (A.S.); (M.T.R.); (S.B.); (I.O.)
| | - Sergio Balzano
- Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Naples, Italy; (A.S.); (M.T.R.); (S.B.); (I.O.)
- Department of Marine Microbiology and Biogeochemistry, Netherland Institute for Sea Research, Landsdiep 4, 1793 AB Texel, The Netherlands
| | - Ida Orefice
- Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Naples, Italy; (A.S.); (M.T.R.); (S.B.); (I.O.)
| | - Angela Sardo
- Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Naples, Italy; (A.S.); (M.T.R.); (S.B.); (I.O.)
- Istituto di Scienze Applicate e Sistemi Intelligenti “Eduardo Caianiello”, Via Campi Flegrei 34, 80078 Pozzuoli, Italy
| |
Collapse
|
10
|
González-Pérez BK, Rivas-Castillo AM, Valdez-Calderón A, Gayosso-Morales MA. Microalgae as biostimulants: a new approach in agriculture. World J Microbiol Biotechnol 2021; 38:4. [PMID: 34825262 DOI: 10.1007/s11274-021-03192-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Accepted: 11/17/2021] [Indexed: 11/29/2022]
Abstract
This review aims to elucidate the state of the art of microalgae-based biostimulants as a tool in agriculture by summarizing the biologically active compounds factors that influence the use of microalgae biostimulants and their application methods in the field. Additionally, we examined the factors that support the use of microalgal biostimulants to face abiotic and biotic stress in crop plants. The use of microalgae in crop production and the benefits of seed preparation, foliar application, soil drenching, and hydroponic treatments were discussed. Furthermore, the use of these biostimulants in crop plants and their multiple benefits such as, better rooting, higher crop, fruit yields, drought and salinity tolerance, photosynthetic activity and pathogen resistance was thoroughly presented. The present situation of microalgal biostimulants and their difficulties in the market was analyzed, as well as the perspectives of their use. However, data shows that microalgal derived biostimulants can be used as an alternative for the protection of crops and plant growth regulators and play a significant key role in increasing the levels of production, yield and health of crops. Special interest needs to focus on investigating more microalgae species and their biological active compound factors, due to the largely untapped field. Perspectives regarding future research lines and development priorities were included.
Collapse
|
11
|
Elalami D, Oukarroum A, Barakat A. Anaerobic digestion and agronomic applications of microalgae for its sustainable valorization. RSC Adv 2021; 11:26444-26462. [PMID: 35480019 PMCID: PMC9037636 DOI: 10.1039/d1ra04845g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Accepted: 07/20/2021] [Indexed: 11/21/2022] Open
Abstract
Microalgae are considered potential candidates in biorefinery processes, and due to their biochemical properties, they can be used in the production of biofuels such as biogas, as well as for bioremediation of liquid effluents. The objective of this review is to study the current status of microalgae anaerobic digestion and agricultural uses (as bio-stimulants and biofertilizers), starting from microalgae cultivation. Indeed, the efficiency of these processes necessarily depends on the evaluation of different biotic and abiotic factors that affect the growth of microalgae. However, the adaptation and the optimization of process parameters on a large scale is also limited by energy and economic constraints. Moreover, the integration of biogas production processes with microalgae cultivation allows a nutrients and CO2 virtuous loop, thus promoting the sustainability of the process. Finally, this paper provides a general overview of biogas and biofertilizers production combination, as well as the related challenges and recommended future research perspectives to complement the gap in the literature.
Collapse
Affiliation(s)
- Doha Elalami
- AgroBioSciences, Mohammed VI Polytechnic University (UM6P) Ben Guérir Morocco
| | - Abdallah Oukarroum
- AgroBioSciences, Mohammed VI Polytechnic University (UM6P) Ben Guérir Morocco
| | - Abdellatif Barakat
- AgroBioSciences, Mohammed VI Polytechnic University (UM6P) Ben Guérir Morocco
- IATE, University of Montpellier, INRAE, Agro Institut Montpellier 34060 France
| |
Collapse
|
12
|
Abstract
This study investigated the applied methods for the collection and treatment of an organic fraction of municipal solid waste with anaerobic digestion (AD), including the effects of selective waste collection system introduction. As the research area, data from a waste treatment plant, which collects waste from about 260,000 inhabitants, was used as the selected waste management plan. Biowaste stream management was emphasized. Thus, research on energy recovery and the characteristics of digestate (nutrient and heavy metals content) obtained from biowaste AD was performed. The results of the studies and their quantitative data were interpreted. A significant discrepancy between the assumptions and the actual situation was revealed (up to 20% year-on-year regarding biowaste). An underestimation of the amount of waste when planning was noted. AD ensures energy recovery from biowaste, which can cover facility electricity needs and material recovery. The digestate might find agricultural usage and become an ecological product. The content of nitrogen (1.5%dry matter), phosphorus (0.55%dry matter), potassium (1.0%dry matter), and organic carbon (16.0%dry matter) indicate a positive impact on crops. Furthermore, it can improve the economic balance, by replacing costs with sales revenues.
Collapse
|
13
|
Correlations between the Composition of Liquid Fraction of Full-Scale Digestates and Process Conditions. ENERGIES 2021. [DOI: 10.3390/en14040971] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Fast development of centralized agricultural biogas plants leads to high amounts of digestate production. The treatment and disposal of liquid fractions after on-site digestate solid–liquid separation remains problematic due to their high organic, nutrient and aromatic contents. This work aims to study the variability of the remaining compounds in the digestate liquid fractions in relation to substrate origin, process parameters and solid–liquid separation techniques. Twenty-nine digestates from full-scale codigestion biogas plants and one waste activated sludge (WAS) digestate were collected and characterized. This study highlighted the combined effect of the solid–liquid separation process and the anaerobic digestion feedstock on the characteristics of liquid fractions of digestates. Two major clusters were found: (1) liquid fractions from high efficiency separation process equipment (e.g., centrifuge and others with addition of coagulant, flocculent or polymer) and (2) liquid fractions from low efficiency separation processes (e.g., screw press, vibrating screen and rotary drum), in this latter case, the concentration of chemical oxygen demand (COD) was associated with the proportion of cow manure and energy crops at biogas plant input. Finally, SUVA254, an indicator for aromatic molecule content and the stabilization of organic matter, was associated with the hydraulic retention time (HRT).
Collapse
|