Duckweed biorefinery – Potential to remediate dairy wastewater in integration with microbial protein production

Hemalatha, M.; Mohan, S. Venkata

doi:10.1016/j.biortech.2021.126499

Cited by 14 publications

(3 citation statements)

References 42 publications

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“…The lowest median values of RGRα(N) were observed in fronds of HM, with a value of 0.033 d −1 in the first phase, corresponding to doubling times of 21 days. These values are significantly lower than those reported in the literature for L. minuta and other duckweeds (0.1 ~ 0.5) [ 30 , 31 ]. This may be explained by the relatively long duration of the experiment, as an increase in culture duration may lead to lower doubling time [ 32 , 33 ].…”

Section: Discussioncontrasting

confidence: 68%

Characterization of the physico-chemical properties of the natural habitat and in vitro culture effects on the biochemistry, proliferation and morphology of Lemna minuta

et al. 2023

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In this study, the ecological conditions of the natural habitat of Lemna minuta Kunth in Morocco were investigated, and the impact of five synthetic growth media (Murashige-Skoog (MS), Schenk-Hildebrand (SH), Hoagland medium (HM), 10X Algal Assay Procedure (AAP), and Swedish Standard Institute medium (SIS)) on the morphophysiological and biochemical parameters was analysed. The morphophysiological parameters included root length, frond surface area, and fresh weight, while the biochemical parameters included photosynthetic pigments, carbohydrates, and protein content. The study was conducted in vitro in two phases: an uncontrolled aeration system (Phase I) and a controlled aeration system (Phase II).The results showed that the pH, conductivity, salinity, and ammonium levels in the natural habitat were within the optimal range for duckweed growth. The measured orthophosphate concentrations were higher compared to previous observations, while the recorded chemical oxygen demand values were low. The study also revealed a significant effect of the culture medium composition on the morphophysiological and biochemical parameters of the duckweed. The fresh weight biomass, relative growth rate in fronds, relative growth rate in surface area, root length, protein content, carbohydrates, chlorophyll (a), chlorophyll (b), total chlorophyll, carotenoids, and the chlorophyll (a/b) ratio were all affected by the culture medium.The most accurate regression models described the growth index GI(F) based on time and in vitro culture conditions in both phases. In Phase I, the best models for MS, SIS, AAP, and SH media were linear, weighted quadratic, cubic, and weighted cubic, respectively. In Phase II, the best models for all growth media were linear. The time coefficients (in days) for Phase II were 0.321, 0.547, 1.232, 1.470, and 0.306 for AAP, HM, MS, SH, and SIS, respectively.Comparing the morphophysiological and biochemical parameters of fronds from different media and analysing the regression model results showed that the SH and MS media were the best among the tested media for the in vitro culture of L. minuta in controlled aeration conditions. However, further research is needed to develop new synthetic media that best promote the growth and maintenance of this duckweed in long-term culture.

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Section: Discussioncontrasting

confidence: 68%

Characterization of the physico-chemical properties of the natural habitat and in vitro culture effects on the biochemistry, proliferation and morphology of Lemna minuta

et al. 2023

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“…Phytoremediation efficiency of Lemna minor was evaluated for treating dairy effluents and focused on utilizing the generated biomass having protein, carbohydrate, lipid and amino acid contents around 58 %, 29.5 %, 15.6 %, and 34.04 %, respectively, as nutrition for producing microbial protein 140. For instance, phytoremediation of dairy wastewater using Eichhornia crassipes post anaerobic digestion led to generation of biomass of Eichhornia crassipes which can be utilized to produce ethanol, activated carbon, heavy metal and sugar adsorbents (through enzymatic hydrolysis), fodder, animal feed, biocompost with mineral nutrients (N, P, and K), and other products 141.…”

Section: Integrated/hybrid Approaches With Resource Recoverymentioning

confidence: 99%

Section: Resource Recoverymentioning

confidence: 99%

Phytoremediation: A Shift Towards Sustainability for Dairy Wastewater Treatment

Agrahari,

Kumar

2023

ChemBioEng Reviews

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Dairy processing industries have emerged as the most swiftly evolving sectors with excessive wastewater generation containing proteins, fat, oils, greases (FOGs), etc. As there is rising strain on energy usage and dependence on water resources, sustainable research focuses on reduction in wastewater generation and developing value‐added goods. An effective and widely explored sustainable technique for treating wastewater is phytoremediation, a plant‐based process. This review aims to analyze phytoremediation as a sustainable alternative for dairy wastewater treatment. It initially briefs about dairy wastewater characteristics and treatment alternatives and discusses constructed wetlands and hydroponic system in detail with mechanism insights and influenced process parameters. Interconnected technologies with phytoremediation and their impact on contaminant transformations, nutrient reuse, and detoxification of pollutants are encompassed. Also, resource recovery and biomass utilization, feedstock enrichment along with the future prospects of integrated hydroponic systems for achieving sustainability with efficient resource recovery are featured.

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Aquatic biomass as sustainable feedstock for biorefineries

Kotamraju

Lens

2023

Biofuels Bioprod Bioref

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The development of biorefineries is a crucial step in the circular economy framework. In biorefineries, research is intensified towards utilizing feedstocks, which do not need arable land or compete with food sources. In this scenario, emerged, submerged and free-floating aquatic plants are garnering significant attention as potential feedstocks owing to their generation in huge quantities, especially in eutrophic water bodies, similar composition to lignocellulosic biomass with lower lignin content and requirement for only mild pre-treatments. Therefore, exploring the feasibility of using these aquatic plants for the production of various biocommodities in a biorefinery approach can be of prime importance. In light of this, the current review illustrates the use of some of the major aquatic plants for the production of different biocommodities. The main focus of the study is to shed light on the various biorefinery schemes that could be implemented using these aquatic plants. It also outlines the challenges and prospects of aquatic plant-based biorefineries. The findings suggest that various biorefinery schemes can be implemented using these aquatic plants and a combination of chemical and biological processes could aid in lowering the cost and achieving better yields. Furthermore, it is also observed that research on large-scale management and valorization of these aquatic plants also needs to be intensified.

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Duckweed biorefinery – Potential to remediate dairy wastewater in integration with microbial protein production

Cited by 14 publications

References 42 publications

Characterization of the physico-chemical properties of the natural habitat and in vitro culture effects on the biochemistry, proliferation and morphology of Lemna minuta

Characterization of the physico-chemical properties of the natural habitat and in vitro culture effects on the biochemistry, proliferation and morphology of Lemna minuta

Phytoremediation: A Shift Towards Sustainability for Dairy Wastewater Treatment

Aquatic biomass as sustainable feedstock for biorefineries

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