Bioremediation of synthetic intensive aquaculture wastewater by a novel feed-grade composite biofilm

Barnharst, Tanner; Rajendran, A.; Hu, Bo

doi:10.1016/j.ibiod.2017.10.007

Cited by 44 publications

(21 citation statements)

References 41 publications

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“…Effluents can be directly valorised by growing primary producers (Milhazes-Cunha and Otero, 2017;Wei et al, 2017;Li et al, 2019). Sludges and effluents from aquaculture activities may also be bioremediated by decomposers, detritivores, and biofilms, whose biomass in turn presents a useful resource for feed production (Martinez-Porchas et al, 2014;Barnharst et al, 2018;Gómez et al, 2019;Robinson et al, 2019). Solid wastes are an appropriate feed for polychaetes, which provide protein and important fatty acids as feed for fish, shrimp, or crab production, reducing or eliminating the need for manufactured feed based on farmed crops or fish meal (Brown et al, 2011;Alava et al, 2017;Pajand et al, 2017).…”

Section: Sustainable Feed Managementmentioning

confidence: 99%

Towards Environmental Sustainability in Marine Finfish Aquaculture

et al. 2021

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Aquaculture is one of the fastest growing food production sectors and has great potential for food security and livelihoods. However, it generates concerning consequences for the environment, including chemical and biological pollution, disease outbreaks, unsustainable feeds and competition for coastal space. Recent investigations are focusing on sustainable techniques (e.g., polyculture, offshore facilities) to improve the relationship between the industry, environment and society. This review provides an overview of the main factors of ecological concern within marine finfish aquaculture, their interactions with the environment, and highlights sustainable alternatives that are currently in use or development. Adequate environmental monitoring and location of farms, the reduction and exploitation of wastes and chemicals being used is crucial to ensure the growth and continuity of aquaculture production.

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Section: Sustainable Feed Managementmentioning

confidence: 99%

Towards Environmental Sustainability in Marine Finfish Aquaculture

et al. 2021

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“…Considering the multiple objectives described in the literature with the data presented herein, diverse authors describe the harvest efficiency and the composition of the consortium biomass as a determining factor for their purposes. For instance, Barnharst et al [18] verified the application of artificial lichens using C. vulgaris and Mucor indicus in intensive aquaculture bioremediation process, observed a reduction in phosphate and total ammonia to undetectable limits, while axenic cultures were suitable for target removal of solely nitrogen or phosphorus. Rajendran et al [22] verified the effectiveness of lichens between C. vulgaris and M. circinelloides by employing a polypropylene and cotton yarn in the ethanol co-products industry, in which the high concentration of P (818 mg•L −1 ) and N (924 mg•L −1 ) nutrients in the samples were recovered in the microalgae biomass by 55.7% and 74%, respectively, with a COD reduction in up to 65.6%.…”

Section: Other Strategies Involving the Use Of Mature Fungal Myceliummentioning

confidence: 99%

Consortium Growth of Filamentous Fungi and Microalgae: Evaluation of Different Cultivation Strategies to Optimize Cell Harvesting and Lipid Accumulation

et al. 2020

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This study aims to evaluate the potential of consortium biomass formation between Mucor circinelloides, an oleaginous filamentous fungal species, and Chlorella vulgaris, in order to promote a straightforward approach to harvest microalgal cells and to evaluate the lipid production in the consortium system. A synthetic medium with glucose (2 g·L−1) and mineral nutrients essential for both fungi and algae was selected. Four different inoculation strategies were assessed, considering the effect of simultaneous vs. separate development of fungal spores and algae cells, and the presence of a supporting matrix aiming at the higher recovery of algae cell rates. The results were evaluated in terms of consortium biomass composition, demonstrating that the strategy using a mature fungal mycelium with a higher algae count may provide biomass samples with up to 79% of their dry weight as algae, still promoting recovery rates greater than 97%. The findings demonstrate a synergistic effect on the lipid accumulation by the fungal strain, at around a fourfold increase when compared to the axenic control, with values in the range of 23% of dry biomass weight. Furthermore, the fatty acid profile from the samples presents a balance between saturated and unsaturated fatty acids that is likely to present an adequate balance for applications such as biodiesel production.

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“…in combination with effective microorganism (EM) have also indicated capability of treating Lates calcifer aquaculture wastewater for recycling (Lananan et al 2014). Mycoalgae biofilm formed by combination of Mucor indicus and C. vulgaris on polymer matrix surface, converts excess nitrogen and phosphorus into microalgal biomass for fish consumption and at the same time purifying the aquaculture water for recirculation (Barnharst et al 2018). Chlorella vulgaris used in aquaculture reduces the concentrations of phosphorus and total nitrogen, and therefore the microalga could be used to minimise the pollution levels in aquaculture wastewater (Blanco-Carvajal et al 2017;Blanco-carvajal & S anchez 2018).…”

Section: Bioremediation Of Aquatic Environmentmentioning

confidence: 99%

Applications of microalga Chlorella vulgaris in aquaculture

Ahmad

Shariff

Yusoff

et al. 2018

Reviews in Aquaculture

177

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Microalgae biomass is used in aquaculture as feed, growth enhancers and immunostimulants. Chlorella vulgaris is an important species with a good biomolecular composition. Commercially, it is one of the most commonly used microalga in aquaculture. Several studies confirmed its ability to improve nutrition, immunity, aquatic bioremediation, amelioration of stress, disease resistance of fish and inhibits bacterial quorum sensing when used appropriately. Despite claims of its benefits, C. vulgaris is reported to have unfavourable effects when incorporated in diets at higher inclusion levels. In addition, its rigid cell wall might restrict the access of digestive enzymes to the intracellular components for proper digestion and assimilation. Thus, this review discusses the role of C. vulgaris and its importance in aquaculture with emphasis on its environmental requirements, morphology, pigments, digestibility, dynamics on growth performance, antibacterial activity, bacterial quorum sensing, immunomodulatory effect, anti‐stress effect, gut microbiome, aquatic bioremediation and its safety as food or feed.

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Bioremediation of synthetic intensive aquaculture wastewater by a novel feed-grade composite biofilm

Cited by 44 publications

References 41 publications

Towards Environmental Sustainability in Marine Finfish Aquaculture

Towards Environmental Sustainability in Marine Finfish Aquaculture

Consortium Growth of Filamentous Fungi and Microalgae: Evaluation of Different Cultivation Strategies to Optimize Cell Harvesting and Lipid Accumulation

Applications of microalga Chlorella vulgaris in aquaculture

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