Nutrient and pathogen removal from anaerobically treated black water by microalgae

Slompo, Nathalie Dyane Miranda; Quartaroli, Larissa; Fernandes, Tânia V.; Silva, Gustavo Henrique Ribeiro da; Daniel, Luiz Antônio

doi:10.1016/j.jenvman.2020.110693

Cited by 45 publications

(19 citation statements)

References 47 publications

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“…The current study shows that the tested pathogen groups were reduced until below safety norms for feed production (EU directive 183/2005/EC) after 22 days of C. sorokiniana growth on 50% diluted wastewater (diluted with tap water). A similar reduction in pathogen abundance was shown for C. sorokiniana cultures on anaerobically treated black water, with a removal efficiency of 69% for total coliforms and 100% for E. coli (Slompo et al, 2020). In undiluted poultry wastewater, pathogen-dependent increases or decreases were observed by the end of the cultivation period.…”

Section: Wastewater-derived Algal Biomass As Feedstock For Animal Feedsupporting

confidence: 68%

“…Although also other strains were tolerant to wastewater culturing (see Pre-Screening the Growth Potential of Microalgal Strains), C. sorokiniana reached the highest optical density in wastewater conditions at the end of the growing period compared to the other strains. Moreover, C. sorokiniana is easy to cultivate and is widely used for diverse feedstock production, and was therefore selected as an attractive species for cultivation on wastewater (Ievina and Romagnoli, 2020;Slompo et al, 2020).…”

Section: Chlorella Sorokiniana Growth On Poultry Wastewatermentioning

confidence: 99%

“…In undiluted poultry wastewater, pathogen-dependent increases or decreases were observed by the end of the cultivation period. While our understanding of the interactions between pathogens and microalgae is still very limited, underlying mechanisms could include differences in nutrient competitiveness, different sensitivities to dissolved oxygen and pH changes, and the potential production of antibacterial metabolites (Slompo et al, 2020).…”

Section: Wastewater-derived Algal Biomass As Feedstock For Animal Feedmentioning

confidence: 99%

“…In contrast, many wastewaters are enriched with various macro-and micronutrients that are essential for microalgal growth, including carbon, nitrogen, phosphorus and various trace minerals (Alcántara et al, 2015;Guldhe et al, 2017;Wang et al, 2018). While excess nutrients in wastewater are often lost to the environment (Larsen et al, 2016;Slompo et al, 2020), recovering resources from wastewater may reduce the water footprint and operating costs of algae cultivation (Guldhe et al, 2017;Nagarajan et al, 2020). This, combined with the versatility of microalgae to grow under various conditions (Metting, 1996;Nagarajan et al, 2020), offers an interesting revenue stream to produce renewable, biological feedstock from waste.…”

Section: Introductionmentioning

confidence: 99%

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Waste Is the New Wealth – Recovering Resources From Poultry Wastewater for Multifunctional Microalgae Feedstock

Thoré

Schoeters

Cuyper

et al. 2021

Front. Environ. Sci.

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To meet the increasing demands of the growing population and to cope with the challenges of global change, both the production of biological feedstock and the recovery of recyclable natural resources play a critical role. Microalgal biomass is a promising source of renewable multifunctional feedstock, but the production is costly and requires large amounts of water. Here, we explored the potential of using wastewater as culture medium to lower the economic and environmental costs of microalgae biomass production and evaluated its valorization opportunities for animal feed production. As a proof of principle, we show that Chlorella sorokiniana can be cultivated on poultry wastewater, with a 83 and 113% increase in productivity when wastewater was first 50% diluted with tap water or standard growth medium, respectively. Wastewater sterilization before use enhanced algal growth with 36–118%, but only when wastewater was 25–50% diluted with standard medium. In contrast, it offered no additional benefits when dilutions were made with tap water or when wastewater was not diluted. At the end of the 22-days experiment, a maximum biomass of 0.8–1.9 g L−1 was reached for algae grown on wastewater. The produced biomass had a high macronutrient content, and the heavy metal content was below maximum limits for use in animal feed. Likewise, the tested pathogen groups were reduced until below safety norms for feed production after algal growth in unsterilized 50% wastewater (diluted with tap water). Overall, these findings add to our growing knowledge on the cultivation of microalgae on wastewater and its valorization opportunities, paving the way for a more sustainable use and reuse of resources.

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Section: Wastewater-derived Algal Biomass As Feedstock For Animal Feedsupporting

confidence: 68%

Section: Chlorella Sorokiniana Growth On Poultry Wastewatermentioning

confidence: 99%

Section: Wastewater-derived Algal Biomass As Feedstock For Animal Feedmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Waste Is the New Wealth – Recovering Resources From Poultry Wastewater for Multifunctional Microalgae Feedstock

Thoré

Schoeters

Cuyper

et al. 2021

Front. Environ. Sci.

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“…Total nitrogen (TN), total phosphorus (TP), total chemical oxygen demand (CODtotal), total suspended solids (TSS), volatile suspended solids (VSS), dissolved oxygen (DO) and alkalinity were all measured according to standard methods [ 16 ] at the chemical laboratory of the Netherlands Institute of Ecology, Wageningen, The Netherlands.…”

Section: Methodsmentioning

confidence: 99%

On-Site Blackwater Treatment Fosters Microbial Groups and Functions to Efficiently and Robustly Recover Carbon and Nutrients

et al. 2020

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Wastewater is considered a renewable resource water and energy. An advantage of decentralized sanitation systems is the separation of the blackwater (BW) stream, contaminated with human pathogens, from the remaining household water. However, the composition and functions of the microbial community in BW are not known. In this study, we used shotgun metagenomics to assess the dynamics of microbial community structure and function throughout a new BW anaerobic digestion system installed at The Netherlands Institute of Ecology. Samples from the influent (BW), primary effluent (anaerobic digested BW), sludge and final effluent of the pilot upflow anaerobic sludge blanket (UASB) reactor and microalgae pilot tubular photobioreactor (PBR) were analyzed. Our results showed a decrease in microbial richness and diversity followed by a decrease in functional complexity and co-occurrence along the different modules of the bioreactor. The microbial diversity and function decrease were reflected both changes in substrate composition and wash conditions. Our wastewater treatment system also decreased microbial functions related to pathogenesis. In summary, the new sanitation system studied here fosters microbial groups and functions that allow the system to efficiently and robustly recover carbon and nutrients while reducing pathogenic groups, ultimately generating a final effluent safe for discharge and reuse.

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Microalgae Production Integrated with the Wastewater Treatment: A Management Approach

Leite¹,

Daniel²

2022

The Handbook of Environmental Chemistry

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Nutrient and pathogen removal from anaerobically treated black water by microalgae

Cited by 45 publications

References 47 publications

Waste Is the New Wealth – Recovering Resources From Poultry Wastewater for Multifunctional Microalgae Feedstock

Waste Is the New Wealth – Recovering Resources From Poultry Wastewater for Multifunctional Microalgae Feedstock

On-Site Blackwater Treatment Fosters Microbial Groups and Functions to Efficiently and Robustly Recover Carbon and Nutrients

Microalgae Production Integrated with the Wastewater Treatment: A Management Approach

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