Application of Nordic microalgal-bacterial consortia for nutrient removal from wastewater

The Circular Economy Approach to Improving CNP Ratio in Inland Fishery Wastewater for Increasing Algal Biomass Production

“…Therefore, this type of wastewater does not possess high nutrients for algal production. The different studies listed in Table 4 show similar levels of NO 3 and PO 4 removal, which implies that the different strains studied are capable of consuming those nutrients; however, unless the wastewater comes from recirculating aquaculture systems (RASs), such as the work of Dourou et al [10], is supplemented with pulp wastewater [34], is enriched with biogas digestate [41], or is even enriched with a culture medium [37], this type of wastewater is not able to sustain large concentrations of algal biomass. Lastly, the protein content in those strains ranges between 24% and 60% (w/w), which makes them an exciting source for fish feed.…”

“…[38], Tetraselmis sp. [13,18,23,33,34,39], algal-bacterial biofilm [40], and mixed consortia of algal strains [41] for the removal of nutrients from fishery wastewater has been tested at a laboratory (<50 L) and demonstration scale (>200 L) in countries such as Belgium [5,42], China [16], Colombia [43,44], Denmark [41], Spain [15,45], South Africa [22,46], and Poland [19]. One interesting fact from those studies is that most authors worked with wastewater from RAS systems.…”

Circular Bio-economy—Paradigm for the Future: Systematic Review of Scientific Journal Publications from 2015 to 2021

“…Longhurst et al (2019) [131] have done exactly that in a UK case study and have concluded that these bio-fertilisers pose negligible risks to human, animal, environmental and crop receptors, when the appropriate stipulated risk management controls are adhered to. Ferreira et al (2018 [37,38] experimented with the algal-bacterial treatment of different types of wastewater streams-swine, cattle, poultry, dairy, brewery and urban-to grow microalgae which was subsequently dark-fermented to yield bioproducts, while Wicker et al (2020) [39] treated nutrient-rich liquid digestate with a microalgal-bacterial consortia to accomplish the triple objectives of wastewater treatment, nutrient recovery for reuse in agriculture and cultivation of biomass to be put to multiple uses [40]. Waste streams with higher nutrient concentrations resulted in a marked improvement in the microalgal productivity [37,38,41].…”

Emergent green technologies for cost-effective valorization of microalgal biomass to renewable fuel products under a biorefinery scheme

“…Employing this concept in a closed bioreactor (Fig. 2), Wicker and Bhatnagar [65] achieved a 33% increase in total biomass harvested as compared to conventional liquid cultivation, using mixed consortia with both free-living and filamentous species. By coupling cultivation of easily-harvested filamentous microalgae with emergent ecofriendly harvest techniques for cells in suspension, energy costs could be significantly reduced, and biomass yields enhanced.…”