Abstract:
Cultivating microalgae and cyanobacteria using city wastewater as low-cost growth media offers a three-in-one set of advantages including pollutant removal, mitigation of atmospheric carbon, and subsequent utilization of the biomass to produce biofuels and other high-value bioproducts. The present study was focused on employing microalgae/cyanobacteria for multiproduct algal biorefinery using city wastewater as low-cost growth media. Several algal/cyanobacterial strains including Pseudoscillatoria coraliiBERC01, Chlamydomonas sp. BERC09, Bracteacoccus sp. Acaryochloris sp. BERC03, Pleurocapsa sp. BERC04, Oscillatoriasp. BERC06, Chlamydomonas sp. BERC07, and Haematococcus sp. BERC09, and Plectonema terebrans BERC10 were characterized for their potential for wastewater cultivation, atmospheric carbon mitigation, and production of biofuels and high-value industrial products. All strains exhibited excellent wastewater cultivation and pollutant removal potential and respectively produced 1.9 g L-1-2.23 gL-1 with 3.54-4.2 gL-1 of CO2 fixation ability, along with 100% removal of suspended solids, 50-100% removal of total nitrogen and phosphorus. Moreover, wastewater cultivation improved biomass and lipid production without having any negative impact on the biodiesel composition. Furthermore, 62.9-300 mgg-1 of phycobilins were produced by these strains. Besides, each step starting from cultivation, harvesting to biomass processing was studied to improve cost-effectiveness via establishing a cascading biorefinery in a circular biorefinery paradigm. The data demonstrated suitability of urban wastewater for enhanced biomass production while keeping the energy-water-environment nexus sustainable.
Page(s):
8-8
DOI:
DOI not available
Published:
Journal: Abstract Book on Second International Conference on Recent Approaches in Plant Sciences (RAPS-23) 4-5 May 2023 , Volume: 0, Issue: 0, Year: 2023
Keywords:
microalgae and cyanobacteria
,
urban wastewater
,
circular bioeconomy
,
multiproduct cascading biorefinery
,
lowcost cultivation