Journal
BIORESOURCE TECHNOLOGY
Volume 248, Issue -, Pages 120-126Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.06.079
Keywords
Algal-bacterial processes; Biomass production; Heavy metal removal; Microalgae dynamics; Piggery wastewater treatment
Funding
- INIA
- European FEDER program [RTA2013-00056-C03-02]
- Regional Government of Castilla y Leon [VA024U14, UIC 71]
- MINECO (Red Novedar)
- EU program ERASMUS MUNDUS EURICA
- Universidad Nacional Autonoma de Nicaragua (UNAN-Managua)
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The dynamics of microalgae population during piggery wastewater (PWW) treatment in four open photobioreactors operated at 27 days of hydraulic retention time, and inoculated with Chlorella sp. (R1), Acutodesmus obliquus (R2), Oscillatoria sp. (R3) and in the absence of inoculum (R4), were evaluated for 6 months. In addition, the algal-bacterial biomass concentration, removal of organic matter, nutrients and heavy metals were also assessed. The results revealed a high diversity and rapid variations in the structure of microalgae populations, Chlorella sp. being dominant in R4 throughout most of the operational period. Steady state average biomass concentration ranged from 2445-2610 mg/L in R1-R3 to 3265 mg/L in R4. No significant differences were recorded in the removal efficiencies (REs) of total organic carbon (86-87%), inorganic carbon (62-71%), total nitrogen (82-85%) and total phosphorous (90-92%). Finally, Zn-REs accounted for 26% in R3, 37% in R2, and 49% in R1 and R4. (C) 2017 Elsevier Ltd. All rights reserved.
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