Journal
BIORESOURCE TECHNOLOGY
Volume 245, Issue -, Pages 483-490Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.08.135
Keywords
Algal-bacterial processes; Heavy metal biosorption; Microalgae-bacteria dynamics; Nutrient removal; Piggery wastewater biodegradation
Funding
- INIA
- FEDER EU 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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This work evaluated the performance of four open algal-bacterial photobioreactors operated at approximate to 26 days of hydraulic retention time during the treatment of 10 (x10) and 20 (x20) times diluted piggery wastewater (PWW) under indoor (I) and outdoor (O) conditions for four months. The removal efficiencies (REs) of organic matter, nutrients and zinc from PWW, along with the dynamics of biomass concentration and structure of algal-bacterial population were assessed. The highest TOC-RE, TP-RE and Zn-RE (94 +/- 1%, 100% and 83 +/- 2%, respectively) were achieved indoors in x10 PWW, while the highest TN-RE (72 +/- 8%) was recorded outdoors in x10 PWW. Chlorella vulgaris was the dominant species regardless of the ambient conditions and PWW dilution. Finally, DGGE-sequencing of the bacterial community revealed the occurrence of four phyla, Proteobacteria being the dominant phylum with 15 out of the 23 most intense bands.
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