Cited by 142Algal biology and biofuel productionWastewater Treatment and Nitrogen RemovalConstructed Wetlands for Wastewater Treatment

Microalgae-based processes for the biodegradation of pretreated piggery wastewaters

González, Cristina, Marciniak, Judith, Villaverde, Santiago, García-Encina, Pedro A., Muñoz, Raúl·2008·Applied Microbiology and Biotechnology

Abstract

The potential and limitations of photosynthetic oxygenation on carbon and nitrogen removal from swine slurry were investigated in batch experiments using Chlorella sorokiniana and an acclimated activated sludge as model microorganisms. While algal-bacterial systems exhibited similar performance than aerated activated sludge in tests supplied with four and eight times diluted slurry, a severe inhibition of the biodegradation process was recorded in undiluted and two times diluted wastewater. Daily pH adjustment to 7 in enclosed algal-bacterial tests at several swine slurry dilutions allowed the treatment of up to two times diluted slurries (containing up to 1,180 mg N-NH(4)(+) l(-1)). The combination of high pH levels and high NH(4)(+) concentrations was thus identified as the main inhibitory factor governing the efficiency of photosynthetically oxygenated processes treating swine slurry. Measurements of soluble total organic carbon (TOC) and volatile fatty acids (VFA) present in the slurry suggested that VFA degradation (mainly acetic and propionic acid) accounted for most of the soluble TOC removal, especially during the initial stages of the biodegradation process. On the other hand, assimilation into biomass and nitrification to NO(2)(-) constituted the main NH(4)(+) removal processes in enclosed algal-bacterial systems.

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Crossref · 10.1007/s00253-008-1571-6

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Authors
González, C., Marciniak, J., Villaverde, S., García-Encina, P. A., & Muñoz, R.
Affiliations
Universidad de Valladolid (ES)
Corresponding author
Muñoz, Raúl
Venue
Applied Microbiology and Biotechnology
Published
2008-10
Volume
80
Issue
5
Pages
891-898
ISSN
  • 0175-7598 (ISSN-L)
  • 1432-0614
OpenAlex
W2092063479
Cited by
142
References
21
Citations by year
2026: 2 · 2025: 2 · 2024: 2 · 2023: 6 · 2022: 8 · 2021: 8 · 2020: 7 · 2019: 7 · 2018: 9 · 2017: 15 · 2016: 13 · 2015: 14 · 2014: 8 · 2013: 7 · 2012: 7
FWCI
5.11
Type
journal article
Language
en
Open access
closed
Locations
  • Applied Microbiology and Biotechnology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Algal biology and biofuel production
  • Physical Sciences › Environmental Science › Pollution › Wastewater Treatment and Nitrogen Removal
  • Physical Sciences › Environmental Science › Waste Management and Disposal › Constructed Wetlands for Wastewater Treatment
Keywords
pig slurry, swine wastewater, microalgae, Chlorella sorokiniana, biodegradation inhibition, pH, ammonium removal, volatile fatty acids, total organic carbon removal, nitrification, activated sludge
MeSH terms
Chlorophyta, Animals, Bacteria, Biodegradation, Environmental, Industrial Waste, Sewage, Swine

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