Microalgae-based processes for the biodegradation of pretreated piggery wastewaters

Applied Microbiology and Biotechnology
Cristina GonzálezRaul Muñoz

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 nitrificatio...Continue Reading

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Citations

Feb 3, 2011·Applied Microbiology and Biotechnology·Cristina González-FernándezMaria Cruz García-González
Feb 2, 2013·Applied Microbiology and Biotechnology·C GómezF G Acién
Apr 25, 2012·Environmental Science and Pollution Research International·G SekaranA B Mandal
Jun 23, 2010·Applied Biochemistry and Biotechnology·Liang WangRoger Ruan
Jan 6, 2009·Applied Microbiology and Biotechnology·Ignacio de GodosRaúl Muñoz
Nov 18, 2015·Applied Microbiology and Biotechnology·Joshua LowreyMarianne S Brooks
Dec 29, 2012·Journal of Environmental Management·Reda A I Abou-ShanabByong-Hun Jeon
Jul 9, 2010·Journal of Environmental Sciences (China)·Yiming ShiJun Lu
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Jul 16, 2010·Biotechnology and Bioengineering·Okkyoung ChoiZhiqiang Hu
Jun 4, 2015·Applied Microbiology and Biotechnology·C Gómez-SerranoE Molina-Grima
Aug 2, 2011·Biotechnology Advances·Suresh R SubashchandraboseRavi Naidu
Oct 11, 2011·Bioresource Technology·B RiañoM C García-González
Oct 14, 2016·Environmental Science and Pollution Research International·P Maza-MárquezJ González-López
Aug 14, 2018·Water Science and Technology : a Journal of the International Association on Water Pollution Research·P CarminatiE Ficara
Jun 27, 2015·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Cynthia AlcántaraRaúl Muñoz
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Jul 13, 2019·Bioresource Technology·Dillirani NagarajanJo-Shu Chang
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Jun 12, 2021·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Chunye XueXiangyuan Deng

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