Anaerobic digestion of winery effluents derived from two different wine making processes was compared in a laboratory scale upflow filter. White winery effluents (WWE) were more easily degradable (average soluble COD removal=92%) than red winery effluents (RWE) (average soluble COD removal = 85%). Differences in the reactor microbial populations for the two effluents were also observed. Both aceticlastic and hydrogenotrophic methanogens in the circulating fractions were significantly higher during the treatment of WWE than during that of RWE. With both wastewaters, the reactor promptly reacted to volumetric organic load (Bv) stress (tripling from 4 to 12 g COD L-1 d(-1)). Following the By perturbation, COD removal decreased to 50%. However, after two weeks the COD removal values were as before perturbation. Volatile fatty acids, especially total VFAs and butyrate measured on the second day after the imposed By perturbation, were good indicators of process imbalance. Coenzyme F-420 determination and scanning electron microscopy revealed the presence of Methanosaeta like cells embedded to extracellular polymers in a uniform slime matrix in the biofilm. The main methanogens observed in the effluents were Methanosarcina and Methanobrevibacter cells.
Anaerobic digestion of winery wastewaters derived from different wine making processes / D. Daffonchio, M. Colombo, G. Origgi, C. Sorlini, V. Andreoni. - In: JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING. - ISSN 1093-4529. - 33:8(1998), pp. 1753-1770.
Anaerobic digestion of winery wastewaters derived from different wine making processes
D. DaffonchioPrimo
;M. ColomboSecondo
;C. SorliniPenultimo
;V. AndreoniUltimo
1998
Abstract
Anaerobic digestion of winery effluents derived from two different wine making processes was compared in a laboratory scale upflow filter. White winery effluents (WWE) were more easily degradable (average soluble COD removal=92%) than red winery effluents (RWE) (average soluble COD removal = 85%). Differences in the reactor microbial populations for the two effluents were also observed. Both aceticlastic and hydrogenotrophic methanogens in the circulating fractions were significantly higher during the treatment of WWE than during that of RWE. With both wastewaters, the reactor promptly reacted to volumetric organic load (Bv) stress (tripling from 4 to 12 g COD L-1 d(-1)). Following the By perturbation, COD removal decreased to 50%. However, after two weeks the COD removal values were as before perturbation. Volatile fatty acids, especially total VFAs and butyrate measured on the second day after the imposed By perturbation, were good indicators of process imbalance. Coenzyme F-420 determination and scanning electron microscopy revealed the presence of Methanosaeta like cells embedded to extracellular polymers in a uniform slime matrix in the biofilm. The main methanogens observed in the effluents were Methanosarcina and Methanobrevibacter cells.Pubblicazioni consigliate
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