SODIUM INHIBITION IN THE ANAEROBIC-DIGESTION PROCESS - ANTAGONISM AND ADAPTATION PHENOMENA

被引:217
作者
FEIJOO, G
SOTO, M
MENDEZ, R
LEMA, JM
机构
[1] UNIV SANTIAGO DE COMPOSTELA, DEPT CHEM ENGN, E-15706 GALIZA, SPAIN
[2] UNIV A CORUNA, DEPT FUNDAMENTAL & IND CHEM, GALIZA, SPAIN
关键词
D O I
10.1016/0141-0229(94)00011-F
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
The effect of sodium on the methanization of volatile fatty acid (VFA) mixtures was evaluated for three different sludges. Sodium concentrations causing 50% inhibition ranged from 3 to 16 g l(-1) in the absence of nutrients or other salts, showing a higher tolerance to sodium in the sludges obtained from the digesters treating high saline wastewaters. This fact is considered to be a consequence of sludge adaptation to sodium. Furthermore, the adaptation of methanogenic bacteria to sodium was also found during the batch assays: After 40 days of digestion, two different sludges (subjected to 6.9 and 21.5 g Na+ l(-1), respectively) increased the relative methanogenic activity from 0% to about 45% of the blank activity. The antagonism phenomena, due to the presence of cations and anions contained in the assayed media, greatly influenced the sodium effect on anaerobic sludges. Sodium concentrations causing 50% inhibition may be increased by 4 to 10 g l(-1) or more when sea water is used instead of NaCl. Nutrients also influence the sodium toxicity. The effect of sodium in each step of the anaerobic digestion process appears to be different depending on the sludge. For an adapted sludge, sodium caused 50% inhibition of propionic, acetic, and n-butyric utilizers at concentrations of 10.5, 17, and 19 g l(-1), respectively, an indication that propionic utilizers had less adaptation potential. These concentrations ranged between 5 and 6 g l(-1) for an unadapted sludge. The methanization of a more complex substance, such as glucose, was less extensively affected than the methanization of VFA. Results from continuous assays agree with those obtained from batch assays.
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页码:180 / 188
页数:9
相关论文
共 21 条
[1]  
Soto, Mendez, Lema, Efluentes residuales en la industria de procesado de productos marinos. Caracterización, gestión de efluentes y alternativas de tratamiento, Ingeniería Química, 22, pp. 203-209, (1990)
[2]  
Kugelman, McCarty, Cation toxicity and stimulation in anaerobic waste treatment, J. WPCF, 37, pp. 97-116, (1965)
[3]  
Rinzema, van Lier, Lettinga, Sodium inhibition of acetoclastic methanogens in granular sludge from a UASB reactor, Enzyme and Microbial Technology, 10, pp. 101-109, (1988)
[4]  
Gourdon, Comel, Vermande, Verom, Kinetics of acetate, propionate and butyrate removal in the treatment of a semi-synthetic landfill leachate on anaerobic filter, Biotechnol. Bioeng., 33, pp. 1167-1181, (1989)
[5]  
Lema, Soto, Veiga, Mendez, Mesophilic and thermophilic anaerobic treatment of wastewaters from industrial processing of mussel, Biomass for Energy and Industry, pp. 872-877, (1988)
[6]  
Balsleve-Olesen, Lynggaard-Jensen, Nickelsen, Pilot-scale experiments on anaerobic treatment of wastewater from a fish processing plant, Water Sci. Tech., 22, pp. 463-474, (1990)
[7]  
Mendez, Omil, Soto, Lema, Pilot plant studies on the anaerobic treatment of different wastewaters from a fish-canning factory, Water Sci. Tech., 25, pp. 37-44, (1992)
[8]  
Soto, Mendez, Lema, Sodium inhibition and sulphate reduction in the anaerobic treatment of mussel processing wastewaters, J. Chem. Technol. Biotechnol., 58, pp. 1-7, (1993)
[9]  
Soto, Mendez, Lema, Characterization and comparison of biomass from mesophilic and thermophilic fixed bed anaerobic digesters, Water Sci. Tech., 25, pp. 203-212, (1992)
[10]  
Soto, Mendez, Lema, Methanogenic and non-methanogenic activity tests: Theoretical basis and experimental set up, Water Res., 27, pp. 1361-1376, (1993)