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Inhibition of nickel to the anaerobic digestion



Inhibition of nickel to the anaerobic digestion



Huanjing Kexue 14(6): 5-7, 93



The inhibition of nickel ion to anaerobic digestion was described in this paper. Nickel ion was added at different concentrations in three experimental digesters. No inhibition effect on the anaerobic system was observed when daily addition of nickel to the digester was less than 36. 4 mg/L. When the daily addition of nickel was 40-60mg/L, or more than 80mg/L, however, digestion system was inhibited significantly or seriously, respectively. Toxicity of nickel to anaerobic system was found to be dependent on the concentration of dissolved nickel ions in digester. The system was not affected when the concentration of dissolved nickel ion is less than 2.5mg/L. At the ratio of concentration of daily nickel addition to activated sludge (dry weight) being less than 0.08 (w/w), the digestion system would be normally running.

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Accession: 009884240

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