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Inhibition of nitrification by ammonia and nitrous acid

Inhibition of nitrification by ammonia and nitrous acid

Journal Water Pollution Control Federation 48(5): 835-852

Inhibition of nitrification by un-ionized ammonia (NH3) [free ammonia (FA)] and un-ionized nitrous acid (HNO2) [free nitrous acid (FNA)] was evaluated by using data from studies of municipal, agricultural and industrial wastes. Inhibitory concentrations of FA and FNA were identified and ranged from 0.1-150 mg/l for FA and 0.2-2.8 mg/l for FNA. FA inhibition to Nitrobacter occurred at concentrations lower than those that inhibited Nitrosomonas. The inhibition was not permanent and could be relieved by adjusting operational conditions such that the FA and FNA were less than inhibitory concentrations. An operational chart was developed to assess the performance of nitrifying systems.

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Accession: 005705570

Download citation: RISBibTeXText

PMID: 948105

DOI: 10.2307/25038971

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