Nitrification of waste waters from fish-meal factories

Abstract

3 July 1998246 Materials and methods Analytical methods TSS, VSS, pH and TKN were measured as proposed by Standard Methods (1985). The sludge volume index (SVI) was measured using a 50 m l graduate cylinder instead of a 1 las proposed by Standard Methods (1985). Nitrate, nitrite, ammonia and oxygen were determined by using specific electrodes (Standard Methods, 1985). All the parameters, including flow rate, were measured daily, except the SVI which was determined 3 times per week. 1). A stirrer was used to guarantee sludge suspension. Aeration and additional mixing were provided by a membrane compressor.

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