a mixture of nh 4 br naocl is more effective than other oxidizing and non oxidizing biocides in a high demand medium kinetics of kill of various mixtures of ammonium salts mixed with naocl in water from a citrus juice evaporator demand higher than 30 ppm out of 30 ppm of cl 2 during 10 minutes results in table v show that mixtures of ammonium salts and naocl are effective in controlling aerobic and anaerobic microorganisms in water with high demand for chlorine control was achieved within 10 minutes under these conditions both naocl and naobr are impaired by the media the mixture of nh 4 br naocl did not leave a measurable residue after 10 minutes yet it was very effective in reducing viable count within 10 minutes efficacy of oxidizing biocides in water taken from paper mill thick stock of pulp slurry microorganisms were incubated at 37 u00b0 c total aerobic viable counts concentration of stock solution 0 1 as cl 2 results in table vi prove higher efficacy for nh 4 br naocl as compared to other oxidizing biocides in this heavily loaded water efficacy of a series of biocides in domestic waste containing a high concentration of amines results in table vii.