IMPACT OF CLEANING AND DISINFECTING AGENTS ON BIOLOGICAL TREATMENT PROCESSES
Abstract:Food and beverage processing industries frequently use chemical agents to clean and disinfect production equipment, storage vats, packaging lines, and cooking units either during the manufacturing process or at daily or weekly intervals. Wastewaters produced by these operations typically are discharged to an industrial treatment plant or a local treatment works. Problems occur infrequently when the chemical agents are used sparingly and are discharged to the treatment works at continuous but low concentrations. However, for CIP and weekly cleaning/disinfecting operations, large amounts of chemical agents can be discharged at one time. The resulting slug dose can interfere with the normal performance of the treatment plant and cause violations of discharge permits for COD, BOD, ammonia, or phosphorus. In extreme cases, process failure can occur. Tests were conducted with anaerobic and aerobic processes using a number of commercial cleaning/disinfecting agents. These tests indicated that commercial formulations containing quaternary ammonium compounds and alkylamines were most likely to cause toxic impacts. Threshold toxic concentrations ranged from 100 to 200 mg/L as the commercial formulation or 5 to 10 mg/L when based on the active ingredient.
Document Type: Research Article
Publication date: January 1, 2001
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