Abstract

The causes for erratic BOD results from wastewaters containing elevated concentrations of salt were investigated. Standard organic solutions and an industrial waste were tested with sewage seed and known species of salt tolerant bacteria using standard and hypersaline dilution water at three salt concentrations. Significant BOD differences were found when saline wastes were diluted with standard (non-saline) BOD dilution water. Bacterial populations to genera were monitored and it was shown that equivalent numbers of bacteria did not have the same capability to degrade a given amount of waste with increases in salt concentrations to the 3% level. Seeding of hypersaline wastewaters with known salt tolerant species is recommended for consistent BOD results.

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