Abstract |
This study was directed at determining factors important in sewage chlorination. It was found that: (1) controlled bio-oxidation looms as a key to effective chlorination; (2) additional observations confirmed the generally marked increase in chlorine demand and interference with disinfection by amino acids; (3) efficiency of aeration is dependent on microbial activity; (4) cystine, cysteine, and uric acid have high-chlorine demands, but cause little or no interference with chlorine disinfection; (5) subchlorination disinfection was observed, but was regarded as a minor factor; (6) a dechlorinating activated sludge system was a means of drastically reducing the high toxicity of chlorinated sewage effluent to fish; and (7) low temperature markedly retards chlorine disinfection. |