Radiation treatment of municipal effluent

✍ Scribed by Teruko Sawai; Masayuki Sekiguchi; Toshinari Shimokawa; Takeshi Sawai

• Book ID: 103990288
• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 398 KB
• Volume: 42
• Category: Article
• ISSN: 0969-806X
• DOI: 10.1016/0969-806x(93)90360-7

✦ Synopsis

The recycling of municipal wastewater is an effective means of coping with the water shortage in Tokyo. After irradiation, the refractory organic substances in wastewater were decomposed. COD, light brown color, offensive odor and foaminess in the effluents were reduced with increasing dose. Inactivation efficiencies(D 10) of six microorganisms added to the secondary effluents and return sludge supernatant by irradiation were investigated. The survival curves of total bacteria, total coliforms and enterococci in the secondary effluents were compared. The number of total coliforms exponentially decreased with increasing dose and fell to undetectable levels at 0.5 kGy. The elimination of suspended solids in the secondary effluents is effective in diminishing the dose required to disinfect and prevent bacteria regrowth.