Wastewater disinfection with a combination of biocides

Details Wastewater disinfection with a combination of biocides Wastewater disinfection with a combination of biocides

1988-11-18

1990-09-25

Wyse, Tom

Liquid purification or separation

Processes

Chemical treatment

210755, 210764, C02F 150

Patent

active

049591576

ABSTRACT:
Wastewater is effectively disinfected while reducing both chlorine consumption and more particularly the levels of residual chlorine discharged from the wastewater treatment plant. The wastewater is first contacted with a sufficient amount of chlorine to satisfy the chlorine demand and to obtain as low a residual level of chlorine as possible. After the chlorine demand has been satisfied, the wastewater is disinfected with an effective amount of 2,2-dibromo-3-nitrilopropionamide.

REFERENCES:
patent: 3493658 (1970-02-01), Schmidt et al.
patent: 4732913 (1988-03-01), Donofrio et al.
patent: 4800082 (1989-01-01), Karbowski et al.
Karbowski et al., "DNPA: An Alternative for Reducing Chlorine Residuals in Municipal Wastewater Treatment Plants", presented at the annual conference of the Water Pollution Control Federation, Dallas, Texas, Oct. 5, 1988.
Walter, Jr. et al., "Compatiability of DBNPA with Chlorine as Water Treatment Biocides", presented at the 46th Annual Meeting of the International Water Conference, Pittsburgh, Pa., Nov. 4-7, 1985.

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