Control of trihalomethanes in water treatment

Details Control of trihalomethanes in water treatment Control of trihalomethanes in water treatment

1981-11-03

1983-05-31

Wyse, Thomas G.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210753, 210757, 210764, 210908, C02F 158

Patent

active

043859968

ABSTRACT:
Trihalomethanes (THM's) in water, particularly in drinking water, are substantially reduced by treatment of the water with small amounts, i.e., below about 50 ppm, of sulfite ion supplied by sodium metabisulfite or sulfur dioxide. The addition to the water of the sodium metabisulfite alters the structure of the THM's precursor and lowering the chlorine demand. The sulfite ion may be introduced prior to chlorination, or at an intermediate stage of the chlorination, or in adjunct with the chlorination which permits the use of substantially reduced amounts of chlorination.

REFERENCES:
patent: 3909408 (1975-09-01), Ishida et al.
patent: 3953330 (1976-04-01), Tonkyn et al.
patent: 3994806 (1976-11-01), Rausch et al.
patent: 4243525 (1981-01-01), Greenberg
patent: 4282104 (1981-08-01), Pacini
patent: 4340489 (1982-07-01), Adams et al.
A. L. Lange et al., J. AWWA Nov. 1978, pp. 653-660.
R. A. Baker, J. AWWA, Dec. 1964, pp. 1578-1592.
J. S. Schreiber, J. AWWA, Mar. 1981, pp. 154-159.
H. Hayatsu CA 93: 209358n (1980).
M. D. Umphres, et al., Water/Eng. & Mgt. (1981), pp. R65-R74.
J. J. Rook, Env. Sci. Tech. 11 (1977), pp. 478-482.
V. L. Snoeyink, et al., Chap 16, Disinfection-Water and Waste-Water, pp. 339-358, Ann Arbor Publ. Co. (1975).
U. Lahl, et al., Water Research vol. 15 (1981) pp. 803-814.
T. Baba, et al., CA 84:111339w (1976).
R. Otson, et al., Env. Sci. Tech. 15 (1981), pp. 1075-1080.
I. M. Rice et al., Water/Eng. & Mgt. (1981), pp. 59-66.
J. Drahonovsky, CA 89:64730h (1978).

Affiliated with

Also associated with

Rating

Control of trihalomethanes in water treatment does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Control of trihalomethanes in water treatment, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control of trihalomethanes in water treatment will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2245261