Method and apparatus for measuring the nitrification effectivene

Chemistry: analytical and immunological testing – Oxygen demand

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

436106, 436110, 436127, 436138, 436181, 422 79, 422 80, 435 29, 4352871, 210601, 210611, 210612, 210613, 210614, G01N 3318

Patent

active

061468967

ABSTRACT:
A method and apparatus for determining nitrification effectiveness of activated sludge in an aqueous solution, includes supplying equivalent quantities of an activated sludge, an aqueous solution, and a gas containing oxygen to each of first and second reaction vessels; simultaneously delivering a nitrification inhibitor to only the second reaction vessel; performing a bacterial respiration reaction in the vessels for either a preselected period of time or continuously in which case the materials are supplied per unit of time so that the bacterial respiration reaction in the first reaction vessel, where oxygen consumption as a result of total bacterial respiration occurs and includes oxygen consumption as a result of endogenous respiration, oxygen consumption as a result of nitrification, and oxygen consumption as a result of degradation of carbon compounds, may be compared with the respiration reaction in the second reaction vessel where oxygen consumption includes oxygen consumption as a result of endogenous respiration, and oxygen consumption as a result of degradation of carbon compounds, but where oxygen consumption as a result of nitrification is at least inhibited; measuring oxygen content for each of the vessels after the same reaction time either above the respective aqueous solutions or continuously in respective waste gas streams escaping from the respective reaction vessels to obtain at least one measured value for the respective vessels of one of oxygen content or a variable derived therefrom; determining the nitrification effectiveness of the activated sludge per unit quantity thereof by subtracting the measured values for the second reaction vessel from the first reaction vessel to provide a difference value; supplying the equivalent preselected quantities of an activated sludge including nitrifying bacteria, pure water, and a gas containing oxygen to a third reaction vessel; and performing a bacterial respiration reaction in the third reaction vessel for either the predetermined period of time or continuously so that the bacterial respiration reaction in the third reaction vessel where oxygen consumption is due only to endogenous respiration may be compared to that in at least one of the first and second reaction vessels.

REFERENCES:
patent: 4329232 (1982-05-01), McKenna
patent: 4620930 (1986-11-01), McDowell
patent: 4693827 (1987-09-01), Mordorski
patent: 4898829 (1990-02-01), Siepmann et al.
Surmacz-Gorska et al. Water Research, vol. 30, No. 5, pp. 1228-1236, 1996.
Robinson. Toxicity Assessment : An International Journal, vol. 3, pp. 17-31, 1988.
Chemical Abstracts 85 (1976) 181947n; Stensel, H.D.etal. J. Water Pollut. Control Fed. 48 (1976) 2343-2350.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Method and apparatus for measuring the nitrification effectivene does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for measuring the nitrification effectivene, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for measuring the nitrification effectivene will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2064008

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.