Liquid purification or separation – With alarm – indicator – register – recorder – signal or... – Responsive to fluid flow
Patent
1975-02-04
1976-02-17
Hart, Charles N.
Liquid purification or separation
With alarm, indicator, register, recorder, signal or...
Responsive to fluid flow
210 12, 210 16, 210 18, 210DIG27, C02C 106
Patent
active
039390683
ABSTRACT:
Total removal of cellulose nitrate particles from a waste water stream is accomplished by a combination of chemical and biological treatments which result in an effluent having a greatly reduced concentration of nitrogen compounds and having an acceptable BOD. The first step in the process requires that the insoluble, non-biodegradable cellulose nitrate particles be chemically digested with alkali to produce soluble products. Following digestion, the waste stream is supplemented with domestic raw sewage and a microbially utilizable carbon source and the supplemented waste stream is subjected first to an anaerobic microbial denitrification treatment to eliminate the oxidized forms of nitrogen and then to an aerobic microbial treatment to reduce BOD and to oxidize reduced nitrogen compounds. The effluent therefrom is again supplemented with a microbially utilizable carbon source and subjected to a final anaerobic microbial denitrification to remove nitrates present in the waste water resulting from nitrification processes occurring during the aerobic treatment step.
REFERENCES:
patent: 3607736 (1971-09-01), Yusho
patent: 3617540 (1971-11-01), Bishop et al.
patent: 3709364 (1973-01-01), Savage
patent: 3801499 (1974-04-01), Luck
patent: 3817857 (1974-06-01), Torpey
Mudrack, P. V. Eng. Bull. Ext. Ser., 1966 pp. 656-664.
Amant et al. "Methods of Removing Nitrates from Water," J. Agr Food Chem., 970, pp. 785-788.
Amant et al. "Treatment Of High Nitrate Water," J. A WWA pp. 659-662.
Kaplan Arthur M.
Wendt Theodore M.
Edelberg Nathan
Gibson Robert P.
Hart Charles N.
Hruskoci Peter A.
Labadini Lawrence E.
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