Foam flotation activated sludge process

Details Foam flotation activated sludge process Foam flotation activated sludge process

1977-04-25

1980-07-08

Wyse, Thomas G.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

210 11, 210 13, 435251, 435911, C02C 106, C02C 510

Patent

active

042116457

ABSTRACT:
The specification discloses making a mixed fungal (yeast and yeast-like) system culture adapted to biodegradation of spent sulfite liquor (SSL) comprising the steps of exposing a mixed culture system (being a sludge from a sewage treatment plant) to increasing concentration of SSL until the fungus becomes acclimatized to SSL of the desired concentration. The resulting biotic population comprises a fungal mixture, of yeast and yeast-like cultures. It was based on an autolytic culture system: Phialophora jeanselmei, Phialophora richardsiae, Hyalodendron liqnicola, Trichosporon infestans and Candida tropicalis. A method and apparatus are disclosed for biodegrading both the soluble substrates in a spent sulfite liquor and the biological solids produced therefrom by a potentially autolytic culture system. The method comprises the steps of adding a nutrient medium, adjusting the pH to mildly acid or neutral condition, feeding the mixture to a fungal culture inoculated fermentor with agitation and with aeration, resulting in foaming of the mixture, said foam carrying with it the fungi and sludge resulting from the fermentation, the suspended solids content of the foam when collapsed being generally not more than half the suspended solids content of the fermentor broth, said foam being processed so as to separate the components into a sludge and a clarified effluent, said sludge being recycled to the fermentor vessel and the clarified effluent prepared for discharge or additional processing. Under optimum operating conditions as much as 85 to 90% BOD removal from spent sulfite liquor is accomplished.

REFERENCES:
patent: 2897148 (1959-07-01), Laboureur et al.
patent: 3711392 (1973-01-01), Metzger
patent: 4085041 (1978-04-01), Fullerton et al.
Ng et al., "Effect of SO.sub.2 Removal on the Biodegradability of Arbiso Spent Sulphite Liquor," Water Pollution Research in Canada (1972).

Affiliated with

Also associated with

Rating

Foam flotation activated sludge process does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Foam flotation activated sludge process, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Foam flotation activated sludge process will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-559638