C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
362/17
C02F 3/02 (2006.01) C02F 3/34 (2006.01)
Patent
CA 2000982
(1) A process for high-load treatment of carbohydrate-containing waste water comprises the steps of separating a yeast appearing in the waste water, subjecting the separated yeast to large-quantity culture, and treating the waste water by a high-load operation using the cultured yeast as a seed fungus under the conditions of a volume load of 10 to 80 kg-BOD/m3 day and a yeast load of 1.0 to 5.0 kg-BOD/kg-yeastday, whereby it is possible to treat the high-concentration waste water efficiently with a small volume for treatment. The quantity of air required of a diffuser system blower may be 0.15 to 0.60 kg-O2/kg-BOD-removed, the value being 1/3 to 2/3 times that in a general activated sludge method. A pH of not more than 5.0 and a residence time of at least 1.5 hours may be employed. To obviate the conflict between the yeast and bacteria, it is recommendable to add C?2 to a reservoir in an amount of 10 to 50 mg/?. If it is impossible to add C?2 to the reservoir, the C?2 may be added to a yeast tank in the same amount as above- mentioned. This process, when carried out under the conditions mentioned above, promises an increase in the efficiency of the plant for treatment of the carbohydrate- containing waste water. Upon the treatment of the waste water, a surplus of yeast is generated, which contains (2) proteins and vitamines in high contents and, therefore, is capable of being taken by a fodder company as fodder or fertilizer; thus, the disposal cost associated with the surplus yeast is saved. On the other hand, an about 20% portion of the influent BOD, which is left upon the treatment with yeast, requires an after-treatment, so that an expense is necessary for disposal of the sludge formed. The disposal cost required in this case, however, is as low as about 1/4 times that required in the general activated sludge method, and the disposal cost for the after-treated sludge is substantially negligible because it can be canceled by selling the surplus yeast as fodder or fertilizer, as mentioned above. Thus, the process for high-load treatment of carbohydrate-containing waste water promises a marked reduction in the treatment cost for the waste water.
Chigusa Kaoru
Matsumaru Michiyo
Kirby Eades Gale Baker
Research Association Of Biotechnology For Organic Fertilizer
LandOfFree
Process for high-load treatment of carbohydrate-containing... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for high-load treatment of carbohydrate-containing..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for high-load treatment of carbohydrate-containing... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1652143