ScienceON 검색
ScienceON '특허' 검색
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BIOLOGICAL MEMBRANE FILTERING METHOD AND SYSTEM THEREFOR / TAKUMA CO LTD PROBLEM TO BE SOLVED: To stably reconcile the filtering of SS and denitrification in membrane filtration with high efficiency.SOLUTION: Washing wastewater of a filter bed discharged from a biological membrane filter is divided and one of divisions is treated so that SS contained in the washing wastewater is made low-molecular to be converted to water soluble organic matter and used as a nutrition source of denitrifying microorganisms while the other one of them is adjusted so as to replenish the biological membrane peeled and washed in a filter bed using SS as the biological membrane and the required amount thereof is controlled to be circulated and returned to the biological membrane filter. It is preferable to use a moving bed type biological membrane sand filter. The capacity of the filter bed can be stably held over a long period of time without obstructing a filtering capacity.COPYRIGHT: (C)2003,JPO |
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TREATMENT METHOD FOR ORGANIC-CONTAINING ALKALINE WASTE LIQUID / KAWASAKI STEEL CORP PROBLEM TO BE SOLVED: To provide a treatment method for an organic-containing alkaline waste liquid whereby the increase in the COD and SS of a treated liquid is prevented and the COD and BOD of a treated liquid can be decreased by adding an acidic solution containing Fe2+ to the waste liquid before subjecting the liquid to aeration with an activated sludge. SOLUTION: Ammoniacal liquor 52 from which the most part of free ammonia compounds, cyanate compounds, and hydrogen sulfide are removed in advance by distillation is supplied from an ammoniacal liquor storage vessel 51 to an adjustment vessel 1, and diluting water 53, waste hydrochloric acid 11 generated in the step of pickling steel sheets as an acidic solution containing Fe2+, and phosphoric acid 54 as a nutrition source are supplied. The ammoniacal liquor having a pH adjusted to about 7.0 is led into an aeration vessel 2 to be aerated, and organic substances are oxidatively decomposed by an activated sludge into water and carbon dioxide. The treated liquid is led to a precipitation vessel 3, and a part 55 thereof is returned to the aeration vessel 2. An overflowing treated liquid 56 comes into a neutralization vessel 57, where, if necessary, ferric chloride 61 is added to the liquid 56. The liquid is then sent to a sedimentation vessel 62 to sediment activated sludge, or the like, and the liquid overflowing the vessel 62 is clarified and discharged 66. |
ScienceON '논문' 검색
더보기ScienceON '보고서' 검색
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| 1 |
주산기 고과당 노출에 의한 소금 감수성 및 고혈압의 발병과 대물림 김인겸 , 경북대학교 , 2021 |