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    • 34. 发明授权
    • EFFLUENT TREATMENT PROCESS
    • VERFAHREN ZUR ABWASSERBEHANDLUNG
    • EP0625961B1
    • 1998-09-30
    • EP93914508.2
    • 1993-02-01
    • CHEMRING GROUP PLC
    • GRANT, Roy Arthur
    • C02F11/12C02F3/28C05F7/00
    • C02F11/127C02F3/28C02F11/004C02F11/12C05F7/00C05F17/0018Y02A40/213Y02E50/343Y02P20/145Y02W10/40Y02W30/43Y02W30/47
    • A process for treating effluent such as untreated biological effluent includes a primary clarifier (1) where sludge solids are settled out from a liquid sludge fraction. The sludge solids pass to a digester (2) where the sludge solids undergo anaerobic digestion to produce digested sludge and biogas. The digested sludge is dewatered and the liquid sludge fraction and the liquid component of the dewatered digested sludge is passed to an activated sludge tank (6). The resulting activated sludge solids are then concentrated by settlement, dewatered, and flocculated under alkaline and acidic conditions. The resultant acidic activated sludge solids are neutralized before and passed to a mixing and drying apparatus (5) where the solids are mixed with the digested sludge and dried using the bio-gas as a fuel.
    • 用于处理诸如未处理的生物流出物的流出物的方法包括其中污泥固体从液体淤泥级分沉降出来的初级澄清池(1)。 污泥固体通过消化器(2),其中污泥固体进行厌氧消化以产生消化的污泥和沼气。 消化污泥脱水,脱水消化污泥的液体残渣部分和液体成分通入活性污泥槽(6)。 然后通过在碱性和酸性条件下沉降,脱水和絮凝来浓缩所得的活性污泥固体。 所得到的酸性活性污泥固体在混合和干燥装置(5)之前被中和,并将其传送到混合和干燥装置(5)中,其中固体与消化的污泥混合并使用生物气体作为燃料进行干燥。