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    • 2. 发明授权
    • Bio-surface separation process
    • 生物表面分离过程
    • US4200524A
    • 1980-04-29
    • US954534
    • 1978-10-25
    • Gilbert V. Levin
    • Gilbert V. Levin
    • C02F3/08C02F1/72C02F3/12C02C1/04
    • C02F3/085C02F1/72Y02W10/15
    • There is disclosed an activated sludge sewage treatment process which comprises mixing influent sewage material with activated sludge and bio-surface particulates to provide a mixed liquor. The mixed liquor is passed to an aeration zone wherein it is contacted with an oxygen-containing gas to reduce the BOD content thereof. The mixed liquor is then passed to a settling zone in which it is settled to separate bio-surface particulates having sludge particles adherent thereto and a clarified supernatant. The clarified supernatant is removed from the settling zone and is discharged as effluent or routed for further treatment. At least a portion of the bio-surface particulates having sludge adherent thereto is subjected to a treatment to separate at least a portion of the adherent sludge particles. The thus treated portion of the bio-surface particulates, which may still have some sludge particles adherent thereto, and separated sludge particles is then passed to a bio-surface particulate sludge separator. In this separator, the sludge present in the mixture which is not adherent to the bio-surface particulates separates from the bio-surface particulates and at least a portion of the sludge is passed out of the system as waste sludge which is essentially free of the biosurface particulates. The bio-surface particulates and remaining sludge are then recycled for mixing with said influent sewage material.
    • 公开了一种活性污泥污水处理方法,其包括将流入污水与活性污泥和生物表面微粒混合以提供混合液。 将混合液体通入通气区域,其中与含氧气体接触以减少其BOD含量。 然后将混合的液体通入沉降区,在该沉淀区中沉降,分离出具有粘附剂的污泥颗粒和澄清的上清液的生物表面颗粒。 将澄清的上清液从沉降区中取出,并作为流出物排出或排出进行进一步处理。 将附着有污泥的生物表面微粒的至少一部分进行处理以分离至少一部分贴附污泥颗粒。 然后将如此处理的生物表面颗粒物(其仍然可能具有粘附剂的一些污泥颗粒)和分离的污泥颗粒传递到生物表面颗粒污泥分离器。 在该分离器中,存在于混合物中的不附着于生物表面微粒的污泥与生物表面颗粒分离,并且至少一部分污泥作为废物污泥从系统中排出,其基本上不含 生物表面微粒。 然后将生物表面颗粒和剩余污泥再循环用于与所述流入污水材料混合。
    • 10. 发明公开
    • Enhanced phosphate removal in an activated sludge wastewater treatment process
    • Verbesserte Beseitigung von Phosphaten in der Abwasserbehandlung mit Belebtschlammverfahren。
    • EP0408878A1
    • 1991-01-23
    • EP90110439.8
    • 1990-06-01
    • Biospherics Incorporated
    • Levin, Gilbert V.Wright, Ronald R.
    • C02F3/12C02F3/30C02F1/58
    • C02F3/1215C02F3/308Y02W10/15Y10S210/906
    • There is disclosed an activated sludge wastewater treatment process which comprises aerating a mixed liquor comprising phosphate-containing influent wastewater and activated sludge in an aeration or high-purity oxygen zone to reduce the BOD/COD content of the wastewater and to cause the microorganisms present to take up phosphate. A phosphate-enriched sludge in which the phosphorus is present primarily in the sludge solids is separated from the mixed liquor to provide a substantially phosphate-free effluent. At least a portion of said phosphate-enriched sludge is passed to a phosphate pre-stripping zone, either in a separate tank or within the phosphate stripper tank itself, where BOD/COD-containing water, or feedwater, containing at least 50 mg/L of BOD, is added to poise the sludge organisms to begin enhanced rapid release of dissolved phosphate by pre-stripping it from the sludge or poising the sludge for rapid, enhanced release of phosphate. Thence, the sludge is passed to a phosphate stripping zone. In the phosphate stripping zone, the sludge settles to form a supernatant liquor in the stripping zone upper section and settled sludge in the stripping zone lower section. The settled sludge is maintained under anaerobic conditions for a time sufficient to complete the release of the desired amount of phosphate from the sludge solids to the liquid phase of said settled sludge. At least a portion of the anaerobic sludge from the phosphate stripping zone is recycled to the aeration or high-purity oxygen zone as activated sludge. The phosphate-rich supernatant from the phosphate stripping zone may be applied directly to land, or treated with a chemical precipitating agent to precipitate the phosphate therefrom and the precipitated phosphate may then be removed through the use of a reactor/clarifier, primary or secondary clarifier or other tankage, thus preparing the phosphate for final disposal directly or as fresh, digested or otherwise treated sludge.
    • 公开了一种活性污泥废水处理方法,其特征在于,在曝气或高纯度氧气区域中充气含有含磷酸盐的流出废水和活性污泥的混合液,以降低废水的BOD / COD含量,并使微生物存在 摄取磷酸盐 其中磷主要存在于污泥固体中的磷酸盐富集污泥从混合液体中分离出来,以提供基本上无磷酸盐的流出物。 所述富含磷酸盐的污泥的至少一部分通过磷酸盐预汽提区,或者在分离的罐或磷酸盐汽提塔箱内,其中BOD / COD的水或给水含有至少50mg / L的BOD被添加以使污泥生物体逐渐增加,以便通过从污泥中预先去除污泥或使污泥快速,增加磷酸盐释放来开始增强溶解磷酸盐的快速释放。 然后,将污泥送至磷酸盐汽提区。 在磷酸盐汽提区,污泥沉降,在汽提区上段形成上清液,在汽提区下段沉淀污泥。 沉淀的污泥在厌氧条件下保持足以完成将所需量的磷酸盐从污泥固体释放到所述沉淀污泥的液相的时间。 来自磷酸盐汽提区的至少一部分厌氧污泥被再循环到曝气或高纯度氧区作为活性污泥。 来自磷酸盐汽提区的富含磷酸盐的上清液可以直接施用于陆地,或用化学沉淀剂处理以从其中沉淀磷酸盐,然后可以通过使用反应器/澄清器,初级或次级澄清器 或其他油罐,从而制备磷酸盐,以便最终处置直接或作为新鲜,消化或以其他方式处理的污泥。