Method for stabilizing and conditioning urban and industrial wastewater sludge
    2.
    发明申请
    Method for stabilizing and conditioning urban and industrial wastewater sludge 有权
    城市和工业废水污泥的稳定和调理方法

    公开(公告)号:US20050077245A1

    公开(公告)日:2005-04-14

    申请号:US10497059

    申请日:2002-11-29

    摘要: The invention concerns a method for stabilizing and conditioning wastewater sludge. The invention is characterized in that it consists in treating sludge in an acid environment (3.0≦pH≦5.0), with an inorganic acid and two oxidizing agents, that is a ferric iron salt and hydrogen peroxide. The ferric iron salt is used in such an amount as to obtain a concentration ranging between 5 and 40 kg of Fe per iron of dry sludge; the hydrogen peroxide is used in such an amount as to obtain a concentration ranging between 5 and 40 kg of H2O2 per ton of dry sludge; mixing the treated sludge for a time interval sufficient to stabilize the sludge and improve its dehydrability; then flocculating the stabilized sludge by adding an organic polymer; then dehydrating the flocculated sludge. Said method enables to significantly improve the dehydrability properties of the sludge while increasing the dry solid content during its mechanical dehydration.

    摘要翻译: 本发明涉及一种稳定和调理废水污泥的方法。 本发明的特征在于它包括用酸性环境(3.0 <= pH <= 5.0)处理污泥中的无机酸和两种氧化剂,即三价铁盐和过氧化氢。 使用三价铁盐,其用量可获得每铁铁干渣5〜40kg的铁浓度; 过氧化氢的使用量要达到每吨干污泥5至40公斤H2O2的浓度; 将经处理的污泥混合足够的时间间隔以稳定污泥并提高其脱水性; 然后通过加入有机聚合物絮凝稳定的污泥; 然后使絮凝的污泥脱水。 所述方法能够显着改善污泥的脱水性能,同时在机械脱水过程中增加干固体含量。

    PROCESS FOR DECONTAMINATING PRESERVATIVE-TREATED WOOD AND RECOVERING METALS FROM LEACHATES
    3.
    发明申请
    PROCESS FOR DECONTAMINATING PRESERVATIVE-TREATED WOOD AND RECOVERING METALS FROM LEACHATES 审中-公开
    去除防腐处理木材和从浸出中回收金属的工艺

    公开(公告)号:US20110108063A1

    公开(公告)日:2011-05-12

    申请号:US12736455

    申请日:2009-04-08

    IPC分类号: B08B7/04

    CPC分类号: B27K3/16 B27K2240/15

    摘要: Described is a process for decontaminating wood treated with preservative such as chromium copper arsenate (CCA) including contacting the contaminated wood with water and inorganic acid at a concentration between 0.05 and 0.8 N at less than 100° C. to leach out the contaminants and then separate the wood from the solution. Also described is a process for extracting metals such as copper from a solution containing chromium, copper and arsenic, such as the leachate solution used to decontaminate CCA-treated wood, by precipitation using a coagulant at a pH favoring precipitation of arsenic and continued solubility of copper, or by ion exchange resins.

    摘要翻译: 描述了用防腐剂如砷酸铜铜(CCA)处理的木材进行净化处理的方法,包括在低于100℃下将污染的木材与水和无机酸的浓度为0.05-0.8N接触以浸出污染物,然后 将木材与溶液分开。 还描述了从含有铬,铜和砷的溶液中提取金属的方法,例如用于净化CCA处理过的木材的渗滤液,通过在有利于砷沉淀的pH下使用凝结剂进行沉淀,并持续溶解度 铜或通过离子交换树脂。

    Semi-continuous bacterial leaching process
    4.
    发明授权
    Semi-continuous bacterial leaching process 失效
    半连续细菌浸出过程

    公开(公告)号:US5454948A

    公开(公告)日:1995-10-03

    申请号:US109988

    申请日:1993-08-23

    IPC分类号: C02F3/34 C22B3/18 C02F11/00

    摘要: The present invention relates to a semi-continuous process for removing heavy metals, substantially reducing volatile suspended solids and substantially destroying indicator bacteria from municipal sludges, which comprises: a) adding 1 to 3 g of sulphur per liter to a volume of municipal sludge and allowing the sulphur oxidizing thiobacilli initially present in said sludge to proliferate under aerobic conditions in said sludge being agitated until the pH of said sludge is lowered to about 1.5 to 2.5 which causes heavy metals present in said sludge to be substantially solubilized, the concentration of volatile suspended solids is substantially reduced and the concentration of indicator bacteria to be lowered to a non-toxic level; b) removing about 90% of said low pH sludge and recovering the solubilized heavy metals therefrom; c) adding about 90% of municipal sludge to the remaining low pH sludge of step b), thereby resulting in a sludge mixture having a pH of about 7 to 8; and d) repeating steps a) to c); whereby the thiobacilli are adapted when the time required for lowering the pH of the sludge to 1.5 to 2.5 is about the same in two successive operations.

    摘要翻译: 本发明涉及一种用于去除重金属,基本上减少挥发性悬浮固体并基本上破坏来自市政污泥的指示剂细菌的半连续方法,其包括:a)每升将1至3g硫加入一定量的城市污泥中, 允许最初存在于所述污泥中的硫氧化硫杆菌在需氧条件下在所述污泥中搅拌,直到所述污泥的pH降低至约1.5至2.5,这导致所述污泥中存在的重金属基本上溶解,挥发物的浓度 悬浮固体显着减少,指示剂细菌的浓度降至无毒水平; b)去除约90%的所述低pH污泥并从其中回收溶解的重金属; c)向步骤b)的剩余低pH污泥中加入约90%的市政污泥,从而导致pH为约7至8的污泥混合物; 和d)重复步骤a)至c); 从而当将两个连续的操作中将污泥的pH降低至1.5至2.5所需的时间大致相同时,硫杆菌适应。

    PROCESS, DECONTAMINANT AND CHEMICAL KIT FOR THE DECONTAMINATING MEDIA POLLUTED WITH METALS AND HYDROPHOBIC ORGANIC COMPOUNDS
    6.
    发明申请
    PROCESS, DECONTAMINANT AND CHEMICAL KIT FOR THE DECONTAMINATING MEDIA POLLUTED WITH METALS AND HYDROPHOBIC ORGANIC COMPOUNDS 有权
    用金属和疏水有机化合物污染介质的方法,去除和化学试剂盒

    公开(公告)号:US20130012752A2

    公开(公告)日:2013-01-10

    申请号:US12681554

    申请日:2010-09-10

    IPC分类号: B09C1/04 A62D3/00 B09C1/02

    摘要: A process for decontaminating a medium polluted with metals and hydrophobic organic compounds (HOC) includes providing an acidic slurry of water, acid, chloride salt, surfactant, and the polluted medium. Flotation is preformed on the acidic slurry to form a HOC-rich froth and an HOC-depleted slurry and the froth is recovered. The slurry is separated to obtain a treated solid and a liquid effluent rich in metallic ions. Preferably, the process also includes recuperating the metals by chemical precipitation and/or electrodeposition to produce a treated solution. Also provided are a decontaminant having an acid, a chloride salt, and a surfactant as well as a chemical kit for decontaminating the polluted medium including the decontaminant in which the acid, chloride salt and surfactant can be mixed with polluted medium in the presence of water before removing at least a portion of the metals and HOC from the polluted medium.

    摘要翻译: 用金属和疏水性有机化合物(HOC)污染的介质去污的方法包括提供水,酸,氯化物盐,表面活性剂和污染介质的酸性浆液。 在酸性浆料上进行浮选以形成富含HOC的泡沫和HOC贫化的浆料,回收泡沫。 分离浆料以获得处理的固体和富含金属离子的液体流出物。 优选地,该方法还包括通过化学沉淀和/或电沉积来还原金属以产生处理的溶液。 还提供了具有酸,氯化物盐和表面活性剂的净化剂以及用于净化包括其中酸,氯化物盐和表面活性剂在污染介质中的污染介质的化学试剂盒,其中可以在水存在下与污染介质混合 在从污染介质中除去至少一部分金属和HOC之前。

    Methods and apparatus for treating animal manure
    8.
    发明申请
    Methods and apparatus for treating animal manure 审中-公开
    处理动物粪便的方法和装置

    公开(公告)号:US20070029243A1

    公开(公告)日:2007-02-08

    申请号:US11545150

    申请日:2006-10-10

    IPC分类号: C02F1/24

    摘要: A method of treating animal manure yielding a final liquid fraction and solid fractions whereby the final liquid fraction has a suspended solids (SS) content of about 3g/L or lower comprising subjecting at least a part of said manure to a first biological passive flotation step in a flotation unit having a hydraulic residency time (HRT) of about 4 to about 24 hours with a polymer to yield a first flotation solid fraction and a first flotation liquid fraction, said method comprising a further treatment. An apparatus for treating animal manure comprising a main flotation unit having a HRT of about 4 to about 24 hours, said main flotation units including skimming means for removing floating solids from at least a portion of the surface of the manure and dredging means for removing settled contaminants from at least a portion of the bottom of the tank, whereby at least a part of said manure is directed to the main flotation unit wherein it is separated in a first floating solids fraction, a second liquid fraction and a first settled solids fraction and wherein the second liquid fraction has a SS content of about 3g/L or lower.

    摘要翻译: 一种处理动物粪便的方法,其产生最终的液体馏分和固体馏份,由此最终液体馏分具有约3g / L或更低的悬浮固体(SS)含量,包括使至少一部分所述粪便进行第一生物被动浮选步骤 在具有聚合物的约4至约24小时的水力停留时间(HRT)的浮选单元中,以产生第一浮选固体部分和第一浮选液体馏分,所述方法包括另外的处理。 一种用于处理动物粪便的装置,包括具有约4至约24小时的HRT的主浮选单元,所述主浮选单元包括用于从粪便表面的至少一部分去除漂浮固体的撇渣装置和用于除去沉降的 来自罐底部的至少一部分的污染物,其中所述粪便的至少一部分被引导到主浮选单元,其中它在第一浮选固体馏分,第二液体馏分和第一沉淀固体馏分中分离, 其中所述第二液体馏分的SS含量为约3g / L或更低。

    Methods and apparatus for treating animal manure
    9.
    发明申请
    Methods and apparatus for treating animal manure 失效
    处理动物粪便的方法和装置

    公开(公告)号:US20050000906A1

    公开(公告)日:2005-01-06

    申请号:US10465964

    申请日:2003-04-08

    摘要: A method of treating animal manure yielding a final liquid fraction and solid fractions whereby the final liquid fraction has a suspended solids (SS) content of about 3 g/L or lower comprising subjecting at least a part of said manure to a first biological passive flotation step in a flotation unit having a hydraulic residency time (HRT) of about 4 to about 24 hours with a polymer to yield a first flotation solid fraction and a first flotation liquid fraction, said method comprising a further treatment. An apparatus for treating animal manure comprising a main flotation unit having a HRT of about 4 to about 24 hours, said main flotation units including skimming means for removing floating solids from at least a portion of the surface of the manure and dredging means for removing settled contaminants from at least a portion of the bottom of the tank, whereby at least a part of said manure is directed to the main flotation unit wherein it is separated in a first floating solids fraction, a second liquid fraction and a first settled solids fraction and wherein the second liquid fraction has a SS content of about 3 g/L or lower.

    摘要翻译: 一种处理动物粪便的方法,其产生最终液体馏分和固体馏分,由此最终液体馏分具有约3g / L或更低的悬浮固体(SS)含量,包括使至少一部分所述肥料进行第一生物被动浮选 在聚合物中具有约4至约24小时的水力驻留时间(HRT)的浮选单元的步骤,以产生第一浮选固体部分和第一浮选液体馏分,所述方法包括另外的处理。 一种用于处理动物粪便的装置,包括具有约4至约24小时的HRT的主浮选单元,所述主浮选单元包括用于从粪便表面的至少一部分去除漂浮固体的撇渣装置和用于除去沉降的 来自罐底部的至少一部分的污染物,其中所述粪便的至少一部分被引导到主浮选单元,其中它在第一浮选固体馏分,第二液体馏分和第一沉淀固体馏分中分离, 其中所述第二液体馏分的SS含量为约3g / L或更低。