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    • 8. 发明授权
    • Process to stabilize bioorganic, raw or treated wastewater sludge
    • 稳定生物有机废水,污水处理废水的工艺
    • US5417861A
    • 1995-05-23
    • US170705
    • 1993-12-21
    • Jeffrey C. Burnham
    • Jeffrey C. Burnham
    • C02F1/58C02F1/66C02F11/12C02F11/18C05D3/00C05D9/00C05F7/00C05F17/00C02F11/16
    • C02F1/586C02F1/66C02F11/12C02F11/18C05D3/00C05D9/00C05F17/0018C05F7/00C02F1/281Y02E50/343Y02P20/145Y02W30/43Y02W30/47Y10S210/916
    • A method for treating bioorganic or raw or treated wastewater sludge so that a stability based upon achieving a significant microbial population, conductivity level and percent solids, is developed rapidly, is provided for indefinitely and is independent of climatic conditions. A dewatered sludge that has not been treated (i.e., raw) or a sludge that has been treated to a PSRP level or a sludge that has been treated to a PFRP level, i.e., pasteurized or sterilized sludge when still in a wet condition, i.e., between 12%-30% solids, or when in a dry condition, i.e., between 30-60% solids, is mixed with alkaline adsorptive materials to reduce odor, to increase the percent solids and to facilitate granulation, is adjusted to a mildly alkaline pH, and is adjusted to an ionic conductivity which will allow the sludge to mature rapidly when seeded with a beneficiating microbial flora. This process will reduce the pH or a high alkaline treated sludge, e.g., often above pH 12, to a physiological pH of between 7 and 9.5 or will raise the pH of a treated acid sludge to a similar range so that microbial activity can proceed to facilitate stability. Heat may be applied to the mixture to accelerate the carbonation and aid the overall drying process. The granular product, substantially due to its active microbial population, is useful as an agricultural product and topsoil blend.
    • 一种用于处理生物有机废水或处理废水污泥的方法,使得基于实现显着的微生物群体,电导率水平和固体百分比的稳定性得到迅速发展,被无限期地提供并且独立于气候条件。 未经处理(即生料)或经过PSRP处理的污泥或已经处理为PFRP水平的污泥的脱水污泥,即仍处于潮湿条件下的巴氏消毒或灭菌污泥,即 ,固体含量为12%-30%之间,或干燥条件下,即30-60%固体之间,与碱性吸附材料混合,以减少气味,增加固体百分比和促进造粒,调节至温和 碱性pH值,并调整为离子电导率,当使用有益微生物菌群接种时,这将使污泥快速成熟。 该方法将pH或高碱性处理的污泥(例如,通常高于pH 12)降低至7至9.5的生理pH,或将处理过的酸性污泥的pH提高至相似的范围,以使微生物活性进行到 方便稳定。 可以对混合物施加热量以加速碳酸化并有助于整个干燥过程。 基本上由于其活性微生物群体的颗粒产物可用作农产品和表土混合物。
    • 9. 发明授权
    • Method for treating sludge using recycle
    • 使用回收处理污泥的方法
    • US07083728B2
    • 2006-08-01
    • US10669462
    • 2003-09-25
    • Terry J. LoganMichael G. NicholsonNeil Webster
    • Terry J. LoganMichael G. NicholsonNeil Webster
    • C02F3/00
    • C02F11/14C02F1/66C02F11/185C02F2209/005
    • A method and system for treating at least bioorganic, organic, wastewater, and sewage sludge using recycle. The method of producing a treated sludge product comprises the following steps: (a) forming a sludge mixture by mixing untreated sludge with at least one alkaline material in an amount sufficient to raise pH of the sludge mixture to a level of at least about 12 and to increase percent solids in the sludge mixture to at least about 40% by weight; (b) forming a dried sludge mixture by drying the sludge mixture from step (a) in a direct or indirect dryer thereby increasing the percent solids thereof to at least about 50% by weight; (c) recycling a portion of the dried sludge mixture from step (b) to step (a); and (d) pasteurizing the dried sludge mixture from step (b) at a temperature at or above about 52° C. to form a treated sludge product. Exemplary applications for the treated sludge product include an agricultural liming agent, a soil conditioner, a fertilizer, a topsoil blend ingredient, and a fuel.
    • 一种利用再循环处理至少生物有机,有机,废水和污水污泥的方法和系统。 生产经处理的污泥产品的方法包括以下步骤:(a)通过将未处理的污泥与至少一种碱性物质混合形成污泥混合物,其量足以将污泥混合物的pH提高到至少约12的水平, 将污泥混合物中的固体百分比增加至至少约40重量%; (b)通过在直接或间接干燥器中干燥来自步骤(a)的污泥混合物形成干燥的污泥混合物,从而将其固体百分比增加至至少约50重量%; (c)将一部分干燥的污泥混合物从步骤(b)循环到步骤(a); 和(d)在等于或高于约52℃的温度下将来自步骤(b)的干燥的污泥混合物巴氏杀菌以形成经处理的污泥产物。 经处理的污泥产品的示例性应用包括农用石灰剂,土壤调节剂,肥料,表土混合物成分和燃料。