CN103395943B - 一种污水处理方法 - Google Patents
一种污水处理方法 Download PDFInfo
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- CN103395943B CN103395943B CN201310354017.2A CN201310354017A CN103395943B CN 103395943 B CN103395943 B CN 103395943B CN 201310354017 A CN201310354017 A CN 201310354017A CN 103395943 B CN103395943 B CN 103395943B
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- treatment
- precipitation
- sewage
- anaerobic
- carry
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Abstract
本发明公开了一种污水处理方法，其包括顺序执行的以下污水处理步骤：过滤处理步骤，沉淀处理步骤，厌氧处理步骤，缺氧处理步骤，好氧处理步骤，消毒处理步骤。采用上述方案，本发明采用多级处理方式，主要采用物理去污处理与生物去污处理相结合，能够有效将污水所含的污染物质从水中分离去除，使有害的物质转化为无害的物质、有用的物质，水则得到净化，并使资源得到充分利用，具有广泛的市场应用意义。
Description
技术领域
[0001] 本发明涉及污水处理，尤其涉及的是，一种污水处理方法。
背景技术
[0002] 城市污水处理是指为改变污水性质，使其对环境水域不产生危害而采取的措施。 城市污水处理一般分为三级：一级处理，应用物理处理法去除污水中不溶解的污染物和寄 生虫卵；二级处理，应用生物处理法将污水中各种复杂的有机物氧化降解为简单的物质； 三级处理，应用化学沉淀法、生物化学法、物理化学法等，去除污水中的磷、氮、难降解的有 机物、无机盐等。
[0003] 但是，现有的污水处理方法一般以一级处理为预处理，二级处理为主体，三级处理 很少使用，因此效果不佳。
[0004] 因此，现有技术存在缺陷，需要改进。
发明内容
[0005] 本发明所要解决的技术问题是提供一种新的污水处理方法。
[0006] 本发明的技术方案如下：一种污水处理方法，其包括顺序执行的以下污水处理步 骤：过滤处理步骤，沉淀处理步骤，厌氧处理步骤，缺氧处理步骤，好氧处理步骤，消毒处理 步骤。
[0007] 优选的，所述污水处理方法中，所述沉淀处理步骤还包括脱水处理子步骤：对沉淀 物进行脱水处理。
[0008] 优选的，所述污水处理方法中，所述厌氧处理步骤之前，还执行化学4理步骤。
[0009] 优选的，所述污水处理方法中，所述化学处理步骤之后，所述厌氧处理步骤之前， 还再次依序执行所述沉淀处理步骤与所述过滤处理步骤。
[0010] 优选的，所述污水处理方法中，所述好氧处理步骤之后，所述消毒处理步骤之前， 还再次依序执行所述沉淀处理步骤与所述过滤处理步骤。
[0011] 优选的，所述污水处理方法中，所述厌氧处理步骤、所述缺氧处理步骤以及所述好 氧处理步骤中，采用搅拌结合曝气方式，增强处理物质的流动性。
[0012] 优选的，所述污水处理方法中，所述厌氧处理步骤、所述缺氧处理步骤以及所述好 氧处理步骤的反应时间比例为1至2:1至4:4至10。
[0013] 优选的，所述污水处理方法中，所述厌氧处理步骤、所述缺氧处理步骤以及所述好 氧处理步骤的反应时间比例为1:2:6。
[0014] 优选的，所述污水处理方法中，所述污水处理步骤之前，还执行检测步骤：检测水 质并分析，选择执行至少部分所述污水处理步骤。
[0015] 优选的，所述污水处理方法中，互置所述过滤处理步骤与所述沉淀处理步骤的顺 序。
[0016] 采用上述方案，本发明采用多级处理方式，主要采用物理去污处理与生物去污处 理相结合，能够有效将污水所含的污染物质从水中分离去除，使有害的物质转化为无害的 物质、有用的物质，水则得到净化，并使资源得到充分利用，具有广泛的市场应用意义。
附图说明
[0017] 图1为本发明的一个实施例的示意图；
[0018] 图2为本发明的另一个实施例的示意图；
[0019] 图3为本发明的又一个实施例的示意图。
具体实施方式
[0020] 以下结合附图和具体实施例，对本发明进行详细说明。
[0021] 如图1所示，本发明的一个实施例是，一种污水处理方法，其包括顺序执行的以下 污水处理步骤：过滤处理步骤，沉淀处理步骤，厌氧处理步骤，缺氧处理步骤，好氧处理步 骤，消毒处理步骤。
[0022] 所述过滤处理步骤对污水进行过滤，例如，过滤处理步骤包括筛滤过程：将体积大 于预设值的固体漂浮物，采用预设一定大小网眼的格栅进行筛滤。优选的，采用两层格栅法 执行筛滤步骤，首先通过较大网眼的格栅进行筛滤，然后通过较小网眼的格栅进行筛滤，这 样，不仅提高了工作效率，还降低了小网眼格栅的损耗，节约了污水处理成本。优选的，所述 过滤处理步骤还采用活性炭吸附过滤法。优选的，互置所述沉淀处理步骤与所述过滤处理 步骤的顺序。优选的，所述过滤处理步骤还采用生物滤池爆气法进行第二级过滤，采用生物 系统完成除磷脱氮，然后混凝后过滤。优选的，混凝后先沉淀再过滤。生物系统可以选用现 有市售产品。
[0023] 所述沉淀处理步骤是在沉淀处理系统中，将污水中的30%以上的固体颗粒沉淀下 来；优选的，在所述沉淀处理步骤中，将污水中的80%乃至95%以上的固体颗粒沉淀下来。 例如，沉淀处理系统包括连通的沉砂池与沉淀池，污水先进入沉砂池，其中砂砾等较大的固 体颗粒在此沉淀下来，然后污水进入沉淀池，其中较细小的胶体物质或者细小的污泥等较 小的固体颗粒在此沉淀下来。优选的，所述污水处理方法中，所述沉淀处理步骤还包括脱 水处理子步骤：对沉淀物进行脱水处理。例如，所述脱水处理子步骤采用离心脱水方式；又 如，所述脱水处理子步骤包括，先执行所述过滤处理步骤，然后进行离心脱水。优选的，所述 沉淀池为圆形，其中心高、周边低，并且自中心点设置流向周边的旋涡形水渠，污水从中心 的进水管流入沉淀池，在旋涡形水渠中缓慢流动，悬浮的固体颗粒慢慢沉降，沿着沉淀池的 底部进入沉淀物搜集装置，例如污泥斗等，沉淀后的待处理水从沉4池周边溢流出去。优 选的，所述沉淀处理步骤中，在电磁场环境下完成所述沉淀处理过程；电磁场环境的强度不 限，例如，采用电磁场，使污水以垂直于磁场线的方向流经磁场，再将经所述磁场处理过的 水进行曝气处理。这样，有利于在后续处理步骤之前就提前完成大量极性离子的沉淀，提高 了工作效率，节约了污水处理成本。
[0024] 优选的，所述沉淀处理步骤之前，还执行预沉淀步骤：降低污水流速，使得污水在 进入沉淀处理系统之前，其所携带的部分较大的固体在预沉淀系统中，先行沉淀下来，然后 再进入沉淀处理系统，执行沉淀处理步骤。优选的，所述沉淀处理步骤之后，还执行过滤处 理步骤，滤去剩余的漂浮物，再进入后续处理步骤，以提高后续处理效率。
[0025] 优选的，如图2所示，所述污水处理方法中，所述厌氧处理步骤之前，还执行化学 处理步骤。所述化学处理步骤至少执行以下一种处理过程：化学沉淀、中和反应、氧化还原 反应、电解、混凝、离子交换。优选的，所述化学处理步骤顺序执行以下一种或多种处理过 程：化学沉淀、中和反应、氧化还原反应、电解、混凝、离子交换。优选的，根据污水的性质，选 择一种或多种所述处理过程。例如，对于酸性污水，采用中和反应；又如，采用聚丙烯酰胺等 絮凝剂进行所述化学处理步骤。优选的，在微波环境下完成化学处理过程。这样，可以提高 去污效果，出水中的色度、硫化物、悬浮物、B0D5、挥发酚和总磷等去除率在80%以上。
[0026] 优选的，所述污水处理方法中，所述化学处理步骤之后，所述厌氧处理步骤之前， 还再次依序执行所述沉淀处理步骤与所述过滤处理步骤。优选的，所述厌氧处理步骤之后， 所述缺氧处理步骤之前，还再次依序执行所述沉淀处理步骤与所述过滤处理步骤。优选的， 所述缺氧处理步骤之后，所述好氧处理步骤之前，还再次依序执行所述沉淀处理步骤与所 述过滤处理步骤。优选的，如图3所示，所述好氧处理步骤之后，所述消毒处理步骤之前，还 再次依序执行所述沉淀处理步骤与所述过滤处理步骤；或者，3述好氧处理步骤之后，所述 消毒处理步骤之前，还再次依序执行所述过滤处理步骤与所述沉淀处理步骤。又如，所述污 水处理方法中，所述化学处理步骤、所述厌氧处理步骤、所述缺氧处理步骤以及所述好氧处 理步骤之后，分别依序执行所述沉淀处理步骤与所述过滤处理步骤。优选的，在各沉淀处理 步骤之后，统一收集沉淀物，然后统一进行脱水，优选的，统一进行离心脱水。
[0027] 例如，所述消毒处理步骤是采用二氧化氯消毒处理；又如，所述好氧处理步骤中， 还采用臭氧催化氧化处理。
[0028] 优选的，所述污水处理方法中，所述厌氧处理步骤、所述缺氧处理步骤以及所述好 氧处理步骤中，采用搅拌结合曝气方式，增强处理物质的流动性。优选的，搅拌结合曝气方 式为搅拌同时曝气，或者，依据搅拌-曝气-搅拌-曝气-搅拌-曝气的方式进行，这样的好 处是增加了水流的可控性，避免在极端条件下发生不可控的后果，增强了安全性。优选的， 所述厌氧处理步骤、所述缺氧处理步骤以及所述好氧处理步骤的反应时间比例为1至2:1 至4:4至10。例如，所述厌氧处理步骤、所述缺氧处理步骤以及所述好氧处理步骤的反应时 间比例为1至2:1至4:4至10 ;又如，优选的，所述厌氧处理步骤、所述缺氧处理步骤以及 所述好氧处理步骤的反应时间比例为1:2:6 ;又如，所述厌氧处理步骤、所述缺氧处理步骤 以及所述好氧处理步骤的反应时间比例为1:2:8 ;又如，所述厌氧处理步骤、所述缺氧处理 步骤以及所述好氧处理步骤的反应时间比例为2:1. 5:6 ;又如，所述厌氧处理步骤、所述缺 氧处理步骤以及所述好氧处理步骤的反应时间比例为1.6:2.4:4.9 ;又如，所述厌氧处理 步骤、所述缺氧处理步骤以及所述好氧处理步骤的反应时间比例为1.8:1.2:9. 8。优选的， 根据污水水质确定所述反应时间比例，这样，能够达到更好的处理效果。
[0029] 与上述任一实施例结合应用，优选的，所述污水处理方法中，所述污水处理步骤之 前，还执行检测步骤：检测水质并分析，选择执行至少部分4述污水处理步骤。例如，采用水 质检测系统进行检测水质并分析，根据水质或水量、水温等状况及其变化，适当地设定污水 处理步骤，例如，对于化学类废水，增加或加强所述化学处理步骤的处理过程，延长处理过 程的时间等；又如，对于生活污水，则适当调整所述厌氧处理步骤、所述缺氧处理步骤以及 所述好氧处理步骤的处理方式，现有技术对于单项处理方式已经有很多案例，本发明各实 施例的侧重点是技术的组合应用、灵活设置，使得污水处理效果更好。
[0030] 又一个例子是，污水进入集水池，然后用泥浆泵抽到预沉池，执行预沉淀步骤，污 水在预沉池进行初步的固液分离，上部污水顺序自流进入沉砂池与沉淀池，完成沉淀处理 后经过滤设备进行过滤处理后进入化学处理池，完成化学处理，然后到厌氧区进行厌氧处 理、到缺氧区进行缺氧处理以及到好氧区进行好氧处理，最后到消毒区进行消毒处理后排 放。优选的，活性污泥经消毒后循环使用或者填埋；例如，在沉淀处理步骤之后，检测其中 的寄生虫种类与数量，或者检测该活性污泥的密度与孔隙，确定活性污泥的使用寿命，选择 继续使用或者消毒处理或者舍弃。优选的，所述化学处理步骤、所述厌氧处理步骤、所述缺 氧处理步骤以及所述好氧处理步骤共用一套活性污泥输入装置。又如，优选的，污水在厌氧 区、缺氧区和好氧区的停留时间分别为1. 2小时、2. 4小时与7. 2小时；沉淀区至厌氧区的 污泥回流比为25%;好氧区至缺氧区的混合液回流比为160%，这样，能够达到更好的处理效 果。
[0031] 与上述任一实施例结合应用，优选的，所述污水处理方法中，互置所述过滤处理步 骤与所述沉淀处理步骤的顺序；或者，互置所述沉淀处理步骤与所述过滤处理步骤。例如， 上述各例中，凡是顺序执行所述沉淀处理步骤与所述过滤处理步骤的处理过程，根据水质 检测分析结果，改为顺序执行所述过滤处理步骤与所述沉淀处理步骤；或者，上述各例中， 凡是顺序执行所述过滤处理步骤与所述沉淀处理步骤的处理过程，根据水质检测分析结 果，改为顺序执行所述沉淀处理步骤与所述过滤处理步骤。
[0032] 进一步地，本发明的实施例还包括，上述各实施例的各技术特征，相互组合形成的 污水处理方法。
[0033] 需要说明的是，上述各技术特征继续相互组合，形成未在上面列举的各种实施例， 均视为本发明说明书记载的范围；并且，对本领域普通技术人员来说，可以根据上述说明加 以改进或变换，而所有这些改进和变换都应属于本发明所附权利要求的保护范围。
Claims (5)
1. 一种污水处理方法，其特征在于，包括顺序执行的以下污水处理步骤：过滤处理步 骤，沉淀处理步骤，过滤处理步骤，化学处理步骤，沉淀处理步骤，过滤处理步骤，厌氧处理 步骤，缺氧处理步骤，好氧处理步骤，消毒处理步骤； 所述过滤处理步骤包括筛滤步骤：将体积大于预设值的固体漂浮物，采用预设一定大 小网眼的格栅进行筛滤，并且，采用两层格栅法执行筛滤步骤； 所述过滤处理步骤还采用生物滤池曝气法进行第二级过滤，采用生物系统完成除磷脱 氮，然后混凝后过滤； 所述沉淀处理步骤是在沉淀处理系统中，将污水中的30%以上的固体颗粒沉淀下来； 沉淀处理系统包括连通的沉砂池与沉淀池，污水先进入沉砂池，然后进入沉淀池； 所述沉淀处理步骤还包括脱水处理子步骤：对沉淀物进行脱水处理；所述脱水处理子 步骤采用离心脱水方式； 所述沉淀池为圆形，其中心高、周边低，并且自中心点设置流向周边的旋涡形水渠，污 水从中心的进水管流入沉淀池，在旋涡形水渠中缓慢流动，悬浮的固体颗粒慢慢沉降，沿着 沉淀池的底部进入沉淀物搜集装置； 所述沉淀处理步骤之前，还执行预沉淀步骤：降低污水流速，使得污水在进入沉淀处理 系统之前，其所携带的部分较大的固体在预沉淀系统中，先行沉淀下来，然后再进入沉淀处 理系统，执行沉淀处理步骤； 其中，所述化学处理步骤至少执行以下一种处理过程：化学沉淀、中和反应、氧化还原 反应、电解、混凝、离子交换。
2. 根据权利要求1所述污水处理方法，其特征在于，所述好氧处理步骤之后，所述消毒 处理步骤之前，还再次依序执行所述沉淀处理步骤与所述过滤处理步骤。
3. 根据权利要求2所述污水处理方法，其特征在于，所述厌氧处理步骤、所述缺氧处理 步骤以及所述好氧处理步骤中，采用搅拌结合曝气方式，增强处理物质的流动性。
4. 根据权利要求3所述污水处理方法，其特征在于，所述厌氧处理步骤、所述缺氧处理 步骤以及所述好氧处理步骤的反应时间比例为1-2:1-4:4-10。
5. 根据权利要求4所述污水处理方法，其特征在于，所述厌氧处理步骤、所述缺氧处理 步骤以及所述好氧处理步骤的反应时间比例为1:2: 6。
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