CN105854840A - 一种生物滴滤池用滤料改性方法 - Google Patents
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Abstract
本发明公开一种生物滴滤池用滤料改性方法,包括:(1)预处理:用清水将滤料冲洗干净,并将所述滤料浸泡于吸附剂粉末溶液中,浸泡过程中溶液不停搅动翻滚,持续时间5小时以上,最后,取出晾干、备用;(2)涂覆液制备:按制膜液组成将极性溶剂、高分子聚合物、致孔剂依次加入搅拌釜内,调节温控表温度为80℃,在一定转速下搅拌4‑5小时制成涂覆液。然后静置6小时,脱泡;(3)滤料改性:将晾干的滤料瞬时浸没涂覆液中,即时取出,取出后立刻浸没于水中。涂覆液立刻固化成型,在滤料表面形成白色包裹层,表示滤料表面改性完成。该方法滤料表面涂覆改性,不改变滤料的结构,且操作简单,易于工业化生产。
Description
技术领域
本发明属于废气处理技术领域,具体涉及一种生物滴滤池用滤料改性方法。
背景技术
作为一种有前途的有机废气处理技术,生物滴滤池法已经获得了广泛的实验室小试及中试研究,结果表明,生物滴滤池可以用来处理难降解挥发性有机气体。但总体上看,由于启动时间、停留时间过长等原因,工业有机废气生物滴滤池处理工程应用受限,为解决上述问题需要结合化学、材料、微生物、分子生物学等学科领域的研究成果,通过改善填料的传质性能,可以提高生物滴滤池的工程实用性。
生物滴滤池虽然具有以下优点:可靠性较高;耐冲击负荷;可持续性好;能耗低;维护和运行简便;处理效果较好,适合于小生物群落的存活。但由于营养物质的持续供给,生物量不断积累最终会导致生物滴滤池填料的堵塞,这是影响生物滴滤池能否长期稳定运行的一个关键因素,在国内外引起了广泛重视。
总的来说,生物滴滤池滤料对废气中的有机物就是一个吸附-释放-生物降解的过程,如果能延缓第一阶段的过程,就可以减缓微生物的生长,控制生物量可以减缓滴滤池的堵塞现象。此外,如果可以使滤料表面更加光滑,微生物在其表面附着生长的难度也就越大,也可以控制生物膜的厚度。
发明内容
本发明的目的包括提供一种生物滴滤池用滤料改性方法,该方法不改 变滤料的结构,且操作简单,易于工业化生产。
具体地,本发明提供一种生物滴滤池用滤料改性方法,包括以下步骤:
(1)预处理:用清水将滤料冲洗干净,并将所述滤料浸泡于吸附剂粉末溶液中,浸泡过程中溶液不停搅动翻滚,持续时间5小时以上,最后,取出晾干、备用。
(2)涂覆液制备:按制膜液组成将极性溶剂、高分子聚合物、致孔剂依次加入搅拌釜内,调节温控表温度为80℃,在一定转速下搅拌4-5小时制成涂覆液。然后静置6小时,脱泡。
(3)滤料改性:将晾干的滤料瞬时浸没涂覆液中,即时取出,取出后立刻浸没于水中。涂覆液立刻固化成型,在滤料表面形成白色包裹层,表示滤料表面改性完成。
优选地,所述步骤(1)中滤料为无机滤料颗粒,所述无机滤料颗粒为火山岩颗粒、页岩陶粒和/或粘土陶粒,其颗粒平均粒径为5mm~5cm。
优选地,所述步骤(1)中的吸附剂粉末溶液为活性炭粉末溶液,所述活性炭粉末颗粒平均粒径不大于5μm,所述活性炭粉末浓度为3%~10%。
优选地,所述步骤(2)中的极性溶剂为N,N—二甲基甲酰胺、N,N—二甲基乙酰胺和/或二甲基亚砜。
优选地,所述步骤(2)中的高分子聚合物为聚偏氟乙烯树脂、聚醚砜、聚砜、聚丙烯晴或聚氯乙烯,其分子量1~10万,所述高分子聚合物在涂覆液中的含量为5~8%。
优选地,所述步骤(2)中的致孔剂为聚乙烯醇或聚乙二醇,其分子量500~2000,添加剂的含量0.5~1%。
优选地,所述步骤(2)中的致孔剂为吐温-80,添加剂的含量0.5~1%。
优选地,所述高分子聚合物涂覆层厚度约为0.1~0.5mm,表面微孔的平均孔径为5~20μm。
本发明实施例所提供的生物滴滤池用滤料改性方法,该改性滤料在处理有机废气和生物除臭过程中,增加了滤料的吸附性能,强化了废气从滤料表面与内部多孔结构的传质的过程,同时滤料表面更加光滑,减少生物膜的在表面的生长量。在使用过程中只要增加水喷淋强度,可将生物膜冲洗脱落,克服了滤料堵塞造成滴滤池阻力增加的问题。
具体实施方式
为更进一步阐述本发明为达成预定目的所采取的技术手段及功效,以下结合实施例,对依据本发明提出的一种生物滴滤池用滤料改性方法的具体实施方式、方法、步骤、结构、特征及功效,详细说明如后。
实施例1
(1)预处理:将平均粒径为1cm的火山岩滤料颗粒用清水冲洗干净,在质量浓度为8%活性炭粉末(颗粒粒径0.5μm)溶液中浸泡,浸泡过程中溶液不停搅动翻滚,持续6h,取出晾干。
(2)涂覆液制备:按制膜液组成将溶剂(N,N—二甲基甲酰胺与N,N—二甲基乙酰胺按1:1混合)、聚砜(MW=50000)、吐温-80依次加入搅拌釜内,聚砜和吐温-80的质量浓度分别为5%和1%,调节温控表温度为80℃,在一定转速下搅拌4小时制成制涂覆液。然后静置6小时,脱泡。
(3)滤料改性:将晾干的无机滤料颗粒瞬时完全浸入涂覆液中,立即取出,取出后立刻浸没于水中。涂覆液立刻固化成型,在无机滤料表面形成白色包裹层,表示无机颗粒滤料表面改性完成。
实施例2
(1)预处理:将平均粒径为3cm的页岩陶粒滤料颗粒用清水冲洗干净,在质量浓度为5%活性炭粉末(颗粒粒径2μm)溶液中浸泡,浸泡过程中溶液不停搅动翻滚,停留8h,取出晾干。
(2)涂覆液制备:按制膜液组成将N,N—二甲基甲酰胺、聚偏氟乙烯(MW=20000)、聚乙二醇2000依次加入搅拌釜内,聚偏氟乙烯和聚乙二醇2000的质量浓度分别为6%和0.5%,调节温控表温度为80℃,在一定转速下搅拌4小时制成制涂覆液。然后静置6小时,脱泡。
(3)滤料改性:将晾干的无机滤料颗粒瞬时完全浸入涂覆液中,立即取出,取出后立刻浸没于水中。涂覆液立刻固化成型,在无机滤料表面形成白色包裹层,表示无机颗粒滤料表面改性完成。
实施例3
(1)预处理:将平均粒径为5mm的火山岩和粘土陶粒滤料颗粒用清水冲洗干净,在质量浓度为18%活性炭粉末(颗粒粒径0.1μm)溶液中浸泡,浸泡过程中溶液不停搅动翻滚,持续5h,取出晾干。
(2)涂覆液制备:按制膜液组成将N,N—二甲基乙酰胺、聚偏氟乙烯树脂、聚乙烯醇依次加入搅拌釜内,聚偏氟乙烯树脂和聚乙烯醇的质量浓度分别为8%和0.5%,调节温控表温度为80℃,在一定转速下搅拌4小时制成制涂覆液。然后静置6小时,脱泡。
(3)滤料改性:将晾干的无机滤料颗粒瞬时完全浸入涂覆液中,立即取出,取出后立刻浸没于水中。涂覆液立刻固化成型,在无机滤料表面形成白色包裹层,表示无机颗粒滤料表面改性完成。
实施例4
(1)预处理:将平均粒径为5cm的火山岩、页岩和粘土陶粒混合物滤料颗 粒用清水冲洗干净,在质量浓度为3%活性炭粉末(颗粒粒径3μm)溶液中浸泡,浸泡过程中溶液不停搅动翻滚,持续12h,取出晾干。
(2)涂覆液制备:按制膜液组成将溶剂(N,N—二甲基乙酰胺与二甲基亚砜按1:1混合)、聚氯乙烯、聚乙二醇依次加入搅拌釜内,聚偏氟乙烯树脂和聚乙烯醇的质量浓度分别为7%和0.8%,调节温控表温度为80℃,在一定转速下搅拌4小时制成制涂覆液。然后静置6小时,脱泡。
(3)滤料改性:将晾干的无机滤料颗粒瞬时完全浸入涂覆液中,立即取出,取出后立刻浸没于水中。涂覆液立刻固化成型,在无机滤料表面形成白色包裹层,表示无机颗粒滤料表面改性完成。
本发明实施例提供一种生物滴滤池用滤料改性方法,该方法首先在滤料内部强化无机滤料的吸附容量,通过相转化的方式使疏水性高分子聚合物在滤料颗粒形成光滑、具有致密小孔的表面,保证滤料内部的强吸附物质不流失。该无机颗粒滤料表面的高分子聚合物涂覆层厚度约为0.1~0.5mm,表面微孔的平均孔径为5~20μm。在使用过程中,滤料由于具有致密多孔的表面,吸附的VOC通过扩散的方式进入滤料内部,滤料内部的吸附剂与多孔结构可以让厌氧微生物附着生长,且厌氧状态可以保持生物量低增长速率,分解VOC所产生的水和二氧化碳等物质又通过扩散方式至滤料外部。该方法既强化了滤料内部的吸附能力和微生物附着生长,同时滤料表面更加光滑,减少微生物在滤料表面的附着。
以上所述,仅是发明的较佳实施例而已,并非对本发明作任何形式上的限制,虽然本发明已以较佳实施例揭露如上,然而并非用以限定本发明,任何熟悉本专业的技术人员,在不脱离本发明技术方案范围内,当可利用上述揭示的技术内容作出些许更动或修饰为等同变化的等效实施例,但凡是未脱离本 发明技术方案内容,依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与修饰,均仍属于本发明技术方案的范围内。
Claims (8)
1.一种生物滴滤池用滤料改性方法,其特征在于,包括以下步骤:(1)预处理:用清水将滤料冲洗干净,并将所述滤料浸泡于吸附剂粉末溶液中,浸泡过程中溶液不停搅动翻滚,持续时间5小时以上,最后,取出晾干、备用;(2)涂覆液制备:按制膜液组成将极性溶剂、高分子聚合物、致孔剂依次加入搅拌釜内,调节温控表温度为80℃,在一定转速下搅拌4-5小时制成涂覆液,然后静置6小时,脱泡;(3)滤料改性:将晾干的滤料瞬时浸没涂覆液中,即时取出,取出后立刻浸没于水中;涂覆液立刻固化成型,在滤料表面形成白色包裹层,表示滤料表面改性完成。
2.根据权利要求1所述的生物滴滤池用滤料改性方法,其特征在于,所述步骤(1)中滤料为无机滤料颗粒,所述无机滤料颗粒为火山岩颗粒、页岩陶粒和/或粘土陶粒,其颗粒平均粒径为5mm~5cm。
3.根据权利要求1所述的生物滴滤池用滤料改性方法,其特征在于,所述步骤(1)中的吸附剂粉末溶液为活性炭粉末溶液,所述活性炭粉末颗粒平均粒径不大于5μm,所述活性炭粉末浓度为3%~10%。
4.根据权利要求1所述的生物滴滤池用滤料改性方法,其特征在于,所述步骤(2)中的极性溶剂为N,N—二甲基甲酰胺、N,N—二甲基乙酰胺和/或二甲基亚砜。
5.根据权利要求1所述的生物滴滤池用滤料改性方法,其特征在于,所述步骤(2)中的高分子聚合物为聚偏氟乙烯树脂、聚醚砜、聚砜、聚丙烯晴或聚氯乙烯,其分子量1~10万,所述高分子聚合物在涂覆液中的含量为5~8%。
6.根据权利要求1所述的生物滴滤池用滤料改性方法,其特征在于,所述步骤(2)中的致孔剂为聚乙烯醇或聚乙二醇,其分子量500~2000,添加剂的含量0.5~1%。
7.根据权利要求1所述的生物滴滤池用滤料改性方法,其特征在于,所述步骤(2)中的致孔剂为吐温-80,添加剂的含量0.5~1%。
8.根据权利要求5所述的生物滴滤池用滤料改性方法,其特征在于,所述高分子聚合物涂覆层厚度约为0.1~0.5mm,表面微孔的平均孔径为5~20μm。
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CN113713605A (zh) * | 2021-09-03 | 2021-11-30 | 常州翡尔达环保科技有限公司 | 一种空气净化生物过滤滤料颗粒及其制备方法和用途 |
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