CN104475037A - 一种去除废水中总磷的多孔材料及其制备方法 - Google Patents

一种去除废水中总磷的多孔材料及其制备方法 Download PDF

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CN104475037A
CN104475037A CN201410726467.4A CN201410726467A CN104475037A CN 104475037 A CN104475037 A CN 104475037A CN 201410726467 A CN201410726467 A CN 201410726467A CN 104475037 A CN104475037 A CN 104475037A
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奉向东
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Rich Scientific And Technological Materials Co Ltd Of Lattice
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Abstract

本发明涉及环保技术领域,具体涉及一种去除废水中总磷的多孔材料及其制备方法,由孔径可控的多孔性材料基体构成,孔多性材料基体采用金属氧化物的混合物、无机材料及有机材料经混合、制粉、成型、干燥、烧结工艺制备而成,利用该多孔材料具有对总磷的高选择性和吸附效率高、材料本身化学稳定性好、机械强度高、使用方法简单,可以直接铺洒在过滤池之内或者装填在过滤塔柱内并且具有使用寿命长的特点,可以广泛应用于工业废水处理、矿山冶炼、电镀、电子生产、印染制衣行业中,也可应用于城市污水、河流、湖泊和其他地下水的治理,特别适用于对含总磷浓度较低的废水进行深度处理,使处理水中的总磷可以降低到0.05mg/L优于国家《地表水环境质量标准》 GB3838-2002 IV类水体标准要求。

Description

一种去除废水中总磷的多孔材料及其制备方法
技术领域
本发明属于环保技术领域,具体涉及一种去除废水中总磷的多孔材料及其制备方法。
技术背景
世界的工业化进程产生了大量的含有机磷和无机磷的工业、农业、渔业和生活液体废水。常用的生化处理难以将总磷降到目前国家规定的地表水排放标准。深度深化处理和沉淀剂常被用来进一步降低水中的总磷,但效果有限。
目前废水除磷技术大致包括两种 :
1)化学除磷法 :使磷成为不溶性固体沉淀物,从废水中分离 ;
2)生物除磷法 :使磷以溶解态被微生物所摄取,与微生物为一体,随微生物从废水中分离。
化学除磷法包括两种 :混凝沉淀法和晶析法。混凝沉淀法适宜处理总磷含量较低(小于20mg/L),且废水中悬浮物(SS)较少的二沉池出水。一般的晶析法是指向含磷废水中投加石灰,由于形成氢氧根离子,废水的 pH 值上升,与此同时,废水中的磷与石灰中的钙产生反应。实践表明,处理废水中的磷含量随pH值上升而呈对数降低之势。这两种方法较适
宜作为含有机物低、且废水中 SS 较少的深度除磷工艺,以除磷为主要目的。
生物除磷是利用聚磷菌过量地(在数量上超过其生理需要)从废水中摄取磷,并将磷以聚合物的形态贮藏在体内,形成高磷污泥,排出系统外,达到从废水中除磷的目的。简而言之就是聚磷菌在好养条件下,过量摄取磷,在厌氧条件下释放磷。
该方法总磷去除率较低,适宜处理低浓度总磷(一般小于 50mg/L)废水,需要在厌氧 - 好氧条件下进行,操作条件较复杂,需要定期(泥龄在 7 天左右)排放污泥,对有机物有一定的去除效果。
上述两种方法各有优缺点,使用时都具有一定局限性。针对高有机物浓度(COD1000~5000mg/L),高磷(TP100~500mg/L)废水,单独使用化学方法,药剂耗量大,运行成本高,有机物难以达到去除要求;单独使用生物方法,难以达到总磷、有机物去除要求,效果不好。
发明内容
针对上述存在的技术问题,本发明提供了一种去除废水总磷的多孔材料及其制备方法:本发明的技术方案如下:
一种去除废水中总磷的多孔材料的制备方法,其多孔材料由孔径可控的多孔性材料基体构成,其特征在于:所述多孔性材料基体由金属氧化物、无机材料、有机材料经下列步骤制备而成:
步骤一:将金属氧化物、无机材料、有机材料混合制浆的步骤,
步骤二:通过轧浆、捏揉或喷雾干燥将该材料制成粉末的步骤,
步骤三:将所得的粉末通过挤压机挤压成球或者机械滚动成球的步骤,
步骤四:将所得呈球状的原料进行干燥的步骤,
步骤五:将干燥后呈球状的原料进行烧结的步骤。
所述无机材料选自钾长石、膨润土、石英粉、方解石、滑石粉、石墨粉、三聚磷酸钠、煤粉、铝矾土、有机聚合物材料中的一种或多种。
所述的金属氧化物为Al2O3、 Fe2O3、 FeO、CuO、TiO2、NiO、CaO、MgO中的一种或者多种混合物。
所述的金属氧化物占原料总量1-55%(重量百分比)。
所述的有机材料为淀粉、碳粉、煤炭中一种或多种混合物。
所述的步骤五中,烧结的步骤是在500-1350℃的温度下烧结而成。
所述孔径可控的多孔性材料控制到微米或纳米。
所述孔径可控的多孔性材料控制到1-3000 nm。
所述所得多孔材料的粒径为0.1 -300mm,孔隙率为18-75%,孔径为1nm-3000 nm,比表面积为0.1-950㎡/g。
本发明与现有的技术相比,本发明的应用于去除废水中总磷的多孔材料具有对总磷的高选择性和吸附效率高、材料本身化学稳定性好、机械强度高、使用方法简单,可以直接铺洒在过滤池之内或者装填在过滤塔柱内并且具有使用寿命长的特点,可以广泛应用于工业废水处理、矿山冶炼、电镀、电子生产、印染制衣行业中,也可应用于城市污水、河流、湖泊和其他地下水的治理,特别适用于对含总磷浓度较低的废水进行深度处理,使处理水中的总磷可以降低到0.05mg/L优于国家《地表水环境质量标准》 GB3838-2002 IV类水体标准要求。
附图说明                                                                            
    图1为本发明实施例3优化组合的除磷实验装置。
    图2为优化材料组合中TP和NH3-N随过水量变化曲线的示意图。
具体实施方式
下面结合实施例,对本发明的具体实施方式作进一步详细描述。以下实施例用于说明本发明,但不用来限制本发明的范围。
实施例1
一种应用于去除废水中总磷的多孔材料的制备方法包括以下步骤:
多孔性材料基体的制备:称取氧化铝5千克、钾长石1千克、膨润土50千克、石英粉2千克、方解石0.5千克、滑石粉0.5千克、石墨粉2.5千克,再加水、球、分散剂,分散剂为三聚磷酸钠,它们配比为料∶水∶球∶分散剂=1∶0.8∶2∶0.003,然后一起放入球磨罐里面进行球磨18小时;把球磨完成的浆料过300目筛网,倒入不锈钢盘内,然后一起放入烘箱进行烘干;把干燥完成的泥粉通过挤压机进行成型成球,把球放入烘箱干燥,干燥水分低于0.8%,最后使用电炉烧成;
实施例2
多孔性材料基体的制备:称取称取CaO 1千克、氧化铝1千克、钾长石3千克、膨润土5千克、石英粉3千克、方解石1.5千克、石墨粉3.5千克,然后再加水、球,它们配比为料∶水∶球=1∶0.8∶2,一起放入球磨罐里面进行球磨18小时;把球磨完成的浆料过300目筛网,倒入不锈钢盘内,然后一起放入烘箱进行烘干;把干燥完成的泥粉通过机械滚动成球,把球放入烘箱干燥,干燥水分低于0.8%,最后使用电炉烧成。从而合成多孔材料。该多孔材料的比表面为220m2/g, 平均孔径为25nm。
本项目进水为某污水处理厂排放的尾水,
表1 进水水质表(除PH、粪大肠菌群,单位均为mg/L)
污水类型 PH CODcr BOD5 SS TP NH3-N 粪大肠菌群
进水 6~9 40 10 10 0.5ppm 5 1000个/L
称取实施例1和实施例2材料各10g,加入到350ml烧杯中,再加入200ml尾水,在150r/min的转速下搅拌4h,滤纸过滤后测量各水的氨氮和总磷(TP)。结果如表2所示。
表2 不同材料静态吸附尾水比较            单位:, mg/L 
  原水 实施例1 实施例2
NH3-N 0.26 0.24 0.23
TP 0.44 0.02 0.06
从表2数据可以看出,实施例1和实施例2材料分别对总磷的去除效果好。
实施例3
用实施例1,实施例2和实施例2材料按顺序串联如图1,每种材料填装质量分别为157g、145g、156g,在8ml/min的流量下过滤,每过滤500ml尾水后取样50ml,检测NH3-N和TP,实验装置,结果如表3。
表3 优化组合除磷除氨氮结果
对表3过滤水量及TP和NH3-N,作变化曲线图,如附图2所示,从图2可以看出,在此种优化组合情况下,对尾水中总磷和氨氮的去除均很好,在过水量达20L时,总磷和氨氮的浓度分别为0.078mg/L和0.010mg/L,远低于《地表水环境质量标准》 GB3838-2002 IV类水体要求。
以上所述仅是本发明的优选实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明技术原理的前提下,还可以做出若干改进和变型,这些改进和变型也应视为本发明的保护范围。

Claims (9)

1.一种去除废水中总磷的多孔材料的制备方法,其多孔材料由孔径可控的多孔性材料基体构成,其特征在于:所述多孔性材料基体由金属氧化物、无机材料、有机材料经下列步骤制备而成:
步骤一:将金属氧化物、无机材料、有机材料混合制浆的步骤,
步骤二:通过轧浆、捏揉或喷雾干燥将该材料制成粉末的步骤,
步骤三:将所得的粉末通过挤压机挤压成球或者机械滚动成球的步骤,
步骤四:将所得呈球状的原料进行干燥的步骤,
步骤五:将干燥后呈球状的原料进行烧结的步骤。
2.根据权利要求1所述的制备方法,其特征在于:所述无机材料选自钾长石、膨润土、石英粉、方解石、滑石粉、石墨粉、三聚磷酸钠、煤粉、铝矾土、有机聚合物材料中的一种或多种。
3.根据权利要求1所述的制备方法,其特征在于:所述的金属氧化物为Al2O3、 Fe2O3、 FeO、CuO、TiO2、NiO、CaO、MgO中的一种或者多种混合物。
4.根据权利要求3所述的制备方法,其特征在于:所述的金属氧化物占原料总量1-55%(重量百分比)。
5.根据权利要求1所述的制备方法,其特征在于:所述的有机材料为淀粉、碳粉、煤炭中一种或多种混合物。
6.根据权利要求1所述的制备方法,其特征在于:所述的步骤五中,烧结的步骤是在500-1350℃的温度下烧结而成。
7.根据权利要求1所述的制备方法,其特征在于:所述孔径可控的多孔性材料控制到微米或纳米。
8.根据权利要求7所述的制备方法,其特征在于:所述孔径可控的多孔性材料控制到1-3000 nm。
9.一种由权利要求1-8任一所述的制备方法所得的多孔材料,其特征在于:所述多孔材料的粒径为0.1 -300mm,孔隙率为18-75%,孔径为1nm-3000 nm,比表面积为0.1-950㎡/g。
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