CN1226515A - 焦化废水中氨氮脱除方法 - Google Patents

焦化废水中氨氮脱除方法 Download PDF

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CN1226515A
CN1226515A CN 98106505 CN98106505A CN1226515A CN 1226515 A CN1226515 A CN 1226515A CN 98106505 CN98106505 CN 98106505 CN 98106505 A CN98106505 A CN 98106505A CN 1226515 A CN1226515 A CN 1226515A
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nitrogen
ammonia
removing ammonia
wastewater
waste water
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CN 98106505
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CN1110456C (zh
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张昌鸣
窦秀云
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Shanxi Institute of Coal Chemistry of CAS
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Shanxi Institute of Coal Chemistry of CAS
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Abstract

一种焦化废水中氨-氮的脱除方法,包括用含有25%左右的次氯酸钙的漂白粉作脱除剂,经浸渍与过滤液固分离,可得到含氨-氮15mg/L以下的,达到国家一级排放标准的废水。本发明系统设备投资少,运行费用低,操作简便。

Description

焦化废水中氨氮脱除方法
本发明涉及一种焦化废水氨氮的脱除方法。
国内焦化厂采用普通生化法处理后的污水中,氨氮的含量尚未达到国家规定的排放标准,进一步的处理方法多采用生物硝化一反硝化法(如上海宝钢焦化厂),但此法系统投资费用及设备运转费用都十分昂贵,大多数焦化厂难以采用。
本发明的目的在于开发一种投资少,运转费用低的焦化废水中氨氮脱除方法。
本发明的主要技术特征是采用含次氯酸钙25%的市售漂白粉末作为脱除剂,先浸渍吸附后,过滤分离,所得废水的氨氮含量达到国家排放标准,所得废渣供填地之用。
本发明的实施步骤如下:
取一定量的焦化厂焦化废水,加入一定量的脱除剂,搅动,静置浸渍30分钟,过滤,分别测定处理前后水样中NH3-N的含量,实验条件及实验结果列在表1。
表1
 编号1   投剂量g/100ml0.80 原NH3-N浓度mg/L701.03   脱除后浓度mg/L16.35   净化效率%97.67 单位脱除剂脱NH3-N量mg/g85.59
 2     0.75  707.99     14.93     97.89     92.41
 3     0.80  719.10     6.31     99.12     89.10
 4     0.70  627.15     19.35     96.91     86.52
 5     0.60  600.08     19.92     96.68     98.69
 6     0.30  515.70     259.70     49.63     85.33
 7     0.57  515.70     17.23     96.66     87.45
 8     0.15  257.41     110.35     57.13     98.04
 9     0.22  298.20     59.69     79.98     108.41
 10     0.22  298.20     69.51     77.90     105.54
 11     0.16  105.00     15.40     85.33     56.00
 12     0.16  91.80     9.86     89.24     51.09
NH3-N的测定采用比色法,测定仪采用国产721紫外光光度计。
国家一级排放标准氨-氮含量为15mg/L,二级排放氨氮含量≤25mg/L,由上表可知,对于不同的NH3-N含量的废水,改变投剂量,可达到上述的国家标准。
以实验结果,作回归法计,达到国家规定的一级排放标准NH3-N≤15mg/L)、二级标准(NH3-N≤25mg/L),脱除剂投量及相应的费用列于表2。
原NH3-N浓度mg/L     一级新建企业(15mg/L)
投剂量(g/L) 元/吨(水)
    700     7.69     8.00
    600     6.39     4.98
    500     5.61     4.38
    400     4.14     3.23
    300     2.67     2.08
    200     1.89     1.47
    100     1.29     1.01
 146.67*     1.57     1.22
由上可知,脱NH3-N所用脱除剂的费用很低,为了进一步说明现有技术硝化-反硝化法与本发明方法在投资及运行费用的差别,以处理100吨/时焦化废水,使NH3-N含量都达到国家一级排放标准为比较的基准,所得结果如下:
1.硝化-反硝化法
运行费用:1900~2000万元/年
系统投资:1100万元
2.本发明:
运行费用:420~430万元/年
设备投资:620万元
综上所述,本发明显而易见的优点是:
(1)本发明的投资约为硝化-反硝化法的1/2,运转费用为其1/4~1/5。
(2)本发明操作简单,仅需浸渍与过滤分离两步即可。

Claims (2)

1.一种焦化废水中氨氮的脱除方法,其特征是先采用脱除剂浸渍,后过滤液固分离。
2.如权利要求1所述的方法,其特征在于所述的脱除剂为含次氯酸钙25%左右的市售漂白粉。
CN 98106505 1998-02-20 1998-02-20 焦化废水中氨氮脱除方法 Expired - Fee Related CN1110456C (zh)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1301777C (zh) * 2004-02-13 2007-02-28 中国石油化工股份有限公司 延迟焦化废水过滤工艺及装置
CN100343184C (zh) * 2005-12-09 2007-10-17 汪承保 一种氨氮去除剂
CN102432120A (zh) * 2011-10-31 2012-05-02 崇义章源钨业股份有限公司 一种钨冶炼离子交换工艺废水的综合净化方法
CN103086497A (zh) * 2011-10-28 2013-05-08 武汉科技大学 利用次氯酸钙深度处理焦化废水的方法

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1301777C (zh) * 2004-02-13 2007-02-28 中国石油化工股份有限公司 延迟焦化废水过滤工艺及装置
CN100343184C (zh) * 2005-12-09 2007-10-17 汪承保 一种氨氮去除剂
CN103086497A (zh) * 2011-10-28 2013-05-08 武汉科技大学 利用次氯酸钙深度处理焦化废水的方法
CN102432120A (zh) * 2011-10-31 2012-05-02 崇义章源钨业股份有限公司 一种钨冶炼离子交换工艺废水的综合净化方法

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