CN102092850B - 一种mbbr处理高盐废水的填料脱膜方法 - Google Patents

一种mbbr处理高盐废水的填料脱膜方法 Download PDF

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CN102092850B
CN102092850B CN2010105748701A CN201010574870A CN102092850B CN 102092850 B CN102092850 B CN 102092850B CN 2010105748701 A CN2010105748701 A CN 2010105748701A CN 201010574870 A CN201010574870 A CN 201010574870A CN 102092850 B CN102092850 B CN 102092850B
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filler
mbbr
biofilms
soak
demoulding
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CN102092850A (zh
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任洪强
胡小兵
王钊
申战辉
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JiangSu SanQiang Environment Engineering Co Ltd
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Nanjing University
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Abstract

本发明公开了一种MBBR处理高盐废水的填料脱膜方法,属于污水处理技术领域。其步骤为:把填料从MBBR生化处理装置中捞出,自然晾干,然后将其投放到洗脱容器中;用稀盐酸浸泡,使浸泡液与填料充分混合,浸泡8~10小时后,把浸泡洗脱液与脱落的生物膜排出;再加入双氧水稀溶液浸泡,浸泡0.5~1小时,排走浸泡液与脱落的生物膜;用水压力为0.3Mpa-0.4Mpa的水冲洗填料,把已松动但没有脱落的生物膜从填料的内表面冲洗下来。本发明解决了MBBR工艺处理高盐废水时,生物膜不易脱落与更新的技术问题,使生物膜软化,减小在填料上的附着力,快速、干净地去除MBBR填料上生物膜,为生物膜的脱落更新与反应器保持稳定高效的处理能力创造了良好的条件。

Description

一种MBBR处理高盐废水的填料脱膜方法
技术领域
本发明属于污水处理技术领域,更具体的说是一种MBBR处理高盐废水的填料脱膜方法。
背景技术
移动床生物膜反应器MBBR(Moving Bed Biofilm Reactor)是一种新型的污水处理工艺,MBBR中投加一定数量的悬浮载体填料,填料内具有一定厚度的生物膜,膜内有不同种类的微生物。MBBR反应器具有很高的微生物多样性、微生物生物量和很高的处理效率。生物膜内部为厌氧环境,外部为好氧环境,硝化反应与反硝化反应作用可同时存在,具有脱氮效果。MBBR工艺处理非高盐废水时,在水力作用下,生物膜可以自然脱落与更新。
MBBR工艺应用于高盐废水处理时,由于废水中含有很高的盐份,它们不仅在填料上的生物膜微生物体内大量积累,还会以微晶的形式附着在填料的表面,这样使生物膜以类似于结垢的形式牢固地附着在填料表面上,不容易脱落。含有死亡或衰老微生物的生物膜不能脱落,新的有活性微生物膜就不能生长,生物膜不能更新,生物膜的活性越来越小,处理效果越来越差。目前对于高盐废水处理的填料脱膜的研究尚未见报到。
发明内容
1. 发明的目的
高盐废水MBBR工艺处理中的填料生物膜不能自然快速脱落,严重影响了废水处理效果。本发明提供了一种MBBR处理高盐废水的填料脱膜方法,可以快速、干净地去除MBBR填料上生物膜,为生物膜的更新创造良好的条件,使生物膜处于良好的动态平衡,生物反应器保持良好的处理效果。
2. 技术方案
一种MBBR处理高盐废水的填料脱膜方法,其步骤为:
1) 把填料从MBBR生化处理装置中捞出,自然晾干到生物膜表面没有明显水分,然后将其投放到洗脱容器中;
2)用质量百分比为0.5%~1%的稀盐酸浸泡,稀盐酸用量(体积)为填料堆积体积的1.5~2倍,一边浸泡一边搅动,使浸泡液与填料充分混合,使酸渗透到生物内部与结垢的无机物反应,溶解无机物,浸泡8~10小时后,把浸泡洗脱液与脱落的生物膜排出;
3)再加入质量百分比为0.1%~0.5%的双氧水稀溶液浸泡,用量(体积)为填料堆积体积的1.2~1.5倍,边浸泡一边搅动,使生物膜更容易从填料载体脱落下来。浸泡0.5~1小时,排走浸泡液与脱落的生物膜;
4)用水压力为0.3Mpa-0.4Mpa的水冲洗填料,把已松动但没有脱落的生物膜从填料的内表面冲洗下来。
3. 有益效果
本发明提供了一种MBBR处理高盐废水的填料脱膜方法,可以快速、完全地去除填料上的以无盐为主的、缺乏活性的生物膜,为生物膜的快速更新提供了良好条件。本方法采用常用的化学药剂,价格便宜、操作方便,有很强的操作性与实际应用价值。本方法还可以应用到高盐废水处理的其他形式填料上的脱膜,具有较广泛的应用领域。
具体实施方式
实施例1
MBBR工艺应用于维生素C生产废水的深度处理时,填料内生物膜厚达1mm,试验证明膜的自然脱落率不到5 %,高压水(水压力0.3Mpa-0.4Mpa)冲洗脱落率小于5%。应用本发明进行生物膜脱落时,先用质量百分比为1%的稀盐酸浸泡,稀盐酸用量(体积)为填料堆积体积的1.5倍,浸泡8个小时后,用质量百分比为0.1%的双氧水稀溶液浸泡,用量(体积)为填料堆积体积的1.2倍,浸泡时间0.5小时,再高压水冲洗填料。填料的脱落率达95.4%。 
实施例2
本发明方法应用于维生素B12生产废水的MBBR工艺处理,填料上生物膜厚达0.9mm,试验证明膜的自然脱落率不到2 %,高压水冲洗脱落率小于6%。应用本方法去除生物膜时,先用质量百分比为0.5%的稀盐酸浸泡,稀盐酸用量(体积)为填料堆积体积的2倍,浸泡10个小时后,用质量百分比为0.5%的双氧水稀溶液浸泡,用量(体积)为填料堆积体积的1.5,浸泡时间1小时,再高压水冲洗填料,填料的脱落率达92.6%。
实施例3
本发明方法应用于维生素B12生产废水的MBBR工艺处理,填料上生物膜厚达0.9mm,试验证明膜的自然脱落率不到2 %,高压水冲洗脱落率小于6%。应用本方法去除生物膜时,先用质量百分比为0.6%的稀盐酸浸泡,稀盐酸用量(体积)为填料堆积体积的1.8倍,浸泡8个小时后,用质量百分比为0.3%的双氧水稀溶液浸泡,用量(体积)为填料堆积体积的1.3倍,浸泡时间0.8小时,再高压水冲洗填料,填料的脱落率达92.2%。

Claims (3)

1.一种MBBR处理高盐废水的填料脱膜方法,其步骤为:
(1)把填料从MBBR生化处理装置中捞出,自然晾干到生物膜表面没有明显水分,然后将其投放到洗脱容器中;
(2)用稀盐酸浸泡,一边浸泡一边搅动,使浸泡液与填料充分混合,浸泡8~10小时后,把浸泡洗脱液与脱落的生物膜排出;
(3)再加入双氧水稀溶液浸泡,边浸泡一边搅动,浸泡0.5~1小时,排走浸泡液与脱落的生物膜;
(4)用水压力为0.3MPa-0.4MPa的水冲洗填料,把已松动但没有脱落的生物膜从填料的内表面冲洗下来。
2.根据权利要求1所述的MBBR处理高盐废水的填料脱膜方法,其特征在于稀盐酸的质量百分比浓度0.5%~1%,稀盐酸用量为填料堆积体积的1.5~2倍。
3.根据权利要求2所述的MBBR处理高盐废水的填料脱膜方法,其特征在于双氧水的浓度为0.1%~0.5%,用量为填料堆积体积的1.2~1.5倍。
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CN104591372A (zh) * 2015-02-09 2015-05-06 江苏裕隆环保有限公司 一种悬浮活性生物填料活化再生的方法和装置
CN105152310B (zh) * 2015-09-22 2017-05-10 南京大学 一种曝气生物滤池老化生物膜的原位活化方法
CN110333235B (zh) * 2019-07-15 2023-01-06 山东北方三潍环保科技有限公司 一种铁碳微电解填料是否板结检测方法

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