共查询到20条相似文献,搜索用时 156 毫秒
1.
2.
3.
4.
5.
6.
应用磁化效应提高含酚废水处理效果 总被引:11,自引:0,他引:11
探讨了新磁化效应与工业含酚废水的处理过程相结合,使含酚废水经过微弱磁场的磁化后,再运用絮凝氧化法进行处理的新途径,并研究了磁化效应在不同条件下对含酚废水处理效果的影响规律。实验研究结果表明,应用磁化技术能够明显地改善絮凝氧化法处理含酚废水的效果,提高去酚率。 相似文献
7.
8.
9.
工业含酚废水毒性高,对环境危害大,研究和开发高效经济的含酚废水处理技术受到了广泛的关注。文章研究利用膜生物处理器的优势,尝试处理高浓度含酚废水。实验结果表明:在经过16 d驯化后,MBR完全可以在苯酚浓度约为450 mg/L的条件下正常运行,而且CODCr的去除率达到94.62%,达标排放。 相似文献
10.
11.
为了考察生物流化床处理乙二醇废水的效果,把进入氧化沟前的乙二醇生产废水引入生物流化床中进行处理,并与氧化沟的处理效果进行对比。试验结果表明,生物流化床和氧化沟的HRT分别为15和70 h,CODCr平均去除率分别为85%和77%,去除容积负荷分别为4.16和2.85 kg/(m3.h)。单级流化床工艺出水CODCr的质量浓度大于60 mg/L,而两级串联生物流化床处理后的出水CODCr的质量浓度小于60 mg/L,平均去除率为96%,平均去除容积负荷为4.56 kg/(m3.h)。当进水水质波动范围较大时,生物流化床处理工艺比氧化沟具有更强的抗冲击负荷能力,出水水质更加稳定。 相似文献
12.
Wongsarivej Pratarn Tongprem Pornsiri Swasdisevi Thanit Charinpanitkul Tawatchai Tanthapanichakoon Wiwut 《中国化学工程学报》2011,19(1):76-82
A three phase fluidized bed reactor was used to investigate the combined effect of adsorption and oxidation for phenolic wastewater treatment.Aqueous solutions containing 10 mg·L 1of phenol and ozone were continuously fed co-currently as upward flow into the reactor at constant flow rate of 2 and 1 L·min1,respectively.The phenolic treatment results in seven cases were compared:(a)O3 only,(b)fresh granular activated carbon(GAC),(c) 1st reused GAC,(d)2nd reused GAC,(e)fresh GAC enhanced with O3,(f)1st reused GAC enhanced with O3,and (g)2nd reused GAC enhanced with O3.The phenolic wastewater was re-circulated through the reactor and its concentration was measured with respect to time.The experimental results revealed that the phenolic degradation using GAC enhanced with O3 provided the best result.The effect of adsorption by activated carbon was stronger than the effect of oxidation by ozone.Fresh GAC could adsorb phenol better than reused GAC.All cases of adsorption on GAC followed the Langmuir isotherm and displayed pseudo second order adsorption kinetics.Finally,a differential equation for the fluidized bed reactor model was used to describe the phenol concentration with respect to time for GAC enhanced with O3.The calculated results agree reasonably well with the experimental results. 相似文献
13.
工业进程的加快导致含氟废水逐年增加,对生物和环境造成极大危害,含氟废水的高效环保处理方法成为世界各国研究的热点。阐述了含氟废水的多种处理方法,包括:沉淀法、电化学法、吸附法、离子交换树脂法及微生物除氟法等。综述了中国最新的废水除氟专利技术方法,包括:流化床结晶法、以碳酸钙和氢氧化钙混合物为沉淀剂的沉淀法、以精馏釜-填料精馏塔-冷凝器-贮液器等设备组成的精馏系统的精馏法、以表面包覆有含氯-铝离子结构的氨基膦酸化合物的螯合树脂吸附法、以阴离子交换树脂与金属锂铝形成的杂化材料的离子交换法、电凝聚-吸附法、强化镁沉淀法等。指出在实际的含氟废水处理过程中,需针对不同性质的废水采取适当的方法。 相似文献
14.
15.
16.
17.
通过对PET废水三级生化处理的实践,总结出了一些实际经验。再结合新型三相生物流化床,使得污水处理达到国家一级排放标准。 相似文献
18.
《Separation and Purification Technology》2002,26(2-3):295-304
Adsorption capacity and bioactivity of a novel mesoporous activated carbon (IIT Carbon) and bioactive (BACIIT) catalyst produced from papermill sludge were evaluated. Conversion of paper mill sludge to useful activated carbons and biocatalysts is a significant process since it reduces environmental problems associated with disposal of waste sludge, enhances wastewater treatment using carbons produced from industrial waste itself, and promotes conservation of the naturally available primary resources currently used to make activated carbons. Analysis was conducted using synthetic wastewater containing phenol and a commercially available activated carbon, sorbonorite 4 (used as reference carbon). Phenol removal was accomplished in batch and fluidized bed reactors containing mesoporous activated carbon, sorbonorite 4, and the produced bioactive catalysts. Isotherm adsorption data indicated that mesoporous activated carbon has a higher adsorption capacity and molecular surface coverage than sorbonorite 4 for phenol concentrations less than 10 mg/l. The mass transfer limitation was accounted for the lower adsorption capacity of the microporous carbon (sorbonorite 4) in dilute solutions. The fluidized bed reactor study, however, indicated similar but slightly lower phenol removal capability for the produced mesoporous carbon. While phenol removal efficiency of the carbons studied was in the range 65–70%, the produced bioactive catalysts were able to remove up to 97% of phenol during first few hours of operation. These results suggest that mesoporous carbon will feasibly be a good substitute for other commercially available activated carbons produced from natural resources, not only in physical adsorption processes, but also in fluidized bed bioreactors (FBB), used in biodegradation processes. 相似文献
19.
20.
针对前期研究开发的新型三重环流与多重环流流化床,构建气液两相流的二维数值模型,分析微观流场、液体运动速度和气相含率,剖析环流数对流化床流体力学特性的影响和对内循环过程的改善,寻找反应器运行过程节能的结构与优化的操作条件。通过数值模拟发现:基于单重环流,多重环流作用主要改变流体在上升区和下降区之间的相互混合和交汇,增大环流数可缩短流体运动的循环路程和时间,有利于加强相际之间的混合,但床内整体流态仍接近推流,微循环的存在所占比例较小;多重环流流化床的流体力学性能优于三重环流,随着环流次数的增多,液速在径向和轴向上分布更均匀,气泡逆流进入下降区,有利于反应器整体氧传质效率的提高。通过流化床结构改变实现的流体重构支持流体力学性能的改善,是高负荷有机废水好氧生物处理期待选择的开发方向。 相似文献