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厌氧序批式生物膜反应器应用于个人护理行业废水处理:有机负荷和填充时间的影响。

AnSBBR applied to the treatment of wastewater from a personal care industry: effect of organic load and fill time.

作者信息

de Oliveira Daniela Sotirchos, Prinholato Ana Claudia, Ratusznei Suzana Maria, Rodrigues José Alberto Domingues, Zaiat Marcelo, Foresti Eugênio

机构信息

Escola de Engenharia Mauá, Instituto Mauá de Tecnologia (EEM/IMT), Departamento de Engenharia Quimica e de Alimentos, Praça Mauá 1, CEP 09 580-900, São Caetano do Sul, SP, Brazil.

出版信息

J Environ Manage. 2009 Jul;90(10):3070-81. doi: 10.1016/j.jenvman.2009.04.019. Epub 2009 Jun 3.

Abstract

The objective of this work was to study the technological feasibility of treating wastewater from a personal care industry (PCI-WW) in a mechanically stirred anaerobic sequencing batch biofilm reactor (AnSBBR) containing immobilized biomass on polyurethane foam. An assessment was made on how system efficiency and stability would be affected by: increasing organic load; supplementation of nutrients and alkalinity; and different feed strategies. The AnSBBR operated with 8-h cycles, stirring speed of 400 rpm, temperature of 30 degrees C, and treated with 2.0 L wastewater per cycle. First the efficiency and stability of the AnSBBR were studied when submitted to an organic loading rate (OLR) of 3.1-9.4 gCOD/(L d), and when the PCI-WW was supplemented with nutrients (sucrose, urea, trace metals) and alkalinity. The AnSBBR was shown to be robust and presented stability and removal efficiency exceeding 90%. At an OLR of 12.0 gCOD/(L d) efficiency became difficult to maintain due to the presence of commercial cleansers and disinfectants in the wastewater lots. In a subsequent stage the AnSBBR treated the wastewater supplemented with alkalinity, but with no nutrients at varying feed strategies and maintaining an OLR of approximately 9.0 gCOD/(L d). The first strategy consists of feeding 2.0 L of the influent batchwise [OLR of 9.4 gCOD/(L d)]. In the second 1.0 L of influent was fed-batchwise and an additional 1.0 L was fed fed-batchwise [OLR of 9.2 gCOD/(L d)], i.e., in relation to the first strategy the feed volume was maintained but supplied in different periods. In the third strategy 1.0 L of treated effluent was maintained in the reactor and 1.0 L of influent was fed fed-batchwise [OLR of 9.0 gCOD/(L d)], i.e., in relation to the first strategy the feed volume was different but the feed period was the same and the OLR was maintained by increasing the influent concentration. Comparison of the first and second strategies revealed that organic matter removal efficiency was unaffected (exceeding 90%). The third strategy resulted in a reduction in average removal efficiency from 91 to 83% when compared to the first one. A kinetic study resulted in first order kinetic parameters ranges from 0.42 to 1.46 h(-1) at OLRs from 3.1 to 12.0 gCOD/(L d), respectively, and the second feed strategy [OLR of 9.2 gCOD/(L d)] was shown to be the most favorable.

摘要

这项工作的目的是研究在一个机械搅拌的厌氧序批式生物膜反应器(AnSBBR)中处理个人护理行业废水(PCI-WW)的技术可行性,该反应器中聚氨酯泡沫上固定有生物质。评估了以下因素对系统效率和稳定性的影响:增加有机负荷;补充营养物质和碱度;以及不同的进料策略。AnSBBR以8小时的周期运行,搅拌速度为400转/分钟,温度为30摄氏度,每个周期处理2.0升废水。首先,研究了AnSBBR在有机负荷率(OLR)为3.1-9.4克化学需氧量/(升·天)时,以及当PCI-WW补充了营养物质(蔗糖、尿素、微量金属)和碱度时的效率和稳定性。结果表明,AnSBBR性能强劲,稳定性和去除效率超过90%。当OLR为12.0克化学需氧量/(升·天)时,由于废水批次中存在商业清洁剂和消毒剂,难以维持效率。在随后的阶段,AnSBBR处理补充了碱度但未添加营养物质的废水,采用不同的进料策略,并维持约9.0克化学需氧量/(升·天)的OLR。第一种策略是分批进料2.0升进水[OLR为9.4克化学需氧量/(升·天)]。第二种策略是分批进料1.0升进水,然后再分批进料额外的1.0升进水[OLR为9.2克化学需氧量/(升·天)],即与第一种策略相比,进料量保持不变,但在不同时间段供应。第三种策略是在反应器中保留1.0升处理后的出水,并分批进料1.0升进水[OLR为9.0克化学需氧量/(升·天)],即与第一种策略相比,进料量不同,但进料时间段相同,通过提高进水浓度维持OLR。第一种和第二种策略的比较表明,有机物去除效率不受影响(超过90%)。与第一种策略相比,第三种策略导致平均去除效率从91%降至83%。动力学研究得出,在OLR为3.1至12.0克化学需氧量/(升·天)时,一级动力学参数范围分别为0.42至1.46小时-1,第二种进料策略[OLR为9.2克化学需氧量/(升·天)]被证明是最有利的。

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