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A novel integrated ozone-SBR-ozone process for treatment of baker’s yeast wastewater

机译：一种新型的臭氧-SBR-臭氧综合处理工艺，用于处理面包酵母废水

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The wastewater which released from fermentation industries containing a high organic matter with a dark color is the major source of soil and aquatic pollution. The aim of this study was to evaluate an integrated ozonation and sequencing batch reactor (SBR) processes for the treatment of molasses wastewater. This study was conducted in three series (pre-ozonation, SBR, and post-ozonation) glass reactor. While pre-and post-ozonation reactors were operated with ozone doses from 0.1 to 1 gO(3)/g COD, and for SBR, hydraulic detention times (HRT) of 12-60 h were used. Different pH from 7.5 to 11 was examined in the process. According to the results, pre-ozonation of baker's yeast wastewater with optimum operational conditions of ozone dose of 0.6 gO(3)/g COD and pH 10.5, has removed 31.74% and 88.31% COD and color, respectively. In the SBR process, maximum COD removal rate (52%) was achieved during 36 h aeration time. Due to increasing readily biodegradable intermediate compounds in pre-ozonation step, the ratio of the BOD5/COD was increased from 0.37 to 0.59 in the next biological reactor. In addition, optimum ozone concentration in post-ozonation step was obtained 0.5 gO(3)/g COD. The overall removal efficiencies of COD and color in whole operational status for the combination process of ozone-SBR-ozone were obtained 80% and 88%, respectively. This process might be suitable for treating high strength baker's yeast wastewater in terms of COD and color removal.
机译：从发酵工业中释放出来的废水中，有机物含量高且颜色深，是土壤和水生污染的主要来源。这项研究的目的是评估一个一体化的臭氧氧化和测序间歇反应器（SBR）工艺来处理糖蜜废水。这项研究是在三个系列（臭氧化前，SBR和臭氧化后）玻璃反应器中进行的。臭氧化前后的反应器以0.1至1 gO（3）/ g COD的臭氧剂量运行，而对于SBR，水力滞留时间（HRT）为12-60 h。在此过程中检查了7.5至11的不同pH。根据结果​​，在最佳操作条件下，臭氧剂量为0.6 gO（3）/ g COD和pH为10.5的面包酵母废水进行预臭氧处理，分别去除了31.74％和88.31％的COD和颜色。在SBR工艺中，在36 h的通气时间内，最大的COD去除率（52％）得以实现。由于在预臭氧化步骤中增加了易于生物降解的中间化合物，因此在下一个生物反应器中，BOD5 / COD的比例从0.37增加到0.59。此外，在臭氧化后步骤中的最佳臭氧浓度为0.5 gO（3）/ g COD。在臭氧-SBR-臭氧结合过程中，在整个操作状态下，COD和颜色的总去除效率分别为80％和88％。就COD和脱色而言，该方法可能适合处理高强度面包酵母废水。

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