MLVSS / MLSS ratio’s standard value obtained from different aeration tank samples of different capacity sewage treatment plant - A case study

Ranadive Ananth Govindaraju, Gayathri Parivallal, A. Nagalingam, Sumitha Devarajan
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引用次数: 1

Abstract

Waste water treatment system plays a vital role in controlling pollution of natural water bodies like lake, pond, river etc., by Municipal and Industrial effluents. Different industrial effluents play its own role in contaminating the water bodies which in turn creates huge impact for aquatic and terrestrial life. From past studies we understood that, all the sewage treatment systems have a secondary treatment step which are mainly driven by Bacterial oxidation or in other terms can be pronounced as Biological augmentation, Biological calcification etc., In environmental engineering term this bacterial growth will be pronounced as MLSS (Mixed Liquor Suspended Solids) and MLVSS (Mixed Liquor Volatile Suspended Solids). MLVSS will be an inclusive part of the MLSS and also can be sorted as live bacterial cells which can really does the oxidation process in the secondary treatment step of Sewage treatment plant. Hence, this study was performed to evaluate the percentage or concentration of MLVSS available in the total value of MLSS. For this study aeration tank water samples were collected from 6 different STP capacities from 6 different areas. All the samples were tested for MLSS and MLVSS concentration with the available standard method of drying. Drying with 105° C in oven gives the value of MLSS and drying with 550° C in furnace gives the value of MLVSS. With all the tested samples the concentration of MLVSS from the total MLSS was evaluated and standardized.
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从不同容量污水处理厂不同曝气池样品中获得的MLVSS / MLSS比率标准值-个案研究
污水处理系统在控制城市和工业污水对湖泊、池塘、河流等自然水体的污染方面起着至关重要的作用。不同的工业废水在污染水体方面发挥着各自的作用,这反过来又对水生和陆地生物造成巨大影响。从过去的研究中我们了解到,所有的污水处理系统都有一个主要由细菌氧化驱动的二级处理步骤,或者用其他术语来说,可以读为生物增强,生物钙化等,在环境工程术语中,这种细菌生长将被读为MLSS(混合液悬浮固体)和MLVSS(混合液挥发性悬浮固体)。MLVSS将是MLSS的一个组成部分,也可以作为活的细菌细胞进行分类,在污水处理厂的二级处理步骤中真正进行氧化过程。因此,本研究旨在评估MLVSS在MLSS总价值中可用的百分比或浓度。在本研究中,从6个不同地区的6个不同STP容量的曝气池中收集了水样。用现有的标准干燥法测定样品的MLSS和MLVSS浓度。105°C烘箱干燥得到MLSS值,550°C炉干燥得到MLVSS值。对所有被测样品的总MLSS中MLVSS的浓度进行评估和标准化。
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