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【研究・論文】下水処理へのEM活用により、BOD、COD、透明度、臭気が劇的に改善
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    Laboratory Scale Bioremediation of the Yamuna Water with Effective Microbes (EM) Technology and Nanotechnology
    J.N Shrivastava*, Nupur Raghav and Abha Singh
    Department of Botany, Microbiology Laboratory, DEI, Dayalbagh, Agra, India



    Abstract
    In present study, Yamuna water sample was tested and treated with EM technology (bacterial monocultures) and Nanotechnology (AgNO3 synthesized bacterial monocultures). After treatment, a sharp reduction was observed in all the physical and chemical parameters in the sample throughout the investigations. The bacterial monocultures 
    treated water sample showed a sharp reduction in BOD i.e. 60-85% and 50-80% in COD while AgNO3 synthesized bacterial monocultures showed 85-95% reduction in BOD and 25-45% reduction in COD. The study concludes that both the technologies (EM technology and Nanotechnology) were effective in the reduction of water impurities but EM technology was more effective in reducing chemical pollutants to the permissible limits in comparison to the nanotechnology, while nanotechnology reduced biological contaminants more than EM technology. Through the results presented here it was shown that if good stable and effective waste water treatment is achieved, then waste water reused become increasingly safe.

    Results and Discussion
    The physico-chemical characteristics of Yamuna water before treatment is presented in Table 1.The untreated water sample was dark yellowish in colour, foul odour, alkaline in nature (7.8), with high TDS (16.782 mg L-1), TSS (5.822 mg L-1), DO (4 mg L-1), BOD (8.24 mg L-1) and COD (43.4 mg L-1). After EM treatment, all the parameters showed sharp reduction i.e. colourless, odourless, pH value ranged from 6.8-7.5, TDS (3.31-16.5 mg L-1), (Table 2) DO (10-11.2 mg L-1), 
    BOD (1.6-6.4 mg L-1) and COD (8.6-29.2 mg L-1) (Table 3). The result are similar with the report of Mishra and Tripathi [15]. They reported a significant variation in values of DO, BOD, and COD between untreated and treated sewage waste water. The treated sewage water showed a sharp reduction in BOD (84.9%) and COD (79.9%) and DO content of treated sewage increased by 62.4%. DO, BOD and COD are important parameters which should be determined to perform the sewage quality analysis. These findings are similar to that of Joshi and Sharma [16]. They performed bioremediation of sewage through 
    bacterial inoculation under in vitro and reported a reduction in BOD and COD after 24, 48 and 72 h. Maximum reduction (79.45% in BOD and 72.25% in COD) was observed after inoculation period of 72 h. with bacterial cultures. 

    EM処理の後、すべてのパラメータ、すなわち、無色、無臭、 pH値は6.8から7.5の範囲で急激な減少を示したTDS ( 3.31から16.5 mgのL-1) 、 (表2) DO ( 10から11.2 mgのL-1) 、 BOD ( 1.6から6.4ミリグラムL-1)及びCOD( 8.6から29.2 mgのL-1) (表3) 。
    その結果、ミシュラとTripathiさん(15)の報告と類似しています。
    彼らは、未処理および処理下水の排水の間、DO 、 BOD 、 CODとの値の大幅な変化を報告した。

    下水処理水は、シャープなBODの減少( 84.9% )とCOD ( 79.9% )を示し、下水処理水の含有量は62.4%増加してください。 DO 、 BODおよびCODは、下水品質分析を実行するように決定されるべき重要なパラメータである。

    http://omicsonline.org/laboratory-scale-bioremediation-of-the-yamuna-water-with-effective-microbes-em-technology-and-nanotechnology-2155-6199.1000160.pdf
    より紹介 訳は自動翻訳
    | powerofem | - | 11:15 | comments(0) | - |
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