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KMID : 0364819870250040333
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Korean Journal of Microbiology
1987 Volume.25 No. 4 p.333 ~ p.338
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Studies on the Biological Treatment of Waste Water from Acetaldehyde Plant
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정기택/Chung Ki-Taek
서승교/송형익/박임동/방광웅/Seung-Kyo Suh/Song, Hyung-Ik/Park, Im-Dong/Bang, Kwang-Woong
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Abstract
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1
In order to establish the biological treatment system which can be used for treatment of waste water from acetaldehyde plant, it was investigated optimum nutrient requirements and growth conditions by mixed culture of Micrococcus roseus AW-6, Micrococcus luteus AW-22, Mkrobacteriurn lacticum AW-38 and Microbacterium laevanijormans AW-41 as well as the effect of coagulants and neutralisation reagents. Also, it was carried out the continuous culture as well as batch culture to treat the waste water by mixed culture of these strains.
The COD removal rate was reached to maximum state for 96 hrs culture at pH 7.0 and 30 °C. NaOH as the neutralization reagents was the most effective, but the coagulants had no effect on the COD removal rate and the optimum dilution times for treatment were 10 fold. The COD removal rate was also increased by supplementing 200 ppm NH2NO3, 50 ppm KH2PO4, 15 ppm CaCI2 and I ppm M8SO4.7H2O as additional nutrients. The removal rate coefficient K, on the batch culture was 4.5 x 10-4, and the detention time for ROD removal rate of 859 was approximately 45 hrs. The COD of wage water was reduced to 15% of its initial value by the continuous culture. The COD and BOD of the effluents were to be about 60 ppm and 40 ppm, respectively, and final pH was 7.0.
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