特殊産業廃水の微生物処理に関する研究 : (第7報)石油精製工場廃水について

概要

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1. Treatment of refinery waste water by means of the activated sludge method was tested using waste water from an oil separator and artificial refinery waste water containing emulsified oil which was prepared with ultrasonic units in our laboratory.2. As to the refinery waste water whose concentration of oil is in the range of 15-50 ppm, the oil was treated biologically down to 2.0-2.5 ppm at the oil loading of 0.1-0.2 kg/m^3/d, and 99% of BOD and 70-80% of COD were removed. The final effluent was tasteless, and odorless, and a report from the Fisheries Experiment Station in the distinct of Tokai, Agency of the Fisheries, indicated that there is no fear of odor being imparted to fish if the effluent from activated sludge units is diluted 10 times.3. Addition of artificial waste water as a nutrient was effective for the purification of oil by means of the activated sludge method. In the biological treatment of refinery waste water, it is desirable to keep the ratio of oil to BOD at 1 : 3-5 at least.4. Effects of addition of heavy oil on the thermophilic methane fermentation were not recognized when the concentration of heavy oil in the raw waste water was less than 10%.
社団法人日本生物工学会の論文
1967-09-25