馬鈴薯デンプン製造廃水処理に関する研究 : (第5報)噴射方式による処理試験(その2)

概要

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In a previous report, the relationship between the COD loading of white potato starch waste and the removal efficiency in the "Funsha-hoshiki" process, which was practiced on an industrial scale, was investigated. In the "Funsha-hoshiki" process, waste was aerated by circulation and agitation of the surface of the waste so that constantly renewed surfaces were able to contact with the atmosphere. Waste in the secondary tank was pumped up, being ejected by a nozzle over the surface of the waste in the aeration tank, as shown in Fig. 1 and 2. Oxygen was absorbed into the waste by the ejection as well as from the surface of waste in the aeration tank. In this report, the effect of the volme of waste ejected by the nozzle on the removal efficiency was investigated. When the waste ejected from the nozzle was 72-114 m^3/hr, the COD removal rate of the waste was in the range of 48〜66 % at 13〜15℃. The greater part of the operating cost of this "Funsha-hoshiki" process was the cost of power consumption for the operation of the two pumps. The electric power consumption per kilogram of COD removal was 0.42〜0.57 kWh/kg.
公益社団法人日本生物工学会の論文
1968-10-25