水銀気散活性と活性汚泥の水銀含有廃水処理能力の検討 : 活性汚泥による水銀含有廃水の処理(第2報)

概要

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In the previous report, the mechanism of mercury elimination in treatment of waste water containing mercuric chloride by activated sludge was studied. It was found that added mercuric chloride was reduced to metallic mercury and volatilized, and also, it was assumed that the use of mercury volatilization rate was an appropriate index of activity. In this report, mercury volatilization rate was measured by flameless atomic absorption and, the effectiveness was discussed based on the results.The decrease in mercury concentration by adsorption to sludge and volatilization was reduced with decreasing sludge concentration, but it was found that 20 ppm of sludge was appropriate, and that at a sludge concentration below 10 ppm the amount of volatilized mercury decreased and accuracy of measurement was reduce. Addition of synthetic waste water had no effect. Optimum pH and temperature for mercury volatilization were from 8 to 9 and from 42 to 43℃, respectively. It was assumed that accuracy of measurement was increased by ultra-sonic treatment of sludge.From the relation between mercury concentration and mercury volatilization rate, applicability to completely mixed continuous treatment was discussed, and it was found that acclimated sludge was highly capable of mercury elimination from waste water.
社団法人日本生物工学会の論文
1974-11-25