To discuss the problem of excess sludge reduction,ozonation was used to treat sludge from aerotank,and influences to COD、NH_3-N and TP by excess sludge reduction were studied.Test indicated that:specific desaturase activity of excess sludge decreased with oxidation time;in mixture of sludge and water after oxidation,SCOD increased with time extending;the removal rate of COD and TP had no obvious change,and the removal rate of NH_3-N increased a little when access sludge after oxidation was discharged into A...
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The test indicated that the products made by the composite met the designing demand.
试验证明：应用该材料制造的产品符合设计要求。
The results of electrochemical test indicated that all the tested alloys may be passivated rapidly.
电化学实验表明，所有实验合金均较快进入钝态；
The field test indicated that the developed drilling rig is appropriate for underground pre-drainage of coal seams.
现场试验表明，这是一种适于井下工作面钻进瓦斯预抽放短钻孔的轻便高效钻机。
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