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1)  acid pretreatment
酸预处理
1.
Promotive effect of acid pretreatment of corn stalk using metal cations
金属阳离子促进酸预处理玉米秸秆效果
2.
The results showed that five factors were the main influence factors and the optimal conditions by acid pretreatment were processing time 2 h,temperature 130℃,concentration of H2SO4 3%,substrate concentration 35 g/L and particle size 0.
采用酸预处理正交试验和微波强化酸预处理试验,研究时间、温度、基质浓度、硫酸浓度及粒径对玉米秸秆糖化预处理效果的影响。
3.
The result showed that the strong acid pretreatment for swine manure were better than these by medium strong acid and weak acid pretreatment,and the optical pretreatment condition for swine manure was concentration of HCl 5%,temperature 45 ℃ and treatment 4h to get 46.
结果表明:强酸预处理猪粪便优于中强酸和弱酸,而5%盐酸在110℃预处理猪粪便4 h可以使还原糖含量达到46。
2)  sulfur acid pretreatment
硫酸预处理
1.
The wet process consisted of roasting,sulfur acid pretreatment and chlorination leaching of gold is examined.
本研究采用焙烧-硫酸预处理-氯化湿法工艺从其中回收金,金浸出率为97。
3)  non-acid pretreatment
无酸预处理
4)  acidizing pretreatment
酸化预处理
1.
On the other hand, acidizing pretreatment is one of the measures reducing fracture pressure.
破裂压力是水力压裂设计的关键参数,而酸化预处理是降低破裂压力的措施之一。
2.
Fracturing pressure model of ultra-deep reservoir is studied,fracturing pressure prediction model of perforated well established by utilizing acid sensitivity of rock mechanical properties and acid pretreatment to decrease formation fracturing pressure,and mechanisms of acidizing pretreatment decreas.
针对超深储层的破裂压力很高,对压裂施工设备的功率和承载能力要求更高,在施工安全上存在一定隐患的实际,研究了超深储层的破裂压力模型以及利用岩石力学性质的酸敏性,采取酸化预处理降低地层破裂压力,建立了射孔井筒破裂压力预测模型,分析了酸化预处理降低地层破裂压力机理。
5)  acid corroding pretreatment
酸蚀预处理
6)  Acidification pretreatment
酸化预处理
1.
Effects of acidification pretreatment on bio-fermentation of fresh organic wastes of chicken manure were studied.
在鸡粪混化反应器内,通过管道淋入鸡粪总量4%~6%的浓硫酸,进行酸化预处理后再进行发酵,能明显改变微生物生态环境,使生物发酵的启动温度略低于常规处理,但高温的持续时间延长,整个发酵期间pH均低于对照常规高温发酵。
补充资料:表面预处理
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性质:电镀前镀件表面的加工、处理过程,主要包括磨光、抛光、脱脂、浸蚀等工序。电镀零件表面除了存在自然氧化膜和一般接触的油污之外,有的零件还会带有热处理的氧化皮、淬火油、防锈油、润滑油等污垢。表面预处理的目的是为电镀过程提供一种平滑、有附着力的基体表面。不同的镀件应根据其表面状态、电镀层的要求和材质选择表面预处理的工序。

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