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一种计算蒸发条件下农田排水的新方法 被引量:2
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作者 王文焰 党志良 《西北农业大学学报》 CSCD 1992年第2期45-52,共8页
本文分析了排水地段的地下水位在蒸发及排水双重作用下的回降速度规律,提出一种适用于蒸发指数为任意值的农田排水沟(管)间距的计算方法。根据排水地段试验所得的地下水位变化的实测资料,用该法可求得适于该地区排水计算的有关参数值。
关键词 地下水位 明沟排水 蒸发 回降速度
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A Preliminary Study on Cactus as Flocculants in Water Recycling from Moroccan Phosphates Schlamms
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作者 Jihane Briuni Jamal NajaI Rachid M'hamdi 《Journal of Chemistry and Chemical Engineering》 2010年第4期19-23,共5页
In this work we used a new organic biodegradable flocculants which is the cactus cladodes juice in order to recycle water from phosphate schlamms. This flocculants has enabled us to increase the settling velocity of t... In this work we used a new organic biodegradable flocculants which is the cactus cladodes juice in order to recycle water from phosphate schlamms. This flocculants has enabled us to increase the settling velocity of the schlamms so consequently the water recycled degree. The study was conducted on an industrial sample of phosphates schlamms from Khouribga phosphates washing plant. The study was about the influence of concentration, pH, and velocity gradient with cactus extract leads to satisfactory results in term of settling decantation, and in water recycling degree which is 93%. 展开更多
关键词 Flocculations phosphates shlamms cactus extracts recycle water.
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