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首頁> 外文學(xué)位 >Application of flocs analysis for coagulation optimization at the Split Lake water treatment plant.
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Application of flocs analysis for coagulation optimization at the Split Lake water treatment plant.

機(jī)譯:絮凝物分析在斯普利特湖水處理廠的混凝優(yōu)化中的應(yīng)用。

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The success of surface water treatment strongly depends on the effectiveness of coagulant performance. Aluminium sulfate (alum), the most widely used coagulant in water treatment plants in Canada, is well known for its poor performance in cold water. Polyaluminium chloride (PACl), a relatively new polymeric aluminium coagulant increasingly being used in water treatment plants, is found to have many advantages over conventional alum. However, PACl hydrolysis reaction is quite complex and its action is not fully understood. In this research, a series of bench-scale jar tests with alum and PACl was conducted. Alum and PACl coagulation flocs were analyzed for the evaluation of coagulant performances at 19°C and 5°C for the Split Lake water treatment plant.; The results of this research indicated that the settling properties of PACl flocs were superior to those of alum flocs, especially at the lower temperature. The average size of PACl flocs was relatively smaller than that of alum flocs. The density of PACl flocs could be higher than that of alum flocs. And the number of settled PACl flocs could be higher than that of settled alum flocs. The effects of temperature on alum flocs and PACl flocs were different. Alum flocs size decreased at 5°C. This is most likely due to the existence of monomeric aluminium species in alum aqueous solution. PACl flocs size did not change significantly at the 5°C. This may be due to the existence of Al137+ polymeric species in PACl aqueous solution.
機(jī)譯:地表水處理的成功在很大程度上取決于凝結(jié)劑性能的有效性。硫酸鋁(鋁)是加拿大水處理廠中使用最廣泛的凝結(jié)劑,以其在冷水中的性能較差而聞名。聚氯化鋁(PACl)是一種相對較新的聚合鋁凝結(jié)劑,越來越多地用于水處理廠,已發(fā)現(xiàn)它比常規(guī)明礬具有許多優(yōu)勢。但是,PAC1的水解反應(yīng)非常復(fù)雜,其作用還不完全清楚。在這項(xiàng)研究中,使用明礬和PACl進(jìn)行了一系列臺式罐試驗(yàn)。對明礬和PACl的絮凝絮凝物進(jìn)行了分析,以評估Split Lake水處理廠在19°C和5°C下的絮凝性能。該研究結(jié)果表明,PACl絮凝物的沉降性能優(yōu)于明礬絮凝物,特別是在較低溫度下。 PACl絮狀物的平均尺寸相對小于礬絮的平均尺寸。 PACl絮凝物的密度可以高于明礬絮凝物的密度。沉淀的PACl絮凝物的數(shù)量可能高于沉淀的明礬絮凝物的數(shù)量。溫度對明礬絮和PACl絮的影響是不同的。鋁絮狀物的尺寸在5°C時減小。這很可能是由于明礬水溶液中存在單體鋁物質(zhì)。在5°C下,PAC1絮狀物的尺寸沒有明顯變化。這可能是由于PACl水溶液中存在Al137 +聚合物。

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