无机-有机复合絮凝剂用于快速湖泊清淤研究
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摘要
针对湖泊清淤难题,釆用PAA联合氯化钙、碳酸钙净化湖泊水质和强化污泥脱水,从上清液和污泥两个角度分析有机絮凝剂和无机絮凝剂联用对改善湖泊环境质量,对污泥沉降速度、脱水速度和脱水程度的影响,确定最佳工艺条件为CaCl_2(1. 5 mL)-PAA(0. 7 mL)-CaCO_3(0. 15 g)。最佳工艺条件下的清淤效果为SV30值(15±1) mL,浊度(28±2) NTU,比阻(0. 45±0. 15)×10~8s~2/g,含水率(43. 5±2. 5)%。
For the lake desilting problem,the combination of PAA,calcium chloride and calcium carbonate was adopted to purify the quality of lakes and strengthen the sludge dewatering. From the perspective of supernatant and sludge,the effect of using the combination of inorganic flocculant and organic flocculant to improve the quality of lakes,and the effect on sludge setting velocity,the speed and the degree of dehydration were analyzed. The optimum process conditions were determined to be CaCl_2( 1. 5 mL)-PAA( 0. 7 mL)-CaCO_3( 0. 15 g). The dredging effects under the optimal process conditions were as follows: SV_(30) value was( 15±1) mL,turbidity was( 28 ±2) NTU,specific resistance was( 0. 45±0. 15) ×10~8s~2/g,and moisture content was( 43. 5±2. 5) %.
For the lake desilting problem,the combination of PAA,calcium chloride and calcium carbonate was adopted to purify the quality of lakes and strengthen the sludge dewatering. From the perspective of supernatant and sludge,the effect of using the combination of inorganic flocculant and organic flocculant to improve the quality of lakes,and the effect on sludge setting velocity,the speed and the degree of dehydration were analyzed. The optimum process conditions were determined to be CaCl_2( 1. 5 mL)-PAA( 0. 7 mL)-CaCO_3( 0. 15 g). The dredging effects under the optimal process conditions were as follows: SV_(30) value was( 15±1) mL,turbidity was( 28 ±2) NTU,specific resistance was( 0. 45±0. 15) ×10~8s~2/g,and moisture content was( 43. 5±2. 5) %.
引文
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[2]郦光梅,金宜英,李欢,等.无机调理剂对污泥建材化的影响研究[J].中国给水排水,2006,22(13):82-84.
[3]刘欢,杨家宽,时亚飞,等.不同调理方案下污泥脱水性能评价指标的相关性研究[J].环境科学,2011,32(11):3394-3399.
[4]邵林广,游映玖.武汉东湖水体富营养化现状及其控磷对策[J].武汉冶金科技大学学报,1999,22(2):139-141.
[5]顾延生,李雪艳,邱海鸥,等. 100年来东湖富营养化发生的沉积学记录[J].生态环境,2008,17(1):35-40.
[6]甘义群,郭永龙.武汉东湖富营养化现状分析及治理对策[J].长江流域资源与环境,2005,13(3):277-280.
[7]顾继光,周启星,王新.土壤重金属污染治理途径及研究进展[J].应用基础与工程科学学报,2003,11(2):143-151.
[8]施周,谢敏.混凝剂对水厂排泥水沉降及脱水性能的改善[J].中国给水排水,2003,19(12):40-42.
[9]袁园,杨海真.污泥化学调理和机械脱水方面的研究进展[J].上海环境科学,2003,22(7):499-505.
[10] No Vak J T,Agerbaek M L,Sorensen B L,et al. Conditioning,Filtering,and Expressing Waste Activated Sludge[J]. Journal of Environmental Engineering,1999,125(9):816-824.
[11] Cornelia G Sinn,Rumiana Dimova,Markus Antonietti. Isothermal Titration Calorimetry of the Polyelectrolyte/Water Interaction and Binding of Ca2+:Effects Determining the Quality of Polymeric Scale Inhibitors[J]. Macromolecules,2004,37:3444-3450.