Influence of surfactant conditioning on sludge dewaterability in various pH value

被引：3

作者：

Hong, Chen ^{[1
]}

Xing, Yi ^{[1
]}

Wang, Zhi-Qiang ^{[1
]}

Si, Yan-Xiao ^{[1
]}

Zhou, Liang ^{[1
]}

机构：

[1] School of Civil and Environmental Engineering, University of science and Technology Beijing

来源：

Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science) | 2014年 / 48卷 / 05期

关键词：

Acid-alkali pretreatment; Dewatering; Extracellular polymeric substance; Sludge; Surfactant;

D O I：

10.3785/j.issn.1008-973X.2014.05.014

中图分类号：

学科分类号：

摘要：

To improve the sludge dewaterability, the potential benefits of sludge dewaterability under surfactant-conditioning with acid-alkali pretreatment were investigated. Sludge was treated by surfactant dodecyl dimethyl benzyl ammonium chloride, and then the effect of surfactant dosage and pH on sludge dewaterability [water content of dewatered sludge (w(H2O)) and specific resistance of filtration (rSRF)] were discussed. Extracellular polymeric substance (EPS) content, organic acid content and rheological property were measured in an attempt to explain the sludge dewaterability mechanism under surfactant conditioning in various pH. The results show that the surfactant has positive effect on the sludge dewaterability. The addition of surfactant can change EPS content ρ(EPS), promote EPS hydrolysis, reduce the apparent viscosity and then improve sludge dewaterability. When sludge is conditioned by surfactant with alkaline pretraetment, ρ(EPS) in supernatant increase dramatically which result in rSRF, w(H2O) and rheological property increasing significantly, and then sludge dewaterability deteriorated. As a comparison, the effects of surfactant conditioning sludge with acid pretreatment are better, w(H2O) decrease obviously. The results also demonstrate that a surfactant dosage of 93.75 mg·g-1 at pH= 3 is an ideal condition, w(H2O) and rSRF decrease to 61.12% and 0.59×1013 m·kg-1, respectively.

引用

页码：850 / 857+870

共 35 条

[1]

Neyens E., Baeyens J., Dewil R., Advanced sludge treatment affects extracellular polymeric substances to improve activated sludge dewatering, Journal of Hazardous Materials, 106, 2, pp. 83-92, (2004)

[2]

Feng X., Deng J., Lei H., Et al., Dewaterability of waste activated sludge with ultrasound conditioning, Bioresource Technology, 100, 3, pp. 1074-1081, (2009)

[3]

Zhang D., Chen Y., Zhao Y., Et al., New sludge pretreatment method to improve methane production in waste activated sludge digestion, Environmental Science & Technology, 44, 12, pp. 4802-4808, (2010)

[4]

Yuan H., Cheng X., Chen S., Et al., New sludge pretreatment method to improve dewaterability of waste activated sludge, Bioresource Technology, 102, 10, pp. 5659-5664, (2011)

[5]

Tokumursa M., Sekine M., Yoshinari M., Et al., Photo-Fenton process for excess sludge disintegration, Process Biochemistry, 42, 4, pp. 627-633, (2007)

[6]

Zhao Y.Q., Bache D.H., Conditioning of alum sludge with polymer and gypsum, Colloids and Surfaces, 194, 1, pp. 213-220, (2001)

[7]

Ma W., Zhao Y.Q., Kearney P., A study of dual polymer conditioning of aluminum-based drinking water treatment residual, Journal of Environmental Science and Health, 42, 7, pp. 961-968, (2007)

[8]

Neyens E., Baeyens J., A review of classic Fenton's peroxidation as an advanced oxidation technique, Journal of Hazardous Materials, 98, 1, pp. 33-50, (2003)

[9]

Bolto B., Gregory J., Organic polyelectrolytes in water treatment, Water Research, 41, 11, pp. 2301-2324, (2007)

[10]

Chen Y., Yang H., Gu G., Effect of acid and surfactant treatment on activated sludge dewatering and settling, Water Research, 35, 11, pp. 2615-2620, (2001)

← 1 2 3 4 →