Enhanced primary treatment of low-concentration municipal wastewater by means of bio-flocculant Pullulan

Jar tests were conducted to investigate the performance of enhanced primary treatment processes for low-concentration municipal wastewater from South China by using composite flocculant combined with bio-flocculants Pullulan and poly-aluminum-chloride （PAC）. The optimum dosage for composite floccula...

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Bibliographic Details
Published in:Journal of Zhejiang University. A. Science 2007-05, Vol.8 (5), p.719-723
Main Authors: Yang, Kai, Yang, Xiao-Jun, Yang, Mo
Format: Article
Language:English
Subjects:
Chemical Oxygen Demand
低浓度城市污水
强化初级处理
普鲁兰多糖
污水处理
生物絮凝剂
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Summary:Jar tests were conducted to investigate the performance of enhanced primary treatment processes for low-concentration municipal wastewater from South China by using composite flocculant combined with bio-flocculants Pullulan and poly-aluminum-chloride （PAC）. The optimum dosage for composite flocculant and conditions for flocculation were determined. The experimental results indicated that composite flocculant had high efficiency for removing over 95% of turbidity, over 58% of CODcr （chemical oxygen demand determined with potassium dichromate）, over 91% Of TP （total phosphate）, and over 15% of NH3-N. Moreover, it could improve sludge settling and dehydration properties, and decrease the treatment cost.
ISSN:1673-565X
1862-1775
DOI:10.1631/jzus.2007.A0719