Báo cáo nghiên cứu khoa học: " FLOCCULATION DYNAMICS OF SYNTHETIC AND ACTIVATED SLUDGE IN WASTEWATER TREATMENT"

Nghiên cứu này đã điều tra trong một thời trang so sánh hiệu quả của các cation, polysaccharide, và Polyelectrolyte vào các động lực kết bông và các tính chất cuối cùng của bùn tổng hợp và kích hoạt cả hai. | Science Technology Development Vol 12 - 2009 FLOCCULATION DYNAMICS OF SYNTHETIC AND ACTIVATED SLUDGE IN WASTEWATER TREATMENT Nguyen Tan Phong 1 Nidal Hilal 2 and John T Novak 3 l University of Technology VNU-HCM 2 The University of Nottingham University Park Nottingham 3 Department of Civil Environmental Engineering Virginia Tech Blacksburg Virginia Manuscript Received on November 13th 2008 Manuscript Revised February27th 2009 ABSTRACT This study has investigated in a comparative fashion the effect of cation polysaccharide and Polyelectrolyte on the flocculation dynamics and final properties of both synthetic and activated sludge. The results from experiments indicate that cation polysaccharide and Polyelectrolyte could influence sludge floc characteristics as they relate to sludge conditioning. The relationship between polysaccharide and cation concentration was examined at laboratory scale during flocculation with both synthetic and activated sludge an increase in feed cation concentration led to a decrease in final polysaccharide concentration of the supernatant. The effects of a polyelectrolyte conditioner on sludge conditioning were determined. The results indicated that the cationic Polyelectrolyte had the critical effect on sludge dewatering and made the improvement of the final properties of sludge. A qualitative link exists between polyelectrolyte conditioner dosage and sludge conditioning for both types of sludge. The two types of sludge also have very similar sludge conditioning. Thus synthetic and activated sludge behave very similarly in terms of their characteristics and sludge conditioning and synthetic sludge can be used as a surrogate in activated sludge studies. Keywords Activated sludge Synthetic sludge Calcium ions Polysaccharide Polyelectrolyte Sludge properties. 1. INTRODUCTION Activated sludge is a heterogeneous mixture of particles micro-organisms colloids organic polymers and cation whose composition depends on the origin of the .

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