Conditioning Process of Fresh Activated Sludge

Authors: Salam K Al-Dawery, Mustafa S Nasser

Abstract:

The effect of polyelectrolytes; cationic and anionic charges and coagulants have been investigated for fresh activated sludge at different concentrations and pH values in a comparative fashion. The results from the experiments indicate that the cationic polyelectrolytes have a significant effluence on the sludge characteristic, degree of flocculation and water quality such as turbidity and SVI. The results show that the cationic CPAM-80 is the most effective polyelectrolyte used corresponding to turbidity and SVI despite of the variations in feed properties of the fresh activated sludge.

Keywords: Coagulant, Polyelectrolyte, Settling volume index, Turbidity.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1089138

References:

[1] Moundigl, B.M., Shah, B.D. ad soto, H.S. "Collision Efficient Factors in polymer flocculation of fine particles”, Journal of colloid and interface science 119, (1987), 466-473.
[2] C. P. Leslie Grady, Jr., G. T. Daigger and H. C. Lim, "Activated sludge, Biological Wastewater treatment, Marcel Dekker, 1990, pp. 377-485.
[3] Li, D.H. And Genczarezyk, J.J., "structure of activated sludge flocs, Biotechnol, Bioeng, 35(1990) 57-65.
[4] Richard, M., Brown, S. and Collins, F. "Activated sludge microbiology Problems and their Control”, In 2nd Annual USEPA National operator Trainers conference”, (2003), PP21 Buffalo, NY.
[5] Chang, G.R., Liu, J. C. and Lee, D.J. "Co-Conditioning and Dewatering of chemical sludge and waste activated sludge”, Wat. Res. 35, (2001), 786-794.
[6] Moeller, G. and Torres L.G. "Rheological Characterization of Primary and Secondary sludge Treated by Both Aerobic and Digestion”, Bioresource technology 61, (1997), 207-211.
[7] Ngugen T. P., N. Hilal, N. P. Hankings, J. T. Navak, ”Determination of the effect of cations and cationic polyelectrolytes on the characteristics and final properties of synthetic and achieved sludge, Desalination 222 (2008) 307-317.
[8] Ariffin, M. A. A, Razali, Z. Ahmada, "PolyDADMAC and Polyacrylamide as hybride flocculation system in the treatment of pulp and paper mills waste water”, Chemical engineering Journal, 179, (2012) 107-111.
[9] Salam, K. Al-Dawery and Ossama, H. Ali, "Using poly aluminum chloride in water treatment as a coagulant agent”, The Journal of Engineering Research, (ISSN: 1726-6742), Vol. 9, No.1, (2012), pp 33-38.
[10] M Stone and B G Krishnappan, "Floc morphology and size distributions of cohesive sediment in steady state flow, water research, 37, (2003), 2739-2747.
[11] Moeler, G and Torres, L.G. Rheological characterization of primary and secondary sludge Treated By both Aerobic and Anaeribic Digestion”, Bioresources Technology, 61, (1997) 207-211.
[12] APHA et el (1998), "Standard methods For Examination of water and wastewater”, Washington D.C: American Public Health Association, American water works association, water Pollution Control Federations.