Effect of Pressure, Concentration and Sludge Volume on Two-phase Filtrate Volumes Using Bentonite Clay Sludge
Advances in Research, Volume 24, Issue 3,
The effect of pressure, solids concentration and volume of slurry on total and two-phase filtrate volumes was investigated to establish optimum conditions for routine laboratory filtration. Full factorial design with three levels was utilized to obtain 27 unique experiments. The slurry used was prepared by mixing crushed and sieved bentonite clay of 75 microns with distilled water at different concentrations as obtained from the design of experiment. A filter press was utilized and the results were used to calibrate a two-phase exponential equation for sludge filtration to extract the first and second stage filtrate volumes. The total filtrate volume improved with increasing applied pressure and decreasing solids concentration. A slurry volume of 0.22 litres was found to be ideal. Similar effects were noticed on the first and second stage filtrate volume except that an optimum was discovered at 0.18 litres of slurry. The second stage filtration produced an upward curve with a point of inflection at a range of 0.18 to 0.22 litres of slurry. The second stage filtrate volume is also discovered to be directly proportional to the total filtrate volume. This connection may be considered for use to assess the filterability of other slurries.
- solids concentration
- first stage
- second stage
How to Cite
Stickland AD, De-Kretser RG, Scales PJ. Nontraditional Constant Pressure Filtration Behavior. AIChE J. 2005;51: 2481.
Matteson MJ, Orr C. Filtration: Principles and Practices. Marcel Dekker, Inc. 1987;447-494.
Treffry-Goatley K, Buchan MI, Renchen G, Buckley CA. The Dewatering of Sludges Using a Tubular Filter Press. Desalination, 1987;67:467-479.
Onoh C, Ademiluyi JO, Amah VE. Factors affecting capillary suction time of sludge using wet front distance and filtrate flow rate methods. AJARR. 2021;15(1): 44-53.
Trubnick EH, Mueller PK. Sludge dewatering practice. Sewage and Industrial Wastes. 1958;30(11):1364-1378.
Coackley P, Jones RS. Vacuum sludge filtration. Sewage and Industrial Waste Journal. 1956;45(2): 301-314.
Carman PC. A Study of the Mechanism of Filtration. Part I. Jour. Soc. Chem. Ind. (Brit.), 1933;52, 280 T.
Karr PR, Keinath TM. Influence of Particle Size on Sludge Dewaterability. J. Wiley (Water Pollution Control Federation). 1978; 50(8):1911 – 1930.
Rudolfs W, Gehm HW. Colloids in Sewage and Sewage Treatment. I. Occurrence and Role. A Critical Review. Sewage Works Jour. 1939;11(5):727.
Garber WF. Plant-Scale Studies of Thermophilic Digestion at Los Angeles”. J. Wiley (Water Pollution Control Federation). 1954;26(10):1202.
Ademiluyi JO, Egbuniwe, N. Units of specific resistance. EWTJ. 1984;24: 233-236.
Schepman BA, Cornell CF. Fundamental Operating Variables in Sewage Sludge Filtration. Sewage and industrial Wastes. 1956;28(12):1443.
Torpey WN, Lang M. Elutriation as a Substitute for Secondary Digestion. Sewage and industrial Wastes. 1952;24(7): 813.
Amah VE, Ademiluyi JO. Double Exponential Modelling of Sludge Filtration. PhD Thesis, University of Nigeria, Nsukka; 2022
Ademiluyi JO, Eze BI. FMT LxLyLz dimensional equation for sludge drying beds. NIJOTECH J. 2014;33(3): 367-374.
Saputri RY, Nisa QAK, Yulianto ME, Paramita V. Effect of Pressure Differences on Sludge Filtration Process Efficiency by Using Plate Filter Press. Journal of Vocational Studies on Applied Research. 2019;1(2):22-26.
Dickenson TC. Filters and filtration handbook. Elsevier; 1997.
Peng G, Fenxia Y, Ying L. Comparative investigation of Parameters for determining the dewaterability of Activated sludge. Water Environment Research. Wiley. 2011;83(7):667-671.
Lee DJ. Measurement of Bound Water in Waste Activated Sludge: Use of the Centrifugal Settling Method. J. Chem. Technol. Biotechnol. 1995;61:139-144.
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