Abstract
Soluble polyacrylate (PA), a polydisperse mixture of polyacrylate polymers, is strongly adsorbed and biodegradable. Biotic fate studies were carried out with once-through columns containing sand colonized with anaerobic biomass previously grown in a methanogenic fluidized bed. A fraction of soluble PA having a weight-average molecular weight of 16,700 and a range of molecular weight from 103 to 105 was biologically removed and mineralized to CO2. Due to its polydisperse nature, the breakthrough curve had a gradual increase to an apparent steady-state removal of approximately 60% near one day when the liquid detention time was 21 minutes. Modeling successfully explained the observed breakthrough result when the fraction was divided into components having a wide range of retardation factors (R): about 25% was strongly adsorbed (R=200 and 500), 45% was moderately adsorbed (R=50 and 100), and 30% was weakly adsorbed (R=1–10). In this study, in which active biomass already was present from utilization of a primary substrate (glucose here), equilibrium adsorption increased the time to breakthrough, which also reduced the exiting concentration by increasing the substrate contact time.
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References
Chang HT & Rittmann BE (1988) Comparative study of biofilm kinetics on different adsorptive media. J. Water Pollution Control Federation, 60: 362–368
Freeze RA & Cherry JA (1979) Groundwater. Prentice-Hall Publ., Inc. Engelwood Cliffs, New Jersey
Henry B (1990). Effects of polydisperse size distribution on the simultaneous transport, adsorption, and biodegradation of polyacrylate in a porous medium. M.S. Thesis, Dept. of Civil Engr., University of Illinois, Urbana, IL
Kobayashi H & Rittmann BE (1982) Microbial removal of hazardous organic chemicals. Environ. Sci. Technol., 16: 170A181A
Levenspiel O (1972) Chemical Reaction Engineering, John Wiley & Sons, Inc., New York
McQuarrie KTB, Sudicky EA & Frind EO (1990) Simulation of biodegradable organic contaminants in groundwater. 1. Numerical formulation in principle directions. Water Resources Res. 26: 207–233
Odencrantz JE, Bae W, Valocchi AJ & Rittmann BE (1990) Stimulation of biologically active zones (BAZs) in porous media by electron-accepter injection. J. Contam. Hydrol. 6: 37–52
Odencrantz JE, Valocchi AJ & Rittmann BE (1991) Modeling two-dimensional solute transport with different biodegradation kinetics. Proc. Petroleum Hydrocarbons and Organic Chemicals in Ground Water: Prevention, Detection, and Restoration. National Water Well Assn., pp. 355–368
Rittmann BE, Henry B & Sutfin JA (1992) Biodegradation and sorption properties of polydisperse acrylate polymers. Biodegradation (this issue)
Rittmann BE & McCarty PL (1981) Substrate flux into biofilms of any thickness. J. Environ. Engr. (ASCE) 107: 831–849
Wheeler MF (1988) Modeling of highly advective flow problems. In Developments in Water Science, Vol. 1, Modeling Surface and Sub-Surface Flows. Elsevier Publishers, New York
Wheeler MF & Dawson CN (1987) An Operator Splitting Method for Advection-Diffusion-Reaction Problems. Technical Report 87–9, Dept. of Mathematical Sciences, Rice University, Houston, Texas
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Rittmann, B.E., Henry, B., Odencrantz, J.E. et al. Biological fate of a polydisperse acrylate polymer in anaerobic sand-medium transport. Biodegradation 2, 171–179 (1991). https://doi.org/10.1007/BF00124491
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DOI: https://doi.org/10.1007/BF00124491