Biopolymers as biofilters and biobarriers

M. A. Ashraf, S. Batool, M. Ahmad, M. Sarfraz, Wan Syaidatul Aqma Wan Mohd Noor

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Citation (Scopus)

Abstract

The use of biopolymers is a sophisticated method of soil and wastewater treatment as a substitute for using chemicals, which is a public health concern. A number of mechanisms, such as polymer bridging, polymer adsorption, charge neutralization (including electrostatic patch effects), coagulation/flocculation, and adsorption have been suggested to describe the destabilization of colloids and suspensions by biopolymers. A number of factors, such as sorption capacity of biopolymers, concentration of biopolymers, DO, NO3-, pH, additives, extracellular polymeric substances, and microbial immobilization time, have been optimized to enhance the efficiency of biopolymers in biofiltration/biobarrier systems. Beside this, biopolymers in combination with other polymers, biopolymers, and microorganisms have been successfully employed as biofilters/biobarriers. In order to enhance application and decrease prolonged startup procedures of a biofilter, such systems are often seeded with microbes of interest to expedite quick biofilm development. Upflow packed bed bioreactors using microbial cellulose have greater than 90% denitrification capacity. Fixed-bed bioreactors using magnetic chitosan and polycaprolactone have excellent efficiency to remediate Cu, P, As(V), As(III), and NO3-. Mulch film biobarriers, permeable reactive biobarriers using peat moss, and organic mulch and biotrickling filter systems have been successfully implemented for the remediation of naphthalene, organic compounds, and isopropyl alcohol and benzene-toluene-ethylene-xylene, respectively. Therefore, biopolymers have been verified to be appropriate for remedial properties by regulating the microbial entrapment and adsorption in the biofiltration system. The emergence of these novel biofilters and biobarriers for large-scale effluent treatment and implementation should be accompanied by some key objectives.

Original languageEnglish
Title of host publicationBiopolymers and Biotech Admixtures for Eco-Efficient Construction Materials
PublisherElsevier Inc.
Pages387-420
Number of pages34
ISBN (Print)9780081002148
DOIs
Publication statusPublished - 12 Jan 2016
Externally publishedYes

Fingerprint

Biofilters
Biopolymers
Biofiltration
Bioreactors
Adsorption
Polymers
Polycaprolactone
Effluent treatment
Peat
Denitrification
Flocculation
Biofilms
Packed beds
Public health
Xylene
Naphthalene
Coagulation
Remediation
Colloids
Chitosan

Keywords

  • Adsorption
  • Alginate
  • Biobarrier
  • Biofilter
  • Biopolymer
  • BTF
  • Chitosan
  • Contaminant remediation
  • MC
  • Microbial immobilization

ASJC Scopus subject areas

  • Engineering(all)
  • Arts and Humanities(all)

Cite this

Ashraf, M. A., Batool, S., Ahmad, M., Sarfraz, M., & Wan Mohd Noor, W. S. A. (2016). Biopolymers as biofilters and biobarriers. In Biopolymers and Biotech Admixtures for Eco-Efficient Construction Materials (pp. 387-420). Elsevier Inc.. https://doi.org/10.1016/B978-0-08-100214-8.00017-8

Biopolymers as biofilters and biobarriers. / Ashraf, M. A.; Batool, S.; Ahmad, M.; Sarfraz, M.; Wan Mohd Noor, Wan Syaidatul Aqma.

Biopolymers and Biotech Admixtures for Eco-Efficient Construction Materials. Elsevier Inc., 2016. p. 387-420.

Research output: Chapter in Book/Report/Conference proceedingChapter

Ashraf, MA, Batool, S, Ahmad, M, Sarfraz, M & Wan Mohd Noor, WSA 2016, Biopolymers as biofilters and biobarriers. in Biopolymers and Biotech Admixtures for Eco-Efficient Construction Materials. Elsevier Inc., pp. 387-420. https://doi.org/10.1016/B978-0-08-100214-8.00017-8
Ashraf MA, Batool S, Ahmad M, Sarfraz M, Wan Mohd Noor WSA. Biopolymers as biofilters and biobarriers. In Biopolymers and Biotech Admixtures for Eco-Efficient Construction Materials. Elsevier Inc. 2016. p. 387-420 https://doi.org/10.1016/B978-0-08-100214-8.00017-8
Ashraf, M. A. ; Batool, S. ; Ahmad, M. ; Sarfraz, M. ; Wan Mohd Noor, Wan Syaidatul Aqma. / Biopolymers as biofilters and biobarriers. Biopolymers and Biotech Admixtures for Eco-Efficient Construction Materials. Elsevier Inc., 2016. pp. 387-420
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AB - The use of biopolymers is a sophisticated method of soil and wastewater treatment as a substitute for using chemicals, which is a public health concern. A number of mechanisms, such as polymer bridging, polymer adsorption, charge neutralization (including electrostatic patch effects), coagulation/flocculation, and adsorption have been suggested to describe the destabilization of colloids and suspensions by biopolymers. A number of factors, such as sorption capacity of biopolymers, concentration of biopolymers, DO, NO3-, pH, additives, extracellular polymeric substances, and microbial immobilization time, have been optimized to enhance the efficiency of biopolymers in biofiltration/biobarrier systems. Beside this, biopolymers in combination with other polymers, biopolymers, and microorganisms have been successfully employed as biofilters/biobarriers. In order to enhance application and decrease prolonged startup procedures of a biofilter, such systems are often seeded with microbes of interest to expedite quick biofilm development. Upflow packed bed bioreactors using microbial cellulose have greater than 90% denitrification capacity. Fixed-bed bioreactors using magnetic chitosan and polycaprolactone have excellent efficiency to remediate Cu, P, As(V), As(III), and NO3-. Mulch film biobarriers, permeable reactive biobarriers using peat moss, and organic mulch and biotrickling filter systems have been successfully implemented for the remediation of naphthalene, organic compounds, and isopropyl alcohol and benzene-toluene-ethylene-xylene, respectively. Therefore, biopolymers have been verified to be appropriate for remedial properties by regulating the microbial entrapment and adsorption in the biofiltration system. The emergence of these novel biofilters and biobarriers for large-scale effluent treatment and implementation should be accompanied by some key objectives.

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KW - BTF

KW - Chitosan

KW - Contaminant remediation

KW - MC

KW - Microbial immobilization

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