Synthesis of a new type poly(vinyl alcohol)/peat/bamboo charcoal/KNO₃ composite bead used as biofilter material

• Published in: Journal of applied polymer science 2011-05, Vol.120 (3), p.1782-1787
• Main Authors: Chan, Wu-Chung, Chang, Shih-Cheng
• Format: Article
• Language: English
• Subjects: Application fields; Applied sciences; Atmospheric pollution; Bamboo; Beads; Biochemistry; Biological and medical sciences; biological application of polymers; Biological treatment of gaseous effluents; Biotechnology; Charcoal; composites; Environment and pollution; Exact sciences and technology; Fundamental and applied biological sciences. Psychology; General processes of purification and dust removal; Industrial applications and implications. Economical aspects; Inlets; Materials science; Microorganisms; Peat; Pollution; poly(vinyl alcohol) (PVA); Polymer industry, paints, wood; Polymers; Polyvinyl alcohols; Prevention and purification methods; synthesis; Technology of polymers
• ISSN: 0021-8995; 1097-4628; 1097-4628
• DOI: 10.1002/app.33390

A new type poly(vinyl alcohol) (PVA)/peat/bamboo charcoal (BC)/KNO₃ composite bead was prepared, which has a diameter of 2.4-6.0 mm and a density of 1.133 g/cm³ and is a porous spherical particle. The biochemical kinetic behaviors of n-butyl acetate in PVA/peat/BC/KNO₃ spherical composite bead biofilter (BC biofilter) and PVA/peat/granular activated carbon (GAC)/KNO₃ spherical composite bead biofilter (GAC biofilter) were investigated. The values of half-saturation constant Ks for BC biofilter and GAC biofilter were 27.89 and 27.95 ppm, respectively. The values of maximum reaction rate Vm for BC biofilter and GAC biofilter were 13.49 and 13.65 ppm/s, respectively. Zero-order kinetic with the diffusion limitation was regarded as the most adequate biochemical reaction model for the two biofilters. The microbial growth rate and biochemical reaction rate for two biofilters were inhibited at higher inlet concentration, and the degree of inhibitive effect was more pronounced in the inlet concentration range of 100-800 ppm. The biochemical kinetic behaviors of the two biofilters were similar. The maximum elimination capacity of BC biofilter and GAC biofilter were 111.65 and 122.67 g C/h m³ bed volume, respectively. The PVA/peat/BC/KNO₃ composite bead was suitable as a biofilter material.