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A new synthetic biofiltration material: poly(vinyl alcohol)/pig manure compost composite beads
Author(s) -
Chan WuChung,
Zheng RuiXiang
Publication year - 2005
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.1236
Subject(s) - compost , biofilter , manure , adsorption , composite number , chemistry , moisture , vinyl alcohol , vinyl acetate , materials science , waste management , composite material , organic chemistry , agronomy , polymer , engineering , copolymer , biology
Poly(vinyl alcohol) (PVA)/pig manure compost composite beads proved suitable as a biofilter material in a biofiltration process. The composite bead is a porous spherical particle with a diameter between 2.4 and 6.0 mm and a density of 0.96 g cm −3 . It contains 9.43 mg P g −1 dry solid and 12.1 mg N g −1 dry solid. The equilibrium moisture contents of the PVA/compost composite beads bed for adsorption and holding experiments are 50.5% and 54.6% by wet basis, respectively, which correspond to the optimal filter material required and could sustain the biological activity. The PVA/pig manure compost composite beads bed has higher moisture‐holding capacity and compression strength than the pig manure compost bed. The PVA/compost composite beads have buffer capacity and could keep the filter bed at pH 6.9–7.2 during operating. The percentage of ethyl acetate removed could stay at over 99% for 40 days of operation as the PVA/pig manure compost composite beads adsorbed inorganic nitrate nutrient. The maximum elimination capacity of the PVA/pig manure compost composite beads filters at the loading rate of 0.71 kg ethyl acetate m −3 ‐bed h −1 is 0.71 kg ethyl acetate m −3 ‐bed h −1 . Copyright © 2005 Society of Chemical Industry