title: Removal of volatile fatty acids with immobilized Rhodococcus sp. B261.
abstract: The removal of aqueous volatile fatty acids (VFA) in wastewater and spoiled waste-foods by immobilized Rhodococcus sp. B261 was investigated. The n-valeric acid (0.5%) was completely removed within 25 h under the following conditions; solution pH, 8.0; air flow rate, 0.2 l/min; superficial velocity, 0.96 h(-1); temperature, 37 degrees C. Under the optimized conditions, the acetic (8525 ppm), propionic (7310 ppm) and n-butyric (4360 ppm) except n-valeric (2572 ppm) acids from the wastewater were completely removed by immobilized Rhodococcus sp. B261 in 24 h. The acetic (7810 ppm), propionic (8942 ppm) and butyric (5730 ppm) acids from the solution of spoiled waste-foods were effectively removed by immobilized Rhodococcus sp. B261 from 48 h within 60 h but n-valeric acid (3625 ppm) took 72 h.
authors.affiliation: Food Science and Technology Major, Division of Biotechnology, Chonbuk National University, 664-14, Deokjin-Dong, Deokjin-Gu, Jeonju, Jeonbuk 651-756, South Korea. siyun@chonbuk.ac.kr
authors.forename: Soon-Il
authors.initials: SI
authors.lastname: Yun
authors.forename: Yoshiyuki
authors.initials: Y
authors.lastname: Ohta
mesh_terms: D019342:Acetic Acid / Q000378:metabolism; D000388:Air; D019149:Bioreactors; D020148:Butyric Acid / Q000378:metabolism; D005227:Fatty Acids / Q000302:isolation & purification* / Q000378:metabolism; D005735:Garbage; D006863:Hydrogen-Ion Concentration; D008863:Microspheres; D010421:Pentanoic Acids / Q000378:metabolism; D011422:Propionates / Q000378:metabolism; D012240:Rhodococcus / Q000378:metabolism*; D013696:Temperature; D013997:Time Factors; D014865:Waste Disposal, Fluid / Q000295:instrumentation / Q000379:methods*
chemical_list: D005227:Fatty Acids; D010421:Pentanoic Acids; D011422:Propionates; D020148:Butyric Acid; C038780:n-pentanoic acid; C029658:propionic acid; D019342:Acetic Acid