title: Scaled-up bioconversion of fish waste to liquid fertilizer using a 5 L ribbon-type reactor.
abstract: A scaled-up conversion process of fish waste to liquid fertilizer was performed in a 5 L ribbon-type reactor. Biodegradation was performed by inoculation of autoclaved fish waste with 5.84 × 10(5) CFU mL(-1) of mixed microorganisms for 96 h. As a result, the pH changed from 6.92 to 5.72, the cell number reached 7.28 × 10(5) CFU mL(-1), and approximately 430 g (28.3%) of fish waste was degraded. Analyses indicated that the 96 h culture of inoculated fish waste possessed comparable fertilizing ability to commercial fertilizers in hydroponic culture with amino acid contents of 6.91 g 100 g(-1). Therefore, the scaled-up production achieved a more satisfactory fish waste degradation rate (3.61 g h(-1)) than the flask-scale production (0.24 g h(-1)). The biodegraded broth of fish waste at room temperature did not undergo putrefaction for 6 months due to the addition of 1% lactate.
authors.affiliation: Department of Biotechnology and Bioengineering, Pukyong National University, 599-1 Daeyeon-3 Dong, Nam-Gu, Busan 608 737, Republic of Korea.
authors.forename: Van Thingoc
authors.initials: VT
authors.lastname: Dao
authors.forename: Joong Kyun
authors.initials: JK
authors.lastname: Kim
mesh_terms: D000596:Amino Acids / Q000032:analysis; D000818:Animals; D001673:Biodegradation, Environmental; D005308:Fertilizers / Q000382:microbiology; D005399:Fishes; D019649:Food Industry; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste; D059027:Recycling / Q000379:methods*; D012037:Refuse Disposal / Q000379:methods*; D013696:Temperature
chemical_list: D000596:Amino Acids; D005308:Fertilizers; D007220:Industrial Waste