title: Removal of humic acid from composted hog waste by the white-rot fungus, Phanerochaete chrysosporium.
abstract: The potential hazards of humic acid (HA) associated with hog waste effluent, coupled with increasing awareness of environmental problems, have prompted many countries to control disposal of effluents into water bodies and to maximize removal of HA. Here we employed the white-rot fungus, Phanerochaete chrysosporium, to degrade the HA in composted hog waste effluent, evaluated by the response surface method. Preliminary experiments demonstrate that pH, temperature and quantity of inoculum are significant variables determining success of the fungus. In total, 13 experiments were conducted with three variables designated as A (pH), B (temperature) and C (inoculum amount). The optimal conditions for reduction of HA by P. chrysosporium are pH 6, 31.5°C and an inoculum quantity of 5.86 g. Predicted and experimental results exhibit strong agreement, indicating efficiency in the model obtained by response surface method. Therefore, P. chrysosporium is an effective micro-organism for removal of HA from composted hog waste effluent.
authors.affiliation: The Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang 330047, China E-mail: liuhailinshef@hotmail.com.
authors.forename: Junying
authors.initials: J
authors.lastname: Liu
authors.affiliation: The Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang 330047, China E-mail: liuhailinshef@hotmail.com.
authors.forename: Yunmeng
authors.initials: Y
authors.lastname: Song
authors.affiliation: Center for Biorefining, Bioproducts and Biosystems Engineering Department, University of Minnesota, 1390 Eckles Ave., St Paul, MN 55108, USA.
authors.forename: Roger
authors.initials: R
authors.lastname: Ruan
authors.affiliation: The Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang 330047, China E-mail: liuhailinshef@hotmail.com.
authors.forename: Yuhuan
authors.initials: Y
authors.lastname: Liu
mesh_terms: D000818:Animals; D001673:Biodegradation, Environmental; D006812:Humic Substances / Q000032:analysis / Q000382:microbiology*; D020075:Phanerochaete / Q000737:chemistry / Q000378:metabolism*; D012987:Soil / Q000737:chemistry*; D013552:Swine; D013696:Temperature; D014865:Waste Disposal, Fluid; D062065:Wastewater / Q000737:chemistry / Q000382:microbiology*
chemical_list: D006812:Humic Substances; D012987:Soil; D062065:Wastewater