title: Application of hydrothermal treatment to affect the fermentability of Pinus radiata pulp mill effluent sludge.
abstract: A hybrid technique incorporating a wet oxidation stage and secondary fermentation step was used to process Pinus radiata pulp mill effluent sludge. The effect of hydrothermal oxidation at high temperature and pressure on the hydrolysis of constituents of the waste stream was studied. Biochemical acidogenic potential assays were conducted to assess acid production resulting from anaerobic hydrolysis of the wet oxidised hydrolysate under acidogenic conditions. Significant degradation of the lignin, hemicellulose, suspended solids, carbohydrates and extractives were observed with wet oxidation. In contrast, cellulose showed resistance to degradation under the experimental conditions. Extensive degradation of biologically inhibitory compounds by wet oxidation did not show a beneficial impact on the acidogenic or methanogenic potential compared to untreated samples.
authors.affiliation: Scion. Te Papa Tipu Innovation Park, 49 Sala Street, Rotorua 3046, New Zealand. Electronic address: John.Andrews@scionresearch.com.
authors.forename: John
authors.initials: J
authors.lastname: Andrews
authors.affiliation: Scion. Te Papa Tipu Innovation Park, 49 Sala Street, Rotorua 3046, New Zealand.
authors.forename: Anne-Marie
authors.initials: AM
authors.lastname: Smit
authors.affiliation: Scion. Te Papa Tipu Innovation Park, 49 Sala Street, Rotorua 3046, New Zealand.
authors.forename: Suren
authors.initials: S
authors.lastname: Wijeyekoon
authors.affiliation: Scion. Te Papa Tipu Innovation Park, 49 Sala Street, Rotorua 3046, New Zealand.
authors.forename: Ben
authors.initials: B
authors.lastname: McDonald
authors.affiliation: Scion. Te Papa Tipu Innovation Park, 49 Sala Street, Rotorua 3046, New Zealand; Department of Chemical & Material Engineering, Faculty of Engineering, The University of Auckland, Private Bag 92019, Auckland, New Zealand.
authors.forename: Saeid
authors.initials: S
authors.lastname: Baroutian
authors.affiliation: Scion. Te Papa Tipu Innovation Park, 49 Sala Street, Rotorua 3046, New Zealand.
authors.forename: Daniel
authors.initials: D
authors.lastname: Gapes
mesh_terms: D000693:Anaerobiosis; D000704:Analysis of Variance; D002244:Carbon / Q000032:analysis; D005285:Fermentation; D006358:Hot Temperature; D006868:Hydrolysis; D008031:Lignin / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy; D009584:Nitrogen / Q000032:analysis; D010084:Oxidation-Reduction; D010209:Paper; D028223:Pinus / Q000737:chemistry*; D011134:Polysaccharides / Q000302:isolation & purification; D011312:Pressure; D012116:Resins, Plant / Q000302:isolation & purification; D014865:Waste Disposal, Fluid / Q000379:methods*; D014866:Waste Products / Q000032:analysis*; D018508:Water Purification / Q000379:methods*
chemical_list: D011134:Polysaccharides; D012116:Resins, Plant; D014866:Waste Products; D002244:Carbon; C007916:hemicellulose; D008031:Lignin; D009584:Nitrogen
keywords: Biochemical acidogenic potential assay; Lignocellulose; Resin extractives; Waste minimisation; Wet oxidation