Treating solid dairy manure using microwave-enhanced advanced oxidation process.
The microwave enhanced advanced oxidation process (MW/H(2)O(2)-AOP) was used to treat separated solid dairy manure for nutrient release and solids reduction. The MW/H(2)O(2)-AOP was conducted at a microwave temperature of 120 degrees C for 10 minutes, and at three pH conditions of 3.5, 7.3 and 12. The hydrogen peroxide dosage at approximately 2 mL per 1% TS for a 30 mL sample was used in this study, reflecting a range of 0.53-0.75 g H(2)O(2)/g dry sludge. The results indicated that substantial quantities of nutrients could be released into the solution at pH of 3.5. However, at neutral and basic conditions only volatile fatty acids and soluble chemical oxygen demand could be released. The analyses on orthophosphate, soluble chemical oxygen demands and volatile fatty acids were re-examined for dairy manure. It was found that the orthophosphate concentration for untreated samples at a higher % total solids (TS) was suppressed and lesser than actual. To overcome this difficulty, the initial orthophosphate concentration had to be measured at 0.5% TS.
Kenge
Anju A
AA
Department of Civil Engineering, University of British Columbia, Vancouver, BC, Canada.
Liao
Ping H
PH
Lo
Kwang V
KV
D000818:Animals; D005227:Fatty Acids / Q000737:chemistry / Q000378:metabolism; D006358:Hot Temperature; D006861:Hydrogen Peroxide / Q000494:pharmacology; D006863:Hydrogen-Ion Concentration; D008372:Manure / Q000528:radiation effects*; D008872:Microwaves; D010084:Oxidation-Reduction / Q000528:radiation effects; D010100:Oxygen / Q000737:chemistry / Q000378:metabolism; D010710:Phosphates / Q000737:chemistry / Q000378:metabolism; D012037:Refuse Disposal / Q000379:methods*; D013997:Time Factors; D014835:Volatilization
D005227:Fatty Acids; D008372:Manure; D010710:Phosphates; D006861:Hydrogen Peroxide; D010100:Oxygen