Electrochemical oxidation of the effluent from anaerobic digestion of dairy manure.
The electrochemical oxidation of the digested effluent from anaerobic digestion of dairy manure was investigated in this study. The digested effluent sample containing with suspended solids was pretreated by filtration for the electrochemical experiment. The influence of direct anodic oxidation and indirect oxidation was evaluated through the use of dimensionally stable anode (DSA) and Ti/PbO2 as anode. The decreasing rate of chemical oxygen demand (COD) was higher at lead dioxide coated titanium (Ti/PbO2) electrode than at DSA, however the DSA was preferred anode for the decrease of ammonium nitrogen (NH4-N) due to the control of ammonium nitrate (NO3-N) accumulation. The results showed that the filtration of suspended solids as a pretreatment and addition of NaCl could improve the whole removing efficiency of NH4-N in the digested effluent on electrochemical oxidation.
Ihara
Ikko
I
Department of Agro-Environmental Science, Obihiro University of Agriculture and Veterinary Medicine, Obihiro 080-8555, Japan.
Umetsu
Kazutaka
K
Kanamura
Kiyoshi
K
Watanabe
Tsuneo
T
D019149:Bioreactors; D001709:Biotechnology / Q000379:methods*; D003612:Dairying; D004563:Electrochemistry / Q000379:methods*; D008372:Manure; D008567:Membranes, Artificial; D009584:Nitrogen / Q000737:chemistry; D010084:Oxidation-Reduction; D010100:Oxygen / Q000737:chemistry / Q000378:metabolism; D000644:Quaternary Ammonium Compounds / Q000737:chemistry; D014865:Waste Disposal, Fluid
D008372:Manure; D008567:Membranes, Artificial; D000644:Quaternary Ammonium Compounds; D009584:Nitrogen; D010100:Oxygen