Treatment of high density poultry manure by anaerobic pecked bed reactor

Key words: 
• anaerobic pecked bed reactor /
• pig waste /
• anaerobic treatment

Abstract: In order to research on a highly-effective disposal of poultry manure through anaerobic biotechnology, an efficient anaerobic reactor with an effective volume of 20 L was designed according to the characteristics of anaerobic pecked bed reactor. Pen manure as raw material for fermentation, the raw water COD was adjusted between 4 820 and 54 000 mg/L.The whole process was 55 days, which was divided into two stages according to the raw of hydraulic retention time: the prophase (44 d) and the anaphase (11 d),in the prophase the dealing concentration of reactor was directly advanced by increasing the raw water concentration, the hydraulic remain time (HRT) was maintained 2 days, 7～8 days per cycle. In the anaphase, the dealing concentration of reactor was indirectly advanced by shortening the residence time, and the influent concentration was unchanged, 2～3 days per cycle. COD, pH, volatile components and the content of TN，TP and NH3-N were determined through to the whole procession in the anaerobic treatment system, and analysis of operating characteristics of the system.Results demonstrated that in the fermentation section 1～55 d, the whole system could be stably operated, with a stable COD removal efficiency which were between 67% and 88%; and high capacity in removing TN,TP and NH3-N.