Abstract
The largest problem of domestic anaerobic digestion is low digestion efficiency. Reasons of the problem would be low organic matters input, low mixing efficiency in digestion tank, refractory excess sludge etc.. In this study, screw attached disk-type concentration system and a mechanical mixing system, solubilization facility improvements were performed to solve problems.
Through these improvements, the sludge conc. of the concentrator increased 2.6-fold and the volume reduction efficiency was increased 3.0-fold. In addition, the dead-space is reduced by mechanical agitation. Anaerobic digester gas production in the digestion tank is increased from 193.8 m^3 to 386.0 m^3 per day. Digestion efficiency is improved to 54.6% from 47.6%. Digestion gas production is increased from 0.30 Nm^3/kg VS to 0.42 Nm^3/kg VS.
Through these improvements, the sludge conc. of the concentrator increased 2.6-fold and the volume reduction efficiency was increased 3.0-fold. In addition, the dead-space is reduced by mechanical agitation. Anaerobic digester gas production in the digestion tank is increased from 193.8 m^3 to 386.0 m^3 per day. Digestion efficiency is improved to 54.6% from 47.6%. Digestion gas production is increased from 0.30 Nm^3/kg VS to 0.42 Nm^3/kg VS.
| Translated title of the contribution | A Study of the Improvement in an Anaerobic Digester for Sludge Reduction |
|---|---|
| Original language | Korean |
| Pages (from-to) | 516-522 |
| Number of pages | 7 |
| Journal | 대한환경공학회지 |
| Volume | 33 |
| Issue number | 7 |
| DOIs | |
| State | Published - Jul 2011 |