| 摘要 |
<p>The invention is concerned with a device for treatment of wastewater by means of anaerobic fermentation, which comprises a closed tank and a filter for dividing the tank into two superposed compartments, which filter comprises a filter media bed containing at least one filter media acting as an attachment bed for methane bacteria and on it a sludge and fluidized material bed. The device of the invention further includes means for feeding wastewater to be treated into the tank below the filter, means for removing treated water, gas and sludge from the upper compartment of the tank, means below the filter for mixing the contents of the tank, and means for separating gas in the upper part of the tank. The device according to the invention enables the acid and methane reactions to be performed under the conditions best adapted to these reactions without essentially mixing acid and methane producing bacteria with each other.</p> |
