| 摘要 |
<p>A method of treating waste water is characterized in that it includes phases, in which sludge particles included in the waste water are caused by filtering to attach (10) to hydrophobic organic grains (24), like hydrophobic grains of peat, grains are carbonized by composting (17), and carbonized grains are used as a substrate and carbon source (32, 34) in biological phases (11, 12) of the treatment of waste water. Grains are hydrophobized by drying (18) after composting (17). Grains may be circulated in the process (39, 29) 5 to 10 times, for example. The method may be applied to biological purification of waste water and production of biogas from waste water sludge in a digester. In the method of the invention, sludge is treated and destroyed meanly by means of itself, and the remaining part of it is in solid form and, as hygienized, non-hazardous and suitable for many uses.</p> |
