| 摘要 |
<p>In the process, the thickening filtrate arising from the dispersion of waste paper is directly fed to a biological waste water clarification, in order by this means to prevent the excessive accumulation of a COD load in the waste paper dispersion water circuit and other production water circuit, by which means the end product produced can have a lower COD load and, as a consequence thereof, savings can be made, for example, in starch in a possible surface sizing. According to a first embodiment, the biologically clarified waste paper filtrate is immediately reused for waste paper dispersion. However, according to a second embodiment, the clarified waste paper filtrate is discharged as works waste water into the outfall and all of the surplus water from the paper factory is used for waste paper dispersion. It is further proposed to reuse the thickened clarified sludges in the waste paper dispersion.</p> |
