Technologies for Fiber Recycling. Biological Process Water Treatment in a Zero Discharge Paper Mill Producing Waste Paper Based Testliner and Fluting Grades.
1999; Japan Technical Association of the Pulp and Paper Industry; Volume: 53; Issue: 5 Linguagem: Inglês
10.2524/jtappij.53.590
ISSN1881-1000
Autores Tópico(s)Advanced Cellulose Research Studies
ResumoFor more than 25 years Kappa RPE Zülpich Papier, , a producer of corrugating medium and Testliner, has been operated under complete effluent free conditions and is regarded as a pioneer in process water closure. However, the accumulation of organic compounds as well as the increase of salt content, water hardness and concentration of volatile fatty acids has negative effects on the paper quality and the vapour exhaust of the paper machines. To keep up the system closure, a biological treatment plant was integrated in the closed water circuit. An internal anaerobic/aerobic combination was installed. A part of the total process water stream is purified in the treatment plant and reused as process water. Within a few weeks after start-up, the inline process water treatment plant reached the forecast efficiency with very positive effects on the characteristics of process water, paper and the exhaust of the paper machines.
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