Case study

Fiberboard Industry

This case study was based on a real case.

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Challenge
Opportunity


A manufacturer of fiberwood panels produces 200,000 m3/year of MDF boards. In the manufacturing process, the wood is washed, debarked and subsequently sent to a digester where it is processed into fibers. The water used for washing and cooking of the chips is sent to the WWTP.

The physico-chemical treatment was conducted with PAC 18% (coagulant), hydrated lime (pH adjustment) and anionic polymer (flocculation adjuvant). There were difficulties in treating all the effluent in the tertiary process for the subsequent use of PAC 18% and bentonite clay caused colmatation of the sand filter and the microfiltration system.

Flox®-QT was tested in the laboratory aiming at the improvement of the efficiency of the treatment. Excellent results were also achieved in subsequent industrial tests, leading to the definitive adoption of Flox®-QT in the WWTP.

Wastewater characteristics


graph_WWC_wood_en

Cost
analysis


Total operation cost reduction: 10% (€/m3 treated effluent)
Total operation cost reduction in tertiary system: 50% (€/m3 treated effluent)

Application
Flowchart


infographic_wood_en

Effluent
after treatment


graph_EAT_wood_en

Treatment
comparison


graph_TC_wood_en

BENEFITS OF THE application
of Flox®-QT


Reduced use of lime as alkalinizing agent in about 80%

Greater stability of the biological treatment through the use of compatible biodegradable product

Total reuse of the treated effluent

Reduced conductivity of the water with significant improvement of tertiary treatment, increasing the durability of equipment (filters, membranes)

Rationalization of manpower

Improved health and operational safety of the operators through the use of product is not classified as dangerous on the UN list
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