Paper manufacturing involves many chemical processes that drive the emission of nitrogen dioxide (NO2), sulfur dioxide (SO2), and carbon dioxide (CO2). Nitrogen dioxide and sulfur dioxide are major contributors of acid rain, whereas CO2 is a greenhouse gas responsible for climate change. In addition, wastewater discharge for pulp and paper mills often contains alcohols, chelating agents, and inorganic materials like chlorates and transition metal compounds. Furthermore, chlorine and compounds of chlorine are used...
The Pulp & paper industry is characterized by high operational water usage. Rising water costs due to increasing water scarcity and more stringent environmental regulations have led pulp and paper companies to seek innovative and efficient water treatment solutions to assist them to reduce their water footprint, decrease operational cost and maintain regulatory compliance. Therefore, water quality management and conservation through the utilization of an advanced pulp and paper water treatment system is...
Sedimentation, flotation, mixing, pulp separation and chemical recovery systems are among the myriad of process equipment WesTech supplies to the pulp and paper industry. Customized to the unique needs of operating plants, WesTech liquid/solids and liquid/liquid separation expertise is built upon years of working with plant operators and owners. The result is a working relationship and reliable process.
Ragger wires, also known as “pulper tails” and “pulper ropes”, are reject secondary raw materials that are created when waste paper is recycled. Ragger wires consists of the plastic trimmings, staples, tape, labels and baling wire found in baled post-consumer paper waste. It is made up of approximately 45% steel and 55% post consumer waste and must be removed from the pulper.
The Procal 2000 emissions analyser is ideally suited to the harsh environments associated with Paper & Pulp Plants. The in situ, multi-component Continuous Emission Monitoring (CEM) system has an integrated auto-zero and calibration facility, thereby removing the need for intervention by maintenance staff under normal conditions.
We designed, engineered, and fabricated this process vessel for use within an FRP scrubber, in a pollution control/waste elimination system. The vessel had to meet specific gravity specifications and be able to sustain pressures of 20″ WC, 100 mph wind loads, as well as seismic zone requirements. Integration into the FRP scrubber system called for the installation of 12 individual flanged nozzles, air inlet and outlet flanges, 6 side and top bolted manways, header clips, and much more. In addition, to...
In the paper & pulp industry there are many screening applications for pulp and coatings where Trislot® wedge wire screens are used, thanks to the following characteristics: very precise slots for fine screening, high strength, all welded structure, non clogging slots, low maintenance, custom made.
Only accurately selected and purified bentonites can be employed in paper production, in order to ensure the best performance. There are different bentonites for different production processes. The main features of these bentonites are: high cationic exchange capacity, antipitch function to avoid lumps, and suspension capability. The beneficial effects of bentonite on production quality, printing, discharge waters, and, in general, from an economic point of view, should not be underestimated.
Bioaugmentation consists in an increase of selected bacteria that will help naturally the process of biological degradation of organic compounds.
BIODIGESTOR can be applied in the biological treatment of an industrial waste-water treatment, like pulp & paper, increasing its efficiency.