Pulp and Paper

At CHENENG Environmental, we’re redefining wastewater treatment for the pulp and paper industry. Our innovative solutions are tailored to address the unique challenges faced by mills of all sizes, from small specialty paper producers to large integrated pulp and paper facilities. We understand that your wastewater contains high levels of suspended solids, BOD, COD, and color compounds, and our advanced treatment systems are designed to tackle these issues efficiently and cost-effectively.

Challenges in Pulp and Paper Wastewater Treatment

The pulp and paper industry generates large volumes of wastewater that are complex and difficult to treat. Typical issues include:

High levels of suspended solids (SS) that are hard to settle with conventional methods
Elevated concentrations of chemical oxygen demand (COD) and biochemical oxygen demand (BOD)
Fluctuating wastewater characteristics depending on the production cycle
Large amounts of sludge requiring further treatment and disposal
Increasingly strict environmental discharge standards

These challenges demand efficient and reliable treatment solutions that can help facilities maintain compliance while keeping operational costs under control.

The paper industry requires enormous amounts of water during production, especially when making pulp and bleaching paper. Workers use water to break down materials like wood, plant fibers, or recycled paper into pulp. If using old paper, an extra step is needed to remove previous ink markings. These processes create lots of dirty water and waste sludge. Statistics show that producing 1 ton of pulp uses 17,000 gallons (about 64,350 liters) of water. This massive water usage and energy consumption make paper mills one of the most resource-intensive industries worldwide.

Paper mills use crazy amounts of water and electricity, so they need better cleaning methods. The dirty water from production contains mud, floating junk, toxic chlorine chemicals, and oxygen-consuming pollutants. Cleaning this water requires two steps at the factory: first filtering out big particles, then using tiny organisms to break down the gunk. With good equipment design, the cleaned water can be reused, saving tons of fresh water. After cleaning, the leftover sludge becomes another headache – factories make truckloads of this goo every day. To tackle paper wastewater, settling tanks and bubble separators work best. For sludge, hydraulic presses squeeze out the water, turning it into dry blocks that can be safely burned.

Our Solution: Efficient Equipment for Pulp and Paper Wastewater

Wuxi Cheneng provides a comprehensive range of wastewater treatment equipment tailored to the specific needs of the pulp and paper industry. Our solutions are designed to enhance treatment efficiency, reduce operational costs, and ensure compliance with environmental regulations.

Key Equipment We Offer:

Dissolved Air Flotation (DAF) Units
Effectively remove suspended solids, reduce COD and BOD, and improve water clarity.
Bar Screens and Rake Machines
Automatically capture large debris at the early stage of treatment to protect downstream equipment.
Sludge Dewatering Machines
Reduce sludge volume with high dewatering efficiency, lowering handling and disposal costs.
Chemical Dosing Systems
Ensure precise and consistent chemical dosing to optimize treatment performance.
Scraper Systems for Sedimentation Tanks
Continuously collect and remove settled sludge to maintain stable system operation.

All equipment can be customized to meet specific site requirements, and our technical team provides on-site installation guidance and after-sales support.