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• Coagulation
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Sludge De-watering
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• Drinking Water
• Boiler Treatment
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• Odor Control
• Custom Formulation
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The Benefits of Using Cesco Solutions’ Chemistry to More Completely De-water Sludge in Wastewater

The separation of suspended solids from wastewater influent and the accumulation of biomass from clarifiers lead to large quantities of sludge. This sludge, separated from the treated water, usually contains more than 90% water and can be highly biodegradable. With the implementation of stricter clean water acts by municipalities and increased surcharges for load levels in effluent discharge, there is increased pressure for more efficient wastewater treatment plants. This efficiency will lead to increased quantities of sludge. What is often overlooked in wastewater treatment is the cost of handling the larger quantities of sludge produced by the treatment plant. The question of how the sludge can be managed in a safe, practicable and sustainable manner is often ignored. In many cases, sludge treatment and disposal can account for up to half of the overall wastewater treatment costs.

The disposal of sludge is achieved in different ways depending on the industry. In the paper industry, the primary and secondary clarifier sludge is normally burned in the boiler furnaces. In the food industry, the sludge is sent to a rendering plant, composted, landfilled, dumped at sea, or incinerated. In the refinery industry, the sludge is placed in a landfill or is burned. In most cases it is more cost effective to de-water the sludge for the following reasons:

• Reduce volume and weight
• Increase by-product recovery
• Recover food processing waste for animal feed
• Increase ease of incineration

For incineration, water in sludge requires large quantities of BTUs to be evaporated. In by-product recovery, the sludge is generally heated to extract materials and it requires more energy to heat water then the solids. The hauling of the sludge prior to de-watering requires a vacuum truck as it has a consistency of a liquid. After de-watering the sludge can be handled as a solid. The de-watering of sludge can be achieved using many mechanical means, from a centrifuge to a belt press. All of this mechanical de-watering equipment requires a preconditioning of the sludge prior to de-watering for optimal performance. At Cesco Solutions we work with the client and equipment manufacturers to achieve optimal sludge dryness. Using a diagnostic approach, Cesco Solutions will find the best combination of chemistry to help meet the financial and environmental goals of the client.

   
   
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