In the simplest terms, dewatering is the removal of liquids from a sludge slurry. The process involves using one of three dewatering techniques. The three techniques are plate and frame filter press, centrifuge and belt press. These techniques are used in wastewater treatment plants, power plants, refineries, and drinking water facilities to reduce the volume…
Sewage sludge formed during their mechanical, biological, and physicochemical treatment refers to difficult-to-filter colloidal suspensions, sometimes containing specific inclusions in the form of fats, oils, petroleum products, etc. Currently, the sewage treatment plants (STP) mostly utilize belt filter presses, centrifuges, and multi-disc screw press dehydrators for sludge dehydration. We are well aware of the common…
Wastewater treatment involves many comprehensive steps to remove debris, grits, grease, and other pollutants to produce clean water. It involves several screenings, biological degradation, the addition of chemicals, disinfection, and much more. The first step, though, is the removal of the largest objects in wastewater. For this purpose, we need bar screens. What is a…
Bar screens are automated mechanical systems that remove large solids, such as cans and driftwood, from water streams. Bar screens generally operate in a conveyor-like system. Solids are picked up by a bar or wire filter that allows the water through. The filter is either intermittently or continuously moved through and out of the water…
Shaftless spiral conveyors are designed for the transport of otherwise difficult to handle materials, such as municipal dewatered sludge, wastewater screenings, grit, industrial sludges or other sticky, viscous, stringy materials. Available in two designs, U-trough for horizontal or inclines up to 30 degrees and octagonal (OK-trough) for steeper inclines or vertical transport. Shaftless conveyor can…
The sludge in oil refinery sludge source The sludge in the sewage treatment plant of the oil refinery is composed of oil sludge, scum and residual activated sludge, which is usually called “three sludges”. Oil sludge includes sewage tank bottom sludge and pool bottom sludge. Tank bottom sludge is a mixture of oil, water, mud,…
IEPP Multi-disc Spiral Sludge Dehydrator is a dewatering unit that offers a superior alternative to other dewatering technologies, such as the centrifuge and belt press. It offers clog-free functionality, low energy consumption, simple operation & maintenance, and is suitable for a wide range of applications. Applications The Multi-disc Spiral Sludge Dehydrator is a ‘moving disc…
Dissolved air flotation (DAF) is a proven and effective physical /chemical technology for treating a variety of industrial and municipal process and wastewater streams. DAF systems are commonly used for the removal of oils & greases and suspended solids to meet a variety of treatment goals including: Pretreatment to meet sewer discharge limits Pretreatment to…
Many industries must pretreat their process wastewater before discharging it to the local sewer system. Dissolved air flotation (DAF) systems are used to remove fats, oils, and grease (FOG), certain organics, suspended solids, and metals from process wastewater to meet sewer discharge permit requirements. These treatment systems are far more cost-effective than biological systems but…
process engineered water equipment Dissolved air flotation (DAF) is an effective way of treating wastewater treatment. It is important to know how water is treated because everyone uses water. This knowledge helps you understand how the water that you use is cleaned. This guide teaches you wastewater treatment using the DAF process. Process DAF process…