Sedimentation and filtration Two key aspects of sludge solid−liquid separation processes for which fundamental theoretical representations exist are gravitation (or ‘sedimentation’) and filtration. These expressions can be used to inform the extent of separation of solids from the liquid and/or the energy required for certain thickening or dewatering processes. Sedimentation is the separation of particles…
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…
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…
In order to sell the liquid hydrocarbons that are produced by oil producing wells, they need to meet specifications that define the maximum allowable amount of water and salt, along with other impurities. Unfortunately, the liquid hydrocarbons that are produced by the wells seldom (if ever) match these requirements. So, there will always be some…
Sludge poses significant problems for wastewater treatment plants. With its pathogen content and unstable nature, sludge is a hazard to both human health and the environment. What can we do about it? The answer is to aggressively process it, reduce pathogen levels, and stabilize the biosolids. There are several traditional sludge processing methods — namely…
We summarizes some experience and skills to help you improve the processing capacity and reduce the operation cost. The on-site management and operation personnel of the sludge dewatering machine need to constantly observe and adjust in time, so as to achieve the best state and relatively stable cooperation in various changes as far as possible….
Low energy consumption, small footprint, high cost effectiveness and wide range of applications make the screw sludge dewatering machine a dramatic rise in industrial wastewater treatment. High efficiency and automation are the unanimous praise of users. So how does it work? Here is a brief introduction to its working principle and main components. The dewatering…