Sludge treatment

Sludge TreatmentBy Indrajith Attanayake1

What is sludge treatment?Sludge treatment is the processes used to manage and dispose of sewage sludge produced during waste water and drinking water treatment.

Sludge is mostly water with lesser amounts of solid material removed from liquid sewage.

We can Identify physical and chemical characteristics in sludge2

Sludge types Humus sludge, Activated sludge, Digested sludge Physical Moisture, density, color, texture, plasticity / Chemical Organic matter, Volatile solids, Nitrogen, phosphate Sources of sludge are domestic sewage, Industrial Sewage, Water treatment plantThe choice of a sludge treatment method depends on the volume of sludge generated, and comparison of treatment costs required for available disposal options

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Treatment processesThickening Gravity and Floatation

Digestion Aerobic , Anaerobic

Mechanical Dewatering Vacuum filtration , Centrifugation

Disposal Land application , Burial 3

Many sludges are treated using a variety of digestion techniques,Purpose is reducing amount of organic matter and reduce disease causing micro organismsMost common treatment including anaerobic digestion, aerobic digestion, compositingAnaerobic digestion is a biological process that uses bacteria in an oxygen free environment.These bacterias convert volatile solids into CO2, Methane and ammonia.

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Sludge treatment Design

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Advantages of sludge treatmentIt reduces pathogens and volume to be disposed.Protects wild life , aquatic life and also prevents diseases.Sustainable management of Organic waste.Reduction of odors and disease causing agents.Producing Bio gas

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Thank you!Reference: http://www.slideshare.net/ http://www.biogas-renewable-energy.info/ en.wikipedia.org www.juliantrubin.com

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