Sludge Digestion

Sludge Digestion

Sludge Digestion
One of the greatest problems associated with sewage treatment is the treatment and disposal of the resulting sludge. One million gallons of sewage produces 15-20 tons of sludge. Sludge is a thick black mass containing 95 % water and it has a revolting odour.

Some methods of sludge disposal are digestion, sea disposal and land disposal (composting).

Large Scale Sewage Treatment (Sewage Treatment in Sewered Areas
Primary/Physical/Preliminary Treatment
Removal of grit (Grit/Detritus Chamber)
Removal of fatty oils (skimming tanks)
Sedimentation (Primary sedimentation)
Secondary Treatment
Trickling Filter System
Rotating Biological Contractor or Biodisc System
Oxidation Lagoons
Activated Sludge Process
Modification of Activated Sludge Process(ASP)
Biological Processes for Removal of Nitrogen by ASP
Removal of Excess Phosphates
Submerged Aerobic Filters
Sedimentation (Secondary Sedimentation)
Sludge Digestion
Anaerobic digestors (sludge digestion)
Factors important for anaerobic digestion
Tertiary Treatment
Applications of Waste Treatment Saccharification
Saccharification Processes
Simple Dilute-acid Hydrolysis of Wood
Details of the process
Percolation Processes
Strong Acid Processes for Wood Saccharification
General Problems of Saccharification Processes
Gasification
Process of Gasification
Biomethanation (Anaerobic gasification)
Pelletisation Technology
Plasma arc (pyro-plasma process)
Garret flash pyrolysis process
Vast global potential
Composting
Bangalore Method (Hot Fermentation Process)
Mechanical Composting (Indore Process)

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