In this article we will discuss about the characteristics and quantity of sludge produced in various sewage treatment processes. Characteristics of Sludge: Sludge consists of organic and inorganic solids present in the raw sewage and removed in the primary settling tanks plus organic solids produced during secondary treatment of sewage and removed in the secondary settling tanks. The characteristics and [...]
The methods used to treat and dispose sludge are: 1. Thickening of Sludge 2. Digestion or Stabilisation 3. Conditioning 4. Dewatering 5. Drying 6. Incineration or Thermal Reduction 7. Ultimate Disposal. 1. Thickening of Sludge: Sludge thickening is commonly achieved by the following three methods: (i) Gravity Thickening: Gravity thickening is the most common practice for concentration of sludges as [...]
In this article we will discuss about:- 1. Types of Anaerobic Sludge Digesters 2. Capacity of Standard Rate or Low Rate Sludge Digesters 3. Anaerobic Digester Elements 4. Performance of Digesters. Types of Anaerobic Sludge Digesters: The anaerobic sludge digesters are of the following two types: (a) Standard rate or Low rate or Conventional sludge digesters (b) High rate sludge [...]