What kinds of sludge are included

      Belt filter press knowledge about what kinds of sludge include：

Sludge is a general term for all kinds of sediments and floating objects produced in different treatment processes of water supply and wastewater treatment.The composition and nature of sludge mainly depend on the composition, nature and treatment technology of sludge.According to different classification standards, sludge has a variety of classification methods, described as follows.

(1) According to the source of sludge, it can be roughly divided into three categories: water supply sludge, domestic sewage sludge and industrial wastewater sludge.

(2) According to the process of sludge separation from water, it can be divided into sedimentation sludge (including physical sedimentation sludge, coagulation sludge, chemical sludge) and biological treatment sludge (referring to sewage sludge generated in the secondary treatment process).Modern sewage treatment plant sludge is mostly a mixture of sedimentation sludge and biological treatment sludge.

(3) According to the composition and nature of sludge, it can be divided into organic sludge and inorganic sludge.With organic matter as the main component of organic sludge can be referred to as sludge.Organic sludge is hydrophilic sludge.Domestic sewage sludge or mixed sewage sludge are organic sludge.Inorganic sludge with inorganic substances as the main component is often called sediment. The sediment in the water supply treatment sand settling tank and some industrial wastewater physical and chemical treatment process is sediment. Inorganic sludge is generally hydrophobic sludge.

(4) according to the classification of sludge in different treatment stages, there are raw sludge, concentrated sludge, digestion sludge, dehydration and drying sludge, dry sludge and sludge incineration ash.This method is a commonly used method for sludge classification.

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