A major source of sludge in water treatment

In water treatment projects, the main sources of sludge are as follows:

1. Grid slag: grid or filter screen, in the shape of garbage, small amount, easy to handle and disposal;

2. scum: scum and floating pool, may contain more oil, less amount;

3. Slag in the settling pond: the settling pond is composed of inorganic particles with a large proportion and a small amount;
4. Primary settling sludge: Primary settling tank, mainly inorganic substances, large quantity, easy to rot and smell, may contain insect eggs and pathological bacteria, is the object of sludge treatment;
5. Secondary sludge: secondary sedimentation tank, residual activated sludge, organic matter, high moisture content, easy to decay and smell, difficult to dehydrate, is the main object of sludge treatment;

In addition, in the process of water supply treatment, in the raw water is purified will also produce a variety of sludge, mainly a variety of chemical sludge, that is, after chemical treatment, in addition to containing the original wastewater suspended solids, but also contains chemical agents produced by the sediment, easy dehydration and compaction.

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