Sludge is a by-product of sewage treatment and has considerable production. Sludge contains water and solid matter, mainly the products transformed from trapped suspended matter and processed colloidal matter and dissolved matter. Sludge collects pollutants in sewage and also contains a large number of bacteria and parasite eggs, so it must be properly treated to prevent secondary pollution. Nowadays, a large amount of unstabilized sludge has become a heavy burden for urban sewage treatment plants and a great threat to the environment. In the construction project of urban sewage treatment plants, it is necessary to configure a
Filter Press and consider the outlet of the sludge to reduce the impact of sludge on the environment. Environmental pollution.
The composition of sludge mainly depends on the sewage water quality, treatment process and methods. The composition of sludge mainly depends on the sewage water quality, treatment process and methods. There are mainly the following types of sludge: primary
Sedimentation Tank sludge, secondary sedimentation tank sludge, screen slag, sand settling sediment and scum, etc. The primary sedimentation tank sludge is mainly composed of organic matter, while the secondary sedimentation tank sludge contains organisms and chemicals. Sludge contains a lot of water. The moisture content of sedimentation tank sludge is generally above 95%. The moisture content can greatly affect the volume of sludge. If the moisture content is reduced from 99.5% to 95%, the sludge volume can be reduced to 1/10 of the original volume.
The characteristic of the membrane filter is that it can perform secondary drying and pressing of the filter cake. The special design of its filter chamber allows it to automatically close the feed valve and pass gas or liquid into the filter chamber after the filter chamber is filled with filter cake. The
Filter Cloth expands and deforms, thereby achieving the effect of secondary squeezing of the filter cake and further reducing moisture. Further introduction of gas will further reduce the moisture in the filter cake. The high-pressure air passes through the filter cake and separates the capillary water, structural water and other moisture in the filter cake. This is the blow drying method.
Generally speaking, from the perspective of urban sewage treatment, Sudong Chemical believes that the resource utilization of urban sewage has become an important issue in water-scarce areas, because urban sewage has been proven to be a reliable water resource, and with the advancement of water treatment technology, sewage regeneration technology Has been widely used. In this case, the structure of the filter press adopts hydraulic compression and automatic pressure maintaining devices, which can produce filter cakes with higher solid content through the pressure generated during filtration. The entire operation process is simple and safe. , and the automation process is high, saving time and effort, and reducing costs.
