How to choose a township hospital sewage treatment plant

The daily sewage treatment of township hospitals is mainly to remove the floating and suspended solids in the sewage, so as to create good conditions for the subsequent treatment. The selection of sewage treatment equipment in township hospitals is very important. How should the sewage treatment of township hospitals choose hospital sewage treatment equipment according to different situations?

The so-called conventional treatment is a relatively common joint treatment method with simple equipment. Its main equipment and structures include grids, regulating tanks, grit chambers, sedimentation tanks, etc. The grid can remove large particles and floating solids in the water; the function of the adjustment tank is to automatically adjust the unstable sewage treatment flow and balance the quality of sewage; the grit chamber can remove inorganic sand with a particle size larger than 0.2mm; the function of the sedimentation tank It is to remove some suspended particles in domestic sewage, mainly organic particles.

When the concentration of suspended solids in the sewage is low, the removal effect is not obvious, or the suspended solids are gelatinous and difficult to remove, the pretreatment effect can be improved by coagulation sedimentation, filtration and other treatment methods.

According to the different conditions of hospital sewage, the conventional pretreatment process mainly includes the following methods:
1) Sewage → grid → conditioning tank → enter into secondary treatment.
2) Sewage → grit grit chamber → sedimentation tank → then enter 2 stages for treatment.
3) Sewage → grid → sedimentation tank → coagulation sedimentation tank → secondary treatment. In general, the technical requirements for the separation of hospital sewage and sediment are not very high, but the constant change of water volume will have a great impact.

Routine data preprocessing can use the following process:
1) When the stable development of the sewage volume through the system has higher requirements on the separation capacity of inorganic sand and organic suspended solids.
2) When the concentration level of suspended solids in the sewage is low or the suspended solids are in a colloidal state and are difficult to remove.
3) Can be used to make disinfectants play an important role in subsequent analysis and processing.

Due to special circumstances, our processing method should also be adjusted. Because the hospital has some special working conditions, such as laboratory, radiation room, etc., it will discharge special sewage, such as heavy metal sewage, radioactive sewage, printing sewage and oily sewage. Heavy metal sewage in China mainly comes from dental treatment and testing. One of them contains harmful social substances such as mercury and chromium, which can be treated by chemical precipitation or ion exchange; radioactive sewage data comes from different isotope treatment and diagnostic techniques, which can be processed through decay pools; printing wastewater comes directly from the printing of family photos , contains harmful information substances such as silver, developer and fixer. Silver-containing wastewater can be electrolyzed to recover silver. Developers and fixers can be treated by chemical research oxidation; oily water comes from home kitchens, canteens, and hospitals. We need to analyze and pre-process the oil separation method.

The dye concentration of some hospital sewage is generally lower than that of domestic sewage, and is often higher than the secondary discharge standard. If secondary biological treatment is adopted, the investment cost is high. Therefore, according to the treatment requirements, the hospital sewage treatment equipment process can also appropriately select some pretreatment processes that improve the level of the pretreatment process or are called first-level semi-pretreatment processes. The primary pretreatment and semi-pretreatment processes mainly include chemical analysis and treatment of appropriate coagulants. After pre-filtration or simple biological data processing, there is no need for a full secondary biological treatment process.

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