Treatment process of low-temperature and low-turbidity water with iron and manganese exceeding standards

Abstract

The invention discloses a treatment process of low-temperature and low-turbidity water with over-standard ferro-manganese. The treatment process comprises the following steps: carrying out water-source water floatation treatment, adding a water-source water reaction nucleus, adding quicklime powder at a water inlet of water-source water, adding an oxidizing agent into a water inlet pipeline of the water-source water, and additionally arranging a water-source water automatic control system. The process has the advantages that suspended solids (SS) can be effectively removed; 2, total phosphorus is effectively removed; 3, water source water oxygen ions are effectively increased, and CO2 is reduced; 4, the total nitrogen is effectively removed under the action of increasing oxygen and an oxidizing agent; 5, iron and manganese are effectively removed under the oxidation effect; 6, the turbidity value is effectively reduced and can be controlled to be about 1NTU; 7, the filtering efficiency of the filter tank and the yield are improved; 8, the labor intensity of workers is reduced; 9, the quality of outgoing water can be effectively improved; 10, water resources can be effectively saved; 11, the improvement of the system makes up the production shortages of the existing running waterworks; 12, the investment is saved, the effect is quick, and the existing water treatment process is combined, so that the energy consumption is basically avoided.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a treatment process for low-temperature, low-turbidity water with excess iron and manganese. Background technique [0002] In the vast areas of our country, most of the source water of local waterworks is surface water such as reservoir water, river water, and lake water. The long-term precipitation and accumulation of these surface waters lead to low turbidity before being treated by the water plant. Generally, the turbidity is below 30NTU in the rainy season and below 10NTU in the dry season. In surface water, under natural conditions, iron and manganese basically sink in the second-order state and accumulate in the middle and lower layers of the water layer, just above the water intake level of the waterworks. [0003] At present, the current status of water pretreatment and sedimentation process of waterworks in my country basically draws on the common i...

AI Technical Summary

Problems solved by technology

3. There are few reaction nuclei in low turbidity water, the collision between them is reduced, and the flocculation effect is poor

4. There are few reaction nuclei in low turbidity water, and the net catch ability becomes poor, which makes it difficult to adsorb and precipitate ferric manganese

5. In the divalent state, iron and manganese exist in water in a solid form. Because the particle molecules are small, it is difficult to precipitate in a short time, and the sand filter cannot filter out 100%

6. The second-order iron and manganese in water cannot be 100% filtered out in the manganese sand filter process.

7. Iron and manganese exceed the standard. After the disinfectant is put into the house, the iron and manganese will be converted into a trivalent state by oxidation in the divalent state, so that the chromaticity of the factory water will exceed the standard.

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