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Efficient dephosphorization process

An efficient and technological technology, applied in aerobic process treatment, water/sewage multi-stage treatment, multi-stage water treatment, etc., can solve problems such as easy clogging of pipelines, inability to meet the needs of phosphorus removal in liquor brewery sewage, and inability to meet other problems.

Active Publication Date: 2021-05-11
CHENGDU RUIDA ELECTRICAL MACHINERY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the phosphorus removal agent A can only be used when the pH of the sewage is 7.5-8.5, and the phosphorus removal agent B can only be used when the pH is 6.5-7.5. The pH of the sewage needs to be adjusted, and it is also easy to block the pipeline, which cannot meet the needs of liquor production sewage. Phosphorus removal needs
[0006] CN105502610A discloses a high-efficiency sewage phosphorus removal flocculant. The composition of the high-efficiency sewage phosphorus removal flocculant is: water, 30-40 parts; potassium perchlorate, 4-8 parts; sodium silicate, 20-30 parts; Iron, 25 to 35 parts; a mixture of aluminum sulfate and magnesium sulfate, 35 to 45 parts; wherein, the weight ratio of aluminum sulfate and magnesium sulfate is 3 to 5:1, but this sewage dephosphorization agent mainly treats phosphorus content up to 6mg / L of domestic sewage cannot meet the demand for phosphorus removal in liquor brewery sewage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0024] The preparation method of the high-efficiency dephosphorization agent comprises: uniformly stirring ferrous sulfate, magnesium chloride and polyaluminum chloride in an environment with an air humidity of less than 50%, and then baking at 45° C. for 30 minutes to prepare the high-efficiency dephosphorization agent.

[0025] Further, the dephosphorization agent is ferrous sulfate, magnesium chloride, and polyaluminum chloride in a mass ratio of 1-3:5-8:2-5.

[0026] Preferably, the added amount of the dephosphorization agent is 0.05%-0.1%.

[0027] Further, the anaerobic reaction in step d includes performing anaerobic reaction and moderate anaerobic reaction on the supernatant liquid I in sequence.

[0028] Preferably, the deep anaerobic reaction described in step d adopts an IC reaction tower.

[0029] Preferably, the moderate anaerobic reaction described in step d adopts a UASB reactor.

[0030] Further, the aerobic reaction in step e includes passing the supernatant...

Embodiment 1

[0035] Take 50Kg, 300Kg, and 150Kg of ferrous sulfate, magnesium chloride, and polyaluminum chloride respectively, stir ferrous sulfate, magnesium chloride, and polyaluminum chloride evenly in an environment with air humidity less than 50%, and then bake at 45°C for 30 minutes to prepare Dephosphorization agent 500Kg.

[0036] 800KL of sewage after liquor brewing is passed through the automatic grid to remove solid impurities and then passed into the comprehensive adjustment tank. The TP of the sewage is 310mg / L, the pH of the sewage is 5, the above-mentioned dephosphorization agent is added, and then the sewage is passed into the sedimentation tank. Place precipitation, obtain sludge I and supernatant I, the content of phosphorus in the supernatant I is 60mg / L.

[0037] The supernatant I was hydrolyzed and acidified, and then passed into the IC reaction tower and UASB reactor for anaerobic reaction, and the sludge II and the supernatant II were obtained by precipitation. The ...

Embodiment 2

[0040] Take 100Kg, 320Kg, and 180Kg of ferrous sulfate, magnesium chloride, and polyaluminum chloride respectively, stir ferrous sulfate, magnesium chloride, and polyaluminum chloride evenly in an environment with air humidity less than 50%, and then bake at 45°C for 30 minutes to prepare Dephosphorization agent 600Kg.

[0041] 800KL of sewage after liquor brewing is passed through the automatic grid to remove solid impurities and then passed into the comprehensive adjustment tank. The TP of the sewage is 395mg / L, and the pH of the sewage is 5.5. Add the above-mentioned dephosphorization agent, and then pass the sewage into the sedimentation tank. Put precipitation, obtain sludge I and supernatant I, the content of phosphorus in the supernatant I is 58mg / L.

[0042] The supernatant I was hydrolyzed and acidified, and then passed into the IC reaction tower and UASB reactor for anaerobic reaction, and the sludge II and the supernatant II were obtained by precipitation. The phosp...

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Abstract

The invention relates to a high-efficiency dephosphorization process, which belongs to the field of sewage treatment. The high-efficiency dephosphorization process of the present invention includes the following steps: a. remove solid impurities in sewage; b. add dephosphorization agent in sewage; c. stand and settle to obtain sludge I and supernatant I; d. obtain The supernatant liquid is subjected to anaerobic reaction and precipitated to obtain sludge II and supernatant liquid II; e. The supernatant liquid II is subjected to aerobic reaction to obtain sludge III and supernatant liquid III. The high-efficiency dephosphorization process of the present invention has good phosphorus removal effect, and can be used for the wastewater produced by liquor with high-concentration phosphorus-containing sewage TP≥300mg / L. "(GB27631‑2011) Table 3 standards, and do not block pipeline equipment.

Description

technical field [0001] The invention relates to a high-efficiency dephosphorization process, which belongs to the field of sewage treatment. Background technique [0002] Phosphorus is one of the main elements sustaining life in the earth system, and it is also an essential element that constitutes living organisms and participates in metabolic processes. However, if the phosphorus content in the water body exceeds 20mg / L, it will lead to eutrophication of the water body, resulting in a large number of algae blooms. After the algae body dies and decomposes, the water body will produce musty and foul odors, which will affect the survival of aquatic organisms such as fish. [0003] In recent years, with the change of food source structure, the content of phosphorus in the sewage produced by winery has become very high, TP≥300mg / L and COD≥30000mg / L in the wastewater produced by liquor production. However, the sewage treatment process of the winery needs to meet the standards i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F1/52
CPCC02F1/52C02F1/5236C02F3/02C02F3/06C02F3/1257C02F3/28C02F3/2846C02F3/2873C02F9/00C02F2001/007C02F2301/08
Inventor 陈林
Owner CHENGDU RUIDA ELECTRICAL MACHINERY IND