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Method for purifying slight pollution sewage through waste sulfuric acid picking liquid

A sulfuric acid pickling, micro-pollution technology, applied in chemical instruments and methods, water/sludge/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problem of high introduction cost and treatment cost, secondary aluminum salt treatment agent The problems of pollution and high cost of chemical agents can achieve the effect of low processing cost, short reaction time and cost reduction.

Inactive Publication Date: 2015-11-25
陈雷
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. The treatment needs to introduce the sewage into the sewage treatment plant, and then introduce the fresh water source. The disadvantage is that the introduction cost and the treatment cost are high
[0004] 2. Biofilm technology is a "attached growth" sewage treatment method, but the treatment cost is high and it is difficult to be widely used
However, the cost of the above-mentioned chemical agents is high, and the aluminum salt treatment agent will also produce secondary pollution

Method used

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  • Method for purifying slight pollution sewage through waste sulfuric acid picking liquid

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] like figure 1 As shown, this embodiment includes slightly polluted sewage, reactant 1, uniform stirring, reactant 2, reaction conversion, flocculation degradation, and reaction completion.

[0019] During work, according to the weight of slightly polluted sewage (detecting its chroma is 20 degrees, suspended solids is 36mg / L, and other indicators are normal), add reactant 1 (detecting its composition to be sulfuric acid) in the sewage by spraying with a sprayer 4.5%, the total iron content is 10%) 5 parts, stir and dissolve with electric stirrer (rotating speed is 300 revs / min), evenly add reactant 2 (detection its composition is calcium oxide 50%, sodium hydroxide 50%) 1 part for reaction transformation, after stirring for 10 minutes, the measured pH value was 6.5, then evenly added reactant 2, the addition amount was 1 part and carried out reaction conversion, after stirring for 10 minutes, the measured pH value was 7.75, stop stirring After 2 hours of standing still...

Embodiment 2

[0021] like figure 1 As shown, this embodiment includes slightly polluted sewage, reactant 1, uniform stirring, reactant 2, reaction conversion, flocculation degradation, and reaction completion.

[0022] When working, according to the weight of micro-polluted sewage (detected its chroma is 56 degrees, suspended matter is 76mg / L, fluoride is 0.17mg / L and other indicators are normal), add the reactant in the sewage by spraying it with a sprayer 1 (the composition of which is detected as sulfuric acid 5.2%, and the total iron content is 11%) 10 parts, stir and dissolve with an electric stirrer (rotating speed is 300 rpm), slowly add reactant 2 after the dissolution is completed (the composition of which is detected as oxidation Calcium 66.7%, sodium hydroxide 33.3%) 4 parts are carried out reaction transformation, and after stirring for 10 minutes, the pH value measured is 8.1, stop stirring, after standing still for 2 hours, the sewage pollutants flocculate and settle to the bo...

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Abstract

The invention belongs to the technical field of sewage treatment, and particularly relates to a method for purifying slight pollution sewage through waste sulfuric acid picking liquid. The method includes the following steps: 1, first reactants are added according to the pollution degree of the slight pollution sewage and evenly stirred; 2, second reactants are added according to the PH value of the sewage obtained after the first reactants are added, the second reactants and the first reactants are reacted to increase the PH value of the sewage, even stirring is carried out after the second reactants are added, the reaction time is 10 minutes, and the sewage is completely treated after flocculation and degradation are carried out for two hours; wherein the whole reaction is carried out at the normal temperature. According to the method, the whole technological steps are simple and reasonable, the treatment cost is low, the treatment effect is good, the waste acid picking liquid is completely recycled, control is easy, and the treatment time is short.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, in particular to a method for purifying slightly polluted sewage with sulfuric acid pickling waste liquid. Background technique [0002] The environment is "born and prospered by water". However, with the rapid development of the economy and the acceleration of urbanization, the problems of water pollution and ecological degradation in many cities in my country are very serious. Oxygen-consuming organic pollutants and nitrogen and phosphorus nutrients The content remains high, and even seasonal and perennial water black and odor phenomena appear. Therefore, solving the pollution of urban sewage and restoring the ecological and social functions of the environment is still one of the key tasks to be solved in the process of sustainable development of many cities. Therefore, through technological innovation, the use of sulfuric acid pickling waste liquid, ferrous sulfate, calcium oxide, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
Inventor 陈雷
Owner 陈雷
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