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Treating method of high concentration ammonia nitrogen sewage

A treatment method and high-concentration technology, applied in the field of treatment of high-concentration ammonia nitrogen sewage

Active Publication Date: 2011-07-27
杨忠刚
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although there are many methods for treating high-concentration ammonia-nitrogen sewage, there is currently no treatment method that can take into account simple process flow, low investment, mature technology, convenient control and no secondary pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] (1), NH3-N is 5800mg / l catalyst production plant sewage into the reaction tank, first add calcium carbide slag to adjust the pH value of the sewage to greater than 11, then add polyaluminum ferric sulfate flocculant and stir for 40 minutes (PH value Greater than 10), then add PAM and stir for 5 minutes, then let stand for 2 hours.

[0013] (2) After desliming, add H2O2 (with MnO2 as catalyst) and stir for 30 minutes, aerate for 2 hours, then add NaOH and H2O2 and stir for 30 minutes, aerate for 2 hours, and let stand for 2 hours (the aeration temperature should not be lower than 20°C).

[0014] (3), after desliming, stir and add 30% sulfuric acid to adjust the pH value to 7, leave standstill for 30 minutes, and the supernatant NH3-N is 30mg / l.

[0015] (4) The sludge is dewatered by pressure filtration, the filtered water is returned to the reaction tank, and the filter residue is treated separately.

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PUM

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Abstract

The invention relates to a treating method of high concentration ammonia nitrogen sewage, which comprises the comprehensive utilization of carbide slag. The method aims at taking into account of simple process flows, low investment, mature technology, convenient control and no secondary pollution. The treating method comprises all unit processes of chemical flocculation, chemical oxidation, blowing-off and chemical neutralization; and after the high concentration ammonia nitrogen sewage is treated, the NH3-N can be reduced to be less than 40mg / l.

Description

technical field [0001] The invention relates to a treatment method for high-concentration ammonia-nitrogen sewage, including the comprehensive utilization of carbide slag. technical background [0002] Excessive discharge of ammonia nitrogen into the water body will lead to eutrophication of the water body, and the oxidized nitrate and nitrite will also affect aquatic organisms and even human health. Therefore, wastewater denitrification treatment has received extensive attention from humans. Nitrification sludge dehydration liquid, garbage permeate, catalyst production plant sewage, meat processing sewage, synthetic ammonia sewage, coking sewage, oil refining sewage, chemical sewage, etc. contain extremely high concentrations of ammonia nitrogen. [0003] At present, the treatment methods of high-concentration ammonia-nitrogen sewage at home and abroad are divided into physical and chemical methods and biochemical methods. [0004] (1) Physical and chemical methods includ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F1/52C02F1/72C02F1/66C02F101/16
Inventor 杨忠刚
Owner 杨忠刚