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Method for cooperative remove of nitrate, ammonia nitrogen and COD in polluted water body

A technology of ammonia nitrogen and nitrate nitrogen is applied in the field of synergistic removal of nitrate nitrogen, ammonia nitrogen and COD in polluted water bodies, which can solve the problems of secondary pollution and low treatment efficiency, and achieve the effect of saving construction costs and floor space.

Active Publication Date: 2015-12-09
YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, hydrogen autotrophic denitrification is not suitable for water bodies heavily polluted by organic matter. Traditional denitrification treatment not only has low treatment efficiency, but also often contains a large number of microorganisms in the effluent, resulting in secondary pollution.

Method used

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  • Method for cooperative remove of nitrate, ammonia nitrogen and COD in polluted water body

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The upflow fixed bed reactor consists of water inlet, heterotrophic aerobic reaction zone, hydroautotrophic anaerobic reaction zone and water outlet from bottom to top; the water inlet is connected to the water inlet pump through pipelines, and the DC power supply is connected to the hydrogen autotrophic anaerobic reaction zone through wires. The oxygen reaction zone is connected.

[0022] The hydrogen autotrophic anaerobic reaction zone consists of three-dimensional electrodes and fillers between the electrodes; a DC power supply is connected with the three-dimensional electrodes through wires. The anode of the three-dimensional electrode is a carbon rod, and the cathode is a stainless steel mesh; the stainless steel mesh is arranged on the upper part of the heterotrophic aerobic reaction zone; the filler is ordinary carbon particles, and its size is determined according to the size of the reactor.

[0023] Removal method:

[0024] The waste water to be treated is a r...

Embodiment 2

[0033] The waste water to be treated comes from a river in Weifang, Shandong. Due to the direct discharge of sewage in rural areas in recent years, the supervision of industrial waste water is unfavorable, the excessive application of chemical fertilizers, and the pollution is heavy. The COD value in the water is 300mg / L, and the NO 3 - -N value 60mg / L;

[0034] The above-mentioned cement ascending fixed bed reactor with a diameter of 1.5 meters and a height of 2.5 meters is constructed near the downstream of the river to be treated. The anode of the three-dimensional electrode in the reactor is a carbon rod with a diameter of 25 cm and a length of 30 cm; the cathode is a stainless steel mesh , the stainless steel mesh is cut into a diameter of 1.2m and fixed on the upper part of the heterotrophic aerobic reaction zone; the filler is ordinary carbon particles with a particle size of 2-5cm.

[0035] Specific process:

[0036] 1) Take aerobic sludge (reflux sludge from aeratio...

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Abstract

The invention relates to the field of a water treatment in environment engineering, and provides a method for cooperative remove of nitrate, ammonia nitrogen and COD in polluted water body. An upwelling fixed bed reactor is used, a mode of combination of electrochemical hydrogenotrophic denitrfication and aerobic nitrification is used for treating the polluted water body, and nitrate, ammonia nitrogen and COD are removed at the same time. According to the invention, sewage / waste water with high pollution is treated with high efficiency and low energy consumption, and thereby nitrate, ammonia nitrogen and COD in the polluted water body can be cooperatively removed in the same reactor, thereby reducing construction cost generated by multiple flows and land occupation area, and ensuring fully utilization of each matrix in the reactor.

Description

technical field [0001] The invention relates to the field of water treatment in environmental engineering, and relates to a method for synergistic removal of nitrate nitrogen, ammonia nitrogen and COD in polluted water. Background technique [0002] With the rapid development of the economy, the excessive application of chemical fertilizers and the unreasonable discharge of industrial wastewater have caused drinking water sources (rivers, lakes and reservoirs, etc.) to be easily polluted by domestic sewage, rainwater, agricultural runoff, and industrial wastewater, causing surface pollution. Water and groundwater quality has seriously deteriorated. These water bodies usually contain higher concentrations of nitrogen substances, such as nitrate, ammonia nitrogen, etc., and also contain higher concentrations of COD. Usually, polluted water contains a large amount of organic matter, that is, accompanied by high concentrations of COD and ammonia nitrogen and other pollution ind...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F3/02C02F1/46C02F101/16
CPCY02W10/10
Inventor 盛彦清郑猛李兆冉杨剑
Owner YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI