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Method for realizing short distance deep denitrogenation under low temperature

A technology of deep denitrification and low temperature conditions, applied in the directions of aerobic and anaerobic process treatment, can solve the problems of short-range biological denitrification and other disadvantages, and achieve the effect of saving energy consumption for aeration, solving incomplete reaction and high automation level.

Active Publication Date: 2008-09-17
JIANGSU YULONG ENVIRONMENTAL PROTECTION
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Problems solved by technology

However, the lower temperature is extremely unfavorable to the realization of short-term biological nitrogen removal.

Method used

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  • Method for realizing short distance deep denitrogenation under low temperature
  • Method for realizing short distance deep denitrogenation under low temperature
  • Method for realizing short distance deep denitrogenation under low temperature

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Experimental program
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Effect test

Embodiment

[0062] 1) In the short-range deep denitrification start-up stage, run 90 cycles according to the following procedures:

[0063] The actual domestic sewage discharged from a family area of ​​a certain university was used as the experimental object (pH=6.5-7.8, COD=260-350mg / L, TN=75-80mg / L). The selected SBR reactor has an effective volume of 15L, and the water treatment volume per cycle is 12L. The COD concentration of the mixed liquid in the reactor is maintained at 200-300mg / L, and the NH 4 + -N concentration is 55-60mg / L, in the start-up stage of short-range deep denitrification, the reaction temperature is controlled by a temperature control device to 25°C, and the concentration of 95% ethanol is used as an external carbon source. The specific operation process of each cycle is as follows:

[0064] 1 The SBR reactor with an effective volume of 15L is used for water inlet. First, open the water inlet valve, start the water inlet pump to inject the waste water to be treate...

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Abstract

The invention relates to a method for realizing nitrogenous wastewater biological treatment process, particularly to a method for realizing short distance deep denitrogenation. The inventive method includes a short distance deep denitrogenation starting-up stage, a stabilizing stage and a cooling stage; and comprises the steps of feeding water, aerating, denitrifying, settling, draining, sludge discharging, and idle running. In the short distance deep denitrogenation starting-up stage, the system temperature is 25 DEG C, the mean sludge retention time is 15 days, and the number of operating periods is 90-95; in the stabilizing stage, the system temperature is 25 DEG C, the sludge retention time is 15 days, and the number of operating periods is 60-65; and in the cooling stage, the system temperature is adjusted to 18 DEG C, the sludge retention time is 15 days, and after 30-35 operating periods, the temperature is adjusted to 11 DEG C, and the sludge retention time is 20 days. The inventive method has the advantages of good denitrogenation effect, high degree of automation, low energy consumption, and capability of stable operation under low temperature conditions.

Description

technical field [0001] The invention relates to a method for realizing a nitrogen-containing wastewater biological treatment process, especially a method capable of realizing a short-range deep denitrification process under low temperature conditions, which is suitable for nitrogen-containing industrial wastewater treatment and urban sewage advanced treatment in cold regions. Background technique [0002] With the rapid development of industry and agriculture, my country has accelerated the pace of water environment treatment, and the sewage treatment rate has been greatly improved. However, the eutrophication problem of slow-flowing water has not been solved, and it is becoming more and more serious. The limiting nutrients in the water body--nitrogen and phosphorus, are the main reasons for the eutrophication of the water body. Biological nitrification and denitrification is currently the most commonly used sewage denitrification method. Traditional nitrification is carrie...

Claims

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Application Information

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IPC IPC(8): C02F3/30
Inventor 彭永臻杨庆李凌云甘一萍常江
Owner JIANGSU YULONG ENVIRONMENTAL PROTECTION
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