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Iron ion reinforced anaerobic ammonia oxidation denitrification process

A technology of anaerobic ammonium oxidation and iron ions, which is applied in aerobic and anaerobic process treatment, anaerobic digestion treatment, chemical instruments and methods, etc., can solve the problems of anaerobic ammonium oxidation denitrification efficiency, poor process stability, Slow enrichment culture and other problems, to achieve the effect of accelerating enrichment culture, improving process stability, and promoting microbial growth

Inactive Publication Date: 2018-10-09
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem solved by the present invention is: in view of the slow enrichment and cultivation of anammox denitrification in the prior art, poor process stability, and the problem that the efficiency of anammox denitrification needs to be improved, an iron ion-enhanced anammox denitrification is provided. Oxygen denitrification process

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  • Iron ion reinforced anaerobic ammonia oxidation denitrification process
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  • Iron ion reinforced anaerobic ammonia oxidation denitrification process

Examples

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Effect test

Embodiment 1

[0040] An iron ion enhanced anammox denitrification process, the specific steps of the anammox denitrification process are as follows:

[0041] Step 1: first add 1.25mL / L trace element concentrate in the waste water to be treated, then select the acid solution of mass concentration 30% to adjust the waste water to be treated so that the pH is 6.7, the acid solution under this concentration can slightly adjust the pH, Avoid inaccurate pH adjustments. Finally, aerate with high-purity nitrogen with a concentration greater than 99.5% until the dissolved oxygen is lower than 0.5 mg / L to obtain treated wastewater, and the aeration time is 2 hours;

[0042] Step 2: Sludge selects denitrification sludge for use, uses the K of pH=7.2 2 HPO 4 / KH 2 PO 4 The buffer solution washes the denitrification sludge multiple times to wash away the ammonia nitrogen, organic matter, nitrite and nitrate in the denitrification sludge, and adds the sludge into the anammox reactor;

[0043] Step 3...

Embodiment 2

[0051]An iron ion enhanced anammox denitrification process, the specific steps of the anammox denitrification process are as follows:

[0052] Step 1: first add 1.25mL / L trace element concentrated solution in the waste water to be treated, then select the acid solution of mass concentration 35% to adjust the waste water to be treated so that the pH is 6.7, the acid solution under this concentration can slightly adjust the pH, Avoid inaccurate pH adjustments. Finally, aerate the treated wastewater with high-purity nitrogen with a concentration greater than 99.5% until the dissolved oxygen is lower than 0.5 mg / L, and the aeration time is 2.5 hours;

[0053] Step 2: Sludge selects denitrification sludge for use, uses the K of pH=7.2 2 HPO 4 / KH 2 PO 4 The buffer solution washes the denitrification sludge multiple times to wash away the ammonia nitrogen, organic matter, nitrite and nitrate in the denitrification sludge, and adds the sludge into the anammox reactor;

[0054] S...

Embodiment 3

[0062] An iron ion enhanced anammox denitrification process, the specific steps of the anammox denitrification process are as follows:

[0063] Step 1: first add 1.25mL / L trace element concentrate in the waste water to be treated, then select the acid solution of mass concentration 38% to adjust the waste water to be treated so that the pH is 6.8, the acid solution under this concentration can slightly adjust the pH, Avoid inaccurate pH adjustments. Finally, aerate with high-purity nitrogen with a concentration greater than 99.5% until the dissolved oxygen is lower than 0.5mg / L to obtain treated wastewater, and the aeration time is 3 hours;

[0064] Step 2: Sludge selects denitrification sludge for use, uses the K of pH=7.2 2 HPO 4 / KH 2 PO 4 The buffer solution washes the denitrification sludge multiple times to wash away the ammonia nitrogen, organic matter, nitrite and nitrate in the denitrification sludge, and adds the sludge into the anammox reactor;

[0065] Step 3:...

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Abstract

The invention provides an iron ion reinforced anaerobic ammonia oxidation denitrification process, which comprises the following steps of firstly adding a trace element concentration solution into waste water to be treated; then regulating the pH of the waste water to be treated; finally performing aeration to obtain treated waste water; meanwhile, adding treated sludge into an anaerobic ammonia oxidation reactor; next, introducing the treated waste water into the anaerobic ammonia oxidation reactor; meanwhile, using an adder for adding iron ions in a water inlet position of the anaerobic ammonia oxidation reactor; controlling the reaction temperature of the anaerobic ammonia oxidation reactor and the sludge concentration in the anaerobic ammonia oxidation reactor in the denitrification process, wherein the sludge retention time of the anaerobic ammonia oxidation reactor is 20 to 60d; pumping oxygen gas into the anaerobic ammonia oxidation reactor. Generally, the process design is reasonable; the anaerobic ammonia oxidation denitrification efficiency can be improved; the anaerobic ammonia oxidation denitrification enrichment culture speed is accelerated; the process stability is improved.

Description

technical field [0001] The invention relates to the technical field of sewage treatment and regeneration, in particular to an iron ion enhanced anaerobic ammonium oxidation denitrification process. Background technique [0002] The traditional biological denitrification process focuses on nitrification and denitrification. Nitrification, that is, under aerobic conditions, ammonia oxidizing bacteria (AOB) oxidize ammonia nitrogen to nitrite, and then nitrite oxidizing bacteria (NOB) oxidize nitrite to nitric acid Salt; denitrification (denitrification), that is, denitrifying bacteria (denitrifying bacteria) reduce nitrate or nitrite to nitrogen gas under anaerobic conditions. Based on the principle of nitrification and denitrification, traditional biological denitrification processes mainly include: sequencing batch activated sludge process (SBR), anoxic / aerobic (A / O) process, anaerobic / anoxic / aerobic (A / A / O) process, oxidation ditch process, UCT process, Bardenpho process...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F3/30C02F3/28C02F101/16C02F101/30
CPCC02F3/28C02F3/30C02F3/34C02F2101/16C02F2101/30
Inventor 许柯任洪强耿金菊张徐祥黄辉
Owner NANJING UNIV
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