Accelerator for enhanced biological removal of ammonia nitrogen in high ammonia nitrogen industrial wastewater and application thereof

A technology of industrial wastewater and accelerators, applied in the field of water treatment, can solve the problems of inconvenient operation and management, high cost, etc., and achieve the effect of good acid-base conditions, simple ingredients, and a wide range of wastewater

Inactive Publication Date: 2012-01-25
福建微水环保股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In engineering, the growth of nitrifying bacteria is often controlled by adjusting the aeration rate and the pH value of wastewater. Although the method of adding nitrifying bacteria to the nitrification tank can effectively promote the formation of dominant bacteria in the nitrification tank, but its High cost and inconvenient operation and management

Method used

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  • Accelerator for enhanced biological removal of ammonia nitrogen in high ammonia nitrogen industrial wastewater and application thereof
  • Accelerator for enhanced biological removal of ammonia nitrogen in high ammonia nitrogen industrial wastewater and application thereof
  • Accelerator for enhanced biological removal of ammonia nitrogen in high ammonia nitrogen industrial wastewater and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The accelerator of the present embodiment is prepared according to the required ratio, wherein formic acid is 100 parts by weight, glucose 20 parts by weight, salts 0.5 parts by weight, wherein iron citrate, CaCl 2 、Na 2 HPO 4 The molar ratio is 10:2:1, and the obtained effects are shown in Table 1.

[0029] The waste water tested in this example is leather waste water. After physical and chemical treatment, the waste water directly enters the biological treatment system. The water quality indicators entering the biological treatment system are as follows:

[0030] COD: 2200mg / l

[0031] NH 4 + -N: 190mg / l

[0032] pH value: 8.1

[0033] The sewage is treated by A / O (anaerobic aerobic process method), and the project water volume is 4000m 3 / d, the process conditions of nitrification tank operation are as follows:

[0034] Residence time: 33h

[0035] Temperature: 25-35°C

[0036] Control DO: 2-5mg / l

[0037] Return flow of nitrifying liquid: 2:1

[0038] Ac...

Embodiment 2

[0041] The accelerant of the present embodiment is prepared according to the required ratio, wherein 100 parts by weight of formic acid, 50 parts by weight of glucose, 1.5 parts by weight of salts, wherein ferric citrate, CaCl 2 、Na 2 HPO 4 The molar ratio is 10:1.5:0.5, and the obtained effects are shown in Table 1.

[0042] The test wastewater in this embodiment is leather wastewater. After physical and chemical treatment, the wastewater directly enters the biological treatment system. The water quality indicators entering the biological treatment system are as follows:

[0043] COD: 2200mg / l

[0044] NH 4 + -N: 190mg / l

[0045] pH value: 8.1

[0046] The sewage is treated by A / O (anaerobic aerobic process method), and the project water volume is 4000m 3 / d, the process conditions of nitrification tank operation are as follows:

[0047] Residence time: 33h

[0048] Temperature: 25-35°C

[0049] Control DO: 2-5mg / l

[0050] Return flow of nitrifying liquid: 2:1

...

Embodiment 3

[0054] The accelerator of the present embodiment is prepared according to the required ratio, wherein formic acid is 100 parts by weight, glucose 20 parts by weight, salts 0.5 parts by weight, wherein iron citrate, CaCl 2 , NaH 2 PO 4 The molar ratio is 10:2.5:1, and the obtained effects are shown in Table 2

[0055] The test wastewater in this example is coking wastewater. After physical and chemical pretreatment, the wastewater directly enters the biological treatment system. The water quality indicators entering the biological treatment system are as follows

[0056] COD: 2500mg / l

[0057] NH 4 + -N: 260mg / l

[0058] pH value: 8.1

[0059] The sewage is treated by A / O (anaerobic aerobic process method), and the project water volume is 1800m 3 / d, the process conditions of nitrification tank operation are as follows:

[0060] Residence time: 28h

[0061] Temperature: 25-35°C

[0062] Control DO: 2-5mg / l

[0063] Return flow of nitrifying liquid: 2:1

[0064] Accele...

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Abstract

The invention discloses an accelerator for enhanced biological removal of ammonia nitrogen in high ammonia nitrogen industrial wastewater and application thereof. The accelerator is a mixture comprising the raw materials in parts by weight: 100 parts of methanoic acid, 10-60 parts of glucose and 0.5-8 parts of salts. The accelerator provided by the invention can be directly added into wastewater and used for effectively accelerating the growth of nitrifying bacteria in a nitrifying tank to ensure that the nitrifying bacteria form dominant bacteria within short time, so that the problem that the nitrifying process is difficult to accelerate and control when the ammonia nitrogen wastewater is treated by using a biological method is solved.

Description

technical field [0001] The invention relates to an accelerator for strengthening biological removal of ammonia nitrogen in high ammonia nitrogen industrial wastewater and an application thereof, belonging to the field of water treatment. Background technique [0002] With the rapid development of industry in recent years, a large amount of industrial wastewater has become one of the important sources of pollution. Industrial wastewater not only has the disadvantages of high COD, high chroma, and poor biodegradability, but also many industrial wastewaters such as leather wastewater, coking wastewater, chemical wastewater and aquaculture wastewater have the characteristics of high ammonia nitrogen pollution. Disposal has always been one of the difficult problems in the environmental protection industry. [0003] Biochemical process is a widely used wastewater treatment process at present. Its purpose is to realize the conversion and removal of pollutants (COD, ammonia nitroge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F101/16
Inventor 徐军富孙耀跃
Owner 福建微水环保股份有限公司
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