Mineralized refuse packed bed and wastewater denitrification method

A technology for mineralizing garbage and packed beds, applied in chemical instruments and methods, water pollutants, biological water/sewage treatment, etc., can solve problems affecting the efficiency and stability of anammox reactors, growth inhibition, alkalinity pH problems such as decline, to achieve the effect of being conducive to recycling, simple process and low energy consumption

Active Publication Date: 2015-03-25
湖南亿纳环保科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still the following defects: since the concentration of ammonia nitrogen in the wastewater is as high as 2000 mg / L, in order to remove all the ammonia nitrogen in the anammox stage through the anaerobic ammonium oxidation reaction, at least 1000 mg / L of ammonia nitrogen needs to be oxidized into NO X -, which will cause higher nitrite accumulation, and consume a large amount of alkalinity to cause a drop in pH. The combined action of the two will cause serious substrate inhibition to the anammox reaction; A large amount of alkalinity is generated, which makes the pH at the bottom of the anammox reactor high, which also affects the efficiency and stability of the anammox reactor; BOD in wastewater 5 The high concentration makes the heterotrophic microorganisms compete with the autotrophic microorganisms in the pretreatment mineralized waste bed. Since nitrifying bacteria and anammox bacteria are all autotrophic bacteria, their growth is inhibited; at the same time, the reproduction of a large number of heterotrophic microorganisms It makes the stuffing clogged and needs to be dredged irregularly, which reduces the operating efficiency and treatment effect; in addition, because no insulation and heating measures are used, it must be operated in a high temperature environment, which limits the application of this technology

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  • Mineralized refuse packed bed and wastewater denitrification method

Examples

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Embodiment 1

[0033] Influent water properties: coking wastewater, ammonia nitrogen content 1433-2134 mg / L, COD 1577-2544 mg / L, BOD 5 574-763 mg / L, pH 10.5-11.3.

[0034] Pretreatment: use activated sludge method to remove BOD 5 Reduce the pH to 25-51 mg / L, adjust the pH of the wastewater to 7.8-8.9, and use a partition heater at 20-40°C to obtain wastewater 101.

[0035] Mineralized waste packing bed: Mineralized waste packing 2 is the urban domestic waste that has been buried for 8 years. After being screened at 30mm, large particles of glass, battery residues, metals, and stones are removed to obtain brown loose soil-like materials. The bed wall 3 of the mineralized garbage packing bed is 3.5m high, and there are 4 aerobic zones and 3 anaerobic zones inside, and the anaerobic zone and the aerobic zone are arranged alternately. The aerobic zone at the bottom of the packed bed is realized by natural ventilation, and the formation of the other three aerobic zones is realized by arranging ...

Embodiment 2

[0041] Influent water quality: the leachate of middle-aged and elderly waste landfills with a landfill age of 8 years, COD is 1834~2433mg / L, ammonia nitrogen is 2430~3071mg / L, BOD 5 It is 244~336mg / L, and the pH value is 7.4~8.5.

[0042] Pretreatment: by Fenton oxidation, BOD 5 Reduce it to 87~200 mg / L, add soda ash to make the pH of the wastewater 8.0-8.8, and adjust the temperature to 30±2°C by directly filling it with high-temperature steam to obtain wastewater 101.

[0043] Mineralized waste packing bed: Mineralized waste packing 2 is a brown loose soil-like material obtained after 10-year-old municipal solid waste is sieved through a 10mm sieve to remove large particles of glass, battery residues, metals, and stones. The bed wall 3 of the mineralized garbage packing bed is 2m high, and there are 2 aerobic zones and 1 anaerobic zone inside, and the anaerobic zone and the aerobic zone are arranged alternately. The aerobic zone at the bottom of the packed bed is realized ...

Embodiment 3

[0047] Influent water properties: Pig farming wastewater, ammonia nitrogen content 209-1100 mg / L, COD 847-1544 mg / L, BOD 5 363-758 mg / L, pH 7.1-7.6.

[0048] Pretreatment: Activated sludge method, effluent BOD 5 45-96 mg / L, pH 6.9-7.3, ammonia nitrogen content 247-683 mg / L.

[0049] Mineralized Garbage Bed: Mineralized Garbage Filler 2 is a brown loose soil-like material obtained after 10-year-old municipal solid waste has been sieved through a 10mm sieve to remove large particles of glass, battery residues, metals, and stones. The bed wall 3 of the mineralized garbage packing bed is 2m high, and there are 2 aerobic zones and 1 anaerobic zone inside, and the anaerobic zone and the aerobic zone are arranged alternately. The aerobic zone at the bottom of the packed bed is realized by natural ventilation, and the formation of the aerobic zone at the top is realized by arranging a single-layer pipe diameter of 25mm porous ventilation pipes. The ventilation main pipe 4 is connect...

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Abstract

In order to realize low-cost denitrification of nitrogen-containing wastewater and reasonably utilize the mineralized refuse, the invention provides a mineralized refuse packed bed and a method of removing the nitrogen in the nitrogen-containing wastewater based on the mineralized refuse packed bed. The blockage problem of the packed bed is solved by lowering BOD5 in inlet water, cooperation of partial nitrification and the anaerobic ammonia oxidation is realized by an additionally-arranged vent pipe, and the treatment efficiency is guaranteed by use of a thermal insulation layer, so that the mineralized refuse packed bed is a mineralized refuse packed bed which has low energy consumption, low cost and low carbon footprint. Besides, the wastewater denitrification method is a nitrogen-containing wastewater denitrification treatment method.

Description

technical field [0001] The invention relates to a mineralized garbage packing bed and a method for removing nitrogen from nitrogen-containing waste water based on the mineralized garbage packing bed. Background technique [0002] Nitrogen-containing pollutants include nitrogen-containing organic matter, nitrate, nitrite, and ammonia nitrogen. Controlling the discharge of nitrogen-containing pollutants to natural water bodies is an important means of controlling water eutrophication. The Chinese government has imposed strict restrictions on the discharge of ammonia nitrogen. There are more than 40 pollutant discharge standards involving ammonia nitrogen limits, and more than 20 industry standards. In addition, some standards involve the control of nitrate nitrogen and nitrite nitrogen. With the continuous improvement of environmental requirements, there will be more standards involving nitrate nitrogen and nitrite nitrogen. The eutrophication of China's water bodies is serio...

Claims

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Application Information

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IPC IPC(8): C02F3/30
CPCC02F3/302C02F2101/16C02F2103/06
Inventor 肖灿周特佳赵由才曹尉南
Owner 湖南亿纳环保科技有限公司
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