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Combined denitrification method and device for sludge thermal hydrolysis anaerobic digestion biogas slurry

A technology of anaerobic digestion and thermal hydrolysis, applied in chemical instruments and methods, water/sludge/sewage treatment, biological sludge treatment, etc., can solve problems such as inability to process biogas slurry, and achieve risk enhancement and total nitrogen removal. The effect of increasing the rate and stable operation of the system

Active Publication Date: 2019-02-19
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the domestic sewage treatment process provided by this patent can only treat domestic sewage with low concentration of ammonia nitrogen, and the concentration of ammonia nitrogen in sludge thermal hydrolysis anaerobic digestion biogas slurry is relatively high, and this process cannot treat sludge thermal hydrolysis anaerobic digestion Biogas slurry produced by technology

Method used

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  • Combined denitrification method and device for sludge thermal hydrolysis anaerobic digestion biogas slurry

Examples

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Embodiment 1

[0052] In this embodiment, the structure of the device used in the combined denitrification method of sludge thermal hydrolysis anaerobic digestion biogas slurry is as follows figure 1 As shown, it includes thermal hydrolysis biogas slurry storage tank 1, nitrosation reactor 2, intermediate water storage tank 3, anaerobic ammonium oxidation reactor connected in sequence,

[0053] The upper part of the thermal hydrolysis biogas slurry storage tank 1 is provided with a water inlet 1.2 of the thermal hydrolysis biogas slurry storage tank, and the water inlet 1.2 of the thermal hydrolysis biogas slurry storage tank is connected to the original biogas slurry delivery pump 1.1. Biogas slurry storage tank mixer 1.3 is fixed on the top of the storage tank with a bracket, pH online measuring instrument 1.4 is suspended and fixed at 1 / 2 of the height of the storage tank, and the bottom is equipped with an emptying pipe and mud discharge pipe 1.6, the height of the storage tank The outle...

Embodiment 2

[0069] The device used in the combined denitrification method of sludge thermal hydrolysis anaerobic digestion biogas slurry in this example is the same as that in Example 1.

[0070] The experimental water used in this example is taken from the plate and frame press filtrate after thermal hydrolysis and anaerobic digestion of sludge from a sludge plant in Changsha City, Hunan Province. The water quality is as follows: NH 4 + -N: 1500; COD: 2000; SS: 100mg / L; Alkalinity: 2000mg / L; pH 7.5.

[0071] The combined denitrification method of anaerobic digestion biogas slurry by thermal hydrolysis of sludge specifically includes the following steps:

[0072] (1) Pretreatment of sludge thermal hydrolysis anaerobic digestion biogas slurry

[0073] The thermal hydrolysis biogas slurry storage tank 1 in the device pretreats the raw biogas slurry, using NaHCO 3 and HCl to adjust the pH of the raw biogas slurry to 7.5, using NaHCO 3 Adjust biogas slurry alkalinity to 4500mgCaCO 3 / L, ...

Embodiment 3

[0081] The device used in the combined denitrification method of sludge thermal hydrolysis and anaerobic digestion biogas slurry in this example is the same as that in Example 1.

[0082] The experimental water used in this example is taken from the plate and frame press filtrate after thermal hydrolysis and anaerobic digestion of sludge from a sludge plant in Changsha City, Hunan Province. The water quality is as follows: NH 4 + -N: 1600; COD: 2200; SS: 200mg / L; alkalinity: 3000mg / L; pH value 8.0.

[0083] The combined denitrification method of anaerobic digestion biogas slurry by thermal hydrolysis of sludge specifically includes the following steps:

[0084] (1) Pretreatment of sludge thermal hydrolysis anaerobic digestion biogas slurry

[0085] The thermal hydrolysis biogas slurry storage tank 1 in the device pretreats the raw biogas slurry, using NaHCO 3 and HCl to adjust the pH of the raw biogas slurry to 8, using NaHCO 3 Adjust biogas slurry alkalinity to 5500mgCaCO...

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Abstract

The invention relates to a combined denitrification method and device for sludge thermal hydrolysis anaerobic digestion biogas slurry. The device comprises a regulation and storage tank, a nitrosationreactor, an intermediate water storage tank and an anaerobic ammonia oxidation reactor; the pH and alkalinity value of the sludge thermal hydrolysis anaerobic digestion biogas slurry entering the regulation and storage tank are adjusted, then the thermal hydrolysis biogas slurry enters the nitrosation reactor to achieve partial nitrosation, ammonia nitrogen in the biogas slurry is oxidized into nitrate nitrogen in a certain proportion, and at the same time, easily degradable organic substances are removed; then, the biogas slurry enters the intermediate water storage tank, and the ratio of nitrate nitrogen to ammonia nitrogen, pH and alkalinity of the biogas slurry are adjusted; finally, adjusted effluent enters the anaerobic ammonium oxidation reactor to remove nitrogen in the biogas slurry. Compared with the prior art, the method and the device have the advantages that the ammonia nitrogen removal rate is high and most of the easily degradable organic substances are removed.

Description

technical field [0001] The invention relates to a method for efficiently treating sludge thermal hydrolysis anaerobic digestion biogas slurry, in particular to a combined denitrification method and device for sludge thermal hydrolysis anaerobic digestion biogas slurry. Background technique [0002] With the continuous improvement of human living standards, the construction of sewage treatment facilities has developed rapidly. At the same time, as a by-product of sewage biological treatment, the output of sludge has increased sharply. Thermal hydrolysis anaerobic digestion technology can improve the hydrolysis effect and organic matter degradation rate of sludge, increase biogas production; kill bacteria in sludge; shorten the residence time of anaerobic digestion and increase the sludge concentration in the digester. At the same time, the digested sludge is easy to dehydrate and the volume of the sludge is reduced, so it is applied in more and more practical projects. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F11/04C02F101/16
CPCC02F3/302C02F11/04C02F2101/16C02F2209/06
Inventor 戴晓虎戴翎翎徐友王国鹏刘文静顾国维薛勇刚
Owner TONGJI UNIV
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