Anaerobic treatment method

Abstract

In an anaerobic treatment method in which contaminated water is introduced into an acidification tank to decompose polymer components in the contaminated water into organic acids, and the effluent from the acidification tank is introduced into a methane production tank containing non-biological fluidized carriers so as to convert the acids into methane, the treatment is carried out stably and continuously by preventing the occurrence of floating of carriers in the methane production tank. The CODcr concentration of polymer components other than organic acids in the acidification tank effluent to be introduced into the methane production tank is controlled to be not more than 300 mg / L. This control prevents the occurrence of acid production reactions in the methane production tank and the consequent proliferation of microorganisms, and thereby suppresses sticking of carriers as well as the occurrence of floating and blockage by the carriers.

Description

technical field

[0001] The invention relates to a method of introducing treated water into an acid generating tank and decomposing the polymer components in the treated water into organic acids, and then introducing the effluent water from the acid generating tank into a methane generating tank filled with a fluid non-biological carrier for methane Anaerobic treatment method of fermentation treatment. Background technique

[0002] As an anaerobic treatment method for organic waste water, large granular sludge with sedimentation properties is formed at a high density in the reaction tank, and the organic waste water containing soluble BOD is passed in an upward flow to form The UASB (Upflow Anaerobic Sludge Blanket: Upflow Anaerobic Sludge Blanket) method in which the state of the sludge bed (Sluge blanket) is contacted and treated at a high load and high speed. In this method, the solid organic matter with a slow digestion rate is separated and treated separately, and only ...

Examples

Embodiment 1～3、 comparative example 1

[0104] according to figure 1 The anaerobic treatment device shown, the synthetic drainage (COD) with sugar and protein as the main body Cr Concentration: 500~1500mg / L, all COD Cr COD derived from polymer components other than organic acids Cr Ratio: about 60%, pH 7.0) was used as raw water for water flow test.

[0105] In this anaerobic treatment device, after treating the raw water with the acid generating tank 1, the pump P 1 Supply to pH adjustment tank 2 and adjust pH with pump P 2 The pH-adjusted water is passed through the methanogenesis tank 3 filled with the fluid non-biological carrier 4 so as to flow upward, and the treatment is performed. A part of the effluent water from the methane generation tank 3 is circulated to the pH adjustment tank 2 as circulating water, and the rest is discharged out of the system as treated water. The water in the acid generation tank 1 uses the pump P 0 to loop. In the acid generation tank 1 and the pH adjustment tank 2, sodium h...

technical field

[0001] The invention relates to a method of introducing treated water into an acid generating tank and decomposing the polymer components in the treated water into organic acids, and then introducing the effluent water from the acid generating tank into a methane generating tank filled with a fluid non-biological carrier for methane Anaerobic treatment method of fermentation treatment. Background technique

[0002] As an anaerobic treatment method for organic waste water, large granular sludge with sedimentation properties is formed at a high density in the reaction tank, and the organic waste water containing soluble BOD is passed in an upward flow to form The UASB (Upflow Anaerobic Sludge Blanket: Upflow Anaerobic Sludge Blanket) method in which the state of the sludge bed (Sluge blanket) is contacted and treated at a high load and high speed. In this method, the solid organic matter with a slow digestion rate is separated and treated separately, and only ...

Examples

Embodiment 1～3、 comparative example 1

[0104] according to figure 1 The anaerobic treatment device shown, the synthetic drainage (COD) with sugar and protein as the main body Cr Concentration: 500~1500mg / L, all COD Cr COD derived from polymer components other than organic acids Cr Ratio: about 60%, pH 7.0) was used as raw water for water flow test.

[0105] In this anaerobic treatment device, after treating the raw water with the acid generating tank 1, the pump P 1 Supply to pH adjustment tank 2 and adjust pH with pump P 2 The pH-adjusted water is passed through the methanogenesis tank 3 filled with the fluid non-biological carrier 4 so as to flow upward, and the treatment is performed. A part of the effluent water from the methane generation tank 3 is circulated to the pH adjustment tank 2 as circulating water, and the rest is discharged out of the system as treated water. The water in the acid generation tank 1 uses the pump P 0 to loop. In the acid generation tank 1 and the pH adjustment tank 2, sodium h...

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