Device and method of enhancing sludge stability and sludge digestion liquid treatment

A technology of sludge digestion liquid and sludge, which is applied in the field of processing objects, can solve the problems affecting the water quality of sewage treatment plants, etc., and achieve the effects of saving equipment costs and floor space, high degree of equipment integration, and easy promotion and application

Active Publication Date: 2013-05-08
SDIC XINKAI WATER ENVIRONMENT INVESTMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this part of the digested water accounts for only 2% of the treated water in the sewage treatment plant, the nitrogen and phosphorus loads reach 15-25% of the total load of the sewage treatmen...

Method used

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  • Device and method of enhancing sludge stability and sludge digestion liquid treatment
  • Device and method of enhancing sludge stability and sludge digestion liquid treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: The water inlet pump is in the open state, and the short-range nitrification effluent of the sludge digestion liquid continuously enters the hanging packing column through the water inlet pump and the water distribution pipe, contacts with the biosphere packing and spreads around. The flow rate of the water inlet pump is 0.5L / hour, and the hydraulic retention time HRT is 20 hours. Control the sludge residence time SRT of the reactor to 20 days, open the sludge discharge valve at the bottom every day to discharge 0.5L of mixed sludge, then turn on the sludge inlet pump, and pass the mixed sludge that has undergone anaerobic pretreatment into the integrated reactor. The mud volume is 0.5L. Put the above mixed sludge into the sludge pretreatment tank for anaerobic fermentation, the sludge residence time SRT is 2 days, and the second agitator rotates continuously.

Embodiment 2

[0031] Embodiment 2: The water inlet pump is in the open state, and the short-range nitrification effluent of the sludge digestion liquid continuously enters the hanging packing column through the water inlet pump and the water distribution pipe, contacts with the biosphere packing and spreads around. The flow rate of the water inlet pump is 0.4L / hour, and the hydraulic retention time HRT is 25 hours. Control the sludge residence time SRT of the integrated reactor to 25 days, open the sludge discharge valve at the bottom every day to discharge 0.4L of mixed sludge, then turn on the sludge inlet pump, and pass the mixed sludge that has undergone anaerobic pretreatment into the integrated reactor , The volume of mud entry is 0.4L. Put into above-mentioned mixed sludge in the sludge pretreatment tank and carry out anaerobic fermentation, the sludge residence time SRT is 2 days, and the second agitator rotates continuously.

[0032] The test proves that the mixed sludge of prim...

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Abstract

The invention relates to a device and method of enhancing sludge stability and sludge digestion liquid treatment, belonging to the field of treating sludge and sludge digestion liquid. The ammonia concentration (300-500mg/L) of the sludge digestion liquid is higher, and in a nitrifying process, the ammonia oxidizing bacteria are enriched due to the inhibition effect of free ammonia and free nitrous acid to nitrite oxidizing bacteria, so that short nitrification can be easily realized, the nitrite concentration of nitrified effluent water is 200-450mg/L. The nitrite firstly contacts with biological ball fillers inside a suspending filler column after entering a reactor, anaerobic ammonium oxidation bacterial conducts anaerobic ammonia oxidation reaction by utilizing ammonia nitrogen produced in a sludge digestion process, so that the ammonia nitrogen and the nitrite are converted into nitrogen and nitrate. The nitrogen overflows from the reactor, the denitrifying bacteria reduce the nitrite for an electronic donor by utilizing organic matters released during the sludge digestion, thereby finally achieving the purposes of eliminating ammonia nitrogen released during the sludge digestion and treating the short-nitrified effluent water of the sludge digestion liquid.

Description

technical field [0001] The invention discloses a device and method for strengthening the treatment of sludge stably collecting sludge digestion liquid. The mixed sludge of primary sludge and residual sludge produced by urban sewage plants is used as the processing object, and the short-range nitrification of sludge digestion liquid is used. Enhanced sludge treatment of effluent, realizes sludge fermentation, denitrification denitrification, denitrification phosphorus removal, anaerobic ammonium oxidation multiple functions coupling in the integrated reactor, to accelerate the release of organic matter, rapid and stable sludge synchronous treatment of sludge digestion liquid the goal of. The device and method are applicable to the field of treatment of sludge and sludge digested liquid which the invention belongs to. Background technique [0002] Sludge digestion is an important step in sludge treatment, which plays a role in degrading organic matter and promoting sludge sta...

Claims

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Application Information

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IPC IPC(8): C02F11/04
Inventor 彭永臻吴程程操沈彬张亮王淑莹张树军杜睿
Owner SDIC XINKAI WATER ENVIRONMENT INVESTMENT CO LTD
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