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Method for rapidly starting denitrification-nitrification biochemical treatment system

A biochemical treatment and quick start-up technology, applied in the field of biochemical treatment, can solve the problems of low proportion of nitrifying bacteria, easy loss of nitrifying bacteria, slow system start-up, etc., and achieve the goal of increasing the effluent compliance rate, curbing the poor return of sludge and speeding up the start-up Effect

Active Publication Date: 2015-03-25
CHINA PETROLEUM & CHEM CORP +1
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  • Description
  • Claims
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Problems solved by technology

[0011] In view of the defects existing in the start-up technology of the existing denitrification-nitrification biochemical treatment process when the target influent water of the biochemical unit contains both high-concentration organic matter and high-concentration ammonia nitrogen, the purpose of the present invention is to provide a rapid start-up denitrification- The method of nitrification biochemical treatment system, in order to overcome the problem of low proportion of nitrifying bacteria in the start-up process of the conventional start-up method of the existing denitrification-nitrification biochemical treatment system, easy loss of nitrifying bacteria, slow and unstable system startup

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Embodiment 1

[0096] The technical scheme of the present invention is used to treat about 20t / h of wastewater discharged from a cyclohexanone production device, about 80t / h of wastewater discharged from a coal gasification device, and about 200t / h of urban sewage, and the COD of wastewater discharged from a cyclohexanone production device is about 1500mg / L. COD of wastewater discharged from the coal gasification unit is about 1000mg / L, ammonia nitrogen is about 700mg / L, urban sewage COD is about 300mg / L, ammonia nitrogen is about 30mg / L; the total volume of facultative tank and aeration tank is 8000m 3 ; 3 strands of wastewater are mixed into the anoxic unit in the homogeneous tank, the COD of wastewater is 400-700mg / L, NH 3 -N is 100~250mg / L, B / C is 0.5~0.7; effluent requires COD≤60mg / L, NH 3 -N≤15mg / L; the seed sludge is the residual sludge of the municipal sewage treatment plant; the time to increase the flow rate of wastewater entering the structure of the homogeneous pool or to increas...

Embodiment 2

[0105] The technical scheme of the present invention is used to treat about 10L / d of wastewater discharged from a cyclohexanone production device, about 40L / d of wastewater discharged from a coal gasification device, about 5L / d of wastewater discharged from a rubber antioxidant RD production device, and about 100L / d of circulating cooling water wastewater. d. The COD of the wastewater discharged from the cyclohexanone production unit is about 1500mg / L, the COD of the wastewater discharged from the coal gasification unit is about 1000mg / L, the ammonia nitrogen is about 500-700mg / L, and the COD of the wastewater discharged from the rubber antioxidant RD production unit is about 9000~ 15000mg / L, the COD of circulating cooling water sewage is about 80mg / ; the total effective volume of the anoxic unit and the aerobic unit is 250L; the 4 strands of wastewater are mixed into the anoxic unit in the homogeneous tank, and the COD of the wastewater is 550-1000mg / L, NH 3 -N is 100~200mg / L,...

Embodiment 3

[0114] The technical scheme of the present invention is used to treat about 10L / d of wastewater discharged from coal gasification devices and about 100L / d of urban sewage, COD of wastewater discharged from coal gasification devices is about 1000mg / L, ammonia nitrogen is about 700mg / L, and urban sewage COD is about 300mg / L L, ammonia nitrogen is about 30mg / L; the total volume of the facultative tank and the aeration tank is 60L; the two streams of wastewater are mixed into the anoxic unit in the homogeneous tank, and the COD of the wastewater is 300-400mg / L, NH 3 -N is 60~120mg / L, B / C is 0.6~0.9; effluent requires COD≤60mg / L, NH 3 -N≤15mg / L; the seed sludge is the sludge from the digestion tank of the municipal sewage treatment plant; the time to increase the flow of wastewater entering the structure of the homogeneous pool or increase the type of wastewater entering the structure of the homogeneous pool is when the concentration of COD in the effluent of the sedimentation unit ...

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Abstract

The invention relates to a method for rapidly starting a denitrification-nitrification biochemical treatment system, the denitrification-nitrification biochemical treatment system comprises the following components: a homogenizing unit, an anoxic unit, an aerobic unit and a deposition unit; the anoxic unit and the aerobic unit are collectively referred to as a biochemistry unit. The method is characterized in that an oxidizability substance required by denitrification is added in the homogenizing unit or the anoxic unit for domestication of denitrifying bacteria in advance, an iron compound is added at the homogenizing unit or the anoxic unit or the aerobic unit or an outlet of the aerobic unit for improving the sludge settlement performance of the deposition unit, and inhibition of iron ion in the iron compound (except iron hydroxide) on the denitrification and nitrification reactions can be eliminated by adding alkalescence substance. The method guarantees rapid starting of the denitrification-nitrification biochemical treatment system, when the denitrification-nitrification biochemical treatment system is started by using same seed sludge and a water inlet program. The method provided by the invention can complete starting by at least three weeks in advance, and the effluent standard-reaching rate at a starting period is increased.

Description

technical field [0001] The present invention relates to biochemical treatment of waste water or sewage, specifically a method for quickly starting a denitrification-nitrification biochemical treatment system, and the denitrification-nitrification biochemical treatment system is used to treat waste water containing both high-concentration organic matter and high-concentration ammonia nitrogen . Background technique [0002] The wastewater discharged from some industrial production devices, the mixed wastewater discharged from various production devices, or the mixed wastewater of the above wastewater and urban sewage may form wastewater containing both high concentrations of organic matter and ammonia nitrogen (that is, containing high concentrations of Wastewater with organic matter and high concentration of ammonia nitrogen, referred to as wastewater containing organic matter and ammonia nitrogen), national and local standards for COD of drainage (high concentration of orga...

Claims

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Application Information

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IPC IPC(8): C02F3/30
Inventor 高凤霞程学文王珺张宾莫馗侯秀华李海龙
Owner CHINA PETROLEUM & CHEM CORP
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