CN104445612B - A kind of method of quick startup denitrification-nitrification biochemical treatment system - Google Patents
A kind of method of quick startup denitrification-nitrification biochemical treatment system Download PDFInfo
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Abstract
A kind of method that the present invention relates to quick startup denitrification nitrification biochemical treatment system, described denitrification nitrification biochemical treatment system includes: homogeneous unit, anoxic unit, aerobic unit and precipitation unit, anoxic unit and aerobic unit are referred to as biochemical unit, it is characterized in that: by oxidizing substance needed for increase denitrification in homogeneous unit or anoxic unit, tame denitrifying bacteria in advance, sludge settling property in precipitation unit is improved by adding iron compound to the outlet of homogeneous unit or anoxic unit or aerobic unit or aerobic unit, by iron ion in the interpolation added iron compound (beyond dehydrogenation ferrum oxide) of alkaline matter elimination to denitrification and the suppression of nitration reaction.The method of the invention, ensure the quick startup of denitrification nitrification biochemical treatment system, when using same kind mud and water inlet program starts denitrification nitrification biochemical treatment system, the time using the method that provides of the present invention can shift to an earlier date at least three weeks completes to start, and standard water discharge rate raising during starting.
Description
Technical field
The present invention relates to the biochemical treatment of waste water or sewage, a kind of quickly anti-nitre of startup
The method of change-nitrification biochemical treatment system, described denitrification-nitrification biochemical treatment system is used for locating
Reason contains the waste water of high-enriched organics and ammonia nitrogen in high density simultaneously.
Background technology
The waste water that some industrial installation is discharged, multiple process units are discharged the mixing of waste water and are given up
The composite waste of water or above waste water and municipal sewage, be all likely to be formed contain simultaneously more highly concentrated
The waste water of degree Organic substance and behavior of high-strength ammonium (contains high-enriched organics and high concentration the most simultaneously
The waste water of ammonia nitrogen, referred to as containing Organic substance and the waste water of ammonia nitrogen), country and provincial standard are to row
The COD(high-enriched organics of water can show as high concentration COD when measuring, but COD
Not always represent Organic substance), ammonia nitrogen all require, and index is increasingly stricter, to this
The class process containing Organic substance and the waste water of ammonia nitrogen requires to be substantially to remove Organic substance, also wants
Removal of ammonia and nitrogen.
When major part, the waste water containing Organic substance and ammonia nitrogen is used denitrification-nitrification biochemical treatment
The cost of PROCESS FOR TREATMENT or relatively low.Denitrification is preposition can utilize nitration section to produce
Organic substance in the high-valence state nitrogen oxidized waste waters such as nitrate anion, the Organic substance that can reduce aerobic unit is born
Lotus, increases the nitrobacteria content of aerobic unit.
Conventional denitrification-nitrification biochemical treatment system specifically includes that homogeneous unit, anoxic unit
(oxygen unit of also referred to as holding concurrently, be substantially carried out denitrification biochemical reaction), aerobic unit are (also referred to as
Aeration unit, is substantially carried out nitration reaction) and precipitation unit, wherein anoxic unit and aerobic list
Unit can also be referred to as biochemical unit.Conventional denitrification-nitrification biochemical treatment system flow process signal
Figure is shown in Fig. 1.In Fig. 1, homogenizing refers to that homogeneous unit, anoxia refer to that anoxic unit, aerobic finger are aerobic
Unit, precipitation refer to precipitation unit.The main units of unit is as follows: homogeneous unit is usual
For homogenizing pond, anoxic unit is usually oxygen compatibility pool, and aerobic unit is usually Aeration tank, and precipitation is single
Unit's usually sedimentation tank, except the form in pond, each structures can also use the shapes such as tank, post, well
Formula.
But there is startup and even start unsuccessfully slowly in routine denitrification-nitrification biochemical treatment system
Problem.Generally believe that nitrobacteria is chemoautotrophic bacteria, generation time length, reproduction speed slow,
Be prone to run off, easily cause that nitrobacteria ratio in system biological amount is too small, difficulty in starting,
Fluctuation of service.
200910219411.9 propose to use high-concentration ammonia nitrogenous wastewater to enter rear-mounted denitrification device people
Work cultivates nitrobacteria, is added in urban sewage treatment system, nitrobacteria in raising system
Ratio；200710010384.5(CN101239751) propose to use intermittent activated sludge process
Gradually step up culture fluid ammonia nitrogen concentration enrichment culture nitrobacteria mud and then process high strength ammonia
Nitrogen sewage.These scheme essence are constantly to add nitre to denitrification-nitrification biochemical treatment system
Change bacterium, be not to solve the essential measure that in start-up course, in system, nitrobacteria runs off, do not promote
Denitrification-nitrification biochemical treatment system self is made to start and stable operation；And both needs
Use single device for cultivating nitrifier outside wastewater treatment equipment, add device number
Amount and operating cost.
200910098630.6(C101549903B) propose continuum micromeehanics interval water outlet add
Blood urea nitrogen, to design load 2～the Starting mode of 3 times, does not propose fundamentally to accelerate to open
Dynamic method, the startup cycle do not reduces, seems the ratio adding nitrobacteria in startup,
But the nitrification ability of device can decline because of actual motion the most again, and continuum micromeehanics interval goes out
Water especially leans in the non-batch method of operation and can not realize on the device of flow by gravity overflow.
Aerobic nitrifying granular activated sludge seems to solve nitrifier losing issue.And " temperature is to good
The impact of oxygen granule sludge nitrogen removal performance and granule stability (China Environmental Science 2009,
29 (7): 697-70) research " and 210810228327.9(CN101386448B) shows,
At present aerobic nitrifying granular activated sludge technology is applicable to the occasion that ammonia nitrogen loading is higher, and temperature wave
Dynamic, operation time lengthening all can cause the fluctuation of service that granule sludge disintegration ultimately causes system
And ultimately result in and start unsuccessfully, more crucially the cultivation of aerobic nitrifying granular activated sludge is more difficult to work
Industryization realizes.
201010136902.X(CN101774693B) use the most preliminary biofilm then emphasis to cultivate
Domestication nitrifier is further cultured for taming the mode of denitrifying bacterium, can be by front through 120 days～140 days
The water outlet debugging putting denitrification biological aerated filter process is up to standard.It is dirty which is not suitable for activity
Mud system, and the required startup time is the longest.
Therefore conventional denitrification-nitrification biochemical treatment system has for containing high concentration simultaneously in water inlet
Start in the case of the waste water of machine thing and ammonia nitrogen in high density, especially start within the very fast time,
It is still difficult point and the key point of denitrification-nitrification biochemical treatment waste water technology, needs fundamentally
Solve, the successful Application of this technology could be promoted.
Summary of the invention
Enter at biochemical unit object for existing denitrification-nitrification biochemical processing process start-up technique
Exist when starting in the case of containing high-enriched organics and ammonia nitrogen in high density in water lacks simultaneously
Fall into, it is an object of the invention to provide one and quickly start denitrification-nitrification biochemical treatment system
Method, to overcome existing denitrification-nitrification biochemical treatment system routine to start the startup of method
During nitrobacteria ratio low, nitrobacteria easily runs off, system start-up is asked with instability slowly
Topic.
For reaching object above, the present invention adopts the technical scheme that:
A kind of method of quick startup denitrification-nitrification biochemical treatment system, described denitrification-
Nitrification biochemical treatment system contains high-enriched organics and ammonia nitrogen in high density for processing simultaneously
Waste water, this system includes: homogeneous unit, anoxic unit, aerobic unit and precipitation unit, lacks
Oxygen unit and aerobic unit are referred to as biochemical unit, it is characterised in that:
By oxidizing substance needed for increase denitrification in homogeneous unit or anoxic unit, carry
Front domestication denitrifying bacteria,
By adding to the outlet of homogeneous unit or anoxic unit or aerobic unit or aerobic unit
Iron compound improves sludge settling property in precipitation unit,
By iron ion in added iron compound beyond interpolation alkaline matter elimination dehydrogenation ferrum oxide
To denitrification and the suppression of nitration reaction.
On the basis of technique scheme, needed for described denitrification, oxidizing substance is: containing height
The material of valence state nitrogen.
On the basis of technique scheme, the described material containing high-valence state nitrogen be containing nitrate anion or
The material of nitrite anions, such as the waste water containing nitrate anion and/or nitrite anions or containing nitrate anion
And/or the solid of nitrite anions or liquid or waste liquid.
On the basis of technique scheme, described iron compound includes but not limited to: containing hydrogen-oxygen
Change ferrum or ferrous sulfate or iron sulfate or iron chloride or contain the suspended of the arbitrary above-mentioned substance of proportioning
Liquid or liquid or solid or waste liquid or waste water.
On the basis of technique scheme, when the iron compound added contains thing beyond hydrated ferric oxide.
During matter, keep biochemical unit pH value in the range of 6～9 by adding alkaline matter.
On the basis of technique scheme, described alkaline matter includes but not limited to: sodium carbonate
Solution or sodium hydroxide solution or sodium bicarbonate solution or the arbitrary above-mentioned alkaline matter Han proportioning
Solution.
On the basis of technique scheme, during denitrification-nitrification biochemical treatment system starts
Waste water is gradually added homogeneous unit by control order and flow, denitrification-nitrification biochemical treatment system
At the end of system starts, the water quality characteristic of the homogenizing waste water entering anoxic unit is:
Ammonia nitrogen concentration is 60～330mg/L,
COD concentration is 300～1500mg/L,
PH value between 6～9,
Homogenizing waste water has biodegradability, and biodegradability BOD represents with COD ratio, BOD
With COD ratio >=0.3.
On the basis of technique scheme, during denitrification-nitrification biochemical treatment system starts
It is directed to biochemical unit and adds kind of a mud, little by little increase waste strength or the stream entering biochemical unit
Amount or kind, kind of mud is cultivated and is tamed, until its adapt to completely target waste strength and
Flow；
Denitrification-nitrification biochemical treatment system starts end and refers to that kind of mud can adapt to target completely
Waste strength and kind and flow, index be enter the waste strength of homogeneous unit, flow and
Kind is in target zone and denitrification-nitrification biochemical treatment system water outlet reaches target call feelings
Run more than 2 weeks continuously under condition, and sludge concentration is able to maintain that at more than 1.5g/L.
On the basis of technique scheme, concretely comprise the following steps:
Step 1, waste water introduces homogeneous unit: when having multiply to intake, can be in proportion during startup
Introducing multiply is intake, or first introduces easy biochemical waste water and draw successively according still further to the method in step 8
Enter that concentration is higher, the worse waste water of biochemical；
Step 2, adds denitrification-nitrification biochemical treatment in anoxic unit and/or aerobic unit
System is used plants mud, adds in clear water or homogeneous unit in anoxic unit and aerobic unit
Water, opens aerobic unit Air supply facility and anoxic unit stirring facility, makes anoxic unit and aerobic
In unit, mud and water or waste water mix homogeneously, always can not reach 1～6 by filtration residue in making pond
g/L；
Step 3, opens mixed-liquor return；
Step 4, to the outlet one of homogeneous unit or anoxic unit or aerobic unit or aerobic unit
Secondary property adds and contains hydrated ferric oxide. or ferrous sulfate or iron sulfate or iron chloride or arbitrary containing proportioning
The suspension of above-mentioned substance or liquid or solid or waste liquid or waste water, the addition of ferrum element is for adding
Enter after ferrum element in biochemical unit always can not filtration residue amount 1～31%；
Step 5, adds the material containing high-valence state nitrogen to homogeneous unit, makes homogeneous unit structures
Interior COD concentration is 1～6 with the ratio of high-valence state nitrogen total concentration；
Stopping to the opportunity of the material that homogeneous unit addition contains high-valence state nitrogen is: step 8 was implemented
Cheng Zhong, treat in aerobic unit ammonia nitrogen concentration reduce or in aerobic unit the concentration of nitrate nitrogen higher than homogenizing
In unit when nitrate nitrogen and cultured water total concentration, or mud and muddy water mixed solution backflow itself can
When causing that the ratio of COD concentration and high-valence state nitrogen total concentration is 1～6 in homogeneous unit structures,
Or when cultured water concentration is higher than COD concentration in homogeneous unit, can stop or reducing addition and contain
The material of high-valence state nitrogen；
Step 6, the water outlet of homogeneous unit introduces anoxic unit and controls flow, anoxic unit
Muddy water mixed solution flows into aerobic unit, and the muddy water mixed solution of aerobic unit flows into precipitation unit to covering
After lid sludge reflux tube inlet, i.e. open sludge reflux；
Step 7, adjust Air supply facility make aerobic unit outlet dissolved oxygen concentration reach 2～
7mg/L；
Step 8, continuum micromeehanics continuous effluent is run, and monitors precipitation unit water outlet, treats its COD
Within index reaches water outlet requirement 160% and within ammonia nitrogen index reaches water outlet requirement 120%, increase
Add and enter the kind of waste water of homogeneous unit or improve and introduce the flow of waste water of homogeneous unit and dense
Spend 1.2～3 times that product is original value to flow and concentration, to anoxic unit and aerobic list
The mud of unit is tamed；
Operation adjusts biochemical unit pH in the range of 6～9 with alkaline matter；
In operation adjust Air supply facility keep aerobic unit outlet dissolved oxygen concentration reach 2～
7mg/L；
Step 9, enters the concentration of waste water of homogeneous unit and flow and kind reaches target zone,
Precipitation unit water outlet reaches target call in continuous more than 2 weeks, and sludge concentration is able to maintain that
More than 1.5g/L, startup terminates.
On the basis of technique scheme, during startup can to homogeneous unit or anoxic unit or
Aerobic unit adds clear water or other low concentration drainings, reduces biochemical unit initial COD concentration extremely
2 times of its precipitation unit water outlet desired value to 4 times, reduce ammonia nitrogen concentration go out to its precipitation unit
2 times of water desired value are to 4 times.
On the basis of technique scheme, in order to eliminate iron ion to denitrification and nitration reaction
Suppression, except add the situation that iron compound is hydrated ferric oxide. in addition to, adding with iron compound
Adding and be also added with alkaline matter simultaneously, addition method is:
When adding iron compound to homogeneous unit, adjust by adding alkaline matter to homogeneous unit
Save to biochemical unit water inlet pH value to >=6.0,
When adding iron compound to the outlet of anoxic unit or aerobic unit or aerobic unit, logical
Cross and add biochemical unit pH value >=6.0 of alkaline matter holding to this unit or homogeneous unit.
On the basis of technique scheme, denitrification-nitrification biochemical treatment system is used plants mud
Mud is discharged for municipal sewage plant mud, industrial effluent treatment plant's mud, anaerobic reactor
In one of arbitrarily or two kinds and the mixture of the arbitrary above-mentioned mud of above proportioning.
The method of quick startup denitrification-nitrification biochemical treatment system of the present invention, is giving birth to
Change and open in the case of unit object water inlet contains high-enriched organics and ammonia nitrogen in high density simultaneously
During dynamic denitrification-nitrification biochemical treatment system, ensure the fast of anti-nitre-nitrification biochemical treatment system
Speed starts, and starts denitrification-nitrification biochemical treatment system when using same kind mud and water inlet program
During system, the time using the method that provides of the present invention can shift to an earlier date at least three weeks completes to start, startup
Period standard water discharge rate significantly improves.
The present invention is by oxidisability thing needed for increase denitrification in homogeneous unit or anoxic unit
The matter material containing the high-valence state nitrogen such as nitrate anion or nitrite anions, tames denitrification thin in advance
Bacterium, accelerates the startup of system denitrification biochemical function, solves denitrifying bacteria domestication and is later than
During the nitrobacteria startup that causes of domestication, aerobic unit organic loading is high and then biochemical unit nitre
Change the problem that antibacterial ratio is low；
By adding to the outlet of homogeneous unit or anoxic unit or aerobic unit or aerobic unit
Iron compound improves sludge settling property in precipitation unit, and in having contained precipitation unit, mud returns
Flow smooth and sludge loss problem；
Meanwhile, biochemical in order to avoid adding denitrification and nitrification of the iron salt beyond hydrated ferric oxide.
Reaction suppression, by add simultaneously alkaline matter (sodium carbonate liquor or sodium hydroxide solution or
Sodium bicarbonate solution or the waste liquid containing the arbitrary above-mentioned alkaline matter of proportioning) keep biochemical unit
PH value, in the range of 6～9, eliminates and adds the iron salt beyond hydrated ferric oxide. to denitrification-nitre
Change the impact of biochemical reaction；
By using above measure to start denitrification-nitrification biochemical treatment system, it is thus achieved that be better than
The effect that the fast and stable of conventional Starting mode starts, and during startup, standard water discharge rate improves.
Accompanying drawing explanation
The present invention has a drawings described below:
Fig. 1 is conventional denitrification-nitrification biochemical treatment system schematic flow sheet.
Fig. 2 is that the denitrification-nitrification biochemical treatment system flow process that quickly starts of the present invention is illustrated
Figure.
Note 1: Fig. 1,2 all eliminates the standard elements such as pretreatment, eliminate multipoint water feeding,
The routine operation details such as multiply water inlet, pH regulator, nutritive salt add, multi-stage aeration, but not
The selectivity affecting various standard element and operational approach uses and associativity use.
Waste water in note 2: Fig. 1,2 can be multiply sewage or waste water, combined sewage or useless
Water.Such as: can be the multiply waste water discharged of multiple process units, or multiple process units
The composite waste of discharge waste water, or municipal sewage, or it is mixed into the multiply waste water of municipal sewage,
Or it is mixed into the composite waste of municipal sewage.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail.
The present invention startup to conventional denitrification-nitrification biochemical treatment system as shown in Figure 1
Process is studied.In conventional denitrification-nitrification biochemical treatment system, anoxic unit
The high-valence state nitrogen such as oxidizing substance nitrate anion or nitrite anions needed for middle denitrification, from ammonia
The lower valency nitrogen such as nitrogen or blood urea nitrogen is at the product of aerobic unit nitration oxidation, and conventional start-up course is certainly
So first cultivate domestication nitrifier to aoxidize to finite concentration, the nitrate anion of system or nitrite anions etc.
Property material could be cultivated after having certain generation speed and tame out denitrifying bacterium, as
201010136902.X(CN101774693B) etc. Starting mode, denitrification biochemical reaction
There are necessarily being later than the generation of nitrification biochemical reaction, 200910219411.9 Hes
200710010384.5(CN101239751) nitrifier cultivated is biochemical for denitrification-nitrification
When processing system starts, the denitrifying capacity of system also needs for the domestication by certain time
Obtain.Therefore during conventional denitrification-nitrification biochemical treatment system starts, denitrification removal has
The effect of machine thing is little, aerobic bacteria to be leaned on remove, biochemistry pool (biochemistry pool generally comprise oxygen compatibility pool and
Aeration tank, in denitrification-nitrification biochemical treatment system, mud returns oxygen compatibility pool, then flows into
Aeration tank, oxygen compatibility pool and Aeration tank mud contain the most isocyatic denitrifying bacterium, nitre simultaneously
Change bacterium and aerobic bacteria.In), the concentration of aerobic bacteria is higher than concentration time properly functioning, and nitrifier
Concentration, less than concentration time properly functioning, reduces the ratio of biochemical unit nitrobacteria naturally,
Add the biochemical unit in system itself cultivate and retain the difficulty of nitrobacteria.
The present invention the most also finds, processes and contains high-enriched organics and high strength ammonia simultaneously
During the waste water of nitrogen, during starting and running denitrification-nitrification biochemical treatment system, heavy
Shallow lake unit occurs in that serious Mud up-floating problem, and mud floats then with water outlet from precipitation unit
Running off, first result in water outlet SS the most up to standard, biochemistry pool mud reduces then, and biochemical reaction subtracts
Weak, water outlet COD, ammonia nitrogen etc. are the most up to standard.The detailed process of precipitation unit generation sludge loss
It is: after system has denitrifying capacity that denitrification can occur in causing precipitation unit, thus
Mud flco or mud bed gassiness in precipitation unit, cause sludge reflux smooth until on mud
Floating, mud runs off with scraping slag operation, though serious time cause stopping discharging excess sludge, system
Sludge age does not increases；Mud runs off with water outlet simultaneously, now goes out aqueous suspension and raises, water outlet
Float (SS) can exceed that discharge standard.The precipitation unit sludge loss that denitrification causes is asked
Topic must solve, and denitrification-nitrification biochemical treatment system just can be made to start smoothly and run.
As in figure 2 it is shown, quick startup denitrification-nitrification biochemical treatment system of the present invention
Method, comprise the following steps:
Contain high-enriched organics and ammonia nitrogen in high density in biochemical unit object water inlet simultaneously
In the case of start denitrification-nitrification biochemical treatment system time:
Contained by oxidizing substance needed for adding denitrification in homogeneous unit or anoxic unit
The material of high-valence state nitrogen is (containing nitrate anion or the material of nitrite anions, as containing nitrate anion and/or Asia
The waste water of nitrate anion or containing nitrate anion/or the solid of nitrite anions or liquid or waste liquid), come
Tame denitrifying bacterium in advance, accelerate the startup of system denitrification biochemical function, solve anti-nitre
Change aerobic unit organic loading during bacteria domestication is later than the startup that nitrobacteria domestication causes high
And then the problem that biochemistry unit nitrobacteria ratio is low；
By adding to the outlet of homogeneous unit or anoxic unit or aerobic unit or aerobic unit
Iron compound improves sludge settling property in precipitation unit, and in having contained precipitation unit, mud returns
Flow smooth and sludge loss problem；Described iron compound includes but not limited to: containing hydrated ferric oxide. or
Ferrous sulfate or iron sulfate or iron chloride or the suspension containing the arbitrary above-mentioned substance of proportioning or liquid
Body or solid or waste liquid or waste water.Such as: containing hydrated ferric oxide. or ferrous sulfate or iron sulfate or chlorine
Change the suspension of ferrum or liquid or solid or waste liquid or waste water, or: sub-containing hydrated ferric oxide., sulphuric acid
The arbitrary suspension of two or more proportionings or liquid or solid or useless in ferrum, iron sulfate, iron chloride
Liquid or waste water.
When material beyond the iron compound added is containing hydrated ferric oxide., by adding basic species quality guarantee
Hold biochemical unit pH value in the range of 6～9, it is therefore an objective to eliminate the iron compound (hydrogen-oxygen added
Change except ferrum) in iron ion to denitrification and the suppression of nitration reaction.Described alkaline matter includes
But it is not limited to: sodium carbonate liquor or sodium hydroxide solution or sodium bicarbonate solution, or appoints containing proportioning
The solution of the above-mentioned alkaline matter of meaning.Such as: in containing sodium carbonate, sodium hydroxide, sodium bicarbonate
The arbitrary solution of two or more proportionings.
By using above measure, denitrification-nitrification biochemical treatment system obtains and is better than routine
The effect that the fast and stable of Starting mode starts.
On the basis of technique scheme, during denitrification-nitrification biochemical treatment system starts
Waste water is gradually added homogeneous unit by control order and flow, denitrification-nitrification biochemical treatment system
At the end of system starts, the water quality characteristic of the homogenizing waste water entering anoxic unit is: ammonia nitrogen concentration is
60～330mg/L, COD concentration is 300～1500mg/L, and pH value is between 6～9, all
Matter waste water has biodegradability, and its biodegradability BOD represents with COD ratio, its BOD with
COD ratio (B/C) >=0.3.
Denitrification-nitrification biochemical treatment system refers to during starting: add kind of a mud to biochemical unit,
Little by little increase and enter the waste strength of biochemical unit or flow or kind, kind of mud is cultivated
And domestication, until it adapts to target waste strength and flow completely；
Denitrification-nitrification biochemical treatment system starts end and refers to: plants mud and can adapt to mesh completely
Marking waste strength and kind and flow, index is to enter the waste strength of homogeneous unit, flow
In target zone and denitrification-nitrification biochemical treatment system water outlet reaches target call with kind
In the case of run more than 2 weeks continuously, and sludge concentration is able to maintain that at more than 1.5g/L.
On the basis of technique scheme, quickly start denitrification-nitrification biochemical treatment system
Concretely comprise the following steps:
Step 1, waste water introduces homogeneous unit: when having multiply to intake, can be in proportion during startup
Introducing multiply is intake, or first introduces easy biochemical waste water and draw successively according still further to the method in step 8
Enter that concentration is higher, the worse waste water of biochemical；
During startup can to homogeneous unit or anoxic unit or aerobic unit add clear water or other
Low concentration draining, reduces biochemical unit initial COD concentration to its precipitation unit water outlet desired value
2 times to 4 times, reduce ammonia nitrogen concentration to 2 times of its precipitation unit water outlet desired value to 4 times；
Step 2, adds denitrification-nitrification biochemical treatment in anoxic unit and/or aerobic unit
System is used plants mud, and denitrification-nitrification biochemical treatment system mud of planting used can be municipal wastewater
Treatment plant's mud (municipal sewage plant mud, as oxygen compatibility pool (anoxic pond), Aeration tank,
Excess sludge after mud mixture in digester or excess sludge or dehydration), industrial wastewater
Treatment plant's mud, anaerobic reactor discharge in mud one of arbitrarily or two kinds and above proportioning are appointed
The mixture of the above-mentioned mud of meaning；Clear water or homogenizing list is added in anoxic unit and aerobic unit
Water in unit；Open aerobic unit Air supply facility and anoxic unit stirring facility, make anoxic unit
With mud in aerobic unit and water or waste water mix homogeneously, make in pond always can not filtration residue (i.e.
Water sample stays material on the filter after quantitative filter paper filters, and is dried to perseverance in 103～105 DEG C
Recuperation to material amount) reach 1～6g/L；
Step 3, opens mixed-liquor return；
Step 4, to the outlet one of homogeneous unit or anoxic unit or aerobic unit or aerobic unit
Secondary property adds and contains hydrated ferric oxide. or ferrous sulfate or iron sulfate or iron chloride or arbitrary containing proportioning
The suspension of above-mentioned substance or liquid or solid or waste liquid or waste water, the addition of ferrum element (with
Total ferrum characterizes, and sees GB14506.5-2010) in unit biochemical after adding ferrum element total the most not
May filter that (i.e. water sample stays material on the filter to level of residue after filtering, in 103～105 DEG C
Dry to constant weight the material amount obtained) 1～31%；
In order to eliminate iron ion to denitrification and the suppression of nitrification biochemical reaction, except the iron content added
Material is beyond the situation of hydrated ferric oxide., is also added with basic species with the interpolation of iron compound simultaneously
Matter, addition method is:
When adding iron compound to homogeneous unit, adjust by adding alkaline matter to homogeneous unit
Save to biochemical unit water inlet pH value to >=6.0,
When adding iron compound to the outlet of anoxic unit or aerobic unit or aerobic unit, logical
Cross and add biochemical unit pH value >=6.0 of alkaline matter holding to this unit or homogeneous unit；
Ferrum addition concentration is the highest, and alkaline matter addition is the biggest, and alkaline matter can be sodium carbonate
Solution or sodium hydroxide solution or sodium bicarbonate solution or the arbitrary above-mentioned alkaline matter Han proportioning
Waste liquid；
Step 5, adds the material containing high-valence state nitrogen to homogeneous unit, makes homogeneous unit structures
Interior COD concentration is 1～6 with the ratio of high-valence state nitrogen total concentration；
With step 8 kind of waste water, the raising of organic concentration, note increasing adding of high-valence state nitrogen
Enter total amount；
Stopping to the opportunity of the material that homogeneous unit addition contains high-valence state nitrogen is: implement in step 8
During, treat in aerobic unit ammonia nitrogen concentration reduce or in aerobic unit the concentration of nitrate nitrogen higher than all
In matter unit when nitrate nitrogen and cultured water total concentration, or mud and muddy water mixed solution backflow itself
May result in the ratio of COD concentration and high-valence state nitrogen total concentration in homogeneous unit structures is 1～6
Time, or when in homogeneous unit, cultured water concentration is higher than COD concentration, can stop or reducing adding
Enter containing high-valence state nitrogen material；
(thing containing nitrate anion or nitrite anions is referred to by oxidizing substance needed for adding denitrification
Matter), the high-valence state nitrogen in increase system, carry out the domestication of denitrifying bacterium in advance, solve
During startup, denitrifying bacterium domestication is later than nitrifier domestication, and in aerobic unit, the concentration of aerobic bacteria is high
Concentration when properly functioning, and nitrifier concentration is less than the problem of concentration time properly functioning；
Step 6, the water outlet of homogeneous unit introduces anoxic unit and controls flow, anoxic unit
Muddy water mixed solution flows into aerobic unit, and the muddy water mixed solution of aerobic unit flows into precipitation unit to covering
After lid sludge reflux tube inlet, i.e. open sludge reflux；
Step 7, adjust Air supply facility make aerobic unit outlet dissolved oxygen concentration reach 2～
7mg/L；
Step 8, continuum micromeehanics continuous effluent is run, and monitors precipitation unit water outlet, treats its COD
(containing 160%) and ammonia nitrogen index reaches water outlet requirement 120% within index reaches water outlet requirement 160%
Within (containing 120%), increase enter homogeneous unit kind of waste water or improve introduce homogeneous unit
The flow of waste water and concentration to 1.2～3 times that product is original value of flow and concentration, right
The mud of anoxic unit and aerobic unit is tamed；
Operation adjusts biochemical unit pH in the range of 6～9 with alkaline matter；
In operation adjust Air supply facility keep aerobic unit outlet dissolved oxygen concentration reach 2～
7mg/L；
Step 9, enters the concentration of waste water of homogeneous unit and flow and kind reaches target zone,
Precipitation unit water outlet reaches target call in continuous more than 2 weeks, and sludge concentration is able to maintain that
More than 1.5g/L, startup terminates.
It is an advantage of the current invention that:
1, add the high-valence state nitrogen such as nitrate anion or nitrite anions, make system denitrification function and
Nitrification function is tamed simultaneously, and during solving startup, biochemical unit nitrobacteria ratio is low
Problem；
2, disposably add the iron compounds such as hydrated ferric oxide. in initial start stage, cause ferrum element
Addition account in biochemical unit always can not filtration residue amount 1～31%, inhibit rapidly dirt
Mud is in the floating of second pond and loss；
3, keep biochemical unit pH value in the range of 6～9 by adding alkaline matter, eliminate
Add the iron salt impact on biochemical reaction；
By starting measure more than using, denitrification-nitrification biochemical treatment system obtains and is better than
The effect that the fast and stable of conventional Starting mode starts, has started early more than 3 weeks, and has started
Period standard water discharge rate improves.
It is below specific embodiment:
Embodiment 1
Technical solution of the present invention discharges waste water about 20t/h, coal for Treatment of Cyclohexanone process units
Gasification installation discharges waste water about 80t/h and municipal sewage about 200t/h, cyclohexanone production apparatus
Discharging waste water COD and be about 1500mg/L, coal gasification apparatus is discharged waste water COD and is about
1000mg/L, ammonia nitrogen are about 700mg/L, municipal sewage COD and are about 300mg/L, and ammonia nitrogen is about
For 30mg/L；Oxygen compatibility pool and Aeration tank total measurement (volume) are 8000m3；3 strands of waste water are mixed in homogenizing pond
Closing into anoxic unit waste water COD is 400～700mg/L, NH3-N is 100～250mg/L,
B/C is 0.5～0.7；Water outlet requires COD≤60mg/L, NH3-N≤15mg/L；Zhong Niwei city
Political affairs sewage treatment plant residual mud；Improve enter the wastewater flow of homogenizing pond structures or increase into
The opportunity of the kind of waste water entering homogenizing pond structures is that precipitation unit effluent COD concentration reaches
Below 108mg/L, ammonia nitrogen concentration reach below 18mg/L.
Start-up course is as follows:
Municipal sewage 100t/h is first introduced to homogenizing pond；Municipal administration is added to oxygen compatibility pool and Aeration tank
Sewage treatment plant residual mud is to full pond；Open oxygen compatibility pool stirring facility and Aeration tank Air supply facility
Make mud and waste water mix homogeneously, open mixed-liquor return, now total in oxygen compatibility pool and Aeration tank
Can not filtration residue amount be 6g/L(i.e. seed sludge amount be 6g/L), sludge volume index (SVI)
For 150ml/g；Dissolve ferrous sulfate heptahydrate 2438kg, form solution 50m3, add homogenizing pond
In, dissolve powdered sodium carbonate 1100kg simultaneously, form solution 50m3, add homogenizing pond, all
In matter pond, pH is maintained 6.0～7.5；Add in the warp that nitric acid production plant is discharged to homogenizing pond
(being substantially free of organic thing, composition is mainly about 1.5wt%'s to the waste water containing nitrate anion after with
Sodium nitrate) 6.5～14t/h, the waste water the concentration of nitrate nitrogen making homogenizing pond flow to oxygen compatibility pool is about
150～300mg/L, in the structures of homogenizing pond, COD concentration is about with the ratio of the concentration of nitrate nitrogen
1～2；Treat that homogenizing pond waste water flows into oxygen compatibility pool and causes Aeration tank mud mixture to flow into precipitation unit
And after covering sludge reflux tube inlet, open sludge reflux；Adjusting Air supply facility makes Aeration tank go out
Mouth dissolved oxygen concentration reaches 2～7mg/L；Start continuum micromeehanics continuous effluent to run, now supervise
Surveying Aeration tank sludge volume index (SVI, it is possible to be referred to as sludge settling ratio) is 140ml/g,
Measure ferrum element addition be now in biochemistry pool always can not filtration residue 1%, monitoring precipitation
Unit water outlet, determines after 3 days that its COD concentration reaches below 108mg/L, and ammonia nitrogen concentration reaches
Below 18mg/L, raising municipal sewage addition, to desired value about 200t/h, i.e. enters homogenizing
The waste strength in pond and flow product increase to original 2 times, improve the waste water Han nitrate anion simultaneously
Addition be original 2 times, make COD concentration and the concentration of nitrate nitrogen in the structures of homogenizing pond
Ratio keeps being about 1～2；Monitoring precipitation unit water outlet, determines after 3 days that its COD concentration reaches
Below 108mg/L, ammonia nitrogen concentration reaches below 18mg/L, increases coal gasification waste water 20t/h,
The ammonia nitrogen in waste water concentration i.e. entering homogenizing pond increases to original 3 times with flow product；Monitoring is heavy
Shallow lake unit water outlet, determines after 1 week that its COD concentration reaches below 108mg/L, and ammonia nitrogen concentration reaches
To below 18mg/L, increase coal gasification waste water, to 80t/h, stops the waste water Han nitrate anion simultaneously
Addition, add sodium bicarbonate solution maintain aerobic unit pH >=6.3；Monitoring precipitation unit goes out
Water, determines after 2 weeks that its COD concentration reaches below 108mg/L, and ammonia nitrogen concentration reaches 18mg/L
Hereinafter, add cyclohexanone production apparatus and discharge waste water about 20t/h；Monitoring precipitation unit water outlet,
Determine after 3 days that its COD reaches below 80mg/L and ammonia nitrogen concentration reaches below 15mg/L and ties up
Hold continuous 2 weeks, in biochemistry pool, always filtration residue amount can not be about 4.2g/L, sludge settling ratio
(SVI) being 165ml/g, startup terminates, the most about 6 weeks.
Comparative example 1
Start by the flow condition of embodiment 1, seed sludge condition, but do not add nitric acid
Root and ferrum element.
Correlation technique scheme discharges waste water about 20t/h, coal gas for Treatment of Cyclohexanone process units
Gasifying device discharges waste water about 80t/h and municipal sewage about 200t/h, and cyclohexanone production apparatus is arranged
Go out waste water COD and be about 1500mg/L, coal gasification apparatus discharge waste water COD be about 1000mg/L,
Ammonia nitrogen is about 700mg/L, municipal sewage COD and is about 300mg/L, and ammonia nitrogen is about 30mg/L；
Oxygen compatibility pool and Aeration tank total measurement (volume) are 8000m3；3 strands of waste water are mixed into anoxia list in homogenizing pond
Unit's waste water COD is 700～1000mg/L, NH3-N is 150～220mg/L, B/C be 0.5～
0.7；Water outlet requires COD≤60mg/L, NH3-N≤15mg/L；Planting mud is that municipal wastewater processes
Plant excess sludge.Improve and enter the wastewater flow of homogenizing pond structures or increase entrance homogenizing pond structure
The opportunity of the kind of waste water building thing be precipitation unit effluent COD concentration reach below 108mg/L,
Ammonia nitrogen concentration reaches below 18mg/L.
Start-up course is as follows:
Municipal sewage 100t/h is first introduced to homogenizing pond；Municipal administration is added to oxygen compatibility pool and Aeration tank
Sewage treatment plant residual mud is to full pond；Open oxygen compatibility pool stirring facility and Aeration tank Air supply facility
Make mud and waste water mix homogeneously, open mixed-liquor return, now total in oxygen compatibility pool and Aeration tank
Can not filtration residue amount be 6g/L, sludge volume index (SVI, it is possible to be referred to as sludge settling ratio)
For 150ml/g；Treat that homogenizing pond waste water flows into oxygen compatibility pool and causes Aeration tank mud mixture to flow into
Precipitation unit after covering sludge reflux tube inlet, opens sludge reflux；Adjustment Air supply facility makes
Aeration tank outlet dissolved oxygen concentration reaches 2～7mg/L；Start continuum micromeehanics continuous effluent to run,
Now monitoring Aeration tank sludge volume index (SVI) is 165ml/g, and monitoring precipitation unit goes out
Water, determines after 5 days that its COD concentration reaches below 108mg/L, and ammonia nitrogen concentration reaches 18mg/L
Hereinafter, municipal sewage addition giving up to desired value about 200t/h, i.e. entrance homogenizing pond is improved
Water concentration and flow product increase to original 2 times；Monitoring precipitation unit water outlet, after 5 days really
Its COD concentration fixed reaches below 108mg/L, and ammonia nitrogen concentration reaches below 18mg/L, increases
Coal gasification waste water 20t/h, the ammonia nitrogen in waste water concentration i.e. entering homogenizing pond increases to flow product
3 times originally；Monitoring precipitation unit water outlet, within 1 week, postprecipitation unit there occurs Mud up-floating,
Determining after continuing to run with 2 weeks that its COD concentration reaches below 108mg/L, ammonia nitrogen concentration reaches
Below 18mg/L, increase coal gasification waste water to 80t/h；Monitoring precipitation unit water outlet, water outlet is hanged
Have during float and exceed standard, add sodium bicarbonate solution and maintain aerobic unit pH >=6.3, after 4 weeks really
Its COD concentration fixed reaches below 108mg/L, and ammonia nitrogen concentration reaches below 18mg/L, adds
Cyclohexanone production apparatus discharges waste water about 20t/h；Monitoring precipitation unit water outlet, determined after 1 week
Its COD reaches below 80mg/L and ammonia nitrogen concentration reaches below 15mg/L and maintains continuous 2 weeks,
Always filtration residue amount can not be about 2.9g/L in biochemistry pool, sludge settling ratio (SVI) is 260
Ml/g, startup terminates, the most about 11.5 weeks.Longer 5 weeks than embodiment 1 starts, and
At the end of sludge settling property unit sludge quantity poorer than embodiment 1, biochemical few, start during go out
Water causes compliance rate low compared with embodiment by 30% because SS exceeds standard.
Embodiment 2
Technical solution of the present invention discharges waste water about 10L/d, coal for Treatment of Cyclohexanone process units
Gasification installation discharges waste water about 40L/d, waste water about 5L/d discharged by rubber antiager RD process units
With recirculated cooling water sewer about 100L/d, cyclohexanone production apparatus is discharged waste water COD and is about
1500mg/L, coal gasification apparatus discharge waste water COD be about 1000mg/L, ammonia nitrogen be about 500～
700mg/L, rubber antiager RD process units discharge waste water COD be about 9000～
15000mg/L, recirculated cooling water sewer COD are about 80mg/；Anoxic unit and aerobic list
The total dischargeable capacity of unit is 250L；4 strands of waste water are mixed into anoxic unit waste water COD in homogenizing pond
It is 550～1000mg/L, NH3-N is 100～200mg/L, and B/C is 0.3～0.5；Water outlet
Require COD≤80mg/L, NH3-N≤15mg/L；Planting mud is that industrial effluent treatment plant's anoxic pond is dirty
Mud；Improve that to enter wastewater flow opportunity of homogeneous unit structures be that precipitation unit water outlet COD is dense
Degree reaches below 128mg/L, ammonia nitrogen concentration reaches below 18mg/L.
Start-up course is as follows:
First introduce each stock waste water in the treating capacity ratio of each stock waste water to homogeneous unit so that it is COD,
Ammonia nitrogen concentration, pH value reach target inflow requirement；Industrial Wastewater Treatment is added to biochemical unit
In factory's anoxic pond mud, mud mixture is to the 95% of pond dischargeable capacity；Unlatching anoxic unit stirs
Facility and aerobic unit Air supply facility make mud and waste water mix homogeneously, open mixed-liquor return,
Can not filtration residue amount be always now 3.4g/L in anoxic unit and aerobic unit, mud volume
Index (SVI, also referred to as sludge settling ratio) is 278ml/g；Add to anoxia and aerobic unit
(this is suspended from the filter in chlorobenzene production device waste water and after filter pressing for suspension containing hydrated ferric oxide.
Cake is again with water-dispersible) and evenly spread to biochemical unit, now monitoring Aeration tank mud amasss index
(SVI) being 140ml/g, measuring ferrum element addition for always not may filter that in now biochemistry pool
The 20% of residue；Add homogeneous unit after being dissolved by sodium nitrate solid, make homogenizing pond flow to oxygen of holding concurrently
In the waste water in pond, the concentration of nitrate nitrogen is about 240～340mg/L, COD in homogeneous unit structures
Concentration is about 2～3 with the ratio of the concentration of nitrate nitrogen；Treat that homogenizing pond waste water flows into oxygen compatibility pool and causes
After Aeration tank mud mixture flows into precipitation unit and covers sludge reflux tube inlet, open mud
Backflow；Adjusting Air supply facility makes Aeration tank outlet dissolved oxygen concentration reach 2～7mg/L；Start
Continuum micromeehanics 10L/d runs, and monitors precipitation unit water outlet, determines its COD concentration after 18 days
Reaching below 128mg/L, ammonia nitrogen concentration reaches below 18mg/L, improves inflow to about
20L/d, the waste strength i.e. entering homogenizing pond increases to original 2 times with flow product, dimension
Hold sodium nitrate addition constant, make COD concentration and the concentration of nitrate nitrogen in homogeneous unit structures
Ratio is about 4～6；Continue monitoring precipitation unit water outlet, after 10 days, determine that its COD concentration reaches
To below 128mg/L, ammonia nitrogen concentration reaches below 18mg/L, improves inflow to about 60L/d,
Improve sodium nitrate addition is 2 times on last stage simultaneously, makes COD in homogeneous unit structures
Concentration is about 2.7～4 with the ratio of the concentration of nitrate nitrogen；Continuation monitoring precipitation unit water outlet, 10
Determining after it that its COD concentration reaches below 128mg/L, ammonia nitrogen concentration reaches below 18mg/L,
Raising inflow, to desired value about 155L/d, stops the addition of sodium nitrate simultaneously；Continue monitoring
Precipitation unit water outlet, determines after 11 days that its COD concentration reaches below 80mg/L, ammonia nitrogen concentration
Reach below 15mg/L, maintain water outlet up to standard to run continuously 2 weeks, always can not mistake in biochemistry pool
Filter level of residue is about 4.4g/L, and sludge volume index (SVI) is 150ml/g, and startup terminates,
Time-consuming 9 weeks.
Comparative example 2
Start by the flow condition of embodiment 2, seed sludge condition, but do not add nitric acid
Root and ferrum element.
Correlation technique scheme discharges waste water about 10L/d, coal gas for Treatment of Cyclohexanone process units
Gasifying device discharges waste water about 40L/d, waste water about 5L/d discharged by rubber antiager RD process units
With recirculated cooling water sewer about 100L/d, cyclohexanone production apparatus is discharged waste water COD and is about
1500mg/L, coal gasification apparatus discharge waste water COD be about 1000mg/L, ammonia nitrogen be about 500～
700mg/L, rubber antiager RD process units is discharged waste water COD and is about 15000mg/L, follows
Ring cooling water drainage COD of sewage is about 80mg/；Anoxic unit and the total dischargeable capacity of aerobic unit are
250L；4 strands of waste water be mixed in homogenizing pond anoxic unit waste water COD be 550～
1000mg/L、NH3-N is 100～200mg/L, and B/C is 0.3～0.5；Water outlet requires COD
≤ 80mg/L, NH3-N≤15mg/L；Planting mud is industrial effluent treatment plant's anoxic pond mud；Carry
The high wastewater flow opportunity entering homogeneous unit structures is that precipitation unit effluent COD concentration reaches
Below 18mg/L is reached to below 128mg/L, ammonia nitrogen concentration.
Start-up course is as follows:
First introduce each stock waste water in the treating capacity ratio of each stock waste water to homogeneous unit so that it is COD,
Ammonia nitrogen concentration, pH value reach target inflow requirement；Industrial Wastewater Treatment is added to biochemical unit
In factory's anoxic pond mud, mud mixture is to the 95% of pond dischargeable capacity；Unlatching anoxic unit stirs
Facility and aerobic unit Air supply facility make mud and waste water mix homogeneously, open mixed-liquor return,
Can not filtration residue amount be always now 3.4g/L in anoxic unit and aerobic unit, mud volume
Index (SVI, also referred to as sludge settling ratio) is 278ml/g；Treat that homogenizing water waste water flows into hold concurrently
After oxygen pond causes Aeration tank mud mixture to flow into precipitation unit and cover sludge reflux tube inlet,
Open sludge reflux；Adjust Air supply facility make Aeration tank outlet dissolved oxygen concentration reach 2～
7mg/L；Start continuum micromeehanics 10L/d to run, monitor precipitation unit water outlet, determine after 21 days
Its COD concentration reaches below 108mg/L, and ammonia nitrogen concentration reaches below 18mg/L, improve into
The water yield is to about 20L/d, and the waste strength i.e. entering homogenizing pond increases to original with flow product
2 times；Continue monitoring precipitation unit water outlet, after 14 days, the most not can determine that its COD concentration reaches
Below 128mg/L, ammonia nitrogen concentration reaches below 18mg/L, but in biochemistry pool sludge concentration is only
Surplus 1.2g/L, mud SVI reach 400ml/g, continuation raising inflow to about 60L/d；Continue
Continuous monitoring precipitation unit water outlet, determines after 28 days that its COD concentration reaches below 128mg/L,
Ammonia nitrogen concentration reaches below 18mg/L, but sludge settling ratio (SVI) reaches 480ml/g,
Improve inflow to desired value about 155L/d；Continue monitoring precipitation unit water outlet, after 21 days really
Its COD concentration fixed reaches below 80mg/L, and ammonia nitrogen concentration reaches below 15mg/L, and maintenance reaches
Mark water to run continuously 2 weeks, in biochemistry pool, always filtration residue amount can not be about 1.9g/L, dirty
Mud volume index (SVI) is 400ml/g, and startup terminates, time-consuming 14 weeks, than embodiment 2
Start time-consuming long 5 weeks, at the end of sludge settling property unit mud poorer than embodiment 2, biochemical
Amount is few, and in start-up course, sludge settling property causes the muddy water mixing when practical application in industry
Thing is difficult to separated in precipitation unit and carry out sludge reflux.
Embodiment 3
Technical solution of the present invention discharges waste water about 10L/d and city for gas treatment gasifying device
Sewage about 100L/d, coal gasification apparatus is discharged waste water COD and is about 1000mg/L, ammonia nitrogen about
700mg/L, municipal sewage COD are about 300mg/L, and ammonia nitrogen is about 30mg/L；Oxygen compatibility pool and
Aeration tank total measurement (volume) is 60L；2 strands of waste water are mixed into anoxic unit waste water COD in homogenizing pond
It is 300～400mg/L, NH3-N is 60～120mg/L, and B/C is 0.6～0.9；Water outlet is wanted
Ask COD≤60mg/L, NH3-N≤15mg/L；Planting mud is municipal sewage plant digester mud；
Improve and enter the wastewater flow of homogenizing pond structures or increase the waste water entering homogenizing pond structures
The opportunity of kind is that precipitation unit effluent COD concentration reaches below 108mg/L, ammonia nitrogen concentration reaches
To below 18mg/L.
Start-up course is as follows:
First introduce each stock waste water in the treating capacity ratio of each stock waste water to homogeneous unit so that it is COD,
Ammonia nitrogen concentration, pH value reach target inflow requirement；Add municipal wastewater to biochemical unit to process
Factory's digester mud, to the 17% of biochemical unit dischargeable capacity, adds municipal sewage to effectively holding
Long-pending 100%；Open anoxic unit stirring facility and aerobic unit Air supply facility makes mud and gives up
Water mix homogeneously, opens mixed-liquor return, now always can not mistake in anoxic unit and aerobic unit
Filter level of residue is 1g/L, and sludge volume index (SVI, also referred to as sludge settling ratio) is 100ml/g；
Add the iron chloride and the sodium hydroxide of dissolving dissolved to homogeneous unit, in homogeneous unit, pH protects
Hold is 7.0～8.5；Add homogeneous unit after being dissolved by sodium nitrate solid, make homogenizing pond flow to
In the waste water of oxygen compatibility pool, the concentration of nitrate nitrogen is about 120～150mg/L, in homogeneous unit structures
COD concentration is about 2.5～3 with the ratio of the concentration of nitrate nitrogen；Treat that homogenizing water waste water flows into oxygen of holding concurrently
Pond causes Aeration tank mud mixture to flow into precipitation unit, opens sludge reflux；Adjustment oxygen supply sets
Execute and make Aeration tank outlet dissolved oxygen concentration reach 2～7mg/L；Start continuum micromeehanics 30L/d fortune
OK, monitor precipitation unit water outlet, after 7 days, determine that its COD concentration reaches below 108mg/L,
Ammonia nitrogen concentration reaches below 18mg/L, detection ferrum element addition be now in biochemistry pool the most not
May filter that the 31% of residue, now monitoring Aeration tank mud amasss index (SVI) is 60ml/g；
Improve inflow to increase to about 60L/d, the waste strength i.e. entering homogenizing pond with flow product
2 times originally, maintain sodium nitrate addition constant, make COD concentration in homogeneous unit structures
Keep being about 5～6 with the ratio of the concentration of nitrate nitrogen；Continuation monitoring precipitation unit water outlet, 10 days
After determine that its COD concentration reaches below 108mg/L, ammonia nitrogen concentration reaches below 18mg/L,
Raising inflow, to desired value about 110L/d, stops the addition of sodium nitrate simultaneously；Continue monitoring
Precipitation unit water outlet, determines after 11 days that its COD concentration reaches below 60mg/L, ammonia nitrogen concentration
Reach below 15mg/L, maintain water outlet up to standard to run continuously 2 weeks, always can not mistake in biochemistry pool
Filter level of residue is about 4.5g/L, and sludge volume index (SVI) is 80ml/g, and startup terminates,
Time-consuming 5 weeks.
Embodiment 4
Technical solution of the present invention discharges waste water about 35L/d and circulation for gas treatment gasifying device
Cooling water drainage sewage about 50L/d and 4-aminodiphenylamine process units discharge waste water 0.75～1L/d and ring
Waste water about 6L/d discharged by hexanone process units, and coal gasification apparatus is discharged waste water COD and is about
1000mg/L, ammonia nitrogen are about 700mg/L, recirculated cooling water sewer COD and are about 80mg/L,
4-aminodiphenylamine process units is discharged waste water COD and is about 80000～110000mg/L；Oxygen compatibility pool and exposure
Gas pond total measurement (volume) is 75L；4 strands of waste water are mixed into anoxic unit waste water COD in homogenizing pond and are
1000～1500mg/L, NH3-N is 160～330mg/L, and B/C is 0.4～0.8；Water outlet is wanted
Ask COD≤80mg/L, NH3-N≤15mg/L；Planting mud is that municipal sewage plant excess sludge takes off
Pat of cement；Improve and enter the wastewater flow of homogenizing pond structures or increase entrance homogenizing pond structures
Opportunity of kind of waste water be that precipitation unit effluent COD concentration reaches below 128mg/L, ammonia nitrogen
Concentration reaches below 18mg/L.
Start-up course is as follows:
First introduce each stock waste water in the treating capacity ratio of each stock waste water to homogeneous unit so that it is COD,
Ammonia nitrogen concentration, pH value reach target inflow requirement；Add municipal wastewater to biochemical unit to process
Mud cake after plant excess sludge dehydration, its Adding Way is: the time of storage is less than the mud of 3 days
Cake is mixed into recirculated cooling water sewer, pumps into through sludge delivery pump, adds recirculated cooling water row
Sewage is to the 100% of dischargeable capacity；Open anoxic unit stirring facility and aerobic unit oxygen supply sets
Execute and make mud and waste water mix homogeneously, open mixed-liquor return, now anoxic unit and aerobic list
Can not filtration residue amount be always 4g/L in unit, sludge volume index (SVI, it is possible to be referred to as dirt
Mud settling ratio) it is 100ml/g；The iron sulfate and the carbon of dissolving dissolved is added to homogeneous unit
Acid hydrogen sodium, in homogeneous unit, pH remains 6.0～8.5；Add after sodium nitrate solid is dissolved
Homogeneous unit, make homogenizing pond flow to the concentration of nitrate nitrogen in the waste water of oxygen compatibility pool be about 400～
600mg/L, in homogeneous unit structures the ratio of COD concentration and the concentration of nitrate nitrogen be about 2～
3.7；Treat that homogenizing water waste water flows into oxygen compatibility pool and causes Aeration tank mud mixture to flow into precipitation list
Unit after covering sludge reflux tube inlet, opens sludge reflux；Adjust Air supply facility and make aerobic list
Unit's outlet dissolved oxygen concentration reaches 2～7mg/L；Start continuum micromeehanics 10L/d to run, monitoring
Precipitation unit water outlet, determines after 7 days that its COD concentration reaches below 128mg/L, ammonia nitrogen concentration
Reaching below 18mg/L, detection ferrum element addition is residual for always not may filter that in now biochemistry pool
The 9% of slag, now monitoring Aeration tank mud amasss index (SVI) is 90ml/g；Improve water inlet
Measuring to about 30L/d, the waste strength i.e. entering homogenizing pond increases to original 3 with flow product
Times, improve sodium nitrate addition is 3 times on last stage simultaneously, in making homogeneous unit structures
COD concentration keeps being about 2～3.7 with the ratio of the concentration of nitrate nitrogen；Continue monitoring precipitation unit to go out
Water, determines after 14 days that its COD concentration reaches below 128mg/L, and ammonia nitrogen concentration reaches 18mg/L
Hereinafter, raising inflow, to desired value about 90L/d, stops the addition of sodium nitrate after 3 days；Continue
Continuous monitoring precipitation unit water outlet, determines after 14 days that its COD concentration reaches below 80mg/L, ammonia
Nitrogen concentration reaches below 15mg/L, maintains water outlet up to standard to run continuously 2 weeks, total in biochemistry pool
Filtration residue amount can not be about 4.5g/L, sludge volume index (SVI) is 100ml/g, opens
Dynamic end, time-consuming 7 weeks.
Embodiment 5
Technical solution of the present invention discharges waste water about 10L/d and city for gas treatment gasifying device
Sewage about 100L/d, coal gasification apparatus is discharged waste water COD and is about 1000mg/L, ammonia nitrogen about
700mg/L, municipal sewage COD are about 300mg/L, and ammonia nitrogen is about 30mg/L；Oxygen compatibility pool and
Aeration tank total measurement (volume) is 60L；2 strands of waste water are mixed into anoxic unit waste water COD in homogenizing pond
It is 300～400mg/L, NH3-N is 60～120mg/L, and B/C is 0.6～0.9；Water outlet is wanted
Ask COD≤60mg/L, NH3-N≤15mg/L；Planting mud is municipal sewage plant digester mud；
Improve and enter the wastewater flow of homogenizing pond structures or increase the waste water entering homogenizing pond structures
The opportunity of kind is that precipitation unit effluent COD concentration reaches below 108mg/L, ammonia nitrogen concentration reaches
To below 18mg/L.
Start-up course is as follows:
First introduce each stock waste water in the treating capacity ratio of each stock waste water to homogeneous unit so that it is COD,
Ammonia nitrogen concentration, pH value reach target inflow requirement；Add municipal wastewater to biochemical unit to process
Factory's digester mud, to the 17% of biochemical unit dischargeable capacity, adds municipal sewage to effectively holding
Long-pending 100%；Open anoxic unit stirring facility and aerobic unit Air supply facility makes mud and gives up
Water mix homogeneously, opens mixed-liquor return, now always can not mistake in anoxic unit and aerobic unit
Filter level of residue is 1g/L, and sludge volume index (SVI, also referred to as sludge settling ratio) is 100ml/g；
Add the iron chloride and the sodium hydroxide of dissolving dissolved to homogeneous unit, in homogeneous unit, pH protects
Hold is 7.0～8.5；Add homogeneous unit after being dissolved by sodium nitrite solid, make homogenizing pond flow
Being about 200～250mg/L to waste water Central Asia the concentration of nitrate nitrogen of oxygen compatibility pool, homogeneous unit is constructed
In thing, COD concentration is about 1.5～1.8 with the ratio of cultured water concentration；Treat that homogenizing water gives up
Water flows into oxygen compatibility pool and causes Aeration tank mud mixture to flow into precipitation unit, opens sludge reflux；
Adjusting Air supply facility makes Aeration tank outlet dissolved oxygen concentration reach 2～7mg/L；Start to enter continuously
Water 30L/d runs, and monitors precipitation unit water outlet, determines that its COD concentration reaches after 7 days
Below 108mg/L, ammonia nitrogen concentration reaches below 18mg/L, and detection ferrum element addition is this
Time biochemistry pool in always can not filtration residue 31%, now monitoring Aeration tank mud amass index (SVI)
For 60ml/g；Raising inflow, to about 60L/d, i.e. enters waste strength and the stream in homogenizing pond
Amount product increases to original 2 times, maintains sodium nitrite addition constant, makes homogeneous unit structure
Build the ratio of COD concentration and cultured water concentration in thing and be about 3～3.6；Continue monitoring precipitation
Unit water outlet, determines after 10 days that its COD concentration reaches below 108mg/L, and ammonia nitrogen concentration reaches
To below 18mg/L, raising inflow, to desired value about 110L/d, stops sodium nitrite simultaneously
Addition；Continue monitoring precipitation unit water outlet, after 11 days, determine that its COD concentration reaches 60mg/L
Hereinafter, ammonia nitrogen concentration reaches below 15mg/L, maintains water outlet up to standard to run continuously 2 weeks, raw
Always filtration residue amount can not be about 4.5g/L in changing pond, sludge volume index (SVI) is 80
Ml/g, startup terminates, time-consuming 5 weeks.
The content not being described in detail in this specification belongs to known in professional and technical personnel in the field
Prior art.
Claims (11)
1. a method for quick startup denitrification-nitrification biochemical treatment system, described denitrification-nitrification is biochemical
Processing system contains the waste water of high-enriched organics and ammonia nitrogen in high density for processing simultaneously, and this system includes:
Homogeneous unit, anoxic unit, aerobic unit and precipitation unit, anoxic unit and aerobic unit are referred to as biochemistry
Unit, it is characterised in that:
By oxidizing substance needed for increase denitrification in homogeneous unit or anoxic unit, tame anti-in advance
Nitrobacteria,
Change by adding iron compound to the outlet of homogeneous unit or anoxic unit or aerobic unit or aerobic unit
Sludge settling property in kind precipitation unit,
By add alkaline matter eliminate beyond dehydrogenation ferrum oxide in added iron compound iron ion to denitrification and
The suppression of nitration reaction；
Concretely comprise the following steps:
Step 1, waste water introduces homogeneous unit: when having multiply to intake, can introduce multiply in proportion and enter during startup
Water, or first introduce easy biochemical waste water and introduce according still further to the method in step 8 that concentration is higher, biochemical successively
Worse waste water；
Step 2, adds in anoxic unit and/or aerobic unit used by denitrification-nitrification biochemical treatment system and plants
Mud, adds the water in clear water or homogeneous unit in anoxic unit and aerobic unit, opens aerobic unit oxygen supply
Facility and anoxic unit stirring facility, make mud and water or waste water mix homogeneously in anoxic unit and aerobic unit,
Always 1～6g/L can not be reached by filtration residue in making pond；
Step 3, opens mixed-liquor return；
Step 4, disposably adds to the outlet of homogeneous unit or anoxic unit or aerobic unit or aerobic unit and contains
Hydrated ferric oxide. or ferrous sulfate or iron sulfate or iron chloride or the suspension containing the arbitrary above-mentioned substance of proportioning or liquid
Body or solid, the addition of ferrum element be add after ferrum element in biochemical unit always can not filtration residue amount 1～
31%；
Step 5, adds the material containing high-valence state nitrogen to homogeneous unit, and in making homogeneous unit structures, COD is dense
Degree is 1～6 with the ratio of high-valence state nitrogen total concentration；
Stopping to the opportunity of the material that homogeneous unit addition contains high-valence state nitrogen is: in step 8 implementation process, treat
In aerobic unit ammonia nitrogen concentration reduce or in aerobic unit the concentration of nitrate nitrogen higher than nitrate nitrogen and Asia in homogeneous unit
During nitrate nitrogen total concentration, or mud and muddy water mixed solution backflow itself may result in COD in homogeneous unit structures
When the ratio of concentration and high-valence state nitrogen total concentration is 1～6, or in homogeneous unit, cultured water concentration is higher than COD
During concentration, stop or reducing the material added containing high-valence state nitrogen；
Step 6, the water outlet of homogeneous unit introduces anoxic unit and controls flow, the muddy water mixed solution of anoxic unit
Flow into aerobic unit, after the muddy water mixed solution of aerobic unit flows into precipitation unit extremely covering sludge reflux tube inlet,
I.e. open sludge reflux；
Step 7, adjusts Air supply facility and makes aerobic unit outlet dissolved oxygen concentration reach 2～7mg/L；
Step 8, continuum micromeehanics continuous effluent is run, and monitors precipitation unit water outlet, treats that its COD index reaches
Water outlet requires within 160% and within ammonia nitrogen index reaches water outlet requirement 120%, increases and enters homogeneous unit
It is original that kind of waste water or improve introduces the flow of waste water of homogeneous unit and concentration to the product of flow and concentration
1.2～3 times of value, tame the mud of anoxic unit and aerobic unit；
Operation adjusts biochemical unit pH in the range of 6～9 with alkaline matter；
Adjusting Air supply facility in operation keeps aerobic unit outlet dissolved oxygen concentration to reach 2～7mg/L；
Step 9, the concentration of the waste water of entrance homogeneous unit and flow and kind reach target zone, precipitation unit
Water outlet reaches target call in continuous more than 2 weeks, and sludge concentration is able to maintain that at more than 1.5g/L, starts knot
Bundle.
2. the method quickly starting denitrification-nitrification biochemical treatment system as claimed in claim 1, its feature
It is: needed for described denitrification, oxidizing substance is: containing the material of high-valence state nitrogen.
3. the method quickly starting denitrification-nitrification biochemical treatment system as claimed in claim 2, its feature
It is: the described material containing high-valence state nitrogen is containing nitrate anion or the material of nitrite anions.
4. the method quickly starting denitrification-nitrification biochemical treatment system as claimed in claim 3, its feature
It is: the described material containing nitrate anion or nitrite anions is containing nitrate anion and/or the solid of nitrite anions or liquid.
5. the method quickly starting denitrification-nitrification biochemical treatment system as claimed in claim 1, its feature
It is: when material beyond the iron compound added is containing hydrated ferric oxide., keep biochemistry by adding alkaline matter
Unit pH value is in the range of 6～9.
6. the method quickly starting denitrification-nitrification biochemical treatment system as claimed in claim 5, its feature
It is: described alkaline matter includes but not limited to: sodium carbonate liquor or sodium hydroxide solution or sodium bicarbonate are molten
Liquid or the solution containing the arbitrary above-mentioned alkaline matter of proportioning.
7. the method quickly starting denitrification-nitrification biochemical treatment system as claimed in claim 1, its feature
It is: during denitrification-nitrification biochemical treatment system starts, waste water is gradually added homogenizing by control order and flow
Unit, at the end of denitrification-nitrification biochemical treatment system starts, enters the water quality of the homogenizing waste water of anoxic unit
It is characterized as:
Ammonia nitrogen concentration is 60～330mg/L,
COD concentration is 300～1500mg/L,
PH value between 6～9,
Homogenizing waste water has biodegradability, and biodegradability BOD represents with COD ratio, BOD and COD
Ratio >=0.3.
8. the method quickly starting denitrification-nitrification biochemical treatment system as claimed in claim 7, its feature
It is:
Denitrification-nitrification biochemical treatment system is directed to biochemical unit and adds kind of a mud during starting, little by little increase
Enter the waste strength of biochemical unit or flow or kind, kind of mud is cultivated and tamed, until it is complete
Adapt to target waste strength and flow；
Denitrification-nitrification biochemical treatment system start end refer to kind of mud can adapt to completely target waste strength and
Kind and flow, index be enter the waste strength of homogeneous unit, flow and kind in target zone and
Denitrification-nitrification biochemical treatment system water outlet runs more than 2 weeks in the case of reaching target call continuously, and mud
Concentration is able to maintain that at more than 1.5g/L.
9. the method quickly starting denitrification-nitrification biochemical treatment system as claimed in claim 1, its feature
It is: during startup, add clear water or other low concentration drainings to homogeneous unit or anoxic unit or aerobic unit,
Reduce biochemical unit initial COD concentration to 2 times of its precipitation unit water outlet desired value to 4 times, reduction ammonia nitrogen
Concentration is to 2 times of its precipitation unit water outlet desired value to 4 times.
10. the method quickly starting denitrification-nitrification biochemical treatment system as claimed in claim 1, it is special
Levy and be: in order to eliminate iron ion to denitrification and the suppression of nitration reaction, except the iron compound added is hydrogen
Beyond the situation of ferrum oxide, being also added with alkaline matter with the interpolation of iron compound, addition method is simultaneously:
When adding iron compound to homogeneous unit, regulate to biochemistry by adding alkaline matter to homogeneous unit
Unit water inlet pH value extremely >=6.0,
When adding iron compound to the outlet of anoxic unit or aerobic unit or aerobic unit, by single to this
Unit or homogeneous unit add alkaline matter and keep biochemical unit pH value >=6.0.
11. methods quickly starting denitrification-nitrification biochemical treatment system as claimed in claim 1, its feature
It is: denitrification-nitrification biochemical treatment system mud of planting used is at municipal sewage plant mud, industrial wastewater
Reason factory mud, anaerobic reactor discharge in mud one of arbitrarily or two kinds and the arbitrary above-mentioned dirt of above proportioning
The mixture of mud.
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