CN109250814A - A kind of complex enzyme/activated sludge and its method for sewage treatment - Google Patents
A kind of complex enzyme/activated sludge and its method for sewage treatment Download PDFInfo
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Abstract
The invention discloses a kind of complex enzyme/activated sludge and its for the method for sewage treatment, by black foul sewage mud, wet nitrifying activated sludge and specific nutrient solution, specifically domestication process obtains complex enzyme/activated sludge of the present invention through the invention, it is short that it tames the time, NH_3-N treating effect is good, it is not only that black foul sewage mud has found utilization ways, while solving the problems such as sewage plant activated sludge obtains trouble.Complex enzyme/activated sludge of the present invention has quick degradation effect in sewage disposal process, optimal ammonia nitrogen degradation effect can be brought for one week by running, sewage treatment system can be made to rapidly enter optimal stable degradation state, and the cycle of operation in later period still has stable ammonia nitrogen degradation effect.
Description
Technical field
The invention belongs to governing pollution of river surge fields, and in particular to a kind of complex enzyme/activated sludge and its for sewage treatment
Method.
Background technique
At this stage, with the continuous social and economic development, the raising of people's quality of life, city environmental pollution are further tight
Weight, South China's creek complex distribution, water capacity is smaller, water body flow is poor, and a large amount of discharges of sewage cause creek water quality to be disliked
Change, especially polluter concentration is deposited on bed mud, causes water body environment to change, long-term anaerobic environment causes bed mud to be sent out
Dark hair is smelly, becomes black foul sewage mud.Black foul sewage mud is normally referred to as the bottom sludge of black-odor riverway, and color is black, has penetrating odor,
Black foul sewage mud deposits the polluter of black-odor riverway due to long-time, and sediment pollution substance content is to cover water content thereon
1000-1000 times, polluter includes: excessive organic matter, N, P, and the heavy metals such as Mn, Fe, Ni, content is according to river polluted feelings
Condition determines that black foul sewage mud is in extreme anaerobic environment, and general DO is lower than 0.1mg/L, and ORP is lower than -300mV.Black foul sewage mud pole
Big affects people's lives environment, also increases the difficulty of governance of black-odor river.At this stage for the processing of black smelly bed mud
Thinking is more single, and most practical way is to be dehydrated landfill, and recycling treatment is difficult to realize.
Activated sludge is mostly used for sewage treatment plant and integration apparatus, and the activity for being generally used sewage plant secondary settling tank is dirty
The problems such as mud is tamed, and is obtained and is bothered there are high-quality activated sludge, and amount to obtain is few.At this stage, with black smelly culturing sludge activity
The domestic and international correlative study of sludge is very few, is not only badly in need of a kind of utilization method for making black foul sewage mud turn waste into wealth, also needs as at sewage
Reason provides more efficient activated sludge and processing method.
Summary of the invention
The present invention provides a kind of complex enzyme/activated sludge and its method for sewage treatment, and incubation time is short (5 days), ammonia
Nitrogen high treating effect, only not black foul sewage mud have found utilization ways, while solving sewage plant activated sludge and obtaining trouble etc.
Problem.
The purpose of the present invention is to provide a kind of complex enzyme/activated sludge and its for the method for sewage treatment.
The technical solution used in the present invention is:
A kind of acclimation method of complex enzyme/activated sludge, comprising the following steps:
1) black foul sewage mud is mixed with initial stage nutrient solution by the volume ratio of 1:2.5~3.5, bored exposure, dissolved oxygen DO control 2~
6mg/L；Contain 90~110mg/L COD, 4.5~5.5mg/L ammonia nitrogen, the total P of 0.8~1.2mg/L in the initial stage nutrient solution；
2) it is stood after 2~4h of bored exposure, supernatant and the impurity of floating is removed, the initial stage nutrient solution of equivalent is added；It repeats
After this operation 1~2 time, supernatant is excluded, pretreated black foul sewage mud is obtained；Pretreated black foul sewage mud and nitrification activity is dirty
Mud is that the ratio of 6~8:2~4 is mixed evenly by volume, obtains composite sludge；
3) composite sludge being mixed with initial stage nutrient solution by the volume ratio of 1:2.5~3.5, bored exposure, control pH is 7~8.5,
25~30 DEG C of temperature, DO 2~6mg/L, every 23~25h are a cycle, wherein stratification is arranged after 22.5~23.5h of aeration
Supernatant and add initial stage nutrient solution out；
4) it is more than the period that 2 are run, stratification exhausts the sludge of bottom 30%~40%；The new of equivalent is refilled simultaneously
Nutrient solution, ammonia-nitrogen content is higher than 5mg/L in new nutrient solution, but is no more than 25mg/L, and COD and total P content still divide in new nutrient solution
It Wei not 90~110mg/L, 0.8~1.2mg/L；
5) above-mentioned system being continued into bored exposure, every 23~25h is a cycle, control 2~6mg/L of DO, pH 7~
8.5, temperature controls between 25~30 DEG C, wherein stratification after 22.5~23.5h of aeration, discharge supernatant add nutrient solution；
Daily observation MLSS, when MLSS rises to 10000mg/L or more, and the degradation rate of each all end of term ammonia nitrogens is stable in 99%
After above, then the higher new nutrient solution of ammonia-nitrogen content is added, ammonia-nitrogen content is made to be higher than 25mg/L, but be no more than 40mg/L, COD and
Total P content still remains unchanged；
6) system of the higher new nutrition of above-mentioned addition ammonia-nitrogen content is further continued for carrying out bored exposure, every 23~25h is one
Period controls 2~6mg/L of DO, pH 7~8.5, and temperature controls between 25~30 DEG C, wherein quiet after 22.5~23.5h of aeration
It sets layering discharge supernatant and adds new nutrient solution, ammonia-nitrogen content is higher than 40mg/L in new nutrient solution, but is no more than 70mg/L, keeps
COD and total P content are still respectively 90~110mg/L, 0.8~1.2mg/L；
7) above-mentioned system is subjected to intermittent aeration, 11~13h is a period, and wherein aeration time is not less than 8h, week
End of term stratification, supernatant is discharged, and gained lower layer sludge is activated sludge.
Further, the black foul sewage mud chooses the meta position in black-odor river bed mud with a distance from mud bed upper surface 1/4~1/2
The black foul sewage mud set.
Further, the black foul sewage mud silt content is lower than 20%, and the content of organic matter is more than 10%.
Further, the initial stage nutrient solution is formulated by glucose, ammonium chloride, potassium dihydrogen phosphate and water.
Further, nitrifying activated sludge described in step 2) is to nitrify wet activated sludge, and moisture content is 70% or more.
Further, the time stood in step 2) is 25~45min.
Further, in step 4), after operation 2 weeks or more, there is thick, mud colour cast brown color in sludge.
Further, in step 4), the time of standing is 45~65min.
Further, in step 4), after the sludge for exhausting bottom 30%~40%, the SV30 of remaining system is not less than
10%.
Further, in step 4), the ammonia-nitrogen content of adding in nutrient solution is higher than 5mg/L, but is no more than 25mg/L,
COD and total P content are still respectively 90~110mg/L, 0.8~1.2mg/L.
Further, in step 7), stop needing to be stirred during aeration, mix muddy water.
Further, in step 7), the activated sludge of acquisition is added into new nutrient solution, ammonia-nitrogen content is super in new nutrient solution
70mg/L is crossed, COD and total P content are still respectively 90~110mg/L, 0.8~1.2mg/L；The interval in 1~3 period is carried out again
Supernatant is discharged for formula aeration, all end of term stratification, and gained lower layer sludge is activated sludge.
Further, in step 7), 2~6mg/L of DO, pH 7~8.5, temperature control are controlled during intermittent aeration
Between 25~30 DEG C.
A kind of method of sewage treatment, comprising the following steps:
Above-mentioned complex enzyme/activated sludge is mixed with treatment sewage by the volume ratio of 1:1~5, continuous aeration disturbance is carried out,
4~5mg/L of dissolved oxygen, pH 6.5~8.5 are controlled simultaneously；In 2nd~5 period of sewage treatment, each periodic duty time is
23~25h；Wherein stratification discharge supernatant after aeration 22~for 24 hours, add new sewage and complete a cycle；When sewage treatment extremely
6th it is more than the period when, each cycle runing time be 11~13h, wherein aeration 8~9h after stratification discharge supernatant, add
New sewage completes a cycle；Or the complex enzyme/activated sludge and treatment sewage for preparing any of the above-described the method are by 1:
2~5 volume ratio mixing, carries out bored exposure processing；Each periodic duty time is 23~25h；Wherein it is bored expose 22~stand afterwards for 24 hours
Layering discharge supernatant adds new sewage, completes a cycle；Carry out the operation of next cycle.
Further, dissolved oxygen content 4-5mg/L is made in aeration process.
The beneficial effects of the present invention are:
Complex enzyme/activated sludge of the present invention and the method for sewage treatment have good degradation effect, actual treatment effect to ammonia nitrogen
Fruit is obvious.
Complex enzyme/activated sludge of the present invention has quick degradation effect in sewage disposal process, and operation can be brought for one week
Optimal ammonia nitrogen degradation effect can make sewage treatment system rapidly enter optimal stable degradation state, and the fortune in later period
The row period still has stable ammonia nitrogen degradation effect.
Specific embodiment
The present invention is further illustrated combined with specific embodiments below.
A kind of acclimation method of the complex enzyme/activated sludge of embodiment 1
1) selection of black foul sewage mud
Black foul sewage mud is normally referred to as the bottom sludge of black-odor riverway, and color is black, have penetrating odor, black foul sewage mud due to
The polluter of black-odor riverway is deposited for a long time, and sediment pollution substance content is 1000-1000 times for covering water content thereon, pollution
Substance includes: the heavy metals such as excessive organic matter, N, P, Mn, Fe, Ni, and content is determined according to river polluted situation, black foul sewage
Mud is in extreme anaerobic environment, and general DO is lower than 0.1mg/L, and ORP is lower than -300mV.
It chooses in black-odor river that silt content is lower, the higher black smelly bed mud of the content of organic matter, preferably selects in black-odor river mud bed
Portion and in position on the upper side black foul sewage mud, i.e., with a distance from mud bed upper surface 1/4-1/2 between position black foul sewage mud, silt content
Usually less than 20%, the content of organic matter is more than 10%.
2) configuration of nutrient solution
Nutriment of activated sludge during domestication selects glucose, ammonium chloride, potassium dihydrogen phosphate to configure nutrient solution, domestication
Initial stage configuration COD, ammonia nitrogen, total P concentration are respectively the initial stage nutrient solution of 100mg/L, 5mg/L, 1mg/L；During subsequent domestication,
Ammonia nitrogen loading is gradually increased, the ammonia-nitrogen content in nutrient solution is made gradually to increase to 120mg/L, (ammonia-nitrogen content can be according to concrete application
Demand determines that the present embodiment selects 120mg/L).
3) black foul sewage mud pre-processing
3.1 by black foul sewage mud in 1) with 2) in initial stage nutrient solution mix by the volume ratio of 1:3, carried out with aeration pump bored
It exposes, dissolved oxygen DO is controlled in 2~6mg/L；
30min is stood after 3.2 2~4h of bored exposure, supernatant and the impurity of floating are removed, returns the initial stage nutrition for adding equivalent
Liquid；
3.3 repeat 3.2 operation 1~2 time；Supernatant and the impurity of floating are removed, pretreated black foul sewage mud is obtained.
4) it is inoculated with
By volume by the wet activated sludge of nitrification (moisture content is 70% or more) of pretreated black foul sewage mud and nitrification tank
It is mixed evenly for the ratio of 6~8:2~4, obtains composite sludge.
5) activated sludge culture
Above-mentioned composite sludge and initial stage nutrient solution were mixed in the ratio of 1:3 in 5.1 first days, control pH (matches for 7~8.5
Close adding sodium hydroxide and sodium bicarbonate be used together), temperature controls between 25~30 DEG C, 2~6mg/L of DO, and every be one for 24 hours
Period carries out bored exposure for 24 hours, wherein stratification arranges supernatant and adds equivalent initial stage nutrient solution 1h after aeration 23h, in aeration process
Guarantee that muddy water is sufficiently mixed；
In 5.2 the 2nd~3 periods of operation, sludge appearance is thick, and mud colour cast brown color, stratification, exhausts bottom about at this time
The bed mud of 30%-40%, the system after spoil disposal need to guarantee SV30 not less than 10%；The new nutrient solution of equivalent is refilled simultaneously, it is new to seek
Ammonia-nitrogen content keeps COD and total P to contain higher than 5mg/L but no more than 25mg/L (selecting ammonia-nitrogen content for 20mg/l) in nutrient solution
Amount is still 100mg/L, 1mg/L；
Above-mentioned system is continued bored exposure by 5.3, is for 24 hours a cycle, controls 2~6mg/L of DO, pH 7~8.5, temperature
Degree control is between 25~30 DEG C, wherein aeration 23h, stratification row's supernatant water and equivalent nutrient solution 1h, observe MLSS daily,
When MLSS rises to 10000mg/L or more (MLSS rises to 10000mg/L or more after a week for operation), there is protist in microscopy
(such as campanularian, few caterpillar), and the degradation rate of each all end of term ammonia nitrogens is stable in 99% or more and (runs ammonia nitrogen after a week afterwards
Drop to 0.1mg/l or less), improve the new content that ammonia nitrogen in nutrient solution is added, make ammonia-nitrogen content be higher than 25mg/L but no more than
40mg/L (selects ammonia-nitrogen content for 30mg/l), and COD and total P content still remain unchanged, and if system effect is unstable, need to keep phase
Same condition of culture improves the content of ammonia nitrogen again after stablizing；
5.4 are further continued for above-mentioned system to carry out bored exposure, are for 24 hours a cycle, control 2~6mg/L of DO, pH 7~8.5,
Temperature controls between 25~30 DEG C, wherein aeration 23h, stratification row's supernatant water and equivalent nutrient solution 1h；It is new to refill equivalent
Nutrient solution, ammonia-nitrogen content is higher than 40mg/L but no more than 70mg/L (select ammonia-nitrogen content for 50mg/l), guarantor in new nutrient solution
Holding COD and total P content is still 100mg/L, 1mg/L；
Above-mentioned system is carried out intermittent aeration by 5.5, and 12h is a period, and wherein aeration time is not less than 8h, stops exposing
The gas phase needs turn on agitator, equally guarantees that muddy water is sufficiently mixed, and supernatant is discharged all end of term stratification, and gained lower layer is dirty
Mud is complex enzyme/activated sludge；Or new nutrient solution is refilled again, ammonia-nitrogen content is higher than 70mg/L (nutrient solution at this time in new nutrient solution
Middle ammonia nitrogen value content can determine according to practice demand, and it is 120mg/L, COD and total P content that the present embodiment, which selects ammonia-nitrogen content,
It is constant), then the intermittent aeration in 1~3 period is carried out, it is static later, supernatant is discharged, gained lower layer sludge is also compound
Activated sludge.
2~6mg/L of DO, pH 7~8.5 are controlled during above-mentioned intermittent aeration, temperature controls between 25~30 DEG C.
According to above training method, the sticky situation of sludge is occurred as soon as on day 3, illustrates that microorganism growing way is preferable, ammonia
Nitrogen load can increase daily, and ammonia-nitrogen content 20mg/l on the 3rd or so drops to 0.1mg/l or less afterwards for 24 hours；Ammonia nitrogen on the 4th
30mg/l or so drops to 0.1mg/l or less for 24 hours；Ammonia nitrogen 50mg/l on the 5th or so drops to 0.1mg/l for 24 hours hereinafter, from culture
It can be completed within 5 days or so to maturation, shorten the time for directly taming black foul sewage mud.
A kind of acclimation method of the complex enzyme/activated sludge of embodiment 2
A kind of acclimation method of complex enzyme/activated sludge, comprising the following steps:
1) black foul sewage mud is mixed with initial stage nutrient solution by the volume ratio of 1:3.5, bored exposure, and dissolved oxygen DO is controlled in 6mg/L；Institute
It states and contains 110mg/L COD, 5.5mg/L ammonia nitrogen, the total P of 1.2mg/L in initial stage nutrient solution；
The black foul sewage mud chooses in black-odor river bed mud the black smelly of position between with a distance from mud bed upper surface 1/4~1/2
Sludge；The black foul sewage mud silt content is lower than 20%, and the content of organic matter is more than 10%.
2) 25~45min is stood after bored exposure 4h, and supernatant and the impurity of floating are removed, the initial stage nutrition of equivalent is added
Liquid；After repeating this operation 1~2 time, supernatant is excluded, pretreated black foul sewage mud is obtained；By pretreated black foul sewage mud and nitre
Dampness elimination activated sludge (its moisture content is 80%) is mixed evenly by volume for the ratio of 2:1, obtains composite sludge；
The initial stage nutrient solution is formulated by glucose, ammonium chloride, potassium dihydrogen phosphate and water.
3) composite sludge is mixed with initial stage nutrient solution by the volume ratio of 1:3.5, bored exposure, control pH is 8.5, temperature 30
DEG C, DO 6mg/L, every 23~25h are a cycle, wherein stratification is discharged supernatant and adds just after 22.5~23.5h of aeration
Phase nutrient solution；
4) running 2, more than the period there is thick, mud colour cast brown color in sludge, stands 45~65min layering, exhausts
The sludge of bottom 40%, the SV30 for being left system are not less than 10%；The new nutrient solution of equivalent, ammonia nitrogen in new nutrient solution are refilled simultaneously
Content is higher than 5mg/L, but is no more than 25mg/L, and COD and total P content are still respectively 110mg/L, 1.2mg/L in new nutrient solution；
5) above-mentioned system is continued into bored exposure, every 23~25h is a cycle, controls DO 6mg/L, pH8.5, temperature
Control is between 30 DEG C, wherein stratification after 22.5~23.5h of aeration, discharge supernatant add nutrient solution；Daily observation
MLSS, after MLSS rises to 10000mg/L or more, and the degradation rate of each all end of term ammonia nitrogens is stable in 99% or more,
The higher new nutrient solution of ammonia-nitrogen content is then added, so that ammonia-nitrogen content is higher than 25mg/L, but be no more than 40mg/L, COD and total P content
Still remain unchanged；
6) system of the higher new nutrition of above-mentioned addition ammonia-nitrogen content is further continued for carrying out bored exposure, every 23~25h is one
Period controls DO6mg/L, pH 8.5, and temperature controls between 30 DEG C, wherein stratification is discharged after 22.5~23.5h of aeration
Supernatant and new nutrient solution is added, ammonia-nitrogen content is higher than 40mg/L in new nutrient solution, but is no more than 70mg/L, and COD and total P is kept to contain
Amount is still respectively 110mg/L, 1.2mg/L；
7) above-mentioned system is subjected to intermittent aeration, 11~13h is a period, and wherein aeration time is not less than 8h, stops
It needs to be stirred during being only aerated, mixes muddy water, supernatant is discharged all end of term stratification, and gained lower layer sludge is
Activated sludge；
The activated sludge of acquisition is added into new nutrient solution, ammonia-nitrogen content is more than 200mg/L, COD and total P in new nutrient solution
Content is still respectively 110mg/L, 1.2mg/L；The intermittent aeration in 1~3 period is carried out again, and all end of term stratification will be upper
Clear liquid discharge, gained lower layer sludge are activated sludge；
DO 6mg/L, 8.5 pH are controlled during intermittent aeration, temperature controls between 30 DEG C.
A kind of processing method of the sewage of embodiment 3
Prepare artificial sewage: configuration artificial sewage makes COD 200mg/L in sewage, total phosphorus content 1mg/L, ammonia-nitrogen content
38.37mg/L。
By complex enzyme/activated sludge prepared by embodiment 1,1:3 is mixed by volume with the sewage of preparation, directly carries out bored exposure；
Each periodic duty time is for 24 hours, wherein bored exposure 23h, stratification add new sewage 1h, then to carry out next cycle.Often
After periodic duty, water body ammonia-nitrogen content, COD content are detected.
A kind of processing method of the sewage of embodiment 4
Prepare artificial sewage: configuration artificial sewage makes COD 200mg/L in sewage, total phosphorus content 1mg/L, ammonia-nitrogen content
38.37mg/L。
By complex enzyme/activated sludge prepared by embodiment 1,1:3 is mixed by volume with the sewage of preparation, is connected with aeration pump
Continuous aeration disturbance (muddy water is sufficiently mixed in operational process) monitors reaction condition in real time, main to control dissolved oxygen control in 2mg/L
More than, pH 6.5~8.5.Wherein in the 1-5 period, each periodic duty time is for 24 hours；Wherein (dissolved oxygen maintains aeration 23h
4-5mg/l, and guarantee that muddy water is uniformly mixed), stratification discharge supernatant adds new sewage 1h.In the 6-8 period, each cycle
Runing time is 12h, wherein 8h (dissolved oxygen maintains 4-5mg/l, and guarantees that muddy water is uniformly mixed) is aerated, in stratification discharge
Clearly, new sewage is added again.After each cycle end of run, water body ammonia-nitrogen content, COD content, testing result such as table 1 are detected.
Comparative example 1
In addition to being added without activated sludge, other operations are the same as embodiment 3.
Comparative example 2
Complex enzyme/activated sludge of the invention is substituted with the wet activated sludge of the nitrification of equivalent (70% or more moisture content), other behaviour
Make with embodiment 3.
1 each group of table tests the detection to ammonia nitrogen in sewage degradation capability
The testing result of the various embodiments described above and comparative example is as shown in table 1, there it can be seen that composite reactive of the present invention is dirty
Mud and the method for sewage treatment have good degradation effect to ammonia nitrogen, and degradation rate can be realized after a week and reach for system operation
99.9% or more (ammonia-nitrogen content < 0.1mg/L), is significantly better than comparative example 1 and comparative example 2, and actual processing effect of the present invention is significant,
Illustrate that complex enzyme/activated sludge of the present invention has quick degradation effect in sewage disposal process, operation can bring best for one week
Ammonia nitrogen degradation effect, sewage treatment system can be made to rapidly enter optimal stable degradation state, and the operation week in later period
Phase still has stable ammonia nitrogen degradation effect.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present invention,
It should be equivalent substitute mode, be included within the scope of the present invention.
Claims (10)
1. a kind of acclimation method of complex enzyme/activated sludge, which comprises the following steps:
1) black foul sewage mud is mixed with initial stage nutrient solution by the volume ratio of 1:2.5~3.5, bored exposure, dissolved oxygen DO control 2~
6mg/L；Contain 90~110mg/L COD, 4.5~5.5mg/L ammonia nitrogen, the total P of 0.8~1.2mg/L in the initial stage nutrient solution；
2) it is stood after 2~4h of bored exposure, supernatant and the impurity of floating is removed, the initial stage nutrient solution of equivalent is added；Repeat this behaviour
After making 1~2 time, supernatant is excluded, pretreated black foul sewage mud is obtained；Pretreated black foul sewage mud is pressed with nitrifying activated sludge
Volume ratio is that the ratio of 6~8:2~4 is mixed evenly, and obtains composite sludge；
3) composite sludge is mixed with initial stage nutrient solution by the volume ratio of 1:2.5~3.5, bored exposure, control pH is 7~8.5, temperature
25~30 DEG C, DO 2~6mg/L, every 23~25h are a cycle, wherein after 22.5~23.5h of aeration in stratification discharge
It is clear and add initial stage nutrient solution；
4) it is more than the period that 2 are run, stratification exhausts the sludge of bottom 30%~40%；The new nutrition of equivalent is refilled simultaneously
Liquid, ammonia-nitrogen content is higher than 5mg/L in new nutrient solution, but is no more than 25mg/L, and COD and total P content are still respectively in new nutrient solution
90~110mg/L, 0.8~1.2mg/L；
5) above-mentioned system is continued into bored exposure, every 23~25h is a cycle, controls 2~6mg/L of DO, pH 7~8.5, temperature
Degree control is between 25~30 DEG C, wherein stratification after 22.5~23.5h of aeration, discharge supernatant add nutrient solution；It is daily to see
MLSS is examined, when MLSS rises to 10000mg/L or more, and the degradation rate of each all end of term ammonia nitrogens is stable in 99% or more
Afterwards, then the higher new nutrient solution of ammonia-nitrogen content is added, so that ammonia-nitrogen content is higher than 25mg/L, but be no more than 40mg/L, COD and total P
Content still remains unchanged；
6) system of the higher new nutrition of above-mentioned addition ammonia-nitrogen content being further continued for carrying out bored exposure, every 23~25h is a cycle,
2~6mg/L of DO, pH 7~8.5 are controlled, temperature controls between 25~30 DEG C, divides wherein standing after 22.5~23.5h of aeration
Layer is discharged supernatant and adds new nutrient solution, and ammonia-nitrogen content is higher than 40mg/L in new nutrient solution, but is no more than 70mg/L, keeps COD
And total P content is still respectively 90~110mg/L, 0.8~1.2mg/L；
7) above-mentioned system is subjected to intermittent aeration, 11~13h is a period, and wherein aeration time is not less than 8h, all end of term
Supernatant is discharged stratification, and gained lower layer sludge is complex enzyme/activated sludge.
2. the method according to claim 1, wherein the black foul sewage mud is chosen in black-odor river bed mud from mud bed
The black foul sewage mud of position between 1/4~1/2 distance of upper surface.
3. the method according to claim 1, wherein nitrifying activated sludge described in step 2) is to nitrify wet activity
Sludge, moisture content is 70% or more.
4. the method according to claim 1, wherein the time stood in step 2) is 25~45min.
5. the method according to claim 1, wherein the time of standing is 45~65min in step 4).
6. the method according to claim 1, wherein in step 4), after the sludge for exhausting bottom 30%~40%,
The SV30 of remaining system is not less than 10%.
7. the method according to claim 1, wherein in the intermittent aeration period, stopping the aeration phase in step 7)
Between need to be stirred, mix muddy water.
8. the method according to claim 1, wherein the activated sludge of acquisition is added Xin Ying in step 7)
Nutrient solution, ammonia-nitrogen content is more than 70mg/L in new nutrient solution, and COD and total P content are still respectively 90~110mg/L, 0.8~1.2mg/
L；The intermittent aeration in 1~3 period is carried out again, and supernatant is discharged all end of term stratification, and gained lower layer sludge is compound
Activated sludge.
9. controlled the method according to claim 1, wherein in step 7), during intermittent aeration DO 2~
6mg/L, pH 7~8.5, temperature control between 25~30 DEG C.
10. a kind of method of sewage treatment, which comprises the following steps:
The complex enzyme/activated sludge of any one of claim 1~9 the method preparation and treatment sewage are pressed to the volume of 1:2~5
Than mixing, continuous aeration disturbance is carried out, while controlling 4~5mg/L of dissolved oxygen, pH 6.5~8.5；The 1st~5 week of sewage treatment
Interim, each periodic duty time is 23~25h；Wherein stratification discharge supernatant after aeration 22~for 24 hours, to add new sewage complete
At a cycle；When sewage treatment to the 6th it is more than the period when, each cycle runing time be 11~13h, wherein aeration 8~9h
Stratification is discharged supernatant, adds new sewage completion a cycle afterwards；
Or by the complex enzyme/activated sludge of any one of claim 1~9 the method preparation and treatment sewage by 1:2~5
Volume ratio mixing, carries out bored exposure processing；Each periodic duty time is 23~25h；Wherein it is bored expose 22~for 24 hours after stratification row
Out supernatant, add new sewage, complete a cycle；Carry out the operation of next cycle.
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