CN106045031B - A kind of municipal sewage plant's effluent synchronizes the apparatus and method of advanced treating secondary water outlet and municipal sewage - Google Patents
A kind of municipal sewage plant's effluent synchronizes the apparatus and method of advanced treating secondary water outlet and municipal sewage Download PDFInfo
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- CN106045031B CN106045031B CN201610539301.0A CN201610539301A CN106045031B CN 106045031 B CN106045031 B CN 106045031B CN 201610539301 A CN201610539301 A CN 201610539301A CN 106045031 B CN106045031 B CN 106045031B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2846—Anaerobic digestion processes using upflow anaerobic sludge blanket [UASB] reactors
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F3/28—Anaerobic digestion processes
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Abstract
A kind of synchronous advanced treating secondary water outlet of municipal sewage plant's effluent and the apparatus and method of municipal sewage belong to sewage treatment field.Municipal sewage and contain NO3 ‑The secondary effluent of municipal sewage plant of-N enters short-cut denitrification reactor simultaneously, using organic matter in municipal sewage by NO3 ‑- N is converted into NO2 ‑- N contains NH4 +- N and NO2 ‑The water outlet of-N the anaerobic ammonia oxidation reactor that enters synchronous with a small amount of municipal sewage carries out denitrogenation, and the NO for generating anaerobic ammonium oxidation process using organic matter a small amount of in municipal sewage3 ‑- N carries out removal in situ, to realize the purpose of synchronous advanced treatment of municipal sewage treatment plant secondary effluent and municipal sewage.Nitric efficiency is low when present invention solution Process for Treating Municipal, is discharged and contains excessive NO3 ‑The problem of-N, and the expense and energy consumption of municipal sewage denitrogenation are reduced, have the advantages that nitrogen removal rate is high, processing water is big, operating cost is low etc.；In addition, the technique occupied area is small, upgrading is simple low with risk.
Description
Technical field
The present invention relates to a kind of techniques of municipal sewage plant's effluent synchronous advanced treating secondary water outlet and municipal sewage
Technology belongs to technical field of biological sewage treatment.
Background technique
Currently, wastewater treatment in China factory owner will use traditional nitration denitrification biological denitrification process, however, due to biology
Denitrification need organic matter provide electron donor, most of sewage treatment plant generally face a problem be raw water organic carbon source not
Foot, C/N cause denitrification effect poor than relatively low, and a large amount of nitrate nitrogen is often contained in water outlet.To solve above-mentioned difficulties, sewage
Secondary effluent is often introduced into denitrification filter pool unit by treatment plant, by way of additional carbon (such as methanol), to strengthen
The denitrification effect of traditional waste water treatment process, to make water outlet reach country-level emission standard A, but this aspect increases dirt
On the other hand cost of water treatment will increase the yield of sewage treatment plant excess sludge.
The Anammox autotrophic denitrification technology found by Dutch Delft university the nineties in last century under anoxic conditions can
By NH4 +- N and NO2 -- N is converted into N2, have many advantages, such as to be not necessarily to aerobic aeration and organic carbon source, nitrogen elimination capacity be high, be so far
Most efficient energy-efficient denitrogenation technology until the present.However the technology is also difficult to be widely applied at present, main bottleneck is stable acquisition
The reaction substrate nitrite nitrogen of Anammox.
Short-cut denitrification refers to NO in denitrification process3 -- N is NO2 --N.This seminar utilizes SBR in previous experiments
Reactor realizes high NO for the first time2 -The short-cut denitrification of-N accumulation, and confirm that its stablizing in During Process of Long-term Operation maintains.
Therefore, for containing excessive NO3 -The secondary effluent of-N can convert NO by short-cut denitrification for it2 -- N, then with contain NH4 +- N waste water mixes (such as municipal sewage), is removed by anaerobic ammonia oxidation process, thus realizing that WWTPs secondary effluent is deep
While spending denitrogenation, municipal sewage is handled, sewage treatment expense is substantially reduced.
Summary of the invention
The invention proposes a kind of dresses of municipal sewage plant's effluent synchronous advanced treating secondary water outlet and municipal sewage
It sets and method, will specifically contain NO3 -The secondary effluent of municipal sewage plant of-N is synchronous with municipal sewage to enter the anti-nitre of short distance
Change reactor, using organic matter in municipal sewage and a certain amount of outer carbon source by NO3 -- N is converted into NO2 -- N contains NH4 +- N and
NO2 -The water outlet of-N is synchronous with a small amount of municipal sewage to be removed into anaerobic ammonia oxidation reactor, and utilizes municipal sewage
The NO that middle organic matter generates anaerobic ammonium oxidation process3 -- N is removed in situ, to realize synchronous advanced treatment of municipal sewage processing
The purpose of factory's secondary effluent and municipal sewage.
The purpose of the present invention is achieved through the following technical solutions:
1. the device of a kind of municipal sewage plant's effluent synchronous advanced treating secondary water outlet and municipal sewage, feature exist
In, including secondary effluent reserve tank 1, outer carbon source reserve tank 2, short-cut denitrification USB reactor 3, municipal sewage reserve tank 4, in
Between water tank 5 and Anammox UASB reactor 6；Short-cut denitrification USB reactor 3 is intake equipped with the first blow-down pipe 3.1, first
The 3.2, second water inlet 3.3 of mouth, the first sample tap 3.4, three phase separator 3.5 and the first water outlet 3.6；Anammox UASB
Reactor 6 be equipped with the second blow-down pipe 6.1, third water inlet 6.2, the second sample tap 6.3, three phase separator 6.4, exhaust outlet 6.5,
Collect neat bag 6.6 and the second water outlet 6.7；
3 first water inlet 3.2 of short-cut denitrification USB reactor passes through the first intake pump 1.1 and 1 phase of secondary effluent reserve tank
Even, pump 2.1 is added by carbon source to be connected with outer carbon source reserve tank 2；3 second water inlet 3.3 of short-cut denitrification USB reactor passes through
Second intake pump 4.1 is connected with municipal sewage reserve tank 4；Intermediate water tank 5 and 3 first water outlet of short-cut denitrification USB reactor
3.6 are connected, and are connected by third intake pump 5.2 with 6 third water inlet 6.2 of Anammox UASB reactor；Municipal sewage storage
Standby case 4 is connected by the 4th intake pump 4.3 with Anammox UASB reactor.
2. a kind of method of municipal sewage plant's effluent synchronous advanced treating secondary water outlet and municipal sewage, feature exist
In, including following procedure:
1) it is inoculated with granular sludge by shortcut denitrification in short-cut denitrification USB reactor, makes mixed liquor sludge concentration after inoculation
MLSS is 4~15g/L；Anaerobic ammonium oxidation granular sludge is inoculated in Anammox UASB reactor, control mixed liquor sludge is dense
Degree MLSS is 8~30g/L；
2) NO will be contained3 -It is anti-that the secondary effluent of municipal sewage plant of-N, outer carbon source and municipal sewage are pumped into short distance simultaneously
USB reactor is nitrified, control hydraulic detention time HRT is 3~20min, and sludge age SRT is 3~15 days；
3) water outlet of intermediate water tank medium or short range denitrification USB reactor Anammox UASB is pumped into municipal sewage to react
Device, water outlet are expelled directly out.
The granular sludge by shortcut denitrification of step 1) inoculation is in NO3 -The accumulation rate of-N denitrification process Nitrite Nitrogen is big
In 70%, sludge volume index SVI is less than 100mL/gMLSS；
COD and NO after the water inlet of step 2) short-cut denitrification USB reactor3 -The mass concentration ratio of-N is 1.0~3.5, water inlet
Middle NO3 -- N and NH4 +The mass concentration ratio 1.5~3.0 of-N；
Step 2) medium or short range denitrification USB reactor is discharged NO3 -When-N concentration is greater than 5mgN/L, hydraulic detention time is improved
HRT or raising carbon source add pump discharge to increase carbon source dosage；
NO in the water inlet of step 3) Anammox UASB reactorX --N(NO2 --N+NO3 -- N) and NH4 +The mass concentration of-N
Than controlling 1.3~1.8；
When the mass percent of denitrification removal total nitrogen is greater than 40% in step 3) Anammox UASB reactor, reduce
4th water inlet flow rate pump improves the first intake pump to reduce the flow that municipal sewage enters Anammox UASB reactor
Flow velocity is to increase the flow that municipal sewage enters short-cut denitrification USB reactor, until the quality percentage of denitrification removal total nitrogen
Than less than 40%.
A kind of municipal sewage plant's effluent provided by the invention synchronizes the dress of advanced treating secondary water outlet and municipal sewage
It sets and method, has the advantage that and feature:
1) compared to traditional complete denitrification to containing NO3 -The secondary effluent of-N is handled, and greatly reduces the consumption of outer carbon source, together
When substantially reduce the yield of sludge；
2) processing realized to municipal sewage is synchronized, aerobic aeration is not necessarily to, reduces the aeration energy consumption of sewage treatment plant
And subsequent processing expense；
3) upgrading is simple, need to only increase short-cut denitrification USB reactor and Anammox by mainstream reactor
UASB reactor, occupied area are small；
4) technique nitrogen removal rate is high, and water outlet total nitrogen can control in 5mg/L hereinafter, and short-cut denitrification and anaerobism ammonia oxygen
It is big to change reaction rate, so that nitrogen load is high, processing water is big；
5) degree of risk is low, dirty by reducing city even if short-cut denitrification effect is poor, or even is converted into complete denitrification
The inflow of water is also able to achieve preferable nitric efficiency.
Detailed description of the invention
Fig. 1 is the device figure of a kind of synchronization of municipal sewage plant's effluent advanced treating secondary water outlet and municipal sewage.
Specific embodiment
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in Figure 1, the device of a kind of municipal sewage plant's effluent synchronous advanced treating secondary water outlet and municipal sewage,
Including secondary effluent reserve tank 1, outer carbon source reserve tank 2, short-cut denitrification USB reactor 3, municipal sewage reserve tank 4, intermediate water
Case 5 and Anammox UASB reactor 6；Short-cut denitrification USB reactor 3 is equipped with the first blow-down pipe 3.1, the first water inlet
3.2, the second water inlet 3.3, the first sample tap 3.4, three phase separator 3.5 and the first water outlet 3.6；Anammox UASB is anti-
Device 6 is answered to be equipped with the second blow-down pipe 6.1, third water inlet 6.2, the second sample tap 6.3, three phase separator 6.4, exhaust outlet 6.5, collection
Neat bag 6.6 and the second water outlet 6.7；
3 first water inlet 3.2 of short-cut denitrification USB reactor passes through the first intake pump 1.1 and 1 phase of secondary effluent reserve tank
Even, pump 2.1 is added by carbon source to be connected with outer carbon source reserve tank 2；3 second water inlet 3.3 of short-cut denitrification USB reactor passes through
Second intake pump 4.1 is connected with municipal sewage reserve tank 4；Intermediate water tank 5 and 3 first water outlet of short-cut denitrification USB reactor
3.6 are connected, and are connected by third intake pump 5.2 with 6 third water inlet 6.2 of Anammox UASB reactor；Municipal sewage storage
Standby case 4 is connected by the 4th intake pump 4.3 with Anammox UASB reactor.
Specific test water in the present embodiment are as follows: synthetic municipal wastewater treatment plant secondary effluent (NO3 -- N=20mg/L) and
Actual cities sewage (COD=140~220mg/L, NH4 +- N=50~70mg/L).Testing organic matter in outer carbon source reserve tank is
Sodium acetate, test short-cut denitrification USB reactor dischargeable capacity are 2.0L, and Anammox UASB reactor dischargeable capacity is
4.0L。
Specific operation process is as follows:
1) inoculation granular sludge by shortcut denitrification is in USB reactor, and the sludge is in NO3 -NO in-N denitrification process2 -- N's
Average accumulation rate is 90%, and sludge volume index SVI is 62mL/gMLSS, USB reactor mixed liquor sludge concentration after inoculation
MLSS is 5.8g/L, and inoculation anaerobic ammonium oxidation granular sludge mixed liquor sludge concentration MLSS after UASB reactor, inoculation is
12.0g/L；
2) secondary effluent of municipal sewage plant, outer carbon source and municipal sewage are pumped into short-cut denitrification USB reaction simultaneously
Device, flow are respectively 20L/h, 1.0g/h and 4L/h, and control short-cut denitrification USB reactor sludge age SRT is 8 days；
3) water outlet of intermediate water tank medium or short range denitrification USB reactor Anammox UASB is pumped into municipal sewage to react
Device, flow are respectively 24L/h and 0.5L/h, and water outlet is expelled directly out.
Long run test the result shows that:
In secondary effluent of municipal sewage plant NO3 -- N concentration is 20mg/L, actual domestic wastewater NH4 +- N concentration is 50
When~70mg/L, stable operation 3 months the result shows that: short-cut denitrification US (2L) combine Anammox UASB (4L) technique
It can handle 480L secondary effluent from sewage treatment plant and the actual cities 108L sewage daily, be discharged NH4 +- N mean concentration is less than
3.0mg/L, NO3 -- N mean concentration is less than 1.0mg/L, and total nitrogen (TN) mean concentration is less than 5.0mg/L, reaches the mesh of advanced nitrogen
's.
Claims (2)
1. the device of a kind of municipal sewage plant's effluent synchronous advanced treating secondary water outlet and municipal sewage, which is characterized in that
Including secondary effluent reserve tank (1), outer carbon source reserve tank (2), short-cut denitrification USB reactor (3), municipal sewage reserve tank
(4), intermediate water tank (5) and Anammox UASB reactor (6)；Short-cut denitrification USB reactor (3) is equipped with the first blow-down pipe
(3.1), the first water inlet (3.2), the second water inlet (3.3), the first sample tap (3.4), three phase separator (3.5) and first go out
The mouth of a river (3.6)；Anammox UASB reactor (6) is equipped with the second blow-down pipe (6.1), third water inlet (6.2), the second sampling
Mouth (6.3), three phase separator (6.4), exhaust outlet (6.5), the neat bag (6.6) of collection and the second water outlet (6.7)；
(3) first water inlet (3.2) of short-cut denitrification USB reactor passes through the first intake pump (1.1) and secondary effluent reserve tank
(1) it is connected, pump (2.1) is added by carbon source and is connected with outer carbon source reserve tank (2)；Short-cut denitrification USB reactor (3) second into
The mouth of a river (3.3) is connected by the second intake pump (4.1) with municipal sewage reserve tank (4)；Intermediate water tank (5) and short-cut denitrification
(3) first water outlet (3.6) of USB reactor is connected, and passes through third intake pump (5.2) and Anammox UASB reactor (6)
Third water inlet (6.2) is connected；Municipal sewage reserve tank (4) is reacted by the 4th intake pump (4.3) with Anammox UASB
Device is connected.
2. carrying out a kind of synchronous advanced treating secondary water outlet of municipal sewage plant's effluent and city using claim 1 described device
The method of city's sewage, which is characterized in that including following procedure:
1) it is inoculated with granular sludge by shortcut denitrification in short-cut denitrification USB reactor, makes mixed liquor sludge concentration MLSS after inoculation
For 4~15g/L；It is inoculated with anaerobic ammonium oxidation granular sludge in Anammox UASB reactor, controls mixed liquor sludge concentration
MLSS is 8~30g/L；
2) NO will be contained3 -The secondary effluent of municipal sewage plant of-N, outer carbon source and municipal sewage are pumped into short-cut denitrification simultaneously
USB reactor, control hydraulic detention time HRT are 3~20min, and sludge age SRT is 3~15 days；
3) water outlet of intermediate water tank medium or short range denitrification USB reactor is pumped into Anammox UASB reactor with municipal sewage,
Water outlet is expelled directly out；
The granular sludge by shortcut denitrification of step 1) inoculation is in NO3 -The accumulation rate of-N denitrification process Nitrite Nitrogen is greater than
70%, sludge volume index SVI are less than 100mL/gMLSS；
COD and NO after the water inlet of step 2) short-cut denitrification USB reactor3 -The mass concentration ratio of-N is 1.0~3.5, in water inlet
NO3 -- N and NH4 +The mass concentration ratio 1.5~3.0 of-N；
Step 2) medium or short range denitrification USB reactor is discharged NO3 -When-N concentration is greater than 5mgN/L, hydraulic detention time HRT is improved
Or it improves carbon source and adds pump discharge to increase carbon source dosage；
NO in the water inlet of step 3) Anammox UASB reactorX --N(NO2 --N+NO3 -- N) and NH4 +The mass concentration ratio control of-N
System is 1.3~1.8；
When the mass percent of denitrification removal total nitrogen is greater than 40% in step 3) Anammox UASB reactor, the 4th is reduced
Water inlet flow rate pump improves the first water inlet flow rate pump to reduce the flow that municipal sewage enters Anammox UASB reactor
To increase the flow that municipal sewage enters short-cut denitrification USB reactor, until the mass percent of denitrification removal total nitrogen is small
In 40%.
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