CN110386717A - Sulfate reduction-is aerobic-precipitating-anaerobic system and its technique - Google Patents
Sulfate reduction-is aerobic-precipitating-anaerobic system and its technique Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/45—Phosphates containing plural metal, or metal and ammonium
- C01B25/451—Phosphates containing plural metal, or metal and ammonium containing metal and ammonium
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- 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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
- C02F3/345—Biological treatment of water, waste water, or sewage characterised by the microorganisms used for biological oxidation or reduction of sulfur compounds
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F9/00—Multistage treatment of water, waste water or sewage
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- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/70—Treatment of water, waste water, or sewage by reduction
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2001/007—Processes including a sedimentation step
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- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2305/06—Nutrients for stimulating the growth of microorganisms
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- 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
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F3/30—Aerobic and anaerobic processes
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Abstract
The present invention relates to a kind of sewage disposal process by activated sludge process, comprising the following steps: the step of sulfur cycle is introduced in the biological respinse of denitrogenation dephosphorizing；The step of sulphur source is added in the partial concentration sludge by two-stage precipitation processing；The step of cultivating sulfate reducing bacteria and generating the electron donors such as dissolubility hydrogen sulfide；The step of processed mud mixed liquid is back to activated sludge mainstream reaction tank.The invention further relates to a kind of sewage disposal systems comprising mainstream activated sludge reaction system and effluent-sulfate reduction system.Sewage disposal system of the invention is by introducing effluent-sulfate reduction system, in conjunction with sulfur cycle biological respinse, so that realizing sludge is reduced online and strengthens the denitrifying effect of mainstream.
Description
Cross reference to related applications
This application claims the priority for the U.S. Provisional Patent Application No.62/762011 that on April 17th, 2018 submits, should
The content of application is herein incorporated by reference.
Technical field
The invention belongs to sewage treatment process fields.Specifically, that this application involves a kind of sulfate reductions-is aerobic-heavy
Shallow lake-anaerobic system and sulfate reduction-it is aerobic-precipitating-anaerobic technique
Background technique
Activated sludge process and its derivative improved process are the current most widely used technologies in sewage treatment plant, have compared with
High organic matter removal effect.In traditional activated sludge process, realized under the reaction of Autotrophic nitrification and heterotrophic denitrification organic
The removal of object and nitrogen, to complete transmitting of the electronics from organic carbon to oxygen.Under conditions of different sludge ages, in sewage
50% to 60% organic carbon can be converted to carbon dioxide, and remaining 40% to 50% can be eventually converted into biological sludge.However
The operating cost of existing Activated Sludge Process is relatively high, wherein excess sludge processing and disposition (including sludge digestion stablize
Change, dehydration and burn etc. processes) account for 30% to 60% ratio, while also along with secondary pollution the problem of.In addition, traditional
The biological carbon and phosphorous removal effect of the activated sludge process reason (lack carbon source) low because of sewage degradability content of organics, often without
Method reaches the discharge standard of national sewage treatment.Therefore, the effect for denitrogenation dephosphorizing being improved while sludge reduction is current dirt
The main problem of urgent need to resolve in water treatment technology.
In mud decrement practical application, it will usually which the sludge reflux section in sewage disposal system carries out physics (at heat
Reason, ultrasonication etc.) or chemical (acid, alkali, uncoupling agent etc.) processing.Although mud decrement can achieve 60% or more, even
It completely removes, but its cost needed is excessively high, while will affect the sewage treatment performance in mainstream activated sludge tank, bringing need not
The hidden danger wanted.However, aerobic-precipitating-anaerobism (OSA) technique the features such as low energy consumption, reduced training is good is considered as relatively managing with it
The decrement approach thought.The essence of OSA is that an anaerobic sludge reaction is added in the sludge reflux section in conventional activated sludge process
Pond provides aerobic and anaerobism alternate run environment.However, the mud decrement effect of OSA technique only has 30%-40%, most
Multipotency reaches 50%；The anaerobic reactor volume of access is larger (account for mainstream activated sludge reactor 50%)；Most of carbon source
It is degraded in anaerobic reactor, it can not be effectively in mainstream reactor with being used for denitrification.
" killing mud " sewage treatment process (SANI process) of Hong Kong University of Science and Thchnology's invention is led using Hong Kong seawater toilet-flushing
Sulfate in the saline sewage of cause introduces sulfate reducing bacteria and sulfide oxidation bacterium, in the same of high efficiency synchronous removal of carbon and nitrogen
When, moreover it is possible to reach 90% mud decrement.In " killing mud " technique, sulfate reducing bacteria utilizes sulfate in first reactor
Organic matter in sewage is converted to carbon dioxide, while generating dissolubility hydrogen sulfide.Autotrophic type nitrifier reacts in third
By mineralized nitrogen it is nitrate in device, and second reactor is flowed back into, under the action of autotrophic type denitrifying bacterium, with hydrogen sulfide
Reaction generates nitrogen and sulfate.In " killing mud " technique, sulfate reduction organic matter and autotrophic denitrification reaction subtract significantly
The generation of sludge quantity is lacked, while having achieved the effect that denitrogenate.
Existing OSA technique still has biggish improvement space, in combination with sulfate reducing bacteria and sulfide reducing bacteria,
The effect for reinforcing mud decrement and denitrogenation dephosphorizing, is extremely important in the practical application of sewage treatment technique.
Summary of the invention
The present invention is directed to the deficiency of existing OSA system, raw in conjunction with sulfur cycle by introducing effluent-sulfate reduction system
Object reaction (sulfate reduction, sulfide oxidation-autotrophic denitrification reaction), so that realizing sludge is reduced online and strengthens mainstream
Denitrifying effect.
Specifically, being achieved through the following technical solutions above-mentioned purpose:
(1) a kind of sewage disposal process by activated sludge process, comprising the following steps:
The step of sulfur cycle is introduced in the biological respinse of denitrogenation dephosphorizing；
The step of sulphur source is added in the partial concentration sludge by two-stage precipitation processing；
The step of cultivating sulfate reducing bacteria and generating the electron donors such as dissolubility hydrogen sulfide；
The step of processed mud mixed liquid is back to activated sludge mainstream reaction tank.
(2) technique according to (1) further includes the steps that promoting low sludge output bacterial growth.
(3) technique according to (1), the sewage treatment process further include the step that phosphorus is recycled by the guanite precipitation method
Suddenly.
(4) technique according to (1), the sulphur source is can provide the substance of electron acceptor to sulfate reducing bacteria.
(5) technique according to (3), the sulphur source include sulfate, sulphur simple substance, thiosulfate and sulphite.
(6) technique according to claim (1), the activated sludge process include aerobic process, anoxic-aerobic process
And anaerobic-anoxic-aerobic process.
(7) a kind of sewage disposal system, including mainstream activated sludge reaction system and effluent-sulfate reduction system,
Wherein the mainstream activated sludge reaction system includes:
Water feed apparatus is used to provide sewage；
Activated sludge mainstream reaction tank, the sewage are reacted via the water feed apparatus into the activated sludge mainstream
Pond；
Second-level settling pond；
Discharging device；And
It is dirty to be used to for a part of thickened sludge handled being back to the activity through second-level settling pond for sludge refluxing apparatus
Mud mainstream reaction tank；
The effluent-sulfate reduction system includes:
Sulfate adding set is used to add sulfate to another part thickened sludge handled through second-level settling pond；
And
Sulfate reduction effluent sludge digesting unit.
(8) sewage disposal system according to (7) further includes guanite recyclable device, is used for anti-by guanite
Phosphorus should be recycled.
(9) sewage disposal system according to (7), the activated sludge mainstream reaction tank include sequence batch reactor,
Membrane reactor, granular sludge bed reactor or moving bed biofilm reactor.
(10) sewage disposal system according to (7), the sulfate reduction effluent sludge digesting unit include continuous
Stirred reactor, half batch stirred reactor or upflow anaerobic sludge blanket reactor.
Sulfate reduction-through the invention is aerobic-precipitating-anaerobism (SOSA) technique, by the way that sulfur cycle will be combined biological
Reaction is coupled with activated sludge process, has been saved carbon source, has been reduced sludge yield while strengthening sewage denitrification and dephosphorization.This
Outside, SOSA system according to the present invention also has the advantages that equipment simple, flexible operation, improvement expenses are low etc., are suitable for newly-built dirt
The mud decrement of water treatment plant is also suitble to existing sewage plant upgrading to propose mark transformation.
Detailed description of the invention
Fig. 1, which is shown, removes organic matter and denitrogenation dephosphorizing process in traditional activated sludge process；
Fig. 2 shows the flow charts of traditional aerobic-precipitating-anaerobism (OSA) technique；
Fig. 3 shows the schematic diagram of " killing mud " technique；
Fig. 4 show sulfate reduction-according to the present invention it is aerobic-flow chart of precipitating-anaerobism (SOSA) technique；
Fig. 5 shows the relationship of (a) sludge retention time (SRT) Yu volatility mud decrement percentage (VSR)；(b) dirty
The relationship of mud residence time (SRT) and sludge degradation rate (SSR)；
Fig. 6 shows the dissolubility hydrogen sulfide in (a) sulfate reduction effluent reactor for the anti-nitre of mainstream activated sludge
The diagram of change；(b) dehydration property improves degree.
Specific embodiment
The present invention is made with reference to the accompanying drawings and detailed description and further being elaborated, but embodiment is not right
The present invention limits in any form.
The present invention provides a kind of sewage disposal process by activated sludge process, comprising the following steps: in the biology of denitrogenation dephosphorizing
The step of sulfur cycle is introduced in reaction；The step of sulphur source is added in the partial concentration sludge by two-stage precipitation processing；In sulphur
The step of cultivating sulfate reducing bacteria in hydrochlorate reduction sludge digestion tank and generate the electron donors such as dissolubility hydrogen sulfide；It will processing
The mud mixed liquid crossed is back to the step of activated sludge mainstream reaction tank.
Herein, described " thickened sludge " refers to that concentration is the thickened sludge of 1g TSS/L to 2g TSS/L.Partial concentration
The ratio of sludge is 10-100%/d.
Herein, the sewage disposal process by activated sludge process be also known as sulfate reduction-it is aerobic-precipitating-anaerobism
(SOSA) technique.
Sulfate reduction effluent sludge digestion tank is introduced in SOSA technique of the invention, makes mud decrement effect better than biography
The anaerobic digester for OSA technique of uniting, and the resolvability hydrogen sulfide generated can accelerate the rate of activated sludge decaying, be conducive to
Shorten the sludge retention time of effluent reactor, to reduce the volume of effluent reactor, reduces technology investment and operating cost.
By returning to the dissolubility hydrogen sulfide generated in activated sludge mainstream reaction tank, it can be used to cultivate autotrophy
Type denitrifying bacterium-sulfide oxidation bacterium, re-directs electron stream, strengthens mainstream denitrification for Removing Nitrogen effect.
In addition, further including the steps that promoting low sludge output bacterial growth in SOSA technique of the invention.The low yield mud
Measuring bacterium is sulfate reducing bacteria and sulfide oxidation bacterium.The sulfate reducing bacteria includes but is not limited to Desulfococcus
(Desulfococcus), desulfurization bacterium section (Desulfobacteraceae) etc..The sulfide oxidation bacterium includes but is not limited to
Secondary coccus (Paracoccus), Thiobacillus (Thiobacillus) etc..The sulfate reducing bacteria passes through in sulfate reduction side
In flow reactor with zymogenous bacteria, hydrolytic bacteria collective effect, to realize mud decrement.The sulfide oxidation bacterium is in work
Property sludge mainstream reaction tank in using sulfate reduction effluent reactor generate hydrogen sulfide carry out autotrophic denitrification reaction, thus
Strengthen mainstream efficiencies of nitrogen removal.
In specific embodiments, though the sulfate reducing bacteria cultivated in effluent reactor at 20 DEG C -60 DEG C or
PH 5-10 can survive.
In preferred embodiments, SOSA technique of the invention further includes that the step of phosphorus is recycled by the guanite precipitation method
Suddenly.As described above, generate soluble hydrogen sulfide in sulfate reduction sludge digestion tank, due to hydrogen sulfide can stimulate it is dissolvable
The release of property phosphorus, therefore, periodically recycled in a manner of guanite in clear liquid or filtrate on it phosphorus can be realized it is excellent
Phosphorus recovering effect.
In SOSA technique of the invention, the sulphur source of addition is can provide the object of electron acceptor to sulfate reducing bacteria
The form of matter, the electron transmission is as shown in Equation 1.
Preferably, described can include but is not limited to sulfate to the substance of sulfate reducing bacteria offer electron acceptor
(SO4), sulphur simple substance (S0), thiosulfate (S2O3) and sulphite (SO3)。
Preferably, the activated sludge process that activated sludge mainstream reaction tank uses is not limited to specific activated sludge work
Skill, it may include aerobic process, anoxic-aerobic process and anaerobic-anoxic-aerobic process etc..
The present invention also provides a kind of sewage disposal systems, including mainstream activated sludge reaction system and effluent-sulfate
Also original system is used to provide sewage wherein the mainstream activated sludge reaction system includes: water feed apparatus；Activated sludge master
Reaction tank is flowed, the sewage enters the activated sludge mainstream reaction tank via the water feed apparatus；Second-level settling pond；Water outlet dress
It sets；And sludge refluxing apparatus, it is dirty to be used to for a part of thickened sludge handled being back to the activity through second-level settling pond
Mud mainstream reaction tank；The effluent-sulfate reduction system includes: sulfate adding set, is used for at through second-level settling pond
Another part thickened sludge of reason adds sulfate；And sulfate reduction effluent sludge digesting unit.
Preferably, the sewage disposal system further includes guanite recyclable device, is used to react back and forth by guanite
Receive phosphorus.
Sewage disposal system of the present invention be also known as sulfate reduction-it is aerobic-precipitating-anaerobism (SOSA) system.Having
In the embodiment of body, sewage enters activated sludge mainstream reaction tank by water inlet system, carries out organic matter removal and denitrogenation removes
After phosphorus reaction, goes out to flow mud mixed liquid and introduce second-level settling pond progress mud-water separation, the sewage that outlet system emission treatment is crossed.
A part of thickened sludge of two-stage precipitation bottom of pond portion is back to activated sludge mainstream reaction tank through sludge recirculation system；Another part
Thickened sludge flows into sulfate reduction effluent sludge digestion tank, takes out simultaneously after sulfate add-on system adds sufficient amount of sulfuric acid salt
The sludge of equivalent sulfate reduction effluent sludge digestion tank is taken to enter activated sludge mainstream reaction tank.When thickened sludge enters sulfuric acid
When salt restores effluent sludge digestion tank, sludge is in complete starvation, and hydrolyzes under anaerobic, discharges organic matter, sulphur
Hydrochlorate reducing bacteria reaches mud decrement, while generating dissolubility hydrogen sulfide using sulfate radical degradation organic matter.Work as sulfate reduction
The mud mixed liquid of effluent sludge digestion tank enters activated sludge mainstream reaction tank, a part of Dissolved Organic Matter having and
Hydrogen sulfide can be used for strengthening mainstream denitrogenation dephosphorizing.
Supernatant or the filtrate for periodically extracting sulfate reduction effluent sludge digestion tank, in guanite recovery system
Phosphorus is recycled by adding alkali and magnesium salts generation guanite precipitating.By guanite recovery system treated supernatant or filtrate
It flows back into activated sludge mainstream reaction tank.
In specific embodiments, it is anti-that certain specific one kind is not limited in the design of activated sludge mainstream reaction tank
Answer device, it may include sequence batch reactor, membrane reactor, granular sludge bed reactor or moving bed biofilm reactor etc..
In other specific embodiments, the sulfate reduction effluent sludge digesting unit includes continuously stirring reaction
Device, half batch stirred reactor or upflow anaerobic sludge blanket reactor.
SOSA technique according to the present invention can improve sludge quality, improve the dehydration property and settleability of activated sludge, reduce
The input cost of the techniques such as subsequent Treatment of Sludge.In addition, SOSA technique is able to achieve online mud decrement and simultaneously efficient denitrification
Dephosphorization, input cost and operation are highly reliable at low, have long-range economic benefit and environmental benefit, the reality in sewage plant
Border application has very vast potential for future development.
Compared to SANI technique, SOSA technological transformation is at low cost, only need to be in the Wastewater Treated by Activated Sludge Process system of original sewage plant
Joining side flow reactor in system, the microorganism in sludge pass through the domestication of certain time, can reach online mud decrement, improve
The effect of denitrogenation dephosphorizing；Secondly, the sulphur source added in SOSA technique is mainly for effluent, when handling not containing sulfate sewage,
The sulphur source addition cost of SOSA is lower；In addition, SANI technique phosphor-removing effect is limited, and SOSA technique is promoting the same of phosphor-removing effect
When, moreover it is possible to synchronous recycling phosphorus (in a manner of guanite).
Embodiment
Embodiment 1
System building: sulfate is carried out by carbon source of activated sludge in sulfate reduction effluent sludge digestion tank to measure
A possibility that reduction reaction, carries out fed-batch test experiment in the anaerobic reactor that effective volume is 4.0L.Used in experiment
Activated sludge is concentrated mainly from Hong Kong Shatian sewage plant, the wherein sulfate containing 300mg S/L in muddy water mixed solution, substantially
Parameter is 17-23g TSS/L and 13-16g TSS/L.In this experiment, in different sludge retention times (5,10,20,40
It) and (25 DEG C and 35 DEG C) progress sulfate reductions of different temperatures.
As a result: table 1 lists the experimental result of sulfate reduction effluent reactor, including organic loading (OLR, kg VS/
m3/ d), sludge degradation rate (SSR, kg VS/m3/ d), volatility mud decrement percentage (VSR, %) and sulfate reduction (Δ
SO4, mg S/L).As can be seen from Table 1, as can be seen from Table 1 when temperature is 35 DEG C, when SRT is 20 and 40 days, volatilization
Property mud decrement and sulfate reduction effect are good, and when SRT shorten to 10 and 5 days (35 DEG C), performance capabilities (VSR and Δ
SO4) halve.When temperature is down to 25 DEG C, although mud decrement effect is deteriorated, sulfate reduction effect is still good, in SRT
When for 5 days (when temperature being reduced to 25 DEG C), Δ SO4105mg S/L can also be reached.According to the measured data (table of T1, T2, T3 and T4
2), the relationship of sludge retention time (SRT) and volatility mud decrement percentage (VSR) and specific sludge degradation rate (SSR)
It is illustrated respectively in Fig. 5 (a) and (b).It is obtained in conjunction with table 1 and Fig. 5, sulfate reduction is 5-10 days in sludge retention time
When, it still is able to fast degradation sludge and carries out sulfate reduction；Meanwhile shortening sludge retention time and greatly promoting specifically
Sludge degradation rate.
The experimental result of 1 sulfate reduction effluent reactor of table
2 sludge retention time of table (SRT) and sludge degradation rate (SSR) and volatility mud decrement percentage (VSR)
Relationship.
Embodiment 2
Experiment: the dissolubility hydrogen sulfide in sulfate reduction effluent reactor is used for mainstream activated sludge denitrification possibility
Verifying；The improvement degree of dehydration property after processing.
Activated sludge used in experiment a is derived from Hong Kong Shatian sewage plant, in the glass anaerobic reactor of 2.0L volume
It carries out autotrophic denitrification reaction (25 DEG C), wherein sulfide initial concentration is 75mg S/L, and nitrate initial concentration is 50mg N/
L is sampled for every 30 minutes, until nitrate or sulfide concentration are 0.
The dewatering for comparing three kinds of sludge in b simultaneously is tested, methane phase method digested sludge is derived from Hong Kong Shatian sewage plant
Anaerobic sludge digestion cylinder, the sludge of sulfate reduction method digestion is derived from the sludge of T5 in embodiment 1, and activated sludge is derived from Shatian
The activated sludge cylinder of sewage plant.Dewatering indicates that physical significance is the sludge of unit mass in a level pressure with sludge specific resistance
Resistance when being filtered under power in unit filter area.Sludge specific resistance is bigger, and dewatering is poorer.
Experiment effect is as shown in Figure 6 a, and sulfate reduction effluent reactor generates while reinforced anaerobic mud decrement
Dissolubility vulcanization Hydrogen Energy for mainstream denitrification promotion denitrogenate efficiency；Fig. 6 b's the result shows that be changing for dehydration property
Kind, the activated sludge dehydration performance boost 45% of sulfate reduction digestion improves with the dehydration property digested through methanogen
Degree is suitable.
Therefore, a small amount of sulfate is added in effluent reactor, to cultivate sulfate reducing bacteria, is subtracted to reach online sludge
Amount and reinforcing mainstream nitric efficiency are a kind of new technologies of inexpensive low energy consumption, are suitable for sulfur-containing waste water or Normal wastewater is (logical
Cross addition sulfate).
Claims (10)
1. a kind of sewage disposal process by activated sludge process, comprising the following steps:
The step of sulfur cycle is introduced in the biological respinse of denitrogenation dephosphorizing；
The step of sulphur source is added in the partial concentration sludge by two-stage precipitation processing；
The step of cultivating sulfate reducing bacteria and generating the electron donors such as dissolubility hydrogen sulfide；
The step of processed mud mixed liquid is back to activated sludge mainstream reaction tank.
2. technique according to claim 1 further includes the steps that promoting low sludge output bacterial growth.
3. technique according to claim 1, the sewage treatment process further includes recycling phosphorus by the guanite precipitation method
Step.
4. technique according to claim 1, the sulphur source is can provide the substance of electron acceptor to sulfate reducing bacteria.
5. technique according to claim 3, the sulphur source includes sulfate, sulphur simple substance, thiosulfate and sulphite.
6. technique according to claim 1, the activated sludge process includes aerobic process, anoxic-aerobic process and anaerobism-
Anoxic-aerobic process.
7. a kind of sewage disposal system, including mainstream activated sludge reaction system and effluent-sulfate reduction system,
Wherein the mainstream activated sludge reaction system includes:
Water feed apparatus is used to provide sewage；
Activated sludge mainstream reaction tank, the sewage enter the activated sludge mainstream reaction tank via the water feed apparatus；
Second-level settling pond；
Discharging device；And
Sludge refluxing apparatus is used to a part of thickened sludge handled through second-level settling pond being back to the activated sludge master
Flow reaction tank；
The effluent-sulfate reduction system includes:
Sulfate adding set is used to add sulfate to another part thickened sludge handled through second-level settling pond；And
Sulfate reduction effluent sludge digesting unit.
8. sewage disposal system according to claim 7 further includes guanite recyclable device, is used for anti-by guanite
Phosphorus should be recycled.
9. sewage disposal system according to claim 7, the activated sludge mainstream reaction tank include sequence batch reactor,
Membrane reactor, granular sludge bed reactor or moving bed biofilm reactor.
10. sewage disposal system according to claim 7, the sulfate reduction effluent sludge digesting unit includes continuous
Stirred reactor, half batch stirred reactor or upflow anaerobic sludge blanket reactor.
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| CN111018265A (en) * | 2019-12-31 | 2020-04-17 | 上海坤工环境科技有限公司 | Adaptive variable-mode sewage treatment method for combined sewage system |
| CN111253129A (en) * | 2020-02-20 | 2020-06-09 | 於孝牛 | Preparation method of seawater calcareous sand basalt fiber cement-based composite material |
| CN112624497A (en) * | 2020-12-02 | 2021-04-09 | 香港科技大学深圳研究院 | Sludge reduction promotion method based on sulfate reduction and electrochemical pretreatment |
| CN113998849A (en) * | 2021-10-08 | 2022-02-01 | 沧州市供水排水集团有限公司 | Method for recycling phosphorus from excess sludge |
| CN114620907A (en) * | 2022-04-15 | 2022-06-14 | 合肥工业大学 | Autotrophic deep denitrification method for producing hydrogen sulfide by using sludge |
| CN115403234A (en) * | 2022-08-29 | 2022-11-29 | 广州市香港科大***研究院 | Method for realizing carbon source supplement and sludge reduction based on free nitrite and sulfate |
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