CN204185299U - Be the device of advantage Filamentous Bulking with H.hydrossis under a kind of effective control hypoxia condition - Google Patents
Be the device of advantage Filamentous Bulking with H.hydrossis under a kind of effective control hypoxia condition Download PDFInfo
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- CN204185299U CN204185299U CN201420629685.1U CN201420629685U CN204185299U CN 204185299 U CN204185299 U CN 204185299U CN 201420629685 U CN201420629685 U CN 201420629685U CN 204185299 U CN204185299 U CN 204185299U
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Abstract
Be a device for advantage Filamentous Bulking with H.hydrossis under effective control hypoxia condition, belong to field of biological sewage treatment.Apparatus main body A/O reactor V
(oxygen-starved area): V
(aerobic zone)=1:1.5 ~ 1.2.0, oxygen-starved area is divided at least 2 lattice, and aerobic zone is divided at least 5.First sanitary sewage enters oxygen-starved area, and next enters aerobic zone, then enters second pond by last lattice room, aerobic zone and carry out mud-water separation, and last supernatant liquor is discharged; Sedimentation in secondary sedimentation tank sludge reflux is to anoxic 1 lattice room, and reflux ratio is 80% ~ 120%, and nitrification liquid is back to anoxic 1 lattice room by last lattice room, aerobic zone, and reflux ratio is 130% ~ 170%.This device makes to be that advantage hyphomycetic mud undesirable extention problem obtains effective control with H.hydrossis by adjustment current streaming and raising dissolved oxygen, avoids system sludge and runs off, maintain the normal operation of system.
Description
Technical field
The utility model belongs to field of biological sewage treatment, and providing under a kind of effective control hypoxia condition take H.hydrossis as the device of advantage Filamentous Bulking, for the control program of sludge bulking is put forward by each actual sewage treatment plant.
Background technology
At present, economize on resources and the advantage of cost owing to having, most of sewage work of China all adopts Wastewater Treated by Activated Sludge Process sewage, but activated sludge bulking is a kind of phenomenon often occurred in activated sludge method, when sludge bulking occurs, the sedimentation of mud and compression performance are deteriorated, and sludge loss is serious, finally causes system crash.Activated sludge bulking is divided into Filamentous Bulking and non-filamentous bacteria sludge bulking two type substantially.And most of sludge bulking problem is caused by filamentous microorganism hyper-proliferative, and become an important problem of restriction denitrification effect gradually, have a strong impact on the operation of municipal sewage plant's denitrification process.Therefore how effectively to control Filamentous Bulking economically, be the Focal point and difficult point of China's water treatment aspect always.
But thread fungus is mainly concentrated on for the correlative study of thread fungus field and flco forms bacterium competitive growth condition aspect both at home and abroad at present, lack the research for thread fungus microbiology flora feature and transition process, adopt the control method adding medicament not only can increase treatment cost for Filamentous Bulking, also can impact Bacterial community in system, serious also can cause sludge activity suppressed, and system treatment effect declines.Other biological biological selector (as anaerobic selector, anaerobic biological selector, aerobic selector switch etc.), although better to a part of Filamentous Bulking effect, lack specific aim, often causes the unnecessary wasting of resources in governance process.
Therefore, develop very necessary for the hyphomycetic effective control method of specific advantages, the system advantage bacterial classification clearly expanded, abundant investigation is correlated with microbiology growth mechanism, the physiological property of specified strain, propose for its physiological property the control method suppressing its advantage thread fungus propagation on this basis, thus realize the effective control to sludge bulking.
Utility model content
For the weak point of above-mentioned research, the utility model provides a kind of device, mainly for taking H.hydrossis as advantage hyphomycetic hypoxemia sludge bulking problem, provides control method accurately and effectively, to avoid the sludge loss in system, reach the object maintaining system stable operation.
For achieving the above object, the utility model provides and effectively controls the device that hypoxia condition take H.hydrossis as advantage Filamentous Bulking: reactor body is A/O reactor, V
(oxygen-starved area): V
(aerobic zone)=1:1.5 ~ 1.2.0 (preferred 1:1.75), oxygen-starved area is divided at least 2 lattice (preferably 2 lattice), every lattice install 1 cover whipping appts, and aerobic zone is divided at least 5 lattice (preferably 5 lattice), and every lattice are installed 1 cover and stirred and aerating apparatus, sanitary sewage enters oxygen-starved area first successively, namely anoxic first lattice then lattice are at the most entered successively, for preventing back-mixing, completely airtight between last lattice of oxygen-starved area and aerobic zone first lattice, last lattice liquid level of oxygen-starved area is higher than aerobic zone first lattice (preferred 2cm), mixed solution enters aerobic zone first lattice by overflow, other each lattice rooms, aerobic zone are entered successively from aerobic zone first lattice, mixed solution is the flowing in wave between each lattice room, then be connected with second pond by last lattice room, aerobic zone, last lattice room, aerobic zone is also connected with oxygen-starved area first lattice simultaneously, the lower end of second pond is connected with oxygen-starved area first lattice, connect excess sludge vent pipe simultaneously, last second pond supernatant liquor is discharged.
Adopting said apparatus to taking H.hydrossis as advantage hyphomycetic hypoxemia sludge bulking control method, comprising the following steps:
(1) first when keeping aerobic zone cumulative volume constant, general for system aerobic zone 3 lattice are increased to 5 lattice or many lattice, and it is as follows to adopt pH meter, dissolved oxygen probe, thermometer and other conventional sense means to detect other operational conditionss of guarantee system in real time: MLSS maintains 2000 ~ 3500mg/L, medial temperature is 22 ~ 30 DEG C (preferably 26 DEG C), pH is the pH value (not needing special allotment) of sewage itself, organic loading is 0.25 ~ 0.31 (preferably 0.28) kgCOD/ (kgMLSSd), V
(oxygen-starved area): V
(aerobic zone)=1:1.5 ~ 1.2.0 (preferred 1:1.75), oxygen-starved area hydraulic detention time is 2.8 ~ 3.2h (preferred 3.04h), sedimentation in secondary sedimentation tank sludge reflux is to the return sludge ratio 80% ~ 120% (preferably 100%) of lattice room, oxygen-starved area first, nitrification liquid is back to the internal reflux ratio 130% ~ 170% (preferably 150%) of lattice room, oxygen-starved area first by last lattice room, aerobic zone, aerobic zone dissolved oxygen average out to 0.3 ~ 0.8mg/L (preferred 0.5mg/L), sludge age is 25 ~ 30d (preferred 28d), mud is compared to sludge bulking state before, aerobic zone lattice number of chambers object increases, make flow-shape closer to plug-flow pattern, reduce the competitive edge of thread fungus in system (fluorescence in situ hybridization technique identifies that H.hydrosis thread fungus is dominant bacteria), make the average SVI value of system by more than 150ml/g (under swelling state, the utility model is particularly useful for SVI value 200 ~ 800ml/g) decrease, second pond sludge settling property is improved.Control to terminate, if do not have to enter control subordinate phase if system SVI value reaches below 150ml/g.
(2) subordinate phase: by regulating Ge Ge room, aerobic zone aeration rate, each lattice room dissolved oxygen of aerobic zone is risen to 0.8 ~ 1.5mg/L (preferred 1mg/L), make the dissolved oxygen of subordinate phase higher than the first stage, step (1) is the first stage, the hyphomycetic hyper-proliferatives such as further suppression H.hydrosis, the changing conditions of SVI value and mud flora in close attention system in the process, the average SVI value of system decreases, simultaneously due to nitration denitrification effect, the clearance of total nitrogen is greatly improved, finally make ammonia nitrogen in water outlet, total nitrogen and COD each index mean value reach country-level A standard, control to terminate if system SVI value reaches below 150ml/g, control the phase III if do not have to enter,
(3) phase III: by the analysis of each index of system, for improving the settling property of mud further, continuing to improve Ge Ge room, aerobic zone dissolved oxygen is 1.5mg/L and above (preferred 2mg/L), make the dissolved oxygen of phase III higher than subordinate phase, sludge settling property in real-time detecting system, the SVI value stabilization of final mud runs and long term maintenance at below 150mL/g, and sludge bulking state obtains permanently effective control.
Compared with prior art, the utility model has the following advantages:
(1) control device and the method for advantage Filamentous Bulking that what the utility model provided with H.hydrossis is, when not adding any chemical agent, reach the permanently effective control object of this type of sludge bulking, that has saved chemical agent adds cost.
(2) control device of this sludge bulking and method adopt in-situ control, do not need bulking sludge to transfer in other treatment process and reactor to carry out, and do not need additionally to arrange selector switch, save unnecessary processing links and construction process, control by means of only increase lattice number of chambers order and raising dissolved oxygen, control device is simple and easy to do.
(3) control device of this sludge bulking and method are that preliminary analysis specific advantages thread fungus (H.hydrossis thread fungus) physiology characteristic is developed by basis, with strong points and Be very effective is a kind of specially for the permanently effective control program of H.hydrossis advantage Filamentous Bulking.
(4) the utility model can control according to sludge bulking degree, and high level expansion mud more can embody control effects, and water outlet can reach national A grade standard during the course.
Accompanying drawing explanation
Fig. 1 is the structure iron of the utility model device section;
In Fig. 1, primary symbols is described as follows:
1-raw water box 2-peristaltic pump 3-agitator
4-DO, pH and temp probe 5-multi-parameter detector 6-aeration pump
7-aeration head 8-second pond 9-water inlet pipe
Liquid level 11-aerobic zone, 10-oxygen-starved area liquid level 12-internal reflux pipe
13-mud return line 14-rising pipe 15 excess sludge.
Fig. 2 is that before and after the utility model embodiment 1 bulking sludge controls, H.hydrossis advantage thread fungus FISH detects picture (1000 times);
A is picture under sludge bulking state, and b is that sludge bulking effectively controls rear picture;
Fig. 3 is the utility model embodiment 1 sludge bulking control process each stage system SVI value variation diagram;
Fig. 4 is the utility model sludge bulking process control chart.
Embodiment
Below in conjunction with accompanying drawing and the concrete implementation method that controls, the utility model is described in further detail, but the utility model is not limited to following examples.
As shown in Figure 1, provide a kind of take H.hydrossis as control device and the method for advantage hyphomycetic hypoxemia sludge bulking problem to equipment therefor, to avoid the sludge loss in system, reaches the object maintaining system stable operation.This device comprises: inlet chest (sewage takes from actual family members' community life sewage), A/O main body reactor, second pond (23L adopts pipe core water inlet, peripheral overflow water outlet) three parts.Wherein core is A/O main body reactor, and reactor cumulative volume is 57L (can expand or reduce), V
(oxygen-starved area): V
(aerobic zone)=1:1.75, wherein oxygen-starved area is divided into 2 lattice, and every lattice install 1 cover whipping appts.Aerobic zone is divided into 5 lattice, and every lattice are installed 1 cover and stirred and aerating apparatus.Its operational process is as follows:
(1) in water tank, sanitary sewage controls constant flow rate by peristaltic pump and enters oxygen-starved area (entering lattice room, oxygen-starved area 1 in the middle part of anoxic 1 lattice room)
(2) sedimentation in secondary sedimentation tank mud is back to lattice room, oxygen-starved area 1, replenishment system sludge quantity, sludge concentration constant in maintenance system by bottom conduit by peristaltic pump coutroi velocity (return sludge ratio preferably 100%).
(3) nitrification liquid is back to anoxic 1 lattice room by last lattice room, aerobic zone by peristaltic pump coutroi velocity (internal reflux ratio preferably 150%), through aerobic zone, sufficient nitrification changes nitric nitrogen into ammonia nitrogen, be back to oxygen-starved area by aerobic zone and carry out denitrification, reach the effect of denitrogenation.
(4) sanitary sewage is with returned sluge and reflux nitrification liquid after lattice room, oxygen-starved area 1 fully mixes, and enters lattice room, oxygen-starved area 2 or many lattice room by bottom lattice room, oxygen-starved area 1, and current are flowed in wave
(5) for preventing back-mixing, last lattice of oxygen-starved area and aerobic zone 1 lattice completely airtight, oxygen-starved area liquid level is higher than aerobic zone (preferred 2cm), and mixed solution enters lattice room, aerobic zone 1 by overflow
(6) mixed solution is that wave flowing (mixing completely for making mixed solution) enters aerobic 2 to lattice room more successively subsequently
(7) last mixed solution enters second pond by last lattice room overflow aerobic and carries out mud-water separation, and supernatant liquor is discharged, and mud precipitates, and a part is discharged as excess sludge, and a part carries out sludge reflux.
Sludge bulking control method of the present utility model comprises the following steps (shown in Fig. 4):
(1) sludge bulking system aerobic zone 3 lattice are increased to 5 lattice, other operational conditionss of Controlling System are as follows: MLSS maintains 2000 ~ 3500mg/L, system medial temperature preferably 26 DEG C, pH value is system itself, and organic loading is 0.28kgCOD/ (kgMLSSd), and oxygen-starved area hydraulic detention time is 3.04h, return sludge ratio 100%, internal reflux ratio 150%, aerobic zone dissolved oxygen remains 0.5mg/L, and sludge age is 28d.Mud is compared to sludge bulking state before, aerobic zone lattice number of chambers object increases, make flow-shape closer to plug-flow pattern, reduce the competitive edge of thread fungus in system (fluorescence in situ hybridization technique identifies that H.hydrosis thread fungus is dominant bacteria), make the average SVI value of system be reduced to 350ml/g by 500ml/g (more than 150ml/g is swelling state), second pond sludge settling property is improved.And in the process, system water outlet ammonia nitrogen, total nitrogen and COD mean value 26.43,32.04 and 49.25mg/L, the ammonia nitrogen of this stage system, total nitrogen and COD average removal rate are 65.82%, 58.97% and 81.42%.
(2) for making system sludge settling property be promoted further, each lattice room dissolved oxygen of aerobic zone is risen to 1mg/L, the hyphomycetic hyper-proliferatives such as further suppression H.hydrosis, the changing conditions of SVI value and mud flora in close attention system in the process.Facts have proved: due to nitration denitrification effect, the clearance of total nitrogen is greatly improved, this later stage in stage system water outlet ammonia nitrogen is almost 0, total nitrogen and COD mean value are 10.99 and 38.96mg/L, total nitrogen and the COD average removal rate of this stage system are 84.52% and 81.85%, and in water outlet, ammonia nitrogen, total nitrogen and COD each index mean value reaches country-level A standard.The average SVI value of this stage system is reduced to 315ml/g simultaneously.
(3) by the analysis of each index of system, for improving the settling property of mud further, continuing to improve Ge Ge room, aerobic zone dissolved oxygen is 2mg/L, sludge settling property in real-time detecting system, the SVI value of final mud reduces (lower than 150mL/g), be in stable decrement phase in later stage operation always and reach one month, sludge bulking state obtains permanently effective control.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Comparative example
Each parameter is substantially identical with above-described embodiment 1, unlike V
(oxygen-starved area): V
(aerobic zone)=1:2.60, the HRT 2.33h of oxygen-starved area, under subordinate phase dissolved oxygen about 2mg/L operational conditions, total nitrogen average removal rate is 49.48%, COD average removal rate is 82.03%, so the nitrogen removal rate that above-described embodiment 1 compares ratio subordinate phase improves 14.11%, COD average removal rate improve 6.34%.
Claims (2)
1. effectively control the device that hypoxia condition take H.hydrossis as advantage Filamentous Bulking, it is characterized in that, reactor body is A/O reactor, V
(oxygen-starved area): V
(aerobic zone)=1:1.5 ~ 1.2.0, oxygen-starved area is divided at least 2 lattice, and every lattice install 1 cover whipping appts, and aerobic zone is divided at least 5 lattice, and every lattice are installed 1 cover and stirred and aerating apparatus, sanitary sewage enters oxygen-starved area first successively, namely anoxic first lattice then lattice are at the most entered successively, for preventing back-mixing, completely airtight between last lattice of oxygen-starved area and aerobic zone first lattice, last lattice liquid level of oxygen-starved area is higher than aerobic zone first lattice, mixed solution enters aerobic zone first lattice by overflow, other each lattice rooms, aerobic zone are entered successively from aerobic zone first lattice, mixed solution is the flowing in wave between each lattice room, then be connected with second pond by last lattice room, aerobic zone, last lattice room, aerobic zone is also connected with oxygen-starved area first lattice simultaneously, the lower end of second pond is connected with oxygen-starved area first lattice, connect excess sludge vent pipe simultaneously, last second pond supernatant liquor is discharged.
2. according to the device of claim 1, it is characterized in that, V
(oxygen-starved area): V
(aerobic zone)=1:1.75, oxygen-starved area is divided into 2 lattice, and aerobic zone is divided into 5 lattice.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104445614A (en) * | 2014-10-28 | 2015-03-25 | 北京工业大学 | Device and method for effectively controlling sludge bulking taking H.hydrossis as predominant filamentous bacterium under low oxygen condition |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104445614A (en) * | 2014-10-28 | 2015-03-25 | 北京工业大学 | Device and method for effectively controlling sludge bulking taking H.hydrossis as predominant filamentous bacterium under low oxygen condition |
| CN104445614B (en) * | 2014-10-28 | 2016-06-29 | 北京工业大学 | With the H.hydrossis device and method for advantage Filamentous Bulking under a kind of effective control hypoxia condition |
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