CN203159330U - Sewage treatment system - Google Patents
Sewage treatment system Download PDFInfo
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- CN203159330U CN203159330U CN 201320110783 CN201320110783U CN203159330U CN 203159330 U CN203159330 U CN 203159330U CN 201320110783 CN201320110783 CN 201320110783 CN 201320110783 U CN201320110783 U CN 201320110783U CN 203159330 U CN203159330 U CN 203159330U
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Abstract
The utility model provides a sewage treatment system. The sewage treatment system comprises a biochemical pool which is partitioned into an anaerobic zone and an aerobic zone by a pool wall; the anaerobic zone is provided with a raw water inlet and at least one stirring machine; the aerobic zone is provided with an aerator, a water decanter, an activated strain inlet, an excess sludge outlet and a water outlet; and a reflux sludge pipeline is arranged at the lower part of the biochemical pool. A CASS pool is used as the biochemical pool, so that the interception of the sludge can be effectively realized so as to reduce the sludge loss. By adding high-efficiency ammonia nitrogen strain, the ammonia nitrogen treatment capability of the biochemical pool can be fast improved, the impact of factors such as temperature and the like can be reduced, and the quality of effluent water can be steadied. The proportion of improving the nitrifying bacteria in the activated sludge can be improved within short time by adopting a manner of adding enough strain to needed concentration and supplementing addition of less strains for many times to maintain the concentration of the strain. Under the low-temperature condition, by adopting the same technological running parameters, the ammonia nitrogen concentration of the effluent water of the sewage treatment system is lower than that of the effluent water of the traditional treatment system.
Description
Technical field
The utility model belongs to field of waste water treatment, is specially a kind of system that uses Wastewater Treated by Activated Sludge Process waste water.
Background technology
Biological denitrification process is widely used in town domestic sewage to be handled.Under aerobic condition, nitrifier is oxidized to nitrate with ammonia nitrogen in the water, realizes ammonia nitrogen removal.Under the normal temperature condition, biological denitrification process has advantages such as ammonia nitrogen processing efficiency height, technology be stable.Wherein, the CASS method is the abbreviation of circulating type active sludge method.The CASS reaction tank is designed to two portions along the pond length direction, and the front portion is the oxygen-starved area, and the rear portion is aerobic zone, and liftable automatic slash water device (straining hydrophone) has been installed at its aerobic zone rear portion.Processes such as the water inlet of whole technology, aeration, precipitation, draining are in the intercycle circular flow of same pond, microorganism is arranged in the active sludge, that microorganism then is in is aerobic, among the anoxic, anaerobism periodical change, thereby reach the pollutant removal effect, also have denitrogenation preferably, phosphorus removal functional simultaneously.
Sewage treatment systems is subjected to multiple factor affecting such as the kind, quantity, temperature of nitrifier to the treatment effect of ammonia nitrogen.At 20 ℃～30 ℃, it is maximum that the activity of nitrifier reaches, and Sewage treatment systems is to the processing efficiency height of ammonia nitrogen, and the water outlet ammonia nitrogen concentration is low; When temperature was lower than 16 ℃, the activity with temperature of nitrifier reduced and to be index decreased, and Sewage treatment systems is low to the dissolved oxygen utilization ratio, and the processing efficiency of ammonia nitrogen is significantly descended, and the water outlet ammonia nitrogen concentration raises.
For stablizing effluent quality, realize sanitary sewage qualified discharge under the cold condition, adopt usually and improve biochemistry pool aerobic section sludge concentration, to improve the quantity of nitrifier indirectly, concrete measure has: improve return sludge ratio, increase the biochemistry pool sludge concentration; Adopt equipment such as membrane bioreactor, hold back the microorganism that takes away with water outlet to greatest extent, reduce active sludge and run off.There are 2 deficiencies in aforesaid method: the first, improve sludge concentration in the biochemistry pool, and not only improved the quantity of nitrifier, also improved heterotrophic bacteria quantity such as decarburization bacterium simultaneously, the ratio of nitrifier does not improve.Heterotrophic bacteriums such as decarburization bacterium utilize ability greater than nitrifier the competition of dissolved oxygen to be utilized ability to the competition of dissolved oxygen, and a large amount of dissolved oxygens is consumed by heterotrophic bacteriums such as decarburization bacterium, causes energy dissipation.The second, investment and running cost height.The membrane bioreactor construction investment is higher, and because needs are opened equipment such as vacuum pump, operation energy consumption is much higher than conventional treatment process, the running maintenance more complicated; Improve return sludge ratio, need to strengthen the returned sluge pump horsepower, also can increase operation energy consumption.
The utility model content
At the weak point that prior art exists, the purpose of this utility model is to propose a kind of Sewage treatment systems, can reach the effect of sewage disposal at low temperatures.
The technical scheme that realizes the utility model purpose is:
A kind of Sewage treatment systems comprises biochemistry pool, and described biochemistry pool is divided into oxygen-starved area and aerobic zone, and oxygen-starved area and aerobic zone are separated by pool wall;
Described oxygen-starved area is provided with former water (pending sewage) entrance and at least one stirrer;
Described aerobic zone is provided with aerator, strains hydrophone, activated spawn entrance, excess sludge outlet and water outlet;
Be provided with the returned sluge pipeline in the biochemistry pool.This sludge return pipe passes pool wall, is used for aerobic zone mud is delivered in the oxygen-starved area.
Wherein, described biochemistry pool is outside equipped with the actication of culture device, and described actication of culture device is connected with the aerobic zone of biochemistry pool by the bacterial classification pipeline.
Wherein, described actication of culture device comprises container, efflux aerator.
Wherein, described stirrer is 1-4.
Wherein, also be provided with return sludge pump on the pipeline of described returned sluge.
Wherein, also be provided with residual sludge pump in the described aerobic zone, described residual sludge pump is connected with the excess sludge outlet.Excess sludge is discharged biochemistry pool, and returned sluge plays the effect of removing pollutents such as nitrate at the biochemistry pool internal reflux.Under the routine operation condition, the ratio of sludge back flow quantity and biochemistry pool flooding quantity is 1:0.5-1:1; It is definite that the quantity discharged of excess sludge is looked the interior sludge concentration of biochemistry pool, is used for keeping the sludge concentration of biochemistry pool between 3000mg/L-6000mg/L.
The Sewage treatment systems that use the utility model proposes is carried out the method for sewage disposal, comprising: the ammonia nitrogen bacterial classification is placed in the container, and aeration activates 20-26 hour, then the gained activated spawn is joined the aerobic zone of biochemistry pool.Added capacity in first day, add every day then, making the interior ammonia nitrogen bacterial spawn volume concentrations of biochemistry pool is 3-5ml/m
3Ammonia nitrogen bacterial classification described in the utility model has the ability of removing ammonia nitrogen in the sewage for through the nitrifier flora after screening, the cultivation, can adopt commercially available bacterial classification.The temperature of the former water of handling is 4-16 ℃.
Present method adopts the capacity ammonia nitrogen high-efficiency strain quantity mode that once adds, and handles the ability of low-temperature wastewater ammonia nitrogen with rapid raising Sewage treatment systems.Present method is utilized CASS pool process operation scheme and is strained the good mud-water separation effect of hydrophone, can hold back the ammonia nitrogen bacterial classification in most biochemistry pools; But the minute quantity bacterial classification can be because do not form zoogloea, and sedimentation function is poor, and is taken out of biochemistry pool by water outlet, causes ammonia nitrogen bacterial classification concentration reduction in the biochemistry pool.For stablizing the concentration of ammonia nitrogen high-efficiency strain in the biochemistry pool, present method takes add the mode of a small amount of ammonia nitrogen bacterial classification in the biochemistry pool aerobic section every day, to keep ammonia nitrogen bacterial classification concentration in the biochemistry pool, stablizes the ability that biochemistry pool is handled ammonia nitrogen.Concrete measure is: calculate biochemistry pool volume and initial operating stage ammonia nitrogen high-efficiency strain dosage; Initial operating stage with the activation of capacity ammonia nitrogen high-efficiency strain, and once drops in the biochemistry pool aerobic section, makes the concentration of ammonia nitrogen high-efficiency strain in the biochemistry pool reach 3-5ml/m
3(biochemistry pool volume) utilizes biochemistry pool to finish the domestication of ammonia nitrogen high-efficiency strain, cultivation; According to the volume of biochemistry pool with handle the water yield every day, add a small amount of ammonia nitrogen high-efficiency strain to the estimation of biochemistry pool aerobic section; Biochemistry pool moves according to design variable every day.
Wherein, the volume of described adding activated spawn and biochemistry pool volume ratio are 1:2500-10000.Take to add the capacity bacterial classification to needs concentration for the first time, replenish every day then and add a small amount of bacterial classification, be used for keeping bacterial classification concentration.
Wherein, described activated spawn is that the ammonia nitrogen bacterial classification is placed in the container, adds former water again and mixes with it, with the activation of efflux aerator aeration, obtains mud mixture, joins then in the biochemistry pool, and the volume of ammonia nitrogen bacterial classification accounts for the 0.07-1% of this mud mixture volume.When initially adding bacterial classification, prepare activated spawn according to 1% volume ratio in the actication of culture device; Operation phase, prepare activated spawn according to 0.07-0.14% in the actication of culture device.The ammonia nitrogen bacterial classification adopts the forwarding motor form to be transported to the scene usually.Because the ammonia nitrogen bacterial classification is in anoxic condition in the transportation midium or long term, when transporting the scene to, bacterial activity is suppressed.For recovering bacterial activity, present method at first adopts a small containers as the actication of culture device, as former water, the ammonia nitrogen bacterial classification is carried out the aeration activation with sewage in the biochemistry pool, and the aeration soak time is 22-26 hour.
Described sewage water treatment method provides circulating active sludge, makes ammonia nitrogen concentration reduction in the former water, by straining hydrophone water is discharged then.
Former water comprises also described former water is carried out pre-treatment that described pre-treatment comprises that grid is handled and settling pit is handled before entering biochemistry pool; Adopt grid from former water, to remove the thicker suspended substance that may stop up water pump assembly and pipeline valve, guarantee that the subsequent disposal facility can normally move; Adopt the settling pit facility from former water, to remove the bigger particles of proportion such as sand, cinder, in order to avoid the normal operation of these impurity effect subsequent disposal structures.
The beneficial effects of the utility model are:
1, reduces investment and running cost.Select for use the CASS pond as biochemistry pool, effective realization is held back mud, reduces sludge loss.Than adopting forms such as membrane bioreactor, contact tank, reduce the buying expenses of membrane module and filler, reduce initial cost.Simultaneously, in the process of production run, the biochemistry pool water outlet realizes mud-water separation by straining hydrophone, does not need to open devices such as vacuum pump, has reduced the maintenance cost of power consumption and equipment.
2, by adding the ammonia nitrogen high-efficiency strain, can improve the ammonia nitrogen processing power of biochemistry pool rapidly, reduce the impact of factors such as temperature, stablize effluent quality.
3, present method takes once to add capacity ammonia nitrogen high-efficiency strain mode, can improve the ratio of nitrifier in the active sludge in the short period of time.Under the cold condition, adopt identical technology operating parameter, the described Waste Water Treatment water outlet of present method ammonia nitrogen concentration is lower than employing traditional technology Waste Water Treatment water outlet ammonia nitrogen concentration.
Description of drawings
Fig. 1 is the vertical view of the utility model embodiment 1 biochemistry pool.
Fig. 2 is the biochemistry pool A-A sectional view of Fig. 1.
Among Fig. 1 and 2,1 is stirrer, and 2 is return sludge pump, 3 is aerator, and 4 is residual sludge pump, and 5 for straining hydrophone, 6 is the bacterial classification pipeline, and 7 is the oxygen-starved area, and 8 is aerobic zone, 9 is gas blower, 10 is the actication of culture device, and 11 is raw water pipeline, and 12 is outlet conduit, 13 is the returned sluge pipeline, and 14 is the excess sludge pipeline.
Fig. 3 is the data comparison diagram of the effect of embodiment 2 contrast treatment sewage.
Embodiment
Now with following most preferred embodiment the utility model is described, but is not used for limiting scope of the present utility model.If do not specialize the conventional means that used technique means is well known to those skilled in the art among the embodiment.
Among the embodiment, the ammonia nitrogen bacterial classification is available from Su Kehan (Weifang) bio-engineering corporation, the SKHZYE-MW013 type, and containing bacterial classification quantity in every milliliter of ammonia nitrogen bacterial classification solution is 10
9Individual activation unit.
Embodiment 1: Sewage treatment systems
Referring to Fig. 1 and Fig. 2.Biochemistry pool (CASS pond) is divided into two portions along the water inlet direction, and front end is oxygen-starved area 7, and the rear end is aerobic zone 8, and the centre separates with pool wall.Oxygen-starved area 7 wide 20m, depth of water 5m, volume 750m
3, in be provided with two diving mixers 1; Aerobic zone 8 wide 20m, depth of water 5m, volume 4250m
3, in establish return sludge pump 2, residual sludge pump 4 and strain each one of hydrophone 5, straining hydrophone 5, to strain outlet capacity be 1700m
3/ h, the bottom has among aerator 3(Fig. 1 a plurality of circles represent aeration head).Aerator 3 is by gas blower 9 air-supplies.
Actication of culture device 10 main bodys are 1 plastic tank (container), and volume is 1m
3(1m*1m*1m), can handle water yield 1m at every turn
3In biochemistry pool aerobic zone 8, enter 0.5m at every turn
3Mud mixture.The actication of culture device adopts efflux aerator that the mud mixture in the plastic tank is carried out aeration, mixing, and the actication of culture time is 24h.When activation stage finished, activating apparatus entered mud mixture in the CASS pond aerobic zone 8 that is in the aeration state by bacterial classification pipeline 6.
Subsequently, get former water again and enter container, add the ammonia nitrogen bacterial classification, enter next loop cycle.Embodiment 2: the processing of sewage
Be example with certain county town town sanitary sewage disposal engineering, this programme handled low-temperature sewage ammonia nitrogen effect test.For comparing the utility model technique effect, compare test simultaneously.The contrast test place is selected in this county urban wastewater treatment firm.This factory owner's body adopts cyclic activated sludge system, and former water is based on the sanitary sewage in county town district.During the contrast test, former water pollutant concentration such as table 1.
Table 1: raw water quality index (mg/L of unit)
Project in the table, COD
CrBe the chemical oxygen demand that adopts potassium bichromate to measure as oxygenant; SS is suspension content; TN is total nitrogen; TP is total phosphorus.
CASS pond operating parameter is as follows: cycle of operation 6h, and the 1.5h of wherein intaking, the aeration while intaking, aeration 4h, precipitation 1h strains water 1h.Got warm again after a cold spell by weather influences, and the water temperature in the biochemistry pool raises in time gradually.Contrast test is all tested the treatment effect under this programme low temperature and the normal temperature condition.
Contrast test is chosen two identical sewage disposal unit.One of them processing unit is moved according to this programme, as test pool; Another processing unit is the pond in contrast.Each processing unit comprises a CASS pond.The CASS pond is divided into two portions along the water inlet direction, and front end is the oxygen-starved area, and the rear end is aerobic zone.The wide 20m in oxygen-starved area, depth of water 5m, volume 750m
3, in be provided with two submersible agitators; The wide 20m of aerobic zone, depth of water 5m, volume 4250m
3, in establish return sludge pump, residual sludge pump and strain each one of hydrophone, straining hydrophone, to strain outlet capacity be 1700m
3/ h.
The actication of culture apparatus main body is 1 plastic tank, and volume is 1m
3(1m*1m*1m), initially add 20 liters of ammonia nitrogen bacterial classifications are risen and add former water and be made into 2m
3Mud mixture once enters 2m in biochemistry pool
3Mud mixture; Be made into 0.5m with ammonia nitrogen bacterial classification 700ml every day in later stage
3Mud mixture adds biochemistry pool.Activating apparatus adopts efflux aerator that the mud mixture in the plastic tank is carried out aeration, mixing, and the actication of culture time is 24h.When activation stage finished, activating apparatus entered mud mixture in the CASS pond that is in the aeration state.
Contrast test begins the day before yesterday, and ammonia nitrogen actication of culture device is with 2m
3Activated spawn (mud mixture) enters the biochemistry pool aerobic zone.As calculated, the concentration of ammonia nitrogen bacterial classification is 4ml/m in the test biochemistry pool
3(biochemistry pool volume) meets the contrast test requirement.Because the ammonia nitrogen bacterial classification wears out, transports anoxic, the loss of minute quantity bacterial classification all can cause entering the interior ammonia nitrogen bacterial classification quantity of biochemistry pool and reduce, for stablizing ammonia nitrogen bacterial classification quantity in the biochemistry pool, during the contrast test, the actication of culture device is made into 0.5m with ammonia nitrogen bacterial classification 700ml every day in later stage
3Mud mixture adds the biochemistry pool aerobic zone.
Control group and test group are used same biochemistry pool, but control group does not add the ammonia nitrogen bacterial classification, are used for doing blank sample.
Biochemistry pool test group and control group intake simultaneously, simultaneously aeration, leave standstill simultaneously, draining simultaneously.Test group is all identical with the handled water yield of control group, water quality and blast volume.During the contrast test, two biochemistry pool sludge concentration controlling valus are identical.
The contrast test result
Contrast test continues 42 days.During the contrast test, weather gets warm again after a cold spell.Be subjected to weather effect, biochemistry pool aerobic section water temperature is increased to 17.8 ℃ gradually from 11.6 ℃.The results are shown in Figure 3.
Contrast test carried out first day, and test pool water outlet ammonia nitrogen concentration is 32.58mg/L, and contrast pond water outlet ammonia nitrogen concentration is 38.18mg/L, and test pool water outlet ammonia nitrogen concentration is than the low 5.6mg/L of contrast pond water outlet ammonia nitrogen concentration.At the contrast test initial stage, test pool namely shows the effect that reduces the water outlet ammonia nitrogen concentration.Second day, the water outlet ammonia nitrogen concentration of test pool was 24.85mg/L, and contrast pond water outlet ammonia nitrogen concentration is 33.6mg/L, and the water outlet ammonia nitrogen concentration of test pool is than the low 8.75mg/L of test pool.Test pool further manifests the processing advantage of ammonia nitrogen.From the 3rd day to the 17th day, the biochemistry pool water temperature was 11.3 ℃～13.6 ℃, and test pool water outlet ammonia nitrogen concentration hangs down about 8mg/L than contrast pond water outlet ammonia nitrogen concentration.
The 18th day, temperature was increased to 13.6 ℃, and test pool water outlet ammonia nitrogen concentration is 22.71mg/l, and contrast pond water outlet ammonia nitrogen concentration is 34.18mg/l, and test pool water outlet ammonia nitrogen concentration is than the low 11.47mg/l of contrast pond water outlet ammonia nitrogen concentration.From the 18th day to the 24th day, the biochemistry pool water temperature was 13.6 ℃～14.7 ℃, and test pool water outlet ammonia nitrogen concentration hangs down about 10mg/l than contrast pond water outlet ammonia nitrogen concentration.
The 25th day, temperature rose to 14.4 ℃, and test pool water outlet ammonia nitrogen concentration is 11.25mg/L, and contrast pond water outlet ammonia nitrogen concentration is 24.05mg/L, and test pool water outlet ammonia nitrogen concentration is than the low 11.8mg/L of contrast pond water outlet ammonia nitrogen concentration.From the 25th day to the 32nd day, the biochemistry pool water temperature was 14.4 ℃～15.7 ℃, and test pool water outlet ammonia nitrogen concentration hangs down about 12mg/L than contrast pond water outlet ammonia nitrogen concentration.
Along with contrast test carries out, ammonia nitrogen concentration is with descending gradually working time in the water outlet, move to the 33rd day, water temperature is increased to 16.6 ℃, test pool water outlet this moment ammonia nitrogen concentration is 9.12mg/L, contrast pond water outlet ammonia nitrogen concentration is 13.92mg/L, and both differ 4.8mg/L, and test pool and contrast pond water outlet ammonia nitrogen concentration difference are dwindled.Be speculated as the activation recovering of nitrifier in the contrast pond, cause the contrast pond that the ammonia nitrogen processing efficiency is improved, the water outlet ammonia nitrogen concentration significantly descends.From the 33rd day to the 40th day, the biochemistry pool water temperature changed between 16 ℃～17.8 ℃, and the difference of test pool water outlet ammonia nitrogen concentration and contrast pond water outlet ammonia nitrogen concentration fluctuates between 0.53～8mg/L, and after the 40th day, close to 0mg/L.
Can draw from contrast test, present method has positive effect to the low temperature city domestic sewage ammonia nitrogen of handling below 16 ℃, to sanitary sewage ammonia nitrogen treatment effect the best of 14.4 ℃～15.7 ℃.When temperature was increased to more than 16 ℃, because the activation recovering of nitrifier in the former biochemistry pool, present method was not obvious to the treatment effect of ammonia nitrogen.
Above embodiment is described preferred implementation of the present utility model; be not that scope of the present utility model is limited; under the prerequisite that does not break away from the utility model design spirit; various modification and improvement that the common engineering technical personnel in this area make the technical solution of the utility model all should fall in the definite protection domain of claims of the present utility model.
Claims (6)
1. a Sewage treatment systems comprises biochemistry pool, it is characterized in that, described biochemistry pool is divided into oxygen-starved area and aerobic zone, and oxygen-starved area and aerobic zone are separated by pool wall;
Described oxygen-starved area is provided with former water inlet and at least one stirrer;
Described aerobic zone is provided with aerator, strains hydrophone, activated spawn entrance, excess sludge outlet and water outlet;
Be provided with the returned sluge pipeline in the described biochemistry pool.
2. Sewage treatment systems as claimed in claim 1 is characterized in that, described biochemistry pool is outside equipped with the actication of culture device, and described actication of culture device is connected with the aerobic zone of biochemistry pool by pipeline.
3. Sewage treatment systems as claimed in claim 2 is characterized in that, described actication of culture device comprises container, efflux aerator.
4. as the arbitrary described Sewage treatment systems of claim 1-3, it is characterized in that described stirrer is 1-4.
5. as the arbitrary described Sewage treatment systems of claim 1-3, it is characterized in that, also be provided with return sludge pump on the pipeline of described returned sluge.
6. as the arbitrary described Sewage treatment systems of claim 1-3, it is characterized in that, also be provided with residual sludge pump in the described oxygen-starved area, described residual sludge pump and excess sludge pipe connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320110783 CN203159330U (en) | 2012-10-29 | 2013-03-12 | Sewage treatment system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220560234.8 | 2012-10-29 | ||
| CN201220560234 | 2012-10-29 | ||
| CN 201320110783 CN203159330U (en) | 2012-10-29 | 2013-03-12 | Sewage treatment system |
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| CN203159330U true CN203159330U (en) | 2013-08-28 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103787497A (en) * | 2012-10-29 | 2014-05-14 | 浦华环保有限公司 | Sewage treatment system and application thereof |
| CN103819000A (en) * | 2014-02-26 | 2014-05-28 | 北京首钢国际工程技术有限公司 | AO/SBR system and process for enhanced nitrogen removal |
-
2013
- 2013-03-12 CN CN 201320110783 patent/CN203159330U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103787497A (en) * | 2012-10-29 | 2014-05-14 | 浦华环保有限公司 | Sewage treatment system and application thereof |
| CN103787497B (en) * | 2012-10-29 | 2015-09-16 | 浦华环保有限公司 | A kind of Sewage treatment systems and application thereof |
| CN103819000A (en) * | 2014-02-26 | 2014-05-28 | 北京首钢国际工程技术有限公司 | AO/SBR system and process for enhanced nitrogen removal |
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Granted publication date: 20130828 |