CN102249500A - Combined device for deeply purifying tail water of urban sewage treatment plant and operation method - Google Patents
Combined device for deeply purifying tail water of urban sewage treatment plant and operation method Download PDFInfo
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- CN102249500A CN102249500A CN2011101981824A CN201110198182A CN102249500A CN 102249500 A CN102249500 A CN 102249500A CN 2011101981824 A CN2011101981824 A CN 2011101981824A CN 201110198182 A CN201110198182 A CN 201110198182A CN 102249500 A CN102249500 A CN 102249500A
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Abstract
The invention discloses a combined device for deeply purifying tail water of an urban sewage treatment plant and an operation method, belonging to the technical field of sewage treatment. The device is composed of an intermittent aeration activated carbon biofilter and a three-dimensional S-shaped channel plant floating bed, wherein the intermittent aeration activated carbon biofilter successively comprises a water inlet tube, a biological activated carbon layer, a graded gracel layer, a water outlet tube, an aeration tube and the like from top to bottom; the three-dimensional S-shaped channel plant floating bed is composed of an upper layer of S-shaped channel and a lower layer of S-shaped channel; because the plant floating bed is made of buckle plates with holes, the plant floating bed is convenient to install and good for the growth of plant roots; the intermittent aeration activated carbon biofilter can be utilized to trap and decompose solid suspended matters and organic matters in tail water, and nutrient matters can be partially removed; and the three-dimensional S-shaped channel plant floating bed can further adsorb nutrient matters in the tail water. In the combined device, different filter materials and plant floating bed materials can be replaced according to the water quality characteristic of sewage and regeneration reuse requirements, and the combined device is flexible to operate and can purify various contaminated water bodies.
Description
Technical field
The present invention relates to a kind of waste disposal plant, particularly a kind of associated plant at municipal sewage plant's deep purification of tail water.
Background technology
Under the short day by day background of current water resources, reusing sewage has become the important channel that solves shortage of water resources, and obtains extensive concern in various countries.Urban wastewater is as stable water source, if according to tail water feature advanced treatment in addition, and as carrying out reuse in the secondary water source in city, certainly will can alleviate the water crises problem that the many cities of present China are faced.But the processing of urban wastewater at present also exists following problem to need to be resolved hurrily.At first, existing urban wastewater advanced treatment process mainly comprise the filtrate physical filtering, but effluent quality is relatively poor; Utilize chemical precipitation or oxygenant oxidation method to be easy to generate secondary pollution, and expense is higher relatively, at present most of advanced treatment factory all is difficult to keep long-time running; The simple ultrafiltration membrane technique that adopts is limited to small molecular weight organism and nutritive salt removal effect, though nanofiltration and reverse osmosis can reach very high decontamination effect improving, it is high that but mould control requires, energy consumption is also than higher, because of film blocks and pollution easily, pre-treatment is required sternly to be not easy to maintenance management, therefore be unsuitable for the urban wastewater advanced treatment.Secondly, owing to contain multiple composition pollutent simultaneously in the urban wastewater, rely on above-mentioned single treatment process can not guarantee that high-quality water outlet is arranged.
Summary of the invention
The purpose of this invention is to provide a kind of rational in infrastructure, processing cost is low, effective, safeguard simple municipal sewage plant deep purification of tail water device and working method.
Apparatus of the present invention are by intermittent aeration gac biological filter and plant floating bed the constituting of three-dimensional S type raceway groove, and described intermittent aeration gac biological filter is connected by the plant floating bed top-layer channel of rising pipe and described three-dimensional S type raceway groove.
Described intermittent aeration gac biological filter comprises water inlet pipe, overflow evacuated tube, intermittent aeration pipe, backwash tube, rising pipe, active carbon filler layer and supporting layer, biological activated carbon layer and supporting layer layout setting upper strata, three sieve plates in middle layer and lower floor.
Described supporting layer is filled the gravel of particle diameter 1-3cm, and the granulated active carbon of particle diameter 1-3mm is filled in the gac biological filter.
The aperture of described upper strata and middle layer sieve plate is less than 1mm, can stop during backwash that particle flows out in the biological activated carbon layer, can also stop that into the macrobead suspended matter enters the biological activated carbon layer in the water.
The aperture of described lower floor sieve plate is 2-3mm.
Described three-dimensional S type raceway groove is plant floating bed to be made up of upper strata S type raceway groove, the S of lower floor type raceway groove, water outlet pipe connecting and three-dimensional S type raceway groove support.
The interior plantation of the levels S type raceway groove rye grass that described three-dimensional S type raceway groove is plant floating bed.With buckle with holes plant is fixed in the described three-dimensional S type raceway groove.
The working method of municipal sewage plant's deep purification of tail water associated plant, comprise the steps: that urban wastewater enters intermittent aeration gac biological filter by the water inlet pipe that is installed in top, start the intermittent aeration device according to tail water water quality situation, carry out intermittent aeration from the bottom, filter tank.Tail water directly enters three-dimensional S type botanical system raceway groove top from the bottom in filter tank by pipe connection through supporting layer through the biological filtering layer of gac, enter the S of lower floor type raceway groove through water outlet after the twice floating beds system handles, pass through water outlet after the plant floating bed system handles of lower floor's twice equally again.
Urban wastewater enters intermittent aeration gac biological filter by the water inlet pipe that is installed in top, carries out intermittent aeration from the bottom, filter tank, is beneficial to microorganism with the concentration of dissolved oxygen in the control filter tank and realizes synchronous nitration and denitrification denitrogenation effect in the biological filter.Pollutent can be by the charcoal absorption crown_interception in the urban wastewater, and is attached to absorption, conversion, degraded that microbial film in activated carbon surface and the hole is finished pollutent, and realizes denitrification process at local anaerobic zone.
Beneficial effect:
The present invention has utilized intermittent aeration gac biological filter and three-dimensional plant floating bed system in combination.Utilize this combined system can play the purpose that different pollutents are removed step by step.Utilize intermittent aeration gac biological filter to play and hold back Decomposition, can partly remove nutritive substance simultaneously, and, be convenient to maintenance management because its floor space is little is fit to build in the factory to the suspended solid in the tail water and organism.Because the carbon source deficiency in the urban wastewater, need control dissolved oxygen concentration in the filter tank by the mode of intermittent aeration, can realize microorganism synchronous nitration and denitrification.Behind the intermittent aeration biological filter, do not have removed nutritive substance, can further absorb pollutent wherein, guarantee to have high-quality effluent quality by the botanical system that is fit to be based upon outside the factory.Plant can absorb the ammonia-state nitrogen in the urban wastewater, nutritive substances such as nitric nitrogen and deliquescent phosphoric acid salt.The plant of results can also be in order to realize producing biogas, as livestock herbage, resource utilization processes such as greening vegetation.
In sum, it is good that the present invention has a treatment effect, floor space is little, easy to maintenance, processing cost is low, non-secondary pollution, but characteristics such as resource utilization, can also require to change different filtrate and plant floating bed material according to the water quality characteristic and the regeneration of sewage, thereby have flexible operation, be convenient to the characteristics that multiple polluted-water is purified.
Description of drawings
The present invention is further detailed explanation below in conjunction with accompanying drawing.
Fig. 1 is an intermittent aeration gac biological filter vertical profile synoptic diagram;
Fig. 2 is the plant floating bed vertical profile synoptic diagram of three-dimensional S type raceway groove.
Embodiment
Urban wastewater deep purifying combined system has comprised intermittent aeration gac biological filter (Fig. 1) and three-dimensional S type raceway groove plant floating bed (Fig. 2).Legend discontinuous aeration gac biological filter 6 is made up of water inlet pipe 1, overflow evacuated tube 2, intermittent aeration pipe 3, backwash tube 4, rising pipe 5, active carbon filler layer 7 and supporting layer 8; supporting layer 8 is filled the gravel of particle diameter 1-3cm; active carbon filler layer 7 is filled the granulated active carbon of particle diameter 1-3mm, three sieve plates 10 of the layout setting between active carbon layer 7 and the supporting layer 8.The superiors and middle layer screen panel aperture be less than 1mm, can stop during back flushing that particle flows out in 7, can also stop to enter that the macrobead suspended matter enters 7 in the water.The lower screen panel aperture is 2-3mm.Sewage treatment plant tail water enters the biological filtering layer 7 of intermittent aeration gac by the water inlet pipe 1 of 6 tops, intermittent aeration gac biological filter, through hold back, cleaning actions such as absorption, oxygenolysis remove pollutant in water, can regulate dissolved oxygen concentration according to the water quality condition intermittent aeration.Can the rye grass fixed race be implanted in the plant floating bed raceway groove 11,12 of three-dimensional S type raceway groove with buckle with holes.Water after the processing enters the plant floating bed upper strata S type raceway groove 11 of three-dimensional S type raceway groove through rising pipe 5, enters the S of lower floor type raceway groove 12 through water outlet pipe connecting 13, nutritive substances such as nitrogen in the removal water and phosphorus, and treat effluent is discharged by rising pipe.14 is three-dimensional S type raceway groove support.
Example 1:
Enforcement is carried out the deep purifying processing to town B-grade sewage treatment plant tail water, and its effluent quality reaches urban wastewater treatment firm pollutant emission secondary standard.Main water-quality guideline parameter is: total nitrogen concentration is 28～40mg/L, and total phosphorus concentration is 2.5～3mg/L, and COD concentration is 60～80mg/L, and SS concentration is 25～30mg/L.
The aeration rate that this tail water is carried out adjusting intermittent aeration gac biological filter in the advanced treatment process remains on 4L/h, and aeration period stops 45min for aeration 15min/, and hydraulic detention time is 4h; Mean flow rate is 2L/min; The plant floating bed mean residence time of three-dimensional S type raceway groove is 5 days; Device moves normally in the entire treatment process, and the biological filter does not have latch up phenomenon, and the floating bed plant growth is normal.
Result shows: during steady running, this urban wastewater is after associated plant advanced treatment of the present invention, and effluent quality is as follows: total nitrogen concentration is less than 1.5mg/L, and total phosphorus concentration is less than 0.3mg/L, and COD is less than 8mg/L, and SS is less than 0.2mg/L.Each index effluent quality is better than " water environment quality standard " (GB3838-2002) IV class water quality standard.
Example 2:
Enforcement is handled town B-grade sewage treatment plant tail water, its effluent quality reaches urban wastewater treatment firm pollutant emission one-level B standard, and main water-quality guideline: total nitrogen concentration is 15～20mg/L, and total phosphorus concentration is 1～1.5mg/L, COD is 50～60mg/L, and SS is 10～20mg/L.
The intermittent aeration amount of implementing this deep purification of tail water treating processes discontinuous aeration gac biological filter remains on 2L/h, and aeration period stops 1h for aeration 10min/, and hydraulic detention time is 2h.Mean flow rate is 4L/min, and the plant floating bed mean residence time of three-dimensional S type raceway groove is 5 days; Device moves normally in the entire treatment process, and the biological filter does not have latch up phenomenon, and the floating bed plant growth is normal.
Urban wastewater is after associated plant deep purifying of the present invention is handled, and its effluent quality total nitrogen concentration is less than 1mg/L, and total phosphorus concentration has reached below the 0.2mg/L, and COD drops to below the 5mg/L, and SS is below the 0.04mg/L.Effluent quality is better than " water environment quality standard " (GB3838-2002) III class water quality standard.
Claims (8)
1. municipal sewage plant's deep purification of tail water associated plant, by intermittent aeration gac biological filter and plant floating bed the constituting of three-dimensional S type raceway groove, it is characterized in that it is plant floating bed that intermittent aeration gac biological filter connects three-dimensional S type raceway groove by rising pipe.
2. municipal sewage plant as claimed in claim 1 deep purification of tail water associated plant, it is characterized in that, intermittent aeration gac biological filter comprises water inlet pipe, overflow evacuated tube, intermittent aeration pipe, backwash tube, rising pipe, active carbon filler layer and supporting layer, biological activated carbon layer and supporting layer layout setting upper strata, three sieve plates in middle layer and lower floor.
3. municipal sewage plant as claimed in claim 2 deep purification of tail water associated plant is characterized in that, it is the gravel of 1-2cm that described supporting layer is filled particle diameter, and it is the granulated active carbon of 1-3mm that described biological activated carbon layer is filled particle diameter.
4. municipal sewage plant as claimed in claim 2 deep purification of tail water associated plant is characterized in that, the aperture of described upper strata and middle layer sieve plate is below 1mm, and the aperture of described lower floor sieve plate is 2-3mm.
5. municipal sewage plant as claimed in claim 1 deep purification of tail water associated plant is characterized in that, described three-dimensional S type raceway groove is plant floating bed to be made up of upper strata S type raceway groove, the S of lower floor type raceway groove, water outlet pipe connecting and three-dimensional S type raceway groove support.
6. as claim 1 or 5 described municipal sewage plant deep purification of tail water associated plants, it is characterized in that the plant floating bed plantation of described three-dimensional S type raceway groove rye grass.
7. as claim 1 or 5 described municipal sewage plant deep purification of tail water associated plants, it is characterized in that, plant is fixed in the described three-dimensional S type raceway groove with buckle with holes.
8. the working method of municipal sewage plant as claimed in claim 1 deep purification of tail water associated plant, comprise the steps: that urban wastewater enters intermittent aeration gac biological filter by the water inlet pipe that is installed in top, start the intermittent aeration device according to tail water water quality situation, carry out intermittent aeration from the bottom, filter tank; Tail water directly enters three-dimensional S type botanical system raceway groove top from the bottom in filter tank by pipe connection through supporting layer through the biological filtering layer of gac, enter the S of lower floor type raceway groove through water outlet after the twice floating beds system handles, pass through water outlet after the plant floating bed system handles of lower floor's twice equally again.
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| CN2011101981824A CN102249500A (en) | 2011-07-15 | 2011-07-15 | Combined device for deeply purifying tail water of urban sewage treatment plant and operation method |
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| CN2011101981824A CN102249500A (en) | 2011-07-15 | 2011-07-15 | Combined device for deeply purifying tail water of urban sewage treatment plant and operation method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104150717A (en) * | 2014-08-22 | 2014-11-19 | 同济大学 | Ozone-biological activated carbon combined water treatment simulation experimental device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201850201U (en) * | 2010-11-11 | 2011-06-01 | 深圳市立雅水务发展有限公司 | Assembly system for sewage advanced treatment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201850201U (en) * | 2010-11-11 | 2011-06-01 | 深圳市立雅水务发展有限公司 | Assembly system for sewage advanced treatment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104150717A (en) * | 2014-08-22 | 2014-11-19 | 同济大学 | Ozone-biological activated carbon combined water treatment simulation experimental device |
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Application publication date: 20111123 |