CN103833131A - Deep sewage denitrification treatment equipment and deep sewage denitrification treatment method - Google Patents
Deep sewage denitrification treatment equipment and deep sewage denitrification treatment method Download PDFInfo
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- CN103833131A CN103833131A CN201410091440.2A CN201410091440A CN103833131A CN 103833131 A CN103833131 A CN 103833131A CN 201410091440 A CN201410091440 A CN 201410091440A CN 103833131 A CN103833131 A CN 103833131A
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Abstract
The invention discloses deep sewage denitrification treatment equipment comprising a water inflow system, a carbon source adding system, a denitrification reactor and a clean water pool, wherein the denitrification reactor at least comprises a premixing layer, a suspension packing layer, a sand filtering layer and a clear water layer in sequence from bottom to top or from top to bottom, the water inflow system and the carbon source adding system both are communicated with the premixing layer, and the clear water layer is communicated with the clear water pool. The invention further discloses a corresponding deep sewage denitrification treatment method. The deep sewage denitrification treatment equipment and deep sewage denitrification method disclosed by the invention not only have high denitrification efficiency and good effect, but also can be used for significantly reducing the turbidity of effluent.
Description
Technical field
The present invention relates to sewage treatment area, particularly a kind of sewage denitrification advanced nitrogen treatment facility and treatment process.
Background technology
In sewage effluent, nitrogen phosphorus is the important nutrient that causes body eutrophication.Along with being on the rise of Chinese water body eutrophication problem, and the lifting of following sewage drainage standard, the stable sewage water intensification denitrification dephosphorization technique of research and development economical and efficient, has become the technical need that sewage treatment area is badly in need of.
Current sewage disposal faces high standard emission request, and Effluent criteria TN as national in the U.S., Canada etc. is less than 3mg/L and TP is less than 0.18mg/L.Nitrogen in sewage is mainly removed by nitration denitrification process, and wherein denitrification needs organic carbon source etc. as electron donor, and using nitric nitrogen as electron acceptor(EA), denitrification nitric nitrogen is nitrogen, reaches the object of removing nitrogen in sewage.A lot of sewage works are faced with into water organic carbon source concentration low, are not enough to support the carrying out of effective denitrification denitrogenation.So sewage treatment process upgrading need to add external source carbon source, enhanced sewage denitrification denitrogenation in secondary treatment process or in advanced treatment process.Secondary effluent is carried out to advanced nitrogen processing, is the strengthened denitrification strategy of widespread use, and the technique adopting comprises biological filter, suspended filler biofilm technique and fluidized bed bio membrane process etc.Wherein, suspended filler biofilm technique is in reactor, to add the filler of a certain amount of density close to water, for microbial growth provides habitat, will improve biomass and biological species in reactor, and then improves the processing efficiency of reactor.Suspended filler biofilm denitrification denitrogenation technique has the features such as processing efficiency is high, denitrification effect good, simple to operate, in advanced treatment of wastewater, is widely used.But only adopt floating stuffing to carry out denitrification, water outlet contains higher concentration particulate matter and suspended matter, causes higher turbidity.Larger because of packing densities such as sandstones in tradition sand filtration denitrification denitrogenation technique, so filling ratio is lower relatively, to reactor effective rate of utilization also corresponding reduction; , in process operation process, easily result in blockage meanwhile, be unfavorable for process operation.
Summary of the invention
Main purpose of the present invention is to provide a kind of sewage denitrification advanced nitrogen treatment facility and treatment process, has both had advantages of that nitric efficiency was high, effective, can significantly reduce again delivery turbidity.
For achieving the above object, the present invention is by the following technical solutions:
A kind of sewage denitrification advanced nitrogen treatment facility, comprise water inlet system, carbon source dosing system, denitrification denitrogenation reactor and clean water basin, described denitrification denitrogenation reactor at least comprises premix layer, floating stuffing layer, sand filter blanket and clear water layer successively to Huo Cong top, top to bottom from bottom, described water inlet system and described carbon source dosing system are communicated with described premix layer, and described clear water layer is communicated with described clean water basin.
Preferably, described sand filter blanket comprises supporting layer and be positioned at the sand filtration bed of material on described supporting layer, and preferred, described supporting layer and the described sand filtration bed of material are that 10-20cm is thick separately.
Preferably, also comprise water and/or gas from bottom to top by described denitrification denitrogenation reactor to remove reactor the back-purge system of the suspended particulate matter in filler especially.
Preferably, the filling ratio of described floating stuffing layer is below 70%.
Preferably, described back-purge system comprises the backwash pump that the water in described clean water basin is carried to bottom to the top of described denitrification denitrogenation reactor, and the back flushing air pump that gas is carried to bottom to the top of described denitrification denitrogenation reactor, preferred, between described backwash pump and described denitrification denitrogenation reactor, be provided with vacuum breaker between described back flushing air pump and described denitrification denitrogenation reactor.
Preferably, described denitrification denitrogenation reactor is be provided with thief hole columnar structured.
Preferably, between described premix layer and described floating stuffing layer, be provided with perforate dividing plate, in order to tackle floating stuffing.
Preferably, described water inlet system and described carbon source dosing system comprise peristaltic pump separately.
Preferably, on the pipeline of the logical described clean water basin of described clear water layer, be provided with outlet valve.
A kind of sewage denitrification deepness denitrogenation method for treating, adopts described sewage denitrification advanced nitrogen treatment facility, and described method comprises:
By described water inlet system and described carbon source dosing system, pending water is mixed at the described premix layer of the bottom/top of described denitrification denitrogenation reactor with carbon source, remove suspended particulate matter in water through denitrification processing and the described sand filter blanket of described floating stuffing layer and described sand filter blanket successively again, the clear water obtaining enters the described clear water layer of the top/bottom of reactor, then is drained in described clean water basin by described clear water layer.
Preferably, at least according to the water inlet detecting and/or the nitrate nitrogen concentration of water outlet, regulate the dosage flow velocity of described carbon source dosing system.
A kind of sewage denitrification deepness denitrogenation method for treating, adopts the described sewage denitrification advanced nitrogen treatment facility that comprises described back-purge system, and described method comprises:
Sewage treatment process, close described back-purge system, by described water inlet system and described carbon source dosing system, pending water is mixed at the described premix layer of the bottom/top of described denitrification denitrogenation reactor with carbon source, remove suspended particulate matter in water through denitrification processing and the described sand filter blanket of described floating stuffing layer and described sand filter blanket successively again, the clear water obtaining enters the described clear water layer of the end top/bottom of reactor, then is drained in described clean water basin by described clear water layer;
Backwash process, close described water inlet system and described carbon source dosing system, and in the position of the water outlet of the logical described clean water basin of described clear water layer the position lower than back flushing water outlet, close the outlet valve of the logical described clean water basin of described clear water layer, then by water and/or gas from bottom to top by described denitrification denitrogenation reactor to remove reactor the suspended particulate matter in filler especially
Preferably, at least control backwashing period and time according to head loss and/or change in flow situation.
Useful technique effect of the present invention:
By the design of premix layer, floating stuffing layer, sand filter blanket and clear water layer is at least set to Huo Cong top, top to bottom successively from bottom, the present invention not only has that the processing efficiency that traditional suspended filler biofilm denitrification denitrogenation technique has is high, denitrification effect good, simple operation and other advantages, the sand filtration that is also used for denitrification denitrogenation by script has effectively been removed floating stuffing at the suspended particulate matter of processing water and producing, and has significantly improved water clarification degree.Compared with the technique of traditional use sand filtration denitrogenation, the relatively less sand filter blanket of the present invention is also difficult for resulting in blockage.
In a preferred embodiment, after having implemented sewage disposal, carry out back flushing by back-purge system, can fully remove in reactor suspended particle in filler especially etc., avoid suspended particle etc. to cause that head loss increases or causes filter clogging.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of specific embodiment of sewage denitrification advanced nitrogen treatment facility of the present invention;
Fig. 2 is the structural representation of the another kind of specific embodiment of sewage denitrification advanced nitrogen treatment facility of the present invention.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are elaborated.Should be emphasized that, following explanation is only exemplary, rather than in order to limit the scope of the invention and to apply.
Consult Fig. 1 and Fig. 2, according to embodiments of the invention, sewage denitrification advanced nitrogen treatment facility comprises water inlet system, carbon source dosing system, denitrification denitrogenation reactor (or claiming biofilm system) and clean water basin, described denitrification denitrogenation reactor at least comprises premix layer, floating stuffing layer, sand filter blanket and clear water layer successively from bottom to top, or described denitrification denitrogenation reactor at least comprises premix layer, floating stuffing layer, sand filter blanket and clear water layer successively from top to bottom.Described water inlet system and described carbon source dosing system are all communicated with described premix layer at bottom or the top of denitrification denitrogenation reactor, and described clear water layer is communicated with described clean water basin.
In preferred embodiment, sewage denitrification advanced nitrogen treatment facility comprises and also comprises back-purge system, this back-purge system is used for water and/or gas from bottom to top by described denitrification denitrogenation reactor removing reactor, the suspended particulate matter in floating stuffing especially, thereby avoids suspended particle etc. to cause that head loss increases or causes filter clogging.
According to the above-mentioned difference configuration to top from bottom, denitrification denitrogenation reactor is corresponding can be designed as two kinds of patterns: upward flow pattern and lower to stream mode.Two kinds of patterns can be designed to cylindrical structural.For upward flow pattern, orlop is premix layer (water distribution uniformity region); Then be floating stuffing layer, its filling ratio is preferably controlled at below 70%, to realize in good mix and blend effect of back flushing stage; Then above for sand filter blanket comprises supporting layer (preferably 10-20cm) and the sand filtration bed of material (preferably 10-20cm); Be topmost clear water layer, preferably 2 of sand filter blanket times of height.For lower, to stream mode, the superiors are premix layer (water distribution uniformity region); Then be preferably controlled at below 70% for its filling ratio of floating stuffing layer, to realize in good mix and blend effect of back flushing stage; Then below for sand filter blanket comprises supporting layer (preferably 10-20cm) and the sand filtration bed of material (preferably 10-20cm); Bottom is clear water layer.Under two kinds of patterns, the whole reactor high with respect to 3-6m, floating stuffing layer preferably accounts for approximately 80% height.
Required secondary effluent to be processed can pump in biomembrane process by intake pump.Flooding velocity can mainly design according to art breading load, considers filtering velocity problem simultaneously.
Carbon source dosing system can be to be mainly made up of automation control system, by automatic control program control.Carbon source dosing system can comprise the electrodes such as online nitrate nitrogen and SS, and water inlet and/or water outlet nitrate nitrogen concentration are detected, and regulates dosage flow velocity.
Back-purge system can mainly be controlled backwashing period and time according to head loss and/or change in flow situation.
Consult Fig. 1, in a kind of specific embodiment, sewage denitrification denitrogenation processing equipment comprises: water inlet peristaltic pump 1, enter medicine peristaltic pump 2, carbon source bin 3, premix layer 4, dividing plate 5, floating stuffing layer 6, thief hole 7, supporting layer 8, quartz sand layer 9, the Graceful mouth of a river 10, back flushing water outlet 11, backwash pump 12, back flushing air pump 13, controller 14, vacuum breaker 15, clean water basin 16.
Adopt upward flow pattern according to the sewage treatment process of the present embodiment.Sewage Plant secondary effluent enters reactor by intake pump from bottom, adopt volume pump to add required carbon source from bottom simultaneously, both fully mix at bottom premix layer, then enter floating stuffing layer above (its above premix layer in suspended state), there is anti-nitration reaction to remove nitrate nitrogen, sewage after treatment is further removed suspended particulate matter through supporting layer and quartz sand layer, and the clear water finally obtaining drains into clean water basin through clear water layer from reactor.Back flushing be can also carry out, backwashing period and time determined according to flow velocity reduction and/or head loss.When back flushing, open backwash pump and back flushing air pump, below reactor, intake gentle, in reactor especially the suspended particle in filler etc. fully remove.In backwash process, water inlet peristaltic pump and enter medicine peristaltic pump and close.After back flushing, restart and start to dispose of sewage.Volume pump flow velocity can be adjusted according to the nitrate nitrogen concentration of electrode detection.
Consult Fig. 2, in another kind of specific embodiment, sewage denitrification denitrogenation processing equipment comprises: intake pump 1, enter medicine peristaltic pump 2, water-in 3, feeding opening 4, carbon source bin 5, backwash pump 6, back flushing air pump 7, the Graceful mouth of a river 8, outlet valve 9, clear water layer 10, supporting layer 11, quartz sand layer 12, dividing plate 13, floating stuffing layer 14, thief hole 15, back flushing water port 16, water outlet 17, exhaust-valve 18, vacuum breaker 19, controller 20.
Under adopting according to the sewage treatment process of the present embodiment to stream mode.Sewage Plant secondary effluent enters reactor by intake pump from top, adopt volume pump to add required carbon source from top simultaneously, both fully mix at top premix layer, then enter floating stuffing layer below (its below premix layer in suspended state), there is anti-nitration reaction to remove nitrate nitrogen, sewage after treatment down flows to quartz sand layer and supporting layer is further removed suspended particulate matter, and the clear water finally obtaining drains into clean water basin by U-shaped pipe from reactor through clear water layer.Back flushing be can also carry out, backwashing period and time determined according to flow velocity reduction and/or head loss.When back flushing, open backwash pump and back flushing air pump, gentle from bottom water inlet, in reactor especially the suspended particle in filler etc. fully remove.In backwash process, water inlet and carbon source add pump and close, and outlet valve is closed simultaneously, avoids backwashing water to discharge by water shoot.After back flushing, restart intake pump and enter carbon source pump, starting to dispose of sewage.Volume pump flow velocity is adjusted according to the nitrate nitrogen concentration of electrode detection.
Controller shown in Fig. 1-Fig. 2 has multiple, and number is only that schematically actual quantity can be less than illustrated number or only have a controller, adopts common control system control technological process.
Through contrast experiment's checking, in the time only adopting traditional floating stuffing, delivery turbidity is between 10-50NTU; And the employing embodiment of the present invention, delivery turbidity is generally lower than 2.5NTU.To NO
3-N is that secondary effluent and the empty bed time of 12.4mg/L is under 15min condition, by embodiment of the present invention processing, and water outlet NO
3-N concentration reaches 4.1mg/L, and clearance reaches 70%.Experimental result demonstrates the present invention and has higher denitrification and filtering function.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1. a sewage denitrification advanced nitrogen treatment facility, it is characterized in that, comprise water inlet system, carbon source dosing system, denitrification denitrogenation reactor and clean water basin, described denitrification denitrogenation reactor at least comprises premix layer, floating stuffing layer, sand filter blanket and clear water layer successively to Huo Cong top, top to bottom from bottom, described water inlet system and described carbon source dosing system are all communicated with described premix layer, and described clear water layer is communicated with described clean water basin.
2. sewage denitrification advanced nitrogen treatment facility as claimed in claim 1, is characterized in that, described sand filter blanket comprises supporting layer and be positioned at the sand filtration bed of material on described supporting layer, and preferred, described supporting layer and the described sand filtration bed of material are that 10-20cm is thick separately.
3. sewage denitrification advanced nitrogen treatment facility as claimed in claim 1 or 2, it is characterized in that, also comprise water and/or gas from bottom to top by described denitrification denitrogenation reactor to remove reactor the back-purge system of the suspended particulate matter in filler especially.
4. sewage denitrification denitrogenation processing equipment as claimed in claim 3, is characterized in that, the filling ratio of described floating stuffing layer is below 70%.
5. sewage denitrification advanced nitrogen treatment facility as claimed in claim 3, it is characterized in that, described back-purge system comprises the backwash pump that the water in described clean water basin is carried to bottom to the top of described denitrification denitrogenation reactor, and the back flushing air pump that gas is carried to bottom to the top of described denitrification denitrogenation reactor, preferably, between described backwash pump and described denitrification denitrogenation reactor, between described back flushing air pump and described denitrification denitrogenation reactor, be provided with vacuum breaker.
6. the sewage denitrification advanced nitrogen treatment facility as described in claim 1 to 5 any one, is characterized in that, described denitrification denitrogenation reactor is be provided with thief hole columnar structured.
7. the sewage denitrification advanced nitrogen treatment facility as described in claim 1 to 5 any one, is characterized in that, between described premix layer and described floating stuffing layer, is provided with perforate dividing plate.
8. the sewage denitrification advanced nitrogen treatment facility as described in claim 3 to 5 any one, it is characterized in that, the water outlet position of the logical described clean water basin of described clear water layer, lower than the position of back flushing water outlet, is provided with outlet valve on the pipeline of the logical described clean water basin of described clear water layer.
9. a sewage denitrification deepness denitrogenation method for treating, adopts the sewage denitrification advanced nitrogen treatment facility as described in claim 1 to 8 any one, and described method is characterised in that, comprising:
By described water inlet system and described carbon source dosing system, pending water is mixed at the described premix layer of the bottom/top of described denitrification denitrogenation reactor with carbon source, remove suspended particulate matter in water through denitrification processing and the described sand filter blanket of described floating stuffing layer and described sand filter blanket successively again, the clear water obtaining enters the described clear water layer of the top/bottom of reactor, drained in described clean water basin by described clear water layer again
Preferably, at least according to the water inlet detecting and/or the nitrate nitrogen concentration of water outlet, regulate the dosage flow velocity of described carbon source dosing system.
10. a sewage denitrification deepness denitrogenation method for treating, adopts the sewage denitrification advanced nitrogen treatment facility as described in claim 3 to 8 any one, and described method is characterised in that, comprising:
Sewage treatment process, close described back-purge system, by described water inlet system and described carbon source dosing system, pending water is mixed at the described premix layer of the bottom/top of described denitrification denitrogenation reactor with carbon source, remove suspended particulate matter in water through denitrification processing and the described sand filter blanket of described floating stuffing layer and described sand filter blanket successively again, the clear water obtaining enters the described clear water layer of the end top/bottom of reactor, then is drained in described clean water basin by described clear water layer;
Backwash process, close described water inlet system and described carbon source dosing system, and in the water outlet position of the logical described clean water basin of described clear water layer the position lower than back flushing water outlet, close the outlet valve of the logical described clean water basin of described clear water layer, then by water and/or gas from bottom to top by described denitrification denitrogenation reactor to remove reactor the suspended particulate matter in filler especially
Preferably, at least control backwashing period and time according to head loss and/or change in flow situation.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106647829A (en) * | 2016-12-02 | 2017-05-10 | 江苏川源环保设备有限公司 | System and method for controlling water head loss |
| CN106673191A (en) * | 2016-12-23 | 2017-05-17 | 江苏川源环保设备有限公司 | Method and system for releasing gas in denitrification deep bed filter |
| CN107082490A (en) * | 2017-05-05 | 2017-08-22 | 华南理工大学 | The method of its processing sewage of streaming denitrogenation dephosphorizing expanded bed biofilter and application drops |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106647829A (en) * | 2016-12-02 | 2017-05-10 | 江苏川源环保设备有限公司 | System and method for controlling water head loss |
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| CN107082490A (en) * | 2017-05-05 | 2017-08-22 | 华南理工大学 | The method of its processing sewage of streaming denitrogenation dephosphorizing expanded bed biofilter and application drops |
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