CN101985383A - Improved four-ditch type oxidation ditch and sewage treatment method thereof - Google Patents
Improved four-ditch type oxidation ditch and sewage treatment method thereof Download PDFInfo
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- CN101985383A CN101985383A CN 201010566214 CN201010566214A CN101985383A CN 101985383 A CN101985383 A CN 101985383A CN 201010566214 CN201010566214 CN 201010566214 CN 201010566214 A CN201010566214 A CN 201010566214A CN 101985383 A CN101985383 A CN 101985383A
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Abstract
The invention relates to an improved four-ditch type oxidation ditch comprising a four-ditch type oxidation ditch, wherein the four-ditch type oxidation ditch comprises four oxidation ditches; each oxidation ditch is provided with aeration equipment; communication holes for communicating the two adjacent oxidation ditches are reserved on the public pond walls among the four oxidation ditches. The invention is characterized in that anaerobic ponds are arranged in the front of the four-ditch type oxidation ditch; the anaerobic ponds are respectively connected with the corresponding four oxidation ditches through four control valves; and the sludge in the side ditches for precipitation of the four-ditch type oxidation ditch reflows to the anaerobic ponds through a sludge reflux pump. Based on the improved four-ditch type oxidation ditch, the invention provides a sewage treatment method of the improved four-ditch type oxidation ditch. The improved four-ditch type oxidation ditch and the sewage treatment method thereof can enhance the efficiency of biological dephosphorization and denitrification, enhance the utilization rate of the equipment, reduce energy consumption and save investment and operation cost.
Description
Technical field
The present invention relates to a kind of modified version four-channel type oxidation channel and sewage water treatment method thereof, belong to sewage treatment area.
Background technology
The alternative expression oxidation ditch is meant in a ditch or many ditches in chronological order spatially to the transposition of making adjustment of the aeration operation of oxidation ditch and precipitation operation, to obtain treatment effect the best or requirement.Be characterized in that second pond is not established in oxidation ditch aeration, alternately crop rotation of precipitation.Base type has: four kinds on A, VR, D and T type have four-channel type oxidation channel etc. in addition.
A type oxidation ditch is single ditch alternation formula oxidation ditch, is mainly used in the removal of BOD and nitrated, and is limited to less processing applications, and the length of each time length working hour is to the cycle of depending on the sewage intermittently discharged.
VR type oxidation ditch also is single ditch alternation formula oxidation ditch, main also is to be used for the removal of BOD and nitrated, be characterized in oxidation ditch is divided into two portions that volume equates substantially, utilize and regularly change the sense of rotation of changeing brush, change water (flow) direction in the ditch, make two portions oxidation ditch alternately as aeration zone and settling region, do not establish second pond, need not establish the mud reflux.
D type oxidation ditch is two ditch alternation formula oxidation ditches, generally holds identical two oxidation ditches by the pond and seizes, and two ditches connects alternately as aeration tank and settling tank, and main also is to be used for the removal of BOD and nitrated.D type processing power is between 1500～20000 population equivalents, but the theoretical utilization ratio of changeing brush 37.5% is the maximum characteristics of this system only.
T type oxidation ditch is three ditch alternation formula oxidation ditch systems.This system waits the oxygen flower ditch of capacity to set up together as a unit operation by 3, be communicated with in pairs mutually between 3 oxidation ditches, the both sides oxidation ditch plays aeration and precipitation dual function, the intermediary oxidation ditch carries out aeration all the time, do not establish second pond and mud reflux, have the function of removing BOD and nitrated denitrogenation, it changes brush practical efficiency theoretical value and reaches 58%.
Four-channel type oxidation channel is formed a sewage disposal unit by 4 oxidation ditches, all be provided with aerator in each ditch, be communicated with in pairs mutually between 4 ditches, the both sides oxidation ditch plays aeration and precipitation dual function, do not establish second pond and mud reflux, have the function of removing BOD and nitrated denitrogenation, the capacity utilization theoretical value brings up to 69%.
Though traditional alternative expression oxidation ditch has many advantages, but exist some to influence the problem of efficient and function, mainly contain.
1, capacity utilization is not high.Though the theoretical utilization ratio of four-channel type oxidation channel volume increases than three channel type oxidation channels, but can cause activated sludge concentration difference between each ditch because sewage alternately passes in and out and break-in is flowed, settling tank sludge concentration height, the reaction tank sludge concentration is low, and capacity utilization does not reach theoretical value.
2, plant factor is not high.Each ditch generally all is provided with aerator and whipping device, because capacity utilization is not high, usage ratio of equipment is not high too, and installed capacity is big.The dual-side ditch is rotated conduct and is settled out the ditch in addition, but operated by rotary motion water outlet weir transfer, the platform number is many, and control is complicated, and maintenance capacity is big.
3, owing to there is not stable anaerobic environment, biological phosphor-removing effect is undesirable.Tradition alternative expression oxidation ditch can form local anaerobic environment in ditch, realize denitrification function, but be difficult to form stable anaerobic environment, realizes biological phosphate-eliminating.
Summary of the invention
Deficiency in view of traditional four ditch alternative expression oxidation ditches, the object of the present invention is to provide a kind of modified version four-channel type oxidation channel and sewage water treatment method thereof, this modified version four-channel type oxidation channel was set up anaerobic pond before four-channel type oxidation channel, can improve the efficient of biological dephosphorize denitrification.
Technical scheme of the present invention is: a kind of modified version four-channel type oxidation channel, comprise four-channel type oxidation channel, described four-channel type oxidation channel is made up of four oxidation ditches, each oxidation ditch all is provided with aerator, public pool wall place between four oxidation ditches offers the communicating aperture that is communicated with adjacent two oxidation ditches, it is characterized in that: be provided with anaerobic pond before the described four-channel type oxidation channel, described anaerobic pond is connected with corresponding four oxidation ditches respectively through four control valves, and the mud in the gutter of the conduct precipitation usefulness of described four-channel type oxidation channel is back to anaerobic pond through sludge reflux pump.
Described aerator is for changeing brush or plate-spinning, and described sludge reflux pump is a pump through walls, and described sludge reflux pump is positioned at the sludge reflux pump room, and described sludge reflux pump room is built jointly in four-channel type oxidation channel.
Be provided with the submersible agitator that is used for thorough mixing sewage and returned sluge in the described anaerobic pond.
The oxidation ditch of both sides is respectively equipped with the adjustable water outlet V-notch weir that is used to regulate the oxidation ditch water level, described adjustable water outlet V-notch weir is installed on the effluent trough, be separately installed with the muddy water delivery pipe on the rising pipe of each effluent trough, be respectively equipped with outlet water control valve on each rising pipe, each muddy water delivery pipe is respectively equipped with the muddy water exhaust-control valve.
Based on above-mentioned a kind of modified version four-channel type oxidation channel, the invention provides corresponding a kind of modified version four-channel type oxidation channel sewage water treatment method, it is characterized in that, may further comprise the steps:
(1) provides a kind of above-mentioned modified version four-channel type oxidation channel;
(2) sewage enters anaerobic pond, under the effect of submersible agitator with the returned sluge thorough mixing;
(3), control mixed sewage by control valve and enter corresponding oxidation ditch according to working procedure;
(4) according to working procedure, mixed sewage passes through aerator and communicating aperture, and precipitates at gutter;
(5) according to working procedure, the water of post precipitation is opened the muddy water exhaust-control valve discharging muddy water on the muddy water delivery pipe earlier, the outlet water control valve water outlet of opening rising pipe again by corresponding effluent trough water outlet;
(6) according to working procedure, the mud of the gutter of four-channel type oxidation channel flows mud by corresponding mud recirculating zone through blowback through walls, and corresponding excess sludge is emitted by residual sludge pump.
Working procedure described in step (3), step (4), step (5) and the step (6) comprises following 6 stages.
(1) be 1.5 hours working time fs, and sewage enters the I ditch that submersible agitator all moved, changeed the anoxic condition of brush Close All, finishes denitrification; Mixed solution enters II ditch and III ditch again in the I ditch, and all commentaries on classics brushes and submersible agitator all move in II ditch and the III ditch, carry out nitrification; Mixed solution enters the IV ditch in the II ditch of good oxygen condition and the III ditch, the IV ditch is in precipitation and goes out water state, and all change brush and submersible agitator Close All in the IV ditch, and water outlet is discharged through the effluent trough of IV ditch side, the sludge reflux pump that is positioned at IV ditch side is opened operation, and returned sluge to anaerobic pond carries out dephosphorization.
(2) subordinate phase working time is 1.5 hours, and sewage enters all II ditches that change the good oxygen conditions that brush and submersible agitator all move; All change brush and also all operations of submersible agitator in the I ditch; Mixed solution enters the IV ditch in II ditch and the III ditch, the IV ditch is in precipitation and goes out water state, and all change brush and submersible agitator Close All in the IV ditch, and the effluent trough of water outlet through going out IV ditch side discharged, the sludge reflux pump of IV ditch side is opened operation, and returned sluge to anaerobic pond carries out dephosphorization.
(3) be 1 hour working time phase III, and sewage enters all II ditches that change the good oxygen condition of brush and the whole operations of submersible agitator, and mixed solution enters the IV ditch in II ditch and the III ditch; All change brush and submersible agitator Close All in the I ditch, are in the preliminary precipitation state, and residual active sludge is discharged from the I ditch; The IV ditch is in precipitation and goes out water state, and all change brush and submersible agitator Close All in the IV ditch, and water outlet is discharged through the effluent trough of IV ditch side, and the sludge reflux pump of IV ditch side is opened operation, and returned sluge to anaerobic pond carries out dephosphorization.
Be 1.5 hours (4) quadravalence section working times, and sewage enters the IV ditch that submersible agitator all moved, changeed the anoxic condition of brush Close All, finishes denitrification; Mixed solution enters II ditch and III ditch again in the IV ditch, and all commentaries on classics brushes and submersible agitator all move in II ditch and the III ditch, carry out nitrification; Mixed solution enters the I ditch in the II ditch of good oxygen condition and the III ditch, the I ditch is in precipitation and goes out water state, and all change brush and submersible agitator Close All in the I ditch, and water outlet is discharged through the effluent trough of I ditch side, the sludge reflux pump that is positioned at I ditch side is opened operation, and returned sluge to anaerobic pond carries out dephosphorization.
Be 1.5 hours (5) five-stage working times, and sewage enters all III ditches that change the good oxygen conditions that brush and submersible agitator all move; All change brush and also all operations of submersible agitator in the IV ditch; Mixed solution enters the I ditch in II ditch and the III ditch, the I ditch is in precipitation and goes out water state, and all change brush and submersible agitator Close All in the I ditch, and water outlet is discharged through the effluent trough of I ditch side, the sludge reflux pump of I ditch side is opened operation, and returned sluge to anaerobic pond carries out dephosphorization.
Be 1 hour (6) the 6th working times in stage, and sewage enters all III ditches that change the good oxygen condition of brush and the whole operations of submersible agitator, and mixed solution enters the I ditch in II ditch and the III ditch; All change brush and submersible agitator Close All in the IV ditch, are in the preliminary precipitation state, and residual active sludge is discharged from the IV ditch; The I ditch is in precipitation and goes out water state, and all change brush and submersible agitator Close All in the I ditch, and water outlet is discharged through the effluent trough of I ditch side, and the sludge reflux pump of I ditch side is opened operation, and returned sluge to anaerobic pond carries out dephosphorization.
(7) repeat above-mentioned 6 stages again, continuously cycle operation.
Compared with prior art, the present invention has the following advantages.
(1) this modified version four-channel type oxidation channel was set up anaerobic pond before four-channel type oxidation channel, to be back to this pond as mud in the gutter of precipitation function mixes with water inlet, main purpose is rich phosphorus sludge release and replenishes active sludge, the dephosphorization of realization system also can make simultaneously between each ditch activated sludge concentration suitable; Because the uniform distribution of mud, the real capacity utilization of oxidation ditch of realizing brings up to 69% by 58% of three channel type oxidation channels, greatly reduce gutter volume as settling tank, make the oxidation ditch cubic capacity reduce 11%, the also corresponding plant factor that improved of while, the equipment installed capacity of making has also reduced by 11%.
(2) the sludge reflux pump room is built jointly in oxidation ditch, adopted pump through walls (also claim dived under water wall pump) returned sluge, can reduce the lifting lift of pump, saved power consumption, building jointly of structures simultaneously greatly must be saved construction investment.
(3) the general moving rotation of the adjustable economize on electricity weir gate that is equipped with of traditional alternative expression oxidation ditch gutter is used for water outlet and regulates the submergence of changeing the brush blade, and for reducing facility investment and being convenient to maintenance management, the present invention adopts the water outlet of adjustable water outlet V-notch weir.
Description of drawings
Fig. 1 is the organigram of modified version four-channel type oxidation channel of the present invention.
Fig. 2 is the view of working procedure fs of the present invention.
Fig. 3 is the view of working procedure subordinate phase of the present invention.
Fig. 4 is the view of working procedure phase III of the present invention.
Fig. 5 is the view of working procedure quadravalence section of the present invention.
Fig. 6 is the view of working procedure five-stage of the present invention.
Fig. 7 is the view in the 6th stage of working procedure of the present invention.
Among the figure: the good oxygen condition of N-, the DN-anoxic condition, the A-anaerobic state, S-precipitates state, PS-preliminary sedimentation state.
Embodiment
With reference to figure 1, a kind of modified version four-channel type oxidation channel, comprise four-channel type oxidation channel, described four-channel type oxidation channel is made up of four oxidation ditches, each oxidation ditch all is provided with aerator 1, public pool wall place between four oxidation ditches offers the communicating aperture 2 that is communicated with adjacent two oxidation ditches, it is characterized in that: be provided with anaerobic pond 3 before the described four-channel type oxidation channel, described anaerobic pond 3 is connected with corresponding four oxidation ditches respectively through four control valves 4, and the mud in the gutter of the conduct precipitation usefulness of described four-channel type oxidation channel is back to anaerobic pond 3 through sludge reflux pump 5.
Described aerator 1 is for changeing brush or plate-spinning, and described sludge reflux pump 5 is a pump through walls, and described sludge reflux pump 5 is positioned at the sludge reflux pump room, and described sludge reflux pump room is built jointly in four-channel type oxidation channel, can save energy consumption, reduces equipment investment cost.
For thorough mixing sewage and returned sluge, be provided with submersible agitator 6 in the described anaerobic pond 3.Also be respectively equipped with submersible agitator 6 in four oxidation ditches of this four-channel type oxidation channel.
The oxidation ditch of both sides is respectively equipped with the adjustable water outlet V-notch weir 7 that is used to regulate the oxidation ditch water level, described adjustable water outlet V-notch weir 7 is installed on the effluent trough 8, but adopt effluent trough 8 water outlets to have aeration phase, entered mixed solution in the effluent trough 8 of gutter, pollutent can be deposited on the problem in the effluent trough 8 when preliminary precipitation, water outlet can not directly be discharged, therefore be separately installed with muddy water delivery pipe 10 on the rising pipe 9 of each effluent trough 8, be respectively equipped with outlet water control valve 11 on each rising pipe 9, each muddy water delivery pipe 10 is respectively equipped with muddy water exhaust-control valve 12, the water outlet of controlled oxidation ditch.
Based on above-mentioned a kind of modified version four-channel type oxidation channel, the invention provides corresponding a kind of modified version four-channel type oxidation channel sewage water treatment method, it is characterized in that: a kind of above-mentioned modified version four-channel type oxidation channel is provided; Sewage enters anaerobic pond 3, under the effect of submersible agitator 6 with the returned sluge thorough mixing; According to working procedure, enter corresponding oxidation ditch by the mixed sewage of control valve 4 controls, mixed sewage is through aerator 1 and communicating aperture 2 precipitations, the water of post precipitation by corresponding adjustable water outlet V-notch weir 7 to corresponding effluent trough 8, open the muddy water exhaust-control valve 12 discharging muddy water on the muddy water delivery pipe 10 earlier, open outlet water control valve 11 water outlets of rising pipe 9 again, the mud of the gutter of four-channel type oxidation channel flows mud by corresponding mud recirculating zone 13 through blowback through walls, and corresponding excess sludge is emitted by residual sludge pump.
Described working procedure comprises following 6 stages.
With reference to figure 2, be 1.5 hours working time fs, and sewage enters the I ditch that submersible agitator 6 all moved, changeed the anoxic condition of brush Close All, finishes denitrification; Mixed solution enters II ditch and III ditch again in the I ditch, and all commentaries on classics brushes and submersible agitator 6 all move in II ditch and the III ditch, carry out nitrification; Mixed solution enters the IV ditch in the II ditch of good oxygen condition and the III ditch, the IV ditch is in precipitation and goes out water state, all change brush and submersible agitator 6 Close Alls in the IV ditch, water outlet is discharged through the effluent trough 8 of IV ditch side, the sludge reflux pump 5 that is positioned at IV ditch side is opened operation, and returned sluge to anaerobic pond 3 carries out dephosphorization.
With reference to figure 3, subordinate phase working time is 1.5 hours, and sewage enters all II ditches that change the good oxygen conditions that brush and submersible agitator 6 all move; All change brush and also all operations of submersible agitator 6 in the I ditch; Mixed solution enters the IV ditch in II ditch and the III ditch, the IV ditch is in precipitation and goes out water state, and all change brush and submersible agitator 6 Close Alls in the IV ditch, and water outlet is discharged through the effluent trough 8 of IV ditch side, the sludge reflux pump 5 of IV ditch side is opened operation, and returned sluge to anaerobic pond 3 carries out dephosphorization.
With reference to figure 4, be 1 hour working time phase III, and sewage enters all II ditches that change the good oxygen condition of brush and submersible agitator 6 whole operations, and mixed solution enters the IV ditch in II ditch and the III ditch; All change brush and submersible agitator 6 Close Alls in the I ditch, are in the preliminary precipitation state, and residual active sludge is discharged from the I ditch; The IV ditch is in precipitation and goes out water state, and all change brush and submersible agitator 6 Close Alls in the IV ditch, and water outlet is discharged through the effluent trough 8 of IV ditch side, and the sludge reflux pump 5 of IV ditch side is opened operation, and returned sluge to anaerobic pond 3 carries out dephosphorization.
With reference to 5, the quadravalence section working times of figure be 1.5 hours, sewage enters the IV ditch that submersible agitator 6 all moved, changeed the anoxic condition of brush Close All, finishes denitrification; Mixed solution enters II ditch and III ditch again in the IV ditch, and all commentaries on classics brushes and submersible agitator 6 all move in II ditch and the III ditch, carry out nitrification; Mixed solution enters the I ditch in the II ditch of good oxygen condition and the III ditch, the I ditch is in precipitation and goes out water state, all change brush and submersible agitator 6 Close Alls in the I ditch, water outlet is discharged through the effluent trough 8 of I ditch side, the sludge reflux pump 5 that is positioned at I ditch side is opened operation, and returned sluge to anaerobic pond 3 carries out dephosphorization.
With reference to 6, the five-stage working times of figure be 1.5 hours, sewage enters all III ditches that change the good oxygen conditions that brush and submersible agitator 6 all move; All change brush and also all operations of submersible agitator 6 in the IV ditch; Mixed solution enters the I ditch in II ditch and the III ditch, the I ditch is in precipitation and goes out water state, and all change brush and submersible agitator 6 Close Alls in the I ditch, and water outlet is discharged through the effluent trough 8 of I ditch side, the sludge reflux pump 5 of I ditch side is opened operation, and returned sluge to anaerobic pond 3 carries out dephosphorization.
With reference to 7, the six working times in stage of figure be 1 hour, sewage enters all changes all III ditches of the good oxygen conditions of operation of brush and submersible agitator 6, the interior mixed solution of II ditch and III ditch enters the I ditch; All change brush and submersible agitator 6 Close Alls in the IV ditch, are in the preliminary precipitation state, and residual active sludge is discharged from the IV ditch; The I ditch is in precipitation and goes out water state, and all change brush and submersible agitator 6 Close Alls in the I ditch, and water outlet is discharged through the effluent trough 8 of I ditch side, and the sludge reflux pump 5 of I ditch side is opened operation, and returned sluge to anaerobic pond 3 carries out dephosphorization.
Repeat above-mentioned 6 stages again, each 6 stage is an one-period, cycle operation.
Below in conjunction with a concrete example application embodiment of the invention is further described: certain town sewage plant adopts the present invention, and its water yield is 10,000 m
3/ d, anaerobic zone hydraulic detention time HRT=1.3h, oxidation ditch total hrt HRT=15.8h, total mud SRT=18.8d in age, sludge loading FWV=0.082kgBOD
5/ kgMLSS.d, oxidation ditch available depth H=4.50m, the maximum reflux ratio 100% of mud, sludge concentration is even in the oxidation ditch, and mixed liquid concentration is not less than 3000mg/L, average COD, NH
4+The clearance of-N and TP is respectively up to 80.9%, 85.5% and 82.6%, and effluent quality is better than the regulation of " urban wastewater treatment firm pollutant emission standard " one-level B standard (GB18918-2002).
The above only is preferred embodiment of the present invention, and all equalizations of being done according to the present patent application claim change and modify, and all should belong to covering scope of the present invention.
Claims (6)
1. modified version four-channel type oxidation channel, comprise four-channel type oxidation channel, described four-channel type oxidation channel is made up of four oxidation ditches, each oxidation ditch all is provided with aerator, public pool wall place between four oxidation ditches offers the communicating aperture that is communicated with adjacent two oxidation ditches, it is characterized in that: be provided with anaerobic pond before the described four-channel type oxidation channel, described anaerobic pond is connected with corresponding four oxidation ditches respectively through four control valves, and the mud in the gutter of the conduct precipitation usefulness of described four-channel type oxidation channel is back to anaerobic pond through sludge reflux pump.
2. modified version four-channel type oxidation channel according to claim 1, it is characterized in that: described aerator is for changeing brush or plate-spinning, described sludge reflux pump is a pump through walls, and described sludge reflux pump is positioned at the sludge reflux pump room, and described sludge reflux pump room is built jointly in four-channel type oxidation channel.
3. modified version four-channel type oxidation channel according to claim 2 is characterized in that: be provided with the submersible agitator that is used for thorough mixing sewage and returned sluge in the described anaerobic pond.
4. modified version four-channel type oxidation channel according to claim 3, it is characterized in that: the oxidation ditch of both sides is respectively equipped with the adjustable water outlet V-notch weir that is used to regulate the oxidation ditch water level, described adjustable water outlet V-notch weir is installed on the effluent trough, be separately installed with the muddy water delivery pipe on the rising pipe of each effluent trough, be respectively equipped with outlet water control valve on each rising pipe, each muddy water delivery pipe is respectively equipped with the muddy water exhaust-control valve.
5. a modified version four-channel type oxidation channel sewage water treatment method is characterized in that, may further comprise the steps:
(1) provides a kind of as the described modified version four-channel type oxidation channel of claim 1-4;
(2) sewage enters anaerobic pond, under the effect of submersible agitator with the returned sluge thorough mixing;
(3), control mixed sewage by control valve and enter corresponding oxidation ditch according to working procedure;
(4) according to working procedure, mixed sewage passes through aerator and communicating aperture, and precipitates at gutter;
(5) according to working procedure, the water of post precipitation is opened the muddy water exhaust-control valve discharging muddy water on the muddy water delivery pipe earlier, the outlet water control valve water outlet of opening rising pipe again by corresponding effluent trough water outlet;
(6) according to working procedure, the mud of the gutter of four-channel type oxidation channel flows mud by corresponding mud recirculating zone through blowback through walls, and corresponding excess sludge is emitted by residual sludge pump.
6. modified version four-channel type oxidation channel sewage water treatment method according to claim 5 is characterized in that: the working procedure described in step (3), step (4), step (5) and the step (6) comprises following 6 stages:
(1) be 1.5 hours working time fs, and sewage enters the I ditch that submersible agitator all moved, changeed the anoxic condition of brush Close All, finishes denitrification; Mixed solution enters II ditch and III ditch again in the I ditch, and all commentaries on classics brushes and submersible agitator all move in II ditch and the III ditch, carry out nitrification; Mixed solution enters the IV ditch in the II ditch of good oxygen condition and the III ditch, the IV ditch is in precipitation and goes out water state, and all change brush and submersible agitator Close All in the IV ditch, and water outlet is discharged through the effluent trough of IV ditch side, the sludge reflux pump that is positioned at IV ditch side is opened operation, and returned sluge to anaerobic pond carries out dephosphorization;
(2) subordinate phase working time is 1.5 hours, and sewage enters all II ditch and III ditches of changeing the good oxygen conditions that brush and submersible agitator all move; All change brush and also all operations of submersible agitator in the I ditch; Mixed solution enters the IV ditch in II ditch and the III ditch, the IV ditch is in precipitation and goes out water state, and all change brush and submersible agitator Close All in the IV ditch, and the effluent trough of water outlet through going out IV ditch side discharged, the sludge reflux pump of IV ditch side is opened operation, and returned sluge to anaerobic pond carries out dephosphorization;
(3) be 1 hour working time phase III, and sewage enters all II ditch and III ditches of changeing the good oxygen condition of brush and the whole operations of submersible agitator, and a mixed solution part enters the IV ditch in II ditch and the III ditch; All change brush and submersible agitator Close All in the I ditch, are in the preliminary precipitation state, and residual active sludge is discharged from the I ditch; The IV ditch is in precipitation and goes out water state, and all change brush and submersible agitator Close All in the IV ditch, and water outlet is discharged through the effluent trough of IV ditch side, and the sludge reflux pump of IV ditch side is opened operation, and returned sluge to anaerobic pond carries out dephosphorization;
Be 1.5 hours (4) quadravalence section working times, and sewage enters the IV ditch that submersible agitator all moved, changeed the anoxic condition of brush Close All, finishes denitrification; Mixed solution enters II ditch and III ditch again in the IV ditch, and all commentaries on classics brushes and submersible agitator all move in II ditch and the III ditch, carry out nitrification; Mixed solution enters the I ditch in the II ditch of good oxygen condition and the III ditch, the I ditch is in precipitation and goes out water state, and all change brush and submersible agitator Close All in the I ditch, and water outlet is discharged through the effluent trough of I ditch side, the sludge reflux pump that is positioned at I ditch side is opened operation, and returned sluge to anaerobic pond carries out dephosphorization;
Be 1.5 hours (5) five-stage working times, and sewage enters all II ditch and III ditches of changeing the good oxygen conditions that brush and submersible agitator all move; All change brush and also all operations of submersible agitator in the IV ditch; Mixed solution enters the I ditch in II ditch and the III ditch, the I ditch is in precipitation and goes out water state, and all change brush and submersible agitator Close All in the I ditch, and water outlet is discharged through the effluent trough of I ditch side, the sludge reflux pump of I ditch side is opened operation, and returned sluge to anaerobic pond carries out dephosphorization;
Be 1 hour (6) the 6th working times in stage, and sewage enters all II ditch and III ditches of changeing the good oxygen condition of brush and the whole operations of submersible agitator, and a mixed solution part enters the I ditch in II ditch and the III ditch; All change brush and submersible agitator Close All in the IV ditch, are in the preliminary precipitation state, and residual active sludge is discharged from the IV ditch; The I ditch is in precipitation and goes out water state, and all change brush and submersible agitator Close All in the I ditch, and water outlet is discharged through the effluent trough of I ditch side, and the sludge reflux pump of I ditch side is opened operation, and returned sluge to anaerobic pond carries out dephosphorization;
(7) repeat above-mentioned 6 stages again, continuously cycle operation.
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Cited By (5)
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| CN102603068A (en) * | 2012-03-24 | 2012-07-25 | 洪敏敬 | Pneumatic ecological oxidation ditch |
| CN104496016A (en) * | 2014-12-25 | 2015-04-08 | 上海中信水务产业有限公司 | Biochemical oxygenation stirring process and device system |
| CN104649404A (en) * | 2015-03-03 | 2015-05-27 | 上海城投污水处理有限公司石洞口污水处理厂 | System and method for accurately controlling discharge of treated sewage |
| CN110357255A (en) * | 2019-07-04 | 2019-10-22 | 天津创业环保集团股份有限公司 | A kind of high-efficient denitrification and dephosphorization oxidation ditch |
| CN115367877A (en) * | 2022-08-24 | 2022-11-22 | 上海禾元环保集团有限公司 | Continuous circulating flow biological nitrogen and phosphorus removal reactor and method |
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Cited By (7)
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|---|---|---|---|---|
| CN102603068A (en) * | 2012-03-24 | 2012-07-25 | 洪敏敬 | Pneumatic ecological oxidation ditch |
| CN104496016A (en) * | 2014-12-25 | 2015-04-08 | 上海中信水务产业有限公司 | Biochemical oxygenation stirring process and device system |
| CN104496016B (en) * | 2014-12-25 | 2016-07-06 | 上海中信水务产业有限公司 | A kind of biochemical oxygenation stirring technique and apparatus system |
| CN104649404A (en) * | 2015-03-03 | 2015-05-27 | 上海城投污水处理有限公司石洞口污水处理厂 | System and method for accurately controlling discharge of treated sewage |
| CN110357255A (en) * | 2019-07-04 | 2019-10-22 | 天津创业环保集团股份有限公司 | A kind of high-efficient denitrification and dephosphorization oxidation ditch |
| CN115367877A (en) * | 2022-08-24 | 2022-11-22 | 上海禾元环保集团有限公司 | Continuous circulating flow biological nitrogen and phosphorus removal reactor and method |
| CN115367877B (en) * | 2022-08-24 | 2023-07-14 | 上海禾元环保集团有限公司 | Reactor and method for biological denitrification and dephosphorization by continuous circulation flow |
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|---|---|
| CN101985383B (en) | 2012-01-25 |
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