CN205328822U - Mud decrement and nitrogen and phosphorus removal coupling processing apparatus - Google Patents

Abstract

The utility model discloses a mud decrement and nitrogen and phosphorus removal coupling processing apparatus, include integration biological reaction pond and connect in two heavy ponds of integration biological reaction pond rear end that the front end in integrated biological reaction pond is provided with into water distributing pipe, two heavy pond rear ends are provided with the outlet pipe, and two heavy bottom of the pool portions are provided with excess sludge delivery pipe and sludge return pipe, integration biological reaction pond includes along the bioflocculation pond that the direction of intaking connected gradually, preliminary sedimentation pond, anaerobism pond, oxygen deficiency pond I, good oxygen pond I, the oxygen deficiency pond II oxygen pond II of becoming reconciled, set up agitating unit in the bioflocculation pond, preliminary sedimentation bottom of the pool portion is provided with the mud pipe, becomes reconciled and all loaded spherical porous carrier of microorganism in the oxygen pond II and pack in anaerobism pond, oxygen deficiency pond I, good oxygen pond I, oxygen deficiency pond II, the distributing pipe of intaking is connected with bioflocculation pond, oxygen deficiency pond I and oxygen deficiency pond II, and sludge return pipe is connected with bioflocculation pond and anaerobism pond. The device can deal with short time high concentration organic loading, and mud output is little, nitrogen and phosphorus removal is effectual.

Description

A kind of mud decrement and denitrogenation dephosphorizing coupling processing device

Technical field

This utility model relates to a kind of mud decrement and denitrogenation dephosphorizing coupling processing device, belongs to technical field of sewage。

Background technology

Along with the fast development of Chinese society economy, urbanization and industrialization ground constantly carry out, inevitably the ecological environment of China is impacted。Especially, in water environment, the destruction that environment is caused by water pollution and water nutrition is got over utility model and is shown。The development of industrial or agricultural has been caused and has greatly hindered by water environment, seriously governs the sustainable development of China's economy。Water environment protection progressively obtains national governments and the concern energetically of society, and sewage disposal industry obtains and develops rapidly, and it is also proposed higher requirement simultaneously, particularly requires more and more stricter to the content of nitrogen and phosphorous of water outlet。

The biologic treating technique of the sewage history of existing more than 100 year, in recent years, all parts of the country have been set up the municipal sewage plant of many considerable scales, local water environment treatment is served vital effect by these sewage treatment plants, but sewage treatment plant is frequently encountered by into emergency case such as water exception, sudden changes in actual moving process, for instance poisoning, the silt class height SS inorganic particulate matter of high concentration water inlet impact, heavy metal and poisonous and harmful substance and the impact etc. of oily substance。Although these situations are not the normalization problem of sewage treatment plant, but once occur, sewage treatment plant processes process function and is difficult to actively reply, when affecting light, in activated Sludge System, microbial balance is likely to be broken, the more poor function antibacterial of ability to bear is hit more big, final affects the courses of reaction such as nitrated, denitrification, biological phosphate-eliminating, causes that water outlet exceeds standard。When affecting serious, activated Sludge System is paralysed, and the cycle of recovering is very long, makes the Sewage Plant cannot be properly functioning。At present, some municipal sewage pipe network supervision pressure is bigger, the row's of stealing phenomenon happens occasionally, sewage source character is complex, the Modulatory character of running during based on this water inlet abnormal from increase process function structure, reply water inlet abnormal conditions, evade operation risk, the stable operation of sewage treatment plant are had great importance。

Activated sludge process plays huge effect in sewage, biological wastewater treatment process always, is one for the treatment of technology of being most widely used。One of weakness that activated sludge process is main is that sludge yield is big, and sewage treatment plant creates a large amount of excess sludge while purifying sewage。On the other hand, the main target that water processes is by the removal organic removal turned to nitrogen, phosphorus。In recent years, although wastewater treatment in China rate improves constantly, but the water eutrophication problem caused by nitrogen and phosphorus pollution is not only not solved by, and have day by day serious trend, there is problems and drawback in tradition denitrification dephosphorization technique, wastewater treatment in China factory ubiquity in denitrogenation dephosphorizing that energy consumption is high, efficiency is low and the shortcoming of fluctuation of service, there is many Science and Technology problems anxious to be resolved, how improving the effect of traditional waste water treatment process denitrogenation dephosphorizing, especially the Nitrogen/Phosphorus Removal of low carbon-nitrogen ratio sewage becomes problem in the urgent need to address。

In a word, current most of sewage treatment plants all suffer from the not enough problem with a large amount of excess sludges of generation of biological denitrificaion carbon source, process high with disposal costs。Therefore how cutting down mud generation amount in sewage disposal process, improve the effect of denitrogenation dephosphorizing simultaneously, especially the Nitrogen/Phosphorus Removal of low carbon-nitrogen ratio sewage becomes problem in the urgent need to address。For this, research and develop novel mud decrement and promote denitrogenation dephosphorizing coupling technique and process system thereof, the development of wastewater treatment in China cause is significant。

Utility model content

The waste water processes that this utility model exists for sewage treatment process is long, sludge yield is big, nitrogen phosphorus ligands is inefficient, the problems such as reply abnormal water inlet impact resistance is weak and processing cost is high, devise a kind of collection bioflocculation precipitation, synchronous nitration denitrification denitrogenation, sludge in-situ decrement is in mud decrement integrally and denitrogenation dephosphorizing coupling processing device, this device copes with short time high concentration organic loading, there is sludge yield simultaneously little, good denitrogenation and dephosphorization effect, strong shock resistance, the advantages such as handling process is simple, it it is a kind of urban sewage treating device successfully managing abnormal water inlet。

Utility model is summarized:

This utility model is mainly on the existing denitrogenation processing basis with mud decrement coupling technique, bioflocculation precipitation and biological treatment are organically combined and application, preposition bioflocculation pond and preliminary sedimentation tank, add the second pond sludge reflux point to bioflocculation pond, sludge reflux is increased to 2 backflows by traditional some backflow, and change the volume ratio of biological reaction pool, still further developed a kind of new spherical porous microbe carrier stuffing, obtain mud decrement of the present utility model and denitrogenation dephosphorizing coupling processing device。

This utility model overcomes its technical problem be the technical scheme is that

A kind of mud decrement and denitrogenation dephosphorizing coupling processing device, including:

The second pond of integral biological reaction tank and being connected in one biological reaction pool rear end, the front end of integral biological reaction tank is provided with into water distribution pipe；The rear end of second pond is provided with outlet pipe, and the bottom of second pond is provided with the mud return line bottom excess sludge discharge pipe and being connected in one biological reaction pool；

Described integral biological reaction tank includes the bioflocculation pond, preliminary sedimentation tank, anaerobic pond, anoxic pond I, Aerobic Pond I, anoxic pond II and the Aerobic Pond II that are sequentially connected with along water inlet direction；Being provided with agitating device in bioflocculation pond, the bottom of preliminary sedimentation tank is provided with discharge pipeline, is all filled with spherical porous microbe carrier stuffing in anaerobic pond, anoxic pond I, Aerobic Pond I, anoxic pond II and Aerobic Pond II；

Described enter water distribution pipe be connected with bioflocculation pond, anoxic pond I and anoxic pond II, described mud return line is connected with bioflocculation pond and anaerobic pond。

Preferred according to this utility model, the volume ratio of bioflocculation pond, preliminary sedimentation tank, anaerobic pond, anoxic pond I, Aerobic Pond I, anoxic pond II and Aerobic Pond II is 1:1:1:1:2:1:3。

Preferred according to this utility model, also include aerating system, described aerating system includes the aerating pipelines that air compressor machine is connected and the multiple micro porous aeration heads being arranged on pipeline with air compressor machine, and micro porous aeration head is respectively arranged at Aerobic Pond I and the bottom of Aerobic Pond II。

Preferred according to this utility model, it is provided with assistant chemical dephosphorization administration system between integral biological reaction tank and second pond so that after the further dephosphorization of sewage after integral biological reaction tank processes, enter back into second pond。

Preferred according to this utility model, described spherical porous microbe carrier stuffing includes elastic filler bracing frame and by connecting the floating stuffing support shell with the identical centre of sphere that axle is connected with elastic filler bracing frame, and elastic filler bracing frame is provided with elastic filler；Floating stuffing supports that shell surface is hexagonal poroid and inside is filled with several irregular high porosity carriers；There is gap composition network structure between each high porosity carrier, and internal high porosity carrier can rotate around centre rotational axis。

Preferred according to this utility model, described elastic filler bracing frame includes at least 2 warp round supports and at least 1 parallel round support；Described warp round support is arranged symmetrically, and the number of described parallel round support is odd number。When the number of parallel round support is 1, parallel round support is the equator parallel coil support being arranged on equator；When the number of parallel round support is more than 1, parallel round support includes 1 equator parallel coil support and at least 1 pair of non-equatorial parallel coil support about equator parallel circle symmetry。

Preferred according to this utility model, the diameter of described elastic filler bracing frame is 15cm, and it is 12cm that floating stuffing supports the internal diameter of shell；The porosity of described high porosity carrier is more than 0.9。

The beneficial effects of the utility model are:

1, device energy flexible conversion of the present utility model water inlet and sludge reflux mode so that this device is possible not only to process normal water inlet, it is also possible to successfully manage abnormal water inlet, has the advantage that when the abnormal water inlet of reply

1) when high concentrated organic wastewater, heavy metal wastewater thereby, high inorganic particle waste water enter, all water inlet enters bioflocculation pond, returned sludge 20% is back to bioflocculation pond, a large amount of high-enriched organics matter, inorganic colloid or particulate matter, oily substance etc. can be removed before entering biological reaction pool, there is the advantage that anti-high load capacity impacts, and solve the toxic wastewaters such as the heavy metal destruction to activated Sludge System。

2) for short time high concentration organic loading, this device has the effect that balanced load impacts。

2, device dirt collection aquatic organism denitrogenation dephosphorizing of the present utility model and mud decrement are integrated, and while removing carbonaceous organic material, have the effect of good denitrogenation dephosphorizing and mud decrement。The polyoxygenated reducing environment that multi-stage anaerobic aerobe reaction tank provides is capable of synchronous nitration and denitrification (SND), efficient denitrification is carried out by spherical porous microbe carrier stuffing, and can carry out original position mud effectively decomposing, digesting, fundamentally reduce sludge yield。

3, this utility model have employed a kind of novel spherical porous microbe carrier stuffing, this filler has bigger space structure, along spherome surface to the centre of sphere on sphere space, the polyoxygenated reducing condition of aerobic-anaerobic-anaerobism can be relatively easy to form, easy biofilm, after spherical porous microbe carrier stuffing biofilm, in Aeration tank, present fluidized state, effectively facilitate the mass transfer of nutrient substance and oxygen, can also largely adhering to mud, this filler also helps and carries out Nitrification and sewage water denitrification。

4, this utility model adopts sewage multi-section water-inlet to combine with mud multiple spot reflux type。When normally intaking, adopt three sections of water intake modes, bioflocculation pond, anoxic pond I, anoxic pond II inflow are than for 2:5:3, the mode of segmental influent can more efficiently utilize limited carbon source, promote the growth of denitrifying bacteria, and Aerobic Pond carries out the nitrated carbon source that do not need, thus suppressing the growth of heterotrophic bacteria, promote the growth of nitrobacteria；When extremely intaking, mud adopts 2 reflux types, and sludge reflux is 2:8 to the ratio of bioflocculation pond and anaerobic pond, and returned sludge plays bioflocculation, absorption in bioflocculation pond, plays the effect that primary reinforcement processes。

5, multi-stage anaerobic aerobic reaction condition can flexible。The biological reaction pool of whole device is divided into nine sections, except bioflocculation pond, the volume of every section of biological reaction pool is identical, therefore multi-stage anaerobic aerobic condition can be regulated as required, biological reaction pool is made to become two grades of Anoxic/Aerobic biological reaction pools or three grades of Anoxic/Aerobic biological reaction pools, multiple different condition can be provided to be operated, meet kinds of processes needs。

6, device of the present utility model is easy for installation, simple to operation, dependable performance is stable, treatment effect is good and cost of manufacture is low。Technique fluidised form is pulling flow type, and bio-carrier is floating filler, it is not necessary to support fixing, easy to use, it is possible to reach good sewage water denitrification and mud decrement effect。

Accompanying drawing explanation

Fig. 1 is the structural representation of this utility model mud decrement and denitrogenation dephosphorizing coupling processing device。

Fig. 2 is the plan structure schematic diagram of spherical porous microbe carrier stuffing of the present utility model。

Fig. 3 is the cross-sectional view of spherical porous microbe carrier stuffing of the present utility model。

In figure, 1, water inlet pipe, 2, inlet water lifting pumps, 3, enter water distribution pipe, 4, bioflocculation pond, 5, preliminary sedimentation tank, 6, anaerobic pond, 7, anoxic pond I, 8, Aerobic Pond I, 9, anoxic pond II, 10, Aerobic Pond II, 11, second pond, 12, outlet pipe, 13, discharge pipeline, 14, agitating device, 15, micro porous aeration head, 16, spherical porous microbe carrier stuffing, 17, mud return line, 18, excess sludge discharge pipe, 19, air compressor machine, 20, assistant chemical dephosphorization administration system, 21, sludge reflux pump, 22, residual sludge pump, 161, elastic filler, 162, elastic filler bracing frame, 163, floating stuffing supports shell, 164, high porosity carrier, 165, centre rotational axis, 166, connect axle, 1621, warp round support, 1622, parallel round support。

Detailed description of the invention

Being better understood from this utility model for the ease of those skilled in the art, below in conjunction with the drawings and specific embodiments, this utility model is described in further details, following being merely illustrative of does not limit protection domain of the present utility model。

As shown in Figure 1, mud decrement of the present utility model and denitrogenation dephosphorizing coupling processing device, including: integral biological reaction tank, the second pond 11 of being connected in one biological reaction pool rear end, aerating system and be arranged at the assistant chemical dephosphorization administration system 20 between integral biological reaction tank and second pond 11。

Described integral biological reaction tank includes the bioflocculation pond 4, preliminary sedimentation tank 5, anaerobic pond 6, anoxic pond I 7, Aerobic Pond I 8, anoxic pond II 9 and the Aerobic Pond II 10 that are sequentially connected with along water inlet direction, its volume ratio is 1:1:1:1:2:1:3, waterpower is kept to connect by pool wall hole between each reaction tank in integral biological reaction tank, and for preventing short stream, adopt diagonally opposing corner Inlet and outlet water。The front end of integral biological reaction tank is provided with into water distribution pipe 3, described enter water distribution pipe 3 be connected with bioflocculation pond 4, anoxic pond I 7 and anoxic pond II 9, enter the front end of water distribution pipe 3 and be provided with water inlet pipe 1, described water inlet pipe 1 and enter to be provided with inlet water lifting pumps 2 between water distribution pipe 3；Agitating device 14 it is provided with in order to prevent sludge settling in bioflocculation pond 4, the bottom of preliminary sedimentation tank 5 is provided with discharge pipeline 13 for the primary sludge after preliminary sedimentation tank precipitates is expelled to sludge treating block, is all filled with spherical porous microbe carrier stuffing 16 in anaerobic pond 6, anoxic pond I 7, Aerobic Pond I 8, anoxic pond II 9 and Aerobic Pond II 10。

The rear end of described second pond 11 is provided with outlet pipe 12, the bottom of second pond 11 is provided with the mud return line 17 bottom excess sludge discharge pipe 18 and being connected in one biological reaction pool, excess sludge discharge pipe 18 and mud return line 17 extract mud respectively through residual sludge pump 22 and sludge reflux pump 21, and described mud return line 17 is connected with bioflocculation pond 4 and anaerobic pond 6。

Described aerating system includes the aerating pipelines that air compressor machine 19 is connected and the multiple micro porous aeration heads 15 being arranged on pipeline with air compressor machine, and micro porous aeration head 15 is respectively arranged at the bottom of Aerobic Pond I 8 and Aerobic Pond II 10 and provides oxygen for Aerobic Pond。

Integral biological reaction tank of the present utility model adopts two grades of AO techniques (two grades of anoxic_oxic process), namely sewage is after flowing through anaerobic pond 6, flow through anoxic pond I 7 and Aerobic Pond I 8, anoxic pond II 9 and Aerobic Pond II 10 the two AO processing section successively, alternately contact anoxia and aerobic environment, constitute polyoxygenated reducing environment, sewage water denitrification and mud decrement are served vital effect。

Described spherical porous microbe carrier stuffing 16 forms for PVC integrated injection molding, as shown in Figure 3, it includes spherical shaped elastomeric padding support frame 162 and by connecting the floating stuffing support shell 163 with the identical centre of sphere that axle 166 is connected with elastic filler bracing frame, and elastic filler bracing frame 162 is provided with elastic filler 161。As in figure 2 it is shown, described elastic filler bracing frame 162 includes at least 2 warp round supports 1621 and at least 1 parallel round support 1622, described warp round support 1621 is arranged symmetrically, and the number of described parallel round support 1622 is odd number；When the number of parallel round support 1622 is 1, parallel round support 1622 is the equator parallel coil support being arranged on equator；When the number of parallel round support 1622 is more than 1, parallel round support 1622 includes 1 equator parallel coil support and at least 1 pair of non-equatorial parallel coil support about equator parallel circle symmetry。The present embodiment is preferably 4 warp round supports 1621 and 3 parallel round supports 1622, as shown in Figure 2。

It is hexagonal poroid that described floating stuffing supports shell 163 surface, as shown in Figure 3, it is filled with several irregular high porosity carriers 164 inside it, between each high porosity carrier, there is gap composition network structure, and high porosity carrier 164 can rotate around centre rotational axis 165。It is 15cm that elastic filler supports the diameter of shell 162, and it is 12cm that floating stuffing supports the internal diameter of shell 163；The porosity of described high porosity carrier 164 is more than 0.9。Spherical porous microbe carrier stuffing 16 has bigger space structure, along spherome surface to the centre of sphere on sphere space, the polyoxygenated reducing condition of aerobic-anaerobic-anaerobism can be relatively easy to form, easy biofilm, after spherical porous microbe carrier stuffing 16 biofilm, in Aeration tank, present fluidized state, effectively facilitate the mass transfer of nutrient substance and oxygen。The advantage on space structure having due to spherical porous microbe carrier stuffing after integral biological reaction tank starts, carrier can be made outside and surfaces externally and internally internal, biomembranous produces dissolved oxygen gradient difference, outside and the biofilm surface at the carrier that dissolved oxygen content is higher, nitrifier, aerobic bacteria become dominant bacteria, are conducive to carrying out Nitrification。And inside filler, dissolved oxygen content is few, form anaerobic environment, promote the growth of denitrifying bacteria, be conducive to the carrying out of Denitrification, synchronous nitration and denitrification effect can be formed at spherical porous microbe carrier stuffing place, be conducive to sewage water denitrification。Meanwhile, the network structure that has inside spherical porous microbe carrier stuffing and the characteristic around central axis, be conducive to microorganism colonization, it is possible to adhesion mud to a greater extent。

(1), time when normal influent quality, influent quality index is: COD:260～400mg/L, SS:100～300mg/L, ammonia nitrogen: 75～100mg/L, total nitrogen: 80～130mg/L, total phosphorus: 2.0～5.0mg/L。The method utilizing mud decrement described in the utility model and denitrogenation dephosphorizing coupling processing device, comprises the following steps that

S1, respectively toward the built-in spherical porous microbe carrier stuffing 16 filled out described in embodiment 2 of anaerobic pond 6, anoxic pond I 7, Aerobic Pond I 8, anoxic pond II 9 and Aerobic Pond II 10, the volume ratio loading spherical porous microbe carrier stuffing 16 in described anaerobic pond 6, anoxic pond I 7 and anoxic pond II 9 is 90-100%, and Aerobic Pond I 8 and the volume ratio loading spherical porous microbe carrier stuffing 16 in Aerobic Pond II 10 are 40-60%。

S2, startup device, sewage is promoted by inlet water lifting pumps 2 by water inlet pipe 1, making to distribute to bioflocculation pond 4, anoxic pond I 7 and anoxic pond II 9 into water distribution pipe 3 by valve regulated, the inflow of described bioflocculation pond 4, anoxic pond I 7 and anoxic pond II 9 is than for 2:5:3。

Bioflocculation pond 4 is stirred by S3, agitating device 14, sewage is after the bioflocculation of bioflocculation pond 4, enter preliminary sedimentation tank 5 to precipitate, primary sludge after precipitation is expelled to sludge treating block by discharge pipeline 13, then sewage sequentially enters anaerobic pond 6, anoxic pond I 7, Aerobic Pond I 8, anoxic pond II 9 and Aerobic Pond II 10, aerating system Aerobic Pond I 8 and Aerobic Pond II 10 are carried out aeration；Described operational factor is: MLSS3000～5000mg/L, MLVSS1800～2800mg/L, SV3020～40%, dissolved oxygen 1.5-4.0mg/L, sludge age 18d, the hydraulic detention time HRT respectively 0.5h in described bioflocculation pond 4, preliminary sedimentation tank 5, anaerobic pond 6, anoxic pond I 7, Aerobic Pond I 8, anoxic pond II 9 and Aerobic Pond II 10,1.1h, 1.6h, 1.6h, 3.2h, 1.6h and 4.8h。As can be seen from Figure 1, Aerobic Pond I 8 includes two ponds, Aerobic Pond II 10 includes 3 ponds, namely the hydraulic detention time HRT in above-mentioned Aerobic Pond I 8 is the hydraulic detention time HRT respectively 1.6h in each pond included by 3.2h substantially Aerobic Pond I 8, in like manner, the also respectively 1.6h of the hydraulic detention time HRT in each pond included by Aerobic Pond II 10。

S4, in above-mentioned steps S3 integral biological reaction tank process after sewage after assistant chemical dephosphorization administration system 20, enter second pond 11, hydraulic detention time HRT in second pond is 4h, sewage after sedimentation in secondary sedimentation tank is through outlet pipe 12 water outlet, return sludge ratio in second pond is 100%, mud is all back in bioflocculation pond 4, and excess sludge is discharged through excess sludge discharge pipe 18。Under normal flow condition, 20% water inlet makes there is certain easily biodegradable organics in pond, and quantity is fewer, and returned sludge brings substantial amounts of various microorganism to carry out keen competition for contention nutrient source, reach the effect of the survival of the fittest, play the effect of bioselection pond, the environment of bioflocculation pond 4 anoxia is suitable for denitrifying bacteria growth, denitrifying bacteria utilizes degradable Organic substance as electron donor, utilize nitrate as electron acceptor, obtain rapid appreciation, i.e. Denitrification, play certain denitrification。Bioflocculation pond 4 is also embodied in it as the effect of bioselection pond and bears distribution and the supply of various floras required for whole a set of circulation, and behind bioflocculation pond be immediately anaerobic pond 6, will especially " treatment " at this point for polyP bacteria, it is ensured that all factors affecting polyP bacteria superiority were preferably minimized before anaerobic pond。Affecting the topmost factor of polyP bacteria dephosphorization is dissolved oxygen (molecular state or chemical combination state), if nitrate (combined oxygen) content entering into anaerobic pond 6 is high, good anaerobic environment can not be kept, the effect making polyP bacteria release phosphorus is bad, the effect inhaling phosphorus at Aerobic Pond reduces, and is unfavorable for the removal of phosphorus。So, the nitrate in returned sludge mixed liquor is removed by Denitrification in bioflocculation pond 4, it is ensured that the anaerobic environment of anaerobic pond 6, thus ensureing the phosphor-removing effect of polyP bacteria。In bioflocculation pond 4, water inlet and returned sludge are mixed rapidly, to high substrate (substrate, both easily biodegradable organics had been referred to, also nitrogen is referred to, the nutrients such as phosphorus and dissolved oxygen) after concentration raw sewage carries out uniform bacterization, according to microorganism theory of selection, sentence the major microorganisms zoogloea of starvation under high concentration of substrate, it is rapidly reached higher metabolic activity because having higher multiplication rate, become superior microorganism, and under double oxygen anaerobic state, rapidly degradable Dissolved Organic Matter is converted into the Organic substance being stored in cell (such as glycogen, polymerization hydroxybutyric acid fat etc.), and convert it into the extracellular material being responsible for forming cohesiveness active pollution index subsequently, in bioflocculation pond 4, so quickly form the active pollution index that settling property is good。

Under normal flooded condition, the multipoint water feeding method of operation is adopted to regulate and control so that the sewage of 20% enters bioflocculation pond 4 and whole sludge reflux to bioflocculation pond 4, improves biological denitrification dephosphorization efficiency。After running 6 months continuously, COD, SS, ammonia nitrogen, total nitrogen, total phosphorus index all stably reach international one-level emission standard A。Wherein COD clearance reaches 95-97%, SS clearance and reaches 96-98%, and ammonia nitrogen removal frank reaches 95-98%, nitrogen removal rate reaches 78-88%, and total tp removal rate reaches 90-95%, and sludge yield is only 0.05kgMLSS/kgCOD, it is better than other biological membrane process, there is good mud decrement effect。

(2) when abnormal influent quality, influent quality index is: COD:260～400mg/L, SS:500～600mg/L, ammonia nitrogen: 75～100mg/L, total nitrogen: 80～130mg/L, total phosphorus: 2.0～5.0mg/L。The method utilizing mud decrement described in the utility model and denitrogenation dephosphorizing coupling processing device, comprises the following steps that

S1, respectively toward the built-in spherical porous microbe carrier stuffing 16 filled out described in embodiment 2 of anaerobic pond 6, anoxic pond I 7, Aerobic Pond I 8, anoxic pond II 9 and Aerobic Pond II 10, the volume ratio loading spherical porous microbe carrier stuffing 16 in described anaerobic pond 6, anoxic pond I 7 and anoxic pond II 9 is 90-100%, and Aerobic Pond I 8 and the volume ratio loading spherical porous microbe carrier stuffing 16 in Aerobic Pond II 10 are 40-60%。

S2, start device so that sewage is promoted by inlet water lifting pumps 2 by water inlet pipe 1, make, into water distribution pipe 3, sewage all distributes into bioflocculation pond 4 by valve regulated。

Bioflocculation pond 4 is stirred by S3, agitating device 14, sewage is after the bioflocculation of bioflocculation pond 4, enter preliminary sedimentation tank 5 to precipitate, primary sludge after precipitation is expelled to sludge treating block by discharge pipeline 13, then sewage sequentially enters anaerobic pond 6, anoxic pond I 7, Aerobic Pond I 8, anoxic pond II 9 and Aerobic Pond II 10, aerating system Aerobic Pond I 8 and Aerobic Pond II 10 are carried out aeration；Described operational factor is: MLSS3000～4000mg/L, the hydraulic detention time HRT respectively 0.5h in described bioflocculation pond 4, preliminary sedimentation tank 5, anaerobic pond 6, anoxic pond I 7, Aerobic Pond I 8, anoxic pond II 9 and Aerobic Pond II 10,1.1h, 1.6h, 1.6h, 3.2h, 1.6h and 4.8h。As can be seen from Figure 1, Aerobic Pond I 8 includes two ponds, Aerobic Pond II 10 includes 3 ponds, namely the hydraulic detention time HRT in above-mentioned Aerobic Pond I 8 is the hydraulic detention time HRT respectively 1.6h in each pond included by 3.2h substantially Aerobic Pond I 8, in like manner, the also respectively 1.6h of the hydraulic detention time HRT in each pond included by Aerobic Pond II 10。

S4, in above-mentioned steps S3 integral biological reaction tank process after sewage after assistant chemical dephosphorization administration system 20, enter second pond 11, hydraulic detention time HRT in second pond is 4h, sewage after sedimentation in secondary sedimentation tank is through outlet pipe 12 water outlet, return sludge ratio in second pond is 100%, sludge reflux amount in bioflocculation pond 4 and anaerobic pond 6 is than for 2:8, and excess sludge is discharged through excess sludge discharge pipe 18。Under abnormal flow condition, namely when high concentrated organic wastewater, heavy metal wastewater thereby, high inorganic particle waste water enter, bioflocculation pond 4 uses mainly as bioflocculation sedimentation tank, in bioflocculation pond 4, Organic substance in water inlet, heavy metal, inorganic colloid or particulate matter, oils mix with returned sludge rapidly, at preliminary sedimentation tank 5, returned sludge adsorption precipitation above-mentioned substance, bioflocculation pond 4 and preliminary sedimentation tank 5 have flocculation, absorption, precipitation and denitrification denitrogenation function simultaneously, play the effect that primary reinforcement processes。Sewage after preliminary sedimentation tank 5 processes enters back into anaerobic pond 6 and mixes with 80% activated sludge of backflow, carries out the reactions such as organic biodegradation, dephosphorization, denitrogenation, mud decrement。Under this kind of operating mode, a large amount of high-enriched organics matter, inorganic colloid or particulate matter, oily substance etc. can be removed by this technique preposition bioflocculation pond 4 before entering biological reaction pool, there is the advantage that anti-high load capacity impacts, solve the heavy metal class toxic wastewater destruction to activated Sludge System。Forming primary sludge at preliminary sedimentation tank 5, primary sludge can take two kinds for the treatment of measures: one is, for long time high concentration organic loading, primary sludge can directly be discharged from sedimentation tank 5, and enters the dehydration of sludge dewatering workshop。Now can strengthen sludge reflux amount and even stop the discharge of excess sludge, make former excess sludge bioflocculation pond 4 again with after carry out dehydration outward transport again。Two are, for short time high concentration organic loading, mud after adsorption precipitation can stop to bioflocculation pond 4, when water inlet recovers after normally, start the agitating device 14 in bioflocculation pond more gradually, the mud of adsorption precipitation large amount of organic matter is progressively entered subsequent bio reaction tank, reaches the effect that balanced load impacts。

When influent concentration SS is 550mg/L, the eliminating rate of absorption of SS has been reached 80%～85% by bioflocculation pond 4, and substantial amounts of inorganic particulate matter is introduced into subsequent bio reaction tank, and water outlet COD and ammonia nitrogen value all stably reach one-level A standard。Adsorb through biological reaction pool, concentration of mineral oil in water inlet is down to about 20mg/L by 300mg/L of intaking, and clearance is between 92%～95%, and residue mineral oil is less on the impact of activated sludge, the operational effect of water outlet COD, ammonia nitrogen and total phosphorus is uninfluenced, can stably reach one-level A standard。

In the horizontal, sewage contacts anoxia and aerobic environment successively from water inlet end to water side, constitutes polyoxygenated reducing environment；In the vertical, owing to placing spherical porous microbe carrier stuffing in biological reaction pool, along spherome surface to the centre of sphere, define the polyoxygenated reducing condition of aerobic-anaerobic-anaerobism。Therefore, no matter whole integral biological reaction tank is in overall or local, all defines various polyoxygenated reducing environment, sewage water denitrification and mud decrement are served vital effect。Simultaneously because the multiformity of environment, different types of biological existence, there is bigger Biomass。Polyoxygenated reducing environment is capable of synchronous nitration and denitrification (SND), carries out efficient denitrification by spherical porous microbe carrier, and can carry out original position mud effectively decomposing, digesting, fundamentally reduces sludge yield。In sludge digestion process, macromole carbon source is degraded, discharges carbon source, has promoted denitrogenation dephosphorizing。

Above only describes ultimate principle of the present utility model and preferred implementation, those skilled in the art can make many changes and improvements according to foregoing description, and these changes and improvements should belong to protection domain of the present utility model。

Claims (7)

1. a mud decrement and denitrogenation dephosphorizing coupling processing device, it is characterised in that: including:

The second pond (11) of integral biological reaction tank and being connected in one biological reaction pool rear end, the front end of integral biological reaction tank is provided with into water distribution pipe (3)；The rear end of second pond is provided with outlet pipe (12), and the bottom of second pond (11) is provided with the mud return line (17) bottom excess sludge discharge pipe (18) and being connected in one biological reaction pool；

Described integral biological reaction tank includes the bioflocculation pond (4), preliminary sedimentation tank (5), anaerobic pond (6), anoxic pond I (7), Aerobic Pond I (8), anoxic pond II (9) and the Aerobic Pond II (10) that are sequentially connected with along water inlet direction；Agitating device (14) it is provided with in bioflocculation pond (4), the bottom of preliminary sedimentation tank (5) is provided with discharge pipeline (13), is all filled with spherical porous microbe carrier stuffing (16) in anaerobic pond (6), anoxic pond I (7), Aerobic Pond I (8), anoxic pond II (9) and Aerobic Pond II (10)；

Described enter water distribution pipe (3) be connected with bioflocculation pond (4), anoxic pond I (7) and anoxic pond II (9), described mud return line (17) is connected with bioflocculation pond (4) and anaerobic pond (6)。

2. device according to claim 1, it is characterised in that: the volume ratio of bioflocculation pond (4), preliminary sedimentation tank (5), anaerobic pond (6), anoxic pond I (7), Aerobic Pond I (8), anoxic pond II (9) and Aerobic Pond II (10) is 1:1:1:1:2:1:3。

3. device according to claim 1 and 2, it is characterized in that: also include aerating system, described aerating system includes the aerating pipelines that air compressor machine (19) is connected and the multiple micro porous aeration heads (15) being arranged on pipeline with air compressor machine, and micro porous aeration head (15) is respectively arranged at Aerobic Pond I (8) and the bottom of Aerobic Pond II (10)。

4. device according to claim 1, it is characterised in that: it is provided with assistant chemical dephosphorization administration system (20) between integral biological reaction tank and second pond (11)。

5. device according to claim 1, it is characterized in that: described spherical porous microbe carrier stuffing (16) includes elastic filler bracing frame (162) and by connecting floating stuffing support shell (163) with the identical centre of sphere that axle (166) is connected with elastic filler bracing frame, and elastic filler bracing frame (162) is provided with elastic filler (161)；Floating stuffing supports that shell (163) surface is hexagonal poroid and inside is filled with several irregular high porosity carriers (164)；There is gap composition network structure between each high porosity carrier, and internal high porosity carrier (164) can rotate around centre rotational axis (165)。

6. device according to claim 5, it is characterised in that: described elastic filler bracing frame (162) includes at least 2 warps round support (1621) and at least 1 parallel round support (1622)；Described warp round support (1621) is arranged symmetrically, and the number of described parallel round support (1622) is odd number。

7. device according to claim 5, it is characterised in that: the diameter of described elastic filler bracing frame (162) is 15cm, and it is 12cm that floating stuffing supports the internal diameter of shell (163)；The porosity of described high porosity carrier (164) is more than 0.9。