CN101857344B - Method for treating domestic sewage by applying light ceramic suspended filler moving bed - Google Patents
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Abstract
The invention discloses a method for treating domestic sewage by applying a light ceramic suspended filler moving bed, which comprises the following steps of: pumping low-concentration town sewage into a hydrolytic acidification tank by using a lift pump, maintaining the sewage in the hydrolytic acidification tank for 3 to 8 hours, and controlling the dissolved oxygen to 0.38-0.45mg/L; making thesewage to enter a suspended filler moving bed; under the action of aeration stirring of an aerator pipe, mixing the sewage and a suspended ceramic filler, and breeding microorganisms on the surfaces and pores of the suspended ceramsites; after film formation, forming aerobic, anoxic and anaerobic environment on the surfaces and in the pores of the suspended ceramsites, adsorbing organic matters in the sewage on the surfaces of the suspended ceramsites, and performing simultaneous nitrification-denitrification and simultaneous decarbonization-denitrification on the organic matters by the microorganisms in the biofilm; and finally, making the sewage enter a dosing and coagulating basin, adding a coagulant and coagulant aids into the dosing and coagulating basin, fully reacting, and making the sewage enter an inclined-tube sedimentation tank for sedimentation. The method has the characteristics of short hydraulic retention time, land conservation, investment conservation and low operating cost.
Description
Technical field
The present invention relates to the nutrient imbalance type sewage disposal of the high ammonia nitrogen of low-carbon (LC), be specifically related to the method for the treatment of domestic sewage by applying light ceramic suspended filler moving bed.
Background technology
Along with the continuous acceleration of samll cities and towns' constant development of economy, urbanization process, the rate of growth of town sewage amount and intractability are also continuing to increase.China's south town sewage belongs to the nutrient imbalance type sewage of the high ammonia nitrogen of low-carbon (LC), is sewage of low concentration on the whole, but causes eutrophication easily.For many years, at China's urban wastewater treatment firm, it is main activated sludge process and deformation technique, SBR and deformation technique thereof etc. that main employing is introduced, and concrete treatment process comprises following type:
(1) traditional activated sludge process: this Technology maturation, treatment effect is better and reliable and stable, and adaptability is strong, and support equipment is producing in serial form, design and operational management standard.But exist energy consumption big, easily produce the sludge bulking phenomenon, dephosphorization and denitrification effect is poor, and excess sludge production is big, and excess sludge is handled and the disposal costs height, and anti impulsion load is relatively poor, and structures are more, and automatization requires high, and floor space is big.
(2) biomembrance process: this method microorganism is abundant mutually, biomass is big, and load is high, and sludge concentration can be up to 5～20 times of activated sludge process, be beneficial to the growth and breeding of long nitrated, denitrifying bacterium generation time, have nitration denitrification denitrogenation function certain the time; The stability of thalline is high, toxin immunity is good, environmental compatibility is strong, anti impulsion load, no sludge bulking problem; Excess sludge production is few, can handle lower concentration (BOD
5Be lower than 50mg/L) sewage, do not need mud to reflux, operational management is easy, and stable and reliable operation and cost are lower, and take up an area of little.But this method biofilm time is long, starts, initial failure period is long; Main units structure more complicated, the installation requirement height requires the level of automation height; Investment cost is higher.
(3) suspended filler moving bed technology: the suspending carrier biomembrance process of the mid-90 in 20th century exploitation claims suspended filler moving bed (moving bed biofilm reactor is called for short MBBR) technology again; The advantage that integrates traditional fluidized-bed and biological contact oxidation process is compared with the other biological embrane method with activated sludge process, and it has overcome activated sludge process and has taken up an area of greatly, shortcomings such as sludge bulking and sludge loss can take place; Having solved the static bed biomembrane method needs regular back flushing, cleans complex operations problems such as filtrate and replacing aerator; Overcome fluidized-bed and made the excessive shortcoming of carrier fluidizing power consumption.Than aerobic biofilter capacity utilization height; Lower than blodisc failure rate of machinery; More even than BAF gas distribution water distribution, do not need back flushing; More stable than fluidized-bed.Denitrification functions is also very outstanding.But also there are following problems in the technology of MBBR and application: (1) plastic filler filling ratio is bigger, and cost is higher, and energy consumption is higher; (2) plastic filler biofilm and demoulding are all undesirable, influence treatment effect, and microorganism growth is single on the plastic filler, and the microbial film anti impulsion load is not strong, recover slowly.In addition, soft, semi soft packing often twines is entangled with, mobile poor; (3) phosphor-removing effect is poor, does not have the dephosphorization supplementary measures.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, propose a kind of biofilm time short, phosphor-removing effect good, economical and practical, can effectively handle the method for southern cities and towns lower concentration, the high ammonia nitrogen sanitary sewage of low-carbon (LC).
Purpose of the present invention is achieved through the following technical solutions:
The method for the treatment of domestic sewage by applying light ceramic suspended filler moving bed comprises the steps:
(1) sewage in lower concentration cities and towns enters hydrolysis acidification pool by lift pump, and sewage is 3～8h at the hydrolysis acidification pool hydraulic detention time, and dissolved oxygen is controlled to be 0.38～0.45mg/L;
(2) enter suspended filler moving bed through the sewage after the acidication processing; Sewage is entered by water-in, makes under the current direction through the dividing plate water conservancy diversion, enters a body bottom, and the filter screen by the lower partition enters the first module body; At the first module body, sewage is mixed with the suspension ceramics filling down by the aeration agitaion of aeration tube, and microorganism breeds in suspension haydite surface and duct; After finishing biofilm, form aerobic, anoxic and anaerobic environment in suspension haydite surface and the hole, the haydite that suspended of the organism in the sewage is adsorbed on the surface, organism by the microorganism in the microbial film simultaneously nitration denitrification realize carbon elimination denitrogenation simultaneously; Process first module body treat effluent filtering net enters the buffer zone between filter screen and the dividing plate, enter second cell cube after the lower partition filter screen, sewage is identical with first module body treating processes in the treating processes of second cell cube, enter the 3rd cell cube again, the 3rd unitary treating processes is identical with the treating processes of first module body, and the water outlet after the final processing of the 3rd cell cube is effluxed by water outlet through overflow weir; Sewage is 3～10h in the suspended filler moving bed power residence time, the gas-water ratio of aeration 3: 1～7: 1; Described suspension ceramics filling is the light ceramic filler, and outward appearance is spherical, particle diameter 8～12mm, and the tap density of haydite is 350～400kg/m
3, pellet density is 600～700kg/m
3, voidage is 40%, specific surface area is 3.5～4.0cm
2/ g;
(3) sewage from suspended filler moving bed water outlet enters the dosing coagulation basin, adds coagulating agent and coagulant aids at the dosing coagulation basin, fully enters the tube settler precipitation after the reaction; The densitometer in sewage with coagulating agent PAC and coagulant aids PAMPAC, coagulating agent PAC dosage is 5～25mg/L, the PAM dosage is 1～3mg/L.
For further realizing the object of the invention preferably being provided with plastics combined stuffing, asbestos tile sheet material filler in the described hydrolysis acidification pool, filling ratio all is 30%, and the filler fixed code is placed on the bracing frame at the bottom of the pond.
It is cylindric that described aeration tube is preferably cavity, is divided into aeration inlet pipe and gas distribution pipe, and gas distribution pipe is horizontally disposed with, inlet pipe vertically is provided with, the external gas blower of inlet pipe, and the inlet pipe lower end is fixed on gas distribution pipe central authorities by flange, gas distribution pipe is provided with solarization air cap, and the medullary ray of solarization air cap is horizontal by 45 °.
The boring aeration pipe that described aeration tube is preferably made by pvc pipe, ABS pipe or aluminium-alloy pipe.
The grid in the 5mm that described filter screen is preferably made by aluminum alloy materials * 5mm aperture.
The sewage in described lower concentration cities and towns is preferably from settling pit.
Compare with existing MBBR sewage-treating reactor, the utlity model has following advantage:
The present invention at first adopts acidication, can increase the biodegradability of waste water effectively, improves the degradation efficiency of follow-up haydite MBBR; Adopt the Aerobic Pond backflow simultaneously, can improve the nitric efficiency of system effectively; Again through the dephosphorization of enhanced coagulation precipitation, improved the removal efficient of TP and pollutent at last.
(1) using maximum at present is the MBBR of plastic filler.Practice shows, uses plastic filler, and effect is all undesirable on the biofilm of MBBR and demoulding, still can't come off even the microorganism of film inside loses activity, and has influenced the treatment effect of MBBR.And microorganism growth is single on the plastic filler, makes the microbial film anti impulsion load not strong, recovers slowly.In addition, soft, semi soft packing often twines and is entangled with mobile variation; And hard Ball-type packing filling ratio is not low yet, increases cost.The substitute of present domestic plastic filler also comprises water caltrop skin, mao bamboon etc., and the physical strength of these materials is not enough, and use is subjected to regional impact bigger.The present invention uses haydite as filler, has not only improved biofilm speed, and has greatly reduced cost investment, is convenient to widespread usage and promotes.
(2) use MBBR to handle southern cities and towns lower concentration, the high ammonia nitrogen sanitary sewage of low-carbon (LC) at present separately, in limited floor area of building scope, not only carbon elimination efficient is subjected to certain limitation, and denitrification dephosphorization function can not finely be realized.The present invention adopts hydrolysis/light ceramic suspended filler moving bed/coagulating sedimentation to handle southern town sewage, and acidication has increased the biodegradability of water pollutant, helps the decarbonitation of follow-up aerobic reactor; The backflow of aerobic nitrification liquid helps the denitrogenation of total system equally; Final chemical coagulation and precipitation has guaranteed the phosphor-removing effect of system.
After the cities and towns sewage of low concentration was handled through combination process of the present invention, water outlet can reach urban wastewater treatment firm pollutant emission standard (GB18918-2002) one-level A standard.
Description of drawings
Fig. 1 is applying light ceramic suspended filler moving bed and structural representation coagulating treatment sanitary sewage system.Shown in the figure: hydrolysis acidification pool 1, lift pump 2, reflux pump 3, coagulating and tube settler 4, suspended filler moving bed 5, dosing coagulation basin 6 and tube settler 7.
Fig. 2 is suspended filler moving bed structural representation.Shown in the figure: bed body 11, water-in 12, dividing plate 13, filter screen 14, filler 15, water outlet 16, aeration tube 17, overflow weir 18, refluxing opening 19 and mud discharging mouth 20.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
As shown in Figure 1, the treating domestic sewage by applying light ceramic suspended filler moving bed system comprises hydrolysis acidification pool 1, suspended filler moving bed 5 and coagulating and tube settler 4, hydrolysis acidification pool 1 front-end pipelines is provided with lift pump 2, the settling pit water outlet is pumped into hydrolysis acidification pool 1, hydrolysis acidification pool 1 is connected with suspended filler moving bed 5 by pipeline, the pipe connection that suspended filler moving bed 5 water outlets are provided with coagulating and tube settler 4 and hydrolysis acidification pool 1 front end respectively.Hydrolysis acidification pool 1 built-in combined stuffing, combined stuffing comprise plastics combined stuffing, rectangle asbestos tile sheet material etc., and the filler fixed code is placed on the bracing frame at the bottom of the pond.Coagulating and tube settler 4 comprise dosing coagulation basin 6 and tube settler 7; Tube settler 7 front ends are provided with dosing coagulation basin 6.
As shown in Figure 2, suspended filler moving bed 5 comprise a body 11, water-in 12, dividing plate 13, filter screen 14, filler 15, water outlet 16, aeration tube 17, overflow weir 18, refluxing opening 19 and mud discharging mouth 20.Bed body 11 is the square cavity structure, be provided with a plurality of dividing plates 13 in the cavity, dividing plate 13 lower ends are provided with the communicating aperture that effluent stream is crossed, dividing plate 13 is partitioned into a plurality of cell cubes that are interconnected with the cavity of bed body 11, be provided with aeration tube 17 in each cell cube and place filler 15, aeration tube 17 is that cavity is cylindric, be divided into aeration inlet pipe and gas distribution pipe, gas distribution pipe is horizontally disposed with, inlet pipe vertically side is provided with, the external gas blower of inlet pipe, the lower end is fixed on gas distribution pipe central authorities by flange, gas distribution pipe is provided with solarization air cap, the medullary ray of solarization air cap is horizontal by 45 °, pool wall near water-in 12 is provided with dividing plate 13, make the sewage that enters flow into the bottom of bed body 11 along the space between pool wall and the dividing plate 13, dividing plate 13 front ends on each cell cube right side are provided with filter screen 14, the bed left and right sides, body 11 top is respectively equipped with water-in 12 and water outlet 16, bed body 11 is positioned at water-in 12 and water outlet 16 places are provided with overflow weir 18, the bottom refluxing opening 19 and the mud discharging mouth 20 of bed body 11, refluxing opening 19 is in the side of bed body 11, and mud discharging mouth 20 is in the bottom of bed body 11, rely on flange and bed body 11 UNICOMs, adopt the valve trip switch.Filler 15 is the light ceramic filler, and outward appearance is spherical, particle diameter 8～12mm, and the tap density of haydite is 350～400kg/m
3, pellet density is 600～700kg/m
3, voidage is about 40%, and the haydite filling ratio is 5～50%, the about 1.0Mpa of cylindrical compress strength, the 1h water-intake rate is about 12%, the about 3.5～4.0cm of specific surface area
2/ g is for microorganism provides specific surface area bigger habitat.The boring aeration pipe that aeration tube 17 is made by plastics tubings such as pvc pipe, ABS pipe or aluminium-alloy pipe is by external Aeration fan.Filter screen 14 is made by aluminum alloy materials, wherein is the grid in 5mm * 5mm aperture.Bed body 11 adopts dividing plate 13 that reactor is divided into the plural serial stage structure, and the cell cube that respectively separates is for hybrid fully, and reactor monolith can be considered pulling flow type.Bed body 11 can be concrete structure with overflow weir 18 or is made of steel plate system, plastic plate etc.
The sewage in lower concentration cities and towns is from settling pit, at first enter hydrolysis acidification pool 1 by lift pump 2, sewage is 3～8h at the hydrolysis acidification pool hydraulic detention time, utilize big resistance water distribution waterpower to stir, dissolved oxygen is 0.38～0.45mg/L, anaerobic environment helps the organism macromole and is hydrolyzed to small molecules, has improved the biodegradability of water inlet, and pollutent is had certain clearance.Hydrolysis acidification pool also receives suspended filler moving bed 5 nitrated phegma, carries out denitrification denitrogenation, improves the nitric efficiency of system.Phegma is a mud mixture, and hydrolysis acidification pool 1 realizes that by control mud age the mud in the pond reaches balance.
For further effectively removing ammonia nitrogen and organism, sewage enters suspended filler moving bed 5 after handling through acidication; Sewage is entered by water-in 12, makes under the current direction through dividing plate 13 water conservancy diversion, enters a body 11 bottoms, and the communicating aperture by dividing plate 13 bottoms enters the first module body; At the first module body, sewage is following and filler 15 (suspension haydite) thorough mixing by the aeration agitaion of aeration tube 17, and microorganism is breeding in a large number in suspension haydite surface and duct.After finishing the biofilm startup, form aerobic, anoxic and anaerobic environment in suspension haydite surface and the hole, organism in the sewage and other pollutents haydite that suspended is adsorbed on the surface, organism by the microorganism in the microbial film simultaneously nitration denitrification realize carbon elimination denitrogenation simultaneously; The buffer zone that process first module body treat effluent filtering net 14 enters between filter screen 14 and the dividing plate 13, enter second cell cube after dividing plate 13 bottom communicating apertures, sewage is identical with first module body treating processes in the treating processes of second cell cube, enter the 3rd cell cube again, the 3rd unitary treating processes is identical with the treating processes of first module body, and the water outlet after the final processing of the 3rd cell cube is effluxed by water outlet 16 through overflow weir 18.Sewage is 3～10h in the suspended filler moving bed 5 power residence time, the gas-water ratio of aeration 3: 1～7: 1, and the renewal that can constantly come off of the microbial film among the haydite MBBR, reactor also can produce active sludge, needs regularly spoil disposal.The haydite surface is long certain thickness microbial film, produces certain dissolved oxygen and vegetative gradient from outside to inside, thereby more complete contaminant degradation gradient condition is provided, and this microenvironment is particularly conducive to denitrogenation.The phase mutual friction of haydite helps on the one hand nutraceutical contact the in microbial film and the water, accelerates the microbial film renewal; Can cut bubble on the other hand, improve coefficient of oxygen utilization.
Be further to improve the removal efficient of phosphorus, enter coagulating and tube settler 4, add coagulating agent PAC and coagulant aids PAM, fully enter tube settler after the reaction and precipitate 7 at dosing coagulation basin 6 from the sewage of suspended filler moving bed 5 water outlets; Adopt the composite enhanced coagulation dephosphorization of PAC+PAM, by the densitometer in sewage, the PAC dosage is 5～25mg/L, and the PAM dosage is 1～3mg/L.Tube settler 7 water outlets reach urban wastewater treatment firm pollutant emission standard (GB18918-2002) one-level A standard.
Embodiment 1
Under 25～29 ℃ of conditions of water temperature, it is 60% hydrolysis acidification pool 1 that southern somewhere town sewage is pumped into filling ratio, hydrolysis acidification pool 1 useful volume 6.75m
3, hydrolysis acidification pool 1 built-in shaggy asbestos tile, filling ratio 30%, built-in plastics semi soft packing, filling ratio 30%, the residence time is 6.0h; It is suspended filler moving bed 5 that hydrolysis acidification pool water outlet supernatant liquor enters, (filler 15 is the light ceramic filler, and outward appearance is spherical, particle diameter 8～12mm, and the tap density of haydite is 350～400kg/m
3, pellet density is 600～700kg/m
3, voidage is about 40%, the about 1.0Mpa of cylindrical compress strength, and the 1h water-intake rate is about 12%, the about 3.5～4.0cm of specific surface area
2/ g is for microorganism provides specific surface area bigger habitat) residence time is 7.0h, and the haydite filling ratio is 30%, and gas-water ratio is 4: 1, and the muddy water mixed solution reflux ratio is 100%; The moving-bed water outlet enters dosing coagulation basin 6, dosing coagulation basin 6 useful volume 0.125m
3, by the densitometer in sewage, the PAC dosage is 15mg/L, adjusts pH＞9,150r/min stirs 1min, adds coagulant aids PAM, and by the densitometer in sewage, dosage is 2mg/L, 50r/min stirs 10min, and mixed solution enters tube settler 7, tube settler 7 useful volume 1.0m
3, the residence time is 1.2h.
After testing, water inlet COD mean value is 130mg/L, and water outlet mean value is 20mg/L, and clearance is 84.6%; Water inlet BOD
5Mean value is 60mg/L, and water outlet mean value is 9.5mg/L, and clearance is 84.2%; Water inlet NH
4 +-N mean value is 18mg/L, and water outlet mean value is 4.5mg/L, and clearance is 75%; Water inlet TN mean value is 25mg/L, and water outlet mean value is 11.5mg/L, and clearance is 54%; Water inlet TP mean value is 4.5mg/L, and water outlet mean value is 0.45mg/L, and clearance is 90%; Water inlet SS mean value is 110mg/L, and water outlet mean value is 8mg/L, and clearance is 92.7%.
Embodiment 2
Under 25～29 ℃ of conditions of water temperature, it is 60% hydrolysis acidification pool 1 that southern somewhere town sewage is pumped into filling ratio, hydrolysis acidification pool 1 useful volume 6.75m
3, hydrolysis acidification pool 1 built-in shaggy asbestos tile, filling ratio 30%, built-in plastics semi soft packing, filling ratio 30%, the residence time is 5.0h; It is suspended filler moving bed 5 that hydrolysis acidification pool water outlet supernatant liquor enters, (filler 15 is the light ceramic filler, and outward appearance is spherical, particle diameter 8～12mm, and the tap density of haydite is 350～400kg/m
3, pellet density is 600～700kg/m
3, voidage is about 40%, the about 1.0Mpa of cylindrical compress strength, and the 1h water-intake rate is about 12%, the about 3.5～4.0cm of specific surface area
2/ g is for microorganism provides specific surface area bigger habitat) residence time is 6.0h, and the haydite filling ratio is 35%, and gas-water ratio is 3: 1, and the muddy water mixed solution reflux ratio is 150%; The moving-bed water outlet enters dosing coagulation basin 6, dosing coagulation basin 6 useful volume 0.125m
3, by the densitometer in sewage, the PAC dosage is 10mg/L, adjusts pH＞9,150r/min stirs 1min, adds coagulant aids PAM, and by the densitometer in sewage, dosage is 1mg/L, 50r/min stirs 10min, and mixed solution enters tube settler 7, tube settler 7 useful volume 1.0m
3, the residence time is 1.0h.
After testing, water inlet COD mean value is 121mg/L, and water outlet mean value is 20.2mg/L, and clearance is 83.3%; Water inlet BOD
5Mean value is 53mg/L, and water outlet mean value is 9.8mg/L, and clearance is 81.5%; Water inlet NH
4 +-N mean value is 15mg/L, and water outlet mean value is 4.2mg/L, and clearance is 72%; Water inlet TN mean value is 22mg/L, and water outlet mean value is 9.7mg/L, and clearance is 55.9%; Water inlet TP mean value is 4.1mg/L, and water outlet mean value is 0.49mg/L, and clearance is 88%; Water inlet SS mean value is 102mg/L, and water outlet mean value is 10mg/L, and clearance is 90.2%.
Embodiment 3
Under 25～29 ℃ of conditions of water temperature, it is 60% hydrolysis acidification pool 1 that southern somewhere town sewage is pumped into filling ratio, hydrolysis acidification pool 1 useful volume 6.75m
3, hydrolysis acidification pool 1 built-in shaggy asbestos tile, filling ratio 30%, built-in plastics semi soft packing, filling ratio 30%, the residence time is 4.0h; It is suspended filler moving bed 5 that hydrolysis acidification pool water outlet supernatant liquor enters, (filler 15 is the light ceramic filler, and outward appearance is spherical, particle diameter 8～12mm, and the tap density of haydite is 350～400kg/m
3, pellet density is 600～700kg/m
3, voidage is about 40%, the about 1.0Mpa of cylindrical compress strength, and the 1h water-intake rate is about 12%, the about 3.5～4.0cm of specific surface area
2/ g is for microorganism provides specific surface area bigger habitat) residence time is 5.0h, and the haydite filling ratio is 40%, and gas-water ratio is 3: 1, and the muddy water mixed solution reflux ratio is 200%; The moving-bed water outlet enters dosing coagulation basin 6, dosing coagulation basin 6 useful volume 0.125m
3, by the densitometer in sewage, the PAC dosage is 5mg/L, adjusts pH＞9,150r/min stirs 1min, adds coagulant aids PAM, and by the densitometer in sewage, dosage is 1mg/L, 50r/min stirs 10min, and mixed solution enters tube settler 7, tube settler 7 useful volume 1.0m
3, the residence time is 0.8h.
After testing, water inlet COD mean value is 113mg/L, and water outlet mean value is 19.8mg/L, and clearance is 82.5%; Water inlet BOD
5Mean value is 47mg/L, and water outlet mean value is 9.4mg/L, and clearance is 80.1%; Water inlet NH
4 +-N mean value is 14.2mg/L, and water outlet mean value is 4.2mg/L, and clearance is 70.1%; Water inlet TN mean value is 21.5mg/L, and water outlet mean value is 9.4mg/L, and clearance is 56.1%; Water inlet TP mean value is 4.0mg/L, and water outlet mean value is 0.50mg/L, and clearance is 87.5%; Water inlet SS mean value is 95.5mg/L, and water outlet mean value is 9.8mg/L, and clearance is 89.7%.
Claims (6)
1. the method for the treatment of domestic sewage by applying light ceramic suspended filler moving bed is characterized in that comprising the steps:
(1) sewage in lower concentration cities and towns enters hydrolysis acidification pool by lift pump, and sewage is 3～8h at the hydrolysis acidification pool hydraulic detention time, and dissolved oxygen is controlled to be 0.38～0.45mg/L;
(2) enter suspended filler moving bed through the sewage after the acidication processing; Sewage is entered by water-in, makes under the current direction through the dividing plate water conservancy diversion, enters a body bottom, and the filter screen by the lower partition enters the first module body; At the first module body, sewage is mixed with the suspension ceramics filling down by the aeration agitaion of aeration tube, and microorganism breeds in suspension haydite surface and duct; After finishing biofilm, form aerobic, anoxic and anaerobic environment in suspension haydite surface and the hole, the haydite that suspended of the organism in the sewage is adsorbed on the surface, organism by the microorganism in the microbial film simultaneously nitration denitrification realize carbon elimination denitrogenation simultaneously; Process first module body treat effluent filtering net enters the buffer zone between filter screen and the dividing plate, enter second cell cube after the lower partition filter screen, sewage is identical with first module body treating processes in the treating processes of second cell cube, enter the 3rd cell cube again, the 3rd unitary treating processes is identical with the treating processes of first module body, and the water outlet after the final processing of the 3rd cell cube is effluxed by water outlet through overflow weir; Sewage is 3～10h in the suspended filler moving bed power residence time, the gas-water ratio of aeration 3: 1～7: 1; Described suspension ceramics filling is the light ceramic filler, and outward appearance is spherical, particle diameter 8～12mm, and the tap density of haydite is 350～400kg/m
3, pellet density is 600～700kg/m
3, voidage is 40%, specific surface area is 3.5～4.0cm
2/ g;
(3) sewage from suspended filler moving bed water outlet enters the dosing coagulation basin, adds coagulating agent and coagulant aids at the dosing coagulation basin, fully enters the tube settler precipitation after the reaction; The densitometer in sewage with coagulating agent PAC and coagulant aids PAM, coagulating agent PAC dosage is 5～25mg/L, the PAM dosage is 1～3mg/L.
2. the method for the treatment of domestic sewage by applying light ceramic suspended filler moving bed according to claim 1, it is characterized in that: be provided with plastics combined stuffing, asbestos tile sheet material filler in the described hydrolysis acidification pool, filling ratio all is 30%, and the filler fixed code is placed on the bracing frame at the bottom of the pond.
3. the method for the treatment of domestic sewage by applying light ceramic suspended filler moving bed according to claim 1, it is characterized in that: described aeration tube is that cavity is cylindric, be divided into aeration inlet pipe and gas distribution pipe, gas distribution pipe is horizontally disposed with, inlet pipe vertically is provided with, the external gas blower of inlet pipe, and the inlet pipe lower end is fixed on gas distribution pipe central authorities by flange, gas distribution pipe is provided with solarization air cap, and the medullary ray of solarization air cap is horizontal by 45 °.
4. the method for the treatment of domestic sewage by applying light ceramic suspended filler moving bed according to claim 3 is characterized in that: described aeration tube is the boring aeration pipe of being made by pvc pipe, ABS pipe or aluminium-alloy pipe.
5. the method for the treatment of domestic sewage by applying light ceramic suspended filler moving bed according to claim 3 is characterized in that: described filter screen is the grid in the 5mm * 5mm aperture of being made by aluminum alloy materials.
6. the method for the treatment of domestic sewage by applying light ceramic suspended filler moving bed according to claim 1, it is characterized in that: the sewage in described lower concentration cities and towns is from settling pit.
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