Summary of the invention
A kind of sewage-treatment plant and method proposed the purpose of the present invention is to solve background technique, by dirt
Water carries out anoxic adjusting, anoxic denitrification, aeration, oxidative nitration, precipitating filtering, ultrasonic oxidation, bentonite and composite diatomite
Processing, aluminium polychloride coagulating sedimentation, physical absorption continuous processing, can be effectively by nitrogen, phosphorus element and the antibiosis in sewage
Plain sufficiently release is effectively removed into sewage, and by nitrogen, phosphorus element and antibiotic, realizes the harmless treatment to sewage,
Prevent sewage from having broad application prospects to the further pollution of existing freshwater resources in short supply.
To achieve the goals above, present invention employs following technical solutions:
A kind of sewage-treatment plant, it is characterised in that: including adjusting tank, the anti-nitre of anoxic by the sequentially connected anoxic of pipeline
Change tank, aeration tank, oxidator, sedimentation basin, filtering ponds, ultrasonic treatment oxidation tank, blending tank, settling tank, adsorption tower;It is lacked described
Oxygen denitrification tank is internally provided with motor and agitating device, is provided with airlift pump and stripping tube outside the anoxic denitrification tank
Road, the air demand by controlling the airlift pump quantitatively promote the sewage in the anoxic denitrification tank into the aeration tank;
The aeration tank is internally provided with hydrolysis blender and aerator, the uniform stomata that the aerator is arranged by surface to
Oxygen is supplied in the aeration tank, the hydrolysis blender passes through the motor driven agitating shaft being arranged at the top of the aeration tank and turns
It is dynamic;The oxidator bottom is provided with evenly arranged drainage hole, and the drainage hole is connect with drainpipe, and the drainpipe passes through
Water pump is connect with the anoxic denitrification tank;It is provided with the detour baffle for stopping drainage flow in the sedimentation basin, sewage and mixed
It closes liquid and the anoxic adjusting tank is back to by pipeline;The both sides external of the ultrasonic treatment oxidation tank is provided with ultrasonic wave
Device is provided with solution adding mouth at the top of the ultrasonic treatment oxidation tank;There are two agitating device, institutes for setting in the blending tank
Stating agitating device includes agitating shaft and stirring blade, has the paddle by the motor driven belts being arranged at the top of the blending tank
The agitating shaft of piece rotates, and one lateral roof of blending tank is provided with adding mouth;The settling tank is internally provided with spray thrower,
Reagent is added into the settling tank by the spray thrower, the precipitating pot bottom is provided with motor-driven agitating shaft, institute
It states and is provided with filter in the middle part of settling tank side, the clear liquid through the filter passes through pipeline to the adsorption tower;Institute
It states and is filled with adsorbent in adsorption tower, the clear water after the adsorbent adsorption treatment is discharged by pipeline.
As further restriction of the invention, anoxic denitrification pot sidewall is provided with biologic packing material, utilizes the life
Pollutant biochemical in the microorganism initial breakdown removal sewage of apposition growth on object filler.
As further restriction of the invention, it is provided with three layer filtration layer in filtering ponds, from top to bottom successively are as follows: be used for
Filter the first filter layer of bulky grain, the filter bed of essence of filter small particles and the ultrafiltration layer for filtering molecule;It is arranged in the first filter layer
There is quartz sand, soft material fiber and particulate filler are provided in the filter bed of essence, is provided with ceramic filter plate in the ultrafiltration layer.
As further restriction of the invention, oxidator includes cabinet, horizontal baffle, micropore aeration pipe, exhaust level, electricity
Machine, retarder and aerator;The horizontal baffle is set in the middle part of cabinet, for realizing the laminar flow of sewage;The motor,
Retarder and the aerator are all set in the cabinet top, and the aerator passes through revolution several ceramic disks of axis connection,
The rotating shaft rotation is driven to drive the ceramic disk rotation by the motor and retarder;The horizontal baffle side is set
Exhaust level is set, the gas after aeration reaction is discharged;The bottom of box is arranged several micropore aeration pipes, in Xiang Suoshu oxidator
Input oxygen.
As further restriction of the invention, horizontal baffle width is equal with box width, the horizontal baffle length
More slightly shorter than cabinet length, there are water space is crossed between the horizontal baffle both ends and cabinet, sewage is in cabinet around described
Horizontal baffle obstructs to be circulated in the vertical cyclic loop to be formed.
The oxidator of above structure through the invention considerably increases oxidation by overlapping to oxide regions
The depth in region, saves system footprint to the greatest extent, oxidator due to being provided with horizontal baffle in centre, avoid because
The problem for the bottom velocity deficiency that depth is too big and causes;Oxidator of the invention simultaneously provides two kinds of oxygen lead-in modes, can
With the oxygen-supplying amount of revolving speed and bottom micropore aeration pipe by adjusting ceramic disk, the dissolved oxygen flexibly controlled in oxidator is dense
Degree;Furthermore, it is possible to increase agitating device in bottom as needed, the more flexible intracorporal water velocity of adjusting tank is prevented miscellaneous
Matter deposition.
Meanwhile the invention also discloses a kind of sewage water treatment methods, method includes the following steps:
1) sewage is imported the anoxic by pipeline to adjust in tank, sewage is adjusted in tank in the anoxic by can in sewage
What the carbon source in biological decomposition organic matter released, and preformed precipitate is carried out to the impurity in sewage, it is passed through after stopping 10~12h
In the anoxic denitrification tank;
2) the microorganism initial breakdown of apposition growth on the biologic packing material on the anoxic denitrification pot sidewall is utilized
The pollutant in sewage is removed, while using the organic matter in sewage as denitrifying carbon source, to oxidator reflux
Nitrification liquid carries out denitrification denitrogenation;Meanwhile the air demand by controlling the airlift pump quantifies the sewage in lift pot to described
Aeration tank buffers the fluctuation of sewage quality water;
3) solution after denitrification is imported in the aeration tank and carries out Air Exposure, be aerated 3~5h, initial breakdown sewage
In organic matter, and by mineralized nitrogen be nitrate nitrogen;
4) nitration reaction is carried out to sewage by the oxidator, is further nitrate nitrogen by ammonium oxidation, meanwhile, pass through
Nitrification liquid is flowed back into the anoxic denitrification tank by the pipeline of the oxidator bottom setting, makes nitrification liquid in the anti-nitre of the anoxic
Change and the total nitrogen that anti-nitration reaction is gone in water removal occurs in tank;
5) sewage after denitrogenating is passed through 2~3h of standing in the sedimentation basin, sewage and mixed liquor is back to described lack
Oxygen adjusts in tank and carries out circular treatment again, and the clear liquid after precipitating is passed through in the filtering ponds and is filtered, and removes residual in clear liquid
The impurity stayed;
6) filtered clear liquid is imported in the ultrasonic treatment oxidation tank, clear liquid is ultrasonically treated, be ultrasonically treated
After a period of time, aqueous hydrogen peroxide solution is added into tank, the phosphorus element in clear liquid aoxidizes under the action of aqueous hydrogen peroxide solution;
7) clear liquid after ultrasound, oxidation is imported in the blending tank, bentonite and diatom earth mixtures is added into tank,
And mechanical stirring is carried out, mixing speed is 20~30r/min, and after stirring a period of time, reaction solution stops 5h;
8) supernatant in the blending tank is imported in the settling tank, pH value regulation is added in Xiang Suoshu settling tank
Agent, adjusting the settling tank pH is 8.5~9.5;Then polymeric aluminum chlorides solution is sprayed into the blending tank, and controls stirring
Speed is 300~500 r/min, and the clear liquid after reaction is filtered by the filter of the settling tank side;
9) it is passed through in the adsorption tower through precipitating, filtered clear liquid, clear liquid is carried out at absorption by the adsorbent
Reason, can be discharged after processing.
It has been found that be bonded due to being formed between the part phosphorus element meeting contained in sewage and organic matter, and antibiotic
Natural degradation speed is slower.In order to weaken the bonding action between solid phase phosphorus element and organic matter, convenient for being fully dissolved out for phosphorus element, together
The degradation speed of antibiotic, the clear liquid after denitrification, oxidation processes is ultrasonically treated in Shi Tigao sewage mixed liquor,
Phosphorus element and the direct bonding action of organic matter can be weakened, be easy to improve subsequent oxidation release phosphorus and convert the effect of phosphorus;Meanwhile
Ultrasonic treatment, which generates high temperature pyrolysis effect and mechanical effect of ultrasound and ultrasonic wave to organic matter in clear liquid, makes polarity point in liquid
Son generates high speed rotation and generates fuel factor, the activation energy of reaction and the chemical bond strength of molecule is reduced, so as to accelerate liquid
The degradation of antibiotic in body.
In clear liquid after sonicated and oxidation, phosphorus element is released effectively, and antibiotic initial breakdown, at this time
The removal that phosphorus element can be carried out to clear liquid is handled.
It is usually both individually to make although bentonite and diatomite can be used for the purified treatment to water body
With.Compound is made by the proportion to bentonite and diatomite, can be obviously improved to phosphorus element in mud mixed liquid and antibiosis
Effective removing of element.
From the figure 3, it may be seen that the removal effect of total phosphorus is preferable when bentonite and diatomite mass ratio are 60%:40%, it is subsequent
Processing processing provides preferable basis.
Also contain minimal residue object in treated clear liquid, in order to sufficiently remove above-mentioned residue, to after processing
Clear liquid in pH value adjusting control agent is added, adjusting pH is 8.5~9.5, and polyaluminium is then sprayed into settling tank by spray thrower
Aluminum solutions react to form coagulating sedimentation, and control stirring for tank base blender by aluminium polychloride with phosphorus element in mixed liquor
Mixing speed is 300~500r/min.
Due to directly adding aluminium polychloride into sewage and carrying out flocculation dephosphorization, can not only deteriorate its settling property, also can
Reduce dephosphorization efficiency.Different pH value are affected to flocculation precipitation reaction, pass through the continuous research to reaction rate, application
People's discovery, as pH < 9, as pH is increased, tp removal rate is increased;As pH > 9, pH is further increased, tp removal rate reduces,
But reduce amplitude very little.In pH<6 and pH>10, pH is little to the flocculation sedimentation influential effect of aluminium polychloride.Therefore, pH is
Dephosphorization efficiency highest of the aluminium polychloride to clear liquid when 9.
In addition, suitable speed of agitator can make aluminium polychloride rapidly diffuse into the top of clear liquid, temperature in clear liquid and
Concentration more evenly, promotes aluminium ion to contact to form precipitating dephosphorization with phosphorus, but speed of agitator crosses conference and smashes wadding body, hinders precipitating
It is formed, reduces tp removal rate.By the continuous research to reaction rate, it has been found that mixing speed is in 50~500 r/min
In the range of, with the increase of mixing speed, tp removal rate is slightly increased, but it is little to influence variation.
By analysis, Al/P ion molar concentration rate, pH value and speed of agitator during aluminium polychloride dephosphorization in clear liquid
To the function and effect of phosphor-removing effect, the impact effect size of clear liquid dephosphorization process condition be Al/P ion molar concentration rate > pH value >
Mixing speed.
As the concentration of phosphorus element in clear liquid gradually decreases, the phosphorus element of low concentration can not the reaction was continued is purged, this hair
The bright clear liquid by after aluminium polychloride flocculation sedimentation is passed through in adsorption tower after being filtered, can be into one using adsorbent
Step adsorbs phosphorus element, and can effectively remove to antibiotic remaining in sewage.
As further restriction of the invention, parameter is ultrasonically treated in step 6) are as follows: 60~120W of power, frequency 20~
40MHz;The volume ratio of aqueous hydrogen peroxide solution and clear liquid is (5~10): 100;The mass fraction of aqueous hydrogen peroxide solution is 20%
~30%.
It is limited as of the invention further, bentonite and diatomite in bentonite and diatom earth mixtures in step 7)
Mass ratio be 60%:40%, bentonite and diatom earth mixtures dosage are 500mg/L, stir 1-2d, are stopped after stir
5h。
As further restriction of the invention, polymeric aluminum chlorides solution is added into settling tank in step 8), controls institute
The molar concentration rate for stating Al/P ion in settling tank is 2.4~2.7:1.
As seen from Figure 4, the ferric ion molar concentration of iron-based material under the same conditions, the adsorbent of preparation
Sequence to the removal rate of Levofloxacin and Ciprofloxacin is ferric nitrate highest, is secondly ferric sulfate, and worst is iron chloride.Cause
This, in order to improve effective removing to residual antibiotic in clear liquid, the iron-based material in selected adsorbent is carried out using ferric nitrate
Preparation.
Limited as of the invention further, adsorbent the preparation method is as follows: take 5 grams of biomass carbons, be added ultrapure
Water impregnates and ultrasound 10min, dries to constant weight at washing 3 times, 110 DEG C repeatedly;To by being added in pretreated biomass carbon
The concentration of 20mL is the iron nitrate solution of 1mol/L, after stirring for 24 hours at room temperature, is transferred in evaporator, heating temperature is set as
12h is reacted under 60 DEG C and vacuumized conditions, solid material is cooling after taking out, and is washed with deionized water, and is dried in vacuo at 25 DEG C
24 h。
The beneficial effects of the present invention are:
1, the present invention is by effectively combining hypoxia response and aerobic reaction, by the way of aerobic after first anoxic, setting
Two sections of hypoxia responses adjust degradation sewage, and sewage is adjusted in tank and anoxic denitrification tank in anoxic longer residence time, energy
The organic concentration of sewage is enough effectively reduced.
2, biologic packing material is set in anoxic denitrification tank, utilizes the microorganism initial breakdown of apposition growth on biologic packing material
The pollutant in sewage is removed, while making full use of the organic matter in sewage as denitrifying carbon source, at through aerobic nitrification
The reflux nitrification liquid of reason carries out denitrification denitrogenation.
3, the oxidator of above structure of the present invention considerably increases zoneofoxidation by overlapping to oxide regions
The depth in domain, saves system footprint to the greatest extent;Oxidator of the invention provides two kinds of oxygen lead-in modes simultaneously, can be with
By adjusting the revolving speed of ceramic disk and the oxygen-supplying amount of bottom micropore aeration pipe, the dissolved oxygen concentration in oxidator is flexibly controlled;
Furthermore, it is possible to increase agitating device in bottom as needed, the more flexible intracorporal water velocity of adjusting tank prevents impurity heavy
Product.
4, the clear liquid after denitrification, oxidation processes is ultrasonically treated, it is direct with organic matter that phosphorus element can be weakened
Bonding action, be easy to improve subsequent oxidation release phosphorus and convert phosphorus effect;Meanwhile the preliminary of antibiotic in liquid can be accelerated
Degradation.
5, compound is made by the proportion to bentonite and diatomite, can be obviously improved to phosphorus element in sewage mixed liquor
With effective elimination effect of antibiotic.
6, it by addition aluminium polychloride, reacts to form coagulating sedimentation and can further remove mixing with phosphorus element in mixed liquor
The phosphorus element of minimal residue in liquid.
7, by treated, mixed liquor is passed through in adsorption tower the present invention, can be further to free state and solid phase using adsorbent
Phosphorus element is adsorbed, and can overcome the problems, such as that phosphorus element is easy to be lost low with recycling efficiency in liquid phase.
Specific embodiment
It is next combined with specific embodiments below that the present invention is further described.
Referring to Fig.1-2, a kind of sewage-treatment plant, including tank, the anti-nitre of anoxic are adjusted by the sequentially connected anoxic of pipeline
Change tank, aeration tank, oxidator, sedimentation basin, filtering ponds, ultrasonic treatment oxidation tank, blending tank, settling tank, adsorption tower;It is lacked described
Oxygen denitrification tank is internally provided with motor and agitating device, is provided with airlift pump and stripping tube outside the anoxic denitrification tank
Road, the air demand by controlling the airlift pump quantitatively promote the sewage in the anoxic denitrification tank into the aeration tank;
The aeration tank is internally provided with hydrolysis blender and aerator, the uniform stomata that the aerator is arranged by surface to
Oxygen is supplied in the aeration tank, the hydrolysis blender passes through the motor driven agitating shaft being arranged at the top of the aeration tank and turns
It is dynamic;The oxidator bottom is provided with evenly arranged drainage hole, and the drainage hole is connect with drainpipe, and the drainpipe passes through
Water pump is connect with the anoxic denitrification tank;It is provided with the detour baffle for stopping drainage flow in the sedimentation basin, sewage and mixed
It closes liquid and the anoxic adjusting tank is back to by pipeline;The both sides external of the ultrasonic treatment oxidation tank is provided with ultrasonic wave
Device is provided with solution adding mouth at the top of the ultrasonic treatment oxidation tank;There are two agitating device, institutes for setting in the blending tank
Stating agitating device includes agitating shaft and stirring blade, has the paddle by the motor driven belts being arranged at the top of the blending tank
The agitating shaft of piece rotates, and one lateral roof of blending tank is provided with adding mouth;The settling tank is internally provided with spray thrower,
Reagent is added into the settling tank by the spray thrower, the precipitating pot bottom is provided with motor-driven agitating shaft, institute
It states and is provided with filter in the middle part of settling tank side, the clear liquid through the filter passes through pipeline to the adsorption tower;Institute
It states and is filled with adsorbent in adsorption tower, the clear water after the adsorbent adsorption treatment is discharged by pipeline.
Wherein, anoxic denitrification pot sidewall is provided with biologic packing material, using on the biologic packing material apposition growth it is micro-
Biochemical pollutant in biological initial breakdown removal sewage.
Wherein, three layer filtration layer is provided in filtering ponds, from top to bottom successively are as follows: for filter bulky grain first filter layer,
The filter bed of essence of filter small particles and the ultrafiltration layer of filtering molecule;Quartz sand, the filter bed of essence are provided in the first filter layer
In be provided with soft material fiber and particulate filler, be provided with ceramic filter plate in the ultrafiltration layer.
Wherein, oxidator specifically include cabinet, horizontal baffle 4, micropore aeration pipe 3, exhaust level 5, motor 2, retarder and
Aerator 1;Horizontal baffle 4 is set in the middle part of cabinet, for realizing the laminar flow of sewage;Motor, retarder and aerator 1 are set
It is placed in cabinet top, aerator drives rotating shaft rotation by revolution several ceramic disks of axis connection, by motor and retarder
Drive ceramic disk rotation;Exhaust level 5 is arranged in 4 side of horizontal baffle, and the gas after aeration reaction is discharged;Bottom of box setting
Several micropore aeration pipes 3, oxygen is inputted into oxidator.
Wherein, 4 width of horizontal baffle is equal with box width, and 4 baffle length of horizontal flow is more slightly shorter than cabinet length, horizontal
There are water space is crossed between baffle both ends and cabinet, sewage obstructs to be formed vertical cyclic annular time in cabinet around horizontal baffle
It is circulated in road.
A kind of sewage water treatment method, method includes the following steps:
1) sewage is imported the anoxic by pipeline to adjust in tank, sewage is adjusted in tank in the anoxic by can in sewage
What the carbon source in biological decomposition organic matter released, and preformed precipitate is carried out to the impurity in sewage, it is passed through after stopping 10~12h
In the anoxic denitrification tank;
2) the microorganism initial breakdown of apposition growth on the biologic packing material on the anoxic denitrification pot sidewall is utilized
The pollutant in sewage is removed, while using the organic matter in sewage as denitrifying carbon source, to oxidator reflux
Nitrification liquid carries out denitrification denitrogenation;Meanwhile the air demand by controlling the airlift pump quantifies the sewage in lift pot to described
Aeration tank buffers the fluctuation of sewage quality water;
3) solution after denitrification is imported in the aeration tank and carries out Air Exposure, be aerated 3~5h, initial breakdown sewage
In organic matter, and by mineralized nitrogen be nitrate nitrogen;
4) nitration reaction is carried out to sewage by the oxidator, is further nitrate nitrogen by ammonium oxidation, meanwhile, pass through
Nitrification liquid is flowed back into the anoxic denitrification tank by the pipeline of the oxidator bottom setting, makes nitrification liquid in the anti-nitre of the anoxic
Change and the total nitrogen that anti-nitration reaction is gone in water removal occurs in tank;
5) sewage after denitrogenating is passed through 2~3h of standing in the sedimentation basin, sewage and mixed liquor is back to described lack
Oxygen adjusts in tank and carries out circular treatment again, and the clear liquid after precipitating is passed through in the filtering ponds and is filtered, and removes residual in clear liquid
The impurity stayed;
6) filtered clear liquid is imported in the ultrasonic treatment oxidation tank, clear liquid is ultrasonically treated, be ultrasonically treated
After a period of time, aqueous hydrogen peroxide solution is added into tank, the phosphorus element in clear liquid aoxidizes under the action of aqueous hydrogen peroxide solution;
7) clear liquid after ultrasound, oxidation is imported in the blending tank, bentonite and diatom earth mixtures is added into tank,
And mechanical stirring is carried out, mixing speed is 20~30r/min, and after stirring a period of time, reaction solution stops 5h;
8) supernatant in the blending tank is imported in the settling tank, pH value regulation is added in Xiang Suoshu settling tank
Agent, adjusting the settling tank pH is 8.5~9.5;Then polymeric aluminum chlorides solution is sprayed into the blending tank, and controls stirring
Speed is 300~500 r/min, and the clear liquid after reaction is filtered by the filter of the settling tank side;
9) it is passed through in the adsorption tower through precipitating, filtered clear liquid, clear liquid is carried out at absorption by the adsorbent
Reason, can be discharged after processing.
Wherein, parameter is ultrasonically treated in step 6) are as follows: 60~120W of power, 20~40MHz of frequency;Aqueous hydrogen peroxide solution with
The volume ratio of clear liquid is (5~10): 100;The mass fraction of aqueous hydrogen peroxide solution is 20%~30%.
Wherein, the mass ratio of bentonite and diatomite is 60%:40% in bentonite and diatom earth mixtures in step 7),
Bentonite and diatom earth mixtures dosage are 500mg/L, stir 1-2d, stop 5h after having stirred.
Wherein, polymeric aluminum chlorides solution is added into settling tank in step 8), control Al/P ion in the settling tank
Molar concentration rate is 2.4~2.7:1.
Wherein, adsorbent the preparation method is as follows: take 5 grams of biomass carbons, ultrapure water is added and impregnates and ultrasound 10min, instead
After backwashing is washed 3 times, is dried to constant weight at 110 DEG C;The nitre for being 1mol/L to the concentration by 20mL is added in pretreated biomass carbon
Sour ferrous solution after stirring for 24 hours at room temperature, is transferred in evaporator, and heating temperature is set as reacting under 60 DEG C and vacuumized conditions
12h, solid material is cooling after taking out, and is washed with deionized water, and 24 h are dried in vacuo at 25 DEG C.
The present invention is by carrying out anoxic adjusting, anoxic denitrification, aeration, oxidative nitration, precipitating filtering, ultrasonic oxygen to sewage
Change, bentonite and composite diatomite processing, aluminium polychloride coagulating sedimentation, physical absorption continuous processing, can effectively by
Nitrogen, phosphorus element and antibiotic in sewage are sufficiently discharged into sewage, and nitrogen, phosphorus element and antibiotic are effectively removed,
It realizes the harmless treatment to sewage, prevents further pollution of the sewage to existing freshwater resources in short supply.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.