CN112062415B - Domestic sewage treatment system and method for treating domestic sewage by using same - Google Patents
Domestic sewage treatment system and method for treating domestic sewage by using same Download PDFInfo
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- CN112062415B CN112062415B CN202010970591.0A CN202010970591A CN112062415B CN 112062415 B CN112062415 B CN 112062415B CN 202010970591 A CN202010970591 A CN 202010970591A CN 112062415 B CN112062415 B CN 112062415B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The invention discloses a domestic sewage treatment system which comprises an anaerobic treatment system, an aerobic treatment system, a sedimentation system, a disinfection system, a sludge storage system and a power distribution room; the anaerobic treatment system is additionally provided with the packing baffle plate and the rotary packing box, so that the contact time and area of the domestic sewage and the packing are increased, and the starting time is reduced; the undercurrent stirrer is additionally arranged, so that the problems of short current, dead corners and the like are reduced; the volumes of all compartments of the reactor are different, and the degradation efficiency is improved by utilizing the difference of microbial communities; the aerobic treatment system increases the dissolved oxygen by adding the flow baffle and using a mechanical mode, thereby saving the operation cost; the different-wave baffle plate is utilized, the retention time of the inflow water is prolonged, the surface of the baffle plate is rough, the membrane is easy to hang on the baffle plate, and the treatment efficiency is improved; by adding the modified combined suspended filler, the filler film forming efficiency is improved; also discloses a method for treating domestic sewage by using the domestic sewage treatment system, which has the advantages of whole-course biochemical treatment, no medicament investment and reduction of secondary pollution.
Description
Technical Field
The invention belongs to the technical field of domestic sewage treatment processes, and particularly relates to a domestic sewage treatment system and a method for treating domestic sewage by using the same.
Background
The anaerobic baffle reactor is obtained by improving and developing researchers such as McCarty of Stanford university in America when researching an anaerobic biological rotating disc reactor, and is called ABR (anaerobic Baffled reactor) for short. The reactor has the advantages of good composite flow state, simple structure, strong biological interception capability, high efficiency, stability and the like, so that the reactor becomes one of the research hotspots of the anaerobic biological treatment technology of wastewater. However, in the prior art, the baffle plate of the reactor only plays the role of a baffle plate and is not fully utilized; according to research, the microbial community structure, the pH value and the product of the organic matters after anaerobic digestion exist differently in each compartment, but the volume of each compartment in the prior art is the same or only the volume of the first compartment is enlarged, the volume ratio range of each compartment is not given, the starting time of the ABR reactor is delayed, and the treatment efficiency of the reactor is reduced; at the initial stage of starting the reactor or when treating low-concentration sewage, because the gas production is limited and the disturbance is insufficient, the film forming effect of the filler is poor, the mixing degree in the reactor is low, and a series of problems such as short flow, dead angles, blockage and the like are easy to occur.
The activated sludge process, an aerobic biological treatment of sewage, was first invented in 1914 by Edward Ardern and William T. Lockett in the United kingdom. This technique mixes and agitates the wastewater with activated sludge (microorganisms) and aerates to break down organic contaminants in the wastewater, and biosolids are subsequently separated from the treated wastewater. The activated sludge method and the improved process still have the problems of insufficient biomass, low utilization rate of the filler, insufficient utilization of a reactor separation area and the like; the suspended filler mainly uses high molecular organic matters such as polyethylene, polypropylene, polyurethane and the like as materials, has the advantages of compression resistance, corrosion resistance, wear resistance, smoothness, aging resistance and the like, but also has the defect of poor hydrophilic and biological properties, thereby causing the slow film forming speed of the filler, less film forming amount and influencing the overall sewage treatment efficiency.
Disclosure of Invention
The first purpose of the invention is to provide a domestic sewage treatment system, the said domestic sewage treatment system includes the anaerobic treatment system, the aerobic treatment system, the sedimentation system, the disinfection system, the storage system of the mud and electricity distribution room 43, wherein the anaerobic treatment system sets up the baffling board of packing, rotates the packing box, dive agitator, not merely improve the biomass of the anaerobic treatment system, has increased the area of contact of sewage and microorganism, has reduced the short flow, dead angle and problem of the jam, and utilize the volume difference of every compartment effectively, has raised the organic matter degradation efficiency; the aerobic treatment system is additionally provided with the flow baffle at the water outlet to enable the inlet water to be in a waterfall shape, so that the dissolved oxygen of the domestic sewage is increased in a mechanical mode, the energy consumption is reduced, and the sewage treatment cost is saved; the aerobic chamber improves the film forming speed and the film forming amount of the filler by adding the modified combined suspended filler balls, reduces the starting time of the reactor, and increases the tolerance degree of microorganisms to organic load; the iso-wave baffle is arranged in the aerobic chamber, the surface is rough, microorganisms can form a biological film on the surface of the aerobic chamber, the contact area between sewage and the biological film is increased, and the sewage treatment efficiency can be effectively improved; the sedimentation system effectively separates the inlet water from the movable sludge by arranging a sedimentation zone, a clear water zone and a sludge hopper; the disinfection system realizes disinfection and decoloration through ozone, and ensures that the effluent stably reaches the standard.
The second purpose of the invention is to provide a method for treating domestic sewage by using the domestic sewage treatment system, no medicament is added in the operation process of the method, biochemical treatment is carried out in the whole process, the starting time of the domestic sewage treatment system is shortened, the operation cost is saved, the effluent quality stably reaches the first-class A standard of pollutant discharge Standard of municipal wastewater treatment plant (GB 18918-2002), secondary pollution is reduced, and the method for treating the domestic sewage is economical, environment-friendly, efficient and convenient.
The invention is realized by the following technical scheme:
a domestic sewage treatment system comprises an anaerobic treatment system, an aerobic treatment system, a precipitation system, a disinfection system, a sludge storage system and a power distribution chamber 43, wherein the anaerobic treatment system, the aerobic treatment system, the precipitation system and the disinfection system are sequentially communicated through a pipeline, the precipitation system and the sludge storage system are communicated through a pipeline, and the power distribution chamber 43 is used for supplying power for the anaerobic treatment system, the aerobic treatment system, the precipitation system, the disinfection system and the sludge storage system;
the anaerobic treatment system comprises an anaerobic chamber 1, an anaerobic treatment system water inlet 2, a rotary stuffing box 3, a gas collection port 4, a rotary shaft 7, a rotary motor 8, a stuffing baffle plate 5, a submersible stirrer 9, a sludge return port 10, a sludge return pipe 11 and an anaerobic treatment system water outlet 12; the anaerobic chamber is divided into a first compartment 15, a second compartment 16, a third compartment 17 and a fourth compartment 18 by three pairs of packing baffles; each pair of packing baffles comprises an upward flow packing baffle 51 and a downward flow packing baffle 52; the bottom of the upward flow packing baffle plate 51 is connected with the bottom of the anaerobic chamber, and the top of the upward flow packing baffle plate is suspended; the top of the downflow packing baffle plate 52 is connected with the anaerobic chamber, and the bottom is suspended; the downflow packing baffle 52 separates the first compartment 15, the second compartment 16, the third compartment 17 and the fourth compartment 18 into an upflow cell chamber 13 and a downflow cell chamber 14, respectively;
the packing baffle plate 5 comprises a rectangular frame body 53, a combined suspension packing ball 6 and a right frame plate 54; a plurality of groups of cross beams 55 arranged in parallel are arranged on the left side of the rectangular frame body 53, and a right frame plate 54 is arranged on the right side;
the rotary stuffing box 3 is positioned in the upward flow grid chamber 13, is of a cylindrical structure with a hollow interior and a grid-shaped exterior, and is connected with the rotary motor 8 through the rotary shaft 7; the rotating motor 8 is arranged at the top of the air collecting port 4 and is used for driving the rotating stuffing box 3 to rotate slowly; the bottom of the first compartment 15, the second compartment 16 and the third compartment 17 is provided with a submersible stirrer 9; the bottom of the first compartment 15, the bottom of the second compartment 16, the bottom of the third compartment 17 and the bottom of the fourth compartment 18 are provided with sludge return ports 10, the bottom of the fourth compartment 18 is provided with a sludge return pump 181, and the sludge return pump 181 returns sludge in the fourth compartment 18 to the first compartment 15, the second compartment 16 and the third compartment 17 through a sludge return pipe 11; the water outlet 12 of the anaerobic treatment system is positioned at the upper part of the right side wall of the anaerobic chamber 1;
the aerobic treatment system comprises an aerobic chamber 19, an aerobic treatment system water inlet 20, a flow baffle 21, modified combined suspended filler balls 22, a microporous aerator 23, a different-wave baffle 24 and an aerobic treatment system water outlet 25; the water inlet 20 of the aerobic treatment system is positioned above the left side wall of the aerobic chamber 19; the flow baffle plate 21 is arranged on the side wall of the aerobic chamber 19 below the water inlet 20 of the aerobic treatment system, the bottom of the flow baffle plate 21 is arc-shaped, and the outer brim of the flow baffle plate 21 extends outwards and inclines downwards;
the modified combined suspension filler ball 22 is internally made of modified reticulated polyurethane foam plastic, and the outside of the modified combined suspension filler ball is wrapped by modified porous rotary spherical suspension filler;
the microporous aerators 23 are uniformly arranged at the bottom of the aerobic chamber 19; the different wave baffle plate 24 divides the aerobic chamber 19 into two areas, and a communication port 26 is arranged below the different wave baffle plate 24 to connect the two areas; the water outlet 25 of the aerobic treatment system is positioned above the right side wall of the aerobic chamber 19;
the sedimentation system consists of a sedimentation zone 27, a clear water zone 28 and a sludge hopper 29; the upper part of the left side wall of the settling zone 27 is provided with a settling system water inlet 30, the middle part is provided with an inclined plate cleaner 31, and the lower part is connected with a sludge hopper 29; the settling zone 27 is connected with the clear water zone 28 through a connecting port 32; the lower part of the clear water area 28 is connected with a sludge hopper 29; the sludge bucket 29 at the lower part of the settling zone 27 and the sludge bucket 29 at the lower part of the clear water zone 28 are both provided with sludge discharge ports 33, and the two sludge discharge ports 33 are connected and converged through a pipeline and then connected with a sludge discharge pump 34; the outlet pipeline of the sludge discharge pump 34 is divided into two paths, one path is connected with the top of the aerobic chamber 19, and the other path is connected with the sludge storage system 42;
the disinfection system consists of an ozone generator 36 and a disinfection system main body 37; a disinfection system water inlet 38 is arranged above the left side wall of the disinfection system main body 37, a miniature aerator 39 is arranged at the bottom of the disinfection system main body and is connected with an ozone generator 36 through a pipeline, and a disinfection system water outlet 40 is arranged below the right side wall of the disinfection system; a disinfection system air collecting port 41 is arranged above the disinfection system main body, and collected gas is circulated to an air inlet pipeline through a pipeline;
furthermore, the horizontal width ratio of the first compartment 15, the second compartment 16, the third compartment 17 and the fourth compartment 18 is 3: 1: 1: 2; the volume ratio of the upward flow cell chambers 13 to the downward flow cell chambers 14 ranges from 5:1 to 3: 1.
Also, the composite suspending filler ball 6 includes an inner reticulated polyurethane foam and an outer porous rotating spherical suspending filler; the reticulated polyurethane foam has a size of 2CM x 2 CM; the diameter of the combined suspending filler balls 6 is 100 mm.
Moreover, the horizontal width of the rectangular frame body 53 is smaller than the diameter of one combined suspension filler ball 6, and the material is PVC plastic; the right frame plate 54 is a PVC solid plate with a rough surface; the distance between the cross beams 55 is less than the diameter 6 of a combined suspension packing ball; the diameter of the grid of the rotary stuffing box 3 is smaller than that of the combined suspension stuffing ball 6, and the combined suspension stuffing ball 6 is filled in the rotary stuffing box; the distance between the rotary stuffing box 3 and the stuffing baffle plates 5 on the two sides and the side wall of the anaerobic chamber 1 is 2-3 CM.
Moreover, the manufacturing method of the modified combined suspension filler ball 22 specifically comprises the following steps:
(1) soaking the reticular polyurethane foam plastic and the lockhole rotating spherical suspension filler in a potassium permanganate solution at 60 ℃ for 4h under the condition of continuous aeration, taking out, and washing with a 6mol/L hydrochloric acid solution until a brown layer on the surface is washed away;
(2) fully washing the filler by using 0.01mol/L PBS buffer solution until the filler is neutral, and naturally airing the filler;
(3) soaking the filler in a 5% glutaraldehyde solution at 37 ℃ for 24h, taking out, soaking in a 1g/L gelatin solution for 24h, taking out, fully washing, and naturally drying.
Moreover, the flow baffle 21 is made of stainless steel; the size of the reticular modified polyurethane foam plastic is 2CM multiplied by 2 CM; the diameter of the modified combined suspension filler ball 22 is 100 mm.
Moreover, the material of the different-wave baffle plate 24 is PVC, and the different-wave baffle plate is formed by connecting plates with the same area at an included angle alpha 44 of 30-60 degrees, and the surfaces of the plates are rough to polish.
The invention also provides a method for treating domestic sewage by using the domestic sewage treatment system, which comprises the following steps:
step 1: anaerobic sludge of a domestic sewage treatment plant is inoculated in the anaerobic treatment system, and sludge in an aerobic tank of the domestic sewage treatment plant is inoculated in the aerobic treatment system; a combined suspended filler ball 6 is arranged in a rotating filler box 3 and a filler baffle plate 5 of an anaerobic treatment system, a modified combined suspended filler ball 22 is arranged in an aerobic treatment system, and domestic sewage treatment equipment is started;
step 2: domestic sewage enters the anaerobic treatment system through a water inlet 2 of the anaerobic treatment system, the domestic sewage sequentially passes through a first compartment 15, a second compartment 16, a third compartment 17 and a fourth compartment 18, a rotary stuffing box 3 is slowly rotated in the process, the sewage passes through a hydrolysis stage, an acid-producing fermentation stage, an ammonia-producing acetic acid-producing stage and a methane-producing stage, macromolecular organic matters in the sewage are gradually degraded into small molecular substances, and generated gas is collected through a gas collecting port 4;
and step 3: after the domestic sewage is treated by the anaerobic treatment system, the effluent enters the aerobic treatment system, and organic matters in the sewage are further degraded; the sewage enters a sedimentation system after being treated by an aerobic treatment system, the sludge enters a sludge hopper 29, part of the sludge flows back to the aerobic treatment system to supplement microorganisms for the aerobic treatment system, and the rest sludge enters a sludge collection system; the effluent of the precipitation system enters a disinfection system, and is reused as reclaimed water after being disinfected and decolorized by ozone;
moreover, the reaction time ratio of the domestic sewage in the anaerobic treatment system, the aerobic treatment system, the sedimentation system and the disinfection system is 6:10:3: 1.
Furthermore, the rotational speed of the rotating stuffing box 3 is 1-3.5 rpm.
The invention has the following beneficial effects:
1. the anaerobic treatment system is divided into four compartments with different volumes by the filling baffle plate, so that the volumes of the first compartment and the fourth compartment are increased, the problems of high organic load of water inflow and short hydraulic retention time of the first compartment are effectively solved, the relative expansion of the volume of the fourth compartment is beneficial to full contact of methanogenic flora and domestic sewage, and the problems of slow growth, low metabolic rate and sensitivity to environmental change of the methanogenic flora are solved.
2. The anaerobic treatment system is provided with the filler baffle plate, the filler baffle plate can be used as the baffle plate to divide an anaerobic chamber into four compartments, and can also be used for treating sewage by utilizing a bacterial membrane formed by internally combining and suspending filler balls, the right frame plate is a rough PVC solid plate, and the bacterial membrane can also be formed on the surface of the right frame plate, so that the contact time and the contact area of domestic sewage and microorganisms are increased, and the organic matter degradation efficiency is improved.
3. The anaerobic treatment system is provided with the rotary filler box, and the inside of the rotary filler box is filled with the combined suspension filler balls, so that the problem that the suspension filler balls cannot be fixed and can flow into other compartments along with water flow in the prior art is solved; the rotating stuffing box is driven by the rotating motor to rotate slowly, so that the contact area of microorganisms and biological sewage is increased, disturbance is formed, and the problems of short flow, dead angles and blockage in the anaerobic reaction chamber are solved.
4. The submersible stirrers are arranged at the bottoms of the first, second and third compartments of the anaerobic treatment system, so that the problem that hydraulic dead zones are easy to occur at the bottom of the reactor and flow expansion corners is solved; the precipitated sludge in the fourth compartment flows back to the first three compartments, so that the biomass of the first three compartments is ensured, the sludge loss is reduced, and the treatment effect of the domestic sewage is ensured.
5. The flow baffle is added below the water inlet of the aerobic treatment system, so that the inflow water forms a waterfall shape after passing through the flow baffle, the dissolved oxygen of the water body is increased in a mechanical mode, the dissolved oxygen can reach 0.9mg/L-1.0mg/L, the dissolved oxygen of the effluent of the anaerobic treatment system is 0.2mg/L-0.35mg/L, the increase rate of the dissolved oxygen is not lower than 350 percent after the flow baffle is added, the energy consumption is reduced, and the sewage treatment cost is reduced.
6. According to the invention, the modified combined suspended filler balls are added in the aerobic chamber, through modification, the hydrophilicity of the filler is improved, the filler film formation can be completed in 5 days, the film formation speed of the filler is accelerated, the biomass is increased, the starting time of an aerobic treatment system is shortened, and the sewage treatment effect is improved.
7. The aerobic chamber is divided into different areas by the different-wave baffle plates, so that short water inflow is prevented, and the problem that the treatment effect is influenced because sewage directly flows out is solved; the iso-wave baffle is rough, the microorganism is easy to form a biological membrane on the surface of the iso-wave baffle, the contact area of the sewage and the biological membrane is increased, and the COD removal rate is improved from 85% to more than 91%.
8. The activated sludge at the sludge discharge port of the sedimentation system partially flows back into the aerobic treatment system, so that the problem of biomass loss of the aerobic treatment system is effectively solved; ozone is collected by the gas collection port at the top of the disinfection system and then circulated to the gas inlet pipe, so that the loss of ozone is reduced, the treatment cost of domestic sewage is reduced, effluent can be decolorized and disinfected by ozone, the number of escherichia coli in the effluent is lower than 3, the chromaticity is lower than 20, the effluent quality meets the requirement of urban miscellaneous water quality for urban sewage recycling (GB/T18920-2002), and the ozone can be recycled as reclaimed water.
9. The domestic sewage treatment system is used for treating domestic sewage, no medicament is added in the treatment process, biochemical treatment is carried out in the whole process, the starting time of the domestic sewage treatment system is short, the operation cost is low, the quality of effluent can stably reach the primary A standard of pollutant discharge Standard of urban sewage treatment plant (GB 18918-2002), secondary pollution is reduced, and a treatment method which is economical, environment-friendly, efficient and convenient is provided for the treatment of the domestic sewage.
Drawings
FIG. 1 is a schematic view of a domestic sewage treatment system;
FIG. 2 is a schematic structural diagram of an anaerobic treatment system and an aerobic treatment system;
FIG. 3 is a schematic diagram of a sedimentation system and a disinfection system;
FIG. 4 is a schematic view of a packed baffle configuration;
FIG. 5 is a schematic view of a rotating stuffing box construction;
in the figure, 1-anaerobic chamber, 2-anaerobic system water inlet, 3-rotating packing box, 4-gas collection port, 5-packing baffle plate, 51-upward flow packing baffle plate, 52-downward flow packing baffle plate, 53-rectangular frame body, 54-right frame plate, 55-cross beam, 6-combined suspension packing ball, 7-rotating pump, 8-rotating motor, 9-diving agitator, 10-sludge return port, 11-sludge return pipe, 12-anaerobic treatment system water outlet, 13-upward flow cell, 14-downward flow cell, 15-first cell, 16-second cell, 17-third cell, 18-fourth cell, 181-return pump, 19-aerobic chamber, 20-aerobic treatment system water inlet, 21-baffle plate, 22-modified combined suspension packing ball, 23-microporous aerator, 24-isobavanic baffle plate, 25-aerobic system water outlet, 26-communication port, 27-settling zone, 28-clear water zone, 29-sludge hopper, 30-settling system water inlet, 31-inclined plate cleaner, 32-connecting port, 33-sludge discharge port, 34-sludge discharge pump, 35-settling system water outlet, 36-ozone generator, 37-disinfection system main body, 38-disinfection system water inlet, 39-micro aerator, 40-disinfection system water outlet, 41-disinfection system air collecting port, 42-sludge storage system, 43-electricity distribution chamber, and 44-different wave baffle included angle.
Detailed Description
The present invention will be described in further detail with reference to the following examples, but the embodiments of the present invention are not limited thereto, and the scope of the present invention is not limited by the following examples.
The experimental methods used in the following examples are all conventional methods unless otherwise specified; the materials, reagents and the like used are commercially available unless otherwise specified.
Example 1
As shown in fig. 1-5, a domestic sewage treatment system comprises an anaerobic treatment system, an aerobic treatment system, a sedimentation system, a disinfection system, a sludge storage system and a power distribution chamber 43, wherein the anaerobic treatment system, the aerobic treatment system, the sedimentation system and the disinfection system are sequentially communicated through a pipeline, the sedimentation system and the sludge storage system are communicated through a pipeline, and the power distribution chamber 43 supplies power for the anaerobic treatment system, the aerobic treatment system, the sedimentation system, the disinfection system and the sludge storage system;
the anaerobic treatment system comprises an anaerobic chamber 1, an anaerobic treatment system water inlet 2, a rotary stuffing box 3, a gas collection port 4, a rotary shaft 7, a rotary motor 8, a stuffing baffle plate 5, a submersible stirrer 9, a sludge return port 10, a sludge return pipe 11 and an anaerobic treatment system water outlet 12; the anaerobic chamber is divided into a first compartment 15, a second compartment 16, a third compartment 17 and a fourth compartment 18 by three pairs of packing baffles; each pair of packing baffles comprises an upward flow packing baffle 51 and a downward flow packing baffle 52; the bottom of the upward flow packing baffle plate 51 is connected with the bottom of the anaerobic chamber, and the top of the upward flow packing baffle plate is suspended; the top of the downflow packing baffle plate 52 is connected with the anaerobic chamber, and the bottom is suspended; the downflow packing baffle 52 separates the first compartment 15, the second compartment 16, the third compartment 17 and the fourth compartment 18 into an upflow cell chamber 13 and a downflow cell chamber 14, respectively;
the packing baffle plate 5 comprises a rectangular frame body 53, a combined suspension packing ball 6 and a right frame plate 54; a plurality of groups of cross beams 55 arranged in parallel are arranged on the left side of the rectangular frame body 53, and a right frame plate 54 is arranged on the right side;
the rotary stuffing box 3 is positioned in the upward flow grid chamber 13, is of a cylindrical structure with a hollow interior and a grid-shaped exterior, and is connected with the rotary motor 8 through the rotary shaft 7; the rotating motor 8 is arranged at the top of the air collecting port 4 and is used for driving the rotating stuffing box 3 to rotate slowly; the bottom of the first compartment 15, the second compartment 16 and the third compartment 17 is provided with a submersible stirrer 9; the bottom of the first compartment 15, the bottom of the second compartment 16, the bottom of the third compartment 17 and the bottom of the fourth compartment 18 are provided with sludge return ports 10, the bottom of the fourth compartment 18 is provided with a sludge return pump 181, and the sludge return pump 181 returns sludge in the fourth compartment 18 to the first compartment 15, the second compartment 16 and the third compartment 17 through a sludge return pipe 11; the water outlet 12 of the anaerobic treatment system is positioned at the upper part of the right side wall of the anaerobic chamber 1;
the aerobic treatment system comprises an aerobic chamber 19, an aerobic treatment system water inlet 20, a flow baffle 21, modified combined suspended filler balls 22, a microporous aerator 23, a different-wave baffle 24 and an aerobic treatment system water outlet 25; the water inlet 20 of the aerobic treatment system is positioned above the left side wall of the aerobic chamber 19; the flow baffle plate 21 is arranged on the side wall of the aerobic chamber 19 below the water inlet 20 of the aerobic treatment system, the bottom of the flow baffle plate 21 is arc-shaped, and the outer brim of the flow baffle plate 21 extends outwards and inclines downwards;
the modified combined suspension filler ball 22 is internally made of modified reticulated polyurethane foam plastic, and the outside of the modified combined suspension filler ball is wrapped by modified porous rotary spherical suspension filler;
the microporous aerators 23 are uniformly arranged at the bottom of the aerobic chamber 19; the different wave baffle plate 24 divides the aerobic chamber 19 into two areas, and a communication port 26 is arranged below the different wave baffle plate 24 to connect the two areas; the water outlet 25 of the aerobic treatment system is positioned above the right side wall of the aerobic chamber 19;
the sedimentation system consists of a sedimentation zone 27, a clear water zone 28 and a sludge hopper 29; the upper part of the left side wall of the settling zone 27 is provided with a settling system water inlet 30, the middle part is provided with an inclined plate cleaner 31, and the lower part is connected with a sludge hopper 29; the settling zone 27 is connected with the clear water zone 28 through a connecting port 32; the lower part of the clear water area 28 is connected with a sludge hopper 29; the sludge bucket 29 at the lower part of the settling zone 27 and the sludge bucket 29 at the lower part of the clear water zone 28 are both provided with sludge discharge ports 33, and the two sludge discharge ports 33 are connected and converged through a pipeline and then connected with a sludge discharge pump 34; the outlet pipeline of the sludge discharge pump 34 is divided into two paths, one path is connected with the top of the aerobic chamber 19, and the other path is connected with the sludge storage system 42;
the disinfection system consists of an ozone generator 36 and a disinfection system main body 37; a disinfection system water inlet 38 is arranged above the left side wall of the disinfection system main body 37, a miniature aerator 39 is arranged at the bottom of the disinfection system main body and is connected with an ozone generator 36 through a pipeline, and a disinfection system water outlet 40 is arranged below the right side wall of the disinfection system; a disinfection system air collecting port 41 is arranged above the disinfection system main body, and collected gas is circulated to an air inlet pipeline through a pipeline;
in this embodiment, the horizontal width ratio of the first compartment 15, the second compartment 16, the third compartment 17 and the fourth compartment 18 is 3: 1: 1: 2; the volume ratio of the upward flow cell chambers 13 to the downward flow cell chambers 14 ranges from 5:1 to 3: 1.
In the present embodiment, the combined suspended filler ball 6 comprises an inner reticulated polyurethane foam and an outer porous rotating spherical suspended filler; the reticulated polyurethane foam has a size of 2CM x 2 CM; the diameter of the combined suspending filler balls 6 is 100 mm.
In this embodiment, the horizontal width of the rectangular frame body 53 is smaller than the diameter of one combined suspension filler ball 6, and the material is PVC plastic; the right frame plate 54 is a PVC solid plate with a rough surface; the distance between the cross beams 55 is smaller than the diameter 6 of a combined suspension packing ball; the diameter of the grid of the rotary stuffing box 3 is smaller than that of the combined suspension stuffing ball 6, and the combined suspension stuffing ball 6 is filled in the rotary stuffing box; the distance between the rotary stuffing box 3 and the stuffing baffle plates 5 on the two sides and the side wall of the anaerobic chamber 1 is 2-3 CM.
In this embodiment, the method for manufacturing the modified combined suspension filler ball 22 specifically includes the following steps:
(1) soaking the reticulated polyurethane foam plastic and the lockhole rotating spherical suspended filler in a potassium permanganate solution at 60 ℃ for 4 hours under the condition of continuous aeration, taking out, and washing with a 6mol/L hydrochloric acid solution until a brown layer on the surface is washed away;
(2) fully washing the filler by using 0.01mol/L PBS buffer solution until the filler is neutral, and naturally airing the filler;
(3) soaking the filler in a 5% glutaraldehyde solution at 37 ℃ for 24h, taking out, soaking in a 1g/L gelatin solution for 24h, taking out, fully washing, and naturally drying.
In this embodiment, the flow baffle 21 is made of stainless steel; the size of the reticular modified polyurethane foam plastic is 2CM multiplied by 2 CM; the diameter of the modified combined suspension filler ball 22 is 100 mm.
In this embodiment, the material of the different-wave baffle plate 24 is PVC, and the different-wave baffle plate is formed by connecting plates with the same area at an included angle α 44 of 30 ° to 60 °, and the surfaces of the plates are roughened.
The invention also provides a method for treating domestic sewage by using the domestic sewage treatment system, which comprises the following steps:
step 1: anaerobic sludge of a domestic sewage treatment plant is inoculated in the anaerobic treatment system, and sludge in an aerobic tank of the domestic sewage treatment plant is inoculated in the aerobic treatment system; a combined suspended filler ball 6 is arranged in a rotating filler box 3 and a filler baffle plate 5 of an anaerobic treatment system, a modified combined suspended filler ball 22 is arranged in an aerobic treatment system, and domestic sewage treatment equipment is started;
step 2: domestic sewage enters the anaerobic treatment system through a water inlet 2 of the anaerobic treatment system, the domestic sewage sequentially passes through a first compartment 15, a second compartment 16, a third compartment 17 and a fourth compartment 18, a rotary stuffing box 3 is slowly rotated in the process, the sewage passes through a hydrolysis stage, an acid-producing fermentation stage, an ammonia-producing acetic acid-producing stage and a methane-producing stage, macromolecular organic matters in the sewage are gradually degraded into small molecular substances, and generated gas is collected through a gas collecting port 4;
and step 3: after the domestic sewage is treated by the anaerobic treatment system, the effluent enters the aerobic treatment system, and organic matters in the sewage are further degraded; the sewage enters a sedimentation system after being treated by an aerobic treatment system, the sludge enters a sludge hopper 29, part of the sludge flows back to the aerobic treatment system to supplement microorganisms for the aerobic treatment system, and the rest sludge enters a sludge collection system; the effluent of the precipitation system enters a disinfection system, and is reused as reclaimed water after being disinfected and decolorized by ozone;
in the implementation, the reaction time ratio of the domestic sewage in the anaerobic treatment system, the aerobic treatment system, the sedimentation system and the disinfection system is 6:10:3: 1.
In this embodiment, the rotating speed of the rotating stuffing box 3 is 1-3.5 rpm.
Example 2
Application background: according to the general plan of a town city called Daltadi forest, 1 sewage treatment plant is newly built at the northeast of the township, the engineering sewage treatment plant is subjected to civil engineering design according to the scale of 30,000m3/d, and equipment is configured according to the scale of 3,0000 m 3/d.
In order to ensure that the quality of effluent water of a sewage treatment plant stably reaches the first-class A standard of pollutant discharge Standard of municipal wastewater treatment plant (GB 18918-2002), the plant adopts a domestic sewage treatment system as shown in figures 1-5 to treat domestic sewage.
The anaerobic treatment system comprises an anaerobic chamber 1, an anaerobic treatment system water inlet 2, a rotary stuffing box 3, a gas collection port 4, a rotary shaft 7, a rotary motor 8, a stuffing baffle plate 5, a submersible stirrer 9, a sludge return port 10, a sludge return pipe 11 and an anaerobic treatment system water outlet 12; the anaerobic chamber is divided into a first compartment 15, a second compartment 16, a third compartment 17 and a fourth compartment 18 by three pairs of packing baffles; each pair of packing baffles comprises an upward flow packing baffle 51 and a downward flow packing baffle 52; the bottom of the upward flow packing baffle plate 51 is connected with the bottom of the anaerobic chamber, and the top of the upward flow packing baffle plate is suspended; the top of the downflow packing baffle plate 52 is connected with the anaerobic chamber, and the bottom is suspended; the downflow packing baffle 52 separates the first compartment 15, the second compartment 16, the third compartment 17 and the fourth compartment 18 into an upflow cell chamber 13 and a downflow cell chamber 14, respectively;
the packing baffle plate 5 comprises a rectangular frame body 53, a combined suspension packing ball 6 and a right frame plate 54; a plurality of groups of cross beams 55 arranged in parallel are arranged on the left side of the rectangular frame body 53, and a right frame plate 54 is arranged on the right side;
the rotary stuffing box 3 is positioned in the upward flow grid chamber 13, is of a cylindrical structure with a hollow interior and a grid-shaped exterior, and is connected with the rotary motor 8 through the rotary shaft 7; the rotating motor 8 is arranged at the top of the air collecting port 4 and is used for driving the rotating stuffing box 3 to rotate slowly; the bottom of the first compartment 15, the second compartment 16 and the third compartment 17 is provided with a submersible stirrer 9; the bottom of the first compartment 15, the bottom of the second compartment 16, the bottom of the third compartment 17 and the bottom of the fourth compartment 18 are provided with sludge return ports 10, the bottom of the fourth compartment 18 is provided with a sludge return pump 181, and the sludge return pump 181 returns sludge in the fourth compartment 18 to the first compartment 15, the second compartment 16 and the third compartment 17 through a sludge return pipe 11; the water outlet 12 of the anaerobic treatment system is positioned at the upper part of the right side wall of the anaerobic chamber 1;
the aerobic treatment system comprises an aerobic chamber 19, an aerobic treatment system water inlet 20, a flow baffle 21, modified combined suspended filler balls 22, a microporous aerator 23, a iso-wave baffle 24 and an aerobic treatment system water outlet 25; the water inlet 20 of the aerobic treatment system is positioned above the left side wall of the aerobic chamber 19; the flow baffle plate 21 is arranged on the side wall of the aerobic chamber 19 below the water inlet 20 of the aerobic treatment system, the bottom of the flow baffle plate 21 is arc-shaped, and the outer brim of the flow baffle plate 21 extends outwards and inclines downwards;
in the implementation, the inflow water of the aerobic treatment system forms a waterfall shape after passing through the flow baffle, the dissolved oxygen of the water body is increased in a mechanical mode, the dissolved oxygen can reach 0.9mg/L, the dissolved oxygen of the effluent water of the anaerobic treatment system is 0.2mg/L, the dissolved oxygen increasing rate is 350%, and the energy consumption is reduced.
The modified combined suspension filler ball 22 is internally made of modified reticulated polyurethane foam plastic, and the outside of the modified combined suspension filler ball is wrapped by modified porous rotary spherical suspension filler;
the microporous aerators 23 are uniformly arranged at the bottom of the aerobic chamber 19; the different wave baffle plate 24 divides the aerobic chamber 19 into two areas, and a communication port 26 is arranged below the different wave baffle plate 24 to connect the two areas; the water outlet 25 of the aerobic treatment system is positioned above the right side wall of the aerobic chamber 19;
the sedimentation system consists of a sedimentation zone 27, a clear water zone 28 and a sludge hopper 29; the upper part of the left side wall of the settling zone 27 is provided with a settling system water inlet 30, the middle part is provided with an inclined plate cleaner 31, and the lower part is connected with a sludge hopper 29; the settling zone 27 is connected with the clear water zone 28 through a connecting port 32; the lower part of the clear water area 28 is connected with a sludge hopper 29; the sludge bucket 29 at the lower part of the settling zone 27 and the sludge bucket 29 at the lower part of the clear water zone 28 are both provided with sludge discharge ports 33, and the two sludge discharge ports 33 are connected and converged through a pipeline and then connected with a sludge discharge pump 34; the outlet pipeline of the sludge discharge pump 34 is divided into two paths, one path is connected with the top of the aerobic chamber 19, and the other path is connected with the sludge storage system 42;
the disinfection system consists of an ozone generator 36 and a disinfection system main body 37; a disinfection system water inlet 38 is arranged above the left side wall of the disinfection system main body 37, a miniature aerator 39 is arranged at the bottom of the disinfection system main body and is connected with an ozone generator 36 through a pipeline, and a disinfection system water outlet 40 is arranged below the right side wall of the disinfection system; a disinfection system air collecting port 41 is arranged above the disinfection system main body, and collected gas is circulated to an air inlet pipeline through a pipeline;
in this embodiment, the horizontal width ratio of the first compartment 15, the second compartment 16, the third compartment 17 and the fourth compartment 18 is 3: 1: 1: 2; the volume ratio of the upward flow cell chambers 13 to the downward flow cell chambers 14 ranges from 5:1 to 3: 1.
In the present embodiment, the combined suspended filler ball 6 comprises an inner reticulated polyurethane foam and an outer porous rotating spherical suspended filler; the reticulated polyurethane foam has a size of 2CM x 2 CM; the diameter of the combined suspending filler balls 6 is 100 mm.
In this embodiment, the horizontal width of the rectangular frame body 53 is smaller than the diameter of one combined suspension filler ball 6, and the material is PVC plastic; the right frame plate 54 is a PVC solid plate with a rough surface; the distance between the cross beams 55 is smaller than the diameter 6 of a combined suspension packing ball; the diameter of the grid of the rotary stuffing box 3 is smaller than that of the combined suspension stuffing ball 6, and the combined suspension stuffing ball 6 is filled in the rotary stuffing box; the distance between the rotary stuffing box 3 and the stuffing baffle plates 5 on the two sides and the side wall of the anaerobic chamber 1 is 3 CM.
In this embodiment, the method for manufacturing the modified combined suspension filler ball 22 specifically includes the following steps:
(1) soaking the reticulated polyurethane foam plastic and the lockhole rotating spherical suspended filler in a potassium permanganate solution at 60 ℃ for 4 hours under the condition of continuous aeration, taking out, and washing with a 6mol/L hydrochloric acid solution until a brown layer on the surface is washed away;
(2) fully washing the filler by using 0.01mol/L PBS buffer solution until the filler is neutral, and naturally airing the filler;
(3) soaking the filler in a 5% glutaraldehyde solution at 37 ℃ for 24h, taking out, soaking in a 1g/L gelatin solution for 24h, taking out, fully washing, and naturally drying.
In this embodiment, the flow baffle 21 is made of stainless steel; the size of the reticular modified polyurethane foam plastic is 2CM multiplied by 2 CM; the diameter of the modified combined suspension filler ball 22 is 100 mm.
In this embodiment, the material of the different-wave baffle 24 is PVC, and the different-wave baffle is formed by connecting plates with the same area at an included angle α 44 of 45 degrees, and the surfaces of the plates are roughened.
Anaerobic sludge of a domestic sewage treatment plant is inoculated in the anaerobic treatment system, and sludge in an aerobic tank of the domestic sewage treatment plant is inoculated in the aerobic treatment system; a combined suspended filler ball 6 is arranged in a rotating filler box 3 and a filler baffle plate 5 of an anaerobic treatment system, a modified combined suspended filler ball 22 is arranged in an aerobic treatment system, and domestic sewage treatment equipment is started; in the implementation, the anaerobic treatment system and the aerobic treatment system are started simultaneously, the starting time of the anaerobic treatment system is 25 days, the aerobic treatment system is aerated for 5 days, the modified suspension filler balls 22 are smoothly filmed, and the starting is successful.
Domestic sewage enters the anaerobic treatment system through a water inlet 2 of the anaerobic treatment system, the domestic sewage sequentially passes through a first compartment 15, a second compartment 16, a third compartment 17 and a fourth compartment 18, a rotary stuffing box 3 is slowly rotated in the process, the sewage passes through a hydrolysis stage, an acid-producing fermentation stage, an ammonia-producing acetic acid-producing stage and a methane-producing stage, macromolecular organic matters in the sewage are gradually degraded into small molecular substances, and generated gas is collected through a gas collecting port 4;
after the domestic sewage is treated by the anaerobic treatment system, the effluent enters the aerobic treatment system, and organic matters in the sewage are further degraded; the sewage enters a sedimentation system after being treated by an aerobic treatment system, the sludge enters a sludge hopper 29, part of the sludge flows back to the aerobic treatment system to supplement microorganisms for the aerobic treatment system, and the rest sludge enters a sludge collection system; the effluent of the precipitation system enters a disinfection system, and is reused as reclaimed water after being disinfected and decolorized by ozone; in the implementation, the reaction time ratio of the domestic sewage in the anaerobic treatment system, the aerobic treatment system, the sedimentation system and the disinfection system is 6:10:3: 1; the rotating speed of the rotating stuffing box 3 is 1-3.5 r/min.
The invention is used by a certain sewage treatment plant in Oldensts city of Mongolia in 2019 in 3 months for sewage treatment, the system runs well until now, the treatment plant can take the intake water sample from the water inlet 2 of the anaerobic system for assay every day, and the sampling frequency is 2 hours/time; a water sample is also taken out from the water outlet 40 of the disinfection system for assay, and the sampling frequency is 2 hours/time; the results of 10 batches of assays were now randomly drawn as described in tables 1 and 2:
TABLE 1 basic project of treating domestic sewage water quality of effluent water results (unit: mg/L) using the present invention
| Time of sampling | Sample (I) | BOD 5 | COD | SS | NH3-N | TN | TP | PH | Faecal coliform group (body) |
| 2019.5.18 | Inflow water | 99 | 241 | 122 | 40.1 | 53.4 | 5.25 | 7.49 | 2.4*10 4 |
| 2019.5.18 | Discharging water | 5.2 | 11 | 3 | 0.138 | 10.9 | 0.3 | 7.0 | 3.2*10 2 |
| 2019.7.6 | Inflow water | 103 | 330 | 152 | 51.3 | 64.5 | 6.18 | 7.8 | 3.3*10 4 |
| 2019.7.6 | Discharging water | 3.1 | 13.2 | 3.07 | 0.513 | 12.9 | 0.31 | 7.1 | 2.5*10 2 |
| 2019.8.13 | Inflow water | 113 | 398 | 167 | 59.4 | 66.2 | 6.43 | 7.9 | 5.2*10 4 |
| 2019.8.13 | Discharging water | 4.6 | 15.9 | 4.3 | 0.21 | 13.12 | 0.37 | 6.8 | 2.3*10 2 |
| 2019.9.7 | Inflow water | 98 | 253 | 129 | 38.8 | 55.6 | 5.47 | 7.5 | 2.6*10 4 |
| 2019.9.7 | Discharging water | 4.3 | 10.1 | 2.58 | 0.155 | 10.6 | 0.27 | 7.1 | 1.5*10 2 |
| 2019.12.3 | Inflow water | 115 | 411 | 174 | 61.3 | 67.9 | 6.89 | 8.1 | 5.9*10 4 |
| 2019.12.3 | Discharging water | 2.1 | 16.4 | 3.5 | 0.245 | 12.9 | 0.41 | 7.3 | 3.4*10 2 |
| 2020.3.1 | Inflow water | 89 | 188 | 106 | 37.6 | 50.6 | 5.12 | 7.3 | 2.1*10 4 |
| 2020.3.1 | Discharging water | 3.4 | 7.5 | 2.1 | 0.15 | 9.6 | 0.31 | 7.0 | 1.1*10 2 |
| 2020.5.8 | Inflow water | 102 | 341 | 155 | 50.7 | 63.4 | 6.15 | 7.7 | 3.4*10 4 |
| 2020.5.8 | Discharging water | 3.7 | 13.7 | 3.1 | 0.202 | 12.05 | 0.37 | 7.1 | 1.3*10 2 |
| 2020.6.16 | Inflow water | 119 | 427 | 188 | 62.3 | 68.2 | 6.68 | 7.6 | 5.8*10 4 |
| 2020.6.16 | Discharging water | 2.9 | 17 | 3.76 | 0.25 | 12.3 | 0.4 | 6.8 | 2.5*10 2 |
| 2020.8.19 | Inflow water | 88 | 179 | 107 | 36.9 | 49.4 | 4.98 | 7.6 | 2.2*10 4 |
| 2020.8.19 | Discharging water | 4.2 | 7.2 | 2.2 | 0.15 | 9.4 | 0.29 | 7.1 | 1.9*10 2 |
| 2020.9.2 | Inflow water | 97 | 251 | 123 | 38.1 | 54.6 | 5.38 | 7.6 | 2.4*10 4 |
| 2020.9.2 | Discharging water | 2.6 | 10.1 | 2.46 | 0.15 | 10.3 | 0.32 | 7.2 | 3.4*10 2 |
| Standard A | - | ≤10 | ≤50 | ≤10 | ≤5 | ≤15 | ≤0.5 | ≤6-9 | ≤1000 |
TABLE 2 Water quality results (unit: mg/L) of effluent from treatment of contaminants such as domestic wastewater by the present invention
| Time of sampling | Sample (I) | Total arsenic | Total mercury | Total lead | Total cadmium | Total chromium | Hexavalent chromium | Alkyl mercury |
| 2019.5.18 | Inflow water | 0.0176 | 0.00063 | 0.02 | 0.003 | 0.01 | 0.004 | Not detected out |
| 2019.5.18 | Discharging water | 0.0016 | 0.00040 | Not detected out | Not detected out | Not detected out | Not detected out | Not detected out |
| 2019.7.6 | Inflow water | 0.0154 | 0.00058 | 0.014 | 0.0026 | 0.008 | 0.003 | Not detected out |
| 2019.7.6 | Discharging water | 0.0013 | 0.00037 | Not detected out | Undetected | Not detected out | Not detected out | Not detected out |
| 2019.8.13 | Inflow water | 0.0169 | 0.00064 | 0.03 | Not detected out | 0.008 | 0.003 | Not detected out |
| 2019.8.13 | Discharging water | 0.0015 | 0.0004 | Not detected out | Not detected out | Not detected out | Not detected out | Not detected out |
| 2019.9.7 | Inflow water | 0.0188 | 0.00074 | 0.03 | 0.0034 | 0.015 | 0.005 | Not detected out |
| 2019.9.7 | Discharging water | 0.0016 | 0.00046 | Not detected out | Not detected out | Not detected out | Not detected out | Not detected out |
| 2019.12.3 | Inflow water | 0.0178 | 0.00068 | 0.04 | 0.004 | 0.01 | 0.005 | Not detected out |
| 2019.12.3 | Discharging water | 0.0016 | 0.00043 | Not detected out | Not detected out | Not detected out | Not detected out | Not detected out |
| 2020.3.1 | Inflow water | 0.0155 | 0.00057 | 0.015 | 0.0028 | 0.009 | 0.003 | Undetected |
| 2020.3.1 | Discharging water | 0.0014 | 0.00035 | Not detected out | Not detected out | Not detected out | Not detected out | Not detected out |
| 2020.5.8 | Inflow water | 0.0158 | 0.00061 | 0.016 | 0.003 | 0.01 | 0.004 | Not detected out |
| 2020.5.8 | Discharging water | 0.0013 | 0.00038 | Not detected out | Undetected | Undetected | Not detected out | Not detected out |
| 2020.6.16 | Inflow water | 0.0195 | 0.00076 | 0.03 | 0.004 | 0.01 | 0.005 | Not detected out |
| 2020.6.16 | Discharging water | 0.0017 | 0.00047 | Not detected out | Not detected out | Not detected out | Not detected out | Not detected out |
| 2020.8.19 | Inflow water | 0.0156 | 0.00062 | 0.013 | 0.0027 | 0.008 | 0.003 | Not detected out |
| 2020.8.19 | Discharging water | 0.0014 | 0.00039 | Not detected out | Not detected out | Not detected out | Not detected out | Not detected out |
| 2020.9.2 | Inflow water | 0.0173 | 0.00063 | 0.02 | 0.0029 | 0.01 | 0.004 | Not detected out |
| 2020.9.2 | Discharging water | 0.0016 | 0.00040 | Not detected out | Not detected out | Not detected out | Not detected out | Not detected out |
| Standard A | - | ≤0.1 | ≤0.001 | ≤0.1 | ≤0.01 | ≤0.1 | ≤0.05 | Cannot be detected |
In table 1, the specific letter meanings are as follows:
COD: chemical oxygen demand. English bai full name: chemical Oxygen Demand.
COD is the amount dao of reducing substances which zhi needs to be oxidized in a water sample measured by a du chemical method. The oxygen equivalent of a substance (typically an organic substance) that can be oxidized by a strong oxidizing agent in wastewater, wastewater treatment plant effluent, and contaminated water. It is an important and relatively fast measurable organic pollution parameter in the study of river pollution and properties of industrial wastewater and the management of operation of wastewater treatment plants.
BOD: biochemical oxygen demand. English is called as a whole: biochemical Oxygen Demand.
BOD is biochemical oxygen demand or biochemical oxygen consumption (generally, five-day chemical oxygen demand), and is a comprehensive index indicating the content of aerobic pollutants such as organic substances in water. The total amount of dissolved oxygen in water consumed by the organic matters in water undergoing oxidative decomposition by the biochemical action of microorganisms to make the organic matters become inorganic or gasified is illustrated.
And SS: and (4) suspension. English is called as a whole: suspended Solids.
SS refers to solid matter suspended in water, including inorganic matter, organic matter, silt, clay, microorganism, etc., which are insoluble in water. The content of suspended matters in water is one of indexes for measuring the pollution degree of water.
TN: total nitrogen amount. English is called as a whole: total Nitrogen.
TN refers to the total amount of various forms of inorganic and organic nitrogen in water. Including inorganic nitrogen such as NO3-, NO 2-and NH4+ and organic nitrogen such as protein, amino acid and organic amine, calculated by the nitrogen-containing milligrams per liter of water. Is often used to indicate the degree of nutrient contamination of a body of water.
TP: total phosphorus amount. English is called as a whole: total Phophorus.
TP refers to the result of determination after water samples are digested and various forms of phosphorus are converted into orthophosphate, and is measured by the milligrams of phosphorus contained in each liter of water sample.
As shown in tables 1 and 2: through the treatment of the invention, the effluent quality index stably reaches the first grade A standard of pollutant discharge Standard of urban wastewater treatment plant (GB 18918-2002). The invention can be applied to daily sewage treatment, biochemical treatment is carried out in the whole process, no chemical is needed, secondary pollution is reduced, the operation cost is low, and better effect is achieved.
Claims (9)
1. The utility model provides a domestic sewage treatment system, includes anaerobic treatment system, good oxygen processing system, the system of deposiing, the disinfection system, sludge storage system and electricity distribution room (43), wherein anaerobic treatment system, good oxygen processing system, the system of deposiing, the disinfection system is communicate in proper order by the pipeline, and the system of deposiing and sludge storage system pass through the pipeline intercommunication, electricity distribution room (43) are anaerobic treatment system, good oxygen processing system, the system of deposiing, the system of disinfecting, the power supply of sludge storage system, its characterized in that:
the anaerobic treatment system comprises an anaerobic chamber (1), an anaerobic treatment system water inlet (2), a rotary stuffing box (3), a gas collecting port (4), a rotating shaft (7), a rotating motor (8), a stuffing baffle plate (5), a submersible stirrer (9), a sludge return port (10), a sludge return pipe (11) and an anaerobic treatment system water outlet (12);
the anaerobic chamber is divided into a first compartment (15), a second compartment (16), a third compartment (17) and a fourth compartment (18) by three pairs of packing baffles; each pair of packing baffles (5) comprises an upward flow packing baffle (51) and a downward flow packing baffle (52); the bottom of the upward flow packing baffle plate (51) is connected with the bottom of the anaerobic chamber, and the top of the upward flow packing baffle plate is suspended; the top of the downward flow packing baffle plate (52) is connected with the anaerobic chamber, and the bottom of the downward flow packing baffle plate is suspended; the downflow packing baffle (52) divides the first compartment (15), the second compartment (16), the third compartment (17) and the fourth compartment (18) into an upflow cell chamber (13) and a downflow cell chamber (14), respectively;
the packing baffle plate (5) comprises a rectangular frame body (53), a combined suspension packing ball (6) and a right frame plate (54); a plurality of groups of cross beams (55) which are arranged in parallel are arranged on the left side of the rectangular frame body (53), and a right frame plate (54) is arranged on the right side;
the rotary stuffing box (3) is positioned in the upward flow grid chamber (13), is of a cylindrical structure with hollow interior and latticed exterior, and is connected with the rotary motor (8) through the rotary shaft (7); the rotating motor (8) is arranged at the top of the air collecting port (4) and is used for driving the rotating stuffing box (3) to rotate slowly; the bottom of the first compartment (15), the second compartment (16) and the third compartment (17) is provided with a submersible stirrer (9); the bottom of the first compartment (15), the bottom of the second compartment (16), the bottom of the third compartment (17) and the bottom of the fourth compartment (18) are provided with sludge return ports (10), the bottom of the fourth compartment (18) is provided with a sludge return pump (181), and the sludge return pump (181) returns sludge in the fourth compartment (18) to the first compartment (15), the second compartment (16) and the third compartment (17) through a sludge return pipe (11); the water outlet (12) of the anaerobic treatment system is positioned on the upper part of the right side wall of the anaerobic chamber (1);
the aerobic treatment system comprises an aerobic chamber (19), an aerobic treatment system water inlet (20), a flow baffle plate (21), a modified combined suspended filler ball (22), a microporous aerator (23), a different-wave baffle plate (24) and an aerobic treatment system water outlet (25); the water inlet (20) of the aerobic treatment system is positioned above the left side wall of the aerobic chamber (19); the flow baffle plate (21) is arranged on the side wall of the aerobic chamber (19) below the water inlet (20) of the aerobic treatment system, the bottom of the flow baffle plate (21) is arc-shaped, and the outer brim of the flow baffle plate (21) extends outwards and inclines downwards;
the modified combined suspension filler ball (22) is internally made of modified reticulated polyurethane foam plastic, and the outside of the modified combined suspension filler ball is wrapped by modified porous rotary spherical suspension filler;
the microporous aerators (23) are uniformly arranged at the bottom of the aerobic chamber (19); the aerobic chamber (19) is divided into two areas by the different wave baffle plate (24), and the two areas are connected by a communication port (26) below the different wave baffle plate (24); the water outlet (25) of the aerobic treatment system is positioned above the right side wall of the aerobic chamber (19);
the sedimentation system consists of a sedimentation zone (27), a clear water zone (28) and a sludge hopper (29); the upper part of the left side wall of the settling zone (27) is provided with a settling system water inlet (30), the middle part is provided with an inclined plate cleaner (31), and the lower part is connected with a sludge hopper (29); the settling zone (27) is connected with the clear water zone (28) through a connecting port (32); the lower part of the clear water area (28) is connected with a sludge hopper (29); the sludge bucket (29) at the lower part of the settling zone (27) and the sludge bucket (29) at the lower part of the clear water zone (28) are both provided with sludge discharge ports (33), and the two sludge discharge ports (33) are connected through pipelines, converged and then connected with a sludge discharge pump (34); an outlet pipeline of the sludge discharge pump (34) is divided into two paths, one path is connected with the top of the aerobic chamber (19), and the other path is connected with a sludge storage system (42);
the disinfection system consists of an ozone generator (36) and a disinfection system main body (37); a disinfection system water inlet (38) is arranged above the left side wall of the disinfection system main body (37), a miniature aerator (39) is arranged at the bottom of the disinfection system main body and is connected with an ozone generator (36) through a pipeline, and a disinfection system water outlet (40) is arranged below the right side wall of the disinfection system; a disinfection system air collecting port (41) is arranged above the disinfection system main body, and collected gas is circulated to the gas inlet pipeline through a pipeline;
the horizontal width ratio of the first compartment (15), the second compartment (16), the third compartment (17) and the fourth compartment (18) is 3: 1: 1: 2; the volume ratio of the upward flow cell chambers (13) to the downward flow cell chambers (14) ranges from 5:1 to 3: 1.
2. The domestic sewage treatment system of claim 1, wherein: the combined suspension filler ball (6) comprises an inner reticular polyurethane foam plastic and an outer porous rotary spherical suspension filler; the reticulated polyurethane foam has a size of 2CM x 2 CM; the diameter of the combined suspension filler ball is 100 mm.
3. The domestic sewage treatment system of claim 1, wherein: the horizontal width of the rectangular frame body (53) is smaller than the diameter of one combined suspension filler ball (6), and the material is PVC plastic; the right frame plate (54) is a PVC solid plate with a rough surface; the distance between the cross beams (55) is smaller than the diameter of a combined suspension packing ball (6); the diameter of the grid of the rotary stuffing box (3) is smaller than that of the combined suspension stuffing ball (6), and the combined suspension stuffing ball (6) is filled; the distance between the rotary stuffing box (3) and the side walls of the stuffing baffle plates (5) on the two sides and the anaerobic chamber (1) is 2-3 CM.
4. The domestic sewage treatment system of claim 1, wherein: the manufacturing method of the modified combined suspension filler ball (22) specifically comprises the following steps:
(1) polyurethane foam plastic and a porous rotary spherical suspension filler are soaked in a potassium permanganate solution at 60 ℃ for 4 hours under the condition of continuous aeration, and then taken out, and washed by a 6mol/L hydrochloric acid solution until a brown layer on the surface is washed away;
(2) fully washing the filler by using 0.01mol/L PBS buffer solution until the filler is neutral, and naturally airing the filler;
(3) soaking the filler in a 5% glutaraldehyde solution at 37 ℃ for 24h, taking out, soaking in a 1g/L gelatin solution for 24h, taking out, fully washing, and naturally drying.
5. The domestic sewage treatment system of claim 1, wherein: the flow baffle plate (21) is made of stainless steel; the size of the reticular modified polyurethane foam plastic is 2CM multiplied by 2 CM; the diameter of the modified combined suspension filler ball (22) is 100 mm.
6. The domestic sewage treatment system of claim 1, wherein: the material of the different-wave baffle plate (24) is PVC, the different-wave baffle plate is formed by connecting plates with the same area at an included angle alpha (44) of 30-60 degrees, and the surfaces of the plates are roughened.
7. A method for treating domestic sewage using the domestic sewage treatment system of any one of claims 1 to 6, comprising the steps of:
step 1: anaerobic sludge of a domestic sewage treatment plant is inoculated in the anaerobic treatment system, and sludge in an aerobic tank of the domestic sewage treatment plant is inoculated in the aerobic treatment system; a rotary stuffing box (3) and a stuffing baffle plate (5) of an anaerobic treatment system are filled with combined suspended stuffing balls (6), an aerobic treatment system is filled with modified combined suspended stuffing balls (22), and domestic sewage treatment equipment is started;
step 2: domestic sewage enters an anaerobic treatment system through a water inlet (2) of the anaerobic treatment system, the domestic sewage sequentially passes through a first compartment (15), a second compartment (16), a third compartment (17) and a fourth compartment (18), a rotary stuffing box (3) is slowly rotated in the period, the sewage passes through a hydrolysis stage, an acid production and fermentation stage, an ammonia and acetic acid production stage and a methane production stage, macromolecular organic matters in the sewage are gradually degraded into small molecular substances, and generated gas is collected through a gas collecting port (4);
and step 3: after the domestic sewage is treated by the anaerobic treatment system, the effluent enters the aerobic treatment system, and organic matters in the sewage are further degraded; the sewage enters a sedimentation system after being treated by an aerobic treatment system, the sludge enters a sludge hopper (29), part of the sludge flows back to the aerobic treatment system to supplement microorganisms for the aerobic treatment system, and the rest sludge enters a sludge collection system; and the effluent of the precipitation system enters a disinfection system, and is reused as reclaimed water after being disinfected and decolorized by ozone.
8. The method for treating domestic sewage according to claim 7, wherein: the reaction time ratio of the sewage in the anaerobic treatment system, the aerobic treatment system, the sedimentation system and the disinfection system is 6:10:3: 1.
9. The method for treating domestic sewage according to claim 7, wherein: the rotating speed of the rotating stuffing box (3) is 1-3.5 r/min.
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