CN114275971A - Integrated sewage treatment process - Google Patents
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Abstract
The application relates to the technical field of sewage treatment, and particularly discloses an integrated sewage treatment process, which comprises the following operation steps: s1: conveying the sewage to a grating area for filtering to obtain a water body A; s2: conveying the water body A to a denitrification area, adding the filler and the bacterial liquid A, and staying for 0.5-2h to obtain a water body B; s3: conveying the water body B to a nitrification area, adding a bacterial liquid B, adding a filler, and staying for 4-6 hours to obtain a water body C; s4: conveying the water body C to a settling zone, adding a flocculating agent, collecting supernatant D and sludge, and recovering the sludge; s5: and sterilizing the supernatant D to obtain purified sewage. COD, ammonia nitrogen, total phosphorus and suspended solid content in the sewage after this application is handled are 27.9mg/L, 2.16mg/L, 7.8mg/L, 0.10mg/L and 5.5mg/L respectively, have improved sewage treatment's emission effect.
Description
Technical Field
The application relates to the field of sewage treatment, in particular to a sewage integrated sewage treatment process.
Background
With the development of socioeconomic, the discharge amount of garbage penetrating fluid and high-concentration sewage is increased year by year, and the problem of water resource shortage is aggravated year by year. The garbage penetrating fluid and the high-concentration sewage need to be discharged according to the discharge standard, if the garbage penetrating fluid and the high-concentration sewage are directly discharged without reaching the standard, the total amount of pollutants exceeds the self-purification capacity of the water body, the water body is anoxic and eutrophicated, and finally, a black and odorous water body is formed to destroy the ecological balance.
The unpurified sewage generally has the problems of total nitrogen, total phosphorus, ammonia nitrogen, suspended matters, high chemical oxygen demand and the like, and in order to enable the sewage to meet the water quality requirement of being discharged into a certain water body or being reused and simultaneously avoid the pollution of the sewage to the environment, the sewage is generally purified and then discharged.
In the related technology, the process flow of sewage treatment sequentially comprises four steps of sewage mixing, denitrification, organic matter degradation and sludge treatment, the problem that the sewage purified by the method still has chemical oxygen demand, ammonia nitrogen, total phosphorus, total nitrogen and suspended matters exceeding the standard still exists, and the purification effect of sewage treatment is poor.
Disclosure of Invention
In order to improve sewage treatment's purifying effect, this application provides an integration sewage treatment process.
In a first aspect, the present application provides an integrated wastewater treatment process, which adopts the following technical scheme:
an integrated sewage treatment process is sequentially provided with a grating area, a denitrification area, a nitrification area and a sedimentation area according to the water flow direction of sewage, and comprises the following operation steps:
s1: conveying the sewage to a grating area for filtering to obtain a water body A;
s2: conveying the water body A to a denitrification area, adding filler and bacterial liquid A, adding the bacterial liquid A according to the volume of sewage of 0.1-0.2%, and staying for 0.5-2h to obtain a water body B; the bacterial liquid A is obtained by mixing a composite active bacterial agent A and water in a mass ratio of 1: 50;
s3: conveying the water body B to a nitrification area, adding filler and bacterial liquid B, adding the bacterial liquid B according to 0.3-0.4% of the sewage volume, carrying out aeration treatment, and staying for 4-6h to obtain a water body C; the bacterial liquid B is obtained by mixing nitrobacteria B and water in a mass ratio of 1: 50;
s4: conveying the water body C to a settling zone, adding a flocculating agent according to 0.0005-0.0007% of the volume of the sewage, uniformly stirring, collecting supernatant D and sludge, and recovering the sludge;
s5: conveying the supernatant D to an ultraviolet disinfection channel, and sterilizing to obtain purified sewage;
the composite active microbial inoculum A comprises the following raw materials in parts by weight: 45-60 parts of pseudomonas bacteria, 20-30 parts of alcaligenes bacteria, 5-10 parts of yeast extract, 75-80 parts of methanol and 5-10 parts of potassium nitrate.
Further, the bacterial liquid A may be added in an amount of 0.1%, 0.1-0.2%, 0.2% by volume of the wastewater, more preferably 0.1%. The bacterial liquid B can be added in an amount of 0.3%, 0.3-0.4%, or 0.4% by volume of the wastewater, more preferably 0.3%.
Through adopting above-mentioned technical scheme, carry sewage to the grid district to block the bulky debris in the sewage, not only be favorable to follow-up purification quality of water, can avoid sewage treatment's pipeline to block up again. The grid area comprises a coarse grid and a fine grid, the coarse grid is mainly used for removing floating objects in water, and the fine grid is mainly used for removing some fine particles and suspended matters in the water, so that the effect of primary filtration on sewage is achieved.
The temperature in the denitrification zone is controlled to be 25-30 ℃, which is beneficial to the growth of the flora microorganisms in the bacterial liquid in the denitrification zone. The pH value is adjusted to 7.0-7.3, so that the activity of nitrite reductase in the sewage can be effectively prevented from being inhibited, and the accumulation of nitrous oxide is reduced. The denitrification zone needs to be carried out under anoxic conditions, thereby limiting the dissolved oxygen to 0-0.5 mg/L. Activated carbon of a certain proportion is added into the filler thrown into the denitrification area, so that the contact area of the filler and the sewage is greatly increased, and the adsorption capacity of the filler to the pollutants is greatly improved. And adding the bacterial liquid A to ensure that denitrifying bacteria in the bacterial liquid A reduce nitrate and nitrite in the sewage into nitrogen, thereby achieving the aim of denitrification and reducing the content of total nitrogen in the sewage.
The aeration pump arranged in the nitrification area can provide dissolved oxygen required by microbial metabolism, so that the activated sludge is always in a suspended state and is fully contacted and mixed with the sewage. Adding the bacterial liquid B, and converting the ammonia nitrogen into nitric acid or nitrite nitrogen by using nitrifying bacteria in the bacterial liquid B so as to reduce the ammonia nitrogen index in the sewage. And adding the composite flocculant into the precipitation zone to fully mix the sewage and the composite flocculant, and precipitating suspended matters in the water by utilizing the natural precipitation of the water or the precipitation effect of the composite flocculant.
The pseudomonas bacteria can reduce nitrate nitrogen in sewage into a bacterial group of gaseous nitrogen, and the pseudomonas bacteria use methanol as a carbon source to convert nitrate in bottom mud into nitrogen to be discharged into the atmosphere or convert toxic nitrite into ammonium ions to be dissolved in a water body so as to reduce the total nitrogen content. The alcaligenes bacteria reduce the nitrogen in nitrate or nitrite to free nitrogen through a series of intermediate products, thereby achieving the effect of removing nitrogen and reducing the total nitrogen content. In addition, both pseudomonas bacteria and alcaligenes bacteria have the function of removing phosphorus so as to reduce the content of total phosphorus in the sewage.
The yeast extract can provide nitrogen source and various growth factors for Pseudomonas bacteria and Alcaligenes bacteria, so as to ensure the activity of denitrifying bacteria. Methanol provides a carbon source for growth of pseudomonas and alcaligenes bacteria, and products of oxidative decomposition are carbon dioxide and water, so that any intermediate product which is difficult to decompose is not left, and the denitrification rate can be increased. Potassium nitrate provides the inorganic salts required for growth of pseudomonas and alcaligenes bacteria.
Preferably, the method comprises the following steps: the weight ratio of the alcaligenes bacteria to the pseudomonas bacteria is 1: (2-2.5).
By adopting the technical scheme, the content of total nitrogen and total phosphorus after sewage purification can be reduced more favorably by adjusting the weight ratio of the bacteria of the Alcaligenes and the bacteria of the Pseudomonas.
Preferably, the method comprises the following steps: the composite active microbial inoculum B comprises 40-50 parts of acidovorax bacteria, 35-62.5 parts of paracoccus bacteria and 30-40 parts of charcoal;
by adopting the technical scheme, the acidovorax bacteria are efficient salt-tolerant bacteria, can degrade various organic matters in the high-salinity sewage, and effectively degrade COD (chemical oxygen demand) content, ammonia nitrogen, total nitrogen and total phosphorus content in the sewage. The paracoccus bacteria have the characteristics of easy culture, high growth speed, good flocculation effect, strong environment adaptability and the like, and metabolites of the paracoccus bacteria have good flocculation effect on sewage and can remove the total nitrogen content in the sewage. By adding the biochar, the larger specific surface area and the strong adsorption capacity of the biochar are utilized to improve the adsorbed capacity of the sludge, and the activated sludge in the sedimentation tank can be attached to the surface of the biochar, so that the degradation removal rate of COD can be effectively improved.
Preferably, the method comprises the following steps: the particle size of the biochar is 1250-1300 meshes.
By adopting the technical scheme, the particle size of the biochar is controlled to 1250-1300 meshes, so that the specific surface area and the strong adsorption capacity of the biochar can be further increased, the dispersity of the biochar in sewage is improved, and COD in the sewage can be removed more favorably.
Preferably, the method comprises the following steps: the weight ratio of the paracoccus to the acidovorax bacteria is 1: (0.8-1.2).
By adopting the technical scheme, the weight ratio of the paracoccus and the acidovorax bacteria is adjusted, so that the COD content, ammonia nitrogen, total nitrogen and total phosphorus content in the sewage after sewage treatment can be reduced.
Preferably, the method comprises the following steps: in the S2 and S3, the filler is added according to 20-30% of the volume of the sewage.
Further, the filler may be 20%, 20-22%, 22-25%, 25-28%, 28-30%, and preferably 25% by volume of the wastewater.
By adopting the technical scheme, the proportion between the filler and the sewage is adjusted so as to improve the removal rate of COD content, ammonia nitrogen, total phosphorus and suspended matters in the sewage.
Preferably, the method comprises the following steps: the composite flocculant comprises the following raw materials in parts by weight: 30-40 parts of polyaluminium chloride, 5-10 parts of aluminum sulfate, 5-10 parts of micro-sand and 10-15 parts of alum.
By adopting the technical scheme, the polyaluminium chloride is an inorganic polymeric flocculant, has high electric neutralization and bridging effects on colloids and particles in water, can strongly remove micro-toxic substances and heavy metal ions, and has stable properties. After the aluminum sulfate is dissolved in water, fine particles and natural colloidal particles in the water can be coagulated into large floccules, so that the floccules are easier to precipitate, and the removal efficiency of organic matters which are difficult to biodegrade is improved. By adding the micro-sand, pollutants are polymerized with the micro-sand into large-particle flocs easy to precipitate under the action of the polyaluminium chloride, and meanwhile, the growth and precipitation speed of the flocs are accelerated by utilizing the gravity settling and adsorption action of the micro-sand. Alum can be added as coagulant aid, dissolved in water to form colloid to adsorb impurity and settle, so as to settle the suspended matter in the settling zone and reduce the content of suspended matter in sewage.
Preferably, the method comprises the following steps: the weight ratio of the micro sand to the polyaluminium chloride is 1: (4-7).
By adopting the technical scheme, the weight part ratio of the micro-sand to the polyaluminium chloride is adjusted so as to improve the removal rate of suspended pollutants in the sewage.
In summary, the present application includes at least one of the following beneficial technical effects:
(1) according to the method, by adjusting the weight ratio of the bacteria of the genus Alcaligenes to the bacteria of the genus Pseudomonas in the composite active microbial inoculum A in the step S2, the COD, ammonia nitrogen, total phosphorus and suspended matter content of the treated purified water are respectively 45.3mg/L, 5.28mg/L, 12.5mg/L, 0.38mg/L and 9.0mg/L, the content of the total nitrogen and the total phosphorus is lower, and the discharge effect of sewage treatment is improved.
(2) According to the method, by adjusting the weight ratio of the paracoccus and the acidovorax bacteria in the compound active microbial inoculum B in the step S3, the COD, ammonia nitrogen, total phosphorus and suspended matter content of the treated purified water are respectively 31.5mg/L, 4.82mg/L, 10.4mg/L, 0.29mg/L and 8.2mg/L, the total nitrogen, total phosphorus, COD and ammonia nitrogen content are lower, and the discharge effect of sewage treatment is improved.
(3) According to the method, by adjusting the weight part ratio of the micro-sand to the polyaluminium chloride in the flocculating agent in the step S4, the COD, ammonia nitrogen, total phosphorus and suspended matter content of the treated purified water are respectively 29.2mg/L, 3.07mg/L, 9.2mg/L, 0.18mg/L and 6.5mg/L, the method has lower total nitrogen, total phosphorus, COD and ammonia nitrogen content, and the discharge effect of sewage treatment is improved.
Detailed Description
The present application will be described in further detail with reference to specific examples.
The following raw materials are all commercially available products, all of which enable the disclosure of the raw materials to be sufficient, and should not be understood as limiting the source of the raw materials, specifically, the yeast extract is selected from the group consisting of the bioagineering company limited of west andreli, with a product number of REL-000000937; the biochar is selected from special energy machinery and electric company Limited in the market of tin-free, and the grain size is 1250 meshes.
This application sets gradually into grid district, denitrification district, nitration district and settling zone according to the rivers direction of sewage.
Example 1
The integrated sewage treatment process of embodiment 1, comprising the following operating steps:
s1: sequentially conveying the sewage to a coarse grating area and a fine grating area at a flow velocity of 1m/s for filtering to obtain a water body A;
s2-1: mixing the compound active microbial inoculum A and water according to the mixing amount of each raw material of the compound active microbial inoculum A in the table 1 in a mass ratio of 1:50 to obtain a bacterial liquid A;
s2-2: controlling the temperature in the denitrification zone at 30 ℃, adjusting the pH value to 7.2 and the dissolved oxygen to 0.5mg/L, conveying the water body A to the denitrification zone, adding porous EPP filler and bacterial liquid A, and staying for 2 hours to obtain a water body B, wherein the porous EPP filler and the bacterial liquid A respectively account for 25 percent and 0.1 percent of the sewage volume;
s3-1: mixing the bacteria of the genus nitrobacter with water in a mass ratio of 1:50 to obtain a bacterial liquid B;
s3-2: controlling the temperature in the nitrification region to be 35 ℃, adjusting the pH value to be 7, and adjusting the dissolved oxygen to be 1mg/L, conveying the water body B to the nitrification region, adding filler and bacterial liquid B, wherein the porous EPP filler and the bacterial liquid B respectively account for 25 percent and 0.3 percent of the sewage volume, starting aeration reaction through an aeration pump, and adding the filler at the aeration gas speed of 10m/h, and staying for 6 hours to obtain the water body C;
s4: conveying the water body C to a settling zone, adding a polyacrylamide flocculant according to 0.0006% of the volume of the sewage, uniformly stirring, discharging supernatant and sludge, collecting the supernatant D and the sludge, and recovering the sludge;
s5: and (5) conveying the supernatant D to an ultraviolet disinfection channel, and sterilizing to obtain purified sewage.
Examples 2 to 3
Examples 2 to 3 are the same as the integrated sewage treatment process of example 1, except that in step S2, the amounts of the raw materials of the composite active microbial inoculum a are different, as shown in table 1.
TABLE 1 examples 1-3 blending amounts (unit: g) of respective raw materials of the composite active microbial agent A
| Raw materials | Example 1 | Example 2 | Example 3 |
| Pseudomonas bacteria | 50 | 50 | 50 |
| Alcaligenes bacteria | 30 | 30 | 30 |
| Yeast extract | 5 | 7 | 10 |
| Methanol | 75 | 77 | 80 |
| Potassium nitrate | 5 | 8 | 10 |
Examples 4 to 6
Examples 4 to 6 are the same as the integrated sewage treatment process of example 2, except that in step S2, the amounts of the raw materials of the composite active microbial inoculum a are different, as shown in table 2.
TABLE 2 examples 4-6 blending amounts (unit: g) of each raw material of the composite active microbial agent A
| Raw materials | Example 4 | Example 5 | Example 6 |
| Pseudomonas bacteria | 45 | 60 | 50 |
| Alcaligenes bacteria | 22.5 | 26 | 20 |
| Yeast extract | 7 | 7 | 7 |
| Methanol | 77 | 77 | 77 |
| Potassium nitrate | 8 | 8 | 8 |
Example 7
Example 7 is identical to the integrated wastewater treatment process of example 1, except that in step S3, the bacteria belonging to the genus nitrobacter are replaced with nitrifying bacteria group B of the following raw materials in parts by weight: the specific mixing amounts of Acidovorax bacteria, Paracoccus bacteria and charcoal are shown in Table 3.
Examples 8 to 9
Examples 8 to 9 are identical to example 7 in the integrated wastewater treatment process, except that in step S3, the amounts of the raw materials of the nitrifying bacteria group B are different, as shown in table 3.
TABLE 3 blending amounts (unit: g) of respective raw materials of examples 7 to 9 of composite active microbial agent B
| Raw materials | Example 7 | Example 8 | Example 9 |
| Acidovorax bacteria | 45 | 45 | 45 |
| Bacteria of the genus Paracoccus | 27 | 27 | 27 |
| Biochar | 30 | 35 | 40 |
Examples 10 to 12
Examples 10 to 12 are the same as the integrated sewage treatment process of example 8, except that in step S3, the amounts of the raw materials of the composite active microbial inoculum B are different, as shown in table 4.
TABLE 4 examples 10 to 12 blending amounts (unit: g) of respective raw materials of the composite active microbial agent B
Example 13
Example 13 is identical to example 11 in the integrated wastewater treatment process, except that in step S2, the raw material of the composite active microbial inoculum a of example 5 is selected, and the types and the amounts of the other raw materials are identical to example 11.
Examples 14 to 16
Examples 14 to 16 are identical to the integrated wastewater treatment process of example 5, except that in step S4, the flocculant comprises the following raw materials in parts by weight: the specific mixing amounts of the polyaluminium chloride, the aluminium sulfate, the micro-sand and the alum are shown in the table 5.
TABLE 5 examples 14-16 flocculant each raw material mixing amount (unit: g)
| Raw materials | Example 14 | Example 15 | Example 16 |
| Polyaluminium chloride | 30 | 30 | 30 |
| Aluminium sulphate | 5 | 7 | 10 |
| Micro sand | 8 | 8 | 8 |
| Alum | 10 | 13 | 15 |
Examples 17 to 19
Examples 17 to 19 are identical to the integrated sewage treatment process of example 15 except that the raw materials of the flocculant are mixed in different amounts in step S4, as shown in table 6.
TABLE 6 examples 17-19 flocculant each raw material mixing amount (unit: g)
| Raw materials | Example 17 | Example 18 | Example 19 |
| Polyaluminium chloride | 40 | 37 | 35 |
| Aluminium sulphate | 7 | 7 | 7 |
| Micro sand | 10 | 7 | 5 |
| Alum | 13 | 13 | 13 |
Example 20
The integrated sewage treatment process of example 20 is completely the same as that of example 18, except that in step S3, the raw material of the composite active microbial inoculum B of example 11 is selected, and the types and the amounts of the other raw materials are the same.
Example 21
The integrated sewage treatment processes of the embodiment 21 and the embodiment 20 are completely the same, except that in the step S2, the raw material of the composite active microbial inoculum a in the embodiment 5 is selected, and the types and the mixing amounts of the other raw materials are the same.
Blank control group
The wastewater from the blank control was not purified and was derived from the same sources as the wastewater from examples 1-21.
Comparative example 1
The integrated sewage treatment process of comparative example 1 comprises the following operating steps:
s1: the same as example 1;
s2-1: the same as example 1;
s2-2: controlling the temperature in the denitrification zone at 30 ℃, adjusting the pH value to 7.2 and adjusting the dissolved oxygen content to 0.5mg/L, conveying the water body A to the denitrification zone, adding the bacterial liquid A which is the same as that in the embodiment 1, and staying the porous EPP filler and the bacterial liquid A for 2 hours according to 25 percent and 0.1 percent of the sewage volume respectively to obtain a water body B;
s3-1: the same as example 1;
s3-2: the same as example 1;
s4: the same as example 1;
s5: the same as in example 1.
Comparative example 2
The integrated sewage treatment process of comparative example 2 comprises the following operating steps:
s1: the same as example 1;
s2-1: the same as example 1;
s2-2: the same as example 1;
s3: the same as example 1;
s3-1: controlling the temperature in the nitrification zone at 35 ℃, adjusting the pH value to 7, and adjusting the dissolved oxygen to 1mg/L, conveying the water body B to the nitrification zone, adding bacterial liquid B which is the same as that in the embodiment 1, wherein the bacterial liquid B is 0.3 percent of the sewage volume, and is provided with an aeration pump, starting aeration reaction through the aeration pump, and feeding filler at the aeration air speed of 10m/h, and staying for 6h to obtain a water body C;
s4: the same as example 1;
s5: the same as in example 1.
Comparative example 3
Comparative example 3 is identical to the integrated sewage treatment process of example 1, except that in step S2, pseudomonas bacteria are replaced with alcaligenes bacteria in the composite active microbial inoculum a in equal amount, which is specifically shown in table 1.
Comparative example 4
Comparative example 4 is identical to the integrated sewage treatment process of example 1 except that in step S2, the same amount of alcaligenes bacteria is replaced by pseudomonas bacteria in the composite active microbial inoculum a, as shown in table 1.
Comparative example 5
The integrated sewage treatment process of comparative example 5 comprises the following operating steps:
s1: the same as example 1;
s2-1: mixing denitrifying phosphorus accumulating bacteria with water in a mass ratio of 1:50 to obtain a bacterial liquid A;
s2-2: the same as example 1;
s3-1: the same as example 1;
s3-2: the same as example 1;
s4: the same as example 1;
s5: the same as in example 1.
Performance detection purification detection: the following test standards or methods were used to test COD, ammonia nitrogen, total phosphorus and suspended matter in examples 1-19, blank control and comparative examples 1-4, respectively, and the test results are detailed in Table 7.
COD: the COD content was measured by the method of GBT11914-1989 "determination of chemical oxygen demand".
Ammonia nitrogen: the detection of the content of the ammonia nitrogen is carried out by adopting a method of HJ535-2009 Nanshi reagent spectrophotometry for measuring the ammonia nitrogen in water.
Suspended matters: the content of suspended substances is detected by adopting a method of GBT11901-1989 'gravimetric method for measuring suspended substances in water'.
Total nitrogen: the method of GB 11894 and 1989, namely alkaline potassium persulfate digestion ultraviolet spectrophotometry for measuring total nitrogen in water is adopted to detect the content of the total nitrogen.
Total phosphorus: the total phosphorus content is detected by a method of GB 11893-1989 ammonium molybdate spectrophotometry for measuring total phosphorus in water.
TABLE 7 Performance test results of the treated wastewater of different processes
The detection results in Table 7 show that the indexes of COD, ammonia nitrogen, total phosphorus, suspended matter content and the like in the sewage treated by the integrated sewage treatment process all meet the A standard of GB188918-2002 discharge Standard of pollutants for urban Sewage treatment plant, the discharge standards of the contents of COD, ammonia nitrogen, total phosphorus and suspended matter in the sewage are respectively less than or equal to 50mg/L, less than or equal to 8mg/L, less than or equal to 15mg/L, less than or equal to 0.5mg/L and less than or equal to 10mg/L, the minimum content of COD, ammonia nitrogen, total phosphorus and suspended matters in the sewage treatment system can reach 27.9mg/L, 2.16mg/L, 7.8mg/L, 0.10mg/L and 5.5mg/L respectively, the sewage treatment system completely meets the sewage discharge standard, compared with a blank control group, the method obviously reduces the contents of COD, ammonia nitrogen, total phosphorus and suspended matters in the sewage, and improves the discharge effect of sewage treatment.
In examples 1 to 3, the contents of COD, ammonia nitrogen, total phosphorus and suspended solids in the wastewater treated by the integrated wastewater treatment process of example 2 were 43.1mg/L, 5.30mg/L, 13.2mg/L, 0.43mg/L and 9.1mg/L, respectively, which were lower than those in examples 1 and 3, indicating that the integrated wastewater treatment process step S2 is suitable for the composite active microbial inoculum a containing yeast extract, methanol and potassium nitrate in parts by weight, and improves the discharge effect of wastewater treatment.
In examples 4 to 6, the contents of COD, ammonia nitrogen, total phosphorus and suspended matters in the wastewater treated by the integrated wastewater treatment process of example 5 were 45.3mg/L, 5.28mg/L, 12.5mg/L, 0.38mg/L and 9.0mg/L, respectively, which were lower than those in examples 4 and 6, indicating that the ratio of the alcaligenes bacteria to the pseudomonas bacteria in the composite active microbial agent a in step S2 of the integrated wastewater treatment process of example 5 was appropriate when the weight ratio was 1:2.3, and the discharge effect of wastewater treatment was improved.
In examples 7 to 9, the contents of COD, ammonia nitrogen, total phosphorus and suspended solids in the wastewater treated by the integrated wastewater treatment process of example 9 were 37.5mg/L, 5.23mg/L, 12.3mg/L, 0.35mg/L and 8.7mg/L, respectively, which were lower than those in examples 7 and 9, indicating that the integrated wastewater treatment process of example 9, step S4, in which the nitrifying bacteria colony B, is a suitable weight fraction of biochar, and the discharge effect of wastewater treatment was improved.
In examples 10 to 12, the contents of COD, ammonia nitrogen, total phosphorus and suspended solids in the wastewater treated by the integrated wastewater treatment process of example 11 were 31.5mg/L, 4.82mg/L, 10.4mg/L, 0.29mg/L and 8.2mg/L, respectively, which were lower than those in examples 10 and 12, indicating that the integrated wastewater treatment process step S4 is suitable when the weight ratio of paracoccus to acidovorax bacteria in nitrifying bacteria group B is 1:1, and improves the discharge effect of wastewater treatment.
With reference to examples 13 and 10 to 12, the contents of COD, ammonia nitrogen, total phosphorus and suspended matters in the sewage treated by the integrated sewage treatment process of example 13 are respectively 29.5mg/L, 3.25mg/L, 9.5mg/L, 0.23mg/L and 7.5mg/L, which are lower than those in examples 10 to 12, indicating that the discharge effect of sewage treatment is improved when the composite active microbial inoculum a and the nitrifying bacteria group B are simultaneously added in the integrated sewage treatment process.
In examples 14 to 16, the contents of COD, ammonia nitrogen, total phosphorus and suspended solids in the wastewater treated by the integrated wastewater treatment process of example 15 were respectively 29.3mg/L, 3.14mg/L, 9.2mg/L, 0.2mg/L and 6.6mg/L, which were lower than those in examples 14 and 16, indicating that the aluminum sulfate and alum in the flocculant of step S4 of the integrated wastewater treatment process of example 15 are suitable in parts by weight, and the discharge effect of wastewater treatment is improved.
In examples 17 to 19, the contents of COD, ammonia nitrogen, total phosphorus and suspended solids in the wastewater treated by the integrated wastewater treatment process of example 18 were respectively 29.2mg/L, 3.07mg/L, 9.2mg/L, 0.18mg/L and 6.5mg/L, which were lower than those in examples 17 and 19, indicating that the flocculant of step S4 of the integrated wastewater treatment process is suitable when the weight ratio of the micro-sand to the polyaluminium chloride is 1:5.2, and the discharge effect of wastewater treatment is improved.
In examples 20 to 21, the contents of COD, ammonia nitrogen, total phosphorus and suspended matters in the sewage treated by the integrated sewage treatment process in example 21 were respectively 27.9mg/L, 2.16mg/L, 7.8mg/L, 0.10mg/L and 5.5mg/L, which are lower than those in example 20, indicating that when the composite active microbial agent a, the nitrifying bacteria group B and the flocculant were simultaneously added to the flocculant in the integrated sewage treatment process, the discharge effect of sewage treatment was improved. Compared with the comparative examples 1 to 4, the sewage treated by the integrated sewage treatment process of the comparative examples 1 to 4 has lower contents of COD, ammonia nitrogen, total phosphorus and suspended matters than the sewage treated by the integrated sewage treatment process of the example 1, which shows that the composite active microbial inoculum A added into the bacterial liquid A in the denitrification area of the step S3, the filler added into the denitrification area and the nitrification area in the steps S3 and S5, and the pseudomonas bacteria and the alcaligenes bacteria added into the composite active microbial inoculum A can improve the discharge effect of sewage treatment differently.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (8)
1. An integrated sewage treatment process is characterized in that a grating area, a denitrification area, a nitrification area and a sedimentation area are sequentially arranged according to the water flow direction of sewage, and the integrated sewage treatment process comprises the following operation steps:
s1: conveying the sewage to a grating area for filtering to obtain a water body A;
s2: conveying the water body A to a denitrification area, adding filler and bacterial liquid A, adding the bacterial liquid A according to the volume of sewage of 0.1-0.2%, and staying for 0.5-2h to obtain a water body B; the bacterial liquid A is obtained by mixing a composite active bacterial agent A and water according to the mass ratio of 1: 50;
s3: conveying the water body B to a nitrification area, adding filler and bacterial liquid B, adding the bacterial liquid B according to 0.3-0.4% of the sewage volume, carrying out aeration treatment, and staying for 4-6h to obtain a water body C; the bacterial liquid B is obtained by mixing nitrobacteria B and water according to the mass ratio of 1: 50;
s4: conveying the water body C to a settling zone, adding a flocculating agent according to 0.0005-0.0007% of the volume of the sewage, uniformly stirring, collecting supernatant D and sludge, and recovering the sludge;
s5: sterilizing the supernatant D to obtain purified water;
the composite active microbial inoculum A comprises the following raw materials in parts by weight: 45-60 parts of pseudomonas bacteria, 20-30 parts of alcaligenes bacteria, 5-10 parts of yeast extract, 75-80 parts of methanol and 5-10 parts of potassium nitrate.
2. The integrated wastewater treatment process according to claim 1, wherein: the weight ratio of the alcaligenes bacteria to the pseudomonas bacteria is 1: (2-2.5).
3. The integrated sewage treatment process according to claim 1, wherein the nitrifying bacteria group B comprises the following raw materials in parts by weight: 40-50 parts of acidovorax bacteria, 35-62.5 parts of paracoccus bacteria and 30-40 parts of charcoal.
4. The integrated wastewater treatment process according to claim 3, wherein: the particle size of the biochar is 1250-1300 meshes.
5. The integrated wastewater treatment process according to claim 3, wherein: the weight ratio of the paracoccus to the acidovorax bacteria is 1: (0.8-1.2).
6. The integrated wastewater treatment process according to claim 1, wherein: in the steps S2 and S3, the filler is added according to 20-30% of the volume of the sewage.
7. The integrated sewage treatment process according to claim 1, wherein the flocculant comprises the following raw materials in parts by weight: 30-40 parts of polyaluminium chloride, 5-10 parts of aluminum sulfate, 5-10 parts of micro-sand and 10-15 parts of alum.
8. The integrated wastewater treatment process according to claim 7, wherein: the weight ratio of the micro sand to the polyaluminium chloride is 1: (4-7).
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209143973U (en) * | 2018-11-14 | 2019-07-23 | 曹钻 | Integral domestic sewage treatment device |
| WO2020220922A1 (en) * | 2019-04-30 | 2020-11-05 | 北京工业大学 | Method and apparatus for treating urban sewage by coupling anaerobic ammonia oxidation with endogenous short-range denitrification of anoxic zone of aoa process |
| CN113620531A (en) * | 2021-08-19 | 2021-11-09 | 北京北控生态建设集团有限公司 | Remediation and treatment method for black and odorous water body |
-
2021
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209143973U (en) * | 2018-11-14 | 2019-07-23 | 曹钻 | Integral domestic sewage treatment device |
| WO2020220922A1 (en) * | 2019-04-30 | 2020-11-05 | 北京工业大学 | Method and apparatus for treating urban sewage by coupling anaerobic ammonia oxidation with endogenous short-range denitrification of anoxic zone of aoa process |
| CN113620531A (en) * | 2021-08-19 | 2021-11-09 | 北京北控生态建设集团有限公司 | Remediation and treatment method for black and odorous water body |
Non-Patent Citations (3)
| Title |
|---|
| 朱杰: "《肉类加工废水生物脱氮工艺过程研究》", 30 June 2007 * |
| 沈萍等: "《微生物学》", 31 August 2009 * |
| 王玉堂: "《有益微生物制剂及其在水产养殖中的应用》", 30 September 2018 * |
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