CN111453856A - Wastewater treatment agent for efficiently decoloring and degrading COD (chemical oxygen demand) and wastewater treatment process - Google Patents
Wastewater treatment agent for efficiently decoloring and degrading COD (chemical oxygen demand) and wastewater treatment process Download PDFInfo
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- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Abstract
The invention discloses a wastewater treatment agent for efficiently decoloring and degrading COD (chemical oxygen demand) and a wastewater treatment process, relates to the technical field of wastewater treatment, aims to solve the problem of difficult degradation of COD in wastewater, and adopts the technical scheme that: comprises 20-30% of water treatment agent, 50-60% of microbial capsule particles, 20-30% of honeycomb ceramic particles and 1-5% of flocculating agent. And adding the wastewater treatment agent into high-concentration COD industrial wastewater, wherein the mass ratio of the high-concentration COD industrial wastewater to the wastewater treatment agent is 1: 0.010-1: 0.025, fully stirring, controlling the temperature of the high-concentration COD industrial wastewater to be 20-35 ℃, and standing for 1-5 h. The invention can degrade COD in the wastewater and realize the decolorizing effect.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a wastewater treatment agent capable of efficiently decoloring and degrading COD (chemical oxygen demand) and a wastewater treatment process.
Background
Along with the acceleration of the urbanization process in China, the urban sewage treatment rate is improved year by year, the treatment pressure of an urban sewage treatment plant is also increased sharply, if the treated wastewater enters the environment and directly causes secondary pollution to the water body and the environment, the sewage treatment can not fully play the role of eliminating pollution and protecting the environment, and meanwhile, the treatment method also forms a serious threat to the ecological environment and human activities.
In industrial sewage, particularly in the production process of fine chemical industry, high-concentration ammonia nitrogen wastewater is often generated, the concentration of ammonia nitrogen and COD in the wastewater is high, the ammonia nitrogen is an important factor causing water eutrophication, the COD can cause deterioration of natural water quality and destroy water balance, almost all organisms except microorganisms are killed, the discharge amount of the ammonia nitrogen and the COD is large, the components are complex, the toxicity is strong, the harm to the water environment is great, and the treatment difficulty is large.
There are many methods for reducing COD, for example: the invention patent with publication number CN105800759B discloses a wastewater treatment agent for efficiently removing ammonia nitrogen and COD, which is prepared from the following components in parts by weight: 30-50 parts of nekal, 4-6 parts of polyepoxysuccinic acid, 5-7 parts of sodium dodecyl benzene sulfonate, 0.3-0.5 part of benzotriazole, 5-7 parts of isothiazolinone, 10-15 parts of ferrous sulfate, 1-3 parts of barium sulfate, 6-10 parts of sodium silicate, 5-8 parts of active carbon, 5-8 parts of diatomite, 20-25 parts of bamboo vinegar liquid, 1-1.5 parts of citric acid, 2-3 parts of potassium ferrate and 50-70 parts of deionized water, and can flocculate substances and remove ammonia nitrogen and COD in wastewater; the invention patent with publication number CN104030421B discloses a composite COD remover and a method for removing COD in wastewater by using the same, wherein the remover is generated by polymerization reaction of ferrous sulfate, sodium chlorate, aluminum nitrate, aluminum sulfate, aluminum trichloride, sodium sulfite, sodium nitrite, sodium metabisulfite, polyacrylamide and deionized water in proportion, the composite wastewater COD remover is added into high-concentration COD industrial wastewater in proportion, a proper amount of alkali is added to adjust the pH value of the industrial wastewater to 7-8, the industrial wastewater is stirred for 3 minutes at normal temperature and is kept stand for 10-15 minutes; can shorten the time of removing COD by the waste water and remove the COD in the waste water at one time.
The scheme solves the problems that COD in the water body can be removed and the decoloring operation is carried out simultaneously, and the invention provides a new technical scheme to solve the problems.
Therefore, a new solution is needed to solve this problem.
Disclosure of Invention
The present invention is directed to solving the above problems and providing a wastewater treatment agent and a wastewater treatment process for efficiently decoloring and degrading COD, which can degrade COD in wastewater and realize the decoloring effect.
The technical purpose of the invention is realized by the following technical scheme:
a high-efficiency wastewater treatment agent for decoloring and degrading COD comprises 20-30% of the wastewater treatment agent, 50-60% of microbial capsule particles, 20-30% of honeycomb ceramic particles and 1-5% of a flocculating agent.
Preferably, the honeycomb ceramic particles comprise 40-50% of tourmaline, 4-30% of pore-forming agent, 20-30% of boric acid, 13-21% of clay and 5% of binder.
Preferably, the clay is one or more of kaolin, montmorillonite, illite or zeolite; the pore-forming agent comprises 10-20% of plant ash, 30-40% of cellulose, 30-60% of starch, 5-10% of sodium bicarbonate and 5-10% of hydrated lime; the binder is a mixture of one or more of starch, maltose syrup, tung oil, cellulose and polyvinyl alcohol and water.
Preferably, the production process of the honeycomb ceramic particles comprises the following steps:
the method comprises the following steps: 1) taking various raw materials according to a proportion;
the method comprises the following steps: 2) respectively crushing tourmaline, pore-forming agent and boric acid, mixing, kneading, and adding clay and binder for kneading;
the method comprises the following steps: 3) sealing the mixed raw material prepared in the step 2), standing for 12-24 hours, mixing the paste after standing, and extruding the mixed raw material;
the method comprises the following steps: 4) drying the extruded mixed raw materials in the sun to solidify the mixed raw materials;
the method comprises the following steps: 5) roasting the dried mixed raw materials, controlling the roasting temperature to be 550-700 ℃, and the roasting time to be 3-5 h.
Preferably, the production process of the microbial capsule particles comprises the following steps:
preparing raw materials: grinding the dried zeolite into raw material particles with the particle size of 1-3 mm;
and (3) heat treatment: heating the obtained raw material particles in a hot air blowing treatment mode, and preheating the mixed raw material at the temperature of 100-200 ℃ for 0.5-1 hour; then stabilizing the mixed raw materials at the temperature of 100-120 ℃ for 1-2 hours; then calcining the mixed raw materials at the temperature of 200 ℃ and 400 ℃ for 3-7 hours;
cooling treatment: isolating oxygen, blowing the mixed raw materials by nitrogen at 0-10 ℃, and cooling the mixed raw materials to below 20 ℃;
biological treatment: soaking the cooled mixed raw material in a COD degrading bacteria solution, maintaining the temperature at 25-30 ℃, isolating oxygen and standing for 5-10 hours;
and (3) drying treatment: taking out the mixed raw materials after biological treatment, adding a coating agent into the mixed raw materials, uniformly stirring to ensure that the coating agent forms a coating layer outside the mixed raw materials, and drying at the temperature of 20-30 ℃ to form the microbial capsule particles.
Preferably, the preparation process of the COD degrading bacteria solution comprises the following steps: inoculating COD degrading bacteria into a culture solution, carrying out constant temperature shaking culture at 25-30 ℃, controlling the initial pH value to be 5.5-6.5, and culturing for 12-24 hours.
Preferably, the coating agent comprises: 30-50% of gelatin, 10-20% of yeast extract, 5-15% of sodium alginate, 5-8% of calcium hydroxide, 5-8% of sodium sulfide, 3-5% of magnesium sulfate and the balance of water.
Preferably, the COD degrading bacteria comprise 5% -15% of bacillus subtilis; 5% -15% of bacillus amyloliquefaciens; 5% -15% of anthrax bacillus; 5% -15% of staphylococcus pasteurii; 5% -15% of aerococcus viridis; 5% -15% of lactobacillus casei; 5% -15% of lysine bacillus fusiformis; 5% -15% of lactococcus lactis; 5% -15% of bacillus subtilis; 5% -15% of bacillus licheniformis; 5 to 15 percent of pseudomonas stutzeri.
Preferably, the water treatment agent comprises: 20 to 40 percent of sodium chlorate, 5 to 30 percent of aluminum nitrate, 1 to 5 percent of ferrous sulfate, 1 to 15 percent of aluminum trichloride, 1 to 15 percent of sodium sulfite, 1 to 10 percent of sodium nitrite and 1 to 2.5 percent of sodium pyrosulfite; the flocculant comprises 20-40% of aluminum sulfate, 20-40% of aluminum chloride, 20-25% of aluminum sulfate and 10-20% of polyacrylamide.
The invention also provides a wastewater treatment process, which comprises the following steps: adding the wastewater treatment agent into high-concentration COD industrial wastewater, wherein the mass ratio of the high-concentration COD industrial wastewater to the wastewater treatment agent is 1: 0.010-1: 0.025, fully stirring, controlling the temperature of the high-concentration COD industrial wastewater to be 20-35 ℃, standing for 1-5h, and heating by adopting an infrared heating mode in the process of maintaining the temperature.
In conclusion, the invention has the following beneficial effects:
adding microbial capsule particles and honeycomb ceramic particles into the wastewater treatment agent, wherein the microbial capsule particles take zeolite as a main body, and a large number of channels and through holes are formed in the zeolite particles; through high-temperature modification treatment, organic or inorganic impurities on the surfaces of zeolite particles and in microchannels can be removed, microchannels in the zeolite are opened, and the absorption and exchange capacity of the zeolite is improved, so that the absorption rate is increased, the adsorption effect of the zeolite on the particles is improved, substances in wastewater are adsorbed, and the decoloration effect of the wastewater is achieved; and the cations in the zeolite are readjusted through high temperature, so that the structure of channels in the zeolite is improved, and the adsorption effect of zeolite particles on organic compounds and metal ions is improved.
Add the microbial community in the middle of the microbial capsule granule through COD degradation fungus solution, when the microbial capsule granule soaks in the middle of the COD degradation fungus solution, the microorganism can permeate in the middle of the microbial capsule granule, and cooperate the passageway on the zeolite, can make the microorganism breed on the zeolite surface, and the zeolite inside can also adsorb certain culture solution, and remain wherein, after the microbial capsule granule breaks away from solution, the microorganism can also continue to breed, and can continue breeding of bacterium at the later stage always, prolong the activity time of microorganism.
Adding the coating agent in the middle of the mixed raw material of zeolite, stirring for the coating agent is in mixed raw materials appearance cladding layer, adopt substances such as gelatin, sodium alginate to match each other and form the slowly-releasing layer, the microorganism can ooze from the cladding layer, outside zeolite also can permeate wherein, and can slowly release waste water treatment efficiency, can prolong the time that the microorganism released, thereby improve the sewage treatment's of zeolite availability factor, can release gradually along with constantly soaking of sewage, thereby can increase sewage treatment's continuation.
Tourmaline in the honeycomb ceramic particles has unique properties of piezoelectricity, pyroelectric property, far infrared radiation, anion release and the like, can be used as a catalyst, and accelerates the oxidative degradation speed of COD in water, thereby improving the treatment efficiency; and by adding the pore-forming agent in the honeycomb ceramic particles, the pore-forming agent can form pore channels on the surfaces of the honeycomb ceramic particles in the processing process of the honeycomb ceramic particles, so that the contact surface area of the wastewater and the honeycomb ceramic particles can be increased, and the biological treatment efficiency can be improved.
After all components in the waste water treating agent are mixed with each other, all substance components are in contact with each other, the honeycomb ceramic particles can be in contact with the microbial capsule particles, microbes in the microbial capsule particles can be derived to the honeycomb ceramic particles, and substances such as starch, maltose syrup, cellulose and the like in the honeycomb ceramic particles can improve nutrition and supply the microbes to reproduce, so that the propagation of the microbes can be increased after the microbes are placed for a certain time, and the treating effect of the microbes is increased.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows: the embodiment discloses a wastewater treatment agent for efficiently decoloring and degrading COD, which comprises 20% of the wastewater treatment agent, 55% of microbial capsule particles, 20% of honeycomb ceramic particles and 5% of a flocculating agent.
Wherein the water treatment agent comprises: 40% of sodium chlorate, 28% of aluminum nitrate, 5% of ferrous sulfate, 10% of aluminum trichloride, 5% of sodium sulfite, 10% of sodium nitrite and 2% of sodium pyrosulfite; the flocculating agent comprises 30% of aluminum sulfate, 25% of aluminum chloride, 25% of aluminum sulfate and 20% of polyacrylamide.
The honeycomb ceramic particles comprise 50 percent of tourmaline, 10 percent of pore-forming agent, 20 percent of boric acid, 15 percent of clay and 5 percent of binder, wherein the clay is a mixture of kaolin and montmorillonite; the pore-forming agent comprises 20% of plant ash, 30% of cellulose, 40% of starch, 5% of sodium bicarbonate and 5% of hydrated lime; the binder is a mixture of starch, maltose syrup and water.
Processing honeycomb ceramic particles by:
the method comprises the following steps: 1) taking various raw materials according to a proportion;
the method comprises the following steps: 2) respectively crushing tourmaline, pore-forming agent and boric acid, mixing, kneading, and adding clay and binder for kneading;
the method comprises the following steps: 3) sealing the mixed raw material prepared in the step 2), standing for 24 hours, mixing the paste after standing, and extruding the mixed raw material;
the method comprises the following steps: 4) drying the extruded mixed raw materials in the sun to solidify the mixed raw materials;
the method comprises the following steps: 5) and roasting the aired mixed raw materials, wherein the roasting temperature is controlled to be 550 ℃, and the roasting time is 3 hours.
The production process of the microbial capsule particle comprises the following steps:
preparing raw materials: grinding the dried zeolite into raw material particles with the particle size of 1 mm;
and (3) heat treatment: heating the obtained raw material particles in a hot air blowing treatment mode, and preheating the mixed raw material at the temperature of 100-200 ℃ for 1 hour; then stabilizing the mixed raw materials at 100 ℃ for 1 hour; then calcining the mixed raw materials at 300 ℃ for 5 hours;
cooling treatment: isolating oxygen, blowing the mixed raw materials by nitrogen at 5 ℃, and cooling the mixed raw materials to be below 20 ℃;
biological treatment: inoculating COD degrading bacteria into the culture solution, wherein the COD degrading bacteria specifically comprise bacillus subtilis 15%; 15% of bacillus amyloliquefaciens; 15% of anthrax bacillus; 15% of staphylococcus pasteuri; 10% of aerococcus glaucopiae; 5% of lactobacillus casei; lysine bacillus fusiformis 5%; 5% of lactococcus lactis; 5% of bacillus subtilis; 5% of bacillus licheniformis; 5% of pseudomonas stutzeri; performing constant temperature shaking culture at 25 deg.C, controlling initial pH value to 5.5-6.5, and culturing for 12 hr; soaking the cooled mixed raw material in a COD degrading bacteria solution, maintaining the temperature at 30 ℃, and then isolating oxygen and standing for 6 hours;
and (3) drying treatment: taking out the mixed raw materials after biological treatment, adding a coating agent into the mixed raw materials, wherein the coating agent is prepared by mixing 50% of gelatin, 10% of yeast extract, 5% of sodium alginate, 5% of calcium hydroxide, 5% of sodium sulfide, 5% of magnesium sulfate and 20% of water, uniformly stirring, uniformly coating the coating agent on the mixed raw materials to ensure that the coating agent forms a coating layer outside the mixed raw materials, and drying at 25 ℃ to form the microbial capsule particles.
And finally, uniformly mixing and stirring 20% of the water treatment agent, 55% of the microbial capsule particles, 20% of the honeycomb ceramic particles and 5% of the flocculating agent in proportion to form the wastewater treatment agent.
The embodiment also discloses a wastewater treatment process, which comprises the following steps: the prepared wastewater treatment agent is added into high-concentration COD industrial wastewater, and the mass ratio of the high-concentration COD industrial wastewater to the wastewater treatment agent is 1: 0.020, fully stirring, controlling the temperature of the high-concentration COD industrial wastewater to be 30 ℃, standing for 5 hours, and treating the wastewater by a wastewater treating agent;
COD in the wastewater can be absorbed by the microbial capsule particles and the honeycomb ceramic particles to achieve the decolorization effect of the wastewater, and substances in the wastewater are oxidized and degraded; and the cations in the zeolite are readjusted through high temperature, so that the structure of channels in the zeolite is improved, and the adsorption effect of zeolite particles on organic compounds and metal ions is improved.
Microorganism in the middle of the microbial capsule granule can carry out oxidative degradation to COD in the middle of the waste water, and can degrade the release by environmental protection gradually, thereby can prolong the microbiological treatment time, and biological capsule granule and honeycomb ceramic granule after the processing is accomplished can stop in the middle of the waste water treatment pond, accumulate, and can discharge the sewage of accomplishing the processing, let in new waste water wherein again, add waste water treatment agent again and carry out degradation treatment, thereby can increase microbial content in the middle of the waste water pond, thereby can increase the microbial oxidation degradation efficiency of waste water, reach the effect of high-efficient degradation COD and decoloration.
Example two:
a high-efficiency wastewater treatment agent for decoloring and degrading COD comprises 23% of a water treatment agent, 52% of microbial capsule particles, 22% of honeycomb ceramic particles and 3% of a flocculating agent.
Wherein the water treatment agent comprises: the water treatment agent comprises: 38% of sodium chlorate, 22% of aluminum nitrate, 2.5% of ferrous sulfate, 15% of aluminum trichloride, 15% of sodium sulfite, 5% of sodium nitrite and 2.5% of sodium pyrosulfite; the flocculant comprises 38% of aluminum sulfate, 22% of aluminum chloride, 22% of aluminum sulfate and 18% of polyacrylamide.
Wherein the honeycomb ceramic particles comprise 40 percent of tourmaline, 15 percent of pore-forming agent, 22 percent of boric acid, 18 percent of clay and 5 percent of binder. The clay is mixture of kaolin, montmorillonite, illite and zeolite; the pore-forming agent comprises 14% of plant ash, 35% of cellulose, 35% of starch, 8% of sodium bicarbonate and 8% of hydrated lime; the binder is a mixture of starch, maltose syrup, tung oil, cellulose, polyvinyl alcohol and water, wherein the content of starch is 50%.
The honeycomb ceramic particles are prepared and processed by adopting the material of the honeycomb ceramic particles, and the specific production process comprises the following steps:
the method comprises the following steps: 1) taking various raw materials according to a proportion;
the method comprises the following steps: 2) respectively crushing tourmaline, pore-forming agent and boric acid, mixing, kneading, and adding clay and binder for kneading;
the method comprises the following steps: 3) sealing the mixed raw material prepared in the step 2), standing for 24 hours, mixing the paste after standing, and extruding the mixed raw material;
the method comprises the following steps: 4) drying the extruded mixed raw materials in the sun to solidify the mixed raw materials;
the method comprises the following steps: 5) and roasting the aired mixed raw materials, wherein the roasting temperature is controlled to be 700 ℃, and the roasting time is 3 hours.
Then preparing the microbial capsule particles, wherein the specific production process comprises the following steps:
the method comprises the following steps: 1) preparing raw materials: grinding the dried zeolite into raw material particles with the particle size of 1-3 mm;
the method comprises the following steps: 2) and (3) heat treatment: heating the obtained raw material particles in a hot air blowing treatment mode, preheating the mixed raw material at 200 ℃ for 0.5 hour; then stabilizing the mixed raw materials at 120 ℃ for 1 hour; then calcining the mixed raw materials at 400 ℃ for 3 hours;
the method comprises the following steps: 3) cooling treatment: isolating oxygen, blowing the mixed raw materials by nitrogen at 0 ℃, and cooling the mixed raw materials to below 20 ℃;
the method comprises the following steps: 4) biological treatment: soaking the cooled mixed raw material in a COD degrading bacteria solution, maintaining the temperature at 25 ℃, and then isolating oxygen and standing for 10 hours;
the method comprises the following steps: 5) and (3) drying treatment: taking out the mixed raw materials after biological treatment, adding a coating agent into the mixed raw materials, uniformly stirring to ensure that the coating agent forms a coating layer outside the mixed raw materials, and drying at the temperature of 30 ℃ to form the microbial capsule particles.
Preparing COD degrading bacteria solution and coating agent in advance, wherein the specific preparation process of the COD degrading bacteria solution comprises the following steps: inoculating COD degrading bacteria into the culture solution, carrying out constant temperature shaking culture at 25 ℃, controlling the initial pH value to be 5.5-6.5, and culturing for 24 hours; wherein the COD degrading bacteria comprise Bacillus subtilis 12%; 15% of bacillus amyloliquefaciens; 15% of anthrax bacillus; 10% of staphylococcus pasteuri; 14% of aerococcus glaucopiae; 8% of lactobacillus casei; lysine bacillus fusiformis 8%; 12% of lactococcus lactis; 6% of bacillus subtilis; 6% of bacillus licheniformis; pseudomonas stutzeri 6%;
the coating agent comprises: 40% of gelatin, 20% of yeast extract, 12% of sodium alginate, 8% of calcium hydroxide, 6% of sodium sulfide, 4% of magnesium sulfate and 10% of water, mixing and stirring the raw materials except water, adding 10% of water, and then fully mixing and stirring.
The embodiment also discloses a wastewater treatment process, and the specific water treatment process comprises the following steps: the wastewater treatment agent in the embodiment is added into high-concentration COD industrial wastewater, and the mass ratio of the high-concentration COD industrial wastewater to the wastewater treatment agent is 1: 0.025, fully stirring, controlling the temperature of the high-concentration COD industrial wastewater to be 20-35 ℃, and standing for 1 h; after the treatment is completed, sewage is discharged, the microbial capsule particles and the honeycomb ceramic particles are reserved at the bottom of the sewage tank, new wastewater is introduced into the sewage tank, and then the wastewater treatment agent is added for degradation treatment, so that the microbial content in the sewage tank can be increased, the microbial oxidative degradation efficiency of the wastewater can be further increased, and the effects of efficiently degrading COD and decoloring are achieved.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (10)
1. A high-efficiency wastewater treatment agent for decoloring and degrading COD is characterized in that: comprises 20-30% of water treatment agent, 50-60% of microbial capsule particles, 20-30% of honeycomb ceramic particles and 1-5% of flocculating agent.
2. The wastewater treatment agent for efficiently decoloring and degrading COD according to claim 1, which is characterized in that: the honeycomb ceramic particles comprise 40-50% of tourmaline, 4-30% of pore-forming agent, 20-30% of boric acid, 13-21% of clay and 5% of binder.
3. The wastewater treatment agent for efficiently decoloring and degrading COD according to claim 2, which is characterized in that: the clay is one or more of kaolin, montmorillonite, illite or zeolite; the pore-forming agent comprises 10-20% of plant ash, 30-40% of cellulose, 30-60% of starch, 5-10% of sodium bicarbonate and 5-10% of hydrated lime; the binder is a mixture of one or more of starch, maltose syrup, tung oil, cellulose and polyvinyl alcohol and water.
4. The wastewater treatment agent for efficiently decoloring and degrading COD according to claim 3, wherein: the production process of the honeycomb ceramic particles comprises the following steps:
the method comprises the following steps: 1) taking various raw materials according to a proportion;
the method comprises the following steps: 2) respectively crushing tourmaline, pore-forming agent and boric acid, mixing, kneading, and adding clay and binder for kneading;
the method comprises the following steps: 3) sealing the mixed raw material prepared in the step 2), standing for 12-24 hours, mixing the paste after standing, and extruding the mixed raw material;
the method comprises the following steps: 4) drying the extruded mixed raw materials in the sun to solidify the mixed raw materials;
the method comprises the following steps: 5) roasting the dried mixed raw materials, controlling the roasting temperature to be 550-700 ℃, and the roasting time to be 3-5 h.
5. The wastewater treatment agent for efficiently decoloring and degrading COD according to claim 1, which is characterized in that: the production process of the microbial capsule particle comprises the following steps:
preparing raw materials: grinding the dried zeolite into raw material particles with the particle size of 1-3 mm;
and (3) heat treatment: heating the obtained raw material particles in a hot air blowing treatment mode, and preheating the mixed raw material at the temperature of 100-200 ℃ for 0.5-1 hour; then stabilizing the mixed raw materials at the temperature of 100-120 ℃ for 1-2 hours; then calcining the mixed raw materials at the temperature of 200 ℃ and 400 ℃ for 3-7 hours;
cooling treatment: isolating oxygen, blowing the mixed raw materials by nitrogen at 0-10 ℃, and cooling the mixed raw materials to below 20 ℃;
biological treatment: soaking the cooled mixed raw material in a COD degrading bacteria solution, maintaining the temperature at 25-30 ℃, isolating oxygen and standing for 5-10 hours;
and (3) drying treatment: taking out the mixed raw materials after biological treatment, adding a coating agent into the mixed raw materials, uniformly stirring to ensure that the coating agent forms a coating layer outside the mixed raw materials, and drying at the temperature of 20-30 ℃ to form the microbial capsule particles.
6. The wastewater treatment agent for efficiently decoloring and degrading COD according to claim 5, wherein: the preparation process of the COD degrading bacteria solution comprises the following steps: inoculating COD degrading bacteria into a culture solution, carrying out constant temperature shaking culture at 25-30 ℃, controlling the initial pH value to be 5.5-6.5, and culturing for 12-24 hours.
7. The wastewater treatment agent for efficiently decoloring and degrading COD according to claim 6, which is characterized in that: the coating agent comprises: 30-50% of gelatin, 10-20% of yeast extract, 5-15% of sodium alginate, 5-8% of calcium hydroxide, 5-8% of sodium sulfide, 3-5% of magnesium sulfate and the balance of water.
8. The wastewater treatment agent for efficiently decoloring and degrading COD according to claim 7, which is characterized in that: the COD degrading bacteria comprise 5 to 15 percent of bacillus subtilis; 5% -15% of bacillus amyloliquefaciens; 5% -15% of anthrax bacillus; 5% -15% of staphylococcus pasteurii; 5% -15% of aerococcus viridis; 5% -15% of lactobacillus casei; 5% -15% of lysine bacillus fusiformis; 5% -15% of lactococcus lactis; 5% -15% of bacillus subtilis; 5% -15% of bacillus licheniformis; 5 to 15 percent of pseudomonas stutzeri.
9. The wastewater treatment agent for efficiently decoloring and degrading COD according to claim 1, which is characterized in that: the water treatment agent comprises: 20 to 40 percent of sodium chlorate, 5 to 30 percent of aluminum nitrate, 1 to 5 percent of ferrous sulfate, 1 to 15 percent of aluminum trichloride, 1 to 15 percent of sodium sulfite, 1 to 10 percent of sodium nitrite and 1 to 2.5 percent of sodium pyrosulfite; the flocculant comprises 20-40% of aluminum sulfate, 20-40% of aluminum chloride, 20-25% of aluminum sulfate and 10-20% of polyacrylamide.
10. A process for treating wastewater, the process comprising the steps of: adding the wastewater treatment agent according to any one of claims 1 to 9 to high-concentration COD industrial wastewater in a mass ratio of 1: 0.010-1: 0.025, fully stirring, controlling the temperature of the high-concentration COD industrial wastewater to be 20-35 ℃, and standing for 1-5 h.
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| CN114133029A (en) * | 2021-12-13 | 2022-03-04 | 北京桑德环境工程有限公司 | Bacterium-rich porous denitrification filler and preparation method thereof |
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| CN114471452B (en) * | 2022-03-04 | 2023-09-08 | 太原碧蓝水利工程设计股份有限公司 | Method for rapidly treating acidic mine pit water and adsorbent prepared from acidic mine pit water |
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