CN113200602A - Preparation method of microorganism reinforced immobilized filler for treating urban black and odorous water body - Google Patents
Preparation method of microorganism reinforced immobilized filler for treating urban black and odorous water body Download PDFInfo
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Abstract
The invention relates to the field of wastewater treatment, and discloses a preparation method of a microorganism reinforced immobilized filler for treating urban black and odorous water, which comprises the following steps: preparing porous filler, calcification treatment of hydroxyl phosphate, hydrophilic treatment and the like; the filler prepared by the method increases the biological adhesion performance of the material, and finally, the microbial reinforced immobilized filler suitable for treating the urban black and odorous water body is obtained after hydrophilic modification; the filler has good hydrophilicity and biological affinity, can greatly improve the biological treatment effect of the filler, can allow the discharge of a small amount of domestic sewage while ensuring the cleanness of urban water, can keep the urban water clean for a long time while treating urban black and odorous water, and has long-term purification capacity.
Description
Technical Field
The invention relates to the field of wastewater treatment, in particular to a preparation method of a microorganism reinforced immobilized filler for treating urban black and odorous water.
Background
Along with the rapid development of social economy and the acceleration of urbanization process in China, the urban scale and population are continuously increased, the discharge amount of human production and domestic sewage is increasingly increased, the concentration of pollutants entering a water body exceeds the self-purification capacity of the water body, the urban water body is poor in mobility and insufficient in hydrodynamic force, so that the water environment is deteriorated, the pollutants are accumulated, and the black and odorous condition of the water body is aggravated. The black and odorous water body not only destroys urban landscapes and ecosystems, but also influences the physical health of residents, and brings huge economic loss.
CN111533247A discloses a method for treating black and odorous water body, comprising: (1) dividing the black and odorous water body into a first section and a second section, and transferring the water stored in the first section to the second section; (2) adding a bottom sludge conditioner to the first section, so that reducing substances and partial organic matters in the bottom sludge of the first section are decomposed; (3) and arranging a microorganism strengthening fixation device in the first section, and then transferring the sewage in the second section to the first section while supplying oxygen to the water body in the first section. By adopting the method, the black and odorous water body can be treated in situ, the problems that the bottom sludge is not completely restored or the bottom sludge lacks an outward transportation treatment condition, the water body nearby does not have a condition for placing water treatment equipment, the water quality is difficult to maintain for a long time and the like in the black and odorous water body treatment process are solved, the occupied land is not needed to arrange a bypass treatment device, and meanwhile, the method can be suitable for the black and odorous water body treatment without a pollutant interception condition.
CN111484111A discloses a black and odorous water body treatment device, which comprises a water-proof bag, wherein the middle part of the water-proof bag is communicated with a sewage inlet pipe and a flocculating agent conveying pipe; the sewage inlet pipe is communicated with a water pump, and the flocculating agent conveying pipe is communicated with a dosing pump; the periphery of the top of the waterproof bag is fixed with a floating body, the middle part of the interior is provided with a mixing device, the bottom of the waterproof bag is communicated with a sludge discharge pipe, a sludge discharge pump is arranged on the sludge discharge pipe, a sludge quantity sensing device is arranged on the waterproof bag, and the sludge quantity sensing device is in wired or wireless connection with the sludge discharge pump. The invention has small occupied area and realizes the quick separation of clear water and flocculation precipitation after the flocculation of the black and odorous water body; and the flocculation precipitation is not required to be cleaned after the water is discharged, and the cost of transferring and converting the flocculation precipitation is low.
CN108623000A discloses a black and odorous water body treatment device, comprising: a container body; the pressing plates are movably sleeved on the horizontal rotating shaft and can synchronously rotate along with the horizontal rotating shaft; wherein, a sponge component which can be expanded or contracted is fixedly arranged between two adjacent pressing plates. Through adopting foretell structure, can be so that the denitrifying bacterium of good oxygen bacterium and anaerobism can breed in a large number on the sponge subassembly, thereby get rid of the abundant nutrition in the black and odorous water body effectively, and the mud of mixing in the black and odorous water body is when flowing through the sponge subassembly, mud then can be intercepted by the sponge subassembly and depend on the sponge subassembly, when two adjacent clamp plates extrusion sponge subassemblies, the mud that depends on the sponge subassembly then can release and fall the bottom that holds the chamber, reach the purpose of getting rid of the mud of mixing in the black and odorous water body.
The biomembrane technology is an important technology in the urban black and odorous water body restoration. The biofilm technology mainly utilizes a biofilm formed by growth of microorganisms on a biological filler to purify water, at present, a plurality of ecological materials are applied to carriers such as broken stones, fibers, plastics and the like, the microorganisms grow on the carriers from inside to outside and comprise anaerobic layers, facultative anaerobic layers and aerobic layers, and water pollutants are degraded in different areas of the biofilm. The biological filler has various types, the material, structure, performance and the like of different fillers directly influence the water treatment effect, and the common biological filler cannot meet the treatment of urban black and odorous water bodies with complex conditions.
Disclosure of Invention
In order to solve the problems, the invention provides a preparation method of a microorganism reinforced solid-supported filler for treating urban black and odorous water.
A preparation method of a microorganism reinforced solid-supported filler for treating urban black and odorous water comprises the following steps:
s1, preparing porous filler, namely, dehydrating 180 parts of activated sludge in 100-180 parts by mass, drying, adding 20-35 parts of clay, 10-18 parts of bentonite, 30-60 parts of calcium carbonate, 1-5 parts of sodium humate and 2.3-6.2 parts of pore-forming agent into a mixer, mixing and stirring uniformly, adding 20-35 parts of binder, stirring uniformly, granulating, drying, forming and roasting to obtain the porous filler;
s2, hydroxyl phosphate calcification treatment, namely adding 60-80 parts of porous filler into 300-400 parts of dihydrogen phosphate solution with the mass part of 5-10%, heating to 95-115 ℃, reacting for 6-20h, and washing with clear water after the reaction is finished to finish hydroxyl phosphate calcification of the porous filler;
s3, hydrophilic treatment, namely adding 60-80 parts of hydroxyl phosphate calcified porous filler into 200-300 parts of hydrophilic modifier with the mass part of 1-5%, soaking for 1-5h, and drying at 40-60 ℃ after finishing the soaking treatment to finish the hydrophilic treatment; the microorganism reinforced solid-carrying filler for treating the urban black and odorous water body can be obtained after the treatment.
The pore-forming agent is carbon black or active carbon or sawdust.
The binder is a polyvinylpyrrolidone aqueous solution with the mass portion of 5% -10%.
The dihydric phosphate is ammonium dihydrogen phosphate or sodium dihydrogen phosphate or potassium dihydrogen phosphate.
The hydrophilic modifier is prepared by the following method:
controlling the temperature of 3-90 ℃ and stirring for 60-120min to obtain allyl starch solution, wherein 3-7 parts by mass of allyl glycidyl ether, 50-70 parts by mass of starch, 3.5-5 parts by mass of sodium hydroxide and 400 parts by mass of water;
then adding 7-12 parts of 3-acrylamide dopamine and 0.3-1.5 parts of ammonium persulfate, and controlling the temperature to be 70-90 ℃ and stirring for 60-120min to obtain the hydrophilic modifier.
The allyl glycidyl ether, the starch and the epoxy group are subjected to ring opening, react with a glucose monomer in the starch to generate starch containing double bonds, and then are subjected to polymerization reaction with 3-methacrylamide dopamine, and the chemical equation of the reaction is shown as follows:
the porous filler has the sintering temperature of 500-600 ℃.
The invention discloses a preparation method of a microorganism reinforced solid-borne filler for treating urban black and odorous water, which comprises the steps of preparing a porous filler by adopting activated sludge, calcium carbonate and other raw materials, then reacting the calcium carbonate on the surface of the filler with dihydric phosphate to generate calcium hydroxy phosphate, coating a layer of hydroxy limestone in the filler and holes of the filler, increasing the biological adhesion performance of the material, and finally carrying out hydrophilic modification to obtain the microorganism reinforced solid-borne filler suitable for treating the urban black and odorous water; the allyl glycidyl ether, the starch and the epoxy group are subjected to ring opening and react with a glucose monomer in the starch to generate double-bond starch, and then the double-bond starch and the 3-methacrylamide dopamine are subjected to polymerization reaction to obtain a hydrophilic modifier; the filler has good hydrophilicity and biological affinity, can greatly improve the biological treatment effect of the filler, can allow the discharge of a small amount of domestic sewage while ensuring the cleanness of urban water, can keep the urban water clean for a long time while treating urban black and odorous water, and has long-term purification capacity.
Drawings
FIG. 1 is a Fourier infrared spectrum of a hydrophilic modifier prepared in example 2:
at 3370cm-1A telescopic absorption peak of water exists nearby, which indicates that water participates in the reaction; at 1465cm-1An asymmetric bending absorption peak of carbon-hydrogen bonds exists nearby, and is 1067cm-1An absorption peak of cyclic ether exists nearby, which indicates that the starch participates in the reaction; at 1603cm-1The expansion and contraction absorption peak of benzene ring skeleton exists nearby, and is 1304cm-1The expansion absorption peak of carbon-nitrogen single bond is present nearby and is 1662cm-1A stretching absorption peak of carbonyl exists nearby, which indicates that 3-acrylamide dopamine participates in the reaction; at 1149cm-1The antisymmetric telescopic absorption peak of the fatty ether exists nearby, which indicates that the allyl condensation existsThe reaction is carried out with water glycerol ether.
Detailed Description
The invention is further illustrated by the following specific examples:
the treatment method of the microorganism reinforced solid-supported filler for treating the urban black and odorous water body comprises the following steps:
step one, dividing an urban black and odorous water body with the ammonia nitrogen value of 23ppm and the COD value of 140ppm into an area A and an area B, and transferring water stored in the area A into the area B;
step two, adding a microbial compound microbial inoculum into the area A, wherein the adding amount of the microbial inoculum is 0.3kg/m2Decomposing the reducing substances and part of organic matters in the bottom mud;
step three, arranging microorganism strengthening and fixing fillers in the area A, then transferring the sewage in the area B into the area A, and simultaneously supplying oxygen to the water body in the area A;
step four, adding a microbial compound microbial inoculum into the area B, wherein the adding amount of the microbial inoculum is 0.3kg/m2Decomposing the reducing substances and part of organic matters in the bottom mud;
and fifthly, arranging microorganism strengthening and fixing fillers in the area B, transferring the sewage in the area A into the area B, and simultaneously supplying oxygen to the water body in the area B.
According to the method, the microorganism reinforced solid-supported filler prepared in each embodiment and comparative example is applied, and the COD value and ammonia nitrogen value in the wastewater are used for 30 days to judge the treatment effect of the wastewater.
The microbial compound microbial inoculum is selected from one or more of nocardia actinomycetes, bacillus subtilis, bacillus megaterium phosphate solubilizing bacteria, bacillus cereus, rhodopseudomonas palustris, filamentous bacteria and alcohol yeast.
Preferably: in the embodiment, the microbial compound microbial inoculum is prepared from nocardia actinomyces, bacillus subtilis, bacillus megaterium phosphate solubilizing bacteria, bacillus cereus, rhodopseudomonas palustris, filamentous bacteria and alcohol yeast according to equal proportion.
Example 1
A preparation method of a microorganism reinforced solid-supported filler for treating urban black and odorous water comprises the following steps:
s1, preparing porous filler, namely, dehydrating 100kg of activated sludge, drying, adding 20kg of clay, 10kg of bentonite, 30kg of calcium carbonate, 1kg of sodium humate and 2.3kg of pore-forming agent into a mixer, uniformly mixing and stirring, adding 20kg of binder, uniformly mixing and stirring, granulating, drying and molding 67 ℃, and roasting to obtain the porous filler;
s2, calcification of hydroxy phosphate, namely adding 60kg of porous filler into 300kg of dihydrogen phosphate solution with the mass percent of 5%, heating to 95 ℃, reacting for 6h, and washing with clear water after the reaction is finished to finish the calcification of hydroxy phosphate of the porous filler;
s3, hydrophilic treatment, namely adding 60kg of hydroxyl phosphate calcified porous filler into 200kg of ethanol solution of hydrophilic modifier with the mass percent content of 1%, soaking for 1h, and drying at 40 ℃ after finishing the soaking, thus finishing the hydrophilic treatment; the microorganism reinforced solid-carrying filler for treating the urban black and odorous water body can be obtained after the treatment. The pore-forming agent is carbon black.
The binder is a polyvinylpyrrolidone water solution with the mass percent of 5%.
The dihydric phosphate is ammonium dihydrogen phosphate.
The hydrophilic modifier is prepared by the following method:
controlling the temperature of 3kg of allyl glycidyl ether, 50kg of starch, 3.5kg of sodium hydroxide and 300kg of water, and stirring for 60min at 70 ℃ to obtain an allyl starch solution; then 7kg of 3-acrylamide dopamine and 0.3kg of ammonium persulfate are added, and the temperature is controlled at 70 ℃ and the mixture is stirred for 60min to obtain the hydrophilic modifier.
The sintering temperature of the porous filler is 500 ℃.
Example 2
A preparation method of a microorganism reinforced solid-supported filler for treating urban black and odorous water comprises the following steps:
s1, preparing porous filler, drying after dehydrating 140kg of activated sludge, adding 25kg of clay, 14kg of bentonite, 40kg of calcium carbonate, 3kg of sodium humate and 4.6kg of pore-forming agent into a mixer, mixing and stirring uniformly, adding 25kg of binder, stirring and mixing uniformly, granulating, drying, forming and roasting to obtain the porous filler;
s2, calcification of hydroxy phosphate, namely adding 70kg of porous filler into 350kg of dihydrogen phosphate solution with the mass percent of 8%, heating to 105 ℃, reacting for 12h, and washing with clear water after the reaction is finished to finish the calcification of hydroxy phosphate of the porous filler;
s3, hydrophilic treatment, namely adding 70kg of hydroxyl phosphate calcified porous filler into 250kg of ethanol solution of hydrophilic modifier with the mass percent content of 3%, soaking for 3h, and drying at 50 ℃ after finishing soaking, thus finishing the hydrophilic treatment; the microorganism reinforced solid-carrying filler for treating the urban black and odorous water body can be obtained after the treatment.
The pore-forming agent is activated carbon.
The binder is 8% of polyvinylpyrrolidone aqueous solution by mass percent.
The dihydric phosphate is sodium dihydrogen phosphate.
The hydrophilic modifier is prepared by the following method:
controlling the temperature of 4kg of allyl glycidyl ether, 57kg of starch, 4.2kg of sodium hydroxide and 330kg of water, and stirring for 100min at 78 ℃ to obtain an allyl starch solution;
then 10kg of 3-acrylamide dopamine and 0.8kg of ammonium persulfate are added, and the temperature is controlled to be 75 ℃ and the stirring is carried out for 100min, thus obtaining the hydrophilic modifier.
The firing temperature of the porous filler is 550 ℃.
Example 3
A preparation method of a microorganism reinforced solid-supported filler for treating urban black and odorous water comprises the following steps:
s1, preparing porous filler, drying after 180kg of activated sludge is dehydrated, adding 35kg of clay, 18kg of bentonite, 60kg of calcium carbonate, 5kg of sodium humate and 6.2kg of pore-forming agent into a mixer, mixing and stirring uniformly, adding 35kg of binder, stirring and mixing uniformly, granulating, drying, forming and roasting to obtain the porous filler;
s2, calcification of hydroxy phosphate, namely adding 80kg of porous filler into 400kg of dihydrogen phosphate solution with the mass percent of 10%, heating to 115 ℃, reacting for 20h, and washing with clear water after the reaction is finished to finish the calcification of hydroxy phosphate of the porous filler;
s3, performing hydrophilic treatment, namely adding 80kg of hydroxyl phosphate calcified porous filler into 300kg of ethanol solution of hydrophilic modifier with the mass percent of 5%, soaking for 5h, and drying at 60 ℃ after finishing the soaking, thus finishing the hydrophilic treatment; the microorganism reinforced solid-carrying filler for treating the urban black and odorous water body can be obtained after the treatment.
The pore-forming agent is sawdust.
The binder is 10% of polyvinylpyrrolidone aqueous solution by mass percent.
The dihydric phosphate is potassium dihydrogen phosphate.
The hydrophilic modifier is prepared by the following method:
controlling the temperature of 7kg of allyl glycidyl ether, 70kg of starch, 5kg of sodium hydroxide and 400kg of water, and stirring for 120min at 90 ℃ to obtain an allyl starch solution;
then 12kg of 3-acrylamide dopamine and 1.5kg of ammonium persulfate are added, and the temperature is controlled at 90 ℃ and the stirring is carried out for 120min, thus obtaining the hydrophilic modifier.
The sintering temperature of the porous filler is 600 ℃.
The COD value and ammonia nitrogen value test results of the wastewater treated by the above examples are shown in the following table:
| COD(ppm) | ammonia nitrogen value (ppm) | |
| Example 1 | 39 | 1.3 |
| Example 2 | 33 | 0.9 |
| Example 3 | 29 | 0.8 |
Comparative example 1
A preparation method of a microorganism reinforced solid-supported filler for treating urban black and odorous water comprises the following steps:
s1, preparing porous filler, namely, dehydrating 100kg of activated sludge, drying, adding 20kg of clay, 10kg of bentonite, 30kg of calcium carbonate, 1kg of sodium humate and 2.3kg of pore-forming agent into a mixer, uniformly mixing, adding 20kg of binder, uniformly mixing, granulating, drying, forming and roasting to obtain the porous filler;
s2, hydrophilic treatment, namely adding 60kg of hydroxyl phosphate calcified porous filler into 200kg of ethanol solution of hydrophilic modifier with the mass percent content of 1%, soaking for 1h, and drying at 40 ℃ after finishing the soaking, thus finishing the hydrophilic treatment; the microorganism reinforced solid-carrying filler for treating the urban black and odorous water body can be obtained after the treatment.
The pore-forming agent is carbon black.
The binder is a polyvinylpyrrolidone water solution with the mass percent of 5%.
The hydrophilic modifier is prepared by the following method:
controlling the temperature of 3kg of allyl glycidyl ether, 50kg of starch, 3.5kg of sodium hydroxide and 300kg of water, and stirring for 60min at 70 ℃ to obtain an allyl starch solution; then 7kg of 3-acrylamide dopamine and 0.3kg of ammonium persulfate are added, and the temperature is controlled at 70 ℃ and the mixture is stirred for 60min to obtain the hydrophilic modifier.
The sintering temperature of the porous filler is 500 ℃.
Comparative example 2
A preparation method of a microorganism reinforced solid-supported filler for treating urban black and odorous water comprises the following steps:
s1, preparing porous filler, namely, dehydrating 100kg of activated sludge, drying, adding 20kg of clay, 10kg of bentonite, 30kg of calcium carbonate, 1kg of sodium humate and 2.3kg of pore-forming agent into a mixer, uniformly mixing, adding 20kg of binder, uniformly mixing, granulating, drying, forming and roasting to obtain the porous filler;
s2, calcification of hydroxy phosphate, namely adding 60kg of porous filler into 300kg of dihydrogen phosphate solution with the mass percent of 5%, heating to 95 ℃, reacting for 6h, and washing with clear water after the reaction is finished to finish the calcification of hydroxy phosphate of the porous filler; the microorganism reinforced solid-carrying filler for treating the urban black and odorous water body can be obtained after the treatment.
The pore-forming agent is carbon black.
The binder is a polyvinylpyrrolidone water solution with the mass percent of 5%.
The dihydric phosphate is ammonium dihydrogen phosphate.
The sintering temperature of the porous filler is 500 ℃.
Comparative example 3
A preparation method of a microorganism reinforced solid-supported filler for treating urban black and odorous water comprises the following steps:
s1, preparing porous filler, namely, dehydrating 100kg of activated sludge, drying, adding 20kg of clay, 10kg of bentonite, 30kg of calcium carbonate and 2.3kg of pore-forming agent into a mixer, mixing and stirring uniformly, adding 20kg of binder, stirring and mixing uniformly, granulating, drying, molding and roasting to obtain the porous filler;
s2, calcification of hydroxy phosphate, namely adding 60kg of porous filler into 300kg of dihydrogen phosphate solution with the mass percent of 5%, heating to 95 ℃, reacting for 6h, and washing with clear water after the reaction is finished to finish the calcification of hydroxy phosphate of the porous filler;
s3, hydrophilic treatment, namely adding 60kg of hydroxyl phosphate calcified porous filler into 200kg of ethanol solution of hydrophilic modifier with the mass percent content of 1%, soaking for 1h, and drying at 40 ℃ after finishing the soaking, thus finishing the hydrophilic treatment; the microorganism reinforced solid-carrying filler for treating the urban black and odorous water body can be obtained after the treatment.
The pore-forming agent is carbon black.
The binder is a polyvinylpyrrolidone water solution with the mass percent of 5%.
The dihydric phosphate is ammonium dihydrogen phosphate.
The hydrophilic modifier is prepared by the following method:
3kg of allyl glycidyl ether, 50kg of starch, 3.5kg of sodium hydroxide and 300kg of water are stirred for 60min at the temperature of 70 ℃ to obtain the hydrophilic modifier.
The sintering temperature of the porous filler is 500 ℃.
The COD value and ammonia nitrogen value test results of the wastewater treated by the comparative example are shown in the following table:
| COD(ppm) | ammonia nitrogen value (ppm) | |
| Comparative example 1 | 87 | 5.1 |
| Comparative example 2 | 49 | 2.2 |
| Comparative example 3 | 65 | 3.8 |
Claims (6)
1. A preparation method of a microorganism reinforced solid-supported filler for treating urban black and odorous water comprises the following steps:
s1, preparing porous filler, namely, dehydrating 180 parts of activated sludge in 100-180 parts by mass, drying, adding 20-35 parts of clay, 10-18 parts of bentonite, 30-60 parts of calcium carbonate, 1-5 parts of sodium humate and 2.3-6.2 parts of pore-forming agent into a mixer, mixing and stirring uniformly, adding 20-35 parts of binder, stirring uniformly, granulating, drying, forming and roasting to obtain the porous filler;
s2, hydroxyl phosphate calcification treatment, namely adding 60-80 parts of porous filler into 300-400 parts of dihydrogen phosphate solution with the mass part of 5-10%, heating to 95-115 ℃, reacting for 6-20h, and washing with clear water after the reaction is finished to finish hydroxyl phosphate calcification of the porous filler;
s3, hydrophilic treatment, namely adding 60-80 parts of hydroxyl phosphate calcified porous filler into 200-300 parts of ethanol solution of 1-5% of hydrophilic modifier by mass, soaking for 1-5h, and drying at 40-60 ℃ after finishing the soaking, thus finishing the hydrophilic treatment; the microorganism reinforced solid-carrying filler for treating the urban black and odorous water body can be obtained after the treatment.
2. The preparation method of the microorganism reinforced immobilized filler for treating the urban black and odorous water body according to claim 1, is characterized in that: the pore-forming agent is carbon black or active carbon or sawdust.
3. The preparation method of the microorganism reinforced immobilized filler for treating the urban black and odorous water body according to claim 1, is characterized in that: the binder is a polyvinylpyrrolidone aqueous solution with the mass portion of 5% -10%.
4. The preparation method of the microorganism reinforced immobilized filler for treating the urban black and odorous water body according to claim 1, is characterized in that: the dihydric phosphate is ammonium dihydrogen phosphate or sodium dihydrogen phosphate or potassium dihydrogen phosphate.
5. The preparation method of the microorganism reinforced immobilized filler for treating the urban black and odorous water body according to claim 1, is characterized in that: the hydrophilic modifier is prepared by the following method:
controlling the temperature of 3-90 ℃ and stirring for 60-120min to obtain allyl starch solution, wherein 3-7 parts by mass of allyl glycidyl ether, 50-70 parts by mass of starch, 3.5-5 parts by mass of sodium hydroxide and 400 parts by mass of water;
then adding 7-12 parts of 3-acrylamide dopamine and 0.3-1.5 parts of ammonium persulfate, and controlling the temperature to be 70-90 ℃ and stirring for 60-120min to obtain the hydrophilic modifier.
6. The preparation method of the microorganism reinforced immobilized filler for treating the urban black and odorous water body according to claim 1, is characterized in that: the porous filler has the sintering temperature of 500-600 ℃.
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