CN102285742B - Method for wastewater treatment by utilizing KM biological contact oxidation process - Google Patents
Method for wastewater treatment by utilizing KM biological contact oxidation process Download PDFInfo
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- CN102285742B CN102285742B CN201110158764A CN201110158764A CN102285742B CN 102285742 B CN102285742 B CN 102285742B CN 201110158764 A CN201110158764 A CN 201110158764A CN 201110158764 A CN201110158764 A CN 201110158764A CN 102285742 B CN102285742 B CN 102285742B
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Abstract
The invention relates to a biological contact oxidation process and provides a method for wastewater treatment by utilizing a KM biological contact oxidation process. The method is characterized in that a biological belt and BM (beneficial microorganism) filler are used as carriers, a biological strain with a specific function is immobilized on the biological belt and BM filler, and a modern biological contact oxidation process is combined. By using the method provided by the invention, the removal rates of various pollutants especially ammonia nitrogen by the biological contact oxidation process are greatly improved, the problem of poor ammonia nitrogen removal effect is solved, the effluent stably reaches the national pollutant discharge standard of wastewater treatment plants, and both the operation cost and investment cost are lower.
Description
Technical field
The present invention relates to a kind of microbial film contact oxidation technology, the method that a kind of specifically KM of utilization biological contact oxidation metallization processes is carried out WWT.
Background technology
The microbial film contact oxidation technology that with the ontozone is carrier is widely used in the city domestic sewage treating processes; This technology have construction period weak point, instant effect, occupation of land less, characteristics such as operation maintenance management is simple, energy consumption is low, maintenance cost is low; But in most contact oxidation technology system; Its water outlet ammonia nitrogen and total nitrogen can not be up to standard, influenced whole structure, received certain restriction.
Under the situation of the serious eutrophication of China's water resources; Press for pollutents such as a kind of COD that can effectively degrade; Novel process that again can the steady removal ammonia nitrogen; This arts demand has characteristics such as investment construction, running cost are lower simultaneously concurrently, to realize energy-saving and emission-reduction, protection environment, the human target of protection.
Summary of the invention
The objective of the invention is in order to overcome the weak point of above-mentioned background technology; The method that provides a kind of KM of utilization biological contact oxidation metallization processes to carry out WWT; It can improve biology greatly and touch oxidizing process to all contaminations ammonia-N removal rate particularly; Solve the problem of ammonia nitrogen removal poor effect, make stable water outlet reach country's " urban wastewater treatment firm pollutant emission standard " (GB18918-2002), and working cost and cost of investment are all cheaper.
The present invention seeks to realize through following technical scheme.
KM biological contact oxidation metallization processes is to be carrier with ontozone and BM filler, the fixing biological inoculum of specific function on ontozone and BM filler, and combine with modern biological contact oxidation metallization processes, thereby integrated a kind of novel sewage treatment process.
The ontozone is as the biological bacteria carrier; In actual engineering, be widely used; It has huge specific surface area and unique anaerobism, anoxic, aerobic three districts; And, can improve in the sewage the particularly clearance of COD of pollutent greatly in the composite bacteria of its fixing various Persistent organic pollutants of degrading in surface.
BM filling surface wetting ability is strong, and sticking power is good, easy to be filmed.Carrier surface can be fixed a large amount of high efficiency nitrification bacterium, in operational process, can rapidly ammonia nitrogen be converted into nitrite nitrogen, and nitrite nitrogen also cooperates Digestive system to reflux, and makes short-cut denitrification to realize smoothly, thereby reduces the energy consumption and the residence time of system.
The method that a kind of KM of utilization biological contact oxidation of the present invention metallization processes is carried out WWT, this method may further comprise the steps successively:
(1) sewage gets into grid and removes large-sized swimmer, suspended substance and less solid matter, such as branch, leaf, discarded clothes, waste plastic bag and solid-state organism etc.;
(2) through lift pump sewage is risen in the subsequent disposal structures;
(3) remove the bigger inorganic particle of density through sedimentation basin, such as sand grains etc.;
(4) get into anoxic pond, regulate water quality, carry out denitrification process;
(5) get into the ontozone biochemistry pool, arrange the ontozone in the said pond, add efficient composite bacteria, be aided with micro-pore aeration, biological bacteria raised growth breeding on the surface, ontozone forms microbial film, in this step, is that the main pollutent overwhelming majority is removed with COD; Said efficient composite bacteria by bacillus, nitrobacteria, denitrifying bacterium, short-cut denitrification bacterium, polyP bacteria, phenol bacterium, more than 300 kind of composite floras that bacterial strain is formed such as decolouring bacterium etc. fall; The viable count of every gram product is up to hundred million of hundreds ofs, and existence under the differing temps environment can suit;
(6) get into the BM nitrification tank; Drop into the BM filler in the said pond, add the high efficiency nitrification bacterium, be aided with micro-pore aeration; Nitrifier grows on the BM filler and hangs film; Form biological moving bed, most ammonia nitrogens are converted to nitrous acid nitrogen, nitrate nitrogen in this step, and pollutents such as the COD of remainder can further be removed; Said high efficiency nitrification bacteria agent is to utilize contaminant degradation mikrobe from the nature screening and separating as bacterial classification; Cooperate the microbiobacterial agent product that forms through biotechnology enlarged culturing and compound, its composition mainly is Nitrosomonas, nitrosification coccus, nitrosification vibrios, nitrosification bacillus, nitrated Zymomonas mobilis, nitrated coccus, nitrated vibrios, bacterium nitrobacter, nutritive salt etc.;
(7) get into the nitrification liquid return-flow system, return step (4), accomplish denitrification thereby a part of tail water is back to anoxic pond;
(8) a part of tail water gets into settling tank, in settling tank, realizes the muddy water shunting through deposition;
(9) treated water again through the sterilization after qualified discharge;
(10) a part of mud is back to anoxic pond through sludge pump in anoxic pond, ontozone biochemistry pool, the BM digester, and a part of mud gets into sludge thickener again through the outward transport of dehydration back.
In technique scheme, said KM biological contact oxidation metallization processes is in the rectangle form pool of a string intercommunication that joins end to end, to realize, middle back three parts before the pond is divided into; The fore portion pond is conventional anoxic pond, in establish diving mixer, middle portion is the ontozone biochemistry pool; In the pond, arrange the ontozone, add efficient composite bacteria; The rear portion is divided into the BM nitrification tank, in the pond, drops into BM filler and high efficiency nitrification bacterium, and said ontozone biochemistry pool all links to each other with Blast mechanism with the BM nitrification tank.
In technique scheme; The bottom of said anoxic pond, ontozone biochemistry pool and BM nitrification tank is provided with the sludge pipe that is used to export mud; The output terminal of said sludge pipe links to each other with anoxic pond with sludge thickener respectively through sludge pump; The mud output terminal of sludge thickener is connected to sludge dewatering mechanism, and the supernatant in the sludge thickener is back to anoxic pond.
The present invention compared with prior art has the following advantages:
1, stable water outlet reaches country's " urban wastewater treatment firm pollutant emission standard " (GB18918-2002).
2, adopt this method to handle waste water, save land 30 ~ 50%, invest and be 70% of traditional technology.
3, running cost is low, in the energy consumption 0.12KWh/ ton, handles sewage about 0.25 yuan of/ton water.
4, operation, maintenance management are simple.
5, sludge output is few, has only 30 ~ 50% of traditional method.
6, do not receive the restriction of sewage work's scale.
7, the investment construction cost of utilization this method is low, both can newly-built sewage work, also can transform use to building sewage work, and all can realize.
Description of drawings
The method flow diagram that Fig. 1 carries out WWT for a kind of KM of utilization biological contact oxidation of the present invention metallization processes.
Fig. 2 carries out the sewage processing system synoptic diagram for KM biological contact oxidation metallization processes in the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further described.
Method as shown in Figure 1, that present embodiment provides a kind of KM of utilization biological contact oxidation metallization processes to carry out WWT, this method may further comprise the steps successively:
(1) sewage gets into grid and removes large-sized swimmer, suspended substance and less solid matter, such as branch, leaf, discarded clothes, waste plastic bag and solid-state organism etc.;
(2) through lift pump sewage is risen in the subsequent disposal structures;
(3) remove the bigger inorganic particle of density through sedimentation basin, such as sand grains etc.;
(4) get into anoxic pond, regulate water quality, carry out denitrification process;
(5) get into the ontozone biochemistry pool, arrange the ontozone in the said pond, add efficient composite bacteria, be aided with micro-pore aeration, biological bacteria raised growth breeding on the surface, ontozone forms microbial film, in this step, is that the main pollutent overwhelming majority is removed with COD; Said efficient composite bacteria by bacillus, nitrobacteria, denitrifying bacterium, short-cut denitrification bacterium, polyP bacteria, phenol bacterium, more than 300 kind of composite floras that bacterial strain is formed such as decolouring bacterium etc. fall; The viable count of every gram product is up to hundred million of hundreds ofs, and existence under the differing temps environment can suit;
(6) get into the BM nitrification tank; Drop into the BM filler in the said pond, add the high efficiency nitrification bacterium, be aided with micro-pore aeration; Nitrifier grows on the BM filler and hangs film; Form biological moving bed, most ammonia nitrogens are converted to nitrous acid nitrogen, nitrate nitrogen in this step, and pollutents such as the COD of remainder can further be removed; Said high efficiency nitrification bacteria agent is to utilize contaminant degradation mikrobe from the nature screening and separating as bacterial classification; Cooperate the microbiobacterial agent product that forms through biotechnology enlarged culturing and compound, its composition mainly is Nitrosomonas, nitrosification coccus, nitrosification vibrios, nitrosification bacillus, nitrated Zymomonas mobilis, nitrated coccus, nitrated vibrios, bacterium nitrobacter, nutritive salt etc.;
(7) get into the nitrification liquid return-flow system, return step (4), accomplish denitrification thereby a part of tail water is back to anoxic pond;
(8) a part of tail water gets into settling tank, in settling tank, realizes the muddy water shunting through deposition;
(9) treated water again through the sterilization after qualified discharge;
(10) a part of mud is back to anoxic pond through sludge pump in anoxic pond, ontozone biochemistry pool, the BM digester, and a part of mud gets into sludge thickener again through the mud cake outward transport of dehydration back.
As shown in Figure 2, in the above-described embodiments, said technology is in the rectangle form pool of a string intercommunication that joins end to end, to realize; The pond be divided into before in the back three parts, the fore portion pond is conventional anoxic pond 1, in establish diving mixer 5; The anoxic pond front end is provided with water-in 4, and middle portion is an ontozone biochemistry pool 2, in the pond, arranges ontozone 7; The rear portion is divided into BM nitrification tank 3, in the pond, drops into BM filler 8, and said ontozone biochemistry pool 2 all links to each other with Blast mechanism 6 with BM nitrification tank 3.
The bottom of said anoxic pond 1, ontozone biochemistry pool 2 and BM nitrification tank 3 is provided with the sludge pipe 9 that is used to export mud; The output terminal of said sludge pipe 9 links to each other with anoxic pond 1 with sludge thickener respectively through sludge pump; The mud output terminal of sludge thickener is connected to sludge dewatering mechanism, and the supernatant in the sludge thickener is back to anoxic pond 1.
Claims (5)
1. method of utilizing KM biological contact oxidation metallization processes to carry out WWT is characterized in that this method may further comprise the steps successively:
(1) sewage gets into grid and removes large-sized swimmer, suspended substance and less solid matter;
(2) through lift pump sewage is risen in the subsequent disposal structures;
(3) remove the bigger inorganic particle of density through sedimentation basin;
(4) get into anoxic pond, regulate water quality, carry out denitrification process;
(5) get into the ontozone biochemistry pool, arrange the ontozone in the said pond, add efficient composite bacteria, be aided with micro-pore aeration, biological bacteria raised growth breeding on the surface, ontozone forms microbial film, in this step, is that the main pollutent overwhelming majority is removed with COD;
(6) get into the BM nitrification tank; Drop into the BM filler in the said pond, add the high efficiency nitrification bacterium, be aided with micro-pore aeration; Nitrifier grows on the BM filler and hangs film; Form biological moving bed, most ammonia nitrogens are converted to nitrous acid nitrogen, nitrate nitrogen in this step, and the COD pollutent of remainder can further be removed;
(7) get into the nitrification liquid return-flow system, return step (4), accomplished denitrification thereby a part of tail water is back to anoxic pond;
(8) a part of tail water gets into settling tank, in settling tank, realizes mud-water separation through deposition;
(9) treated water again through the sterilization after qualified discharge;
(10) a part of mud is back to anoxic pond through sludge pump in anoxic pond, ontozone biochemistry pool, the BM digester, and a part of mud gets into sludge thickener again through the outward transport of dehydration back.
2. the method that a kind of KM of utilization biological contact oxidation metallization processes according to claim 1 is carried out WWT; It is characterized in that: the efficient composite bacteria described in the step (5) by bacillus, nitrobacteria, denitrifying bacterium, short-cut denitrification bacterium, polyP bacteria, phenol bacterium, the composite flora formed of decolouring bacterium fall; The viable count of every gram product is up to hundred million of hundreds ofs, and existence under the differing temps environment can suit.
3. the method that a kind of KM of utilization biological contact oxidation metallization processes according to claim 1 is carried out WWT; It is characterized in that: the high efficiency nitrification bacteria agent described in the step (6) is to utilize contaminant degradation mikrobe from the nature screening and separating as bacterial classification, cooperates the microbiobacterial agent product that forms through biotechnology enlarged culturing and compound; Its composition mainly is Nitrosomonas, nitrosification coccus, nitrosification vibrios, nitrosification bacillus, nitrated Zymomonas mobilis, nitrated coccus, nitrated vibrios, bacterium nitrobacter, nutritive salt.
4. the method that a kind of KM of utilization biological contact oxidation metallization processes according to claim 1 is carried out WWT; It is characterized in that: said KM biological contact oxidation metallization processes is in the rectangle form pool of a string intercommunication that joins end to end, to realize, middle back three parts before the pond is divided into, and the fore portion pond is conventional anoxic pond; In establish diving mixer; Middle portion is the ontozone biochemistry pool, in the pond, arranges the ontozone, adds efficient composite bacteria, and the rear portion is divided into the BM nitrification tank; In the pond, drop into BM filler and high efficiency nitrification bacterium, said ontozone biochemistry pool all links to each other with Blast mechanism with the BM nitrification tank.
5. the method that a kind of KM of utilization biological contact oxidation metallization processes according to claim 4 is carried out WWT; It is characterized in that: the bottom of said anoxic pond, ontozone biochemistry pool and BM nitrification tank is provided with the sludge pipe that is used to export mud; The output terminal of said sludge pipe links to each other with anoxic pond with sludge thickener respectively through sludge pump; The mud output terminal of sludge thickener is connected to sludge dewatering mechanism, and the supernatant in the sludge thickener is back to anoxic pond.
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| CN1344689A (en) * | 2001-10-23 | 2002-04-17 | 华南理工大学 | Efficient biochemical treamtent method and equipment for domestic sewage |
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