CN107601775A - High COD, low CN ratios a kind of waste water treatment process - Google Patents
High COD, low CN ratios a kind of waste water treatment process Download PDFInfo
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- CN107601775A CN107601775A CN201710983908.2A CN201710983908A CN107601775A CN 107601775 A CN107601775 A CN 107601775A CN 201710983908 A CN201710983908 A CN 201710983908A CN 107601775 A CN107601775 A CN 107601775A
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Abstract
The present invention relates to a kind of high COD, the waste water treatment process of low CN ratios, described waste water treatment process includes separation of solid and liquid, fermentation, biofermentation, precipitation, biochemical treatment and coagulation, and the present invention has the advantages of technique is simple, operating cost is low, manipulation is simple.
Description
Technical field
The invention belongs to technical field of waste water processing, and in particular to a kind of high COD, the waste water treatment process of low CN ratios.
Background technology
Passed through at present in wastewater processing technology frequently with adding alkali blow-off method, multistage sludge, chemical precipitation method and break to add
Chlorine method, but the defects of certain in use be present, it is mainly manifested in plus the suitable ammonia-nitrogen content of alkali blow-off method is more than
500ppm waste water, and it is not easy to operate, secondary pollution is easily caused, multistage sludge capital cost height is, it is necessary to additional carbon（First
Alcohol）, water outlet is unable to qualified discharge, and the suitable ammonia-nitrogen content of chemical precipitation method is less than 500ppm waste water, generates magnesium ammonium phosphate sediment,
Whard to control, the suitable ammonia-nitrogen content of break point chlorination method is less than 50ppm waste water, and operating cost is high, easily causes secondary pollution, is not easy
Operation.
The content of the invention
The invention aims to overcome the deficiencies in the prior art, and provide a kind of technique is simple, operating cost is low, behaviour
Vertical simple high COD, the waste water treatment process of low CN ratios.
The object of the present invention is achieved like this：A kind of high COD, low CN ratios waste water treatment process, described waste water
Handling process comprises the following steps：
Step 1：Separation of solid and liquid, by industrial wastewater or breeding wastewater through solid-liquid separating machine, the large granular impurity in waste water is removed；
Step 2：Fermentation, the waste water after the removal large granular impurity obtained in step 1 is put into fermentation tank and carries out Anaerobic Treatment,
Most organic matter is removed, organic nitrogen is transformed into inorganic nitrogen；
Step 3：Biofermentation, the waste water after progress anaerobic fermentation in step 2 is put into biological denitrificaion pond and handled, improves waste water
In C/N ratios；
Step 4：Precipitation, the waste water after biofermentation is precipitated, makes separation of solid and liquid；
Step 5：Biochemical treatment, the waste water after being precipitated in step 4 is sent into the processing of A-A-0 biochemical process, when water quality reaching standard is through end
Directly discharge in heavy pond；
Step 6：Coagulation, when the water quality after being handled in step 5 is not up to standard, starts coagulating basin and handled, after water quality reaching standard
Discharged after sinking eventually；
Biofermentation in described step 5 is mainly made up of aerating system, medicine system, activated sludge, and aerating system
Unilateral aeration is implemented, aerobic zone, anoxic zone and anaerobic zone are formed in biological denitrificaion pond.
Being added in biological denitrificaion pond in described step 5 has ferrous sulfate.
Beneficial effects of the present invention：In the use of the present invention, using the oxidation-reduction quality of iron ion, by ammonia nitrogen direct oxidation
Into nitrogen, the oxidation operation of bio-refractory is reduced into the organic matter of small molecule, reduces the ammonia-nitrogen content in waste water, is improved
The C/N ratios of waste water, are easy to biochemical treatment, and using the suction-operated of activated carbon, the easy activated carbon of sludge is brought together for core,
Biological core is formed, core periphery is aerobic, and core is anaerobism, in the case where an activated carbon core is rolled into a ball, forms nitration denitrification, reaches denitrogenation
Purpose, while reducing operating cost, make discharged wastewater met the national standard, in addition, in biological denitrificaion pond plus ferrous sulfate, mainly
Using ferrous ion it is oxidized after, become ferric ion, the oxidisability that ferric ion has, directly nitrate aoxidized
Into nitrogen, ammonia nitrogen is removed, using the reproducibility of ferrous ion, it is easily raw that the organic matter of bio-refractory is reduced into multiple small molecules
Change the organic matter of degraded, provide carbon source for denitrifying bacteria, utilize ammonia oxidation bacteria in aerobic zone, organic nitrogen is first transformed into inorganic
Nitrogen, nitrate is finally converted to, in anoxic zone, using denitrifying bacterium, is converted into nitrogen, anaerobism ammonia oxygen is utilized in anaerobic zone
Change bacterium and ammonium ion is oxidized to nitrogen by energy of nitrite, using the suction-operated of activated carbon, the easy activated carbon of sludge is core
The heart is brought together, and forms biological core, and core periphery is aerobic, and core is anaerobism, and in the case where an activated carbon core is rolled into a ball, it is anti-to form nitrification
Nitrification, reaches the purpose of denitrogenation, nitrification and denitrification, the transfer of ammonium is completed in a pond, the clearance of ammonia nitrogen can reach
Clearance to more than 95%, COD is only 70% or so, improves the C/N ratios of waste water on year-on-year basis, is follow-up A-A--O department of biochemistry
System provides suitable nutritive proportion.
Embodiment
With reference to embodiment, the present invention is described further.
Embodiment 1
A kind of high COD, low CN ratios waste water treatment process, described waste water treatment process comprise the following steps：Step 1：Gu
Liquid is separated, and by industrial wastewater or breeding wastewater through solid-liquid separating machine, the large granular impurity in waste water is removed；Step 2：Fermentation,
Waste water after the removal large granular impurity obtained in step 1 is put into fermentation tank and carries out Anaerobic Treatment, removal is most to be had
Machine thing, organic nitrogen is transformed into inorganic nitrogen；Step 3：Biofermentation, the waste water after progress anaerobic fermentation in step 2 is put into life
Handled in thing denitrification tank, improve the C/N ratios in waste water；Step 4：Precipitation, the waste water after biofermentation is precipitated, and is made solid
Liquid separates；Step 5：Biochemical treatment, the waste water after being precipitated in step 4 is sent into the processing of A-A-0 biochemical process, when water quality reaching standard passes through
Final deposition pool directly discharges；Step 6：Coagulation, when the water quality after being handled in step 5 is not up to standard, starts coagulating basin and handled, when
Discharged after water quality reaching standard after sinking eventually；Biofermentation in described step 5 mainly has aerating system, medicine system, activity
Sludge forms, and aerating system implements unilateral aeration, and aerobic zone, anoxic zone and anaerobic zone are formed in biological denitrificaion pond, described
Step 5 in biological denitrificaion pond in add have ferrous sulfate.
In the use of the present invention, using the oxidation-reduction quality of iron ion, ammonia nitrogen is direct oxidation into nitrogen, by difficult biochemical drop
The oxidation operation of solution is reduced into the organic matter of small molecule, reduces the ammonia-nitrogen content in waste water, improves the C/N ratios of waste water, easily
In biochemical treatment, using the suction-operated of activated carbon, the easy activated carbon of sludge is brought together for core, forms biological core, outside core
Enclose to be aerobic, core is anaerobism, in the case where an activated carbon core is rolled into a ball, forms nitration denitrification, reaches the purpose of denitrogenation, reduces operation
While expense, make discharged wastewater met the national standard, in addition, adding ferrous sulfate in biological denitrificaion pond, mainly utilize ferrous ion
After oxidized, become ferric ion, the oxidisability that ferric ion has, nitrate is directly oxidized to nitrogen, remove ammonia
Nitrogen, using the reproducibility of ferrous ion, the organic matter of bio-refractory is reduced into the organic of the easy biochemical degradation of multiple small molecules
Thing, carbon source is provided for denitrifying bacteria, utilize ammonia oxidation bacteria in aerobic zone, organic nitrogen is first transformed into inorganic nitrogen, finally changed
Into nitrate, in anoxic zone, using denitrifying bacterium, be converted into nitrogen, anaerobic zone using anaerobic ammonia oxidizing bacteria by ammonium from
Son is oxidized to nitrogen by energy of nitrite, and using the suction-operated of activated carbon, the easy activated carbon of sludge is that core gathers one
Rise, form biological core, core periphery is aerobic, and core is anaerobism, in the case where an activated carbon core is rolled into a ball, forms nitration denitrification, reaches
The purpose of denitrogenation, nitrification and denitrification, the transfer of ammonium are completed in a pond, the clearance of ammonia nitrogen can reach more than 95%,
COD clearance is only 70% or so, improves the C/N ratios of waste water on year-on-year basis, is provided for follow-up A-A--O biochemical systems suitable
Suitable nutritive proportion.
Claims (3)
1. a kind of high COD, low CN ratios waste water treatment process, it is characterised in that：Described waste water treatment process includes as follows
Step：
Step 1：Separation of solid and liquid, by industrial wastewater or breeding wastewater through solid-liquid separating machine, the large granular impurity in waste water is removed；
Step 2：Fermentation, the waste water after the removal large granular impurity obtained in step 1 is put into fermentation tank and carries out Anaerobic Treatment,
Most organic matter is removed, organic nitrogen is transformed into inorganic nitrogen；
Step 3：Biofermentation, the waste water after progress anaerobic fermentation in step 2 is put into biological denitrificaion pond and handled, improves waste water
In C/N ratios；
Step 4：Precipitation, the waste water after biofermentation is precipitated, makes separation of solid and liquid；
Step 5：Biochemical treatment, the waste water after being precipitated in step 4 is sent into the processing of A-A-0 biochemical process, when water quality reaching standard is through end
Directly discharge in heavy pond；
Step 6：Coagulation, when the water quality after being handled in step 5 is not up to standard, starts coagulating basin and handled, after water quality reaching standard
Discharged after sinking eventually.
2. a kind of high COD according to claim 1, the waste water treatment process of low CN ratios, it is characterised in that：Described step
Biofermentation in rapid 5 is mainly made up of aerating system, medicine system, activated sludge, and aerating system implements unilateral aeration,
Aerobic zone, anoxic zone and anaerobic zone are formed in biological denitrificaion pond.
3. a kind of high COD according to claim 1, the waste water treatment process of low CN ratios, it is characterised in that：Described step
Being added in biological denitrificaion pond in rapid 5 has ferrous sulfate.
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| CN201710983908.2A CN107601775A (en) | 2017-10-20 | 2017-10-20 | High COD, low CN ratios a kind of waste water treatment process |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101037282A (en) * | 2007-04-27 | 2007-09-19 | 凌猛 | Water treatment new combined technique with high purification function |
| CN103420480A (en) * | 2013-08-07 | 2013-12-04 | 浙江大学 | Anaerobic molysite biological nitrogen removal process |
| CN104860487A (en) * | 2015-06-04 | 2015-08-26 | 吴祥林 | Sewage treating method adopting A-A-O treating technology without total nitrogen removing by additional carbon source |
| CN105347618A (en) * | 2015-11-15 | 2016-02-24 | 农业部沼气科学研究所 | Biological denitrogenation system for waste water containing high ammonia nitrogen |
| KR20170040900A (en) * | 2015-10-06 | 2017-04-14 | 이동주 | Process for nitrogen exclusion in biological waste water treatment system |
| CN106830322A (en) * | 2017-03-02 | 2017-06-13 | 南京市市政设计研究院有限责任公司 | It is a kind of suitable for low CN than modified form AAO ponds that sewage/wastewater is administered |
-
2017
- 2017-10-20 CN CN201710983908.2A patent/CN107601775A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101037282A (en) * | 2007-04-27 | 2007-09-19 | 凌猛 | Water treatment new combined technique with high purification function |
| CN103420480A (en) * | 2013-08-07 | 2013-12-04 | 浙江大学 | Anaerobic molysite biological nitrogen removal process |
| CN104860487A (en) * | 2015-06-04 | 2015-08-26 | 吴祥林 | Sewage treating method adopting A-A-O treating technology without total nitrogen removing by additional carbon source |
| KR20170040900A (en) * | 2015-10-06 | 2017-04-14 | 이동주 | Process for nitrogen exclusion in biological waste water treatment system |
| CN105347618A (en) * | 2015-11-15 | 2016-02-24 | 农业部沼气科学研究所 | Biological denitrogenation system for waste water containing high ammonia nitrogen |
| CN106830322A (en) * | 2017-03-02 | 2017-06-13 | 南京市市政设计研究院有限责任公司 | It is a kind of suitable for low CN than modified form AAO ponds that sewage/wastewater is administered |
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