CN104086048B - A kind of steel industry nitrogenous effluent treatment method - Google Patents
A kind of steel industry nitrogenous effluent treatment method Download PDFInfo
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- CN104086048B CN104086048B CN201410354961.2A CN201410354961A CN104086048B CN 104086048 B CN104086048 B CN 104086048B CN 201410354961 A CN201410354961 A CN 201410354961A CN 104086048 B CN104086048 B CN 104086048B
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Abstract
Disclosure one steel industry nitrogenous effluent treatment method, including CMBR technology, specifically comprises the following steps that nitrogenous effluent is introduced in CMBR reaction tank by regulating reservoir by (1), adds carbon source and potassium dihydrogen phosphate, keeps dissolved oxygen at 0.2-0.5mg/L；(2) step 1 being reacted the mixed liquor after 16h introduce in activated sludge seperator, by the mud after separating or enter sludge storage pool, or introduce CMBR reaction tank and continue reaction, clear liquid discharging stores to clear water reserviors, determines reuse amount and discharge capacity according to practical situation；The present invention collect anoxia, aerobic, precipitate, concentrate, be located away from one, greatly reduce floor space, shorten technological process, film permeate water stabilization, reach the one-level requirement of " steel and iron industry water emission standard ".
Description
Technical field
The present invention relates to Industrial Waste Water Treatments field, particularly a kind of steel industry nitrogenous effluent treatment method.
Background technology
When steel industry produces, using substantial amounts of nitric acid, these nitric acid overwhelming majority can be converted into nitrate, then drains into Waste Water Treatment, exceeds standard thus result in waste water total nitrogen.
The method of this kind of waste water of existing process adopts " anoxia+aerobic+precipitation " method, specifically under anoxic conditions, add carbon source, microcosmic salt as nutrient, utilize the biodegradation of denitrifying bacteria, remove the nitrate nitrogen in waste water, anoxic pond water outlet enters Aerobic Pond, removes residue carbon source by aerobic microbiological, and then outputted aerobic water entrance sedimentation tank carries out mud-water separation, supernatant qualified discharge, base sludge enters concentration basin and improves solid content, then carries out mechanical dehydration, and mud cake outward transport is disposed；It was verified that this method has the disadvantage in that (1) sludge loading is low, floor space is big, it is necessary to builds and organizes anoxic pond, Aerobic Pond, sedimentation tank, concentration basin more；(2) microorganism is easily along with water outlet is run off, and treatment effect is unstable.Waste water is when different cell body flowing, and water outlet can carry a large amount of microorganism secretly, and the microbial biomass of single cell body declines, thus affecting the removal of Pollutants in Wastewater；(3) sedimentation tank mud-water separation weak effect.The concentration of activated sludge and water very close to, adopt the method for gravitational settling to be beneficial to isolating active mud and water, thus affecting effluent quality；(3) utilization of carbon source rate is not high.Traditional handicraft is easily excessive when adding carbon source, it is necessary to adopt aerobic process guarantee water outlet COD stably reaching standard；(4) complex treatment process, automaticity is low, and operation maintenance difficulty is bigger.
Self-cleaning concentration membrane bioreaction technology (CMBR), it is that one utilizes membrane separation technique and circulating carrier biomembrance process (biochemical technology) that overclocking is vibrated on-line cleaning and the wastewater efficient treatment technology of highdensity plywood biodegradation technique combination, can be widely applied to life, Industrial Wastewater Treatment, it is applied in steel industry waste water the denitrogenation processing of nitrate, has not yet to see report.
Summary of the invention
For the problems referred to above, it is provided that a kind of steel industry nitrogenous effluent treatment method, by microbial treatments, controlling within 15mg/L by the nitrate nitrogen in waste water, improve stability and the efficiency of wastewater treatment, the present invention is achieved in that
A kind of steel industry nitrogenous effluent treatment method, including CMBR technology, it is characterised in that comprise the following steps:
(1) nitrogenous effluent is introduced reaction 0.5 ~ 16h in CMBR reaction tank by regulating reservoir, add carbon source and potassium dihydrogen phosphate, keep dissolved oxygen at 0.2-0.5mg/L；
(2) being introduced in sludge separator by reacted for step 1 mixed liquor, as required, by the mud after separating or enter sludge storage pool, or introduce CMBR reaction tank and continue reaction, clear liquid discharging stores to clear water reserviors, determines reuse amount and discharge capacity according to practical situation.
Preferably, the present invention adds in step 1 in step 1 carbon source and potassium dihydrogen phosphate, make carbon in nitrogenous effluent, nitrogen, phosphorus mass ratio be 100:(25 ∽ 5): (5 ~ 1).
Preferably, carbon source described in step 1 of the present invention is methanol.
Preferably, sludge separator described in step 2 step 2 of the present invention is vibration-type membrane seperator, uses PVDF/PTFE organic membrane, membrane aperture 10 ~ 100nm, operating pressure 3-5bar, frequency of vibration 50HZ, Oscillation Amplitude 12-17mm.
Different from existing steel mill cold rolling wastewater denitrification treatment process, the present invention adopts the technology that CMBR biological denitrificaion combines with activated sludge seperator, collection anoxia, aerobic, precipitate, concentrate, be located away from integrally, greatly reduce floor space, shorten technological process；CMBR reaction tank, when additional carbon, by the biodegradation of activated sludge, removes the total nitrogen in water；Activated sludge seperator carries out feed separation work by organic ultrafilter membrane, all of microorganism and float are all without through film, thus not resulting in the loss of microorganism, be conducive to improving reaction tank Biomass, diaphragm can reciprocal dither by special machine device, there is removal precision high, disposal ability is big, automatically clean, the advantage of Automatic Control, can accurately control carbon source dosage, do not remain carbon source to produce, the sludge concentration of biological reaction pool is up to more than 15g/L (other techniques are generally 3 ~ 5g/L) film permeate water stabilization, reach " steel and iron industry water emission standard " (GB13456-2012) requirement；The present invention adopts sludge separator to eliminate traditional sedimentation tank and concentration basin, it is possible to make system simplify, and saves space and operation, reduces investment and operating cost.
Accompanying drawing explanation
Fig. 1 is embodiment of the present invention process flow diagram.
Detailed description of the invention
Below by concrete example, technical scheme is described further.
Embodiment 1 adopts the method for the present invention to process the high concentration nitrogen-containing waste water that cold rolling workshop section of certain steel mill discharges.
(1) waste water cold rolling for certain steel mill workshop section discharged introduces regulating reservoir, and in measurement water, total average nitrogen concentration 600mg/L, COD mean concentration 40mg/L, PH are between 6 ~ 9.
(2) being introduced by nitrogenous effluent in CMBR reaction tank, it is 1600mg/L that methanol adds concentration, and potassium dihydrogen phosphate adds concentration 24mg/L；Denitrification rates 0.06kgNO3-N (kgMLSS d)；Sludge loading 15g/L；Set diving mixer in pond and carry out mix and blend, the 16h hour time of staying；
(3) being introduced in sludge separator by the mixed liquor that CMBR reaction tank is discharged, in the present embodiment, activated sludge seperator is vibration-type membrane seperator, uses PVDF/PTFE organic membrane, membrane aperture 50nm, membrane flux 200L/ (m2H), operating pressure 3-5bar, frequency of vibration 50HZ, Oscillation Amplitude 13mm.
In concrete operations, in nitrogenous effluent introducing CMBR reaction tank, the time of reaction is set as between 0.5-16h according to concrete condition；Vibration-type membrane seperator PVDF/PTFE organic membrane aperture can select in the scope of 10 ~ 100nm, and Oscillation Amplitude is in the scope of 12-17mm.
Sludge storage pool after separating is entered sludge storage pool, clear liquid discharging stores to clear water reserviors, reuse amount and discharge capacity is determined according to practical situation, the total average nitrogen concentration of activated sludge seperator water outlet is 8mg/L, COD mean concentration is 16mg, and water outlet meets the standard of " steel and iron industry water emission standard " (GB13456-2012) defined.
Embodiment described above only have expressed embodiments of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that, to those skilled in the art, without departing from the inventive concept of the premise, it is also possible to make some improvement, these improvement broadly fall into protection scope of the present invention.
Claims (1)
1. a steel industry nitrogenous effluent treatment method, including CMBR technology, it is characterised in that comprise the following steps:
(1) nitrogenous effluent is introduced reaction 0.5 ~ 16h in CMBR reaction tank by regulating reservoir, adds carbon source and potassium dihydrogen phosphate, make carbon in nitrogenous effluent, nitrogen, phosphorus mass ratio be 100:25-5:5-1, keep dissolved oxygen at 0.2-0.5mg/L；
(2) being introduced in sludge separator by reacted for step 1 mixed liquor, as required, by the mud after separating or enter sludge storage pool, or introduce CMBR reaction tank and continue reaction, clear liquid discharging stores to clear water reserviors, determines reuse amount and discharge capacity according to practical situation；
Described sludge separator is vibration-type membrane seperator, uses PVDF/PTFE organic membrane, membrane aperture 10-100nm, operating pressure 3-5bar, frequency of vibration 50HZ, Oscillation Amplitude 12-17mm；
Described carbon source is methanol.
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| CN104086048B true CN104086048B (en) | 2016-07-06 |
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Citations (6)
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| JP2006167549A (en) * | 2004-12-14 | 2006-06-29 | Kurita Water Ind Ltd | Apparatus and method for treating waste water containing nitrogen compound and inorganic ion |
| CN201276438Y (en) * | 2008-10-10 | 2009-07-22 | 樊利华 | Intelligent ultrasonic vibration membrane biological reaction sewage treatment and reclaimed water recycling apparatu |
| CN102139990A (en) * | 2011-01-21 | 2011-08-03 | 樊利华 | Ultrasonic combined waste water treatment process and system of refuse leachate |
| CN102276122A (en) * | 2011-07-27 | 2011-12-14 | 北京京诚科林环保科技有限公司 | Denitrification process of stainless steel cold rolling mixed acid wastewater |
| CN103708675A (en) * | 2013-12-13 | 2014-04-09 | 广东省环境科学研究院 | Landfill leachate treatment method based on high-frequency vibration membrane |
| CN103833174A (en) * | 2014-03-28 | 2014-06-04 | 文登市西郊热电有限公司 | Device and method for treating high-concentration ammonia nitrogen wastewater |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4679413B2 (en) * | 2006-03-31 | 2011-04-27 | 東洋エンジニアリング株式会社 | High temperature treatment method for hydrocarbon or oxygenated compound production plant wastewater |
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2014
- 2014-07-24 CN CN201410354961.2A patent/CN104086048B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006167549A (en) * | 2004-12-14 | 2006-06-29 | Kurita Water Ind Ltd | Apparatus and method for treating waste water containing nitrogen compound and inorganic ion |
| CN201276438Y (en) * | 2008-10-10 | 2009-07-22 | 樊利华 | Intelligent ultrasonic vibration membrane biological reaction sewage treatment and reclaimed water recycling apparatu |
| CN102139990A (en) * | 2011-01-21 | 2011-08-03 | 樊利华 | Ultrasonic combined waste water treatment process and system of refuse leachate |
| CN102276122A (en) * | 2011-07-27 | 2011-12-14 | 北京京诚科林环保科技有限公司 | Denitrification process of stainless steel cold rolling mixed acid wastewater |
| CN103708675A (en) * | 2013-12-13 | 2014-04-09 | 广东省环境科学研究院 | Landfill leachate treatment method based on high-frequency vibration membrane |
| CN103833174A (en) * | 2014-03-28 | 2014-06-04 | 文登市西郊热电有限公司 | Device and method for treating high-concentration ammonia nitrogen wastewater |
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