CN1472145A - Sewage containing high concentration organics and ammonia nitrogen disposal method - Google Patents

Sewage containing high concentration organics and ammonia nitrogen disposal method Download PDF

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Publication number
CN1472145A
CN1472145A CNA031290558A CN03129055A CN1472145A CN 1472145 A CN1472145 A CN 1472145A CN A031290558 A CNA031290558 A CN A031290558A CN 03129055 A CN03129055 A CN 03129055A CN 1472145 A CN1472145 A CN 1472145A
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sewage
nitrogen
water
anaerobic
treatment
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CNA031290558A
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Chinese (zh)
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CN1209301C (en
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张振家
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上海交通大学
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Abstract

A process for treating the sewage containing high-concentration organic substance and ammoniacal nitrogen includes such steps as stage-one anaerobic treating to transform the organic substance in sewage to marsh gas, stage-two anaerobic treating to transform the organic substance, ammonia-state nitrogen and nitric acid-state nitrogen to marsh gas and nitrogen respectively, aerobic treating to transform the organic substance and ammonia-state nitrogen to CO2, H2O and nitric acid-state nitrogen, depositing, and returning part of supernatant back to stage-two anaerobic treating unit.

Description

The treatment process that contains high-enriched organics and high concentration ammonia nitrogen sewage
Technical field:
The present invention relates to a kind of sewage water treatment method, relate in particular to a kind of treatment process that contains high-enriched organics and high concentration ammonia nitrogen sewage, belong to technical field of sewage.
Background technology:
All produce the sewage that contains high-enriched organics and ammonia nitrogen in high density simultaneously in many industrial production, as alcohol, wine brewing, food and drink processing or the like.These sewage are the very large source of pollution of pollution level, are 1.5 ten thousand tons enterprise for producing the alcohol amount per year, and the sewage that is discharged just is equivalent to the contamination level of one 300,000 population sanitary sewage.
Existing method is handled this class sewage and is adopted " anaerobism+anoxic/aerobic combined treatment process " (A+A/O treatment process), it is characterized in that earlier with waste water process anaerobic biological treatment cell processing, purpose is removed about organism of about 80% in the waste water by producing biogas, make that organic concentration is reduced in the sewage; And not removed residual organic substances and ammonia nitrogen are removed by follow-up anoxic/aerobic treatment unit again.
Facts have proved that there is following shortcoming in existing A+A/O treatment process:
(1) owing to contains the organism and the ammonia-state nitrogen of higher concentration in the anaerobic treatment cell processing, so the denitrification effect of follow-up A/O processing unit is relatively poor, long reaction time, power consumption height.
(2) because water outlet fluctuation of concentration in anaerobic treatment unit is bigger, so the treatment effect instability of total system.Perhaps, then must increase the volume of anaerobic processing device, thereby cause the construction of entire treatment facility and working cost to raise in order to improve the Treatment Stability of total system.
Summary of the invention:
The objective of the invention is at the deficiencies in the prior art, propose a kind of novel treatment process that contains high-enriched organics and high concentration ammonia nitrogen sewage, can not only improve the stability and the efficient of sewage disposal, and maintenance management is easy.
For realizing such purpose, sewage water treatment method provided by the invention, the tertiary treatment mode that adopts an anaerobe reaction of two steps and a step aerobic reaction to be in series, the anaerobe reactive system adopts two isometric anaerobic treatment units in series to constitute, first step anaerobic treatment unit is converted into biogas with the organism in the sewage, anaerobic treatment unit, the second stage is separately converted to biogas and nitrogen with the organism in the sewage and ammonia-state nitrogen and nitric nitrogen simultaneously, and the aerobic treatment unit is separately converted to CO with organism in the sewage and ammonia-state nitrogen simultaneously 2, H 2O and nitric nitrogen.Sewage enters the precipitation clarification unit that is provided with after the aerobic treatment unit after tertiary treatment, so that its water outlet obtains clarification, the water outlet of getting after the part clarification turns back to anaerobic treatment unit, the second stage as recirculation water, remainingly is discharged as treating water.
The water temperature of sewage in the two-stage anaerobic processing unit is set at 53-57 ℃ or 33-37 ℃ respectively; The organic concentration that flows in the first step and the unitary water of second stage anaerobic treatment is set at 2000-30000mg/LCODcr and 300-6000mg/LCODcr respectively, and hydraulic detention time is set at 20-40 hour respectively and 10-20 hour; Needed dissolved oxygen is supplied with by trailing plants thatch blower fan in the aerobic treatment unit water, the concentration of dissolved oxygen is set at 4-6mg/L, the organic concentration and the ammonia nitrogen concentration that flow in the aerobic treatment unit water are set at 100-500mg/LCODcr and 30-100mg/L respectively, hydraulic detention time is set at 5-20 hour, and the flow of recirculation water and the flow proportional of handled sewage are 1-2: 1.
Sewage flows into first step anaerobic treatment unit and the anaerobic treatment unit, the second stage that has adopted upflow anaerobic sludge blanket process (UASB) or anaerobic expanded granular sludge bed (EGSB) technological design successively by water pump from the bottom, sewage from bottom to top is piston stream mode and flows in anaerobic mud bed, in process of flowing, pollutants in sewage is by the degradation of anaerobic bacteria in the granule sludge, and produce biogas and nitrogen, not removed residual contamination thing is along with anaerobic treatment unitary water outlet in the second stage flows into the aerobic treatment unit, effect by aerobic bacteria continues to be removed, after the aerobic treatment unit, be provided with a precipitation clarification unit, so that its water outlet obtains clarification, needed dissolved oxygen is supplied with by trailing plants thatch blower fan in the aerobic treatment unit water, some turns back to anaerobic treatment unit, the second stage as recirculation water the unitary water outlet of aerobic treatment, remainingly is discharged as treating water.
The device and method that anaerobic treatment of the present invention unit is adopted is seen the patent of invention ZL97103589.5 (on May 16th, 2000 authorized, certificate number 58997) of Zhang Zhenjia; The device and method that the aerobic treatment unit is adopted is seen " sewage aerobic microbial film treatment unit " (Chinese invention patent application number: 021577803).
System for anaerobic treatment of the present invention adopts two isometric anaerobic processing device series connection to constitute, cubic capacity has only existing single-stage system for anaerobic treatment volumetrical 50%-60%, and organic clearance can improve 10-20 percentage point, the biogas generation improves 10-20 percentage point, and overcome existing single-stage system for anaerobic treatment when influent concentration and water yield generation fluctuation, organic clearance fluctuation is big, follow-up aerobic treatment effect instability, the problem for the treatment of water poor stability up to standard.
The present invention has constituted a system of removing nitrogen in the sewage by anaerobic treatment unit, the second stage and aerobic treatment unit, can form two functional zone respectively on the bottom and the top of secondary anaerobic treatment unit: denitrification functions district and product biogas functional zone.Its principle is to utilize the organism that contained in the water outlet of one-level anaerobism and the nitric nitrogen in ammonia-state nitrogen and the aerobic treatment unit recirculation water, in device denitrification functions district, bottom, carry out denitrification denitrogenation and ammonia oxidation denitrification reaction, the ammonia-state nitrogen in the sewage and the concentration of nitric nitrogen are reduced simultaneously, thereby reduce the ammonia nitrogen concentration in the water inlet of aerobic treatment unit effectively, unitary reaction times of aerobic treatment and energy expenditure are reduced; Simultaneously, the organism that does not run out of in above-mentioned denitrogenation engineering can be in the current uphill process produces on the top of device that the metabolism by methanobacteria is converted into biogas in the biogas functional zone, and organism is further removed.
Different with existing A/O method denitrification process, aerobic treatment of the present invention unit is mainly and carries out nitration reaction, makes the concentration of ammonia-state nitrogen reach emission standard.Enter and contain pollutent in the unitary water of aerobic treatment and be mainly not removed ammonia-state nitrogen in the denitrification process, organism is removed at system for anaerobic treatment substantially, therefore, organism does not almost have for the influence of ammonia-state nitrogen nitration reaction in the aerobic treatment unit, thereby has improved the efficient of nitration reaction.
Aerobic microbiological is to form biomembranous mode attached to the carrier filler surface that is placed in advance in the treatment unit in the aerobic treatment unit, aerobic microbiological does not flow out with current, the nitrifier of rising in value slowly can keep in treatment unit in a large number, provides the foundation for improving nitrification efficiency.
Different with existing A/O method denitrification process, there is not the backflow that unitary mud backflow of precipitation clarification and aerobic processing unit contain the mixed liquid of aerobic microbiological solid in the denitrification process that anaerobic treatment unit, the second stage of the present invention and aerobic treatment unit are constituted, reflux and just will carry out the part clear water, do not have aerobic microbiological in the recirculation water through the clarifying water outlet of precipitation.
Enforcement by the inventive method, can make that the organism more than 90% is converted into biogas in the sewage, the content of methane can reach 65%-70% in the biogas, organic concentration can drop to below the 100mg/LCODcr in the treating water, the concentration of ammonia-state nitrogen can drop to below the 15mg/L, makes the water quality after the processing reach " People's Republic of China's integrated wastewater discharge standard " (GB8978-1996) primary standard of defined.
Description of drawings:
Fig. 1 is a process flow sheet of the present invention.
Among the figure, 1, sewage, 2, anaerobic treatment unit A, 3, biogas, 4, the anaerobic treatment unit B, 5, biogas and nitrogen, 6, the aerobic treatment unit, 7, primary water refluxes, 8, precipitation clarification unit, 9, treating water, 10, mud discharges
Embodiment:
Below in conjunction with drawings and Examples technical scheme of the present invention is further described.
The method flow that the embodiment of the invention adopts as shown in Figure 1, mainly comprise the first step anaerobic treatment that the organism in the sewage is converted into biogas, simultaneously the organism in the sewage and ammonia-state nitrogen and nitric nitrogen are separately converted to the second stage anaerobic treatment of biogas and nitrogen, and simultaneously organism in the sewage and ammonia-state nitrogen are separately converted to CO 2, H 2The aerobic treatment of O and nitric nitrogen.Treatment unit is respectively by anaerobic treatment unit A[2], anaerobic treatment unit B [4], aerobic treatment unit [6], precipitation clarification unit [8] constitute.
Embodiment 1:
Method of the present invention is used to handle the mixed sewage that rice and soybean cooking process are discharged of washing of certain rice raw material distillery, and the discharge of sewage is 350m 3/ d, the technical process of employing as shown in Figure 1.Earlier sewage is sent into anaerobic treatment unit A[2] handle, organic concentration is 5000mg/LCODcr in the water inlet, total nitrogen concentration is 500mg/L, hydraulic detention time is 20 hours, water temperature in the anaerobic device is 33-37 ℃, organic clearance is 80%, handles every cubic metre of sewage and obtains biogas 2.0Nm 3Anaerobic treatment unit A[2] water outlet and recirculation water [7] send into anaerobic treatment unit B [4] again after mixed and handle, hydraulic detention time is 10 hours, organic clearance is 70%, handles every cubic metre of sewage and obtains biogas 0.5Nm 3The water outlet of anaerobic treatment unit B [4] is sent into aerobic treatment unit [6] again and is handled, organic concentration is 100-120mg/LCODcr in the water inlet, ammonia nitrogen concentration is 30-40mg/L, hydraulic detention time is 10 hours, needed dissolved oxygen is supplied with by trailing plants thatch blower fan, the concentration of dissolved oxygen is 4-6mg/L, and organic clearance is 50%, and the clearance of ammonia-state nitrogen is 80%; Precipitation clarification unit [8] is sent in the water outlet of aerobic treatment single [6] unit, and the organic concentration of its water outlet is 40-60mg/LCODcr, and ammonia nitrogen concentration is 6-8mg/L, and a part turns back to anaerobic treatment unit B [4] as recirculation water [8], and the flow of recirculation water is 350m 3/ d, remainder water is as treating water [9] qualified discharge.The discharging mud [10] that is produced in the precipitation clarification unit [8] is a kind of solid residue that is made of microorganism cells, and it contains abundant nitrogen, phosphoric, can be used as fertilizer and is used.
Embodiment 2:
Method of the present invention is used to handle the sewage that the alcohol distillation tower of certain maize raw material grain distillery is discharged, and the discharge of sewage is 700-800m 3/ d, the technical process of employing as shown in Figure 1.To send into anaerobic treatment unit A[2 through the sewage of having removed suspended solids earlier] handle, organic concentration is 25000-30000mg/LCODcr in the water inlet, total nitrogen concentration is 1500mg/L, hydraulic detention time is 30 hours, water temperature in the device is 53-57 ℃, organic clearance is 90%, handles every cubic metre of sewage and obtains biogas 13.5Nm 3Anaerobic treatment unit A[2] water outlet and recirculation water [7] send into anaerobic treatment unit B [4] again after mixed and handle, hydraulic detention time is 15 hours, water temperature in the device is 33-37 ℃, and organic clearance is 70%, handles every cubic metre of sewage and obtains biogas 2.0Nm 3The water outlet of anaerobic treatment unit B [4] is sent into aerobic treatment unit [6] again and is handled, organic concentration is 400-500mg/LCODcr in the water inlet, ammonia nitrogen concentration is 50-60mg/L, hydraulic detention time is 15 hours, needed dissolved oxygen is supplied with by trailing plants thatch blower fan, the concentration of dissolved oxygen is 4-6mg/L, and organic clearance is 80-85%, and the clearance of ammonia-state nitrogen is 85%; Precipitation clarification unit [8] is sent in the water outlet of aerobic treatment single [6] unit, and the organic concentration of its water outlet is 80-90mg/LCODcr, and ammonia nitrogen concentration is 10-13mg/L, and a part turns back to anaerobic treatment unit B [4] as recirculation water [8], and the flow of recirculation water is 800m 3/ d, remainder water is as treating water [9] qualified discharge.The discharging mud [10] that is produced in the precipitation clarification unit [8] is a kind of solid residue that is made of microorganism cells, and it contains abundant nitrogen, phosphoric, can be used as fertilizer and is used.

Claims (1)

1, a kind of treatment process that contains high-enriched organics and high concentration ammonia nitrogen sewage, it is characterized in that adopting two steps anaerobe reaction and to go on foot the tertiary treatment mode that aerobic reaction is in series, the anaerobe reactive system adopts two isometric anaerobic treatment units in series to constitute, first step anaerobic treatment unit is converted into biogas with the organism in the sewage, the second stage then is separately converted to biogas and nitrogen with the organism in the sewage and ammonia-state nitrogen and nitric nitrogen, and the aerobic treatment unit is separately converted to CO with organism in the sewage and ammonia-state nitrogen 2, H 2O and nitric nitrogen, sewage enters precipitation clarification unit after tertiary treatment, the water outlet of getting after a part is clarified turns back to anaerobic treatment unit, the second stage as recirculation water, remainingly be discharged as treating water, the water temperature of sewage in the two-stage anaerobic processing unit is set at 53-57 ℃ or 33-37 ℃ respectively, hydraulic detention time is set at 20-40 hour respectively and 10-20 hour, the concentration of needed dissolved oxygen is set at 4-6mg/L in the aerobic treatment unit water, the unitary hydraulic detention time of aerobic treatment is set at 5-20 hour, and the flow of recirculation water and the flow proportional of handled sewage are 1-2: 1.
CN 03129055 2003-06-05 2003-06-05 Sewage containing high concentration organics and ammonia nitrogen disposal method CN1209301C (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100336744C (en) * 2005-09-14 2007-09-12 哈尔滨工业大学 Water influent allocation optimization method in segmental influent and biological denitrification process
CN102068890A (en) * 2010-12-24 2011-05-25 环境保护部华南环境科学研究所 Method and device for treating complex industrial organic waste gas
CN102583744A (en) * 2012-03-07 2012-07-18 青岛大学 Biological treatment method of aquatic product processing wastewater
CN105174621A (en) * 2015-09-16 2015-12-23 杭州鼎隆环保科技有限公司 System and method for treating wastewater by applying activated sludge
CN105174622A (en) * 2015-09-16 2015-12-23 杭州鼎隆环保科技有限公司 System and method suitable for treating high concentration organic wastewater
CN109912024A (en) * 2019-02-18 2019-06-21 河南景美环保工程有限公司 A kind of organic sewage treatment process

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100336744C (en) * 2005-09-14 2007-09-12 哈尔滨工业大学 Water influent allocation optimization method in segmental influent and biological denitrification process
CN102068890A (en) * 2010-12-24 2011-05-25 环境保护部华南环境科学研究所 Method and device for treating complex industrial organic waste gas
CN102068890B (en) * 2010-12-24 2013-04-03 环境保护部华南环境科学研究所 Method and device for treating complex industrial organic waste gas
CN102583744A (en) * 2012-03-07 2012-07-18 青岛大学 Biological treatment method of aquatic product processing wastewater
CN105174621A (en) * 2015-09-16 2015-12-23 杭州鼎隆环保科技有限公司 System and method for treating wastewater by applying activated sludge
CN105174622A (en) * 2015-09-16 2015-12-23 杭州鼎隆环保科技有限公司 System and method suitable for treating high concentration organic wastewater
CN109912024A (en) * 2019-02-18 2019-06-21 河南景美环保工程有限公司 A kind of organic sewage treatment process

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