CN102583747B - A kind of high ammonia nitrogen leather-making waste water biochemical denitrification treatment unit and technique - Google Patents
A kind of high ammonia nitrogen leather-making waste water biochemical denitrification treatment unit and technique Download PDFInfo
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Abstract
The present invention relates to industrial waste water treatment, the high ammonia nitrogen leather-making waste water biochemical denitrification treatment unit providing a kind of high efficiency synchronous to remove COD, ammonia nitrogen and total nitrogen in leather-making waste water and technique.A kind of high ammonia nitrogen leather-making waste water biochemical denitrification treatment unit mainly comprises physico-chemical pretreatment unit, biochemical pretreatment unit, balancing tank, multi-stage anaerobic/aerobic treatment unit and mud-water separation unit, and its treatment process relates generally to anoxic biological treatment and Aerobic biological process alternates mutually, the Tannery Wastewater Treatment Technology of plural serial stage operation.
Description
Technical field
The present invention relates to industrial waste water treatment, be specifically related to a kind of high ammonia nitrogen leather-making waste water biochemical denitrification treatment unit and technique.
Background technology
Leather-making industrial wastewater has that water quality and quantity fluctuation is large, organic pollutant and concentration of suspension is high, containing features such as a large amount of sulfide and heavy metal chromiums, intractability is large, how to carry out to it difficult problem that effective improvement is water treatment field always.For the process of leather-making waste water, all adopt the technological line that physico-chemical pretreatment is combined with biochemical treatment at present, that is: collect from the chromate waste water of process hides production technique, sulfur-containing waste water and other waste water (comprehensive wastewater) respectively and carry out physico-chemical pretreatment, to remove the biochemical material of the impacts such as chromium, sulfide, SS, scum silica frost and grease wherein; Chromate waste water, sulfur-containing waste water and comprehensive wastewater enter biochemical treatment system and do further process after physico-chemical pretreatment mixing.
Through the composite waste that materializing strategy is formed, its COD content is higher, and generally all at more than 1500mg/L, higher COD concentration will have a strong impact on ammonium oxidation and the denitrification effect of subsequent biochemical treatment process.In order to ensure the removal effect of ammonia nitrogen and total nitrogen, need the COD concentration reduced further in waste water, generally this biochemical treatment being main purpose with COD removal is referred to as one-level biochemical treatment or biochemical pre-treatment, adoptable method comprises upflow anaerobic sludge blanket process (UASB), anaerobic filter, acidication, catalytic oxidation and high CO_2 density etc., these methods are removing the effect in COD better, and water outlet COD can be reduced to below 1000mg/L mostly.Wherein, catalytic oxidation and high CO_2 density efficiency higher, its effluent COD concentration can be reduced to below 500mg/L.
Through physico-chemical pretreatment and biochemical pre-treatment, the COD concentration in organic waste water significantly reduces, and appropriate means now can be adopted to carry out secondary biochemical treatment to it, reaches the object removing COD and denitrogenation further.Adoptable processing method mainly comprises intermittent activated sludge process (SBR), oxidation ditch, CASS(mono-kind change SBR technique), A/O technique and contact oxidation method etc., these methods are not desirable especially in denitrification effect, operability and economy, process water outlet ammonia nitrogen concentration major part, at more than 80mg/L, cannot reach leather-making industrial wastewater ammonia nitrogen emission standard.
Multistage A/O technique is the denitride technology for sanitary sewage disposal that 20 century 70s grow up, mainly theoretical based on Microbial denitrogenation and unstable state is theoretical, by to anoxic with aerobic replace the coupling realizing nitrification and denitrification continuously, microorganism is enable to obtain rationally the nitrogenous source in sewage and carbon source and utilize fully.As the carbon source of microorganism, COD in sewage successively decreases along journey in multistage A/O system, for meeting the demand to carbon source and the energy of different microorganisms in system, by water inlet is assigned to the method for A/O reaction member at different levels by a certain percentage with the organic loading of equilibrium reaction member at different levels.Reasonably regulate water inlet to suffer water impact than all right relieving system, ensure the stable of effluent quality.Multistage A/O technique has the features such as operational management is simple, flexible operation, anti impulsion load, processing cost are low, denitrification effect is good, and it is more in field of municipal sewage treatment application, and there is not yet report in the application in tannery wastewater treatment field.
The multistage A/O technique being used for town domestic sewage process is mainly introduced tannery wastewater treatment domain variability and is reformed it by the present invention, the object removed with the high efficiency synchronous reaching COD in leather-making waste water, ammonia nitrogen and total nitrogen.
Summary of the invention
Therefore, for the problems referred to above, the invention provides high ammonia nitrogen leather-making waste water biochemical denitrification treatment unit and technique that a kind of high efficiency synchronous removes COD, ammonia nitrogen and total nitrogen in leather-making waste water.
For achieving the above object, the present invention is achieved by the following technical solutions: a kind of high ammonia nitrogen leather-making waste water biochemical denitrification treatment unit, comprise physico-chemical pretreatment unit, biochemical pretreatment unit, it is characterized in that: also comprise multi-stage anaerobic/aerobic treatment unit and mud-water separation unit, described multi-stage anaerobic/aerobic treatment unit is in series by organizing Anoxic/Aerobic reaction member more, described Anoxic/Aerobic reaction member is composed in series by a hypoxia response district and an aerobic reactor zone, described aerobic reactor zone at different levels is provided with aerating apparatus, described physico-chemical pretreatment unit delivery port is connected with biochemical pretreatment unit input aperture, described biochemical pretreatment unit delivery port is connected with the first step input aperture of multi-stage anaerobic/aerobic treatment unit, the last step delivery port of multi-stage anaerobic/aerobic treatment unit is connected with the input aperture of mud-water separation unit, sump pump is provided with between biochemical pretreatment unit and each hypoxia response district of multi-stage anaerobic/aerobic treatment unit, the bottom of described mud-water separation unit and the first step hypoxia response interval of multi-stage anaerobic/aerobic treatment unit are provided with sludge pump.
Further improvement is: be provided with a balancing tank between described biochemical pretreatment unit and multi-stage anaerobic/aerobic treatment unit, input aperture, described balancing tank is connected with biochemical pretreatment unit delivery port, and described balancing tank delivery port is connected with the input aperture in the first step hypoxia response district of multi-stage anaerobic/aerobic treatment unit.
Further improvement is: the aerating apparatus of described aerobic reactor zone at different levels is made up of pneumatic pump, air flowmeter, multiple valve, and each valve described is located at bottom each aerobic zone, and described pneumatic pump is connected with air flowmeter and is located at below each valve.
Further improvement is: be provided with a stirrer in described each hypoxia response district.
Further improvement is: described mud-water separation unit is provided with an effluent weir and a sludge bucket.
A kind of high ammonia nitrogen leather-making waste water biochemical processing process, comprises the steps:
(1) biochemical pretreatment unit is entered by being mixed to form composite waste after carrying out physico-chemical pretreatment respectively from the sulfur-containing waste water of process hides production technique, chromate waste water and comprehensive wastewater;
(2) high CO_2 density is adopted to carry out biochemical pre-treatment the waste water of above-mentioned biochemical pretreatment unit;
(3) waste water pretreated for biochemistry is entered in proportion respectively the hypoxia response districts at different levels of multi-stage anaerobic/aerobic treatment unit, carry out ammonia, nitrogen and organic matter removal in hypoxia response district at different levels and aerobic reactor zone;
(4) waste water that step (3) processed is entered mud-water separation unit, primary water is discharged by the effluent weir of periphery, a precipitating sludge part is back to the first step hypoxia response district of multi-stage anaerobic/aerobic treatment unit by sludge pump, remainder is discharged through sludge bucket.
Further improvement is: enrichment culture organic matter degradation bacteria, ammonia oxidizing bacteria, nitrite bacteria, nitrobacteria and denitrifying bacterium in the multi-stage anaerobic/aerobic treatment unit in described step (3).
Further improvement is: described multi-stage anaerobic/aerobic treatment unit is three grades of anoxic/aerobic treatment unit, and the volumetric ratio of described hypoxia response district and aerobic reactor zone is 1:2 ~ 1:3; The waste water of described biochemical treatment from the first step to the flooding velocity ratio in third stage hypoxia response district be 3:2:1; The total hydraulic detention time (HRT) of described three grades of anoxic/aerobic treatment unit is 24 ~ 36 hours; The temperature of described three grades of anoxic/aerobic treatment unit controls at 15 ~ 30 DEG C, the Dissolved Oxygen concentration Control of aerobic reactor zone is at 2 ~ 3mg/L, and the mean sludge rate of load condensates at different levels of three grades of anoxic/aerobic treatment unit remain on 0.15 ~ 0.25kgCOD/(kgMLVSSd).
Further improvement is: described multi-stage anaerobic/aerobic treatment unit is level Four anoxic/aerobic treatment unit, and the volumetric ratio of described hypoxia response district and aerobic reactor zone is 1:2 ~ 1:3; The waste water of described biochemical treatment from the first step to the flooding velocity ratio in fourth stage hypoxia response district be 4:3:2:1; The total hydraulic detention time (HRT) of described level Four anoxic/aerobic treatment unit is 24 ~ 36 hours; The temperature of described level Four anoxic/aerobic treatment unit controls at 15 ~ 30 DEG C, the Dissolved Oxygen concentration Control of aerobic reactor zone is at 2 ~ 3mg/L, and the mean sludge rate of load condensates at different levels of level Four anoxic/aerobic treatment unit remain on 0.15 ~ 0.25kgCOD/(kgMLVSSd).
Further improvement is: the mud being back to multi-stage anaerobic/aerobic treatment unit in described step (5), its control of reflux ratio is 50% ~ 100%.
By adopting preceding solution, the invention has the beneficial effects as follows: the technological thought of the multistage A/O technique for the treatment of town domestic sewage is incorporated into tannery wastewater treatment field by the present invention, create a kind of brand-new leather-making waste water treatment method, solve the ammonia nitrogen that exists in tannery wastewater treatment and total nitrogen process is difficult to problem up to standard.Theoretical according to unstable state, the alternately change of anaerobic environment and aerobic environment significantly can excite and strengthen the activity of nitrification and denitrification bacterium, and therefore to have nitric efficiency high for multistage A/O system, and treatment operating costs is low, operation scheme is controlled flexibly, the advantages such as sludge bulking can not occur.It achieves short-cut nitrification and denitrification in denitrification process and synchronous nitration and denitrification, significantly can promote nitric efficiency, saves carbon source and also reduces energy consumption.Due to the structure of its segmental influent, make the organic loading of system and ammonia nitrogen loading be tending towards homogeneous, be conducive to the enrichment and growth of nitrifier and denitrifying bacteria, thus improve its nitric efficiency.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention one;
Fig. 2 is the structural representation of the embodiment of the present invention two.
Embodiment
Describe embodiments of the present invention in detail below with reference to specific embodiment, to the present invention, how utilisation technology means solve technical problem whereby, and the implementation procedure reaching technique effect can fully understand and implement according to this.
Embodiment one
With reference to figure 1, one of the present invention high ammonia nitrogen leather-making waste water biochemical denitrification treatment unit, comprise physico-chemical pretreatment unit 1, biochemical pretreatment unit 2, balancing tank 3, three grades of anoxic/aerobic treatment unit 4 and mud-water separation unit 5, described three grades of anoxic/aerobic treatment unit 4 are in series by three groups of Anoxic/Aerobic reaction members, described reaction member is composed in series by a hypoxia response district and an aerobic reactor zone, a dividing plate 41 is provided with in described hypoxia response district at different levels and aerobic reactor zone, dividing plate makes hypoxia response district and top, aerobic reactor zone separate, bottom communicates, a dividing plate 42 is provided with in aerobic reactor zone at different levels and hypoxia response district, dividing plate makes aerobic reactor zone be communicated with top, hypoxia response district, bottom separates, a stirrer 43 is provided with in described hypoxia response district, described aerobic reactor zone at different levels is provided with aerating apparatus, described aerating apparatus is made up of pneumatic pump 10, air flowmeter 11, valve 9, described valve 9 is located at bottom each aerobic zone, and described pneumatic pump 10 is located at below valve 9, and described air flowmeter 11 is located between valve 9 and pneumatic pump 10.Described physico-chemical pretreatment unit delivery port is connected with biochemical pretreatment unit input aperture, described biochemical pretreatment unit delivery port is connected with input aperture, balancing tank, described balancing tank delivery port is connected with the first step input aperture of three grades of anoxic/aerobic treatment unit, the last step delivery port of three grades of anoxic/aerobic treatment unit is connected with the input aperture of mud-water separation unit, a valve 6 is provided with between the delivery port of three grades of anoxic/aerobic treatment unit 4 third stage aerobic zones and the input aperture of mud-water separation unit, sump pump 7 is provided with between each hypoxia response district of balancing tank 3 and three grades of anoxic/aerobic treatment unit 4, the bottom of described mud-water separation unit 5 and the first step hypoxia response interval of three grades of anoxic/aerobic treatment unit 4 are provided with sludge pump 8, for the first step hypoxia response district of mud to the three grade anoxic/aerobic treatment unit 4 of the mud-water separation unit 5 that refluxes with the sludge quantity in keeping system.
In conjunction with one of the present invention high ammonia nitrogen leather-making waste water biochemical denitrification technique, comprise the steps:
(1) biochemical pretreatment unit is entered by being mixed to form composite waste after carrying out physico-chemical pretreatment respectively from the sulfur-containing waste water of process hides production technique, chromate waste water and comprehensive wastewater;
(2) waste water of above-mentioned biochemical pretreatment unit is carried out biochemical treatment, biochemical pre-treatment adopts high CO_2 density;
(3) enrichment culture organic matter degradation bacteria, ammonia oxidizing bacteria, nitrite bacteria, nitrobacteria and denitrifying bacterium in three grades of anoxic/aerobic treatment unit;
(4) flooding velocity of the waste water of biochemical treatment is entered respectively the hypoxia response district of the first step to the third stage of three grades of anoxic/aerobic treatment unit in the ratio of 3:2:1, waste water carries out ammonification, denitrification and organic matter removal in hypoxia response district, carries out nitrosification and nitrification and organic matter removal in aerobic reactor zone; The total hydraulic detention time (HRT) of described three grades of anoxic/aerobic treatment unit is 30 hours; The temperature of described three grades of anoxic/aerobic treatment unit controls at 28 DEG C, and the Dissolved Oxygen concentration Control of aerobic reactor zone is at 2.5mg/L, and the mean sludge rate of load condensates at different levels of three grades of anoxic/aerobic treatment unit remain on 0.20kgCOD/(kgMLVSSd);
(5) waste water that step (4) processed is entered sludge-water separating system, sludge settling is to bottom, primary water is discharged by the effluent weir of periphery, and the amount of precipitating sludge 75% is back to the first step hypoxia response district of three grades of anoxic/aerobic treatment unit by sludge pump, remainder is discharged through sludge bucket.
The total hydraulic detention time (HRT) of described step (4) multi-stage anaerobic/aerobic treatment unit is 24 ~ 36 hours; The temperature of described multi-stage anaerobic/aerobic treatment unit controls at 15 ~ 30 DEG C, the Dissolved Oxygen concentration Control of aerobic reactor zone is at 2 ~ 3mg/L, and the mean sludge rate of load condensates at different levels of multi-stage anaerobic/aerobic treatment unit remain on 0.15 ~ 0.25kgCOD/(kgMLVSSd); The mud being back to multi-stage anaerobic/aerobic treatment unit in described step (5), its control of reflux ratio all can 50% ~ 100%.
The scope of the reflux ratio described in each concrete steps, hydraulic detention time, temperature, dissolved oxygen, mud load rate is actually the feasible and desirable scope of restriction one above, uses the arbitrary numerical value in each span can realize the object of inventing.
Embodiment two
With reference to figure 2, one of the present invention high ammonia nitrogen leather-making waste water biochemical denitrification treatment unit, comprise physico-chemical pretreatment unit 1 ', biochemical pretreatment unit 2 ', balancing tank 3 ', level Four anoxic/aerobic treatment unit 4 ' and mud-water separation unit 5 ', described level Four anoxic/aerobic treatment unit 4 ' is in series by four groups of Anoxic/Aerobic reaction members, described reaction member is composed in series by a hypoxia response district and an aerobic reactor zone, a dividing plate 41 ' is provided with in described hypoxia response district at different levels and aerobic reactor zone, dividing plate makes hypoxia response district and top, aerobic reactor zone separate, bottom communicates, a dividing plate 42 ' is provided with in aerobic reactor zone at different levels and hypoxia response district, dividing plate makes aerobic reactor zone be communicated with top, hypoxia response district, bottom separates, a stirrer 43 ' is provided with in described hypoxia response district, described aerobic reactor zone at different levels is provided with aerating apparatus, described aerating apparatus is made up of pneumatic pump 10 ', air flowmeter 11 ', valve 9 ', described valve 9 ' is located at bottom each aerobic zone, valve 9 ' below is located at by described pneumatic pump 10 ', and described air flowmeter 11 ' is located between valve 9 ' and pneumatic pump 10 '.Described physico-chemical pretreatment unit delivery port is connected with biochemical pretreatment unit input aperture, described biochemical pretreatment unit delivery port is connected with input aperture, balancing tank, described balancing tank delivery port is connected with the first step input aperture of multi-stage anaerobic/aerobic treatment unit, the last step delivery port of three grades of anoxic/aerobic treatment unit is connected with the input aperture of mud-water separation unit, a valve 6 ' is provided with between the delivery port of level Four anoxic/aerobic treatment unit 4 ' fourth stage aerobic zone and the input aperture of mud-water separation unit, sump pump 7 ' is provided with between each hypoxia response district of balancing tank 3 ' and level Four anoxic/aerobic treatment unit 4 ', the bottom of described mud-water separation unit 5 ' and the first step hypoxia response interval of multi-stage anaerobic/aerobic treatment unit 4 ' are provided with sludge pump 8 ', for the mud of the mud-water separation unit 5 ' that refluxes to the first step hypoxia response district of level Four anoxic/aerobic treatment unit 4 ' with the sludge quantity in keeping system.
In conjunction with one of the present invention high ammonia nitrogen leather-making waste water biochemical denitrification technique, comprise the steps:
(1) biochemical pretreatment unit is entered by being mixed to form composite waste after carrying out physico-chemical pretreatment respectively from the sulfur-containing waste water of process hides production technique, chromate waste water and comprehensive wastewater;
(2) waste water of above-mentioned biochemical pretreatment unit is carried out biochemical treatment, biochemical pre-treatment adopts high CO_2 density;
(3) enrichment culture organic matter degradation bacteria, ammonia oxidizing bacteria, nitrite bacteria, nitrobacteria and denitrifying bacterium in level Four anoxic/aerobic treatment unit;
(4) flooding velocity of the waste water of biochemical treatment is entered respectively the hypoxia response district of the first step to the fourth stage of level Four anoxic/aerobic treatment unit in the ratio of 4:3:2:1, waste water carries out ammonification, denitrification and organic matter removal in hypoxia response district, carries out nitrosification and nitrification and organic matter removal in aerobic reactor zone; The total hydraulic detention time (HRT) of described level Four anoxic/aerobic treatment unit is 30 hours; The temperature of described level Four anoxic/aerobic treatment unit controls at 28 DEG C, and the Dissolved Oxygen concentration Control of aerobic reactor zone is at 2.5mg/L, and the mean sludge rate of load condensates at different levels of level Four anoxic/aerobic treatment unit remain on 0.20kgCOD/(kgMLVSSd);
(5) waste water that step (4) processed is entered sludge-water separating system, sludge settling is to bottom, primary water is discharged by the effluent weir of periphery, and the amount of precipitating sludge 75% is back to the first step hypoxia response district of level Four anoxic/aerobic treatment unit by sludge pump, remainder is discharged through sludge bucket.
The total hydraulic detention time (HRT) of described step (4) level Four anoxic/aerobic treatment unit is 24 ~ 36 hours; The temperature of described level Four anoxic/aerobic treatment unit controls at 15 ~ 30 DEG C, the Dissolved Oxygen concentration Control of aerobic reactor zone is at 2 ~ 3mg/L, and the mean sludge rate of load condensates at different levels of level Four anoxic/aerobic treatment unit remain on 0.15 ~ 0.25kgCOD/(kgMLVSSd); The mud being back to level Four anoxic/aerobic treatment unit in described step (5), its control of reflux ratio all can 50% ~ 100%.
The scope of the reflux ratio described in each concrete steps, hydraulic detention time, temperature, dissolved oxygen, mud load rate is actually the feasible and desirable scope of restriction one above, uses the arbitrary numerical value in each span can realize the object of inventing.
The accessible nitric efficiency of other treatment processs of the prior art is up to 80%, when the progression of the multi-stage anaerobic that the present invention relates to/aerobic reaction unit is three grades, its nitric efficiency can reach 90%, can 95% be reached when progression is level Four, when progression is higher, its denitrification effect is better, but cost is more expensive.Therefore, level Four is best stage number selection.
The technological thought of the multistage A/O technique for the treatment of town domestic sewage is incorporated into tannery wastewater treatment field by the present invention, create a kind of brand-new leather-making waste water treatment method, solve the ammonia nitrogen that exists in tannery wastewater treatment and total nitrogen process is difficult to problem up to standard.Theoretical according to unstable state, the alternately change of anaerobic environment and aerobic environment significantly can excite and strengthen the activity of nitrification and denitrification bacterium, and therefore to have nitric efficiency high for multistage A/O system, and treatment operating costs is low, operation scheme is controlled flexibly, the advantages such as sludge bulking can not occur.It achieves short-cut nitrification and denitrification in denitrification process and synchronous nitration and denitrification, significantly can promote nitric efficiency, saves carbon source and also reduces energy consumption.Due to the structure of its segmental influent, make the organic loading of system and ammonia nitrogen loading be tending towards homogeneous, be conducive to the enrichment and growth of nitrifier and denitrifying bacteria, thus improve its nitric efficiency.
Above, be only the embodiment utilizing this origination techniques content, the modification that any those skilled in the art use this creation to do, change, all belong to the scope of the claims that this creation is advocated, and be not limited to those disclosed embodiments.
Claims (3)
1. a high ammonia nitrogen leather-making waste water biochemical denitrification treatment process, is characterized in that, comprise the steps:
(1) biochemical pretreatment unit is entered by being mixed to form composite waste after carrying out physico-chemical pretreatment respectively from the sulfur-containing waste water of process hides production technique, chromate waste water and comprehensive wastewater;
(2) high CO_2 density is adopted to carry out biochemical pre-treatment the waste water of above-mentioned biochemical pretreatment unit;
(3) waste water pretreated for biochemistry is entered in proportion respectively the hypoxia response districts at different levels of multi-stage anaerobic/aerobic treatment unit, carry out ammonia nitrogen and organic matter removal in hypoxia response district at different levels and aerobic reactor zone;
(4) waste water that step (3) processed is entered mud-water separation unit, primary water is discharged by the effluent weir of periphery, a precipitating sludge part is back to the first step hypoxia response district of multi-stage anaerobic/aerobic treatment unit by sludge pump, remainder is discharged through sludge bucket;
Described multi-stage anaerobic/aerobic treatment unit is three grades of anoxic/aerobic treatment unit, and the volumetric ratio of described hypoxia response district and aerobic reactor zone is (1:2) ~ (1:3); The waste water of described biochemical treatment from the first step to the flooding velocity ratio in third stage hypoxia response district be 3:2:1; The total hydraulic detention time (HRT) of described three grades of anoxic/aerobic treatment unit is 24 ~ 36 hours; The temperature of described three grades of anoxic/aerobic treatment unit controls at 15 ~ 30 DEG C, the Dissolved Oxygen concentration Control of aerobic reactor zone is at 2 ~ 3mg/L, and the mean sludge rate of load condensates at different levels of three grades of anoxic/aerobic treatment unit remain on 0.15 ~ 0.25kgCOD/(kgMLVSSd).
2. one according to claim 1 high ammonia nitrogen leather-making waste water biochemical denitrification treatment process, it is characterized in that: described multi-stage anaerobic/aerobic treatment unit is level Four anoxic/aerobic treatment unit, the volumetric ratio of described hypoxia response district and aerobic reactor zone is (1:2) ~ (1:3); The waste water of described biochemical treatment from the first step to the flooding velocity ratio in fourth stage hypoxia response district be 4:3:2:1; The total hydraulic detention time (HRT) of described level Four anoxic/aerobic treatment unit is 24 ~ 36 hours; The temperature of described level Four anoxic/aerobic treatment unit controls at 15 ~ 30 DEG C, the Dissolved Oxygen concentration Control of aerobic reactor zone is at 2 ~ 3mg/L, and the mean sludge rate of load condensates at different levels of level Four anoxic/aerobic treatment unit remain on 0.15 ~ 0.25kgCOD/(kgMLVSSd).
3. one according to claim 1 high ammonia nitrogen leather-making waste water biochemical denitrification treatment process, is characterized in that: the mud being back to multi-stage anaerobic/aerobic treatment unit in described step (4), its control of reflux ratio is 50% ~ 100%.
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| CN103112951B (en) * | 2013-03-18 | 2014-04-02 | 南京大学宜兴环保研究院 | Biochemical method for treating synthetic leather wastewater containing dimethylformamide |
| CN103319047A (en) * | 2013-06-29 | 2013-09-25 | 惠州市众惠环保工程有限公司 | Landfill leachate treatment system |
| CN103395882A (en) * | 2013-08-07 | 2013-11-20 | 上海在田环境科技有限公司 | Processing method and processing apparatus of high ammonia-nitrogen wastewater |
| CN104787960B (en) * | 2014-12-10 | 2017-03-15 | 重庆隆发皮革制品有限责任公司 | A kind of handling process of leather waste water and processing system |
| CN104710087B (en) * | 2015-04-07 | 2017-01-11 | 山东省环境保护科学研究设计院 | Hypoxia-aerobic comprehensive treatment method for tannery waste water |
| CN104891745B (en) * | 2015-06-11 | 2017-01-18 | 王舜和 | Upgrading and reconstruction method based on constructed rapid infiltration sewage treatment facility |
| CN105174462A (en) * | 2015-10-13 | 2015-12-23 | 杨林 | Papermaking wastewater treatment process |
| CN105776539B (en) * | 2016-03-28 | 2018-07-06 | 哈尔滨工业大学 | The application process of the autotrophic denitrification device of low carbon source urban sewage segmental influent multistage A/O techniques based on short-cut denitrification |
| CN106396258B (en) * | 2016-09-29 | 2019-10-11 | 中冶华天工程技术有限公司 | Handle the process of coking wastewater |
| CN110606618B (en) * | 2018-06-15 | 2022-01-28 | 碧兴（福建）环保科技有限公司 | Treatment process for treating high-concentration industrial wastewater by using pure microorganisms |
| CN110627211A (en) * | 2019-10-15 | 2019-12-31 | 怡灏环境技术有限公司 | Synchronous nitrification and denitrification treatment system |
| CN111320323A (en) * | 2020-02-27 | 2020-06-23 | 山东海景天环保科技股份公司 | Treatment method of high-total-nitrogen leather wastewater |
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