[0037] Example
[0038] A method of treatment based on MBR-based high salinity, high-amine nitrogen concentration wastewater, using an immersion MBR membrane bioreactor, a total volume of 13.5 L, effective volume of 10L, membrane material is a hollow polyfial fluoride fiber film (aperture 0.03 μm, film diameter of 1.0 mm, outer diameter of 2.2 mm, film area 0.235m 2 ) The processing method specifically includes the following steps:
[0039] S1, start phase: control device starts the desired conditions and the alkalinity required for wastewater, starting the MBR reactor, using artificially simulated wastewater, controlling the water supply conditions of the wastewater: salt concentration 10 g / L, ammonia nitrogen concentration 30 mg / L, COD concentration 360mg / L, simultaneous addition of microbial growth of phosphorus source and wastewater volume of 0.1% of the wastewater concentrate, and add NaHCO 3 Maintaining the alkalinity required for wastewater during nitrification, then adjusting the pH of the wastewater with HCl or NaOH Always maintained at 7-8, and the time of operation is day 1 - day 28, with a water ammonia concentration as an indicator, when the water The ammonia nitrogen removal rate reaches 99% or more and the reactor is operating stable, which can enter the ammonia nitrogen load promotion phase;
[0040] S2, ammonia nitrogen concentration promotion stage: On the basis of adaptation of salt concentration 10g / L, other operating conditions are not changed, the ammonia nitrogen concentration of wastewater water in the 29th day is raised from 30 mg / L to 60 mg / L, the run time is the 29th Day - 39 days; in the 40th day, the ammonia nitrogen concentration of wastewater water is increased from 60 mg / L to 120mg / L, the operating time is the 40th day - day 56; the ammonia nitrogen concentration of wastewater water in the 57th 120mg / L rose to 250mg / L, running time is 57th - day 71; the ammonia nitrogen concentration of wastewater water in the 72nd day is raised from 250mg / L to 500mg / L, running time is 72nd - 1177 Heaven; in the 118th day, the ammonia nitrogen concentration of wastewater water is raised from 500 mg / L to 1000 mg / L, the running time is 118 days - 178th; at the same time, HCl or NaOH adjustment is adjusted during each increase ammonia nitrogen concentration. The pH is 7-8 to maintain the corresponding alkalinity, with the ammonia nitrogen concentration of the water, when the ammonia nitrogen removal rate of the water reaches 99% or more and the reactor is operating stable, it can increase the water ammonia nitrogen concentration or enter the wastewater again. Salt concentration promotion phase;
[0041] S3, salt concentration promotion: On the basis of adapting to the ammonia nitrogen concentration of 1000 mg / L, the wastewater water salt concentration is increased from 10g / L to 20g / L in the 179th day, and the operation time is 179 days. - Day 202; In the 203th day, the water intake salt concentration was raised from 20g / L to 40 g / L, and the running time was 203 days - 2nd day; at the same time, HCl was used during each increase in salt concentration. NaOH adjusts the pH of 7-8 to maintain the corresponding alkalinity, with the ammonia nitrogen concentration of the water, when the ammonia nitrogen removal rate of the water reaches 99% or more and the reactor is operated to operate, it can increase the water concentration of wastewater again. .
[0042] Among them, the salt concentration of the wastewater in S1, S2, S3 is provided by NaOH, and the ammonia nitrogen concentration is from NH. 4 CL is provided, the COD concentration is supplied from glucose, and the phosphorus source is from kH. 2 PO 4 Provided, trace element concentrate is prepared from preparation.
[0043] In the case of S1 control wastewater, NaHCO 3 Add amount in the wastewater M (Nahco 3 : M (NH 4 + -N) = 12.5 proportion is added.
[0044] In the desired conditions of the control device of S1, the dissolved oxygen content of the reactor is 2 mg / L-6mg / L, and the control temperature condition is 20 ±. 5 ° C, the hydraulic residence time (HRT) is 14 h, the experiment cycle is not mucained, and the inoculation of the silt from the normal urban sewage treatment of the long sludge, which is preferably from a sewage treatment plant with high-efficiency ammonia nitrogen removal ability; The transmembrane pressure of the control film assembly is not more than 30 kPa. If the pressure sensor shows that the transmembrane pressure is greater than 30 kPa, the following method is cleaned:
[0045] S01, the membrane module is taken out from the MBR reactor for physical cleaning, and the filter cake layer of the surface of the cleaning film assembly is used.
[0046] S02, then chemically wash the film assembly to remove a substance attached to the surface of the membrane and the membrane. The film assembly is placed in a cleaning special case, and the mass fraction is 3% sodium hypochlorite solution, and the seal is formed into 30 ° C. In the constant temperature clocker, the reaction is oscillated at 50R / min, and then the film assembly is removed and the residual sodium hypochlorite is flushed with water;
[0047] S03, again placing the film assembly into the cleaning box, adding a mass fraction of 3% sulfuric acid solution, and then sealed into a 30 ° C constant temperature clocked bed, oscillating at 50 r / min, and then removes the film assembly and used It is clear that the residual sulfuric acid can be loaded into the MBR reactor;
[0048] S04, when the membrane module needs to be stored for a long time, the membrane module is placed in a sulfuric acid solution having a mass fraction of 1.5%.
[0049] The present invention uses nitrifying bacteria to bioderegelation treatment of high salinity, high-amine nitrogen concentration, using membrane modules in the MBR reactor to intercept the sludge, no manual mud, daily sludge emissions Zero, avoid the loss of sludge, and improve the concentration of sludge in the reactor; at the same time, under the conditions of the same water quality and hydraulic residence time, due to the concentration of sludge and sludge residence time (SRT) The extension, the number of organic substances per unit weight decreases in units of time, that is, the F / m ratio is worth reduced, thereby more conducive to the growth and enrichment of the self-reducing nitrification bacteria, and improves the anti-impact load of the reactor. The ability and efficiency and stability of the nitrification process.
[0050] The nitrification bacteria used in the nitrification process mainly includes ammonia oxide and nitrite oxide bacteria (NOB), first oxidizing ammonia nitrogen into a nitrogen, and then using nitrite oxide (B). NOB) Nitride nitrate nitrate nitrate nitrate nitrate. Since nitrate bacteria is more sensitive to pH changes, the sensitivity of nitrite oxide (NOB) to pH is more sensitive to the ammonia oxide (AOB), and NaHCO is required when the wastewater treatment is performed. 3 The alkalinity required for nitrification reactions is provided while maintaining the pH in the range of 7-8 to provide a weak alkaline environment suitable for nitrifying bacteria.
[0051] At the same time, by gradually increase the ammonia nitrogen concentration and salt concentration, the enrichment and domestication of nitrification sludge is carried out, the ammonia nitrogen is the growth substrate of nitroceritic bacteria, and the ammonia nitrogen concentration is conducive to the lifting of sludge concentration and the enrichment of the nitric glue. In the process of subsequent replacement salt, the high-efficiency removal of the ammonia nitrogen is guaranteed, and finally obtaining a high-amamine concentration, high salt concentration wastewater and controls the ammonia nitrogen removal rate of 99.5% or more and long-term stable operation. The ammonia nitrogen concentration of wastewater can reach 1000 mg / L, and the salt concentration can reach 40 g / L. At the same time, due to the nitrite oxide NOB, the ammonia nitrogen concentration of ammonia nitrogen in the reactor will inhibit Nob activity, affect the stability of the nitrification process, and therefore the selection of the selected water indicators of the nitrification process. The ammonia nitrogen removal rate reaches 99%, and since the ammonia oxide AOB is high, the removal rate of the ammonia nitrogen can reach 99% or more in the case where the reactor is operating normally.
[0052] This processing method overcomes the shortage of high-salt, high-salt, high-yield of high-salt, high-ampholidation, and low-temperature, low-temperature, chemical, pharmaceutical, coking, synthetic ammonia and synthetic ammonia The fields of leather and other areas are of great practical benefits in a large amount of high salinity and high-amamine concentration wastewater produced during the production process.
[0053] Effect verification:
[0054] I. Ammonia nitrogen removal rate: Detect by detecting the ammonia nitrogen concentration of the final water of S3 in the example, the ammonia nitrogen removal rate of the water to obtain an effluent is more than 99.5%, reaching the national urban sewage emission level A standard, and the equipment can run long-term operation Realize wastewater for high-efficiency high-salt, high-amineral concentration.
[0055] Second, the nitrogen nitrogen content: Detection of nitrid nitrogen and nitrate nitrogen content after the salt concentration in the extrapolatum and S3 in the exemplary ammonia nitrogen concentration is sequentially enhanced, and detect results like figure 1 As shown, each time the ammonia nitrogen concentration or salt concentration of the wastewater water is increased, the grease nitrogen concentration of the water will increase, which is because nitrite oxide bacteria (NOB) is more sensitive to environmental factors, thus The oxidation effect on the nitrous nitrogen in a transient time in environmental changes is not good; but the Nob can quickly restore efficient oxidation of the nitrid nitrogen, so that the nitrogen in the water is mainly present in the form of nitrate nitrogen; indicating The nitrification bacteria cultured in the solution of the present invention has strong resistance to salt concentration and ammonia nitrogen concentration, which can efficiently treat high-salt, high-amine nitrogen concentration wastewater, and the highest salt concentration reaches 40 g / L, ammonia nitrogen concentration reaches 1000 mg / L. Further, when the final salt concentration of the reactor in S3 is raised to 40 g / L and remain stable, the salt concentration is raised to 70 g / L, and the reactor crashes.
