CN104003579A - Method for processing town sewage by bypass nitrosation-anaerobic ammonia oxidation filter - Google Patents
Method for processing town sewage by bypass nitrosation-anaerobic ammonia oxidation filter Download PDFInfo
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- CN104003579A CN104003579A CN201410232683.3A CN201410232683A CN104003579A CN 104003579 A CN104003579 A CN 104003579A CN 201410232683 A CN201410232683 A CN 201410232683A CN 104003579 A CN104003579 A CN 104003579A
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Abstract
The invention discloses a method for processing town sewage by a bypass nitrosation-anaerobic ammonia oxidation filter. The method comprises the following steps: firstly, feeding town sewage into an anaerobic phosphorus removal pool; generating adenosine triphosphate (ATP) when decomposing polyphosphates in cells by phosphorus removing bacteria; feeding effluent from the anaerobic phosphorus removal pool into an aerobic pool; decomposing organic matters in the sewage by activated sludge, taking in phosphorus in the sewage, and ammonifying organic nitrogen; feeding effluent from the aerobic pool into a settling pond, and carrying out solid-liquid separation; directly feeding 51% of effluent from the settling pond into an anaerobic ammonia oxidation filter; feeding the other 49% of effluent of the settling pond into a nitrosation filter through a side road, oxidizing ammonia nitrogen in the sewage into nitrite, and then feeding the anaerobic ammonia oxidation filter; converting ammonia nitrogen and nitrite in the sewage into a nitrogen gas in the anaerobic ammonia oxidation filter. Compared with the conventional town sewage treatment method, each treatment unit is stronger in reaction specificity, shorter in standing time, higher in removal rate, lower in consumption of an organic carbon source, energy-saving, and relatively good in stability, and the reaction condition is easy to control.
Description
Technical field
The invention belongs to field of environment protection, be specifically related to the method that town sewage is processed in a kind of bypass nitrosation-anaerobic ammoxidation filter tank.
Background technology
In " 12 " the national economic and social development planning outline, clearly propose ammonia nitrogen and reduce discharging 10% target.As newly-increased the binding indicator, the system that ammonia nitrogen reduces discharging and measure are badly in need of exploring in practice.As everyone knows, domestic pollution is the main emission source of ammonia nitrogen, so town sewage processing is as the Main Means of ammonia nitrogen reduction, will become the main field that ammonia nitrogen reduces discharging.Simultaneously, ring Taihu Lake Mixing Coefficient in Rectangular Channels flux result of study shows, the dephosphorization of control nitrogen is the key of administering Taihu Lake body eutrophication, urban wastewater treatment firm draining has become large source of pollution of basin nitrogen, phosphorus, and the qualified discharge of ammonia nitrogen and total nitrogen index becomes the emphasis that urban wastewater treatment firm is proposed mark transformation.
Traditional biological denitrification process is generally nitrated-denitrification process.There are some problems in traditional biological denitrification process: (1) floor space is large, and initial cost is high.(2) because nitrifying bacteria community rate of propagation is slow and be difficult to the biological concentration that remains higher, particularly, in low temperature winter, cause the HRT of system longer, need larger aeration tank, increased investment and working cost.(3) complete nitrification-denitrification process oxygen requirement is large, causes energy consumption larger.(4) denitrification is large to the demand of organic carbon source, and the sewage of low C/N ratio needs additional carbon, and working cost increases.(5) need to supplement basicity, increase processing costs.Therefore, people actively inquire into the efficient new bio denitrogenation novel process of exploitation.
New bio denitrogenation novel process has short-cut nitrification and denitrification technique and anaerobic ammonia oxidation process etc., has solved to a certain extent the problem that traditional biological denitrification process exists; But in actual application, find, the more difficult control of novel process reaction conditions, obligate is not strong, and bacterial classification easily runs off, and Treatment Stability is poor, and very responsive to reality factors such as temperature, load, the water yields, these have all limited the practice of anaerobic ammonia oxidation reactor.
Summary of the invention
The object of this invention is to provide a kind of bypass nitrosation-anaerobic ammoxidation filter tank and process the method for town sewage, overcome prior art reaction conditions control difficult, through engineering approaches application be subject to restriction, running cost high, remove that load is low, the easy defect such as loss of bacterial classification, there is reaction obligate stronger, the residence time is shorter, clearance is higher, more energy-conservation, reaction conditions is more easy to control, the better feature of stability.
The method that town sewage is processed in bypass nitrosation-anaerobic ammoxidation filter tank is: first town sewage enters anaerobism dephosphorization pond, dissolved oxygen is less than 0.3mg/L, by dephosphorization bacterial, decompose intracellular poly-phosphate and produce ATP simultaneously, the residence time is 0.9h, and sludge concentration is 5500-6500mg/L; Anaerobism dephosphorization pond water outlet enters Aerobic Pond, by active sludge, decomposes the organic substance in sewage, the phosphorus in picked-up sewage, and ammonification organonitrogen, and the residence time is 3.9h, and sludge concentration is 5500-6500mg/L, and dissolved oxygen is 2.5-3.5mg/L; Aerobic Pond water outlet enters settling tank, carries out solid-liquid separation, and mud 45% is back to anaerobism dephosphorization pond, and all the other mud are arranged outward, and the residence time is 2h; 51% of settling tank water outlet directly enters Anammox filter tank; Other 49% of settling tank water outlet is bypassed to nitrosification filter tank, by the nitrococcus being attached on high-strength elastic urethane and plastics cascade ring 1:1.1 mixed fillers, the ammonia nitrogen in sewage is oxidized to nitrite, the residence time is 0.8h, sludge concentration is 25000-30000mg/L, dissolved oxygen is 0.8-1.5mg/L, then enters Anammox filter tank; In Anammox filter tank, dissolved oxygen is less than 0.2mg/L, by the anaerobic ammonia oxidizing bacteria that is attached on high-strength elastic urethane and plastics cascade ring 1:1.2 mixed fillers, by ammonia nitrogen in sewage and Nitrite transformation, be nitrogen, the residence time is 0.9h, and sludge concentration is 20000-25000mg/L.
It is 80% that described nitrosification filter tank adopts the filling ratio of high-strength elastic urethane and plastics cascade ring 1:1.1 mixed fillers, and wherein high-strength elastic urethane filler specification is 6 * 6 * 6mm, and plastics cascade ring specification is 50 * 25 * 2mm.Described nitrosification filter tank inoculation bacterial classification is chemosynthetic autotroph nitrococcus.Described Anammox filter tank adopts high-strength elastic urethane and plastics cascade ring 1:1.2 mixed fillers, and filling ratio is 70%, and wherein high-strength elastic urethane filler specification is 9 * 9 * 9mm, and plastics cascade ring specification is 76 * 38 * 3mm.Described Anammox filter tank inoculation bacterial classification is chemosynthetic autotroph anaerobic ammonia oxidizing bacteria.
The beneficial effect that the present invention compared with prior art has:
1, the reaction obligate of each processing unit is stronger, and clearance is higher.Anaerobism dephosphorization pond, decomposes intracellular poly-phosphate by dephosphorization bacterial and produces ATP simultaneously; Aerobic Pond decomposes the organic substance in sewage by active sludge, the phosphorus in picked-up sewage, and ammonification organonitrogen; Nitrosification filter tank is oxidized to nitrite by nitrococcus obligate by the ammonia nitrogen in sewage; Anammox filter tank is nitrogen by anaerobic ammonia oxidizing bacteria obligate by ammonia nitrogen in sewage and Nitrite transformation; The reaction of each processing unit is non-interference, and obligate is stronger, and clearance is higher.
2, organic carbon source consumption is lower, more energy-conservation.Sewage 49% is bypassed to nitrosification filter tank, and other 51% without carrying out nitrosation reaction, and therefore, the consumption of oxygen is 33% of ordinary method; Meanwhile, adopted anaerobic ammonia oxidation process, when total nitrogen is removed without additional organic carbon source.
3, the residence time is shorter.Nitrosification filter tank adopts high-strength elastic urethane and plastics cascade ring 1:1.1 mixed fillers; Anammox filter tank adopts high-strength elastic urethane and plastics cascade ring 1:1.2 mixed fillers; Above-mentioned packing specific area is large, and good hydrophilic property is difficult for stopping up, and strong to the adhesive ability of nitrococcus and anaerobic ammonia oxidizing bacteria, therefore, biomass is large, and pollutant removal load is high, and the residence time is shorter.
4, reaction conditions is more easy to control, and stability is better.Each processing unit is separate, and having adopted filler, the bacterial classification of obligate, the processing parameter that need not accurately control each step of reaction can reach design requirements, makes it the most easily adapt to the variation of each parameter of town sewage, the most easily realize through engineering approaches application, stability is better.
The present invention compares with conventional town sewage treatment process, and the reaction obligate of each processing unit is stronger, and the residence time is shorter, and clearance is higher, and organic carbon source consumption is lower, more energy-conservation, and reaction conditions is more easy to control, and stability is better.
Accompanying drawing explanation
Accompanying drawing is the schematic flow sheet that the method for town sewage is processed in bypass nitrosation-anaerobic ammoxidation filter tank.
Embodiment
The town sewage COD that in this example, process in bypass nitrosation-anaerobic ammoxidation filter tank
crfor 400-500mg/L, TP is 1-2 mg/L, NH
3-N is 30-40mg/L, and TN is 40-60mg/L.
The method of town sewage is processed in the bypass nitrosation-anaerobic ammoxidation filter tank of this exemplary application, first town sewage enters anaerobism dephosphorization pond, dissolved oxygen is less than 0.3mg/L, by dephosphorization bacterial, decompose intracellular poly-phosphate and produce ATP simultaneously, the residence time is 0.9h, and sludge concentration is 5500-6500mg/L; Anaerobism dephosphorization pond water outlet enters Aerobic Pond, by active sludge, decomposes the organic substance in sewage, the phosphorus in picked-up sewage, and ammonification organonitrogen, and the residence time is 3.9h, and sludge concentration is 5500-6500mg/L, and dissolved oxygen is 2.5-3.5mg/L; Aerobic Pond water outlet enters settling tank, carries out solid-liquid separation, and mud 45% is back to anaerobism dephosphorization pond, and all the other mud are arranged outward, and the residence time is 2h; 51% of settling tank water outlet directly enters Anammox filter tank; Other 49% of settling tank water outlet is bypassed to nitrosification filter tank, by the nitrococcus being attached on high-strength elastic urethane and plastics cascade ring 1:1.1 mixed fillers, the ammonia nitrogen in sewage is oxidized to nitrite, the residence time is 0.8h, sludge concentration is 25000-30000mg/L, dissolved oxygen is 0.8-1.5mg/L, then enters Anammox filter tank; In Anammox filter tank, dissolved oxygen is less than 0.2mg/L, by the anaerobic ammonia oxidizing bacteria that is attached on high-strength elastic urethane and plastics cascade ring 1:1.2 mixed fillers, by ammonia nitrogen in sewage and Nitrite transformation, be nitrogen, the residence time is 0.9h, and sludge concentration is 20000-25000mg/L.The high-strength elastic urethane filler specification that nitrosification filter tank adopts is 6 * 6 * 6mm, and plastics cascade ring specification is 50 * 25 * 2mm, and inoculation bacterial classification is chemosynthetic autotroph nitrococcus.The high-strength elastic urethane filler specification that Anammox filter tank adopts is 9 * 9 * 9mm, and plastics cascade ring specification is 76 * 38 * 3mm, and inoculation bacterial classification is chemosynthetic autotroph anaerobic ammonia oxidizing bacteria.
Treated, water outlet COD
mnfor 45-50mg/L, TP is 0.45-0.5 mg/L, NH
3-N is 1-3mg/L, and TN is 4-6mg/L, reaches the one-level A standard of urban wastewater treatment firm emission standard.
Claims (5)
1. the method for town sewage is processed in a bypass nitrosation-anaerobic ammoxidation filter tank, it is characterized in that: first town sewage enters anaerobism dephosphorization pond, dissolved oxygen is less than 0.3mg/L, by dephosphorization bacterial, decompose intracellular poly-phosphate and produce ATP simultaneously, the residence time is 0.9h, and sludge concentration is 5500-6500mg/L; Anaerobism dephosphorization pond water outlet enters Aerobic Pond, by active sludge, decomposes the organic substance in sewage, the phosphorus in picked-up sewage, and ammonification organonitrogen, and the residence time is 3.9h, and sludge concentration is 5500-6500mg/L, and dissolved oxygen is 2.5-3.5mg/L; Aerobic Pond water outlet enters settling tank, carries out solid-liquid separation, and mud 45% is back to anaerobism dephosphorization pond, and all the other mud are arranged outward, and the residence time is 2h; 51% of settling tank water outlet directly enters Anammox filter tank; Other 49% of settling tank water outlet is bypassed to nitrosification filter tank, by the nitrococcus being attached on high-strength elastic urethane and plastics cascade ring 1:1.1 mixed fillers, the ammonia nitrogen in sewage is oxidized to nitrite, the residence time is 0.8h, sludge concentration is 25000-30000mg/L, dissolved oxygen is 0.8-1.5mg/L, then enters Anammox filter tank; In Anammox filter tank, dissolved oxygen is less than 0.2mg/L, by the anaerobic ammonia oxidizing bacteria that is attached on high-strength elastic urethane and plastics cascade ring 1:1.2 mixed fillers, by ammonia nitrogen in sewage and Nitrite transformation, be nitrogen, the residence time is 0.9h, and sludge concentration is 20000-25000mg/L.
2. a kind of bypass nitrosation-anaerobic ammoxidation according to claim 1 is processed the method for town sewage, it is characterized in that, it is 80% that described nitrosification filter tank adopts the filling ratio of high-strength elastic urethane and plastics cascade ring 1:1.1 mixed fillers, wherein high-strength elastic urethane filler specification is 6 * 6 * 6mm, and plastics cascade ring specification is 50 * 25 * 2mm.
3. a kind of bypass nitrosation-anaerobic ammoxidation according to claim 1 is processed the method for town sewage, it is characterized in that, described nitrosification filter tank inoculation bacterial classification is chemosynthetic autotroph nitrococcus.
4. a kind of bypass nitrosation-anaerobic ammoxidation according to claim 1 is processed the method for town sewage, it is characterized in that, described Anammox filter tank adopts high-strength elastic urethane and plastics cascade ring 1:1.2 mixed fillers, filling ratio is 70%, wherein high-strength elastic urethane filler specification is 9 * 9 * 9mm, and plastics cascade ring specification is 76 * 38 * 3mm.
5. a kind of bypass nitrosation-anaerobic ammoxidation according to claim 1 is processed the method for town sewage, it is characterized in that, described Anammox filter tank inoculation bacterial classification is chemosynthetic autotroph anaerobic ammonia oxidizing bacteria.
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| CN110563285A (en) * | 2019-10-23 | 2019-12-13 | 大连力达环境工程有限公司 | Integrated biogas slurry wastewater treatment system and treatment process thereof |
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| CN1309665C (en) * | 2004-11-19 | 2007-04-11 | 宋乾武 | Nitrogen and phosphorus removing process |
| CN101244883B (en) * | 2008-03-21 | 2011-01-12 | 北京工业大学 | High-efficiency low-consumption retexture method for urban sewage |
| CN103112999B (en) * | 2013-02-25 | 2014-04-30 | 北京工业大学 | Regeneration method for urban sewage by continuous flow |
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| CN110563285A (en) * | 2019-10-23 | 2019-12-13 | 大连力达环境工程有限公司 | Integrated biogas slurry wastewater treatment system and treatment process thereof |
| CN110563285B (en) * | 2019-10-23 | 2024-02-23 | 大连力达环境工程有限公司 | Integrated biogas slurry wastewater treatment system and treatment process thereof |
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