WO2022062615A1 - 半短程硝化-厌氧氨氧化耦合硫自养反硝化实现生活污水深度脱氮的装置与方法 - Google Patents
半短程硝化-厌氧氨氧化耦合硫自养反硝化实现生活污水深度脱氮的装置与方法 Download PDFInfo
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- 230000001651 autotrophic effect Effects 0.000 title claims abstract description 27
- 239000010865 sewage Substances 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 14
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title claims abstract description 11
- 229910052717 sulfur Inorganic materials 0.000 title claims abstract description 11
- 239000011593 sulfur Substances 0.000 title claims abstract description 11
- 230000003647 oxidation Effects 0.000 title claims abstract description 10
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 title abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 94
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 22
- 238000006243 chemical reaction Methods 0.000 claims abstract description 17
- 230000001105 regulatory effect Effects 0.000 claims abstract description 4
- 239000010802 sludge Substances 0.000 claims description 61
- 241000894006 Bacteria Species 0.000 claims description 19
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 16
- 239000007789 gas Substances 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 238000005273 aeration Methods 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 10
- 230000014759 maintenance of location Effects 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- 229910021529 ammonia Inorganic materials 0.000 claims description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 8
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 6
- 238000001556 precipitation Methods 0.000 claims description 6
- 230000035484 reaction time Effects 0.000 claims description 6
- 238000009280 upflow anaerobic sludge blanket technology Methods 0.000 claims description 6
- 230000000813 microbial effect Effects 0.000 claims description 5
- 239000002351 wastewater Substances 0.000 claims description 5
- 239000005416 organic matter Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 2
- 230000000630 rising effect Effects 0.000 claims description 2
- 238000004062 sedimentation Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 4
- 244000005700 microbiome Species 0.000 abstract description 4
- 230000002195 synergetic effect Effects 0.000 abstract 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 229910052799 carbon Inorganic materials 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 206010067482 No adverse event Diseases 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000037353 metabolic pathway Effects 0.000 description 2
- 231100000252 nontoxic Toxicity 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 230000035755 proliferation Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 206010021143 Hypoxia Diseases 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 241001509286 Thiobacillus denitrificans Species 0.000 description 1
- 239000000370 acceptor Substances 0.000 description 1
- 238000012258 culturing Methods 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000001146 hypoxic effect Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000002503 metabolic effect Effects 0.000 description 1
- 230000001546 nitrifying effect Effects 0.000 description 1
- 125000001477 organic nitrogen group Chemical group 0.000 description 1
- 230000002572 peristaltic effect Effects 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 150000003464 sulfur compounds Chemical class 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
- C02F3/303—Nitrification and denitrification treatment characterised by the nitrification
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
- C02F3/305—Nitrification and denitrification treatment characterised by the denitrification
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
- C02F3/307—Nitrification and denitrification treatment characterised by direct conversion of nitrite to molecular nitrogen, e.g. by using the Anammox process
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/163—Nitrates
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/166—Nitrites
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/06—Nutrients for stimulating the growth of microorganisms
Definitions
- the device and method for realizing deep denitrification of urban domestic sewage by semi-short-range nitrification-anammox coupled autotrophic denitrification involved in the present application belong to the field of biological sewage treatment and are suitable for deep denitrification of urban domestic sewage with low C/N ratio.
- Sulfur autotrophic denitrification utilizes the unique metabolic characteristics of denitrifying and desulfurizing bacteria such as Thiobacillus denitrificans, uses reducing sulfur compounds as electron donors and energy sources, and uses NO 3 - -N or NO 2 - -N as electron acceptors.
- the front end of this experiment uses semi-short-range nitrification effluent to provide NH 4 + -N and NO 2 - -N for anammox, and the back end is based on the chemoautotrophic characteristics of sulfur autotrophic denitrifying bacteria, which is coupled with anammox , with the advantages of saving aeration amount and low sludge output.
- Short-range nitrification means that the traditional nitrification process is controlled in the ammonia oxidation stage, which can be realized by real-time control, that is, in the nitrification process, when the ammonia oxidation reaction ends, no H + is produced in the system, and the pH value change curve will appear.
- the inflection point from falling to rising is the "ammonia nitrogen valley point”, so the pH change in the system can be monitored in real time.
- the pH curve reaches the "ammonia nitrogen valley point”
- the aeration is stopped to control the nitrification reaction in the ammonia oxidation stage, which is anaerobic ammonia.
- the oxidation reaction provides the substrate NO 2 - -N, and the semi-short-range nitrification needs to stop aeration before the ammonia valley point, and the mass concentration ratio of NH 4 + -N to NO 2 - -N in the effluent is 1-1.32.
- the autotrophic denitrification of sulfur can use a variety of electron donors.
- FeS as the electron donor, has no toxic effect on anammox bacteria during the autotrophic denitrification process, and both types of bacteria use CO2 as the carbon source. Therefore, the complementarity of the metabolic pathways of the two types of bacteria and the consistency of the proliferation rate can achieve a stable coexistence relationship.
- the two types of bacteria can synergistically remove the total nitrogen in the system and improve the total nitrogen removal rate of the system, thereby Improve effluent quality.
- the application provides a device and method for semi-short-range nitrification-anammox coupled sulfur autotrophic denitrification to realize deep denitrification of urban domestic sewage, the purpose is to solve the problem of insufficient carbon source in the traditional sewage treatment process, and at the same time improve the effluent water quality.
- the device of semi-short-range nitrification-anammox coupled sulfur autotrophic denitrification treatment of urban domestic sewage is characterized in that: be provided with raw water tank (1), semi-short-range nitrification reactor (2), intermediate water tank (3) and upstream type anammox nitrification and denitrification granular sludge reactor (4): the raw water tank (1) is provided with an inlet pump I; the semi-short-range nitrification reactor (2) is provided with a pH measuring instrument (2.1), an aeration device (2.2) ), DO measuring instrument (2.5), gas flow meter (2.7), air pump (2.6), stirring device (2.8), drain valve (2.4) and mud valve (2.3); the intermediate water tank (3) is provided with an inlet pump II;
- the up-flow anammox coupled denitrification granular sludge reactor (4) is provided with a temperature control device (4.1), a pH/DO measuring instrument (4.4), a water outlet pipe (4.6) and a
- the raw water tank (1) is connected to the water inlet of the short-range nitrification reactor (2) through the inlet pump I (1.1); ) is connected; the water inlet of the up-flow anammox coupled denitrification granular sludge reactor (4) is connected to the intermediate water tank (3) through the feed pump II (3.1), and the up-flow anammox coupled denitrification granular sludge reaction
- the water outlet of the device (4) is drained through the water outlet pipe (4.6).
- the device of semi-short-range nitrification-anammox coupled sulfur autotrophic denitrification treatment of urban domestic sewage is characterized in that: be provided with raw water tank (1), semi-short-range nitrification reactor (2), intermediate water tank (3) and anaerobic Oxygen ammonium oxidation coupled autotrophic denitrification reactor (4): the raw water tank (1) is provided with an inlet pump I; the short-range nitrification reactor (2) is provided with a pH measuring instrument (2.1), aeration device (2.2), DO measurement instrument (2.5), gas flow meter (2.7), air pump (2.6), stirring device (2.8), drain valve (2.4) and mud valve (2.3); the intermediate water tank (3) is provided with an inlet pump II; The anammox coupled denitrification granular sludge reactor (4) is provided with a temperature control device (4.1), a pH/DO measuring instrument (4.4), a water outlet pipe (4.6) and a gas collecting port (4.7).
- a temperature control device
- the raw water tank (1) is connected to the water inlet of the semi-short-range nitrification reactor (2) through the inlet pump I (1.1); ) is connected; the water inlet of the anammox coupled denitrification reactor (4) is connected to the intermediate water tank (3) through the inlet pump II (3.1), and the water outlet of the anammox coupled denitrification reactor (4) is connected with the water outlet pipe ( 4.6) Drainage.
- the nitrifying bacteria are controlled by the temperature control device to control the temperature in the reactor to 30 ⁇ 1°C, and adjust the pH to 7-8; cultivate for more than 3 months to fully enrich the functional microorganisms, collect sludge samples to identify the microbial community structure, and carry out pollution control.
- the temperature control device controls the temperature in the reactor to 30 ⁇ 1°C, and adjust the pH to 7-8; cultivate for more than 3 months to fully enrich the functional microorganisms, collect sludge samples to identify the microbial community structure, and carry out pollution control.
- the concentration of FeS is 5 times the concentration of the mixed sludge, and FeS is added to the mixed sludge.
- the mass concentration of FeS added in each 1L reactor is 10% to 20% of the ammonia nitrogen mass concentration of the influent in the reactor; the sludge concentration in the reactor after control is 4000. ⁇ 5000mg/L, the ascending flow rate is 0.5m/h, and the hydraulic retention time is 150-160min; when the NH 4 + -N and NO 2 - -N concentrations in the effluent of the reactor are both less than 5mg/L, the reactor is considered to be started success;
- the domestic sewage enters the semi-short-range nitrification reactor through the inlet pump I, and the AO operation is turned on.
- the SBR reactor undergoes five processes of water inflow, reaction, standing, precipitation, and water effluent.
- the SBR effluent containing NH 4 + -N and NO 2 - -N enters the intermediate water tank, and the sewage from the intermediate water tank is pumped into the anammox coupled denitrification reactor through the inlet pump II; the hydraulic retention time of the UASB is controlled to be 3 ⁇ 6h, that is, the flow rate is 1L/h ⁇ 3L/h; the sludge is not actively discharged during the operation; the temperature in the reactor is controlled by the temperature control device to be 30 ⁇ 1°C;
- the NH 4 + -N and NO 2 - -N of water are converted into N 2 ; while the autotrophic denitrifying bacteria use FeS as an electron donor to react with NO 3 - -N to produce NO 2 - -N, which further supplies anaerobic ammonia Oxidation reaction, so as to achieve the effect of deep denitrification; the effluent is discharged through the overflow of the U-shaped outlet pipe.
- the combined real-time control of hypoxic aeration is not only conducive to the realization of semi-short-range nitrification, providing substrates for anammox, but also saving energy consumption for aeration and reducing treatment costs;
- FeS as an electron donor for autotrophic denitrifying bacteria, has no toxic effect on anammox bacteria, and excessive FeS addition has no inhibitory effect on anammox bacteria;
- Both anammox bacteria and autotrophic denitrifiers are chemoautotrophic microorganisms with CO 2 as carbon source, so the complementarity of the two types of bacteria metabolic pathways and the consistency of proliferation rate can achieve a stable coexistence relationship .
- FIG. 1 is a schematic diagram of the apparatus of the present application.
- the raw water tank (1) is connected with the water inlet of the semi-short-range nitrification reactor (2) through the inlet pump I (1.1); the water outlet of the short-range nitrification reactor ((2) is connected with the intermediate water tank (3) through the drain valve (2.4);
- the water inlet of the up-flow anammox coupled denitrification granular sludge reactor (4) is connected to the intermediate water tank (3) through the feed pump II (3.1), and the up-flow anammox coupled denitrification granular sludge reactor (4) )
- the water outlet is drained through the water outlet pipe (4.6).
- the device of semi-short-range nitrification-anammox coupling denitrification treatment of urban domestic sewage is characterized in that: be provided with raw water tank (1), semi-short-range nitrification reactor (2), intermediate water tank (3) and anammox Coupled autotrophic denitrification reactor (4): the raw water tank (1) is provided with an inlet pump I; the short-range nitrification reactor (2) is provided with a pH tester (2.1), an aeration device (2.2), and a DO tester (2.5) ), gas flow meter (2.7), air pump (2.6), stirring device (2.8), drain valve (2.4) and mud valve (2.3); the intermediate water tank (3) is provided with an inlet pump II; up-flow anaerobic ammonia
- the oxidation coupled denitrification granular sludge reactor (4) is provided with a temperature control device (4.1), a pH/DO measuring instrument (4.4), a water outlet pipe (4.6) and a gas collecting port (4.7).
- the raw water tank (1) is connected to the water inlet of the semi-short-range nitrification reactor (2) through the inlet pump I (1.1); ) is connected; the water inlet of the anammox coupled denitrification reactor (4) is connected to the intermediate water tank (3) through the inlet pump II (3.1), and the water outlet of the anammox coupled denitrification reactor (4) is connected with the water outlet pipe ( 4.6) Drainage.
- the mass concentration of FeS added in each 1L reactor is 10% to 20% of the mass concentration of ammonia nitrogen in the influent water in the reactor;
- the sludge concentration in the reactor after mixing is controlled to be 4000 to 5000 mg /L, the ascending flow rate is 0.5m/h, and the hydraulic retention time is 150-160min; when the NH 4 + -N and NO 2 - -N concentrations in the effluent of the reactor are both less than 5 mg/L, the reactor is considered to be successfully started;
- the domestic sewage enters the semi-short-range nitrification reactor through the inlet pump I, and the AO operation is turned on.
- the SBR reactor undergoes five processes of water inflow, reaction, standing, precipitation, and water effluent.
- the SBR effluent containing NH 4 + -N and NO 2 - -N enters the intermediate water tank, and the sewage from the intermediate water tank is pumped into the anammox coupled denitrification reactor through the inlet pump II; the hydraulic retention time of the UASB is controlled to be 3 ⁇ 6h, that is, the flow rate is 1L/h ⁇ 3L/h; the sludge is not actively discharged during the operation; the temperature in the reactor is controlled by the temperature control device to be 30 ⁇ 1°C;
- the NH 4 + -N and NO 2 - -N of water are converted into N 2 ; while the autotrophic denitrifying bacteria use FeS as an electron donor to react with NO 3 - N to produce NO 2 - -N, which is further used for anaerobic ammonium oxidation reaction, so as to achieve the effect of deep denitrification; the effluent is discharged through the overflow of the U-shaped outlet pipe.
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- Hydrology & Water Resources (AREA)
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Abstract
半短程硝化-厌氧氨氧化耦合硫自养反硝化实现生活污水深度脱氮的装置与方法,属污水生物处理领域。装置包括原水水箱,半短程硝化反应器,调节水箱,厌氧氨氧化耦合反硝化反应器。生活污水进入半短程硝化反应器中,通过实时控制达到出水NO 2
--N和NH 4
+-N质量浓度比为1~1.32,出水进入中间水箱,后进入厌氧氨氧化耦合自养反硝化反应器,反应器内同时实现厌氧氨氧化和硫的自养反硝化的协同反应,达到脱氮的效果。本申请通过充分利用微生物间的协同作用,提高了脱氮效率,实现了高效节能的城市污水深度脱氮。
Description
交叉引用
本申请要求在2020年9月24日提交中国专利局、申请号为202011011160.8、发明名称为“半短程硝化-厌氧氨氧化耦合硫自养反硝化实现生活污水深度脱氮的装置与方法”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
本申请所涉及的半短程硝化-厌氧氨氧化耦合自养反硝化实现城市生活污水深度脱氮的装置与方法,属污水生物处理领域,适用于低C/N比城市生活污水深度脱氮。
人类活动会产生大量废水,其中包含C、N、P等多种元素副产物,导致了水体的氮、磷污染。其中城市污水中的氮素主要以有机氮和氨氮形式存在,不但对人体健康有极大的威胁;同时也会引起水体富营养化,破坏生态环境,造成水资源短缺。传统的硝化反硝化污水生物处理技术存在能耗较高,脱氮效率低的问题,为实现废水处理的可持续发展,可利用低耗高效的厌氧氨氧化工艺加以解决,而厌氧氨氧化反应会生成NO
3
--N,将其与反硝化相耦合是普遍选择。硫自养反硝化是利用脱氮硫杆菌等反硝化脱硫细菌独特的代谢特性,以还原性硫化合物作为电子供体和能源,以NO
3
--N或NO
2
--N作为电子受体。本实验前端以半短程硝化出水为厌氧氨氧化提供NH
4
+-N和NO
2
--N,后端基于硫自养反硝化菌的化能自养特性,将其与厌氧氨氧化耦合,具有节省曝气量,污泥产量低的优点。
短程硝化是指将传统的硝化过程控制在氨氧化阶段,可通过实时控制的方式实现,即在硝化过程中,当氨氧化反应结束时,系统内不再产生H
+,pH值变化曲线会出现由下降转为上升的拐点,即“氨氮谷点”,因此可实时监测系统内pH变化,在pH曲线达到“氨氮谷点”时停止曝气将硝化反应控制在氨氧化阶段,为厌氧氨氧化反应提供底物NO
2
--N,而半短程硝化需要在氨谷点之前停止曝气,达到出水NH
4
+-N与NO
2
--N的质量浓度比为1~1.32。
硫的自养反硝化可以采用多种电子供体,其中FeS作为电子供体在自养反硝化过程中对厌氧氨氧化菌无毒害作用,且两类菌均是以CO
2为碳源的化能自养微生物,因此两类菌代谢途径的互补性和增殖速率的一致性,可以实现稳定的共存关系,两类菌可协同去除系统中的总氮,提高系统总氮的去除率,从而改善出水水质。
发明内容
本申请提供的是一种半短程硝化-厌氧氨氧化耦合硫自养反硝化实现城市生活污水深度脱氮的装置与方法,目的是解决传统污水处理工艺中碳源不足的问题,同时提高出水水质。
1.半短程硝化-厌氧氨氧化耦合硫自养反硝化处理城市生活污水的装置其特征在于:设有原水箱(1)、半短程硝化反应器(2)、中间水箱(3)和上流式厌氧氨氧化合反硝化颗粒污泥反应器(4):原水箱(1)设有进水泵Ⅰ;半短程硝化反应器(2)设有pH测定仪(2.1)、曝气装置(2.2)、DO测定仪(2.5)、气体流量计(2.7)、空气泵(2.6)、搅拌装置(2.8)、排水阀(2.4)和排泥阀(2.3);中间水箱(3)设有进水泵Ⅱ;上流式厌氧氨氧化耦合反硝化颗粒污泥反应器(4)设有温控装置(4.1)、pH/DO测定仪(4.4)、出水管(4.6)和集气口(4.7)。
实验装置连接:原水箱(1)通过进水泵Ⅰ(1.1)与短程硝化反应器(2)进水口相连;程硝化反应器((2)出水口通过排水阀(2.4)与与中间水箱(3)相连;上流式厌氧氨氧化耦合反硝化颗粒污泥反应器(4)进水口通过进水泵Ⅱ(3.1)与中间水箱(3)相连,上流式厌氧氨氧化耦合反硝化颗粒污泥反应器(4)出水口通过出水管(4.6)进行排水。
1.半短程硝化-厌氧氨氧化耦合硫自养反硝化处理城市生活污水的装置其特征在于:设有原水箱(1)、半短程硝化反应器(2)、中间水箱(3)和厌氧氨氧化耦合自养反硝化反应器(4):原水箱(1)设有进水泵Ⅰ;短程硝化反应器(2)设有pH测定仪(2.1)、曝气装置(2.2)、DO测定仪(2.5)、气体流量计(2.7)、空气泵(2.6)、搅拌装置(2.8)、排水阀(2.4)和排泥阀(2.3);中间水箱(3)设有进水泵Ⅱ;上流式厌氧氨氧化耦合反硝化颗粒污泥反应器(4)设有温控装置 (4.1)、pH/DO测定仪(4.4)、出水管(4.6)和集气口(4.7)。
实验装置连接:原水箱(1)通过进水泵Ⅰ(1.1)与半短程硝化反应器(2)进水口相连;程硝化反应器((2)出水口通过排水阀(2.4)与中间水箱(3)相连;厌氧氨氧化耦合反硝化反应器(4)进水口通过进水泵Ⅱ(3.1)与中间水箱(3)相连,厌氧氨氧化耦合反硝化反应器(4)出水口通过出水管(4.6)进行排水。
2.实验步骤:
(1)系统的启动:
(1.1)半短程硝化反应器的启动:接种短程硝化絮体污泥,控制污泥浓度为2500~3000mg/L,水力停留时间4~5h,污泥龄10~15d;每周期通过蠕动泵将污水从原水箱抽入反应器中,低氧曝气搅拌,控制反应器内溶解氧为0.5~2.0mg/L,沉淀排水,排水比为50%,当半短程硝化SBR反应器出水中的NH
4
+-N与NO
2
--N的质量浓度比为1~1.3时,完成半短程硝化SBR反应器的启动过程,其出水排入调节水箱;
(1.2)厌氧氨氧化耦合反硝化反应器的启动:①接种厌氧氨氧化颗粒污泥,污泥平均粒径为0.3~0.5mm;运行过程中不主动排泥;通过温控装置控制反应器内温度为30±1℃;②在缺氧UASB反应器中以浓度为30~50mg/LNa
2S
2O
3和20~40mg/LNaNO
3配的模拟废水为进水富集培养自养反硝化菌,通过温控装置控制反应器内温度为30±1℃,调节pH为7~8;培养3个月以上使功能微生物充分富集,收集污泥样品进行微生物群落结构的辨识,进行污泥内微生物丰度分析,当菌群丰度>10%即可;③依照污泥浓度将厌氧氨氧化污泥与反硝化污泥混合,厌氧氨氧化污泥浓度大于等于反硝化污泥浓度的5倍,在混合污泥内加入FeS,每1L反应器内FeS所加质量浓度是反应器内进水氨氮质量浓度的10%~20%;控制混合后反应器内污泥浓度为4000~5000mg/L,上升流速为0.5m/h,水力停留时间为150~160min;当反应器出水NH
4
+-N及NO
2
--N浓度均小于5mg/L时,即认为该反应器启动成功;
(2)启动成功后的运行操作:
(2.1)生活污水通过进水泵Ⅰ进入半短程硝化反应器中,开启AO运行,SBR反应器经历进水、反应、静置、沉淀、出水五个过程,进水后厌氧搅拌,反应时间为30~60min,可去除水中有机物;随后开启空气泵,进行好氧搅拌,通过调节气体流量计控制溶解氧为0.3~2mg/L,进行半短程硝化反应,反应时间为3~4h;搅拌结束后,静置沉淀30~60min后开启排水阀,排水比为50%,通过定期排泥控制污泥龄为10~15d;反应出水中NH
4
+-N与NO
2
--N的质量浓度比为1~1.32;
(2.2)含有NH
4
+-N与NO
2
--N的SBR出水进入中间水箱,通过进水泵Ⅱ将中间水箱的污水泵入厌氧氨氧化耦合反硝化反应器内;控制UASB水力停留时间为3~6h,即流速为1L/h~3L/h;运行过程中不主动排泥;通过温控装置控制反应器内温度为30±1℃;反应器内通过厌氧氨氧化菌作用将进水的NH
4
+-N与NO
2
--N转化为N
2;而自养反硝化菌则通过FeS作为电子供体与NO
3
--N反应产生NO
2
--N,进一步供厌氧氨氧化反应,从而达到深度脱氮的作用;出水通过U型出水管溢流排出。
(3)实验装置的优点:
1.通过低氧曝气联合实时控制不仅有利于半短程硝化的实现,为厌氧氨氧化提供底物,还能够节约曝气能耗,降低处理成本;
2.通过自养反硝化作用去除厌氧氨氧化反应的副产物,提高了系统的脱氮效率,改善了出水水质;
3.FeS作为自养反硝化菌的电子供体,对厌氧氨氧化菌无毒害作用,且过量的FeS加入对厌氧氨氧化菌没有抑制作用;
4.厌氧氨氧化菌和自养反硝化菌均是以CO
2为碳源的化能自养微生物,因此两类菌代谢途径的互补性和增殖速率的一致性,可以实现稳定的共存关系。
图1是本申请的装置示意图。
主要符号说明如下:
1-进水箱 2-半短程硝化SBR反应器 3-中间水箱
4-厌氧氨氧化耦合自养反硝化反应器
1.1-蠕动泵Ⅰ 2.1-pH测定仪
2.2-曝气盘 2.3-排泥阀 2.4-排水阀
2.5-DO测定仪 2.6-气泵 2.7-转子流量计
2.8-搅拌装置
3.1-蠕动泵
4.1-温控 4.2-进水阀 4.3-蠕动泵
4.4-pH/DO测定仪 4.5-回流口
4.6-出水口区 4.7-集气口
原水箱(1)通过进水泵Ⅰ(1.1)与半短程硝化反应器(2)进水口相连;程硝化反应器((2)出水口通过排水阀(2.4)与与中间水箱(3)相连;上流式厌氧氨氧化耦合反硝化颗粒污泥反应器(4)进水口通过进水泵Ⅱ(3.1)与中间水箱(3)相连,上流式厌氧氨氧化耦合反硝化颗粒污泥反应器(4)出水口通过出水管(4.6)进行排水。
1.半短程硝化-厌氧氨氧化耦合反硝化处理城市生活污水的装置其特征在于:设有原水箱(1)、半短程硝化反应器(2)、中间水箱(3)和厌氧氨氧化耦合自养反硝化反应器(4):原水箱(1)设有进水泵Ⅰ;短程硝化反应器(2)设有pH测定仪(2.1)、曝气装置(2.2)、DO测定仪(2.5)、气体流量计(2.7)、空气泵(2.6)、搅拌装置(2.8)、排水阀(2.4)和排泥阀(2.3);中间水箱(3)设有进水泵Ⅱ;上流式厌氧氨氧化耦合反硝化颗粒污泥反应器(4)设有温控装置(4.1)、pH/DO测定仪(4.4)、出水管(4.6)和集气口(4.7)。
实验装置连接:原水箱(1)通过进水泵Ⅰ(1.1)与半短程硝化反应器(2)进水口相连;程硝化反应器((2)出水口通过排水阀(2.4)与中间水箱(3)相连;厌氧氨氧化耦合反硝化反应器(4)进水口通过进水泵Ⅱ(3.1)与中间水箱(3)相连,厌氧氨氧化耦合反硝化反应器(4)出水口通过出水管(4.6)进行排水。
2.实验步骤:
(1)系统的启动:
(1.1)半短程硝化反应器的启动:接种短程硝化絮体污泥,控制污泥浓度为2500~3000mg/L,水力停留时间4~5h,污泥龄10~15d;每周期通过蠕动泵将污水从原水箱抽入反应器中,低氧曝气搅拌,控制反应器内溶解氧为0.5~2.0mg/L,沉淀排水,排水比为50%,当半短程硝化SBR反应器出水中的NH
4
+-N与NO
2
--N的质量浓度比为1~1.3时,完成半短程硝化SBR反应器的启动过程,其出水排入调节水箱;
(1.2)厌氧氨氧化耦合反硝化反应器的启动:①接种厌氧氨氧化颗粒污泥,污泥平均粒径为0.3~0.5mm;运行过程中不主动排泥;通过温控装置控制反应器内温度为30±1℃;②在缺氧UASB中以浓度为30~50mg/LNa
2S
2O
3和20~40mg/LNaNO
3配的模拟废水为进水富集培养自养反硝化菌,通过温控装置控制反应器内温度为30±1℃,调节pH为7~8;培养3个月以上使功能微生物充分富集,收集污泥样品进行微生物群落结构的辨识,进行污泥内微生物丰度分析,当菌群丰度>10%即可;③依照污泥浓度将厌氧氨氧化污泥与反硝化污泥混合,厌氧氨氧化污泥浓度大于等于反硝化污泥浓度的5倍,在混合污泥内加入FeS,每1L反应器内FeS所加质量浓度是反应器内进水氨氮质量浓度的10%~20%;控制混合后反应器内污泥浓度为4000~5000mg/L,上升流速为0.5m/h,水力停留时间为150~160min;当反应器出水NH
4
+-N及NO
2
--N浓度均小于5mg/L时,即认为该反应器启动成功;
(2)启动成功后的运行操作:
(2.1)生活污水通过进水泵Ⅰ进入半短程硝化反应器中,开启AO运行,SBR反应器经历进水、反应、静置、沉淀、出水五个过程,进水后厌氧搅拌,反应时间为30~60min,可去除水中有机物;随后开启空气泵,进行好氧搅拌,通过调节气体流量计控制溶解氧为0.3~2mg/L,进行半短程硝化反应,反应时间为3~4h;搅拌结束后,静置沉淀30~60min后开启排水阀,排水比为50%,通过定期排泥控制污泥龄为10~15d;反应出水中NH
4
+-N与NO
2
--N的质量浓度比为1~1.32;
(2.2)含有NH
4
+-N与NO
2
--N的SBR出水进入中间水箱,通过进水泵Ⅱ将中间水箱的污水泵入厌氧氨氧化耦合反硝化反应器内;控制UASB水力停留时间为3~6h,即流速为1L/h~3L/h;运行过程中不主动排泥;通过温控装置控制反应器内温度为30±1℃;反应器内通过厌氧氨氧化菌作用将进水的NH
4
+-N与NO
2
--N转化为N
2;而自养反硝化菌则通过FeS作为电子供体与NO
3
—N反应产生NO
2
--N,进一步供厌氧氨氧化反应,从 而达到深度脱氮的作用;出水通过U型出水管溢流排出。
Claims (2)
- 半短程硝化-厌氧氨氧化耦合硫自养反硝化处理城市生活污水的装置,其特征在于:设有原水箱(1)、半短程硝化反应器(2)、中间水箱(3)和厌氧氨氧化耦合自养反硝化反应器(4):原水箱(1)设有进水泵Ⅰ;半短程硝化反应器(2)设有pH测定仪(2.1)、曝气装置(2.2)、DO测定仪(2.5)、气体流量计(2.7)、空气泵(2.6)、搅拌装置(2.8)、排水阀(2.4)和排泥阀(2.3);中间水箱(3)设有进水泵Ⅱ;上流式厌氧氨氧化耦合反硝化颗粒污泥反应器(4)设有温控装置(4.1)、pH/DO测定仪(4.4)、出水管(4.6)和集气口(4.7);实验装置连接:原水箱(1)通过进水泵Ⅰ(1.1)与半短程硝化反应器(2)进水口相连;程硝化反应器((2)出水口通过排水阀(2.4)与中间水箱(3)相连;厌氧氨氧化耦合反硝化反应器(4)进水口通过进水泵Ⅱ(3.1)与中间水箱(3)相连,厌氧氨氧化耦合反硝化反应器(4)出水口通过出水管(4.6)进行排水。
- 应用如权利要求1所述装置的方法,其特征在于:(1)系统的启动:(1.1)半短程硝化反应器的启动:接种短程硝化絮体污泥,控制污泥浓度为2500~3000mg/L,水力停留时间4~5h,污泥龄10~15d;每周期通过蠕动泵将污水从原水箱抽入半短程硝化反应器中,低氧曝气搅拌3~5h,控制溶解氧为0.5~2.0mg/L,沉淀排水,排水比为50%,当半短程硝化SBR反应器出水中的NH 4 +-N与NO 2 --N的质量浓度比为1~1.3时,完成半短程硝化SBR反应器的启动过程,其出水排入调节水箱;(1.2)厌氧氨氧化耦合反硝化反应器的启动:①接种厌氧氨氧化颗粒污泥,污泥平均粒径为0.3~0.5mm;运行过程中不主动排泥;通过温控装置控制反应器内温度为30±1℃;②在缺氧UASB反应器中以浓度为30~50mg/L Na 2S 2O 3和20~40mg/L NaNO 3配的模拟废水为进水富集培养自养反硝化菌,通过温控装置控制反应器内温度为30±1℃,调节pH为7~8;培养3个月以上进行污泥内微生物丰度分析,当菌群丰度>10%即可;③依照污泥浓度将厌氧氨氧化污泥与反硝化污泥混合,厌氧氨氧化污泥浓度大于等于反硝化污泥浓度的5倍,在混合污泥内加入FeS,每1L反应器内FeS所加质量浓度是反应器内进水氨氮质量浓度的10%~20%;控制混合后反应器内污泥浓度为4000~5000mg/L,上升流速为0.5m/h,水力停留时间为150~160min;当反应器出水NH 4 +-N及NO 2 --N浓度均小于5mg/L时,即认为该反应器启动成功;(2)启动成功后的运行操作:(2.1)生活污水通过进水泵Ⅰ进入半短程硝化反应器中,开启AO运行,SBR反应器经历进水、反应、静置、沉淀、出水五个过程,进水后厌氧搅拌,反应时间为30~60min,去除水中有机物;随后开启空气泵,进行好氧搅拌,通过调节气体流量计控制溶解氧为0.3~2mg/L,进行半短程硝化反应,反应时间为3~4h;搅拌结束后,静置沉淀30~60min后开启排水阀,排水比为50%,通过定期排泥控制污泥龄为10~15d;反应出水中NH 4 +-N与NO 2 --N的质量浓度比为1~1.32;(2.2)含有NH 4 +-N与NO 2 --N的SBR出水进入中间水箱,通过进水泵Ⅱ将中间水箱的污水泵入厌氧氨氧化耦合反硝化反应器内;控制UASB水力停留时间为3~6h,即流速为1L/h~3L/h;运行过程中不主动排泥;通过温控装置控制反应器内温度为30±1℃;反应器内通过厌氧氨氧化菌作用将进水的NH 4 +-N与NO 2 --N转化为N 2;而自养反硝化菌则通过FeS作为电子供体与NO 3 —N反应产生NO 2 --N,出水通过U型出水管溢流排出。
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