CN115403234A - Method for realizing carbon source supplement and sludge reduction based on free nitrite and sulfate - Google Patents
Method for realizing carbon source supplement and sludge reduction based on free nitrite and sulfate Download PDFInfo
- Publication number
- CN115403234A CN115403234A CN202211043327.8A CN202211043327A CN115403234A CN 115403234 A CN115403234 A CN 115403234A CN 202211043327 A CN202211043327 A CN 202211043327A CN 115403234 A CN115403234 A CN 115403234A
- Authority
- CN
- China
- Prior art keywords
- sludge
- sulfate
- nitrite
- carbon source
- free
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000010802 sludge Substances 0.000 title claims abstract description 80
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 39
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 title claims abstract description 36
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 32
- 239000013589 supplement Substances 0.000 title claims description 7
- 239000010865 sewage Substances 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000000855 fermentation Methods 0.000 claims abstract description 15
- 230000004151 fermentation Effects 0.000 claims abstract description 14
- 239000006228 supernatant Substances 0.000 claims abstract description 14
- 230000001502 supplementing effect Effects 0.000 claims abstract description 11
- 238000003756 stirring Methods 0.000 claims abstract description 10
- 238000000926 separation method Methods 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 230000033116 oxidation-reduction process Effects 0.000 claims abstract description 5
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 claims description 16
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 8
- 235000010288 sodium nitrite Nutrition 0.000 claims description 8
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 8
- 235000011152 sodium sulphate Nutrition 0.000 claims description 8
- 238000004062 sedimentation Methods 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 6
- 239000003814 drug Substances 0.000 claims description 3
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 2
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 2
- 239000001110 calcium chloride Substances 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims 2
- 230000001376 precipitating effect Effects 0.000 claims 2
- 238000012258 culturing Methods 0.000 claims 1
- 238000007599 discharging Methods 0.000 claims 1
- 230000003068 static effect Effects 0.000 abstract description 4
- 238000001556 precipitation Methods 0.000 abstract description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 4
- 238000004065 wastewater treatment Methods 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 3
- IOVCWXUNBOPUCH-UHFFFAOYSA-N Nitrous acid Chemical compound ON=O IOVCWXUNBOPUCH-UHFFFAOYSA-N 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 239000010840 domestic wastewater Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000003834 intracellular effect Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 230000007269 microbial metabolism Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000001272 nitrous oxide Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 230000003389 potentiating effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/043—Treatment of partial or bypass streams
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Treatment Of Sludge (AREA)
Abstract
一种基于游离亚硝酸盐和硫酸盐实现补充碳源和污泥减量的方法，涉及污水处理技术领域。本发明的目的是为了解决目前污水处理工艺中存在碳源不足，以及如何同步减少污泥产量的问题。方法：步骤一：向SBR反应器内加入污水和污泥，然后加入游离亚硝酸盐溶液和硫酸盐溶液，在搅拌的同时发酵培养24～26h，并在发酵培养过程中控制氧化还原电位为‑150～‑300mV；步骤二：通过静置沉淀、加药分离或采用叠螺机分离的方式，将发酵培养后的泥水混合物进行分离，分别得到上清液和污泥；将上清液注入到污水处理反应器的前端，污泥直接外排处置。本发明可获得一种基于游离亚硝酸盐和硫酸盐实现补充碳源和污泥减量的方法。
The invention relates to a method for supplementing carbon sources and reducing sludge based on free nitrite and sulfate, which relates to the technical field of sewage treatment. The purpose of the invention is to solve the problem of insufficient carbon source in the current sewage treatment process and how to simultaneously reduce the sludge output. Method: Step 1: Add sewage and sludge into the SBR reactor, then add free nitrite solution and sulfate solution, ferment and cultivate for 24 to 26 hours while stirring, and control the oxidation-reduction potential during the fermentation and cultivation process to - 150～‑300mV; Step 2: Separating the mud-water mixture after fermentation and cultivation by static precipitation, dosing separation or separation by screw stacker to obtain supernatant and sludge respectively; inject the supernatant into At the front end of the sewage treatment reactor, the sludge is directly discharged for disposal. The invention can obtain a method for supplementing carbon source and reducing sludge based on free nitrite and sulfate.
Description
技术领域technical field
本发明涉及污水处理技术领域，具体涉及一种基于游离亚硝酸盐和硫酸盐实现补充碳源和污泥减量的方法。The invention relates to the technical field of sewage treatment, in particular to a method for supplementing carbon sources and reducing sludge based on free nitrite and sulfate.
背景技术Background technique
活性污泥法广泛用于生物废水处理，尽管其去除有机物的效率很高，但同时也会产生大量剩余污泥，必须对其进行处理和处置。然而，污泥处理和处置费用高昂，占废水处理厂(WWTP)总运营成本的60％。因此，有效减少污泥产量正成为研究者和实践者的一大关注。The activated sludge process is widely used in biological wastewater treatment. Although it has high efficiency in removing organic matter, it also produces a large amount of residual sludge, which must be treated and disposed of. However, sludge treatment and disposal are costly, accounting for 60% of the total operating costs of wastewater treatment plants (WWTP). Therefore, effectively reducing sludge production is becoming a major concern of researchers and practitioners.
在过去的几十年中，已经开发了各种污泥还原技术，这些技术可以应用于污泥回流管线，以促进废水处理过程中的污泥降解；也可以用于污泥处理管线，以增强好氧或厌氧消化。污泥回流管线中采用的污泥热、机械、电气和化学处理技术，其中回流/剩余污泥或其一部分经过处理并返回生物反应器进行进一步生物降解。这些方法导致了外膜的崩解细胞聚合物质(EPS)的破坏细菌细胞，使得污泥中细菌的细胞外成分和细胞内成分释放，释放出来的物质在生物反应器中再次被微生物利用，通过新陈代谢有一部分碳源被氧化成CO2，导致整体污泥的生物量减少了25％。目前采用其他的物理方法如超声法减少污泥产量，但该方法处理成本过高。因此，减少污泥的替代方法刻不容缓。Over the past few decades, various sludge reduction technologies have been developed, which can be applied to sludge return lines to promote sludge degradation during wastewater treatment; they can also be used in sludge treatment lines to enhance Aerobic or anaerobic digestion. Sludge thermal, mechanical, electrical and chemical treatment techniques employed in sludge return lines where the return/excess sludge or a portion thereof is treated and returned to a bioreactor for further biodegradation. These methods lead to the destruction of bacterial cells by disintegrating cell polymeric substances (EPS) of the outer membrane, so that the extracellular components and intracellular components of bacteria in the sludge are released, and the released substances are reused by microorganisms in the bioreactor, through A part of the carbon source in the metabolism is oxidized to CO 2 , resulting in a 25% reduction in the overall sludge biomass. At present, other physical methods such as ultrasonic method are used to reduce sludge production, but the treatment cost of this method is too high. Therefore, alternative methods to reduce sludge are urgently needed.
发明内容Contents of the invention
本发明的目的是为了解决目前污水处理工艺中存在碳源不足，以及如何同步减少污泥产量的问题，而提供一种基于游离亚硝酸盐和硫酸盐实现补充碳源和污泥减量的方法。The purpose of the present invention is to provide a method for supplementing carbon sources and sludge reduction based on free nitrite and sulfate in order to solve the problem of insufficient carbon sources in the current sewage treatment process and how to simultaneously reduce sludge production .
一种基于游离亚硝酸盐和硫酸盐实现补充碳源和污泥减量的方法，按以下步骤进行：A method for supplementing carbon sources and sludge reduction based on free nitrite and sulfate, carried out in the following steps:
步骤一：向SBR反应器内加入污水及从二沉池中取出的污泥，然后加入游离亚硝酸盐溶液和硫酸盐溶液，在搅拌的同时发酵培养24～26h，并在发酵培养过程中控制氧化还原电位为-150～-300mV；所述的游离亚硝酸盐溶液中亚硝酸盐的质量、硫酸盐溶液中硫酸盐的质量与污泥的体积的比为20mg：20mg：1L；Step 1: Add sewage and sludge taken out from the secondary sedimentation tank into the SBR reactor, then add free nitrite solution and sulfate solution, ferment and cultivate for 24-26 hours while stirring, and control The oxidation-reduction potential is -150～-300mV; the ratio of the mass of nitrite in the free nitrite solution and the mass of sulfate in the sulfate solution to the volume of the sludge is 20mg:20mg:1L;
步骤二：发酵培养结束后，通过静置沉淀、加药分离或采用叠螺机分离的方式，将发酵培养后的泥水混合物进行分离，分别得到上清液和污泥；将上清液注入到污水处理反应器的前端，污泥直接外排处置。Step 2: After the fermentation and cultivation, the mud-water mixture after fermentation and cultivation is separated by static precipitation, dosing separation or separation by screw stacker to obtain supernatant and sludge respectively; inject the supernatant into At the front end of the sewage treatment reactor, the sludge is directly discharged for disposal.
本发明的原理：Principle of the present invention:
二沉池的污泥，通过加入游离亚硝酸(FNA或HNO2)，可以实现污泥中的微生物细胞生物学破碎，污泥得到分解和部分降解；同时添加的硫酸盐(SO4 2-)在控制厌氧的情况下，使得污泥中的硫酸盐还原菌迅速的生长，进一步的加速污泥的生物破碎和降解，分解后的污泥会解体，释放出碳源和部分氮源，水分子可以通过静沉和加药等方式自动的分离，大部分碳源就会释放到上清液的污水中，然后回流到污水处理的前段，补充污水中的碳源。For the sludge in the secondary sedimentation tank, by adding free nitrous acid (FNA or HNO 2 ), the biological breakdown of microbial cells in the sludge can be achieved, and the sludge is decomposed and partially degraded; at the same time, the added sulfate (SO 4 2- ) Under the control of anaerobic conditions, the rapid growth of sulfate-reducing bacteria in the sludge will further accelerate the biological fragmentation and degradation of the sludge, and the decomposed sludge will disintegrate, releasing carbon sources and some nitrogen sources, water Molecules can be automatically separated by static settling and dosing, and most of the carbon source will be released into the supernatant sewage, and then flow back to the front stage of sewage treatment to supplement the carbon source in the sewage.
本发明的有益效果：Beneficial effects of the present invention:
本发明提出了一种基于游离亚硝酸(FNA或HNO2)和硫酸盐(SO4 2-)处理的新策略来实现减少污泥，具体方法是利用二沉池产生的污泥，取部分污泥在SBR生物反应器中，添加游离亚硝酸盐和硫酸盐，搅拌反应24小时。污泥在反应器内分解形成新的碳源和部分反硝化的氮源，并通过回流的方法回到生物处理工艺的前端，可以为现有的污水处理工艺提供碳源，从而减少碳源的投加量。The present invention proposes a new strategy based on the treatment of free nitrous acid (FNA or HNO 2 ) and sulfate (SO 4 2- ) to reduce sludge. Sludge in the SBR bioreactor, add free nitrite and sulfate, and stir for 24 hours. The sludge decomposes in the reactor to form new carbon sources and partially denitrified nitrogen sources, and returns to the front end of the biological treatment process through the method of reflux, which can provide carbon sources for the existing sewage treatment process, thereby reducing the cost of carbon sources. dosage.
本发明可以解决城市污水碳源不足的问题，同时减少污泥的产量，是解决城市污水碳源不足及污泥减量最有效的方法。The invention can solve the problem of insufficient carbon source of urban sewage and reduce the output of sludge at the same time, and is the most effective method for solving the insufficient carbon source of urban sewage and reducing the amount of sludge.
本发明可获得一种基于游离亚硝酸盐和硫酸盐实现补充碳源和污泥减量的方法。The invention can obtain a method for supplementing carbon source and reducing sludge based on free nitrite and sulfate.
附图说明Description of drawings
图1为本发明一种基于游离亚硝酸盐和硫酸盐实现补充碳源和污泥减量的方法的工艺流程图。Fig. 1 is a process flow diagram of a method for supplementing carbon sources and sludge reduction based on free nitrite and sulfate in the present invention.
具体实施方式Detailed ways
具体实施方式一：本实施方式一种基于游离亚硝酸盐和硫酸盐实现补充碳源和污泥减量的方法，按以下步骤进行：Embodiment 1: In this embodiment, a method for supplementing carbon sources and sludge reduction based on free nitrite and sulfate is carried out according to the following steps:
步骤一：向SBR反应器内加入污水及从二沉池中取出的污泥，然后加入游离亚硝酸盐溶液和硫酸盐溶液，在搅拌的同时发酵培养24～26h，并在发酵培养过程中控制氧化还原电位为-150～-300mV；所述的游离亚硝酸盐溶液中亚硝酸盐的质量、硫酸盐溶液中硫酸盐的质量与污泥的体积的比为20mg：20mg：1L；Step 1: Add sewage and sludge taken out from the secondary sedimentation tank into the SBR reactor, then add free nitrite solution and sulfate solution, ferment and cultivate for 24-26 hours while stirring, and control The oxidation-reduction potential is -150～-300mV; the ratio of the mass of nitrite in the free nitrite solution and the mass of sulfate in the sulfate solution to the volume of the sludge is 20mg:20mg:1L;
步骤二：发酵培养结束后，通过静置沉淀、加药分离或采用叠螺机分离的方式，将发酵培养后的泥水混合物进行分离，分别得到上清液和污泥；将上清液注入到污水处理反应器的前端，污泥直接外排处置。Step 2: After the fermentation and cultivation, the mud-water mixture after fermentation and cultivation is separated by static precipitation, dosing separation or separation by screw stacker to obtain supernatant and sludge respectively; inject the supernatant into At the front end of the sewage treatment reactor, the sludge is directly discharged for disposal.
具体实施方式二：本实施方式与具体实施方式一不同点是：步骤一中污水与污泥的体积比为1：1；所述的污水为处理后的污水或二沉池内的上清液；所述的污泥的浓度为5000～7000mg/L，含水率为80～90％。Embodiment 2: The difference between this embodiment and Embodiment 1 is: the volume ratio of sewage and sludge in step 1 is 1:1; the sewage is treated sewage or the supernatant in the secondary sedimentation tank; The concentration of the sludge is 5000-7000mg/L, and the water content is 80-90%.
其他步骤与具体实施方式一相同。Other steps are the same as in the first embodiment.
具体实施方式三：本实施方式与具体实施方式一或二不同点是：步骤一中游离亚硝酸溶液盐由亚硝酸盐与水混合而成，游离亚硝酸盐溶液的浓度为20～25mg/L、pH为3～5。Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: in step one, free nitrite solution salt is formed by mixing nitrite and water, and the concentration of free nitrite solution is 20～25mg/L , pH is 3-5.
其他步骤与具体实施方式一或二相同。Other steps are the same as those in Embodiment 1 or 2.
具体实施方式四：本实施方式与具体实施方式一至三之一不同点是：所述的游离亚硝酸盐溶液为游离亚硝酸钠溶液。Embodiment 4: This embodiment differs from Embodiment 1 to Embodiment 3 in that: the free nitrite solution is a free sodium nitrite solution.
其他步骤与具体实施方式一至三相同。Other steps are the same as those in Embodiments 1 to 3.
具体实施方式五：本实施方式与具体实施方式一至四之一不同点是：步骤一中硫酸盐溶液由硫酸盐与水混合而成，硫酸盐溶液的浓度为50～55mg/L、pH为3～5。Specific embodiment five: the difference between this embodiment and specific embodiments one to four is: in step 1, the sulfate solution is formed by mixing sulfate and water, the concentration of the sulfate solution is 50～55mg/L, and the pH is 3 ~5.
其他步骤与具体实施方式一至四相同。Other steps are the same as those in Embodiments 1 to 4.
具体实施方式六：本实施方式与具体实施方式一至五之一不同点是：所述的硫酸盐溶液为硫酸钠溶液。Embodiment 6: This embodiment differs from Embodiment 1 to Embodiment 5 in that: the sulfate solution is sodium sulfate solution.
其他步骤与具体实施方式一至五相同。Other steps are the same as those in Embodiments 1 to 5.
具体实施方式七：本实施方式与具体实施方式一至六之一不同点是：步骤一中的搅拌速率为60～120r/min。Embodiment 7: The difference between this embodiment and Embodiment 1 to Embodiment 6 is that the stirring rate in step 1 is 60-120 r/min.
其他步骤与具体实施方式一至六相同。Other steps are the same as those in Embodiments 1 to 6.
具体实施方式八：本实施方式与具体实施方式一至七之一不同点是：步骤一中在25～35℃的温度条件下进行发酵培养。Embodiment 8: This embodiment differs from Embodiments 1 to 7 in that: in step 1, the fermentation culture is carried out at a temperature of 25-35°C.
其他步骤与具体实施方式一至七相同。Other steps are the same as those in Embodiments 1 to 7.
具体实施方式九：本实施方式与具体实施方式一至八之一不同点是：步骤二中静置沉淀的时间为30～35min。Embodiment 9: The difference between this embodiment and Embodiment 1 to Embodiment 8 is that the time for standing and settling in step 2 is 30-35 minutes.
其他步骤与具体实施方式一至八相同。Other steps are the same as those in Embodiments 1 to 8.
具体实施方式十：本实施方式与具体实施方式一至九之一不同点是：步骤二中加药分离的药剂为聚合氯化铝或氯化钙，药剂的添加量为25mg/L。Embodiment 10: The difference between this embodiment and Embodiment 1 to Embodiment 9 is that the medicament to be added and separated in step 2 is polyaluminum chloride or calcium chloride, and the dosage of the medicament is 25 mg/L.
其他步骤与具体实施方式一至九相同。Other steps are the same as those in Embodiments 1 to 9.
采用以下实施例验证本发明的有益效果：Adopt the following examples to verify the beneficial effects of the present invention:
实施例1：一种基于游离亚硝酸盐和硫酸盐实现补充碳源和污泥减量的方法，按以下步骤进行：Embodiment 1: a kind of method based on free nitrite and sulphate realizes supplementary carbon source and sludge reduction, carries out according to the following steps:
步骤一：向SBR反应器内加入污水及从二沉池中取出的污泥(没有经过板框压滤的)，然后加入游离亚硝酸钠溶液和硫酸钠溶液，以120r/min的搅拌速率搅拌的同时，在35℃的温度条件下发酵培养24h，并在发酵培养过程中控制氧化还原电位(ORP)为-200mV，实现厌氧下的发酵和污泥降解，通过SBR反应器密闭，同时由于硫酸盐还原菌的生长消耗氧气，搅拌5个小时左右就会形成厌氧条件。Step 1: Add sewage and sludge taken out from the secondary settling tank (not filtered through plate and frame) into the SBR reactor, then add free sodium nitrite solution and sodium sulfate solution, and stir at a stirring rate of 120r/min At the same time, ferment and cultivate for 24 hours at a temperature of 35°C, and control the oxidation-reduction potential (ORP) to -200mV during the fermentation and culture to achieve anaerobic fermentation and sludge degradation. The SBR reactor is sealed, and at the same time due to The growth of sulfate-reducing bacteria consumes oxygen, and anaerobic conditions will be formed after stirring for about 5 hours.
所述的游离亚硝酸钠溶液中亚硝酸钠的质量、硫酸钠溶液中硫酸钠的质量与污泥的体积的比为20mg：20mg：1L。The ratio of the mass of sodium nitrite in the free sodium nitrite solution and the mass of sodium sulfate in the sodium sulfate solution to the volume of the sludge is 20mg:20mg:1L.
污水与污泥的体积比为1：1；所述的污水为处理后的污水或二沉池内的上清液；所述的污泥的浓度为5000～7000mg/L，含水率为80～90％。The volume ratio of sewage to sludge is 1:1; the sewage is treated sewage or the supernatant in the secondary sedimentation tank; the concentration of the sludge is 5000-7000mg/L, and the water content is 80-90 %.
游离亚硝酸钠溶液由亚硝酸钠与水混合而成，游离亚硝酸钠溶液的浓度为20mg/L、pH为3～5。The free sodium nitrite solution is formed by mixing sodium nitrite and water, the concentration of the free sodium nitrite solution is 20mg/L, and the pH is 3-5.
硫酸钠溶液由硫酸钠与水混合而成，硫酸钠溶液的浓度为50mg/L、pH为3～5。The sodium sulfate solution is formed by mixing sodium sulfate and water, the concentration of the sodium sulfate solution is 50mg/L, and the pH is 3-5.
步骤二：发酵培养结束后，静置沉淀30min，将发酵培养后的泥水混合物进行分离，分别得到上清液和污泥；将上清液注入到污水处理反应器的前端，通常需要测定来水的中碳源的含量，以及要实现末端污水中的总氮和氨氮的去除效果；污泥直接外排处置。Step 2: After the fermentation culture is finished, let it sit for 30 minutes, separate the mud-water mixture after fermentation culture, and obtain the supernatant and sludge respectively; inject the supernatant into the front end of the sewage treatment reactor, and usually need to measure the incoming water The content of the medium carbon source, and the removal effect of total nitrogen and ammonia nitrogen in the terminal sewage; the sludge is directly discharged for disposal.
试验部分：Experimental part:
自由亚硝酸(FNA或HNO2)对参与废水处理的许多关键微生物代谢的抑制作用(ppb)已被充分证明，部分回流/剩余污泥的FNA处理可作为实现污泥减量的策略。为了验证这一可能性，使用两个实验室规模的序批式反应器(SBR)处理合成生活污水。一个是实验反应器，包括一个FNA的加药装置和一个硫酸盐的加药装置，其中SBR反应器中装有50％的剩余污泥；另一个用作对照，同时控制对照和加药的SBR反应器的氧化还原电位在-150mV左右。两个SBR中的MLSS浓度保持在大致相同的水平，并监测和比较了实验和控制系统的污泥产率、污水质量、一氧化二氮(N2O，一种有效的温室气体)排放因子、污泥体积指数(SVI)、污泥的粒度分布和最大活性。采用本实施例方法处理后的污泥，90％左右发生了分解，同时可以回收50％以上的碳源和部分氮源(通常的回收的碳源与氮源的比例为5:1)，能够实现80％的污泥减量。The inhibitory effect (ppb) of free nitrous acid (FNA or HNO 2 ) on many key microbial metabolisms involved in wastewater treatment has been well documented, and FNA treatment of partial return/excess sludge can be used as a strategy to achieve sludge reduction. To test this possibility, two laboratory-scale sequencing batch reactors (SBRs) were used to treat synthetic domestic wastewater. One is the experimental reactor, including a dosing unit for FNA and a dosing unit for sulfate, in which the SBR reactor is filled with 50% of the remaining sludge; the other is used as a control, which controls both the control and the dosing SBR The redox potential of the reactor is around -150mV. MLSS concentrations were maintained at roughly the same level in both SBRs, and the sludge yield, effluent quality, nitrous oxide ( N2O , a potent greenhouse gas) emission factor was monitored and compared for the experimental and control systems , sludge volume index (SVI), particle size distribution and maximum activity of sludge. About 90% of the sludge treated by the method of this embodiment has been decomposed, and more than 50% of the carbon source and part of the nitrogen source can be recovered simultaneously (the ratio of the carbon source and the nitrogen source of the usual recovery is 5:1), which can Achieve 80% sludge reduction.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211043327.8A CN115403234A (en) | 2022-08-29 | 2022-08-29 | Method for realizing carbon source supplement and sludge reduction based on free nitrite and sulfate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211043327.8A CN115403234A (en) | 2022-08-29 | 2022-08-29 | Method for realizing carbon source supplement and sludge reduction based on free nitrite and sulfate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115403234A true CN115403234A (en) | 2022-11-29 |
Family
ID=84161542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211043327.8A Pending CN115403234A (en) | 2022-08-29 | 2022-08-29 | Method for realizing carbon source supplement and sludge reduction based on free nitrite and sulfate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115403234A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106477846A (en) * | 2016-11-25 | 2017-03-08 | 太原理工大学 | Hydrogen the method for reclaiming guanite are produced using free nitrite enhancement microbiological electroplating sludge |
| CN107446961A (en) * | 2017-09-08 | 2017-12-08 | 太原理工大学 | A kind of method that sulfate reducing bacteria converts for mediation reinforcement sludge carbon source |
| CN108217950A (en) * | 2018-03-13 | 2018-06-29 | 北京工业大学 | FNA device and method for strengthening sludge fermentation and realizing short-term denitrification and dephosphorization of sewage |
| CN108328894A (en) * | 2018-03-22 | 2018-07-27 | 湖南大学 | A method of promoting residual sludge reduction |
| CN110386717A (en) * | 2018-04-17 | 2019-10-29 | 香港科技大学 | Sulfate reduction-is aerobic-precipitating-anaerobic system and its technique |
| CN113003716A (en) * | 2021-02-20 | 2021-06-22 | 北京工业大学 | Device and method for synchronously treating nitrite nitrogen wastewater and excess sludge |
-
2022
- 2022-08-29 CN CN202211043327.8A patent/CN115403234A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106477846A (en) * | 2016-11-25 | 2017-03-08 | 太原理工大学 | Hydrogen the method for reclaiming guanite are produced using free nitrite enhancement microbiological electroplating sludge |
| CN107446961A (en) * | 2017-09-08 | 2017-12-08 | 太原理工大学 | A kind of method that sulfate reducing bacteria converts for mediation reinforcement sludge carbon source |
| CN108217950A (en) * | 2018-03-13 | 2018-06-29 | 北京工业大学 | FNA device and method for strengthening sludge fermentation and realizing short-term denitrification and dephosphorization of sewage |
| CN108328894A (en) * | 2018-03-22 | 2018-07-27 | 湖南大学 | A method of promoting residual sludge reduction |
| CN110386717A (en) * | 2018-04-17 | 2019-10-29 | 香港科技大学 | Sulfate reduction-is aerobic-precipitating-anaerobic system and its technique |
| CN113003716A (en) * | 2021-02-20 | 2021-06-22 | 北京工业大学 | Device and method for synchronously treating nitrite nitrogen wastewater and excess sludge |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105417687B (en) | The method and apparatus of sewage and bed mud in a kind of Combined Treatment black-odor riverway | |
| CN101050026A (en) | Deepness denitrogenation method for treating organic wastewater in high concentration | |
| CN109485149B (en) | Device and method for realizing advanced denitrification and excess sludge reduction of late landfill leachate | |
| CN101967029B (en) | Method for treating ammonia nitrogen in garbage percolate by combining biological and chemical processes | |
| Wang et al. | Response characteristics of nitrifying bacteria and archaea community involved in nitrogen removal and bioelectricity generation in integrated tidal flow constructed wetland-microbial fuel cell | |
| Hu et al. | Start-up and maintenance of indigenous microalgae-bacteria consortium treating toilet wastewater through partial nitrification and nitrite-type denitrification | |
| CN108298771A (en) | A kind of pig farm refuse processing method | |
| Hou et al. | Response of nitrite accumulation to elevated C/NO–3-N ratio during partial denitrification process: Insights of extracellular polymeric substance, microbial community and metabolic function | |
| CN102060423A (en) | Method for acquiring denitrified carbon source by fermenting surplus sludge | |
| CN105541008A (en) | An efficient denitrifying and carbon-removing device for culture wastewater anaerobic biogas slurry with a low C/N ratio and a process thereof | |
| Wen et al. | Micro-aerated fermentation enhances acetate production from high-rate activated sludge to supply carbon source for heterotrophic denitratation | |
| CN101054250A (en) | Technique for treating garbage percolate by combinated physicochemistry and organism bacterium | |
| CN103601347B (en) | A treatment method for domestic sewage and a quick start-up method for UAFB-EGSB coupling system | |
| CN108862840A (en) | A kind of modified form A2The sewage disposal system of O technique | |
| CN112047468A (en) | Biochemical treatment method of landfill leachate | |
| CN102001800A (en) | Method for purifying wastewater containing organosilicon | |
| CN104843870B (en) | Magnetic carrier immobilized microorganism live bacteria preparation and preparation method and application thereof | |
| CN102344221A (en) | Process for treating high-salinity high-ammonia-nitrogen organic waste water | |
| CN108483821B (en) | High-efficiency denitrification process for municipal sewage by taking nitrosation-anaerobic ammonia oxidation as core | |
| CN111675426B (en) | A kind of polyurethane sewage treatment system and method using composite bacterial agent | |
| CN100417604C (en) | Full biochemical treatment method for nitrobenzene wastewater or aniline wastewater or their mixed wastewater | |
| Li et al. | Effects of aeration coupled with microbial fuel cell on nitrogen removal and electricity production for biogas slurry | |
| JP5536894B2 (en) | Digestion method of excess sludge by lack of normal time | |
| CN118307150A (en) | Treatment method of fresh coffee fruit processing wastewater | |
| CN205368029U (en) | Breed low CN of waste water and remove carbon processing apparatus than high -efficient denitrogenation of anaerobism natural pond liquid |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20221129 |