WO2009094855A1 - A wastewater treatment method - Google Patents
A wastewater treatment method Download PDFInfo
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- WO2009094855A1 WO2009094855A1 PCT/CN2008/070164 CN2008070164W WO2009094855A1 WO 2009094855 A1 WO2009094855 A1 WO 2009094855A1 CN 2008070164 W CN2008070164 W CN 2008070164W WO 2009094855 A1 WO2009094855 A1 WO 2009094855A1
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- treatment
- sewage
- excess sludge
- sludge
- anoxic
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- 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
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/34—Treatment of water, waste water, or sewage with mechanical oscillations
- C02F1/36—Treatment of water, waste water, or sewage with mechanical oscillations ultrasonic vibrations
Definitions
- the present invention relates to a sewage treatment method and its use, in particular to a sewage treatment method for treating excess sludge by ultrasonic waves and uses thereof.
- the excess sludge is usually treated with ultrasonic waves to improve the biodegradability of excess sludge, reduce sludge discharge and increase biogas.
- the excess sludge produced in the biological section of the sewage plant is treated by a certain ultrasonic device, and an ultrasonic field is generated in the excess sludge to achieve two purposes: First, the microbial cells in the excess sludge are broken and released. Intracellular substances such as carbon sources and biological enzymes; the second is: the conversion of some long-chain molecules in the sludge and other refractory substances into easily degradable substances, thereby improving the biodegradability of the sludge.
- the sonicated sludge can be added or returned as a carbon source and catalyst to the anoxic or anaerobic zone of the wastewater treatment biological process to enhance biological nitrogen removal and improve biological nitrogen removal and biological phosphorus removal efficiency.
- the object of the present invention is to provide a sewage treatment method and use thereof, which utilizes low-frequency ultrasonic waves to generate a strong cavitation effect in excess sludge to treat excess sludge, thereby causing microbial cells in the excess sludge to be broken and released.
- Substance substances such as carbon sources and biological enzymes are extracted, and the treated excess sludge is returned to the anoxic zone or the anaerobic zone of the sewage treatment to further promote nitrogen removal and phosphorus removal.
- the amount of excess sludge to be treated depends on the influent water quality, treatment process, sludge characteristics, etc., and may be part or all of the excess sludge.
- a sewage treatment method wherein: the excess sludge having a water content of 90-99.9% is subjected to ultrasonic treatment at a frequency of 20-100 kHz and a power density of 30-180 watts/liter for 5 to 200 seconds. After that, the above excess sludge, which accounts for 0. 05-10% of the total amount of sewage, is returned to the anoxic treatment or anaerobic treatment of the sewage, and the reaction time is maintained for 10 minutes to 6 hours, so that the total amount of the treated sewage is 5 ⁇ ;
- the nitrogen concentration and the total phosphorus concentration are 5-15 mg / liter and 0. 1-1. 5 mg / liter;
- a sewage treatment method comprising: anoxic treatment, aerobic treatment and sedimentation treatment of the sewage, and the supernatant and the excess sludge are obtained after the precipitation treatment, and the remaining sludge is concentrated to obtain a water content of 90%. -99. 9% of excess sludge, and the ultrasonically treated excess sludge is returned to the anoxic treatment;
- a sewage treatment method of the present invention wherein: it comprises: anoxic treatment of sewage, anaerobic treatment, aerobic treatment, and After the precipitation treatment, the supernatant and the excess sludge are obtained after the precipitation treatment, and the remaining sludge is concentrated to obtain the excess sludge having a water content of 90-99.9%, and the ultrasonically treated excess sludge is returned to the anoxic treatment or Anaerobic treatment;
- a sewage treatment method comprising: anaerobic treatment of sewage, anoxic treatment, aerobic treatment and precipitation treatment, and supernatant and excess sludge are obtained after precipitation treatment, and the remaining sludge is concentrated after treatment The excess sludge having a moisture content of 90-99.9% is obtained, and the ultrasonically treated excess sludge is returned to the anoxic treatment or the anaerobic treatment;
- a sewage treatment method comprising: aerobic treatment, anoxic treatment and sedimentation treatment of the sewage, and the supernatant and the excess sludge are obtained after the precipitation treatment, and the remaining sludge is concentrated to obtain a water content of 90%. -99. 9% of excess sludge, and the ultrasonically treated excess sludge is returned to the anoxic treatment;
- a sewage treatment method comprising: anaerobic treatment, aerobic treatment, anoxic treatment and sedimentation treatment of the sewage, and the supernatant and the excess sludge are obtained after the precipitation treatment, and the remaining sludge is concentrated after being treated.
- the excess sludge having a moisture content of 90-99.9% is obtained, and the excess sludge treated by ultrasonication is returned to the anaerobic treatment;
- a sewage treatment method wherein: the viscosity coefficient of the excess sludge entering the ultrasonic treatment is not more than 1 ⁇ 0 PaS ;
- a sewage treatment method wherein: the ultrasonic wave treats the remaining sludge once or performs multiple treatments;
- a sewage treatment method wherein: the ultrasonic treatment is a sequential batch or a continuous type;
- the invention relates to a sewage treatment method, wherein: the method is used for anaerobic anoxic aerobic process, anoxic anaerobic aerobic process, adsorption biodegradation process, anaerobic/aerobic process, aerobic/anaerobic Process, Carrousel process, batch aerated activated sludge process or University of Cape Town process; this method is also used in membrane bioreactors, monolithic reactors, circulating activated sludge systems, continuous batch reactors Or the use of oxidation ditch.
- the present invention has the following advantages over the prior art: Ultrasonic treatment of part or all of the excess sludge to provide the carbon source and biological enzyme required for the anoxic zone or the anaerobic zone; the carbon source produced by this method can be replaced Additional carbon sources such as methanol can achieve high removal rates of total nitrogen and nitrate nitrogen. In addition to strengthening biological nitrogen removal and biological phosphorus removal, it also reduces sludge production, improves sludge dewatering performance, and improves sludge ore. The effect of the degree.
- FIG. 1 is a schematic view of a sewage treatment method according to a first embodiment of the present invention
- FIG. 2 is a schematic view of a sewage treatment method according to a second embodiment of the present invention.
- FIG. 3 is a schematic view of a sewage treatment method according to a third embodiment of the present invention.
- Figure 4 is a schematic view showing a sewage treatment method according to a fourth embodiment of the present invention.
- Fig. 5 is a schematic view showing a sewage treatment method according to a fifth embodiment of the present invention. detailed description
- a sewage treatment method of the present invention comprises: sewage treatment by anoxic treatment 1, aerobic treatment 2 and precipitation treatment 3, and after the precipitation treatment 3, a supernatant liquid and excess sludge are obtained, and the above sludge is obtained.
- 30-60% after concentration treatment 4 the water content is 90-99.9%, and the treatment of municipal sewage is preferably 93-97%, for example 95%.
- ultrasonic treatment 5 having a frequency of 20-100 kHz and a power density of 30-180 watts/liter, for example, a power of 80 kHz and a volume of 29 liters is
- the 5000 watt ultrasonic equipment treats the above excess sludge having a water content of 95% for 120 seconds, and then returns the total amount of the sewage to 0. 05-10%, for example, 1% of the total amount of the sewage is returned to the anoxic treatment. 1-1.
- the total nitrogen concentration in the treated sewage is 5-15 mg / liter and the total phosphorus concentration is 0. 1-1.
- the viscosity of the remaining sludge in the ultrasonic treatment 5 is not more than 1. 0 PaS, preferably not more than 0. 5PaS.
- the ultrasonic wave treats the excess sludge once or multiple times, that is, the excess sludge enters the ultrasonic generator for processing multiple times, and the ultrasonic treatment 5 may be a sequential batch or a continuous type.
- the excess sludge treated may be the self-produced sludge of the sewage plant or the excess sludge produced by other sewage plants; the amount of excess sludge treated and the degree of treatment depend on the influent water quality of the sewage plant, the degree of nitrification of ammonia nitrogen, and The target value of nitrogen and phosphorus removal.
- the second embodiment is basically the same as the first embodiment, except that: as shown in FIG. 2, a sewage treatment method of the present invention includes: anoxic treatment of sewage 1, anaerobic treatment 6, aerobic treatment 2, and Precipitation treatment 3, after the precipitation treatment 3, the supernatant liquid and the excess sludge are obtained, and the remaining sludge is concentrated to obtain 90-99.9% of the excess sludge, and the ultrasonically treated excess sludge is returned to the anoxic treatment 1 Or anaerobic treatment in 6.
- the dosing point of the ultrasonically treated excess sludge may be selected in the anoxic treatment 1 or the anaerobic treatment 6 according to the different points of denitrification and phosphorus removal, and FIG. 2 is only drawn into the anoxic treatment 1 and added. The situation can be analogized to the case of anaerobic treatment 6.
- the third embodiment is basically the same as the first embodiment, except that: as shown in FIG. 3, a sewage treatment method of the present invention includes: anaerobic treatment of sewage 6, anoxic treatment 1, aerobic treatment 2, and Precipitation treatment 3, after the precipitation treatment 3, the supernatant liquid and the excess sludge are obtained, and the remaining sludge is concentrated to obtain 90-99.9% of the excess sludge, and the ultrasonically treated excess sludge is returned to the anoxic treatment 1 Or anaerobic treatment in 6.
- the dosing point of the ultrasonically treated excess sludge may be selected in the anoxic treatment 1 or the anaerobic treatment 6 according to the different points of denitrification and phosphorus removal, and FIG. 3 is only drawn into the anoxic treatment 1 and added. The situation can be analogized to the case of anaerobic treatment 6.
- the fourth embodiment is basically the same as the first embodiment, except that: as shown in FIG. 4, a sewage treatment method of the present invention includes: aerobic treatment of sewage, anoxic treatment 1 and precipitation treatment 3, precipitation After the treatment, the supernatant and the excess sludge were obtained, and the remaining sludge was subjected to concentration treatment to obtain 90-99.9% of the excess sludge, and the ultrasonically treated excess sludge was returned to the anoxic treatment 1.
- a sewage treatment method of the present invention includes: anaerobic treatment of sewage 6, aerobic treatment 2, anoxic treatment 1 and Precipitation treatment 3, after the precipitation treatment 3, the supernatant liquid and the excess sludge are obtained, and the remaining sludge is concentrated to obtain 90-99.9% of the excess sludge, and the ultrasonically treated excess sludge is returned to the anaerobic treatment 6 in.
- the sewage treatment method of the present invention can be used to strengthen biological nitrogen removal and phosphorus removal, including but not limited to the following processes: Oxygen-anoxic aerobic process (A 2 0), anoxic anaerobic aerobic process (inverted A 2 0), adsorption biodegradation process (AB), anaerobic/aerobic process (A/0), aerobic/anagae Oxygen process (A/0), Carrousel process, batch aerated activated sludge process (ICEAS) or University of Cape Town process (UCT); this method is also used in membrane bioreactors (MBR) , the use of integrated reactor (UNITANK), circulating activated sludge system (CASS / CAST), continuous batch reactor (SBR) or oxidation ditch, aeration arrangements and methods should meet the requirements of nitrogen and phosphorus removal.
- Oxygen-anoxic aerobic process A 2 0
- anoxic anaerobic aerobic process inverted A 2 0
- AB a
- the method of the invention can be used for the treatment of municipal sewage and industrial sewage.
- the invention provides a sewage treatment method and a use thereof, which are widely used for urban sewage and industrial sewage treatment. It uses low-frequency ultrasonic waves to generate strong cavitation in the excess sludge to treat the excess sludge, causing the microbial cells in the excess sludge to break, releasing substances such as carbon sources and biological enzymes, and processing them.
- the remaining sludge is returned to the anoxic zone or anaerobic zone of the sewage treatment to further promote nitrogen and phosphorus removal, and can reduce sludge production, improve sludge dewatering performance and increase sludge mineralization. effect.
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Abstract
A wastewater treatment method, comprises returning the excess sludge after ultrasonic treatment (5) to the anoxic treatment (1) or anaerobic treatment (6), for providing the required carbon source and biologic enzyme for anoxic zone or anaerobic zone.
Description
污水处理方法及其用途 技术领域 Sewage treatment method and its use
本发明涉及了一种污水处理方法及其用途， 特别是用超声波处理剩余污泥的污水处理方 法及其用途。 The present invention relates to a sewage treatment method and its use, in particular to a sewage treatment method for treating excess sludge by ultrasonic waves and uses thereof.
背景技术 Background technique
目前， 在污水处理工艺中， 通常用超声波对剩余污泥进行处理， 以改善剩余污泥的可生 化性、 减少污泥的排量和增加沼气。 At present, in the sewage treatment process, the excess sludge is usually treated with ultrasonic waves to improve the biodegradability of excess sludge, reduce sludge discharge and increase biogas.
目前， 研究发现， 利用低频超声波能够在介质中产生强烈的成穴作用 （或叫空穴作用、 气穴作用等， 英文 cavitation) 。 利用这个特性， 通过一定的超声波设备处理污水厂生物工 段所产剩余污泥， 在剩余污泥中产生超声场来实现两个目的： 其一是： 将剩余污泥中的微生 物细胞击破， 释放出胞内物质如碳源和生物酶等有用物质； 其二是： 将污泥中部分长链分子 以及其它难降解物质转化为易降解物质， 从而改善污泥的可生化性。 经过超声波处理的污泥 可以作为碳源和催化剂投加或回流到有关污水处理生物工艺的缺氧区或厌氧区， 强化生物脱 氮， 提高生物脱氮和生物除磷的效率。 At present, the study found that the use of low-frequency ultrasound can produce strong cavitation in the medium (or cavitation, cavitation, etc.). Using this feature, the excess sludge produced in the biological section of the sewage plant is treated by a certain ultrasonic device, and an ultrasonic field is generated in the excess sludge to achieve two purposes: First, the microbial cells in the excess sludge are broken and released. Intracellular substances such as carbon sources and biological enzymes; the second is: the conversion of some long-chain molecules in the sludge and other refractory substances into easily degradable substances, thereby improving the biodegradability of the sludge. The sonicated sludge can be added or returned as a carbon source and catalyst to the anoxic or anaerobic zone of the wastewater treatment biological process to enhance biological nitrogen removal and improve biological nitrogen removal and biological phosphorus removal efficiency.
发明内容 Summary of the invention
本发明的发明目的在于： 提供一种污水处理方法及其用途， 它利用低频超声波能够在剩 余污泥中产生强烈的成穴作用来处理剩余污泥， 使得剩余污泥中的微生物细胞击破， 释放出 细胞内物质如碳源和生物酶等有用物质， 并且将处理后的剩余污泥返回到污水处理的缺氧区 或厌氧区中， 来进一步促进脱氮和除磷。 所处理的剩余污泥量取决于进水水质、 处理工艺、 污泥特性等， 可以是部分或全部剩余污泥。 The object of the present invention is to provide a sewage treatment method and use thereof, which utilizes low-frequency ultrasonic waves to generate a strong cavitation effect in excess sludge to treat excess sludge, thereby causing microbial cells in the excess sludge to be broken and released. Substance substances such as carbon sources and biological enzymes are extracted, and the treated excess sludge is returned to the anoxic zone or the anaerobic zone of the sewage treatment to further promote nitrogen removal and phosphorus removal. The amount of excess sludge to be treated depends on the influent water quality, treatment process, sludge characteristics, etc., and may be part or all of the excess sludge.
为了实现本发明的发明目的， 本发明采用以下方式实现： In order to achieve the object of the invention, the invention is achieved in the following manner:
本发明的一种污水处理方法，其中：将含水率为 90-99. 9%的剩余污泥经过频率为 20-100 千赫兹、功率密度为 30-180瓦 /升的超声波处理 5-200秒后， 将占污水总量 0. 05-10%的上述 剩余污泥返回到污水的缺氧处理或厌氧处理中， 并维持 10分钟至 6小时的反应时间， 使得 处理后的污水中的总氮浓度和总磷浓度分别为 5-15毫克 /升和 0. 1-1. 5毫克 /升； A sewage treatment method according to the present invention, wherein: the excess sludge having a water content of 90-99.9% is subjected to ultrasonic treatment at a frequency of 20-100 kHz and a power density of 30-180 watts/liter for 5 to 200 seconds. After that, the above excess sludge, which accounts for 0. 05-10% of the total amount of sewage, is returned to the anoxic treatment or anaerobic treatment of the sewage, and the reaction time is maintained for 10 minutes to 6 hours, so that the total amount of the treated sewage is 5毫米每升; The nitrogen concentration and the total phosphorus concentration are 5-15 mg / liter and 0. 1-1. 5 mg / liter;
本发明的一种污水处理方法， 其中： 它包括： 污水的缺氧处理、 好氧处理和沉淀处理， 沉淀处理后得到上清液和剩余污泥， 剩余污泥经浓缩处理后得到含水率 90-99. 9%的剩余污 泥， 用超声波处理过的剩余污泥返回到缺氧处理中； A sewage treatment method according to the present invention, wherein: the method comprises: anoxic treatment, aerobic treatment and sedimentation treatment of the sewage, and the supernatant and the excess sludge are obtained after the precipitation treatment, and the remaining sludge is concentrated to obtain a water content of 90%. -99. 9% of excess sludge, and the ultrasonically treated excess sludge is returned to the anoxic treatment;
本发明的一种污水处理方法， 其中： 它包括： 污水的缺氧处理、 厌氧处理、 好氧处理和
沉淀处理， 沉淀处理后得到上清液和剩余污泥， 剩余污泥经浓缩处理后得到含水率 90-99. 9% 的剩余污泥， 用超声波处理过的剩余污泥返回到缺氧处理或厌氧处理中； A sewage treatment method of the present invention, wherein: it comprises: anoxic treatment of sewage, anaerobic treatment, aerobic treatment, and After the precipitation treatment, the supernatant and the excess sludge are obtained after the precipitation treatment, and the remaining sludge is concentrated to obtain the excess sludge having a water content of 90-99.9%, and the ultrasonically treated excess sludge is returned to the anoxic treatment or Anaerobic treatment;
本发明的一种污水处理方法， 其中： 它包括： 污水的厌氧处理、 缺氧处理、 好氧处理和 沉淀处理， 沉淀处理后得到上清液和剩余污泥， 剩余污泥经浓缩处理后得到含水率 90-99. 9% 的剩余污泥， 用超声波处理过的剩余污泥返回到缺氧处理或厌氧处理中； A sewage treatment method according to the present invention, wherein: the method comprises: anaerobic treatment of sewage, anoxic treatment, aerobic treatment and precipitation treatment, and supernatant and excess sludge are obtained after precipitation treatment, and the remaining sludge is concentrated after treatment The excess sludge having a moisture content of 90-99.9% is obtained, and the ultrasonically treated excess sludge is returned to the anoxic treatment or the anaerobic treatment;
本发明的一种污水处理方法， 其中： 它包括： 污水的好氧处理、 缺氧处理和沉淀处理， 沉淀处理后得到上清液和剩余污泥， 剩余污泥经浓缩处理后得到含水率 90-99. 9%的剩余污 泥， 用超声波处理过的剩余污泥返回到缺氧处理中； A sewage treatment method according to the present invention, wherein: the method comprises: aerobic treatment, anoxic treatment and sedimentation treatment of the sewage, and the supernatant and the excess sludge are obtained after the precipitation treatment, and the remaining sludge is concentrated to obtain a water content of 90%. -99. 9% of excess sludge, and the ultrasonically treated excess sludge is returned to the anoxic treatment;
本发明的一种污水处理方法， 其中： 它包括： 污水的厌氧处理、 好氧处理、 缺氧处理和 沉淀处理， 沉淀处理后得到上清液和剩余污泥， 剩余污泥经浓缩处理后得到含水率 90-99. 9% 的剩余污泥， 用超声波处理过的剩余污泥返回到厌氧处理中； A sewage treatment method according to the present invention, wherein: the method comprises: anaerobic treatment, aerobic treatment, anoxic treatment and sedimentation treatment of the sewage, and the supernatant and the excess sludge are obtained after the precipitation treatment, and the remaining sludge is concentrated after being treated. The excess sludge having a moisture content of 90-99.9% is obtained, and the excess sludge treated by ultrasonication is returned to the anaerobic treatment;
本发明的一种污水处理方法， 其中： 所述进入超声波处理中的剩余污泥的粘滞系数不大 于 1· 0 PaS; A sewage treatment method according to the present invention, wherein: the viscosity coefficient of the excess sludge entering the ultrasonic treatment is not more than 1·0 PaS ;
本发明的一种污水处理方法， 其中： 所述超声波对剩余污泥进行一次处理或进行多次处 理； A sewage treatment method according to the present invention, wherein: the ultrasonic wave treats the remaining sludge once or performs multiple treatments;
本发明的一种污水处理方法， 其中： 所述超声波处理为序批式或连续式； A sewage treatment method according to the present invention, wherein: the ultrasonic treatment is a sequential batch or a continuous type;
本发明的一种污水处理方法的用途， 其中： 该方法用于厌氧缺氧好氧工艺、 缺氧厌氧好 氧工艺、 吸附生物降解工艺、 厌氧 /好氧工艺、 好氧 /厌氧工艺、 卡鲁塞尔工艺、 间歇式曝气 活性污泥工艺或开普顿大学工艺； 该方法还用于膜生物反应器、 整体式反应器、 循环式活性 污泥系统、 续批式反应器或氧化沟的使用。 The invention relates to a sewage treatment method, wherein: the method is used for anaerobic anoxic aerobic process, anoxic anaerobic aerobic process, adsorption biodegradation process, anaerobic/aerobic process, aerobic/anaerobic Process, Carrousel process, batch aerated activated sludge process or University of Cape Town process; this method is also used in membrane bioreactors, monolithic reactors, circulating activated sludge systems, continuous batch reactors Or the use of oxidation ditch.
本发明与现有技术相比具有以下优点： 利用超声波处理部分或全部剩余污泥， 以提供缺 氧区或厌氧区所需要的碳源和生物酶； 通过这种方法产生的碳源可以代替甲醇等外加碳源， 可以取得很高的总氮和硝态氮的去除率， 在强化生物脱氮和生物除磷的同时， 还有减少污泥 产量、 改善污泥脱水性能以及提高污泥矿化程度的效果。 The present invention has the following advantages over the prior art: Ultrasonic treatment of part or all of the excess sludge to provide the carbon source and biological enzyme required for the anoxic zone or the anaerobic zone; the carbon source produced by this method can be replaced Additional carbon sources such as methanol can achieve high removal rates of total nitrogen and nitrate nitrogen. In addition to strengthening biological nitrogen removal and biological phosphorus removal, it also reduces sludge production, improves sludge dewatering performance, and improves sludge ore. The effect of the degree.
附图说明 DRAWINGS
图 1为本发明第一个实施例的一种污水处理方法的示意图； 1 is a schematic view of a sewage treatment method according to a first embodiment of the present invention;
图 2为本发明第二个实施例的一种污水处理方法的示意图； 2 is a schematic view of a sewage treatment method according to a second embodiment of the present invention;
图 3为本发明第三个实施例的一种污水处理方法的示意图； 3 is a schematic view of a sewage treatment method according to a third embodiment of the present invention;
图 4为本发明第四个实施例的一种污水处理方法的示意图； Figure 4 is a schematic view showing a sewage treatment method according to a fourth embodiment of the present invention;
图 5为本发明第五个实施例的一种污水处理方法的示意图。
具体实施方式 Fig. 5 is a schematic view showing a sewage treatment method according to a fifth embodiment of the present invention. detailed description
第一实施例 First embodiment
如图 1所示， 本发明的一种污水处理方法包括： 污水进行缺氧处理 1、 好氧处理 2和沉 淀处理 3， 沉淀处理 3后得到上清液和剩余污泥， 上述剩余污泥的 30-60%经过浓缩处理 4后 使得其含水率为 90-99. 9%， 对城市污水的处理最好为 93— 97 %， 例如 95 %。 然后根据实际 需要， 经过频率为 20-100千赫兹、功率密度为 30-180瓦 /升的超声波处理 5进行处理 5-200 秒后， 例如将频率为 80千赫兹、 容积是 29升的功率为 5000瓦的超声波设备处理上述含水 率为 95 %的剩余污泥 120秒， 然后将占污水总量 0. 05-10%, 例如占污水总量的 1 %的上述剩 余污泥返回到缺氧处理 1中， 并维持 10分钟至 6小时的反应时间， 例如维持 2小时的反应 时间， 使得处理后的污水中的总氮浓度为 5-15毫克 /升和总磷浓度为 0. 1-1. 5毫克 /升， 例 如总氮浓度控制在 10毫克 /升左右和总磷浓度为 1毫克 /升左右。 进入超声波处理 5中的剩余污泥的粘度不大于 1. 0 PaS, 最好不大于 0. 5PaS。 所述超声 波对剩余污泥进行一次处理或进行多次处理， 即剩余污泥多次进入超声波发生器进行处理， 超声波处理 5可以为序批式或连续式。 所处理的剩余污泥可以是污水厂自产污泥， 也可以是 其它污水厂所产剩余污泥； 所处理的剩余污泥量和处理程度取决于污水厂进水水质、 氨氮的 硝化程度以及脱氮除磷的目标值。 As shown in FIG. 1, a sewage treatment method of the present invention comprises: sewage treatment by anoxic treatment 1, aerobic treatment 2 and precipitation treatment 3, and after the precipitation treatment 3, a supernatant liquid and excess sludge are obtained, and the above sludge is obtained. 30-60% after concentration treatment 4, the water content is 90-99.9%, and the treatment of municipal sewage is preferably 93-97%, for example 95%. Then, according to actual needs, after 5 to 200 seconds of ultrasonic treatment 5 having a frequency of 20-100 kHz and a power density of 30-180 watts/liter, for example, a power of 80 kHz and a volume of 29 liters is The 5000 watt ultrasonic equipment treats the above excess sludge having a water content of 95% for 120 seconds, and then returns the total amount of the sewage to 0. 05-10%, for example, 1% of the total amount of the sewage is returned to the anoxic treatment. 1-1. The total nitrogen concentration in the treated sewage is 5-15 mg / liter and the total phosphorus concentration is 0. 1-1. 5 mg / liter, for example, the total nitrogen concentration is controlled at about 10 mg / liter and the total phosphorus concentration is about 1 mg / liter. 5Pa斯。 The viscosity of the remaining sludge in the ultrasonic treatment 5 is not more than 1. 0 PaS, preferably not more than 0. 5PaS. The ultrasonic wave treats the excess sludge once or multiple times, that is, the excess sludge enters the ultrasonic generator for processing multiple times, and the ultrasonic treatment 5 may be a sequential batch or a continuous type. The excess sludge treated may be the self-produced sludge of the sewage plant or the excess sludge produced by other sewage plants; the amount of excess sludge treated and the degree of treatment depend on the influent water quality of the sewage plant, the degree of nitrification of ammonia nitrogen, and The target value of nitrogen and phosphorus removal.
第二实施例 Second embodiment
第二实施例与第一实施例基本相同， 所不同的是： 如图 2所示， 本发明的一种污水处理 方法包括： 污水的缺氧处理 1、 厌氧处理 6、 好氧处理 2和沉淀处理 3， 沉淀处理 3后得到上 清液和剩余污泥， 剩余污泥经浓缩处理后得到 90-99. 9%的剩余污泥， 用超声波处理过的剩余 污泥返回到缺氧处理 1或厌氧处理 6中。 超声波处理过的剩余污泥的投加点可根据脱氮和除 磷侧重点不同分别选在缺氧处理 1或厌氧处理 6中， 图 2只画出投加到缺氧处理 1中， 投加 到厌氧处理 6中情况与之可类比。 The second embodiment is basically the same as the first embodiment, except that: as shown in FIG. 2, a sewage treatment method of the present invention includes: anoxic treatment of sewage 1, anaerobic treatment 6, aerobic treatment 2, and Precipitation treatment 3, after the precipitation treatment 3, the supernatant liquid and the excess sludge are obtained, and the remaining sludge is concentrated to obtain 90-99.9% of the excess sludge, and the ultrasonically treated excess sludge is returned to the anoxic treatment 1 Or anaerobic treatment in 6. The dosing point of the ultrasonically treated excess sludge may be selected in the anoxic treatment 1 or the anaerobic treatment 6 according to the different points of denitrification and phosphorus removal, and FIG. 2 is only drawn into the anoxic treatment 1 and added. The situation can be analogized to the case of anaerobic treatment 6.
第三实施例 Third embodiment
第三实施例与第一实施例基本相同， 所不同的是： 如图 3所示， 本发明的一种污水处理 方法包括： 污水的厌氧处理 6、 缺氧处理 1、 好氧处理 2和沉淀处理 3， 沉淀处理 3后得到上 清液和剩余污泥， 剩余污泥经浓缩处理后得到 90-99. 9%的剩余污泥， 用超声波处理过的剩余 污泥返回到缺氧处理 1或厌氧处理 6中。 超声波处理过的剩余污泥的投加点可根据脱氮和除 磷侧重点不同分别选在缺氧处理 1或厌氧处理 6中， 图 3只画出投加到缺氧处理 1中， 投加 到厌氧处理 6中情况与之可类比。
第四实施例 The third embodiment is basically the same as the first embodiment, except that: as shown in FIG. 3, a sewage treatment method of the present invention includes: anaerobic treatment of sewage 6, anoxic treatment 1, aerobic treatment 2, and Precipitation treatment 3, after the precipitation treatment 3, the supernatant liquid and the excess sludge are obtained, and the remaining sludge is concentrated to obtain 90-99.9% of the excess sludge, and the ultrasonically treated excess sludge is returned to the anoxic treatment 1 Or anaerobic treatment in 6. The dosing point of the ultrasonically treated excess sludge may be selected in the anoxic treatment 1 or the anaerobic treatment 6 according to the different points of denitrification and phosphorus removal, and FIG. 3 is only drawn into the anoxic treatment 1 and added. The situation can be analogized to the case of anaerobic treatment 6. Fourth embodiment
第四实施例与第一实施例基本相同， 所不同的是： 如图 4所示， 本发明的一种污水处理 方法包括： 污水的好氧处理 2、 缺氧处理 1和沉淀处理 3， 沉淀处理 3后得到上清液和剩余 污泥， 剩余污泥经浓缩处理后得到 90-99. 9%的剩余污泥， 用超声波处理过的剩余污泥返回到 缺氧处理 1中。 The fourth embodiment is basically the same as the first embodiment, except that: as shown in FIG. 4, a sewage treatment method of the present invention includes: aerobic treatment of sewage, anoxic treatment 1 and precipitation treatment 3, precipitation After the treatment, the supernatant and the excess sludge were obtained, and the remaining sludge was subjected to concentration treatment to obtain 90-99.9% of the excess sludge, and the ultrasonically treated excess sludge was returned to the anoxic treatment 1.
第五实施例 Fifth embodiment
第五实施例与第一实施例基本相同， 所不同的是： 如图 5所示， 本发明的一种污水处理 方法包括： 污水的厌氧处理 6、 好氧处理 2、 缺氧处理 1和沉淀处理 3， 沉淀处理 3后得到上 清液和剩余污泥， 剩余污泥经浓缩处理后得到 90-99. 9%的剩余污泥， 用超声波处理过的剩余 污泥返回到厌氧处理 6中。 The fifth embodiment is basically the same as the first embodiment, and the difference is as follows: As shown in FIG. 5, a sewage treatment method of the present invention includes: anaerobic treatment of sewage 6, aerobic treatment 2, anoxic treatment 1 and Precipitation treatment 3, after the precipitation treatment 3, the supernatant liquid and the excess sludge are obtained, and the remaining sludge is concentrated to obtain 90-99.9% of the excess sludge, and the ultrasonically treated excess sludge is returned to the anaerobic treatment 6 in.
对于生物工艺污水厂， 只要整个处理流程中具有生物脱氮和生物除磷的工段或环节， 皆 可以使用本发明的污水处理方法来强化生物脱氮和除磷， 包括但不限于以下工艺： 厌氧缺氧 好氧工艺 （A20) 、 缺氧厌氧好氧工艺 （倒置 A20) 、 吸附生物降解工艺 （AB) 、 厌氧 /好氧工 艺 （A/0) 、 好氧 /厌氧工艺 （A/0) 、 卡鲁塞尔工艺 （Carrousel ) 、 间歇式曝气活性污泥工 艺 （ICEAS) 或开普顿大学工艺 （UCT ) ； 该方法还用于膜生物反应器 （MBR) 、 整体式反应 器 （UNITANK) 、 循环式活性污泥系统 （CASS/CAST ) 、 续批式反应器 （SBR) 或氧化沟的使 用，曝气布置和方式应满足脱氮和除磷的要求。 For bioprocess wastewater plants, as long as there are sections or links in the whole process of biological nitrogen removal and biological phosphorus removal, the sewage treatment method of the present invention can be used to strengthen biological nitrogen removal and phosphorus removal, including but not limited to the following processes: Oxygen-anoxic aerobic process (A 2 0), anoxic anaerobic aerobic process (inverted A 2 0), adsorption biodegradation process (AB), anaerobic/aerobic process (A/0), aerobic/anagae Oxygen process (A/0), Carrousel process, batch aerated activated sludge process (ICEAS) or University of Cape Town process (UCT); this method is also used in membrane bioreactors (MBR) , the use of integrated reactor (UNITANK), circulating activated sludge system (CASS / CAST), continuous batch reactor (SBR) or oxidation ditch, aeration arrangements and methods should meet the requirements of nitrogen and phosphorus removal.
本发明的方法可以用于城市污水和工业污水的处理。 The method of the invention can be used for the treatment of municipal sewage and industrial sewage.
以上实施例只是对本发明的解释， 不是对发明的限定， 本发明所限定的范围参见权利要 求， 在不违背本发明的精神的情况下， 本发明可以作任何形式的修改。 The above embodiments are merely illustrative of the invention, and are not intended to limit the scope of the invention. The scope of the invention is defined by the scope of the invention, and the invention may be modified in any form without departing from the spirit of the invention.
工业实用性： Industrial applicability:
本发明提供一种污水处理方法及其用途， 其广泛用于城市污水和工业污水处理。 它利用 低频超声波能够在剩余污泥中产生强烈的成穴作用来处理剩余污泥， 使得剩余污泥中的微生 物细胞击破， 释放出细胞内物质如碳源和生物酶等有用物质， 并且将处理后的剩余污泥返回 到污水处理的缺氧区或厌氧区中， 来进一步促进脱氮和除磷， 并可以减少污泥产量、 起到改 善污泥脱水性能以及提高污泥矿化程度的效果。
The invention provides a sewage treatment method and a use thereof, which are widely used for urban sewage and industrial sewage treatment. It uses low-frequency ultrasonic waves to generate strong cavitation in the excess sludge to treat the excess sludge, causing the microbial cells in the excess sludge to break, releasing substances such as carbon sources and biological enzymes, and processing them. The remaining sludge is returned to the anoxic zone or anaerobic zone of the sewage treatment to further promote nitrogen and phosphorus removal, and can reduce sludge production, improve sludge dewatering performance and increase sludge mineralization. effect.
Claims
1. 一种污水处理方法， 其特征在于： 将含水率为 90-99. 9%的剩余污泥经过频率为 20-100千赫兹、功率密度为 30-180瓦 /升的超声波处理 5-200秒后，将占污水总量 0. 05-10% 的上述剩余污泥返回到污水的缺氧处理或厌氧处理中， 并维持 10分钟至 6小时的反应时间， 使得处理后的污水中的总氮浓度和总磷浓度分别为 5-15毫克 /升和 0. 1-1. 5毫克 /升。 A sewage treatment method, characterized in that: the excess sludge having a water content of 90-99.9% is subjected to ultrasonic treatment 5-200 at a frequency of 20-100 kHz and a power density of 30-180 watts/liter. After the second, the above excess sludge, which accounts for 0. 05-10% of the total amount of sewage, is returned to the anoxic treatment or anaerobic treatment of the sewage, and the reaction time is maintained for 10 minutes to 6 hours, so that the treated sewage is The total nitrogen concentration and the total phosphorus concentration are 5-15 mg / liter and 0. 1-1. 5 mg / liter.
2. 如权利要求 1所述污水处理方法， 其特征在于： 它包括： 污水的缺氧处理、 好氧 处理和沉淀处理， 沉淀处理后得到上清液和剩余污泥， 剩余污泥经浓缩处理后得到含水率 90-99. 9%的剩余污泥， 用超声波处理过的剩余污泥返回到缺氧处理中。 2. The sewage treatment method according to claim 1, characterized in that it comprises: anoxic treatment, aerobic treatment and sedimentation treatment of the sewage, and the supernatant and the excess sludge are obtained after the precipitation treatment, and the remaining sludge is concentrated. After that, excess sludge having a water content of 90-99.9% is obtained, and the excess sludge treated by ultrasonication is returned to the anoxic treatment.
3. 如权利要求 1所述污水处理方法， 其特征在于： 它包括： 污水的缺氧处理、 厌氧 处理、 好氧处理和沉淀处理， 沉淀处理后得到上清液和剩余污泥， 剩余污泥经浓缩处理后得 到含水率 90-99. 9%的剩余污泥， 用超声波处理过的剩余污泥返回到缺氧处理或厌氧处理中。 3. The sewage treatment method according to claim 1, characterized in that it comprises: anoxic treatment of sewage, anaerobic treatment, aerobic treatment and precipitation treatment, and supernatant and residual sludge are obtained after precipitation treatment, and residual sewage is provided. After the sludge is concentrated, the excess sludge having a water content of 90-99.9% is obtained, and the excess sludge treated by the ultrasonic wave is returned to the anoxic treatment or the anaerobic treatment.
4. 如权利要求 1所述污水处理方法， 其特征在于： 它包括： 污水的厌氧处理、 缺氧 处理、 好氧处理和沉淀处理， 沉淀处理后得到上清液和剩余污泥， 剩余污泥经浓缩处理后得 到含水率 90-99. 9%的剩余污泥， 用超声波处理过的剩余污泥返回到缺氧处理或厌氧处理中。 4. The sewage treatment method according to claim 1, characterized in that it comprises: anaerobic treatment of sewage, anoxic treatment, aerobic treatment and precipitation treatment, and supernatant and excess sludge are obtained after precipitation treatment, and residual sewage is provided. After the sludge is concentrated, the excess sludge having a water content of 90-99.9% is obtained, and the excess sludge treated by the ultrasonic wave is returned to the anoxic treatment or the anaerobic treatment.
5. 如权利要求 1所述污水处理方法， 其特征在于： 它包括： 污水的好氧处理、 缺氧 处理和沉淀处理， 沉淀处理后得到上清液和剩余污泥， 剩余污泥经浓缩处理后得到含水率 90-99. 9%的剩余污泥， 用超声波处理过的剩余污泥返回到缺氧处理中。 The sewage treatment method according to claim 1, characterized in that it comprises: aerobic treatment, anoxic treatment and sedimentation treatment of the sewage, and the supernatant and the excess sludge are obtained after the precipitation treatment, and the remaining sludge is concentrated. After that, excess sludge having a water content of 90-99.9% is obtained, and the excess sludge treated by ultrasonication is returned to the anoxic treatment.
6. 如权利要求 1所述污水处理方法， 其特征在于： 它包括： 污水的厌氧处理、 好氧 处理、 缺氧处理和沉淀处理， 沉淀处理后得到上清液和剩余污泥， 剩余污泥经浓缩处理后得 到含水率 90-99. 9%的剩余污泥， 用超声波处理过的剩余污泥返回到厌氧处理中。 6. The sewage treatment method according to claim 1, characterized in that it comprises: anaerobic treatment, aerobic treatment, anoxic treatment and precipitation treatment of the sewage, and the supernatant and excess sludge are obtained after the precipitation treatment, and the residual sewage is After the sludge is concentrated, the excess sludge having a water content of 90-99.9% is obtained, and the excess sludge treated by ultrasonication is returned to the anaerobic treatment.
7. 如权利要求 1至 6所述权利要求的任一所述的污水处理方法， 其特征在于： 所述 进入超声波处理中的剩余污泥的粘滞系数不大于 1. 0 PaS。 The sewage treatment method according to any one of claims 1 to 6, wherein the residual sludge entering the ultrasonic treatment has a viscosity coefficient of not more than 1. 0 PaS.
8. 如权利要求 7所述污水处理方法， 其特征在于： 所述超声波对剩余污泥进行一次 处理或进行多次处理。 The sewage treatment method according to claim 7, wherein the ultrasonic wave treats the excess sludge once or multiple times.
9. 如权利要求 8所述污水处理方法， 其特征在于： 所述超声波处理为序批式或连续 式。 9. The sewage treatment method according to claim 8, wherein the ultrasonic treatment is a sequential batch or a continuous type.
10. 用权利要求 1所述污水处理方法的用途， 该方法用于厌氧缺氧好氧工艺、 缺氧厌 氧好氧工艺、 吸附生物降解工艺、 厌氧 /好氧工艺、 好氧 /厌氧工艺、 卡鲁塞尔工艺、 间歇式 曝气活性污泥工艺或开普顿大学工艺； 该方法还用于膜生物反应器、 整体式反应器、 循环式 活性污泥系统、 续批式反应器或氧化沟的使用。
10. Use of the sewage treatment method according to claim 1, the method for anaerobic anoxic aerobic process, anoxic anaerobic aerobic process, adsorption biodegradation process, anaerobic/aerobic process, aerobic/anagae Oxygen process, Carrousel process, batch aerated activated sludge process or University of Cape Town process; this method is also used in membrane bioreactor, monolithic reactor, circulating activated sludge system, continuous batch reaction Use of a device or oxidation ditch.
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