TW293810B - Nutrient removal by combined fixed film and activated sludge unit - Google Patents

Abstract

The combined process of anaerobic-aerobic RBC and activated sludge is designed for consideration of removing carbon, nitrogen and phosphorus simultaneously in wastewater. Fully submerged RBC is added in both anaerobic and anoxic reactors to provide a biological bed for biofilm and to mix sludge for suspension. Two stages of partially submerged RBC are set on aerobic reactor to replace the tradition nitrification reactor and shorten hydraulic retention time for nitrification. In the investigation, the inlet concentration of synthetic municipal wastewater is fixed, then vary the operational parameters of total hydraulic retention time (HRT=12,10,8 hrs), return sludge ratio (r=0.25,0.5) and mix liquid recycle ratio (R=0.5, 1.25, 2.0) to study the characteristics and kinetics of this new process. The optimal operation parameters are achieved under the performance of HRT=10 hrs, r=0.25 and R=2.0.

Description

^^ 3810 Α7 Β7 5. Description of the invention (1) The present invention is a periodical sewage treatment method and device, in particular, there is a combination of anaerobic and aerobic rotating biological discs and activated sludge process to remove organic radon, radon and Phosphorus method and device. In recent years, due to rapid economic development and rapid changes in social structure, the living standards of nurses have been increasing day by day, and the public has gradually attached importance to the quality of life. As a result of the expansion of man-made economic activities, public waters such as rivers, lakes, reservoirs, etc., suffered from the pollution of waste water discharge, resulting in the deviation of the content of organic meals and meal materials such as m and phosphorus in the water table, resulting in different degrees of excellent meals This phenomenon not only reduces the dissolved air in the water and the safety and sanitation of the water source of the Caiqi water source, but also destroys the original natural ecological environment in the water. Currently, the 32 reservoirs in Taiwan provide irrigation, public water supply, and water consumption, which accounts for about 50% of the total water consumption. However, according to the analysis results of the 78 years of Taiwan ’s Diban Reservoir ’s optimal meal consumption by the Ministry of Economic Affairs of the Ministry of Economic Affairs, it shows that Of the 18 reservoirs surveyed, 14 or 15 reservoirs are in a state of excellent meals, and the Environmental Protection Department of the Executive Yuan " 78 years of information on the sale of the Taiwan region of the Republic of China in the Republic of China " also pointed out that Most of the water in the upper reaches of the river can maintain good water quality, but the reservoirs located in the middle and lower reaches of the river have poor water quality and are subject to different degrees of pollution. They should be immediately controlled. Printed by the Beigong Consumer Cooperative of the Central Bureau of Economic Development of the Ministry of Economic Affairs (please read the precautions on the back before filling out this page). Therefore, China ’s newly released discharge water standard has included radon, phosphorus, etc. in the detention control project. The water nipple of nitrogen and nitrogen is shown in Table 1. However, general domestic sewage, pig waste water and landfill effluent all contain substances such as beta-radon, such as Table 2. At present, the treatment of urban domestic sewage is mostly based on the secondary biological treatment of organic sludge removal by the activated sludge method. The removal rate of radon and phosphorus in the sewage is low (general nitrogen is 10 ~ 40Χ,- 3-This paper uses the Chinese National Standard (CNS) Α4 specification (210Χ297 mm) A7 _B7 5. Description of the invention (2) Phosphorus is 5 ~ 20J!). If these wastewaters are only treated by secondary biological treatment, they still cannot reach the new 87-year discharge water standard. Therefore, in order to cooperate with the future discharge water control and avoid the occurrence of water eutrophication, the development of nitrogen and phosphorus treatment technologies has become an urgency. Must be carried out. The most important substances that cause eutrophication in closed waters are organic sulfonate, nitrogen, and phosphorus. The traditional treatment method is mainly to remove organic W. After decades of research, nitrification and denitrification technologies have been developed. In recent years, more methods of removing phosphorus have been developed, and it is now possible to simultaneously remove organic matter, radon, phosphorus and other substances in a facility. The main purpose of the present invention is to simultaneously remove organic sulfur, radon, and phosphorus in water by biological treatment, which will certainly help the domestic sewage *. --------- 一-装-(Please read the note $ item on the back and then fill in this page) Table 1 Quasi-projects of water quality samples for radon and phosphorus release water Ammonia radon (Bg) from 1982 to 1987 / 1) 20 10 Nitrate m (ng / i) 100 50 m Acid salt (> g / i) 10 4

* tT

L List printed by the Industrial and Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs 2 Main Wastewater Raw Water Quality Items 100 Domestic Sewage Meal Pig Wastewater Garbage Exudate B0Dr (ng / 1) 200 3,000 5,000 SS (ng / 1) 200 8,000 1,000 TN (丨g / 1) 40 700 2,500 © Radon (ng / 1) 25 250 1,500 TP (ng / 1) 10 180 400 -4-This paper scale uses the Chinese National Standard (CNS) A4 specification (210X297 mm) 223810 A7 B7 5. Description of the invention (3) Known principles of nitrogen and phosphorus removal: <1> Principle of deuterium removal (please read the precautions on the back before filling out this page) In the biological treatment process, in addition to «removal of radon by assimilation, In addition, ammonia radon can be converted into nitrogen by nitrification and denitrification. Nitrification i is the process of synthesizing cytoplasm by self-supporting barnyard gasification of ammonia nitrogen first to nitrite and then to nitrate deuterium to release energy, and the process of synthesizing cytoplasm with digasification or salt The self-operated bacteria is Nitrosoionas, the latter self-operated as Nitrobacter hurricane, and its reaction formula can be transformed into: ΙΘ Nitrosononas NH3 + CO * + Ο *-&gt; cells + NO2-

Hitrobacter NOz- + CO2 + Oz-y cells + NOa &quot; 15 and the denitrification pseudo facultative heterotrophic bacteria take nitrate as the receiver of hydrogen, and convert the nitrate nitrogen into N2 and NO, and decompose the organic base. Source for energy. Barnard (1975) found from the experimental results that when there are 20 sufficient sulfon sources in the wastewater for the denitrification reaction, the denitration rate is zero order for the concentration of nitrate radon and the concentration of organic nitrate in the water printed by the Beigong Consumer Cooperative of the Central Bureau of Economics and Development of the Ministry of Economic Affairs. The response is only related to the biological concentration. Generally, the pattern of following the stream is often used, and the denitration reaction eaves are placed in front of the nitrification reaction tank, and the denitration is carried out with the source contained in the raw wastewater, in addition to providing the age required for the later stage of nitrification, and can save chemical The cost of adding medicine. &lt; 2 &gt; Principle of Biological Phosphorus Removal Biological phosphorus removal mainly uses the role of phosphorus accumulation (Acinetobacter) to release phosphorus under anaerobic conditions and to accumulate under aerobic conditions. According to the empirical formula of the activated sludge chemistry group proposed by Herrard and the -5-the paper standard adopted by Holner-this paper scale uses the Chinese national standard (CNS &gt; A4 specification (210X297 mm). A7 B7 V. Description of the invention (4) The test formula (Μτ · 0 «Ν17Ρ estimates that the phosphorus content in the activated sludge is about 2X 0

Both Coieau et al. (1986) and Mino et al. (1984) proposed a biochemical metabolic chess game for biological phosphorus removal to explain the eaves system of phosphorus accumulation bacteria to remove brilliance. As Phosphorus accumulators are aerobic microorganisms, they cannot decompose under anaerobic conditions, but they can decompose the polyphosphate stored in «and produce adenosine triphosphate (ATP). Phosphorus substitutes use ATP to Ingest extracellular organic matter (short bond fatty acids), such as acetate, lactate, and other substrates into the cell, and take it as poly- &gt; 3-xiangbutyric acid (poly-Lu-hydroxbutyrate , PHB) is stored in 酦. The anaerobic section will be released due to the release of orthophosphate, causing the concentration of absolute erbium in water to rise away. Under aerobic conditions, the phosphorus storage bacteria that store organic matter are metabolized by eaves in the presence of dissolved gas and cyanide radon (NCU conditions), which is the intake of phosphate in water, and the intake of Dong and brewing polyphosphate content It is exactly inversely proportional to the amount of salt, that is, the more polyphosphates in the body are out of anaerobic conditions, the more phosphates are taken under aerobic conditions, and the intake exceeds 15 the original release &Lt; 3 &gt; The removal of radon and phosphorus in the salt water of the camp meal by single biological sludge are the main factors that cause the excellent meal, so it should be removed at the same time. Since the first biological removal of camp salt bar After the system was developed by Ludack and EUiner (1962), a variety of different processing procedures were printed. Thanks to the development of 20, the most common is the heart 0 program (Anaerobic \ Anoxic \ Oxic) developed by Barnard (1974) It is like adding an anaerobic tank in front of the aeration tank of the standard activated sludge method and a lack of air, and by the sludge flow and the mixed liquid, the purpose of simultaneously removing radon, phosphorus and organic matter is achieved. The viscosity is as follows: (1) It can simultaneously remove organic and Inorganic nitrogen, phosphorus. -6-The paper size is applicable to China National Standards (CNS) Α4 specification (210X297mm) ^^^ 1- ^^^ 1 ^^^ 1 I ί ^^^ 1 IH 1 (please first Read the precautions on the back and fill in this page) A7 _B7_ printed by the Consumer Labor Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs. V. Invention description (5) ⑵ Simple operation and no chemical sludge. ⑶ When denitrifying and dephosphorizing, Direct use of the eaves in the wastewater, without the need for an additional source. ⑷ Part of the sulfonate source is consumed due to denitrification, so the sludge production * is less than that of the general activated sludge. However, the A * 0 program also has the following shortcomings that must be considered The present invention is improved for the following shortcomings of the conventional technology: (1) The length of residence time required for the removal of radon and phosphorus is different. To improve the efficiency of radon removal, the wastewater must be completely nitrified, so the aeration tank needs to be extended Residence time, L0 and reduce sludge discharge to extend the residence time of sludge, so that the nitrification bacteria with a longer generation can grow and mature to have the function of nitrification; and to improve the efficiency of phosphorus removal, the amount of waste sludge must be increased High volume of sludge is discharged from the system, so it needs to be shortened Retention time. ⑵ The anaerobic bacteria in the anaerobic tank are difficult to stay in the anaerobic tank 15 due to the embolization of water flow to exert their function of hydrolyzing the complex organic base. ⑶The denitrification traps in the lack of eaves and the nitrifying bacteria in the aerobic tank Due to the plug flow, it is not easy to stay in the tank to fully exert its effect. ⑷ In order to suspend the sludge in the anaerobic tank and the air-lacking tank, it is necessary to provide power to mix Ο 20 ⑸ To make the gas tank radon safe gasification into Nitrite radon and nitrate radon require a relatively long residence time, so that the organic nitrification bacteria can be fully effective after the first organic gasification is removed. The main purpose of the present invention is to provide a Αζίϊ procedure (Anaerobic-Anoxic- Activated Sludge Process) and rotating biological disc (RBC) combined to remove organics at the same time (please read the note $ item on the back and then fill in this page) '' 丨 Installed · The size of the paper is ready to be used in China (CNS) A4 specifications (210X297mm) 223810 A7 B7 V. Description of the invention (6) Sewage treatment procedures for large and phosphorus-containing meals. Another object of the present invention is to provide a sewage treatment device that combines the principle of wastewater anaerobic contact method, rotating biological disc and a20. In order to achieve the object of the present invention, the sewage treatment process of the present invention includes the following steps: (a) passing a sewage to be treated into an anaerobic tank with at least one anaerobic rotating biological disc (RBC). The time during which the biological phosphorus is released from the biological disc; (b) The sewage is introduced into an air-depleted tank with at least one anaerobic rotating biological disc for a time sufficient to denitrate the nitrate and nitrite in the sewage (C) Introduce the sewage into an activated sludge eave with at least one aerobic rotating organism 0 plate. A sufficient amount for the mold organisms on the rotating biological plate in the anaerobic eaves to adsorb phosphate in the water and enough to make the sewage The time of the nitrification of the atmosphere makes the sewage into a mixed liquid; and (d) The mixed liquid is flowed into a final settling tank, and the sludge and water in it are separated and discarded to obtain a reasonable clean discharge water; and (E) Part of the mixed liquid in the activated sludge tank flows into the air-depleted tank, so that the sewage is partly circulated. Printed by the Negative Work Consumer Cooperative of the Central Department of Economics of the Ministry of Economic Affairs (please read the note item on the back and then fill in this page) The sewage treatment equipment of the present invention includes the following units: one can introduce an anaerobic tank for sewage treatment, There is at least one anaerobic rotating bio-disc on the bio-disc which has an emblem creature that can release phosphorus under anaerobic conditions; an anaerobic tank communicating with the anaerobic tank has at least one anaerobic inside Rotating biological ίθ discs, which have bio-removal organisms that can perform denitrification reaction in the absence of gas; an activated sludge aerated eaves in circulation with the depleted tank, which has at least one aerobic rotating biological disc, disc There is a skimmer that can carry out the nitrification reaction under the aerobic ring block and a skimmer that adsorbs the phosphate reaction; a final settling tank in circulation with the activated sludge aerated eaves to separate the waste sludge in the sewage and -8-Undocumented Chinese Standards (CNS) A4 «L grid (210X297mm) No. 831076¾ Correction page A7 B7 Revision date: 85 / 5th of this year, Description of invention (7)- Use to wipe out the treated sewage; one can remove Part of the mixed sludge in the activated sludge aeration tank runs to the mixed liquid passage line of the air-depleted tank; and a sludge sloping line that can pass part of the precipitated sludge to the anaerobic tank. In order for the present invention to be exposed more clearly, the following will further explain the present invention in the form of a face-to-face embodiment: FIG. 1 is a brief description of the drawings. FIG. 1 is an example of a device embodiment of the present invention; 1: water inlet, 2: Anaerobic tank, 3: Biological rotating biological disc, 4: Anoxic tank, 5: Anoxic rotating biological disc, 6: Activated sludge aeration tank, 7: Aerobic rotating biological disc, 8: Final settling tank, 9: Waste water pipeline, 10: Vent hole, 11: Mixed liquid rushing pipeline, 12: Sludge return pipeline, 13: Waste sludge pipeline. The second _ is the biochemical gas demand change circle of each section of the reaction tank of the first embodiment of the invention; the third _ is the change of the phosphorus concentration of the reaction eaves of each section of the first embodiment of the invention; and the fourth is the invention In the first embodiment, the krypton concentration in each stage of the reaction tank changes. Printed by Beigong Consumer Cooperative, Central Bureau of Standards, Ministry of Economic Affairs (please read the precautions on the back before filling in this page) The present invention is to overcome the shortcomings of the previous AaO method, taking the simultaneous removal of organic sulfur, nitrogen and phosphorus as consideration. The principle of the sleeping water anaerobic contact method and the advantages of the rotating biological garden disk are dissolved into the traditional A2〇 program, which becomes the combined use of the anaerobic and aerobic rotating biological disk and the activated sludge method to improve the traditional A2〇 method for nitrogen and phosphorus removal Missing. The first di is the basic structure flow of the combined procedure of anaerobic and aerobic rotating biological disk and activated sludge method, including an anaerobic tank 2 and an air-lacking tank 4, each of which is equipped with an anaerobic and anoxic rotating biological disk 3 and 5; then set up an activated sludge aeration tank 6, and set up two aerobic rotating biological disc groups 7 on the tank; finally, the final sedimentation tank 8 and automatic scraper equipment. Anaerobic tank 2, lack The gas eaves 4 and the good air durian 6's "Hame are 31 liters, 31 liters and 90 liters respectively, and the knotted worms are 152 liters; the surface area of the rotating biological disc group at each treatment stage is 1.6.2 for the anaerobic section and the deflated section 1.6a2 and aerobic section 3.24η2. -9-This paper scale applies the Chinese National Standard (CNS) A4 specification (210X297mm) νΟϋΙΟ A7 B7 5. Description of the invention (8) Sewage flows from the water inlet 1 into the anaerobic eaves 2 and then into the air-depleted tank 4, and then Flowing into the activated sludge aeration tank 6, the exhaust hole 10 is used to remove the air in the anaerobic eaves 2. A part of the mixed liquid in the activated sludge aeration tank 6 is drawn back to the gas-deficient eaves 4 through the path 11, mixed with the sewage flowing in from the anaerobic tank 2, and then &gt; repeat the previous step. Another part of the sewage sludge from the activated sludge aeration tank 6 flows into the final settling tank 8 through the pipe 15 to cause the sludge to settle and become waste sludge through the path 13 and pathless sludge respectively. As for the treated wastewater, it flows out through the pipeline 9 to complete the sewage treatment process. The following will explain in detail the reactions in the anaerobic scull 2, the lack of air eaves 4, the activated sludge 10 aerated eaves 6 and the final settling tank 8: (1) The purpose of anaerobic is to provide good anaerobic blocks to make organic It is easier to be hydrolyzed by anaerobic extracellular enzymes into soluble simple lipoic acid, and it is easy to be used by skimmers. On the other hand, it provides an anaerobic Hun block, so that the phosphorus barley can release the polybasic acid salt in the brew, so that the aerobic block in the later stage can absorb more phosphorus, so the sewage is in this tank. The effect of residence time is to eliminate the basis for the whole system. Printed by the Consumer Labor Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs (please read the precautions on the back before filling in this page) The rotating bio-disk installed in this anaerobic tank is used to provide a bunker bed for evacuation Can stay in this question for a long time, avoid the loss of anaerobic bacteria 20, and used to adsorb the matrix into the flowing water, improve the effect of removing I, and also have the activated sludge in the stirring tank to make it in a suspended state Function, increase the chance of contact between sludge and substrate, and improve the treatment effect. ⑵The lack of air eaves is to provide a lack of air, so that the activated sludge aeration 6 -10-This paper scale is applicable to China National Standard (CNS) A4 specifications (210X297 mm) Central Ministry of Economic Affairs Printed by the Industry and Consumer Cooperatives A 7 B7 V. Description of the invention (9) The nitrate and nitrite in the mixed liquor flowing into this eaves are denitrified by the adiabatic denitrifying bacteria in it and become the purpose of radon removal . Therefore, the residence time of sewage in this place will have a decisive influence on the removal of radon. The anaerobic rotating bio-disc set in this gas-deficient tank and the anaerobic tank are the same, but they are used to fix aerobic denitrifying bacteria and anaerobic spines. ⑶Activated sludge aeration tank This aeration is the main place for sewage nitrification and adsorption of orthophosphate. On the one hand, it provides a good «Hun environment, so that it can attach the orthophosphoric acid 10 salt in the water to the body; on the other hand, it carries out a nitrification reaction, so that the water atmosphere is nitrified into nitrate by nitrifying bacteria. In addition, the activated sludge is also provided in this block to gasify and decompose the organic slugs that have been previously adsorbed in the activated sludge body, and absorb the organic slugs that have not been decomposed in the water to completely remove the organic sludge. purpose. 15 The purpose of installing aerobic rotating biological discs in this activated sludge aeration tank is to provide aerobic bioremoval and nitrification _ grate bed, so that it can stay for a long time in the question, forming a high concentration, long sludge stay Time (SRT) biofilms can shorten the required contact time and residence time, improve the removal of organic sap, and can replace the traditional nitrification tank function, so that the aeration tank has the functions of removing organic 20 sac and nitrification. ⑷ Final settling tank The purpose of the final settling tank is to be used for final separation, so that the treated sewage and the sludge in it can be separated to achieve the purpose of separating solid brewing, concentrated sludge and discharged sludge at the same time ^ -11 -This paper uses the Chinese Kanjia Step Standard (CNS) A4 specification (210X297mm) (please read the precautions on the back before filling in this page). Ordered by the Ministry of Economic Affairs, Central Bureau of Industry and Commerce, Beigong Consumer Cooperatives Co., Ltd. Printed Α7 Β7 5 3. Description of the invention (10) The system used in the present invention has the following removal characteristics for each pollutant: 1. Removal of organic stalks The removal of organic sulphur by this procedure is shown in the second circle. Here, the hydraulic retention time It is 12 hours and the mixed liquid flow ratio (R), the mixture of Di and Liu) The ratio of the mixture and the inlet flow rate is 0.5 when the biochemical gas demand is removed, where Γ represents the activated sludge flow ratio, the activated sludge and The proportion of inflow, A, Β, C, D, and E represent the inflow, anaerobic section, anoxic section, aerobic section and final settling tank section, respectively. In the anaerobic section, the organic fermentation of large Λ can be removed due to the decomposition of the fermented glutamate and the adsorption of Phosphatosis phosporium; although the inflow in the airless section is affected by the influence of the 10 mixed liquids, it is different. However, the outflow concentration is similar; the concentration of outflow water in the air-deficiency section of each trial is very similar to the outflow water in the good-air section and the final release water from the round shape, indicating that this system has already decomposed organic bacteria The source is exhausted, and there is almost no available organic sulphur source in the aerobic section. This situation is very conducive to the growth of nitrifying self-supporting bacteria on the rotating biological disk in the aerobic section. 15 2. Phosphorus Removal The removal of phosphorus in this procedure is shown in the third circle. In the anaerobic section, due to the accumulation of phosphorus_release of orthophosphate in the stern, the entanglement concentration of the anaerobic section outflow is higher than that of the inflow The irrigation degree is much different. The main operational control factor of phosphorus release is the stop time of the anaerobic section. Therefore, the ratio of the mixed liquid is changed, and the amount of phosphorus output is not large. Although the return sludge contains some Nitrate, but this gas donation section can provide enough residence time to complete the denitrification and phosphorus translation. There are different inflow concentrations in the air-depleted tank; from the 3rd_, it can be found that the phosphorus concentration in the air-depleted section is significantly reduced. This is because the sludge absorbed in the water in the air-depleted section is stored in the phosphorus, in the air depleted section The longer the residence time is, the more phosphorus is absorbed-12-This paper uses the Chinese National Standard (CNS) 6 * 4 * 1 grid (210X297mm) (please pay attention to the back of Mtl before filling this page)

*-Printed by the Ministry of Economic Affairs, Central Bureau of Industry and Consumer Cooperatives A7 __B7 _ V. Description of the invention (11), the lower the outflow phosphorus concentration. In the aerobic section, the sludge also absorbs phosphorus. The longer the residence time, the more phosphorus will be reduced. The phosphorus absorbed and stored in the body by the sludge in the gas-deficient and neurite section will be greater than the amount released during the anaerobic section, which can be seen from the D stick in Picture 3. In the end, this process is to achieve the purpose of phosphorus removal by discarding the sludge containing Kaohsiung 5. The phosphorus removal effect of this procedure is related to the content of waste sludge barriers. Generally, the shorter the residence time, the more waste sludge is, and the shorter the sludge residence time (SRT). 3. Nitrogen removal Figure 4 shows the changes of various radon-containing species in this procedure. In the anaerobic section, 10% of the organic nitrogen in the particulate form is hydrolyzed and converted to atmospheric radon, so the dissolved ammonia radon increases; Denitrification and sludge assimilation make the atmospheric nitrogen and total m decrease. Ammonia m is converted into nitrate nitrogen and nitrite m in the aerobic section due to nitrification. Due to the powerful nitrification function of the aerobic rotating biological disc in this procedure, the conversion efficiency of atmospheric radon is quite high, with an average nitrification rate of 1.8 15 ngN / gVSS / hr 〇This system replaces the traditional nitrification tank with aerobic rotating bio-disc discs, with a total surface area of about 3.38b2. From the observation of the biological phase, it is known that most of the biofilms in the national disc are nitrification stable indicators such as Hongxin and nematodes. Purlin biology proves that the aerobic spinner has the function of attaching nitrifying bacteria. The chess factory of the present invention is designed to be convenient for installation and maintenance of the equipment. The air-depleted tank and the anaerobic tank are designed to have the same capacity. From the experimental results, it is known that the volume of the air-deficient section is insufficient to provide complete denitration, especially when the mixed liquid When the circulation ratio is large, the denitration effect decreases. Therefore, the residence time of the lack of gas eaves should be increased to fully denitrify the nitrification solution in Xunhui. When the lack of gas retention time is sufficient for complete denitrification, the greater the ratio of mixed liquid circulation to denitrification, denitrification-13-This paper scale is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) n HR ^ i ^ 1- ^ 1 in mu (please read the precautions on the back and fill in this page first) 293810 A7 ___B7_ printed by the Beigong Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs V. Invention description (l2) The larger the amount, but the eaves volume required And the power also increased. After several experiments by the inventors to set different parameters, the following conclusions were drawn: (1) This treatment procedure has a very good effect on the removal of organic stalks. When the hydraulic stoppage is> 8 hours, the final concentration of dissolved BODs in the released water All are within 10 mg / L, and the removal rate is above 94m. In addition, with the same hydraulic retention time, the change of sludge return ratio and mixed liquid circulation ratio has little effect on the removal of organic stubble. ⑵This program makes the nitrification rate higher than the general program due to the powerful nitrification function of the aerobic rotating biological disc. When the hydraulic retention time of the aerobic section is more than 2 hours, that is, 10 can completely transform the atmosphere radon, showing the aerobic rotating organisms set up on the aerobic tank The siphon can replace the nitrification tank of the mine after the traditional aeration tank. Under the setting range of the invention (total hydraulic retention time (HRT) = 8 ~ 12hr, r = 0.25 ~ 0.5, R = 0.5 ~ 1.25), the nitrification rate is about 1.8 »g NH3-N / gVSS / hr, and the denitration rate is about About 0.8 ngNO--N / gVSS / hr. 15 (3) According to the estimation of the experiment, if you want to have a good denitrification effect and build a complete denitration, the capacity ratio of the lack gas section to the good gas section should be 1: 1. ⑷The dephosphorization effect of this treatment procedure increases as the hydraulic retention time decreases. The variable sludge flow ratio r = 0.25, 0. Mizuo, there is no obvious effect on the removal of total phosphorus. When the hydraulic retention time is between 8 ~ 10 hours, the phosphorus can be almost completely removed. ⑸This procedure can obtain the best treatment results when the hydraulic retention time is 10 hours, the sludge flow ratio r = 0.25, and the mixed liquid circulation ratio R = 2. At this time, the organic removal of 94.635K and the total removal of 67.00%, 95.89% of total phosphorus was removed. Take a look at this anaerobic and aerobic rotating biological disk and activated sludge method and remove it at the same time--14-This paper size is suitable for China National Standardization (CNS) Α4 specification (210Χ297 mm) (please read the note $ item on the back and then fill in this Page)

、 1T A7 __B7____ Fifth, the description of the invention (l3) The processing procedure of the machine and nitrogen and phosphorus can solve the problem of the shielding of the sludge residence time and the stable gas _ and nitrification of the Α * σ procedure. The single processing procedure simultaneously removes the effects of organic master, nitrogen, and phosphorus, which simplifies the complexity of multi-tank operation and saves the area required for individual settings. !. Although the present invention is exposed as described above in a preferred embodiment, it is not intended to limit the present invention. Anyone who is familiar with this technique can do a little without departing from the spirit and scope of the present invention. Changes and decorations, so the protection scope of the present invention shall be deemed as defined by the appendices of the application. --------- 1 ▲-(Please read note f on the back and then fill in this page) 5 Order

L Printed by the Zhengong Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs 20 15 This paper scale applies to the China Aided Family Standard (CNS) A4 specification (210X 297 mm)

Claims (1)

Printed by the Central Bureau of Standards of the Ministry of Economic Affairs, Consumer Labor Cooperatives II, with Announcement Α8 Β8 C8 No. 丨 Shenhong Special Park Fan Garden Amendment 5s Amendment, your place: Supplement 丨 '85 / 08/20 1Apply for patent scope 1 . A sewage treatment method, including the following steps «: ⑷ Continuously pass a sewage to be treated into an anaerobic tank with at least one anaerobic rotating biological disc (RBC), a microorganism sufficient to release the sludge from the wine flow sludge Phosphorus time; 0>) Re-introduce the above sewage into an air-depleted tank with at least one air-depleted rotating biological disc for a time sufficient to denitrate the nitrate and nitrite in the sewage; (c) Sewage is introduced into an activated sludge tank with at least one aerobic rotating biological disc. It is sufficient for the nitrification and suspension of the biological organisms on the rotating biological disc in the anaerobic tank to adsorb phosphates in the water and sufficient for the cyanide in the sewage. The time of nitrification makes the sewage into a mixed liquid; (d) The mixed liquid is passed into a final settling tank to separate the sludge and water in it to obtain a clean discharge water which is treated, and the precipitated sludge is Burst into the anaerobic tank And (e) the mixture of the activated sludge tank Nai portion of the effluent stream to make the right to do the follow-flat Chen portion to Fengdao denitration effect. 2. For example, in the method of applying patent patent item 1, the number of rotating biological disks in the anaerobic tank and the lacking gas tank is 1, and the number of rotating biological disks in the activated sludge is 2. 3. For example, the method of claim 1 of the Patent Fan Garden, where the ratio of the mixed liquid flowing into the gas-depleted tank to the inflow Dong is 0.5 to 2.0. 4. For example, if you apply for the method of item 3 of the Fanli Garden, the ratio of the sludge flowing back into the anaerobic tank to the inlet is 0.2 to 0.5. 5. For example, the method of applying for patent patent item 2, the total water of the method is -16 _ (please read the precautions on the back and then fill out this page) The scale of this paper is applicable to China National Standard (CNS) Λ4 specification (210X297 Mm) 9 03810 AS B8 C8 D8 Monthly Amendment 丨 Supplement 1 丨 Printed by the Employee Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs ~, the scope of patent application force staying time is 8 hours to 12 hours. 6. As claimed in the patent Fan _ item 5 method, in which the ratio of the mixed liquid flowing into the gas-depleted tank and the inlet flow rate is 2; the ratio of sludge flowing into the anaerobic tank and the inlet flow is 0.25; The total hydraulic retention time is 10 hours. 7. A kind of sewage treatment device, including: an anaerobic tank (2) capable of introducing a sewage to be treated, which has at least one anaerobic rotating biological disc (3), and the biological disc can be used under anaerobic conditions Promote the removal of bio-releasing phosphorus; a gas-depleted tank ⑷ in circulation with the anaerobic tank, which has at least one gas-depleted rotating biological disc (5), which has a denitrification reaction under the block Biological organisms; an activated sludge aeration tank ⑹ in circulation with the lack of gas to contain the sewage flowing in from the lack of gas tank to form a mixed liquid with at least one aerobic rotating biological disc ⑺, The tray has spore organisms that can perform nitrification reaction under aerobic cutting block and suspended microorganisms that adsorb phosphate reaction; a final settling tank ⑻ flowing with the activated sludge aeration tank to separate the sewage The sludge is used to discharge the treated sewage; one can flow part of the mixed liquid in the activated sludge aeration to the mixed liquid return line (11) of the lack of air; and one can partly The sludge returns to the sludge sloping pipeline (12) of the anaerobic tank. 8. For example, the device of item 7 of Shenzhanli Fanguo, in which the mixed liquor wine flow line (11) is like controlling the flow of wine to the question, the ratio of the mixed liquor to the inflow is 0.5 to 2.0〇-17-this The paper scale uses the Chinese National Standard (CNS) A4 specification (210X297 public daughter) — II-I ---- ^ Boundary --- I nn ^ ft &lt; (please read the notes on the back and fill in this page) 6. Scope of patent application 9. For example, the device of item 7 of Shenzhanli Fanyuan, where the sludge flow line (12) controls the flow of sludge to the anaerobic eaves and the ratio of inflow is 0.2 to 0.5 〇10. For example, the device of item 9 of Shenli Fanfan, which further includes a water inlet pipe for flowing the sewage to be treated into the anaerobic tank, is used to control the total hydraulic retention time of 8 to 12 hours. 11. For example, if applying for the device of item 7 of the Revan fan, the number of rotating biological disks of the haze tank and the anoxic tank is 1, and the number of rotating biological disks of the activated sludge gas tank is 2. (Please read the precautions on the back before filling out this page) Order Printed by the Staff Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs -18-This paper scale is applicable to the Chinese National Standard (CNS) Λ4 specification (210X297mm)