TW200531933A - Method of wastewater treatment - Google Patents

Abstract

A method of wastewater treatment is disclosed. The method utilizes a bioreactor for treating a wastewater in a biological treatment process, in which the bioreactor comprises a predetermined packed percent of porous biomass carriers, and a substrate solution containing natural organic extracts added into the bioreactor, for facilitating microbial growth to remove residual organics that are difficult to be biodegraded, so as to allow the biological treatment process to treat an industrial effluent with high concentration of chemical oxygen demand (COD) and low concentration of biochemical oxygen demand (BOD5).

Description

200531933 发明 Description of the invention [Technical field to which the invention belongs] The present invention relates to a wastewater treatment device and method, and more particularly to a wastewater treatment device and method using a biological reaction tank, wherein the biological reaction tank contains at least a porous biological load Body (porus Biomass Carrier), and a matrix solution containing natural organic extracts is added to remove COD organic matter that is not easily decomposed in wastewater. [Previous technology] In recent years, China's industry has developed rapidly, the economy has taken off, and the standard of living of the people has improved. The screw metal industry is the most basic industry in China. The various screw products produced by it have become almost impossible in daily life or other industries. The missing part. Among the metal surface hardening heat treatment technology currently used in the screw industry, the products produced by the 'Carburizing' technology have the most stable quality 'and are also the most common. Carburizing treatment has a long history in the domestic metal heat treatment industry, but due to the result of vicious competition over the years, the quality still needs to be improved. In recent years, in order to improve domestic industrial standards, the government has resolutely established a car factory under the economic downturn. Many auto parts must be provided by various parts factories. Among many auto parts, parts produced through carburizing treatment Not a few. How to make the quality of carburizing treatment products meet the requirements of the automotive industry, and take into account the problems caused by industrial pollution, is a problem that the metal thermal processing industry must face in the current development of the country. The carburizing treatment in the metal heat treatment process must be completed one by one through the quenching treatment process, the surface precision grinding treatment process, and the waste oil and gas water washing treatment process. These processes need to be impregnated with chemicals several times, processed at high temperature and multiple stages, and added with cutting oil for precise surface grinding to reduce wear and improve the precision of screw parts. Therefore, the wastewater produced by the metal heat treatment industry is extremely polluting. , Especially the quenching process wastewater and the surface precision grinding process wastewater. In the context of rising environmental awareness and increasingly stringent regulatory requirements, the steel heat treatment industry must strengthen management of its discharged wastewater and waste generated during processing and prevent pollution. The process wastewater generated by the above metal heat treatment industry has properties such as high oil and fat, high organic matter, high suspended solids, and high emulsification. At present, the waste water treatment commonly used in the domestic metal heat treatment industry is a method of combining the various types of process wastewater and combining them to use a variety of physical and chemical methods, including: oil separation, chemical gelation, precipitation or pressure flotation. Removal, activated carbon adsorption, etc., but often due to the high organic matter and high oil and fat properties of wastewater, resulting in high cost of treatment, poor treatment efficiency and unstable water quality results, the quality of the discharged water 'especially chemical oxygen demand (Chemical Oxygen Demand; COD), often fails to meet the release standards, causing great distress to the industry. Please refer to Figures 1 to 3, which illustrate three exemplary wastewater treatment processes known in the metal heat treatment industry. Figure 1 is a wastewater treatment flow chart of the conventional technology. After the wastewater is generated in step 10, the primary treatment of oil separation is performed first (step 11). Then the chemical coagulant is added to the wastewater to perform the chemical coagulation process (step 12). ) As a secondary wastewater treatment, then adjust the pH value (step 13) to an appropriate value, add coagulant (step 14) to form rubber plume sedimentation in the wastewater, and then use pressure removal method (step 15) for solid-liquid separation The chemical sludge and the coagulation treatment water are obtained, and the coagulation treatment water is discharged (step 丨 ◦, or diluted with a large amount of 200531933 water to meet the discharge water standard. The above-mentioned oil and chemical sludge are produced using a plate and frame type The sludge filter press performs sludge pressure filtration (step 15a), and treats it with a sludge dewatering machine to form a sludge cake (step 15b), and then outsources it to landfill or incineration (step 15c). Another type of waste water treatment process is to add a three-stage treatment unit. Please refer to Figure 2. After the waste water is generated in step 20, the primary treatment of oil separation is carried out (step 21), and then the pH value (step 22) is adjusted to an appropriate value. Then, add a chemical coagulant to the wastewater to perform a chemical coagulation process (step 23) as a secondary wastewater treatment, and then add a coagulant (step 24) to form rubber plume sedimentation in the wastewater, and then use the pressure floatation method ( Step 25) solid-liquid separation is performed to obtain chemical sludge and coagulation treatment water, and the coagulation treatment water is adsorbed by activated carbon (step 26) to remove residual COD, and then the drain water is discharged (step 27). Similarly, The above-mentioned produced oil and chemical sludge are sludge-filtered using a plate and frame sludge filter press (step 25a), and treated with a sludge dehydrator to form a sludge cake (step 25b), and then subcontracted Landfill or incineration (step 25c). Please refer to Fig. 3, which shows another kind of wastewater treatment flow chart of the conventional technology. After waste X is generated in step 30, the primary treatment of oil separation is performed first (step 31): Add the chemical coagulant and activated carbon powder to the Γ procedure ^ (step 32) as a secondary waste water treatment and reduce the organic content * 1 to adjust the pH value (step 33), add coagulant plume precipitation (step 34) ), And then use pressure float Obtain the chemical sludge and perform solid-liquid separation step 12 (step 35). After the coagulation treatment water is filtered through sand, 7 will form drain water discharge (step 37). Similarly, the above-mentioned 200531933 ¥ #IJ ^^ ^ ^ (second step 35a), and treated with a sludge dehydrator to form a sludge cake (steps are then outsourced to be buried or incinerated (step 35c). However, the wastewater treatment process in Figure 1 is inefficient The operation is to avoid the inspection of environmental protection units by the waste of water resources. It is a treatment process that does not comply with the second water management and environmental protection. Wastewater treatment in Figures 2 and 3 = It is necessary to constantly inject a large number of particles or Powdered activated carbon, waste activated carbon will be generated after activated carbon adsorption and saturation needs to be regenerated ', so the operating cost is quite high; most treatment plants are in order to save operating costs, the activated carbon is insufficiently added or not updated, and the treated water COD will be difficult to reach the discharge. Water standard. Among them, quenching process wastewater (C0D 1.45X 105 mg / L, SS 74.33ga), surface precision grinding process wastewater (C〇D 40 × 105 mg / L, ss KM⑽) and waste oil and gas water washing process wastewater ( coD 2 5 χ 104 M 9.34g / L), all have the properties of high coD and high suspended solids (Swpended Solid; SS). For the treatment of organic industrial wastewater, biological treatment procedures are a highly efficient and low-cost treatment method. However, the application of wastewater from the metal heat treatment industry is still relatively rare. In particular, although the treated water after the chemical coagulation process also contains a high COD value, the biochemical oxygen demand (Biochemical Oxygen Demand; β〇ε> 5) content that is easily biodegradable may be quite limited. In this case, The traditional secondary biological treatment procedures (such as activated sludge process and its improvement procedures) have their application limitations. For example, under low food-to-micro ratio operation, it is not easy to obtain good sludge settling ability due to microbial growth restriction, which will cause the biodegradation efficiency to be unremarkable. ; 200531933 The organic pollutants of industrial wastewater are often organic substances that are not easily biodegradable. The microorganisms in the wastewater cannot be quickly decomposed in a short time. Moreover, the content of organic substances that can be used by organisms is not high. Furthermore, nitrogen and phosphorus nutrients are usually low or uneven and lack trace substances. Whether the wastewater contains substrates and nutrients required by microorganisms is an important factor that affects the treatment efficiency of biological treatment programs. In the absence of substrates and nutrients, it is extremely easy to become a limitation of microbial growth, unable to provide effective proliferation of microbial flora in biological treatment systems, and the biochemical reaction of microorganisms and wastewater pollutants cannot be performed effectively, making the efficiency of biological treatment systems Failure to do so will result in high COD in the discharged water or unstable water quality. Traditionally, the ratio of BOD · N: P = 100: 5: 1 is used to add urea and acid filling to supplement the deficiency of nitrogen and phosphorus. In theory, after providing the appropriate growth environment and conditions for microorganisms (such as sufficient dissolved oxygen, appropriate pH, temperature, and sufficient nutrients), the microorganisms can use organic matter (ie, COD) in industrial wastewater as a substrate for growth ( Carbon source and energy), to achieve the function of biodegradation. Generally, the external matrix is added in the biological treatment program, and most of them are limited to considering whether the nitrogen and scale nutrients are sufficient. Therefore, the addition of urea (nitrogen source) and phosphate (phosphorus source) is often used. However, these substances may not be sufficient for decomposing wastewater. In view of this, many methods currently use higher-level biofilm treatment procedures to treat relatively difficult-to-decompose industrial wastewater. These methods are briefly described below and are all incorporated by reference in the present invention.

Kanekar et al. Teaches in the Water Science and Technology Journal (Water SCience TechnQl () gy) Vol. 33 No. 8 pp. 47-51 (1996) how to treat phenol-containing dye industrial wastewater with biological treatment technology in order to degrade wastewater Aniline 200531933 dye. The reactor used is a coagulated rectangular tank with bricks (1 Ocmx 8cmx 6.5cm) as the support for the biofilm attachment and growth. The hydraulic retention time of the inflow wastewater is operated from 24 to 72 hours. And cod load rates reached 0.9 kg / m2 / day and 5.67 kg / m2 / day, respectively. After long-term operation, it was found that the removal efficiency of phenol, methyl violet, COD, and TOC in wastewater was 97.5%, 63%, 54.4%, and 51%, respectively.

Suzuki et al. In Separayions Technology, Vol. 6, No. 2, pp. 147-153 (1996) revealed that activated carbon biofilm treatment procedures are used to treat electroplating industry wastewater. Electroplating is widely used in demand surface treatment procedures. Industries, including steel manufacturing, automobile manufacturing, and electronics peripheral industries. The electric mining industry wastewater contains a small amount of difficult-to-decompose organic pollutants (such as anionic surfactants), a small amount of harmful heavy metals such as copper, chromium ions, and a large amount of sodium salts. They found that the formation of biofilm thickness around activated carbon particles is related to the start-up time. It has also been found that harmful heavy metals are detrimental to the growth of microorganisms. The experimental results show that about 50% of organic matter can be removed in water, and the removal rates of copper and chromium ions also reach 80% and 30%, respectively.

TuSten et al. Disclosed the use of High-Rate Moving Bed Biofilm Reactors (MBBR) in Journal of Water Science and Technology, Vol. 39, Nos. 10-11, pp. 257-264 (1999). As a pretreatment program for electroplating industry wastewater. In a moving bed biofilm reactor, small plastics are used as the support for microbial growth and move freely in the reaction tank, so that industrial waste water and microorganisms are completely mixed and achieve the effect of biological treatment. The inflow water can be degraded by about 60 to 80%. 4 people from Lin Yu, Proceedings of the 23rd Symposium on Wastewater Treatment Technology, 2005-11933 Page 460 (1998) Revealed the use of biological activated carbon treatment procedures to treat refractory industrial wastewater Decomposition / conversion of organic matter and discussion of complete processing technologies such as biofilm formation and stability on activated carbon. The results show that after the organic matter that is difficult to be decomposed is decomposed with a good pre-treatment program for physical and chemical treatment, the subsequent treatment with the activated carbon biofilm program can achieve significant results. Os, T (Austin), et al., In British Patent Publication No. GB2, 111, 0391B, discloses an open-cellular material with a network structure (Open-Cellular Material), which is made of polyurethane Porous rectangular parallelepiped particles (25 mmx25nnnXl2.5mm) made of Polyurethane Forms. Microorganisms can be easily intercepted and captured in the pores of this open cellular material in the activated sludge mixture, and further adhere to and grow. . And in the operation of this open cell material in the floating bed reactor, the matrix in the wastewater can be contacted with the biofilm through the cell material surface and the cavity to achieve the treatment effect. To sum up, the use of activated carbon to treat wastewater has its existing disadvantages, and after the treatment of wastewater with activated sludge, sludge concentration and dehydration must be performed. Due to the large amount of mud, it is bound to increase the load on the dehydrator, and the related electricity and sludge water coagulant dosing costs. Second, when using activated sludge to treat wastewater, the removal rate of nitrogen (ammonia is low '), and the micro-types in the aeration tank are incomplete, and the removal effect of COD is also poor. Therefore, when removing difficult-to-decompose organic substances There will be difficulties. In addition, the active sludge must supply a large number of air anaerobic microorganisms to grow, and it consumes a lot of energy. Poor sludge settling properties, resulting in high activity, external and external: Tritium will cause special " When the sludge undergoes solid-liquid separation in the final sinker, the 2005 200531933 sludge felt is too high. When the sludge height exceeds the height of the overflow weir in the final sinker, the sludge will overflow with the drainage water, causing the activated sludge system to fail. It is necessary to propose a wastewater treatment equipment and method to improve the shortcomings of biological treatment of wastewater using activated sludge. SUMMARY OF THE INVENTION Therefore, the object of the present invention is to provide a wastewater treatment method, which is characterized by utilizing different chemical coagulation. After processing different wastewater, the biological treatment program is carried out in the biological reaction tank, so as to treat the high chemical oxygen demand (COD), low biochemical oxygen demand (BOD5) and high suspension The wastewater of the nature of solid matter (SS), wherein the biological treatment tank contains at least a plurality of porous biological supports with a preset filling rate, and a matrix solution containing natural organic matter is added to increase the growth of microorganisms. Decomposable organic matter, so that the entire biological treatment process can achieve high COD wastewater treatment. The wastewater treatment method of the present invention uses a porous biological carrier to replace the conventional activated carbon adsorption method, and adds a substrate containing natural organic extracts. The solution increases the amount of microorganisms, thereby improving the removal efficiency of COD, which not only reduces the generation of activated sludge, simplifies the wastewater treatment process, but also reduces the time and cost of wastewater treatment. According to the above purpose of the present invention, a wastewater treatment method is proposed. The biological coagulation process is performed after the chemical coagulation process to treat wastewater with high chemical oxygen demand (COD), low biochemical oxygen demand (B005), and high suspended solids (SS). This wastewater treatment method includes at least: first, a chemical 'heartbreaking / breaking order' is performed to convert the wastewater into a mixed Treatment of water, followed by a biological treatment program, which introduces coagulation treatment water into the aeration tank of the biological reaction tank, in which 13 200531933 the milk tank contains at least a porous biological support with a preset filling rate, and contains A matrix solution of natural organic extracts to provide microbial growth, and to treat coagulation-treated water by microorganisms; then, a sedimentation process is performed, and a filtration process is performed; characterized in that the aeration tank of the biological reaction tank contains at least Porous biological support, and adding a matrix solution to increase the growth of microorganisms for biological treatment procedures, and then treat wastewater with high chemical oxygen demand, low biochemical oxygen demand, and high suspended solids. The above-mentioned wastewater is characterized by high Wastewater with chemical oxygen demand (COD) and low biochemical activity_BOD5. For example, the waste water treatment process waste water, waste oil and gas washing process waste water, or surface grinding after secondary waste water treatment Process wastewater, or untreated domestic wastewater. However, the present invention is not limited to wastewater. The preset filling rate of the porous biological carrier can be between 1 and 10%. The above matrix solution and wastewater can be added to the aeration tank at a mixing ratio between 2000 and 1: 4000. _ [Embodiment] The purpose of the present invention is to provide a method for treating wastewater, which is to treat different wastewater with different chemical coagulation procedures, and then use a porous biological carrier and add a matrix solution containing natural organic extracts to increase microorganisms. The growth, growth and use of microorganisms to treat the remaining refractory organic matter, so that the entire biological treatment process can achieve high chemical oxygen demand (COD), low biochemical oxygen demand (BOD5) and high suspended solids (ss) ). 14 200531933 The wastewater treatment method of the present invention is applicable to the treatment of wastewater with high chemical oxygen demand and low biochemical oxygen demand (BOD5). The wastewater can be treated as secondary wastewater or untreated. For example, quenching process wastewater, waste oil and gas washing process wastewater, surface grinding process wastewater, or untreated domestic wastewater that has undergone secondary wastewater treatment. However, the wastewater that can be treated by the present invention is not limited to this. Other wastewaters with high chemical oxygen demand (COD) and low biochemical oxygen demand (bod5) can be applied using the wastewater treatment method of the present invention.

行 处理。 Line processing. Please refer to Figure 4 for a flow chart of waste water treatment according to a preferred embodiment of the present invention. First, after the wastewater is generated in step 101, oil and fat are separated (step 103). Next, as shown in step 105, a chemical coagulation process is performed as a secondary wastewater treatment. A chemical coagulant such as sodium sulfide, polyaluminum chloride, or iron-containing polyaluminum chloride (PAC / Fe2) is added to the wastewater. + & Fe3 +; psAW), etc., and adjusted to the preset p H value according to different wastewater sources, and then added a coagulant, such as an anionic polymer (Ani〇np〇iymer), mixed in the wastewater to form rubber plume Precipitation and solid-liquid separation using gravity sedimentation or pressure floatation to obtain coagulated water 107 and chemical sludge 109. Subsequently, the biological reaction tank is used to perform a biological treatment program (step 12ι). The coagulation treatment water 107 is introduced into the aeration tank of the biological reaction tank, and the matrix solution storage tank 123 is provided with the matrix solution. The porous biological support with a predetermined filling rate in it can provide microbial growth after adding the matrix solution, and then treat the coagulation treatment water. Then, a final settlement treatment program is performed (step 125), and the coagulation treatment water is treated in the final settlement tank by gravity sedimentation. After that, a sand filtration process (step 127) can be performed, after the residual suspended solids of the coagulation-treated water are removed in the sand filter tank 15 200531933 volume ⑻), then the drainage water is discharged (step 129). The chemical sludge 109 produced above can be sludge sludge using a plate and frame sludge starch machine (step-111), and the sludge dewatering machine is used to form U cake (step 113), and then Burial or incineration out of commission (step) ^ qd 娜 11 5). The waste water treatment method of the present invention is characterized in that it uses a porous biological carrier to stab people. Adding a matrix solution to increase the growth of microorganisms for biological treatment procedures, the use of microorganisms to treat the remaining difficult to decompose organic matter ', so that the entire biological treatment process can achieve high chemical oxygen demand, low biochemical oxygen demand and high suspended solids The nature of wastewater. # The source of the above microorganisms can be taken from the activated sludge pond, for example, the good treatment success = winery activated sludge pond, or the microorganisms can be provided by domestic wastewater. However, the aforementioned sources of microorganisms are for illustrative purposes only, and the sources of microorganisms of the present invention are not limited to this. This is known to those skilled in the art, and therefore will not be described again here. In short, most of the organic carbon in the above-mentioned various kinds of wastewater belong to organic substances that are not easily biodegradable or difficult to decompose. If the biological process is to be used to directly treat wastewater ', its BOD5 matrix (carbon source and energy of microorganisms) has limited content, and the structure required for the growth of microorganisms is also insufficient, resulting in poor COD treatment effect. Therefore, the present invention adds a matrix solution containing a natural organic extract to provide the carbon, nitrogen, and filling required by the microorganisms, thereby increasing the amount of microorganisms, thereby improving the removal efficiency of COD. In addition, the present invention further provides a wastewater treatment equipment having a biological reaction tank. Please refer to FIG. 5, which is a schematic diagram of a biological reaction tank according to a preferred embodiment of the present invention. The biological reaction tank 200 may be formed by combining an independent aeration tank 204 and a sedimentation tank 206, for example. Or a rectangular parallelepiped made of acrylic, 30 cm x 30 cm x 60 cm high. An acrylic partition 16 200531933 202 divides the biological reaction tank 200 into aeration tank 204 and sedimentation tank 206. Among them, the aeration tank 204 is about 39 L, and the sedimentation tank 206 is about 0.75 L. Aeration tank * 204 Two porous diffuser pipes 214 are installed at the bottom, and the air pipe 215 is connected to the air compressor 216. The air compressor 216 is adjusted by the control valve 217 to a fixed ventilation volume of 80 L per minute. The air required for the growth of microorganisms in the medium and the power for floating the porous biological carrier 208 are generated. An overflow weir 220 and a drain pipe 222 are set above the sedimentation tank 206 to allow the treated water to smoothly flow out after being suspended by gravity, thereby controlling the water depth of the aeration tank 204 at about 55 cm. However, the shape, size, material, and depth of the aeration tank 204 of the biological reaction tank 200 are for illustration only, and are not intended to limit the scope of the present invention. Those skilled in the art will not depart from the spirit and scope of the present invention. Make various equivalent substitutions, changes and modifications. A porous biological support 208 is placed in the aeration tank 204, and the filling rate is i to 10 volume percent, preferably 2 to 6 volume percent, and more preferably about 4 volume percent. Depending on the requirements, the aeration tank 204 may be composed of a porous biological carrier 208 to form a fluidized bed or a fixed bed. The porous biological support 2⑽ is not limited in any shape. For example, the material of the porous biological support 2 08 is a plastic foam, which can be, for example, a polyethylene foam or a polyurethane foam. Foam body, etc., its size is 1 cmx i cmx i cm, its apparent density is 0.05g / cm3, elongation is 120%, cracking strength is 10kg / cm, 50% compression hardness is 0_22kg / cm2 and specific surface area of 0.2 g / m2, 5000 m2 / kg, and 250,000 m2 / m3. However, the shape, size, material, and characteristics of the porous biological carrier 208 mentioned above are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art will not depart from the spirit and scope of the present invention. Inside, Dang Ke 17 200531933 makes various equivalent substitutions, changes and modifications. In the aeration tank 204, a pH monitor 23o, a dissolved oxygen (DissoWed 0xygen; D0) meter 234, and an oxidation-reduction potential (ORP) meter ns can be set according to the circumstances to monitor the mixed liquid in the aeration tank 204 PH, DO, and ORP. ;;

The source of influent wastewater from biological treatment process is from the quenching process, waste oil and gas washing process, surface precision grinding process wastewater, and the coagulation treated water after chemical coagulation process is stored in the wastewater storage bucket for 24 hours. Inflow, where the capacity of the waste water storage tank 240 is, for example, about 500 liters, and its coD is about 400 mg / L. The wastewater inflow is a continuous inflow operation through a wastewater inflow pipe 243 that is adjusted to a desired flow rate by a wastewater quantitative pump 242. The matrix solution prepared in advance to an appropriate concentration is placed in a matrix solution storage tank 210, where the capacity of the matrix solution storage tank 210 is, for example, 50 l, and the matrix solution quantitative pump 212 is passed through the matrix solution inflow tube at a desired controlled flow rate. The path 2 1 3 continuously flows into the aeration tank 204. The base solution used in the present invention contains natural organic extracts and is a dark brown concentrated liquid. The matrix solution and the wastewater are diluted at a mixing ratio of 1: 200 to 1: 4000 and added to the aeration tank 204 through a pipe 213. The composition and properties of the natural organic extract concentrate are listed in Table 1. Table 1 Item Physical and chemical properties Appearance dark brown / liquid pH 2 or less Specific gravity 1.03-1.08 18 200531933

~ —— Sweet soy sauce solid 1¾ ~ 662 mg / L total ~ '151,900 mg / L total nitrogen 2 1,700 mg / L 20,300 mg / L total amine ground state ^ ~ 13,410 mg / L nitrate / nitrite ND Total phosphorus 4,800 mg / L In addition to the above-mentioned matrix solution containing a concentrated solution of natural organic extracts, the substrate solution of the present invention is familiar to those skilled in the art without departing from the spirit and scope of the present invention. Those without the ability do not depart from the spirit and scope of the present invention. For example, properly diluted dilute sugar in the sugar making process, untreated domestic wastewater, or digested activated sludge solution, and then appropriately diluted, can be directly added to the wastewater, respectively, or with the present invention. The matrix solution is properly mixed and then added to the wastewater to enhance the microorganism's ability to decompose COD organic matter. The wastewater treatment equipment of the present invention further includes a final sinker and a sand tank, wherein the final sinker is used to settle the waste water treated by the biological reaction tank by means of gravity sedimentation, and the sand aqueduct is used to remove suspended solids in the wastewater. Since the final sinker and the sand filter tank can use the equipment known in the conventional technology, which is well known to those skilled in the art ', it will not be described again. * According to a preferred embodiment of the present invention, a biological reaction tank, wherein the wastewater treatment equipment may further include a pre-treatment equipment, and the previous treatment equipment is used for secondary treatment of wastewater ', and the 刖 treatment δ also includes at least sequential connection Chemical coagulation 19 200531933 tank, pH adjustment tank, rubber feather and sedimentation tank, and waste water storage tank, and the waste water storage tank is connected to the aeration tank of the biological reaction tank. Before, the processing equipment can be applied with various known equipments, so it will not be repeated here. The following uses a preferred embodiment as an example to illustrate the popular use of the present invention, but it is not intended to limit the present invention. Anyone skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Retouching, so the scope of protection of the present invention shall be determined by the scope of the attached patent application. Example: Advanced treatment using the biological treatment program of porous biological carriers. Since most of the organic carbon in the influent wastewater belongs to organisms that are not easily biodegradable or difficult to decompose, if it is treated by biological procedures, it may be caused by the Bqd5 matrix (microbial Source and energy), resulting in poor results of COD treatment. Therefore, the mixed wastewater of the waste oil and gas water washing process wastewater, the quenching process wastewater, and the surface precision grinding process wastewater, after the chemical coagulation process, undergo the biological treatment process described below. The biological reaction tank to which the matrix solution is added starts the operation from the inflow wastewater, and the matrix solution diluted at a ratio of 1: 500 to 10000 is added. The wastewater inflow and the matrix solution inflow are controlled at 4: 1, and the hydraulic power is increased. The retention time is CHydfaulic Retention Time (HRT) for 16 hours, and then the mixed liquid suspended solids (MLSS) in the aeration tank are measured to monitor the rough concentration of activated sludge. The results are shown in Figure 6. The biological reaction tank with the matrix solution (shown in Figure 6) is only used for seeding on the first day of operation. During the continuous operation for 52 days from 20 200531933, no further pollution in the reaction tank is required. Mud planting. In the biological reaction tank with the matrix solution added, the MLSS content is about 600-2000 mg / L (Day 6 to Day 16) during the period from day 1 to 16. The mlss in the subsequent operation time changes and changes. Not significant, maintained at about 250-600 mg / L (Figure 6, not shown). On the 45th day of operation, the surface of the porous biological support in the biological reaction tank with the matrix solution added was darker, darker, and more uniform. It showed that the biofilm continued to grow, and the quality of microbial attachment and growth was also high. increase. When the porous biological support is cut, it can be observed that there is no obvious difference between the internal color and the color of the surface _, which indicates that the microorganisms are intercepted by the porous biological support in the internal structure and continue to grow. In addition, in order not to make the sludge too old, the biological reaction tank to which the matrix solution is added discharges 1,000 to 10,000 inL of mixed liquid every day for sludge disposal. In contrast, the biological reaction tank without added matrix solution was also seeded on the first day of operation. Later, it was observed that a large amount of SS was contained in the effluent water, and the MLSS concentration was gradually reduced (No. Figure 6 (shown with □), so that the aeration tank's mixed solution gradually becomes clear, and suspended solids are brought out with the release of flowing water. This phenomenon means the loss of bacteria (Wash Out). In order to confirm the loss of bacteria in the biological reaction tank without adding the matrix solution, the second sludge planting was performed on the 17th day of operation, and the MLSS increased from the original 30 mg / L to about 1620 mg / L. However, The same phenomenon occurs again (Fig. 6, indicated by □). Then, at the beginning of the 30th and 37th days, sludge was planted in the biological reaction tanks without added matrix solution and liquid to increase the MLSS concentration, but similar bacterial cell loss was consistently observed repeatedly (Figure 6). On the other hand, the surface color of the porous biological support 21 200531933 in the biological reaction tank without adding the matrix solution is not different from that before use, and the color of the cut surface structure is consistent with the surface, indicating that the biofilm cannot grow in the porous organism. The body structure. ° · Due to the inflow of the matrix solution, it provides the basic elements for the continuous growth of the biofilm, and enables the microorganisms to persist and proliferate in the biological reaction tank. The dense biofilm contained in the porous support is more difficult to carry out than suspended organisms, so the Cell Residence Time is longer. In general, the longer the cell residence time, the easier it is for the microbial population to derive special bacteria to resolve COD in the wastewater that is difficult to decompose. The Environmental Protection Agency has recently released the standard for discharge water in the metal surface treatment industry. The upper limit concentration of COD is 100 mg / L, and the upper limit concentration of suspended solids is 30 mg / L. According to the wastewater treatment equipment and method of the present invention, in the biological reaction tank to which the matrix solution is added, the effluent BOD5 (Soluble BOD; SBOD5) is not significantly higher than the influent wastewater concentration, and is often lower than 20 mg / L. This result shows that the substrate (b0d5) added to the biological reaction tank with the substrate solution is almost completely decomposed by the use of the biofilm, so as not to cause _BOD5 pollution caused by the residual water. Furthermore, the addition of the external matrix solution to the biological reaction tank provides the basic elements for the continuous existence and proliferation of microorganisms in the reaction tank. In addition, the HRT operation for 16 hours allows the microorganisms to continue to grow, so the inflow wastewater The COD concentration showed a significant (ρ < 〇. 05) degradation efficiency, which was about 75% or more, which was equivalent to reducing the COD concentration of the influent wastewater from about 400 mg / L to the COD concentration of the draining water of about 80 to 90 mg / L and SS below 30 mg / L. In contrast, in the biological reaction tank without added matrix solution, the influent wastewater COD could not be formed. 22 200531933 Provides microbial growth. The biofilm cannot be formed. Therefore, there is no ability to degrade the influent wastewater COD. The COD concentration in the influent wastewater was reduced from about 400 mg / L to only the COD concentration in the effluent water, which was about 230 mg / L, and the SS was higher than 40 mg / L. It can be known from the above-mentioned preferred embodiments of the present invention that the method for treating waste water provided by the present invention is characterized in that different chemical coagulation procedures are used to treat different waste water, and then the porous biological support is used and a matrix containing natural organic extracts is added. Solution to increase the growth of microorganisms, and then use microorganisms to treat the remaining refractory organic matter, so that the entire biological treatment process can achieve high chemical oxygen demand (COD), low biochemical oxygen demand (B〇E > 5) and high Wastewater in the nature of suspended solids (SS). The wastewater treatment method of the present invention uses a porous biological support to replace the activated carbon adsorption method of the conventional technology, and adds a matrix solution containing natural organic extracts to improve the removal efficiency of COD, which not only reduces the amount of activated sludge generated, but also simplifies wastewater treatment. Process, and even reduce the time and cost of wastewater treatment. Although the present invention has been disclosed as above with a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make various modifications and decorations without departing from the spirit and scope of the present invention. The protection scope of the present invention shall be determined by the scope of the attached patent application. Brief description of the drawings] Figure 1 shows a kind of wastewater treatment flowchart of the conventional technology; Figure 2 shows another kind of wastewater treatment flowchart of the conventional technology; Figure 3 shows another conventional technique A wastewater treatment flow chart; FIG. 4 is a flow chart of a waste water treatment unit according to the present invention—a preferred embodiment; FIG. 5 is a flow chart of a biological reaction tank not according to a preferred embodiment of the present invention; And FIG. 6 is a graph showing the concentration change of the suspended solids in the mixed liquid in an aeration tank according to a preferred embodiment of the present invention at different operating times. [Simplified description of element representative symbols] 10: Wastewater 12: Chemical coagulant 14: Adding coagulant 15a: Sludge pressure filtration 15c: Landfill or incineration 20: Wastewater 22: Adjusting pH 24: Adding coagulant 25a: Filter press of sludge 2 5 c: Landfill or incineration 27: Drain water 3 1: Separation of grease 32 33 35 35b: Formation of sludge cake 3 6 Sand; 25b: Formation of sludge cake 26: Activated carbon adsorption 30: Wastewater 3 5 cLanding or incineration 3 7: release water

11: Separation of fats and oils 13: Adjustment of pH 15: Pressurized floatation 15b: Formation of sludge cake 16: Drainage water 21: Separation of fats and oils 23: Addition of chemical coagulant 25: Pressurized floatation

Adding chemical coagulant and activated carbon to adjust pH 34: Adding coagulant to pressurize floatation 35a: Sludge pressure filtration 24 200531933 101: Wastewater 103: Oil separation 105: Chemical coagulation program 107: Coagulation treatment water 109: Chemistry Sludge 111: Sludge pressure filtration 113: Formation of sludge cake 115: Landfill or incineration 121: Biological treatment using a biological reaction tank: Procedure 123: Matrix solution storage tank 125: Final settlement treatment procedure 127: Sand filtration, procedure 129 : Drain water 200: Biological reaction tank 202: Baffle 204: Aeration tank 206: Settling tank 208: Porous biological carrier 210: Matrix solution storage tank 212: Matrix solution dosing pump 213: Matrix solution inflow pipe 214 : Porous diffuser 215: Vent 216: Air compressor 217: Control valve 220: Overflow 222: Drain tube 230 · pH monitor 234: Dissolved oxygen meter 238: Redox potentiometer 240: Wastewater storage tank 242: Wastewater dosing pump 243: Wastewater inflow pipeline

25

Claims (1)

200531933 Pick up and apply for patent Fanyuan1 · A wastewater treatment method, which uses a biological reaction tank _ to carry out a biological treatment program, thereby treating high chemical oxygen demand (COD), low biochemical oxygen demand (Bi〇chemical 〇xygen Demand; B〇D5) and high suspended solids (Suspended solid; SS), and the wastewater treatment method includes at least providing the biological treatment tank, wherein the biological treatment The tank includes at least an aeration tank and a sedimentation tank, and the aeration tank includes at least a plurality of porous biological supports with a predetermined filling rate, and a substrate solution with natural organic matter is added to provide a microbial growth. And treating the wastewater by the microorganisms; in an inflow step, the wastewater is flowed into the aeration tank of the biological treatment tank at a first flow rate, and the matrix solution is flowed into at a second flow rate In the biological treatment tank; and performing a biological treatment step, the wastewater is treated by the microorganisms, and the biological treatment step is performed with a hydraulic retention time. Call 2. The wastewater treatment method as described in item 1 of the scope of patent application, wherein after the biological treatment procedure, it further includes: · performing a sedimentation treatment procedure to sediment the wastewater; and performing a filtration procedure to remove the wastewater Residual suspended solids (SS) 〇3. The wastewater treatment method as described in item 1 of the patent application scope, wherein the 26 200531933 wastewater is selected from the group consisting of coagulated water treated by one of the secondary wastewater treatments, and untreated A group of domestic wastewater and a combination of the above. 4 · The wastewater treatment method according to item 3 of the scope of the patent application, wherein the coagulation treatment water is selected from the group consisting of quenching process wastewater that has undergone one of the secondary wastewater treatments and waste oil and gas washing treatment that undergoes one of the secondary wastewater treatments. A group of process wastewater, a surface grinding treatment process wastewater which is one of the secondary wastewater treatments, an untreated domestic wastewater, and a combination thereof. 5. The wastewater treatment method according to item 1 of the scope of the patent application, wherein the hydraulic retention time is a value of one of the operating volume of the aeration tank divided by the sum of the first flow rate and the second flow rate, and the value is Between 4 and 10 hours. 6. The wastewater treatment method according to item 1 of the scope of the patent application, wherein the aeration tank is constituted by the porous biological carrier as a fluidized bed. 27. The wastewater treatment method according to item 1 of the scope of patent application, wherein the aeration tank is composed of the porous biological support to form a fixed bed. ^ 8. The wastewater treatment method according to item 1 of the scope of patent application, wherein the porous single system is a plastic foam. … 9. Please refer to the wastewater treatment method described in item 8 of the patent, in which the foaming system made of plastic is a polyethylene foam. 27 200531933 ι ·· The wastewater treatment method according to item 1 of the scope of patent application, wherein the preset filling rate is between 1 and 10 percent. 11 The wastewater treatment method according to item 1 of the scope of patent application, wherein the preset filling rate is between 2 and 6 percent. 12. The wastewater treatment method and method as described in item 1 of the scope of patent application, wherein the preset filling rate is preferably 4%. 13. The wastewater treatment method according to item 1 of the scope of the patent application, wherein the mixing ratio of 0 基 吴 Wu / Valley and distant wastewater has a mixing ratio between 1 ·· 2⑼0 and 1: 4000, and the base solution It contains at least: a total organic content of 15 1900 mg / L; a solid content of 662 mg / L; and one of the matrix solutions has a pH value less than 2, a specific gravity ranging from i · 0 to Lu 1.1, a total nitrogen content of 21700 ppm A Kjeldahl nitrogen content is 2030 ppm, a total amine nitrogen content is 1341 ppm, and a total phosphorus content is 4800 ppm. 14. The wastewater treatment method according to item 1 of the stated patent scope, wherein the base solution is further selected from the group consisting of a molasses, a domestic wastewater and a digested activated sludge solution. 1 5. The wastewater treatment method described in item 1 of the declared patent scope, wherein 28 200531933 one of the aeration tanks further contains a pHet redox potentiometer for monitoring respectively; two,-dissolved oxygen meter, and -PH Value, one dissolved oxygen value ... oxidation return electricity = of the wastewater in the tank-16. The wastewater treatment method described in item 1 of the scope of patent application, which includes a plurality of porous diffuser tubes to provide the aeration tank with the : The air required for biological growth 'and provides the buoyancy required for the porous biological support. 0 17 · — a wastewater treatment method raft proper 丨 is the use of a chemical coagulation process to treat a wastewater' and then a biological reaction Library reveals φ; 隹 < .. J 仄 仄 仄 仄 处理 a biological treatment program, in order to deal with high chemical oxygen demand (C0D), low 4 wu two θ ν low biochemical oxygen demand (B 〇D5) and the properties of high suspended solids (SS) _ mochi ,; the upper shell W calendar water, and the wastewater treatment method at least includes the chemical coagulation process to make the wastewater into-㈣ treatment Water; and performing the biological treatment procedure, wherein the biological agent The management program includes at least providing the biological treatment tank, wherein the biological treatment tank includes at least an aeration tank and a sedimentation tank, and the aeration tank includes at least a plurality of porous biological carriers with a preset filling rate, A substrate solution with natural organic matter is added to provide a microorganism growth, and the coagulation treatment water is treated by the microorganism. An inflow step is performed to flow the coagulation treatment water to the organism at a first flow rate. In the aeration tank of the treatment tank, and flowing the matrix solution to the biological treatment tank t at a flow rate of 29 200531933; and performing a biological treatment step for treating the coagulation treatment water by the microorganisms, and The biological treatment step is performed with a hydraulic residence time. 18. The wastewater treatment method according to item 17 of the scope of application for a patent, wherein after the biological treatment procedure, it further comprises: VIII and suspended solids to perform a sedimentation treatment procedure to sediment the coagulation treatment water; A filtering process is performed to remove the residue (SS) of the coagulation treatment water. 19. The wastewater treatment method according to item 17 of the patent application scope, wherein the wastewater is selected from the group consisting of secondary wastewater treatment. One of the coagulation treatment water: a group of domestic wastewater and a combination of the above. 20. The wastewater treatment method according to item 19 of the scope of the patent application, wherein the coagulation treatment water is selected from the group consisting of secondary wastewater treatment_quenching process wastewater, secondary wastewater treatment—waste oil and gas water washing treatment. Process: Wastewater, treated by a second-level wastewater Xun Xi- ^ ^ ^ X, a group of surface grinding treatment process wastewater, untreated-domestic wastewater and a combination of the above. 21 · The method of wastewater treatment described in claim 17 of the scope of the patent application, where the hydraulic retention time is-the operating volume of the aeration tank divided by the first; and-the sum of the -flow I values- , And the value is between 4 and 1Q hours. 30 200531933 22 · The wastewater treatment method as described in item 17 of the scope of Shenqing Patent, wherein the aeration tank is a fluidized bed composed of the porous biological support. 23. The wastewater treatment method according to item 17 of the scope of the patent application, wherein the aeration tank is composed of the porous biological support to form a fixed bed. 24. The method for treating waste water as described in item 17 of the scope of patent application, wherein the porous single system is a plastic foam. 25. The wastewater treatment method according to item 24 of the scope of the patent application, wherein the plastic foaming system is a polyethylene foam. 26_ The wastewater treatment method according to item 17 of the scope of patent application, wherein the preset filling rate is between 1 and 10 percent. 27. The wastewater treatment method according to item 17 of the scope of patent application, wherein the preset filling rate is between 2 and 6 percent. 2 8 · The wastewater treatment method according to item 17 of the scope of patent application, wherein the preset filling rate is preferably 4%. 29. The wastewater treatment method according to item 17 of the scope of the patent application, wherein the matrix solution and the wastewater have a mixing ratio between 1: 2000 and 1: 4000, and the matrix solution includes at least: 31 200531933 a total organic content of 15 1 900mg / L; a solid content of 662mg / L; and one of the matrix solutions has a pH value less than 2, a specific gravity between 1.0 and 1.1, a total nitrogen content of 21700ppm, Kelvin The nitrogen content was 2300 ppm, a total amine-based nitrogen content was 1 341 Oppm, and a total phosphorus content was 48,000 ppm. 30. The wastewater treatment method according to item 17 of the Shen Jing patent scope, wherein the matrix solution may be further selected from the group consisting of a molasses, a domestic wastewater, and a digested activated sludge solution. 3 1 · The wastewater treatment method according to item 17 of the scope of the patent application, wherein one of the aeration tank further includes a pH monitor, a dissolved oxygen meter, and a redox potentiometer to monitor the aeration respectively. A pH value, a dissolved oxygen value, and a redox potential value of the wastewater in the tank. 32. The wastewater treatment method according to item 17 of the scope of the patent application, wherein the aeration tank further comprises a plurality of porous air diffusers to provide air required for the growth of the microorganisms in the aeration tank and provide the porous organism The buoyancy required by the load. 32