A purification treatment system for high-salinity organic wastewater of acephate

CN224768540UActive Publication Date: 2026-09-18ADAMA LTD
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Patent Information

Application Number
CN202522178012.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-10-15
Publication Date
2026-09-18
Estimated Expiration
2035-10-15

AI Technical Summary

Technical Problem

[0004]然而,有许多因素造成生物处理法无法高效运行,一是高盐高浓度有机废水,废水中高盐浓度会通过渗透压胁迫破坏微生物细胞,导致其代谢停滞或死亡,另外高盐还会打破微生物群落平衡,耐盐性差的功能微生物(如降解有机物的异养菌)大量淘汰,而耐盐微生物数量少、降解效率低,无法维持系统正常功能,使生物处理系统的降解效率大幅下降,严重时直接失效

Benefits of technology

1、高盐度有机废水经过吸附再生罐内的吸附树脂填料时,高盐度有机废水与树脂直接接触,因吸附树脂是内部呈交联网络结构的高分子球状体,具有优良的孔结构和很大的比表面积,可以从水中吸附有机溶质,树脂优先吸附废水中的有机物,实现废水中有机溶质的富集,同时由于树脂不带有酸、碱功能基,不能发生离子交换反应,废水中的高盐成分(盐离子)不被吸附,随处理后的废水排出,从而实现废水中有机物与高盐环境的分离;当带有高盐成分的废水排出后,吸附再生罐内吸附失效的树脂通入菌液,菌液在无高盐干扰的情况下,仅与树脂中吸附的有机物接触,菌体分泌的胞外酶破坏有机物与树脂的吸附键,使有机物脱附到菌液中,微生物再将脱附的有机物分解为无害小分子,此时树脂恢复吸附能力,实现树脂生物再生;降解完成后,菌液可循环用于下一轮再生;通过树脂的吸附及生物再生过程,避免了微生物与乙酰甲胺磷高盐度有机废水的直接接触,从而解决高盐环境抑制微生物活性的问题,实现高盐度有机废水的生物处理。

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Abstract

The utility model relates to wastewater treatment field discloses a kind of purification treatment systems of acephate high salinity organic wastewater, including several adsorption regeneration tanks, the adsorption regeneration tank is filled with adsorption resin, the adsorption resin adsorbs organic matter in wastewater, resin regeneration is realized after first wastewater discharge, into bacterial solution in the adsorption regeneration tank, microorganism in the bacterial solution metabolically degrades organic matter.The utility model has the following advantages and effects: it can effectively avoid the adverse effects of salt concentration in acephate high salinity organic wastewater on biological treatment, avoid the impact of drastic changes in water quality and quantity on biological treatment, effectively carry out the growth and metabolism process of microorganisms, realize the treatment of high salinity and high organic content wastewater, and achieve the effects of purification and recycling of salt solution.
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Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a purification system for high-salinity organic wastewater containing acephate. Background Technology

[0002] High-salinity organic wastewater from acephate production refers to acephate production wastewater containing organic matter and at least 3.5% total dissolved solids (TDS). Besides organic pollutants, this wastewater also contains large amounts of inorganic salts. The discharge of high-salinity acephate wastewater will cause very serious environmental pollution. In particular, industrial saline wastewater, in addition to being limited by its inherent high salinity, also contains large amounts of toxic and recalcitrant dissolved organic matter, and with my country's rapid economic development, this level of pollution is increasing dramatically, placing immense pressure on my country's ecological environment.

[0003] The most widely used and economical method in wastewater treatment is biological treatment. Due to its advantages such as high efficiency in removing organic pollutants, simple operation, easy management, reliable operation, and low daily maintenance costs, it has been widely adopted and has become the most critical technology in water pollution control.

[0004] However, several factors can hinder the efficient operation of biological treatment methods. Firstly, high-salt, high-concentration organic wastewater can cause osmotic pressure stress that damages microbial cells, leading to metabolic stagnation or death. Furthermore, high salt levels disrupt the microbial community balance, resulting in the elimination of many salt-tolerant functional microorganisms (such as heterotrophic bacteria that degrade organic matter). Meanwhile, the scarcity and low degradation efficiency of salt-tolerant microorganisms make it impossible to maintain normal system function, significantly reducing the degradation efficiency of the biological treatment system and, in severe cases, causing it to fail entirely. Secondly, many chemical companies adopt order-based production, leading to drastic changes in wastewater quality and quantity. This can also impact biological treatment, reducing the tolerance of microorganisms and consequently decreasing the effectiveness of biological treatment. Utility Model Content

[0005] The purpose of this invention is to provide a purification system for high-salinity organic wastewater containing acephate. This system effectively avoids the adverse effects of salt concentration in the high-salinity organic wastewater on biological treatment, avoids the impact of drastic changes in water quality and quantity on biological treatment, effectively facilitates the growth and metabolism of microorganisms, achieves the treatment of wastewater with high salinity and high organic content, and simultaneously achieves the purification and recycling of salt solutions.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a purification treatment system for high-salinity organic wastewater of acephate, comprising several adsorption regeneration tanks, wherein the adsorption regeneration tanks are filled with adsorption resin, the adsorption resin adsorbs organic matter in the wastewater, the wastewater is discharged first and then bacterial solution is introduced into the adsorption regeneration tank to regenerate the resin, and the microorganisms in the bacterial solution metabolize and degrade the organic matter.

[0007] By adopting the above technical solution, when high-salinity organic wastewater passes through the adsorption resin packing in the adsorption regeneration tank, the high-salinity organic wastewater comes into direct contact with the resin. Because the adsorption resin is a polymer spherical body with an internal cross-linked network structure, it has an excellent pore structure and a large specific surface area, which can adsorb organic solutes from the water. The resin preferentially adsorbs organic matter in the wastewater, thereby enriching the organic solutes in the wastewater. At the same time, since the resin does not have acid or base functional groups, it cannot undergo ion exchange reactions. The high-salt components (salt ions) in the wastewater are not adsorbed and are discharged with the treated wastewater, thereby achieving the separation of organic matter in the wastewater from the high-salt environment.

[0008] After the wastewater with high salt content is discharged, the resin that has lost its adsorption capacity in the adsorption regeneration tank is introduced into the bacterial solution. In the absence of high salt interference, the bacterial solution only comes into contact with the organic matter adsorbed in the resin. The extracellular enzymes secreted by the bacteria break the adsorption bonds between the organic matter and the resin, causing the organic matter to desorb into the bacterial solution. The microorganisms then decompose the desorbed organic matter into harmless small molecules. At this point, the resin regains its adsorption capacity, realizing the bio-regeneration of the resin. After the degradation is completed, the bacterial solution can be recycled for the next round of regeneration.

[0009] By using resin adsorption and biological regeneration processes, direct contact between microorganisms and high-salinity organic wastewater containing acephate is avoided, thus solving the problem of high-salinity environments inhibiting microbial activity and achieving biological treatment of high-salinity organic wastewater.

[0010] A further feature of this invention is that the system includes a main inlet pipe and a main outlet pipe. The adsorption regeneration tank is provided with a branch inlet pipe and a branch outlet pipe. The main inlet pipe is connected to the upper part of the adsorption regeneration tank through the branch inlet pipe. The branch inlet pipe is provided with an inlet valve. The main outlet pipe is connected to the lower part of the adsorption regeneration tank through the branch outlet pipe. The branch outlet pipe is provided with a drain control valve.

[0011] By adopting the above technical solution, when high-salinity wastewater is transported through the main inlet pipe, the opening and closing of the inlet valve on the branch inlet pipe is controlled, and the wastewater is selectively and independently connected to any adsorption regeneration tank through the branch inlet pipe connected to the main inlet pipe without interference. The wastewater in any adsorption regeneration tank is discharged from the system through the branch drain pipe connected to its lower part, and the opening of the drain control valve on the branch drain pipe is controlled, and the wastewater is discharged from the system through the main drain pipe connected to the branch drain pipe. Then the salt solution can be utilized as a resource, and the purified salt solution can be used to recover solid salt or directly used as a production raw material in another production process.

[0012] A further feature of this invention is that the system also includes a series pipe, the lower part of the adsorption regeneration tank is connected to the upper part of the next adsorption regeneration tank through the series pipe, and a series valve is provided on the series pipe.

[0013] By adopting the above technical solution, the connection status between the current adsorption regeneration tank and the next tank can be controlled by opening and closing the valves connected in series on the series pipe.

[0014] A further feature of this invention is that when the organic matter and salt content in the wastewater are both high, several of the aforementioned adsorption regeneration tanks are connected in series, and several of the series valves are opened, allowing the adsorption resin to perform multi-stage adsorption.

[0015] By adopting the above technical solution, wastewater with high organic matter and salt content can be subjected to multi-stage adsorption. When the wastewater passes through several adsorption and regeneration tanks in sequence, the resin in the first tank preferentially adsorbs the high concentration of organic matter in the wastewater, reducing the load on the subsequent tanks; the resin in the subsequent tanks specifically removes residual trace organic matter. This sequential design not only avoids the rapid saturation of a single tank resin due to excessive load, but also gradually intercepts the organic matter in the wastewater through series adsorption, ultimately ensuring that the effluent water quality meets the standards.

[0016] Meanwhile, multiple tanks connected in series can alternately perform adsorption and regeneration operations. When some tanks are adsorbing, the other tanks are regenerating simultaneously. Under the premise of ensuring continuous wastewater treatment, the resin utilization rate is greatly improved, the system operating energy consumption is reduced, and the goal of efficient and economical wastewater purification is achieved.

[0017] A further feature of this invention is that when the organic matter content in the wastewater is low and the salt content is high, several of the aforementioned adsorption regeneration tanks are connected in parallel, and several of the aforementioned water inlet valves are opened simultaneously, allowing the adsorption resin to perform simultaneous adsorption.

[0018] By adopting the above technical solution, for wastewater with high salt content and low organic matter content, the inlet valve controls the simultaneous entry into each adsorption regeneration tank. Taking advantage of the parallel processing of multiple tanks, the wastewater flow rate is dispersed, the residence time of a single tank is extended, and the contact area between the resin and the wastewater is increased. This effectively makes up for the deficiency of weak adsorption driving force at low concentrations and improves the adsorption efficiency per unit resin and the organic matter removal rate. Meanwhile, the parallel operation of multiple tanks can not only significantly increase the system's processing capacity and meet the demand for large-volume water treatment, but also allow for independent adsorption and regeneration operations, flexible switching of operating modes, ensuring continuous wastewater treatment, reducing the frequency of resin regeneration, and achieving efficient and economical operation.

[0019] The present invention is further configured such that: the system also includes a main bacterial solution outlet pipe and a main bacterial solution return pipe; a regenerated solution culture tank is provided on one side of the adsorption regeneration tank; the lower side of the regenerated solution culture tank is connected to the lower side of the adsorption regeneration tank through the main bacterial solution outlet pipe; the upper side of the regenerated solution culture tank is connected to the main bacterial solution return pipe; an air inlet pipe is provided at the lower part of the regenerated solution culture tank; and an air drain pipe is provided at the upper part of the regenerated solution culture tank.

[0020] By adopting the above technical solution, air is introduced into the regeneration liquid culture tank to provide oxygen for the aerobic microorganisms to metabolize, ensuring their activity and efficiently degrading organic matter; air is discharged to balance the air pressure in the tank, while also removing some of the volatile substances produced by microbial metabolism, thus maintaining the stability of the tank environment.

[0021] The bacterial solution in the regeneration culture tank is transported to the adsorption regeneration tank through the main bacterial solution outflow pipe, allowing microorganisms to degrade the organic matter adsorbed by the resin. Then, the bacterial solution that is not completely consumed and is still active in the adsorption regeneration tank is sent back to the culture tank through the main bacterial solution return pipe. At the same time, the intermediate products of organic matter degradation that may be carried in the return solution can also supplement the microorganisms in the regeneration culture tank with nutrients, maintain the stability of the microbial community activity, and ultimately realize the recycling of the bacterial solution and ensure the continuous and efficient regeneration of resin and removal of organic matter.

[0022] A further feature of this invention is that the adsorption regeneration tank is provided with a branch bacterial liquid outflow pipe and a branch bacterial liquid return pipe, the main bacterial liquid outflow pipe is connected to the lower side of the adsorption regeneration tank through the branch bacterial liquid outflow pipe, the branch bacterial liquid outflow pipe is provided with a bacterial liquid inflow control valve, the main bacterial liquid return pipe is connected to the upper side of the adsorption regeneration tank through the branch bacterial liquid return pipe, and the branch bacterial liquid return pipe is provided with a bacterial liquid outlet valve.

[0023] By adopting the above technical solution, the resin in the adsorption regeneration tank is saturated with adsorption, and bacterial solution is introduced to regenerate the resin. When the bacterial solution in the regeneration culture tank is transported through the main bacterial solution outlet pipe, the bacterial solution inflow control valve on the branch bacterial solution outlet pipe is controlled to open and close, and the bacterial solution is selectively and independently introduced into any adsorption regeneration tank through the branch bacterial solution outlet pipe connected to the main bacterial solution outlet pipe. The bacterial solution in any adsorption regeneration tank flows back into the regeneration culture tank through the branch bacterial solution return pipe connected to its upper side, and the bacterial solution outlet valve on the branch bacterial solution return pipe is controlled to open, and the bacterial solution returns through the main bacterial solution return pipe connected to the branch bacterial solution return pipe.

[0024] A further feature of this invention is that a pretreatment tank is provided on the main water inlet pipe, and the pretreatment tank is located at the front end of the adsorption regeneration tank.

[0025] By adopting the above technical solutions, sedimentation, filtration, and flotation are used in the pretreatment tank to separate solid particles and suspended matter in wastewater. This is mainly to prevent the adsorption resin bed from becoming clogged and affecting the adsorption effect.

[0026] A further feature of this invention is that a water inlet pump is installed on the main water inlet pipe, and a drain pump is installed on the branch drain pipe.

[0027] By adopting the above technical solution, the inlet pump on the main inlet pipe is responsible for pumping the wastewater to be treated to the adsorption regeneration tank, and controlling the flow rate and pressure to match; the drain pump on the branch drain pipe discharges the qualified wastewater after adsorption treatment, ensuring the continuous operation of the tank.

[0028] A further feature of this invention is that a bacterial liquid outflow pump is installed on the main bacterial liquid outflow pipe.

[0029] By adopting the above technical solution, the bacterial liquid outflow pump on the main bacterial liquid outflow pipe pressurizes the active bacterial liquid in the regeneration culture tank and then transports it to any adsorption regeneration tank through the main bacterial liquid outflow pipe.

[0030] The beneficial effects of this utility model are: 1. When high-salinity organic wastewater passes through the adsorption resin packing in the adsorption regeneration tank, the wastewater comes into direct contact with the resin. Because the adsorption resin is a high-molecular-weight spherical structure with an internal cross-linked network structure, it has excellent pore structure and a large specific surface area, allowing it to adsorb organic solutes from the water. The resin preferentially adsorbs organic matter in the wastewater, achieving enrichment of organic solutes. Simultaneously, since the resin does not contain acid or base functional groups, it cannot undergo ion exchange reactions; therefore, high-salt components (salt ions) in the wastewater are not adsorbed and are discharged with the treated wastewater, thus achieving the separation of organic matter from the high-salt environment. When the wastewater containing high-salt components is discharged, the adsorption... The resin that has lost its adsorption capacity in the regeneration tank is introduced into a bacterial solution. In the absence of high salt interference, the bacterial solution only comes into contact with the organic matter adsorbed in the resin. The extracellular enzymes secreted by the bacteria break the adsorption bonds between the organic matter and the resin, causing the organic matter to desorb into the bacterial solution. The microorganisms then decompose the desorbed organic matter into harmless small molecules, at which point the resin regains its adsorption capacity, thus achieving resin biological regeneration. After degradation is complete, the bacterial solution can be recycled for the next round of regeneration. Through the resin adsorption and biological regeneration process, direct contact between microorganisms and the high-salinity organic wastewater containing acephate is avoided, thereby solving the problem of high-salinity environments inhibiting microbial activity and achieving biological treatment of high-salinity organic wastewater.

[0031] 2. Through the resin adsorption and biological regeneration process and the connection process of the adsorption regeneration tank, this method can effectively cope with the impact of changes in the influent water quality of acephate high-salinity organic wastewater, enabling it to treat acephate wastewater with drastic changes in organic matter content and salt content.

[0032] 3. Through the pretreatment process of wastewater and the adsorption process of adsorption resin, the salt solution is purified, enabling it to be recycled and reused. This means that solid salt can be recovered or the salt solution can be directly used as a raw material in another production process, creating economic value and saving operating costs.

[0033] 4. For wastewater with high organic matter and salt content, multi-stage adsorption is performed. When the wastewater passes through several adsorption and regeneration tanks in sequence, the resin in the first tank preferentially adsorbs the high concentration of organic matter in the wastewater, reducing the load on the subsequent tanks; the resin in the subsequent tanks specifically removes residual trace organic matter. This sequential design avoids the rapid saturation of a single tank resin due to excessive load, and can gradually intercept organic matter in the wastewater through series adsorption, ultimately ensuring that the effluent quality meets the standards.

[0034] 5. For wastewater with high salt content and low organic matter content, the inlet valve controls the simultaneous entry into each adsorption regeneration tank. By utilizing the advantage of parallel processing in multiple tanks, the wastewater flow rate is dispersed, the residence time in a single tank is extended, and the contact area between the resin and the wastewater is increased. This effectively compensates for the deficiency of weak adsorption driving force at low concentrations and improves the adsorption efficiency per unit resin and the organic matter removal rate. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the adsorption and regeneration tanks connected in series in a purification system for high-salinity organic wastewater containing acephate.

[0037] Figure 2 This is a schematic diagram of the parallel connection of the adsorption regeneration tanks of this utility model.

[0038] Figure 3 This is a schematic diagram of the bacterial circulation in the adsorption regeneration tank and regeneration liquid culture tank of this utility model.

[0039] In the diagram, 1. Adsorption regeneration tank; 2. Main inlet pipe; 3. Main outlet pipe; 4. Branch inlet pipe; 5. Branch outlet pipe; 6. Inlet valve; 7. Drainage control valve; 8. Series pipe; 9. Series valve; 10. Main bacterial solution outlet pipe; 11. Main bacterial solution return pipe; 12. Regeneration solution culture tank; 13. Air inlet pipe; 14. Exhaust pipe; 15. Branch bacterial solution outlet pipe; 16. Branch bacterial solution return pipe; 17. Bacterial solution inflow control valve; 18. Bacterial solution outlet valve; 19. Pretreatment tank; 20. Inlet pump; 21. Drainage pump; 22. Bacterial solution outlet pump. Detailed Implementation

[0040] The technical solution of this utility model will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0041] like Figure 1-3 As shown, the high-salinity organic wastewater of acephate is pretreated. The pretreatment tank 19 removes solid impurities and suspended matter from the water to avoid the presence of solid matter from having an adverse effect on subsequent treatment. Then, the wastewater is allowed to come into full contact with the resin inside the adsorption regeneration tank 1 so that the adsorption resin can adsorb and remove the organic matter in the wastewater.

[0042] For wastewater with high organic matter and salt content, i.e., COD of 7500~15000 mg / L and dissolved salt content exceeding 1%, multi-stage adsorption can be used. After opening the inlet valve 6, the wastewater flows into the first adsorption regeneration tank 1 through the main inlet pipe 2 and branch inlet pipe 4. At this time, the series valve 9 between the tanks is opened, allowing the wastewater to enter the next adsorption regeneration tank 1 through the series pipe 8 for further treatment. The adsorption resin in the adsorption regeneration tank 1 adsorbs the organic matter in the wastewater. After passing through each series tank in sequence, the drain control valve 7 is opened, and the wastewater flows from the branch drain pipe 5 of the last adsorption regeneration tank 1 that has passed through the wastewater into the main drain pipe 3 and is discharged from the system. If the process continues in sequence... The wastewater passes through adsorption and regeneration tanks 1#, 2#, and 3#, while tank 4# remains idle. Tank 1# acts as the primary adsorption tank, tank 2# as the secondary adsorption tank, and so on. When the organic matter content in the effluent from tank 1# increases significantly, it indicates that the resin in tank 1# is saturated. Tank 1# can then be closed, and tank 4# opened, allowing the wastewater to pass sequentially through adsorption and regeneration tanks 2#, 3#, and 4#. At this point, tank 2# is the primary adsorption tank, tank 3# as the secondary adsorption tank, and so on. Regeneration bacteria are introduced into tank 1# for regeneration. After regeneration, the wastewater is ready for use. This cycle repeats continuously in adsorption and regeneration tank 1, thus achieving the treatment of wastewater with high salt and high organic matter content.

[0043] For wastewater with low organic matter content and high salt content, i.e., COD of 500~7500mg / L and dissolved salt content exceeding 1%, multiple adsorption regeneration tanks 1 can be used for simultaneous adsorption. At the same time, multiple inlet valves 6 are opened, and the wastewater is diverted from the main inlet pipe 2 to multiple adsorption regeneration tanks 1 via branch inlet pipes 4. After independent treatment in each tank, the drain control valve 7 is opened, and the wastewater is then simultaneously discharged into the main drain pipe 3 through the corresponding branch drain pipe 5, achieving multi-path parallel and efficient treatment. For example, if adsorption regeneration tanks 1# and 2# are opened simultaneously to treat the wastewater, while tanks 3# and 4# are idle, when tanks 1# and 2# are saturated, the wastewater is switched to tanks 3# and 4# for simultaneous adsorption treatment. Regeneration bacterial solution is introduced into tanks 1# and 2# for biological regeneration. After regeneration, the wastewater is put into use. The adsorption regeneration tanks 1 are used in this cycle to treat wastewater with low organic matter concentration and high salt content.

[0044] The above-mentioned adsorption regeneration tank 1 is filled with bacterial solution to regenerate the adsorption resin. This is a bacterial solution circulation between the adsorption regeneration tank 1 and the regeneration solution culture tank 12. First, air is introduced into the regeneration solution culture tank 12, and necessary nutrients such as carbon source and nitrogen source are added to create a suitable growth environment for microorganisms and complete the microbial culture. Then, for the adsorption regeneration tank 1 that needs to be regenerated, the corresponding bacterial solution inflow control valve 17 is opened to introduce the cultured bacterial solution into the tank to regenerate the adsorption resin. After the regeneration is completed, the bacterial solution outlet valve 18 is opened, and the bacterial solution flows through the branch bacterial solution return pipe 16 into the main bacterial solution return pipe 11, and finally returns to the regeneration solution culture tank 12 to realize the recycling of the bacterial solution.

[0045] The treated wastewater has no change in salt content, and the salt can be recovered as a solid or used directly as a raw material liquid.

[0046] The number of adsorption regeneration tanks 1 in the above-mentioned system of this utility model is not limited to 4 adsorption regeneration tanks 1, and can be appropriately increased or decreased according to process needs; the regeneration time of adsorption resin is usually 12 to 48 hours; since biochemical treatment usually requires a salinity of less than 1%, when the salinity is greater than 1%, the activity of microorganisms will be significantly inhibited due to factors such as osmotic pressure imbalance, making it difficult for traditional biochemical treatment processes to operate effectively. Therefore, the salinity that is not suitable for biochemical treatment is defined as high salt in water treatment. Example 1

[0047] The main organic components are spermine and its derivatives, with a salinity of 6.3%, ammonium chloride as the salt, and a COD of 8900 mg / L. The selected resin is the LS series, and a series process using adsorption regeneration tank 1 is employed. After sedimentation and filtration pretreatment, the wastewater is sequentially passed through three adsorption regeneration tanks 1, with one tank remaining idle for regeneration. The resin addition to each tank is 1–2 m³, and the hourly processing capacity is 50–100 m³. The regenerated bacterial solution is obtained through enrichment, screening, and domestication of naturally occurring bacterial strains, with a regeneration time of 12–18 hours. The effluent COD is 40–110 mg / L. The purified brine then proceeds to the next step for solid salt recovery. Example 2

[0048] The main organic components are intermediates and derivatives from the production of acephate, with a salinity of 8.5%, sodium chloride as the salt, and a COD of 5500 mg / L. XAD series resin is selected, and a parallel process using adsorption-regeneration tank 1 is employed for treatment. The wastewater is first pretreated by filtration to remove solid particles and suspended solids, then simultaneously passes through two adsorption-regeneration tanks 1 (the other two tanks 1 are idle for regeneration). The resin addition to each tank is 1–3 m³, and the daily treatment capacity is 100–350 m³. The regenerated bacterial solution is obtained by directly enriching and acclimating activated sludge from desalinated wastewater using microbiological methods. The average failure time of the primary adsorption tank is 15–24 hours, and the bacterial solution regeneration time is 12–22 hours. The effluent COD is 450–1200 mg / L. The purified brine is directly fed into the sodium chloride byproduct production process as a raw material.

Claims

1. A purification and treatment system for high-salinity organic wastewater containing acephate, characterized in that: It includes several adsorption regeneration tanks (1), each filled with adsorption resin. The adsorption resin adsorbs organic matter in the wastewater. The wastewater is discharged first, and then bacterial solution is introduced into the adsorption regeneration tank (1) to regenerate the resin. The microorganisms in the bacterial solution metabolize and degrade the organic matter.

2. The acetamiprid high salinity organic wastewater purification treatment system according to claim 1, characterized in that: The system includes a main water inlet pipe (2) and a main water outlet pipe (3). The adsorption regeneration tank (1) is provided with a branch water inlet pipe (4) and a branch water outlet pipe (5). The main water inlet pipe (2) is connected to the upper part of the adsorption regeneration tank (1) through the branch water inlet pipe (4). The branch water inlet pipe (4) is provided with a water inlet valve (6). The main water outlet pipe (3) is connected to the lower part of the adsorption regeneration tank (1) through the branch water outlet pipe (5). The branch water outlet pipe (5) is provided with a drainage control valve (7).

3. The acetamiprid high salinity organic wastewater purification treatment system according to claim 2, characterized in that: The system also includes a series pipe (8), the lower part of the adsorption regeneration tank (1) is connected to the upper part of the next adsorption regeneration tank (1) through the series pipe (8), and a series valve (9) is provided on the series pipe (8).

4. The acetamiprid high salinity organic wastewater purification treatment system according to claim 3, characterized in that: When the organic matter and salt content in the wastewater are both high, several of the adsorption regeneration tanks (1) are connected in series, and several of the series valves (9) are opened, so that the adsorption resin can perform multi-stage adsorption.

5. The acetamiprid high salinity organic wastewater purification treatment system according to claim 2, characterized in that: When the organic matter content in the wastewater is low and the salt content is high, several of the adsorption regeneration tanks (1) are connected in parallel, and several of the inlet valves (6) are opened at the same time, so that the adsorption resin can adsorb simultaneously.

6. The acetamiprid high salinity organic wastewater purification treatment system according to claim 2, characterized in that: The system also includes a main bacterial solution outlet pipe (10) and a main bacterial solution return pipe (11). A regenerated solution culture tank (12) is provided on one side of the adsorption regeneration tank (1). The lower side of the regenerated solution culture tank (12) is connected to the lower side of the adsorption regeneration tank (1) through the main bacterial solution outlet pipe (10). The upper side of the regenerated solution culture tank (12) is connected to the main bacterial solution return pipe (11). An air inlet pipe (13) is provided at the lower part of the regenerated solution culture tank (12), and an air drain pipe (14) is provided at the upper part of the regenerated solution culture tank (12).

7. The acetamiprid high salinity organic wastewater purification treatment system according to claim 6, characterized in that: The adsorption regeneration tank (1) is provided with a branch bacterial liquid outflow pipe (15) and a branch bacterial liquid return pipe (16). The main bacterial liquid outflow pipe (10) is connected to the lower side of the adsorption regeneration tank (1) through the branch bacterial liquid outflow pipe (15). A bacterial liquid inflow control valve (17) is provided on the branch bacterial liquid outflow pipe (15). The main bacterial liquid return pipe (11) is connected to the upper side of the adsorption regeneration tank (1) through the branch bacterial liquid return pipe (16). A bacterial liquid outflow valve (18) is provided on the branch bacterial liquid return pipe (16).

8. The purification and treatment system for high-salinity organic wastewater of acephate according to claim 2, characterized in that: A pretreatment tank (19) is provided on the main water inlet pipe (2), and the pretreatment tank (19) is located at the front end of the adsorption regeneration tank (1).

9. The acetamiprid high salinity organic wastewater purification treatment system according to claim 2, characterized in that: A water inlet pump (20) is installed on the main water inlet pipe (2), and a drainage pump (21) is installed on the branch drainage pipe (5).

10. The purification and treatment system for high-salinity organic wastewater of acephate according to claim 6, characterized in that: A bacterial effluent pump (22) is installed on the main bacterial effluent outlet pipe (10).