A method and system for resourceful treatment of coffee primary processing wastewater

Abstract

The application discloses a kind of coffee primary processing wastewater resource treatment method and system, it is sequentially through adjusting processing, pre-adsorption treatment, filtration treatment, chemical oxidation treatment, AO biochemical reaction treatment, MBR membrane biological reaction treatment;The present application will be wastewater by adsorbent (including pectin) including pectin in suspended or floating state of pollutant (including pectin) is adsorbed and removed, on the one hand, when the material filters, filter cake does not have viscidity, and filtration runs smoothly;On the other hand, the pH value of the filtered liquid material pectin acidification can be effectively controlled, which can effectively reduce the load of the subsequent system and reduce the operating cost;After the filtered liquid material is sequentially subjected to chemical oxidation, AO biochemical reaction and MR membrane biological reaction, it can meet the discharge or reuse irrigation standard, and the sludge generated during the treatment process is composted and fermented in a composting tank, and is reused as fertilizer, realizing the resource treatment of wastewater, with high efficiency and low cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of food industry wastewater resource treatment, in particular to a coffee primary processing wastewater resource treatment method and system. BACKGROUND

[0002] According to the investigation, the coffee fresh fruit processing in Pu'er coffee planting area generally adopts the semi-wet processing technology of completing peeling and degumming at one time, and 1-2 tons of water is consumed for processing 1 ton of fresh fruit, and the average is about 1.5 tons; in addition, a small part of processing enterprises still adopt the full-wet processing technology, and 5-10 tons of water is consumed for processing 1 ton of coffee fresh fruit, and the average is about 7 tons.

[0003] The wastewater produced by coffee fresh fruit primary processing has complex components, and contains peel, pulp, sugar, pectin and the like, and the concentration of CODcr and other pollutants is high, the concentration of fermentation wastewater CODcr is as high as 50000 mg / L, and the average of comprehensive wastewater is 10000-18000 mg / L; the highest BOD is 3500 mg / L, and the average of comprehensive wastewater is 500-3500 mg / L; the wastewater quality BOD / CODcr>0.21.

[0004] The wastewater produced by coffee fresh fruit primary processing has poor biodegradability, and is not suitable for the biochemical treatment process which needs continuous water feeding; the pH is basically acidic (about 4); in particular, the wastewater contains 1000-4000 mg / L of pectin. Pectin is also known as soluble pectin, and its components are polygalacturonic acid methyl ester and galacturonic acid. The aqueous solution is acidic, and is dissolved in 20 times of water to form a viscous liquid, and has high viscosity. In the wastewater filtration process, the filter cake has viscous property during filtration, which causes the filter cloth to be blocked, or the pipeline is blocked during wastewater conveying, so the treatment of pectin is the bottleneck of coffee primary processing wastewater treatment.

[0005] At present, there are few methods for treating coffee primary processing wastewater, and the traditional method is to adopt the three-stage sedimentation and lime neutralization process to treat the processing wastewater. This method only has the functions of acid-base neutralization and sedimentation, and it is difficult to reach the second emission standard of "Integrated Wastewater Discharge Standard" GB8978-1996; and some coffee factories adopt the process of adding alkali to adjust pH + coagulation sedimentation + AO, but the pectin has small density, and a large amount of pectin floc is suspended or floated on the water surface and is difficult to remove by sedimentation, and a large amount of alkali needs to be added for direct pH adjustment, and the cost is high. SUMMARY

[0006] Therefore, based on the above background, the present application provides a coffee primary processing wastewater resource treatment method and system which is low in cost and high in treatment efficiency, and the treated wastewater can reach the standard of irrigation water use in coffee field or discharge.

[0007] The technical scheme provided by the present application is:

[0008] A coffee primary processing wastewater resource treatment method, comprising the following steps:

[0009] S1: the peeling wastewater, fermentation wastewater and cleaning wastewater generated in coffee primary processing are mixed and adjusted after deslagging;

[0010] S2: the wastewater in S1 is pretreated by using an adsorbent;

[0011] S3: the wastewater after adsorption treatment is filtered, and the sludge after filtration is composted and fermented;

[0012] S4: the liquid material after filtration in step S3 is added with a chemical oxidant for oxidation treatment;

[0013] S5: the wastewater after oxidation treatment is adjusted in pH;

[0014] S6: the wastewater in S5 is treated by AO biochemical reaction;

[0015] S7: the wastewater after treatment in S6 is treated by MBR membrane biological reaction.

[0016] Preferably, the adsorbent in step S2 is made of diatom ooze, graphite powder and calcium oxide, and the ratio of the adsorbent to the wastewater is 5-10 g / L.

[0017] Preferably, the pH of the wastewater in step S5 is adjusted to 7.5-8.5 by using sulfuric acid.

[0018] Preferably, the chemical oxidant in step S4 is hydrogen peroxide liquid with a concentration of 30%, and the ratio of the chemical oxidant to the wastewater is 1-5 g / L.

[0019] The application further provides a coffee primary processing wastewater resource treatment system, comprising an adjusting tank, a pretreatment adsorption tank, a filter, an oxidation tank, a pH adjusting tank, an AO biochemical tank and an MBR membrane biological reaction tank.

[0020] The material in the adjusting tank is transported to the pretreatment adsorption tank through a pipeline, the material in the pretreatment adsorption tank is transported to the filter for filtration, the liquid material after filtration of the filter is transported to the oxidation tank for oxidation, the liquid material after oxidation of the oxidation tank is transported to the pH adjusting tank, the material in the pH adjusting tank is transported to the AO biochemical tank through a pipeline, and the liquid material in the AO biochemical tank is transported to the MBR membrane biological reaction tank through a pipeline.

[0021] Preferably, sludge of the AO biochemical tank is delivered to the adjusting tank by a first sludge pump, and sludge of the MBR membrane biological reaction tank is delivered to the adjusting tank by a second sludge pump.

[0022] Preferably, the filter machine further comprises a compost tank, and the solid sludge filtered by the filter machine is delivered to the compost tank.

[0023] Preferably, the oxidation tank is communicated with a hydrogen peroxide storage tank by a pipeline, and the hydrogen peroxide storage tank delivers hydrogen peroxide liquid to the oxidation tank by a pipeline.

[0024] Preferably, the filter machine is a stacked screw filter or a plate filter press.

[0025] The above technical solution has the following beneficial effects:

[0026] The present application adopts physical adsorption technology, chemical oxidation technology and biological treatment technology to solve the technical bottleneck of coffee primary processing wastewater pectin. The adsorbent is used to remove the suspended or floating pollutants (including pectin) and CODcr (the removal rate of CODcr reaches 90%) in the wastewater in advance. This can make the filter cake not sticky in the subsequent process, make the filtration run smoothly, and ensure the normal operation of the subsequent equipment and pump set. The pH value of the filtered liquid can be effectively controlled, and the separation of pectin and water can be realized when the wastewater is not acidified or after acidification. This can further effectively reduce the load of the subsequent system and reduce the operation cost. The organic matter is oxidized and cracked in the oxidation tank, which reduces the load of the AO biochemical reaction. The AO biochemical reaction further removes organic matter and ammonia nitrogen, and the MBR membrane biological reaction degrades the biochemical refractory polygalacturonic acid methyl ester, galacturonic acid and other high molecular organic matter. The treated wastewater can meet the discharge or reuse irrigation standard, and the treatment is efficient and the cost is low. The solid sludge after filtration contains a large amount of plant organic matter and pectin. After composting in the compost tank, it can be recycled as fertilizer. This can realize a certain degree of resource utilization of coffee primary processing wastewater, and realize zero discharge of solid waste. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0028] Figure 1 Process flow chart of the present application

[0029] Figure 2 Structure diagram of the treatment system of the present application Figure 1 ;

[0030] Figure 3 Structure diagram of the treatment system of the present application Figure 2 ;

[0031] Figure 4 Structure diagram of the AO biochemical tank of the present application

[0032] Figure 5 Structure diagram of the MBR membrane biological reaction tank of the present application

[0033] Figure 6 Photo of water sample before and after treatment of Example 2

[0034] In the figure: 1, conditioning tank; 2, pretreatment adsorption tank; 3, filter; 4, oxidation tank; 5, pH adjusting tank; 6, AO biochemical tank; 7, MBR membrane biological reaction tank; 8, composting tank; 9, hydrogen peroxide storage tank; 10, mixer; 11, feeding buffer tank; 12, acid storage tank; 13, agitator; 14, second sludge pump; 15, first sludge pump; 16, first flow meter; 17, second flow meter; 18, third flow meter; 19, online pH meter; 20, liquid level meter; 21, first material pipe; 22, second material pipe; 23, third material pipe; 24, feeding pipe; 25, anaerobic tank; 26, aerobic tank; 27, first biological filler bed; 28, second biological filler bed; 29, first aeration pipe; 30, biological membrane group; 31, second aeration pipe; 32, feeding port. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0036] Embodiments of the present application are described in detail below with reference to the accompanying drawings, in which like or similar elements or features are denoted by the same or similar reference signs, and of which examples are shown in the drawings. In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "vertical", "circumferential" and the like refer to the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0037] In the description of the present application, "first feature" and "second feature" can include one or more of the features. In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features.

[0038] The present application is further described below with reference to the accompanying drawings.

[0039] Embodiment 1: According to Figures 2 to 5 As shown in the figure, the coffee primary processing wastewater resource treatment system comprises a conditioning tank 1, a pretreatment adsorption tank 2, a filter 3, an oxidation tank 4, a pH adjusting tank 5, an AO biochemical tank 6, and an MBR membrane biological reaction tank 7.

[0040] The material in the conditioning tank 1 is transported to the pretreatment adsorption tank 2 through a pipeline, the material in the pretreatment adsorption tank 2 is transported to the filter 3 for filtration, the liquid material filtered by the filter 3 is transported to the oxidation tank 4 for oxidation, the liquid material oxidized by the oxidation tank 4 is transported to the pH adjusting tank 5, the material in the pH adjusting tank 5 is transported to the AO biochemical tank 6 through a pipeline, and the liquid material in the AO biochemical tank 6 is transported to the MBR membrane biological reaction tank 7 through a pipeline.

[0041] As shown in the figure, Figure 1 and Figure 2 As shown in the figure, the conditioning tank 1 is provided with a first material pipe 21, a second material pipe 22, and a third material pipe 23, the first material pipe 21 is used to transport the peeling wastewater generated by coffee primary processing to the conditioning tank 1, the second material pipe 22 is used to transport the fermentation wastewater of coffee primary processing to the conditioning tank 1, and the third material pipe 23 is used to transport the cleaning wastewater of coffee primary processing to the conditioning tank 1. After the wastewater from different processes of coffee primary processing is added to the conditioning tank 1, it is uniformly stirred by a stirrer.

[0042] The sludge of the AO biochemical tank 6 is delivered to the adjusting tank 1 by a first sludge pump 15, and the sludge of the MBR membrane biological reaction tank 7 is delivered to the adjusting tank 1 by a second sludge pump 14.

[0043] In particular implementation, the first sludge pump 15 and the second sludge pump 14 are pumps with timing function, so that the sludge of the AO biochemical tank 6 and the MBR membrane biological reaction tank 7 can be delivered to the adjusting tank 1 at a timing, and then the sludge is treated by the pretreatment adsorption tank 2 and the filter 3, and then delivered to the composting tank for fermentation composting treatment, and finally used as fertilizer, so as to realize zero discharge of solid waste.

[0044] In particular implementation, as shown in Figure 4 The AO biochemical tank includes an anaerobic tank 25 and an aerobic tank 26, the anaerobic tank 25 and the aerobic tank 26 are connected in series, the feed inlet 32 of the anaerobic tank 25 is arranged at the upper portion thereof, the material of the pH adjusting tank 5 is directly delivered to the anaerobic tank 25 for treatment, the material after the treatment of the anaerobic tank 25 is delivered to the aerobic tank 26 for further treatment, a first biological filler bed 27 is arranged at the middle position of the anaerobic tank 25, anaerobic microorganisms are attached to the first biological filler bed 27, a second biological filler bed 28 is arranged at the middle position of the aerobic tank 26, aerobic microorganisms or facultative microorganisms are attached to the second biological filler bed 28, a first aeration pipe 29 is arranged below the second biological filler bed 28 of the aerobic tank 26, and the material after the treatment of the aerobic tank 26 is delivered to the MBR membrane biological reaction tank 7 for further treatment.

[0045] The wastewater of the pH adjusting tank 5 is first delivered to the anaerobic tank 25, the wastewater is in an anaerobic condition, and the organic matters in the wastewater are finally converted into methane, carbon dioxide, water, hydrogen sulfide and ammonia, etc. by the joint action of a large number of microorganisms, so as to realize denitrification and phosphorus removal, and then the organic matters are further degraded by the biological metabolism of aerobic microorganisms under the condition of oxygen in the aerobic tank 26, a series of biochemical reactions are carried out, energy is released step by step, and finally the low-energy inorganic matters are stabilized, so as to realize harmless treatment.

[0046] As shown in Figure 5 The MBR membrane biological reaction tank includes a biological membrane group 30 arranged at the middle portion thereof, a second aeration pipe 31 is arranged below the biological membrane group 30, and the specific structure of the MBR membrane biological reaction tank for treating wastewater and degrading organic matters in the wastewater is a common technology in the field, which is not described herein.

[0047] The composting tank 8 is further included in the embodiment, the solid sludge after the filtration of the filter 3 is delivered to the composting tank 8, and the fertilizer prepared after the fermentation composting of the composting tank 8 can be reused to coffee land, so as to realize resource utilization treatment.

[0048] The top of the pretreatment adsorption tank 2 is provided with a feeding buffer tank 11, which is communicated with the pretreatment adsorption tank 2 through a first feeding pipe 24.

[0049] In a specific implementation, the adsorbent to be added in the pretreatment adsorption tank is a mixture of diatom ooze, graphite powder and calcium oxide for adsorbing and treating the pollutants in a suspended or floating state, including pectin and CODcr.

[0050] In a specific implementation, the diatom ooze, graphite powder and calcium oxide are uniformly mixed by a mixer and then delivered to the feeding buffer tank 11 for standby, the feeding buffer tank 11 is communicated with the pretreatment adsorption tank 2 through a feeding pipe 24, and a plug valve is arranged on the feeding pipe 24 to control the addition amount of the adsorbent.

[0051] A first flow meter 16 is arranged on the pipeline communicated between the conditioning tank 1 and the pretreatment adsorption tank 2, and the addition amount of the adsorbent is controlled according to the flow of the first flow meter 16. In a specific implementation, the ratio of the addition amount of the adsorbent to the wastewater delivered to the pretreatment adsorption tank 2 is 5-10 g / L.

[0052] The oxidation tank 4 is communicated with a hydrogen peroxide storage tank 9 through a pipeline, and the hydrogen peroxide storage tank 9 delivers hydrogen peroxide liquid to the oxidation tank 4 through a pipeline. The hydrogen peroxide liquid delivered to the oxidation tank 4 by the hydrogen peroxide storage tank 9 is used as an oxidizing agent to oxidize and crack the organic matters in the wastewater. In a specific implementation, hydrogen peroxide liquid with a concentration of 30% can be used.

[0053] A second flow meter 17 is arranged on the pipeline communicated between the filter 3 and the oxidation tank 4, and a third flow meter 18 is arranged on the pipeline communicated between the hydrogen peroxide storage tank 9 and the oxidation tank 4, so as to respectively monitor and control (through corresponding control valves) the flow of the wastewater and the hydrogen peroxide liquid delivered to the oxidation tank 4. In a specific implementation, the ratio of the addition amount of the hydrogen peroxide liquid to the wastewater is 1-5 g / L.

[0054] The pH conditioning tank 5 is communicated with an acid storage tank 12 through a pipeline, and the acid storage tank 12 delivers acid liquid to the pH conditioning tank 5 through a pipeline.

[0055] The conditioning tank 1, the pretreatment adsorption tank 2, the oxidation tank 4 and the pH conditioning tank 5 are all provided with agitators 13, the conditioning tank 1 is further provided with a liquid level meter 20, and the pH conditioning tank 5 is further provided with an online pH meter.

[0056] The filter 3 is a stacked screw filter or a plate filter.

[0057] Embodiment 2: A coffee primary processing wastewater resource utilization treatment method of embodiment 1 is adopted, which comprises the following steps (as shown in Figure 1

[0058] S1: The peeling wastewater, fermentation wastewater and cleaning wastewater generated in the primary processing of coffee fresh fruits are mixed uniformly after removing residues and adjusted;

[0059] S2: The wastewater in S1 is pre-adsorbed by using an adsorbent; in this step, the adsorbent is made by mixing diatom mud, graphite powder and calcium oxide, and the ratio of the adsorbent to the wastewater is 5-10 g / L.

[0060] The amount of diatom mud, graphite powder and calcium oxide in this step can be referred to the following amount:

[0061] Diatom mud: 30-45%;

[0062] Graphite powder: 30-35%;

[0063] Calcium oxide: 20-40%; wherein calcium oxide can be replaced by calcium hydroxide.

[0064] The amount of each component of the adsorbent in this embodiment is verified by test that if it is too low, it cannot effectively adsorb and remove colloids and organic matter, resulting in an increase in COD and difficulty in filtration; and if it is too high, it will waste the cost of reagents and increase the operation cost.

[0065] S3: The wastewater after adsorption treatment is filtered, and the sludge after filtration is composted and fermented;

[0066] S4: The liquid material after filtration in step S3 is added with a chemical oxidizing agent for oxidation treatment;

[0067] In this step, a 30% hydrogen peroxide solution is used as the chemical oxidizing agent, and the amount of the chemical oxidizing agent added to the wastewater is 1-5 g / L.

[0068] In this step, if the amount of the chemical oxidizing agent is not properly controlled, too low will result in poor removal effect of COD and water color, and too high will not only increase the cost of reagents, but also will result in too high oxidation potential of the water body, which will seriously affect the sludge sedimentation effect and microbial activity in the subsequent AO biochemical reaction and MBR membrane biological reaction.

[0069] S5: The wastewater after oxidation treatment is adjusted in pH; in this step, sulfuric acid can be used to adjust the pH value of the wastewater to 7.5-8.5, and preferably the pH value of the wastewater is constant at 7.5, too high or too low will affect the AO biochemical reaction, resulting in poor COD removal rate and unable to meet the water inlet requirement of MBR, which will seriously affect the water quality of MBR outlet.

[0070] ​S6: The wastewater of S5 is subjected to AO biochemical reaction treatment;

[0071] The control parameters of the AO biochemical reaction in this step are as follows:

[0072] The hydraulic retention time of the anaerobic tank is controlled at 1-2 hours, the temperature is controlled at 35-37℃, and the pH is controlled at 6.8-7.5; the microorganisms attached in the biological filler tank in the anaerobic tank include but are not limited to methanogens and acidifying bacteria.

[0073] The hydraulic retention time of the aerobic tank is controlled at 3-6 hours, the concentration of dissolved oxygen is controlled at 1-3 mg / l, the temperature is controlled at 20-35℃, the pH is controlled at 7-8, and the TSS concentration of the effluent is less than 50 mg / l.

[0074] S7: The wastewater treated in S6 is subjected to MBR membrane biological reaction treatment, and the treated wastewater can be reused or directly discharged.

[0075] The control parameters of the MBR membrane biological reaction in this step can be referred to as follows:

[0076] Chemical oxygen demand (COD) is less than 1000 mg / L;

[0077] Five-day biochemical oxygen demand (BOD5) is less than 300 mg / L;

[0078] Suspended solids (TSS) is less than 150 mg / L;

[0079] Ammonia nitrogen is less than 50 mg / L;

[0080] pH is 6-9.

[0081] Animal and vegetable oils: (n-Hex) is less than 30 mg / L and mineral oil (n-Hex) is less than 3 mg / L (there is no problem of oil in coffee primary processing wastewater)

[0082] The above control parameters can be achieved after adsorption treatment, pH adjustment, chemical oxidation, and AO reaction treatment.

[0083] The sludge treated in S6 and S7 is sent to the conditioning tank 1 for further treatment, and zero solid waste discharge can be achieved.

[0084] Example 3: The coffee fresh fruit processing wastewater of a Pu'er company is treated by the method of the present application and the system of Example 1. The wastewater sample before treatment is detected. The coffee fresh fruit processing wastewater is acidic with a pH value of 4. The chemical oxygen demand (CODcr), five-day biochemical oxygen demand (BOD5), and suspended solids (SS) content of the second type of pollutants in the wastewater are high, far higher than the maximum allowable discharge concentration of the second type of pollutants in the "Integrated Wastewater Discharge Standard". Meanwhile, the pectin content in the wastewater is very high. The main water quality concentration and the specific indicators of the first discharge standard of the "Integrated Wastewater Discharge Standard" GB8978-1996 are shown in Table 1.

[0085] Table 1: Water quality and discharge standards of coffee fresh fruit processing wastewater

[0086]

[0087] The coffee fresh fruit processing wastewater of the Pu'er company in this example is treated by the treatment system of Example 1 and the process flow of the present application. In step S2, the dosage of the adsorbent is 5 g / L. After filtration by the filter, all particulate matter, most pectin, CODcr, and colority can be removed from the wastewater.

[0088] After treatment, the water quality of the wastewater is significantly improved. The appearance of the water sample is Figure 6 . The detection index results are shown in Table 2.

[0089] Table 2: Water quality data of the wastewater treated by the present application

[0090]

[0091] As can be clearly seen from the table, the main pollution factors in the wastewater treated by the present application meet the first discharge standard of the "Integrated Wastewater Discharge Standard" GB8978-1996.

[0092] The present application and its embodiments have been described above, which is not restrictive. The embodiments shown in the drawings are only one of the embodiments of the present application, and the actual structure is not limited thereto. In general, if a person skilled in the art is inspired by it, without departing from the purpose of the present application, without creative design, similar structural methods and embodiments can be designed, which should belong to the protection scope of the present application.

Claims

1. A coffee primary processing wastewater resource treatment method, characterized in that, it comprises the following steps: S1: the peeling wastewater, fermentation wastewater and cleaning wastewater generated in coffee primary processing are mixed uniformly after deslagging and adjusted; S2: the wastewater in S1 is pretreated by adsorbent; the adsorbent is made of diatom ooze 30-45%, graphite powder 30-35%, calcium oxide or calcium hydroxide 20-40%, and the ratio of the adsorbent to the wastewater is 5-10 g / L; S3: the wastewater after adsorption treatment is filtered, and the sludge after filtration is composted and fermented; S4: the liquid material after filtration in step S3 is added with chemical oxidant for oxidation treatment; the chemical oxidant is hydrogen peroxide solution; S5: the wastewater after oxidation treatment is adjusted in pH; S6: the wastewater in S5 is treated by AO biochemical reaction; S7: the wastewater after treatment in S6 is treated by MBR membrane biological reaction. In step S5, the pH value of the wastewater is adjusted to 7.5-8.5 by sulfuric acid.

2. The method according to claim 1, characterized in that, In step S4, the chemical oxidant is hydrogen peroxide solution with a concentration of 30%, and the ratio of the amount of the chemical oxidant to the wastewater is 1-5 g / L.

3. The method according to claim 1, wherein the coffee primary processing wastewater is treated by the method of resource utilization, characterized in that, It comprises an adjusting tank, a pretreatment adsorption tank, a filter, an oxidation tank, a pH adjusting tank, an AO biochemical tank and an MBR membrane biological reaction tank; 4. A coffee primary processing wastewater resourceful treatment system for implementing the coffee primary processing wastewater resourceful treatment method according to any one of claims 1 to 3, characterized in that, The material in the adjusting tank is transported to the pretreatment adsorption tank through a pipeline, the material in the pretreatment adsorption tank is transported to the filter for filtration, the liquid material after filtration in the filter is transported to the oxidation tank for oxidation, the liquid material after oxidation in the oxidation tank is transported to the pH adjusting tank, the material in the pH adjusting tank is transported to the AO biochemical tank through a pipeline, and the liquid material in the AO biochemical tank is transported to the MBR membrane biological reaction tank through a pipeline. The sludge material in the AO biochemical tank is transported to the adjusting tank by a first sludge pump, and the sludge material in the MBR membrane biological reaction tank is transported to the adjusting tank by a second sludge pump.

5. A coffee primary processing wastewater resourceful treatment system according to claim 4, characterized in that, It further comprises a composting tank, and the solid sludge after filtration in the filter is transported to the composting tank.

6. The coffee primary processing wastewater resourceful treatment system according to claim 4, characterized in that, The oxidation tank is connected with a hydrogen peroxide storage tank through a pipeline, and the hydrogen peroxide storage tank transports hydrogen peroxide solution to the oxidation tank through a pipeline.

7. The coffee primary processing wastewater resourceful treatment system according to claim 4, characterized in that, The filter is a stacked screw filter or a plate filter.

8. The coffee primary processing wastewater resourceful treatment system according to claim 4, characterized in that, ​

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