High-salinity wastewater treatment system

Abstract

The utility model discloses a high-salinity wastewater treatment system. The high-salinity wastewater treatment system comprises a treatment box, a gas production assembly and a slag removal assembly, the treatment box is provided with a treatment cavity, the treatment cavity comprises a baffling area, an air flotation area and a slag removal area which are sequentially arranged in the length direction of the treatment box, the baffling area is provided with a flow channel extending in a zigzag mode, and the liquid outlet end of the flow channel is communicated with the air flotation area; a partition plate is arranged between the air flotation area and the slag removal area, and the height of the partition plate is lower than that of the liquid outlet end of the runner; the gas production assembly comprises an electrode plate arranged in the air floatation area; the deslagging assembly is partially arranged in the deslagging area and used for removing scum on the surface of liquid in the deslagging area. The mixed solution is fully mixed in the flow channel and then flows into the air flotation area, gas generated by electrolyte of an electrode plate in the air flotation area makes contact with suspended solids in the mixed solution, the suspended solids float upwards to form scum, the scum flows into the scum removal area along with the mixed solution, and then the scum on the surface of the solution is removed through the scum removal assembly. Therefore, suspended matters and liquid can be effectively separated, and the impurity removal effect is improved.

Description

Technical Field

[0001] This application belongs to the technical field of wastewater treatment, and specifically relates to a high-salt wastewater treatment system. Background Art

[0002] High-salt wastewater refers to wastewater with a total salt content greater than 1% (calculated as sodium chloride), and its main sources include: coal chemical industry, seawater desalination brine, mother liquor of battery preparation, wet smelting wastewater, concentrated water of recycled water, and high-concentration brine, etc. Low-concentration high-salt wastewater with a salt content of 1%-10% can be treated by reverse osmosis membrane concentration and reduction. Ultra-high-salt wastewater with a concentration greater than 10% usually adopts thermal evaporation crystallization to obtain refined salt or miscellaneous salt.

[0003] Ultra-high-salt wastewater before entering evaporation crystallization often undergoes chemical precipitation or flocculation precipitation for purification and impurity removal. As the salt content increases, the sedimentation rate of the flocs formed during the precipitation process decreases, and even some flocs do not settle, resulting in a large amount of suspended solids in the water and ineffective separation, which affects the impurity removal effect. Summary of the Utility Model

[0004] The technical problem to be solved by this application is that the existing precipitation method cannot effectively separate suspended solids, which affects the impurity removal effect. To solve the above technical problem, a high-salt wastewater treatment system capable of improving the impurity removal effect is provided.

[0005] The technical solution proposed by this application is as follows:

[0006] A high-salt wastewater treatment system includes:

[0007] A treatment tank with a treatment chamber, the treatment chamber includes a baffle zone, a flotation zone, and a slag removal zone arranged in sequence along the length direction of the treatment tank. The baffle zone is provided with a tortuous flow channel, and the liquid outlet end of the flow channel is communicated with the flotation zone; a partition is provided between the flotation zone and the slag removal zone, and the height of the partition is lower than the height of the liquid outlet end of the flow channel.

[0008] A gas production assembly, including electrode plates arranged in the flotation zone, and the electrode plates are used to electrolyze the liquid in the flotation zone to generate gas.

[0009] A slag removal assembly, partially arranged in the slag removal zone, is used to remove the floating slag on the liquid surface in the slag removal zone.

[0010] Further, the high-salt wastewater treatment system further includes a liquid supply component, a chemical supply component, and a mixer. The liquid supply component and the chemical supply component are both connected to the mixer. The liquid supply component is capable of transporting the stock solution to the mixer. The mixer is capable of sucking in the chemicals in the chemical supply component and mixing the chemicals with the stock solution to form a mixed solution. The mixer is communicated with the liquid inlet end of the flow channel to input the mixed solution into the flow channel.

[0011] Further, the mixer is a Venturi injector.

[0012] Further, the liquid supply component includes a liquid storage tank, a water pump, and a first flowmeter. The water pump is used to pump the stock solution in the liquid storage tank to the mixer, and the first flowmeter is used to detect the flow rate of the stock solution transported to the mixer.

[0013] Further, the chemical supply component includes a chemical storage tank and a second flowmeter. The chemical storage tank is connected to the mixer, and the second flowmeter is used to detect the flow rate of the chemicals sucked in by the mixer.

[0014] Further, the high-salt wastewater treatment system further includes a plurality of first baffle plates and a plurality of second baffle plates;

[0015] The plurality of first baffle plates are arranged at intervals along the length direction of the treatment tank at the bottom of the baffle area, and each first baffle plate is spaced from the top of the baffle area to divide the baffle area into a plurality of overflow tanks; the plurality of second baffle plates are arranged at intervals along the length direction of the treatment tank at the top of the baffle area, and each second baffle plate can extend into a corresponding overflow tank and is spaced from the bottom of the overflow tank; the height of the partition plate is lower than the height of the first baffle plate.

[0016] Further, an overflow hole is provided on the first baffle plate close to the partition plate. The overflow hole is used to conduct the flow channel and the flotation area, and the height of the overflow hole is higher than the height of the partition plate.

[0017] Further, the high-salt wastewater treatment system further includes a cleaning component. The cleaning component is partially located in the flotation area, and the cleaning component is used to spray cleaning liquid towards the electrode plate.

[0018] Further, the slag removal component includes a slag scraper, a slag collection tank, a slag discharge pipe, and a filter press. The slag scraper and the slag collection tank are both arranged in the slag removal area, and the slag scraper can scrape the floating slag on the liquid surface in the slag removal area into the slag collection tank. The two ends of the slag discharge pipe are respectively connected to the slag collection tank and the filter press.

[0019] Further, the high-salt wastewater treatment system further includes a liquid supply assembly for providing a stock solution; the liquid outlet end of the filter press is connected to the liquid supply assembly.

[0020] With the above high-salt wastewater treatment system, after the mixed solution is fully mixed in the flow channel, it flows into the air flotation zone. The gas generated by electrolyzing the liquid by the electrode plates in the air flotation zone contacts the suspended solids in the mixed solution, causing the suspended solids to float to form scum. The scum flows into the slag removal zone along with the mixed solution, and then the scum on the surface of the solution is removed by the slag removal assembly. In this way, it can ensure that the medicament and the stock solution fully react to form suspended solids, and at the same time, gas is generated in the air flotation zone to ensure that the suspended solids in the solution float, and then slag removal is carried out in the slag removal zone, realizing the effective separation of the suspended solids and the liquid and improving the impurity removal effect. Description of the Drawings

[0021] The drawings are used to provide a further understanding of the present application and constitute a part of the specification. They are used together with the embodiments of the present application to explain the present application and do not constitute a limitation to the present application.

[0022] Figure 1 It is a schematic structural diagram of a high-salt wastewater treatment system provided by an embodiment of the present application.

[0023] Label Description:

[0024] 110, treatment tank; 111, baffle zone; 112, air flotation zone; 113, slag removal zone; 114, liquid inlet; 115, recess; 116, slag discharge port; 117, liquid outlet; 121, partition board; 122, first baffle; 1221, overflow hole; 123, overflow tank; 124, second baffle; 131, electrode plate; 132, power supply; 140, slag removal assembly; 141, slag scraper; 142, slag collection tank; 143, slag discharge pipe; 144, filter press; 150, liquid supply assembly; 151, liquid storage tank; 152, water pump; 153, first flowmeter; 160, medicament supply assembly; 161, medicament storage tank; 162, second flowmeter; 170, mixer; 181, sprayer; 182, cleaning pump. Detailed Embodiments

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present application belong to the scope of protection of the present application.

[0026] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0027] The present application provides a high-salt wastewater treatment system for pre-treating high-salt wastewater, and the high-salt wastewater treatment system can effectively remove impurities in the high-salt wastewater. Among them, the high-salt wastewater can be battery wastewater, wastewater in the field of brine refining or coal chemical industry.

[0028] As Figure 1 shown, the high-salt wastewater treatment system includes a treatment tank 110. The treatment tank 110 includes a treatment chamber, and the treatment chamber includes a baffle zone 111, a flotation zone 112 and a slag removal zone 113 arranged in sequence along the length direction of the treatment tank 110. The baffle zone 111 is provided with a tortuously extending flow channel, the liquid outlet end of the flow channel is communicated with the flotation zone 112, and a partition plate 121 is arranged between the flotation zone 112 and the slag removal zone 113, and the height of the partition plate 121 is lower than the height of the liquid outlet end of the flow channel.

[0029] It should be noted that before the raw liquid is input into the treatment tank 110, a medicament needs to be added to the raw liquid to form a mixed solution, that is, the liquid input into the liquid inlet end of the flow channel is the mixed solution. Among them, the medicament can be liquid caustic soda, flocculant, precipitant or heavy metal scavenger, and is preferably a liquid. The mixed solution flows into the flotation zone 112 through the flow channel, and after the liquid level height is higher than the height of the partition plate 121, the liquid overflows into the slag removal zone 113. Since the flow channel extends tortuously, the mixed solution can be fully mixed in the flow channel to ensure the coagulation effect of the medicament.

[0030] Furthermore, the high-salt wastewater treatment system further includes a gas production component and a slag removal component 140. The gas production component includes an electrode plate 131 arranged in the flotation zone 112. The electrolytic plate is used to electrolyze the liquid in the flotation zone 112 to generate gas, and the gas contacts the suspended matter in the liquid to make the suspended matter float to form scum, and the scum overflows into the slag removal zone 113 along with the liquid. The slag removal component 140 is partially arranged in the slag removal zone 113 and is used to remove the scum on the liquid surface in the slag removal zone 113.

[0031] With the above high-salt wastewater treatment system, the mixed solution flows into the air flotation zone 112 after being fully mixed in the flow channel. The gas generated by the electrolysis of the liquid by the electrode plate 131 in the air flotation zone 112 contacts the suspended solids in the mixed solution, causing the suspended solids to float to form scum. The scum flows into the slag removal zone 113 along with the mixed solution, and then the scum on the surface of the solution is removed by the slag removal assembly 140. In this way, it can ensure that the medicament reacts fully with the original solution to form suspended solids, and at the same time generate gas in the air flotation zone 112 to ensure that the suspended solids in the solution float, and then remove the slag in the slag removal zone 113, realizing the effective separation of the suspended solids and the liquid and improving the impurity removal effect.

[0032] In one embodiment, the high-salt wastewater treatment system further includes a liquid supply assembly 150, a medicament supply assembly 160 and a mixer 170. The liquid supply assembly 150 and the medicament supply assembly 160 are both connected to the mixer 170. The liquid supply assembly 150 can transport the original solution to the mixer 170. The mixer 170 can suck in the medicament from the medicament supply assembly 160 and mix the medicament with the original solution to form a mixed solution. The mixer 170 is also connected to the treatment tank 110 and communicates with the liquid inlet end of the flow channel to input the mixed solution into the flow channel.

[0033] Preferably, the mixer 170 is a Venturi injector. The original solution flows into the Venturi injector. According to the Venturi effect, the flowing original solution generates an adsorption effect on the medicament in the medicament supply assembly 160, thereby sucking the medicament into the original solution for preliminary mixing. In the traditional method, the original solution and the medicament need to be mixed by stirring. In this application, the original solution and the medicament are preliminarily mixed by the Venturi injector, and then flow into the tortuously extending flow channel for full mixing, without considering the corrosion problem of the stirring paddle, nor the need to set up power equipment to drive the stirring paddle to move, reducing the maintenance loss and energy consumption.

[0034] In one embodiment, the liquid supply assembly 150 includes a liquid storage tank 151, a water pump 152 and a first flow meter 153. The liquid storage tank 151 is used to store the original solution. The water pump 152 is used to pump the original solution in the liquid storage tank 151 to the mixer 170. The first flow meter 153 is used to detect the flow rate of the original solution transported to the mixer 170.

[0035] Further, the medicament supply assembly 160 includes a medicament storage tank 161 and a second flow meter 162. The medicament storage tank 161 is used to store the medicament. The mixer 170 is connected to the medicament storage tank 161 to extract and suck in the medicament in the medicament storage tank 161. The second flow meter 162 is used to detect the flow rate of the medicament sucked in by the mixer 170. It can be determined that the above mixer 170 can adjust the flow rates of the original solution and the medicament according to the detection results of the first flow meter 153 and the second flow meter 162.

[0036] In one embodiment, the high-salt wastewater treatment system further includes a plurality of first baffle plates 122 and a plurality of second baffle plates 124. The plurality of first baffle plates 122 are arranged at intervals along the length direction of the treatment tank 110 at the bottom of the baffle area 111, and each first baffle plate 122 is spaced from the top of the baffle area 111 to divide the baffle area 111 into a plurality of overflow tanks 123; the plurality of second baffle plates 124 are arranged at intervals along the length direction of the treatment tank 110 at the top of the baffle area 111, and each second baffle plate 124 can extend into a corresponding overflow tank 123 and is spaced from the bottom of the overflow tank 123 to form the above-mentioned tortuously extending flow channel, so that the mixed solution is fully mixed in the flow channel.

[0037] It can be understood that, as Figure 1 shown, the mixed solution in the flow channel flows in adjacent overflow tanks 123 by means of overflow and flows into the air flotation area 112 by means of overflow. Preferably, the height of the partition plate 121 is lower than the height of the first baffle plate 122 to ensure that the liquid level in the air flotation area 112 is lower than the height of the first baffle plate 122, thereby preventing the solution in the air flotation area 112 from flowing back to the baffle area 111. Similarly, the treatment tank 110 is provided with a liquid inlet 114 communicating with the treatment chamber, the mixer 170 is communicated with the liquid inlet 114, and the height of the liquid inlet 114 in the mixing chamber is higher than the height of the first baffle plate 122.

[0038] In one embodiment, the first baffle plate 122 close to the partition plate 121 is provided with an overflow hole 1221. The overflow hole 1221 is used to conduct the flow channel and the air flotation area 112, and the height of the overflow hole 1221 is higher than the height of the partition plate 121. Compared with the solution overflowing into the air flotation area 112 through the top of the first baffle plate 122, when the solution flows into the air flotation area 112 through the overflow hole 1221, the impact on the air flotation area 112 can be effectively weakened, so that the bubble diameter generated by electrolysis is uniform (10 - 30 μm), the mass transfer efficiency is high, and the suspension in the solution can be effectively promoted to agglomerate and float. Optionally, the number of the overflow holes 1221 is multiple, and the multiple overflow holes 1221 are arranged at equal intervals along the width direction of the first baffle plate 122, that is Figure 1 the direction perpendicular to the paper surface in the figure, and the aperture of the overflow hole 1221 is 10 - 20 cm, and the distance between two adjacent overflow holes 1221 is 20 - 30 cm.

[0039] In one embodiment, the gas generation assembly further includes a power supply 132, and the power supply 132 is electrically connected to the electrode plate 131. In Figure 1 the shown embodiment, the electrode plate 131 is located in the lower space of the air flotation area 112 and is spaced 10 - 20 cm from the bottom of the air flotation area 112.

[0040] It is certain that the electrode plate 131 includes an anode plate and a cathode plate. The anode plates and the cathode plates are arranged alternately at equal intervals, and the distance between adjacent anode plates and cathode plates is 1-2 cm. In addition, in order to prevent the electrode plate 131 from being corroded, the electrode plate 131 is preferably made of a corrosion-resistant material. For example, the anode plate can be a platinum electrode or an electrode with a titanium metal oxide coating.

[0041] In one embodiment, the high-salt wastewater treatment system further includes a cleaning assembly. The cleaning assembly is partially located in the air flotation zone 112, and the cleaning assembly is used to spray a cleaning liquid toward the electrode plate 131 to clean the electrode plate 131, thereby removing the residues on the electrode plate 131 and extending the service life of the electrode plate 131. Preferably, the cleaning liquid is pure water.

[0042] Furthermore, the cleaning assembly includes a sprayer 181 and a cleaning pump 182. The sprayer 181 is arranged in the air flotation zone 112, and the sprayer 181 is arranged facing the electrode plate 131 to spray the cleaning liquid onto the electrode plate 131. The cleaning pump 182 is connected to the sprayer 181 and is used to pump pure water into the sprayer 181.

[0043] In one embodiment, a recess 115 is provided at the bottom of the air flotation zone 112. A slag discharge port 116 is opened at the bottom end of the recess 115, and a slag discharge valve is provided at the slag discharge port 116. Before cleaning the electrode plate 131, the solution in the air flotation zone 112 can be pumped into the slag removal zone 113 by a transfer pump. After the pumping is completed, residues will accumulate in the recess 115. At this time, the slag discharge valve can be opened, and the residues can be discharged through the slag discharge port 116. Specifically, in Figure 1 the illustrated embodiment, the recess 115 is in an inverted conical shape. In addition, the cleaning liquid and the remaining substances after cleaning the electrode plate 131 can remain in the air flotation zone 112 to continue the wastewater treatment. The cleaning liquid can be mixed with the solution flowing into the air flotation zone 112 without affecting the impurity removal of the solution.

[0044] It should be noted that the distance between the above-mentioned electrode plate 131 and the bottom of the air flotation zone 112 refers to the height difference between the electrode plate 131 and the highest point of the recess 115.

[0045] In one embodiment, the slag removal assembly 140 includes a slag scraper 141, a slag collection tank 142, a slag discharge pipe 143 and a filter press 144. The slag scraper 141 and the slag collection tank 142 are both arranged in the slag removal zone 113, and the slag scraper 141 can scrape the scum on the liquid surface in the slag removal zone 113 into the slag collection tank 142. The two ends of the slag discharge pipe 143 are respectively connected to the slag collection tank 142 and the filter press 144 to transport the scum to the filter press 144 for filter pressing treatment.

[0046] Specifically, in Figure 1In the illustrated embodiment, the slag scraper 141 and the slag collection tank 142 are both located in the upper space of the slag removal area 113, and the height of the bottom of the slag scraper 141 does not exceed the height of the top of the partition 121, so as to ensure that the slag scraper 141 can contact the liquid surface and scrape away the floating slag on the liquid surface; at the same time, the position of the slag collection tank 142 corresponds to that of the slag scraper 141, so as to ensure the reception of the floating slag scraped by the slag scraper 141 and avoid the inflow of more solution.

[0047] Further, the liquid outlet end of the filter press 144 is connected to the liquid supply assembly 150 and also connected to the liquid storage tank 151, so as to convey the liquid generated by the filter press back to the liquid storage tank 151 for further treatment, avoid waste of water resources, and reduce costs. It can be understood that the filter press 144 also has an outlet for discharging residues.

[0048] In one embodiment, the treatment tank 110 is further provided with a liquid outlet 117 communicating with the treatment chamber, and the liquid outlet 117 is communicated with the bottom of the slag removal area 113, so as to discharge the purified water after slag removal in the slag removal area 113.

[0049] For the convenience of understanding the technical solution of the present application, hereby in combination with Figure 1 The process flow of the high-salt wastewater treatment system in the above embodiment is described as follows:

[0050] Initially, the temperature of the original liquid in the liquid storage tank 151 is 30 - 55 °C. Start the water pump 152, and the original liquid enters the mixer 170 through the first flowmeter 153. The mixer 170 sucks the medicament in the medicament storage tank 161, so that the original liquid and the medicament are preliminarily mixed to form a mixed solution. The mixed solution enters the flow channel and successively flows through a plurality of overflow tanks 123 in the flow channel. The residence time of the mixed solution in the flow channel is 10 min. Subsequently, the mixed solution flows into the air flotation area 112 through the overflow holes 1221. After the liquid level height in the air flotation area 112 reaches a certain height, the anode plate and the cathode plate are electrified to generate bubbles with a particle size of 10 - 30 μm. The bubbles adhere to the suspended substances in the solution, causing the suspended substances to float. The solution stays in the air flotation area 112 for 10 min and then overflows into the slag removal area 113. Similarly, after the liquid level height in the slag removal area 113 reaches the preset height, it is left standing for 20 min to ensure that the suspended substances completely float to form floating slag. The slag scraper 141 is started, runs for 1 min and then stops for 30 min, scrapes the floating slag into the slag collection tank 142, and then the floating slag enters the filter press 144 through the slag discharge pipe 143 for filter pressing. After filter pressing, the filter residue is discharged through one of the outlets, and the filtrate is conveyed to the liquid storage tank 151 through the other outlet.

[0051] Although embodiments of the present application have been shown and described, those of ordinary skill in the art will understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present application. The scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A high-salt wastewater treatment system, characterized in that, Comprising: A processing tank having a processing chamber, the processing chamber including a baffle zone, a flotation zone, and a slag removal zone arranged in sequence along the length direction of the processing tank, the baffle zone being provided with a tortuously extending flow channel, the liquid outlet end of the flow channel communicating with the flotation zone; a partition is provided between the flotation zone and the slag removal zone, and the height of the partition is lower than the height of the liquid outlet end of the flow channel; A gas production assembly, including electrode plates arranged in the flotation zone, the electrode plates being used for electrolyzing the liquid in the flotation zone to generate gas; A slag removal assembly, partially arranged in the slag removal zone, for removing the scum on the liquid surface in the slag removal zone.

2. The high-salt wastewater treatment system according to claim 1, wherein The high-salt wastewater treatment system further includes a liquid supply assembly, a chemical supply assembly, and a mixer. The liquid supply assembly and the chemical supply assembly are both connected to the mixer. The liquid supply assembly can transport the original liquid to the mixer. The mixer can inhale the chemical agent in the chemical supply assembly and mix the chemical agent with the original liquid to form a mixed solution. The mixer is connected to the liquid inlet end of the flow channel to input the mixed solution into the flow channel.

3. The high-salt wastewater treatment system according to claim 2, wherein The mixer is a Venturi injector.

4. The high-salt wastewater treatment system according to claim 2, characterized in that The liquid supply assembly includes a liquid storage tank, a water pump, and a first flow meter. The water pump is used to pump the original liquid in the liquid storage tank to the mixer, and the first flow meter is used to detect the flow rate of the original liquid transported to the mixer.

5. The high-salt wastewater treatment system according to claim 2, wherein The chemical supply assembly includes a chemical storage tank and a second flow meter. The chemical storage tank is connected to the mixer, and the second flow meter is used to detect the flow rate of the chemical agent inhaled by the mixer.

6. The high-salt wastewater treatment system according to claim 1, wherein, The high-salt wastewater treatment system further includes a plurality of first baffle plates and a plurality of second baffle plates; The plurality of first baffle plates are arranged at intervals along the length direction of the processing tank at the bottom of the baffle zone, and each first baffle plate is spaced from the top of the baffle zone to divide the baffle zone into a plurality of overflow tanks; the plurality of second baffle plates are arranged at intervals along the length direction of the processing tank at the top of the baffle zone, each second baffle plate can extend into a corresponding overflow tank and is spaced from the bottom of the overflow tank; the height of the partition is lower than the height of the first baffle plate.

7. The high-salt wastewater treatment system according to claim 6, characterized in that, The first baffle plate close to the partition is provided with an overflow hole, the overflow hole is used to conduct the flow channel and the flotation zone, and the height of the overflow hole is higher than the height of the partition.

8. The high-salt wastewater treatment system according to claim 1, characterized in that, The high-salt wastewater treatment system further includes a cleaning assembly, the cleaning assembly is partially located in the flotation zone, and the cleaning assembly is used to spray cleaning liquid towards the electrode plates.

9. The high-salt wastewater treatment system according to claim 1, wherein, The slag removal assembly includes a slag scraper, a slag collection tank, a slag discharge pipe, and a filter press. The slag scraper and the slag collection tank are both arranged in the slag removal zone, and the slag scraper can scrape the scum on the liquid surface in the slag removal zone into the slag collection tank. The two ends of the slag discharge pipe are respectively connected to the slag collection tank and the filter press.

10. The high-salt wastewater treatment system according to claim 9, wherein, The high-salt wastewater treatment system further includes a liquid supply assembly, the liquid supply assembly is used to provide the original liquid; the liquid outlet end of the filter press is connected to the liquid supply assembly.

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