CN113526670A - Water treatment filler composition, filler device and application thereof - Google Patents
Water treatment filler composition, filler device and application thereof Download PDFInfo
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- CN113526670A CN113526670A CN202110956031.4A CN202110956031A CN113526670A CN 113526670 A CN113526670 A CN 113526670A CN 202110956031 A CN202110956031 A CN 202110956031A CN 113526670 A CN113526670 A CN 113526670A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/308—Biological phosphorus removal
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
Abstract
The invention provides a water treatment filler composition, a filler device and application thereof. The water treatment filler composition comprises a water treatment filler A, a water treatment filler B, a water treatment filler C and a water treatment filler D; the water treatment filler A consists of polypropylene, calcium carbonate powder, basalt fiber, a coupling agent and a toughening agent; the water treatment filler B consists of poly (butylene succinate), poly (beta-hydroxybutyrate valerate), straw powder, a coupling agent and a plasticizer; the water treatment filler C consists of polypropylene, poly beta-hydroxybutyrate valerate, straw powder, a coupling agent, a foaming agent and a blowing aid; the water treatment filler D consists of polypropylene, high-density polyethylene, calcium carbonate, a toughening agent, calcite powder and a coupling agent. The water treatment filler composition realizes corresponding functional partitioning in a water treatment filler device through reasonable collocation and scientific combination, functions of all layers are complementary, a controllable rich ecological niche condition is formed, and the composite functional water treatment of rapid capture of a wastewater carbon source and synchronous removal of SS and nitrogen and phosphorus is realized.
Description
Technical Field
The invention belongs to the technical field of water treatment, and particularly relates to a composite functional water treatment filler composition capable of realizing wastewater carbon source capture and synchronous removal of SS (suspended substances) and nitrogen and phosphorus, a filler device and application thereof.
Background
With the rapid development of economy, environmental pollution caused by industrial and agricultural wastewater is increasingly serious, and the requirement of people on good water environment is continuously improved, so that the requirement on wastewater discharge quality is also increasingly improved. As the carbon and nitrogen content of municipal wastewater and other types of source water in China is generally low, the advanced treatment is difficult, and the nitrogen and phosphorus are deeply reduced to lack of carbon sources. Meanwhile, the common treatment measures such as an inclined plate sedimentation tank, a radial flow sedimentation tank and the like also have the defects of large occupied area, low hydraulic load, difficulty in removing fine suspended particles and the like.
The biofilm process is a process for realizing the enhanced treatment of wastewater by providing a carrier on which microorganisms are gathered and grown into a biofilm. Typical processes are biological contact oxidation, moving bed biofilm process (MBBR), depth filtration, etc. However, the existing process is generally single in function and lacks of the functions of synchronously removing solid particles and reducing nitrogen and phosphorus.
The filler is used as a carrier of microorganisms, is a place where the microorganisms inhabit and breed, plays a role in intercepting suspended matters in the operation process, is one of the cores of the biological aerated filter treatment technology, and the material composition and the surface performance of the filler directly influence the attachment, growth, breeding and activity of the microorganisms on the surface of the filler, thereby influencing the biofilm formation performance of the microorganisms and the pollutant degradation efficiency. Different fillers form different biological films, and the different biological film states cause the microbial ecology in the system to be different, thereby having great influence on the treatment efficiency of the reactor.
At present, sewage treatment filler commonly used in the industry is single and is usually made of engineering plastics. Besides the filler which can carry out simple physical adsorption, filtration or chemical reaction, no other filler which can carry out deeper treatment on the sewage exists. In order to solve the problems, the composite carrier formed by composite biodegradable polyester and other material components enriches microorganisms with different functions, and the removal of inorganic nitrogen becomes a feasible technical path. For example, publication No. CN107720978A reports an annular filler which adopts biodegradable polyester and other various composite components to realize the removal of ammonia nitrogen and total nitrogen in wastewater by forming an anaerobic-aerobic-anoxic microenvironment. The publication No. CN105802168A reports that the biodegradable polyester can be blended and granulated with various inorganic components, and proves that multi-component granulation is completely feasible. However, the filler disclosed in publication No. CN107720978A still has a single function (only inorganic nitrogen removal can be achieved), and synchronous removal of phosphorus and SS cannot be achieved. Meanwhile, the carbon source in the wastewater source cannot be captured and secondarily utilized, so that the treatment cost of unit wastewater cannot be reduced. The application scene of the publication No. CN105802168A mainly meets the application scene of the plastic (such as injection molding, film blowing and the like) industry, and the comprehensive effect formed by the component formula and the processing mode can not meet the functional requirement of sewage treatment.
Disclosure of Invention
Based on the problems in the prior art, the first purpose of the invention is to provide a composite functional water treatment filler composition capable of realizing wastewater carbon source capture and synchronous removal of SS and nitrogen and phosphorus; the second purpose of the invention is to provide a composite functional water treatment filler device which can realize the capture of wastewater carbon source and the synchronous removal of SS and nitrogen and phosphorus; the third purpose of the invention is to provide the application of the filling device in sewage treatment. The water treatment filler composition realizes corresponding functional partition in a water treatment filler device through reasonable collocation and scientific combination, functions of all layers are mutually linked and complemented, and a rich ecological niche condition which is artificially set and controllable in working condition is formed in the device, so that the composite functional water treatment of rapid capture of wastewater carbon source and synchronous removal of SS and nitrogen and phosphorus is realized.
In order to achieve the purpose, the invention adopts the following technical scheme:
in one aspect, the present invention provides a water treatment filler composition comprising a water treatment filler a, a water treatment filler B, a water treatment filler C, and a water treatment filler D;
the water treatment filler A is composed of polypropylene (PP), calcium carbonate powder, basalt fiber, a coupling agent and a toughening agent;
the water treatment filler B consists of Poly Butylene Succinate (PBS), poly beta hydroxybutyrate valerate (PHBV), straw powder, a coupling agent and a plasticizer;
the water treatment filler C consists of polypropylene (PP), poly beta-hydroxybutyrate valerate (PHBV), straw powder, a coupling agent, a foaming agent and a blowing aid;
the water treatment filler D consists of polypropylene (PP), high-density polyethylene, calcium carbonate, a toughening agent, calcite powder and a coupling agent.
In the water treatment filler composition, the mesh number of the calcium carbonate powder is preferably 1250-2500 meshes; the mesh number of the straw powder is 150-500 meshes; the mesh number of the calcium carbonate is 400-1200 meshes; the mesh number of the calcite powder is 400-1200 meshes.
In the above water-treated filler composition, the coupling agent preferably includes a silane coupling agent KH550 and/or an aluminum titanate coupling agent, but is not limited thereto.
In the above water treatment filler composition, preferably, the toughening agent includes POE dow 7270, but is not limited thereto.
In the above water treatment filler composition, preferably, the plasticizer includes one or more of epoxidized soybean oil, erucamide, and citrate, but is not limited thereto.
In the above water-treated filler composition, preferably, the foaming agent includes azodicarbonamide, but is not limited thereto.
In the above water treatment filler composition, preferably, the co-blowing agent includes urea, but is not limited thereto.
In the above water treatment filler composition, preferably, the water treatment filler a comprises, in parts by weight:
55-75 parts of polypropylene, 10-18 parts of calcium carbonate powder, 10-20 parts of basalt fiber, 2-3 parts of coupling agent and 1-3 parts of toughening agent.
In the above water treatment filler composition, preferably, the water treatment filler B includes, in parts by weight:
30-50 parts of polybutylene succinate, 1-5 parts of poly beta-hydroxybutyrate valerate, 30-50 parts of straw powder, 2-3 parts of coupling agent and 0.5-1 part of plasticizer.
In the above water treatment filler composition, preferably, the water treatment filler C includes, in parts by weight:
30-50 parts of polypropylene, 1-5 parts of poly beta-hydroxybutyrate valerate, 30-50 parts of straw powder, 2-3 parts of coupling agent, 2-4.5 parts of foaming agent and 0.5-1 part of urea.
In the above water treatment filler composition, preferably, the water treatment filler D includes, in parts by weight:
20-30 parts of polypropylene, 20-30 parts of high-density polyethylene, 10-15 parts of calcium carbonate, 10 parts of a toughening agent, 15 parts of calcite powder and 2-3 parts of a coupling agent.
In the above water treatment filler composition, preferably, the water treatment filler a is extruded and granulated by a parallel co-rotating twin-screw extruder under the following process conditions: the raw materials are fully and uniformly mixed by a high mixer and a low mixer, the rotating speed of the high mixer is 800-1200 rpm, the running time is 10-25 min, the rotating speed of the low mixer is 450-650 rpm, the running time is 5-20 min, and the L/D of a screw is required to be more than 48 by a double-screw machine; the granulation mode is die surface water ring cutting.
In the above water treatment filler composition, preferably, the water treatment filler B is extruded and granulated by a parallel co-rotating twin-screw extruder under the following process conditions: the raw materials are fully and uniformly mixed by a high mixer and a low mixer, the rotating speed of the high mixer is 800-1200 rpm, the running time is 10-25 min, the rotating speed of the low mixer is 450-650 rpm, the running time is 5-20 min, the L/D of a screw is required to be greater than 52 by a double screw machine, and the processing temperature is less than 155 ℃; the granulation mode is die surface water ring cutting.
In the above water treatment filler composition, preferably, the water treatment filler C is granulated by using a reaction kettle, and the process conditions are as follows: the temperature is 120-190 ℃, the pressure is 1.0-2.5 MPa, and the reaction time is 1-3 min; the granulation mode is underwater strand cutting and granulation after melt pump extrusion.
In the above water treatment filler composition, preferably, the water treatment filler D is extruded and granulated by a parallel co-rotating twin-screw extruder under the following process conditions: the raw materials are fully and uniformly mixed by a high mixer and a low mixer, the rotating speed of the high mixer is 800-1500 rpm, the running time is 10-30 min, the rotating speed of the low mixer is 450-650 rpm, the running time is 15min, the L/D of a screw is required to be more than 48 by a double screw machine, and the processing temperature is less than 195 ℃; the mode is that die surface water is circularly cut, the filler D after granulation is put into 3ppm HCl solution, and the filler D is naturally dried after being soaked and washed for 10-25 min.
On the other hand, the invention also provides a water treatment filling device which is of an annular columnar structure and comprises an outer ring filling unit and an inner ring filling unit; the water treatment filler composition is filled, and specifically comprises the following components:
the outer ring packing unit is sequentially filled with a water treatment packing A, a water treatment packing B and a water treatment packing C from the water flow direction; the inner ring packing unit is filled with water treatment packing D; the water flow flowing out from the outer ring packing unit enters the inner ring packing unit.
In the above water treatment filling device, preferably, the volume ratio of the outer ring filling unit to the inner ring filling unit is 1: 1-1.5; the volume ratio of the water treatment filler A, the water treatment filler B and the water treatment filler C in the outer ring filler unit is 30-40 percent, 40-50 percent and 10-30 percent; the volume ratio of the water treatment filler D in the inner ring filler unit is 60-75%. The respective raw material proportions of the four fillers can be controlled to be granulated according to different proportions according to actual process requirements so as to meet the requirements of different wastewater treatment processes.
In still another aspect, the present invention also provides the use of the above-described water treatment filler composition or water treatment filler device in sewage treatment.
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) the water treatment filler composition realizes corresponding functional partition in a water treatment filler device through reasonable collocation and scientific combination, functions of all layers are mutually linked and complemented, and a rich ecological niche condition which is artificially set and controllable in working condition is formed in the device, so that the composite functional water treatment of rapid capture of wastewater carbon source and synchronous removal of SS and nitrogen and phosphorus is realized.
(2) The water treatment filler A can intercept a large amount of solid particles on the bottom layer, so that the rapid capture of a carbon source is synchronously realized; because the filler A is positioned at the lower layer of the filler B, the functional microorganism (such as denitrifying bacteria and the like) biomembrane periodically dropped off by the filler B falls to the filler layer A, and the SS can be removed and the part of the carbon source can be deeply utilized in situ by controlling the retention time of the reaction water power of the device, thereby realizing the denitrification effect.
(3) The poly (butylene succinate) PBS and the straw powder contained in the water treatment filler B can be used as a slow-release carbon source to realize synchronous removal of nitrogen and phosphorus through aerobic denitrification, anoxic denitrification and denitrifying phosphorus removal, and an endogenous carbon source of wastewater intercepted by the filler A rises through water flow and is also brought into the filler B layer, so that the denitrifying nitrogen removal and denitrifying phosphorus removal effects of the filler B are enhanced; meanwhile, the part of carbon source is introduced, so that the consumption of the biodegradable polyester in the filler B is reduced, and the overall operation and maintenance cost is reduced.
(4) The water treatment filler C is a light foaming filler, and the slowly-released unutilized carbon source of the filler B can be recycled by being intercepted by the layer, so that the biological nitrogen and phosphorus removal effect is enhanced, and the SS and nitrogen and phosphorus concentrations of effluent are further reduced; meanwhile, the running state of the device is suspended, so that the head loss is reduced, and the overall energy consumption is reduced.
(5) The water treatment filler D of the invention is a structure with a large number of holes formed on the surface due to acid washing and pore forming; the wastewater finally enters the filler D layer after passing through the annular filler layer A, B, C, and the effluent SS can be thoroughly removed. The pore structure can also enrich a large amount of biological membranes, and the electrodeless nitrogen and phosphorus removal function is strengthened again, so that the final wastewater discharge reaching the standard is realized.
Drawings
FIG. 1 is a schematic structural diagram of a water treatment filler device capable of realizing wastewater carbon source capture and synchronous removal of SS and nitrogen and phosphorus in accordance with the present invention;
description of the symbols of the drawings:
1. the annular columnar main body structure of the water treatment filling device; 2. an outer ring packing unit; 3. water treatment filler A; 4. water treatment filler B; 5. water treatment filler C; 6. and (4) water treatment filler D.
Detailed Description
The invention will be further elucidated with reference to fig. 1 and the detailed description.
Example 1:
the embodiment provides a composite functional water treatment filler composition and a filler device capable of realizing wastewater carbon source capture and synchronous removal of SS (suspended solid) and nitrogen and phosphorus, and the filler composition and the filler device are specifically as follows:
the water treatment filler A comprises the following raw materials in parts by weight: 70 parts of polypropylene PP, 15 parts of 1250-mesh calcium carbonate powder, 10 parts of basalt fiber, 2 parts of coupling agent (silane coupling agent KH550) and 72703 parts of toughening agent POE Dow.
The water treatment filler B comprises the following components in parts by weight: 50 parts of Poly Butylene Succinate (PBS), 5 parts of poly beta hydroxybutyrate valerate (PHBV), 42 parts of 400-mesh straw powder, 2 parts of coupling agent (silane coupling agent KH550) and 1 part of plasticizer epoxidized soybean oil.
The water treatment filler C comprises the following components in parts by weight: 50 parts of polypropylene PP, 2 parts of poly beta-hydroxybutyrate valerate (PHBV), 43 parts of 400-mesh straw powder, 2 parts of coupling agent (silane coupling agent KH550), 2 parts of foaming agent (azodicarbonamide) and 1 part of auxiliary foaming agent (urea).
The water treatment filler D comprises the following components in parts by weight: 20 parts of polypropylene PP, 25 parts of high-density polyethylene HDPE, 10 parts of calcium carbonate of 800 meshes, 727010 parts of POE Dow, 15 parts of calcite powder of 500 meshes and KH 5502 parts of silane coupling agent.
The water treatment filler A is extruded and granulated by a parallel co-rotating twin-screw extruder, and the process conditions are as follows: the raw materials are fully and uniformly mixed by a high mixer and a low mixer, the rotating speed of the high mixer is 900rpm, the running time is 15min, the rotating speed of the low mixer is 500rpm, the running time is 15min, and the L/D of a screw rod required by a double-screw machine is 52; the granulation mode is die surface water ring cutting;
the water treatment filler B is extruded and granulated by a parallel co-rotating twin-screw extruder, and the process conditions are as follows: the raw materials are fully and uniformly mixed by a high-speed mixer and a low-speed mixer, wherein the rotating speed of the high-speed mixer is 1000rpm, the running time is 20min, the rotating speed of the low-speed mixer is 500rpm, the running time is 15min, a double-screw machine requires that the L/D of a screw is 56, and the processing temperature is 150 ℃; the granulation mode is die surface water ring cutting;
the water treatment filler C is granulated by adopting a reaction kettle, and the process conditions are as follows: the temperature is 130 ℃, 1min, 170 ℃, 2min, the pressure is 1.5MPa, 1min, 2.0MPa, 2min, and the reaction time is 3 min; the granulation mode is that underwater brace granulation is carried out after the extrusion of a melt pump;
the water treatment filler D is extruded and granulated by a parallel co-rotating twin-screw extruder, and the process conditions are as follows: the raw materials are fully and uniformly mixed by a high mixer and a low mixer, the rotation speed of the high mixer is 950rpm, the running time is 20min, the rotation speed of the low mixer is 600rpm, the running time is 15min, the L/D of a screw is 52 required by a double-screw machine, and the processing temperature is 180 ℃; the mode is that the die surface is cut circularly by water, the filler D after granulation is put into HCl solution with the concentration of 3ppm, and the filler D is soaked and washed for 15min and then naturally dried.
Filling a water treatment filler A, a water treatment filler B, a water treatment filler C and a water treatment filler D into a water treatment filler device, wherein the water treatment filler device is of an annular columnar structure and comprises an outer ring filler unit and an inner ring filler unit as shown in figure 1; the outer ring packing unit is sequentially filled with a water treatment packing A, a water treatment packing B and a water treatment packing C from the water flow direction; the inner ring packing unit is filled with water treatment packing D; the water flow flowing out from the outer ring packing unit enters the inner ring packing unit; in the embodiment, the volume ratio of the outer ring packing unit to the inner ring packing unit is 1:1.2, the volume ratio of the water treatment packing A, the water treatment packing B and the water treatment packing C in the outer ring packing unit is 30% to 40% to 10%, and the volume ratio of the water treatment packing D in the inner ring packing unit is 60%.
The water treatment filler device is used for treating municipal sewage 1 in a certain city, and the treatment effect is shown in the following table 1.
Table 1: treatment effect of water treatment filler device on municipal sewage 1
As can be seen from table 1: municipal sewage 1, NH is treated by utilizing the water treatment filler device4 +The removal efficiency of-N reaches 97.5 +/-2.3 percent, and NO3 -The N removal efficiency reaches 98.1 +/-1.8%, the TP removal rate is 89.1 +/-3.8%, and the SS removal rate is 95.2 +/-0.8%, so that the method has an efficient effect of removing nitrogen, phosphorus and SS, and can realize synchronous removal of the SS and the nitrogen and the phosphorus in the wastewater.
Example 2:
the embodiment provides a composite functional water treatment filler composition and a filler device capable of realizing wastewater carbon source capture and synchronous removal of SS (suspended solid) and nitrogen and phosphorus, and the filler composition and the filler device are specifically as follows:
the water treatment filler A comprises the following raw materials in parts by weight: 65 parts of polypropylene PP, 18 parts of 2000-mesh calcium carbonate powder, 12 parts of basalt fiber, 2 parts of coupling agent (silane coupling agent KH550) and 72703 parts of toughening agent POE Dow.
The water treatment filler B comprises the following components in parts by weight: 50 parts of Poly Butylene Succinate (PBS), 5 parts of poly beta hydroxybutyrate valerate (PHBV), 40 parts of 400-mesh straw powder, 2 parts of coupling agent (silane coupling agent KH550) and 1 part of plasticizer epoxidized soybean oil.
The water treatment filler C comprises the following components in parts by weight based on 100 parts of the filler C: 1 part of poly beta-hydroxybutyrate valerate (PHBV), 50 parts of polypropylene PP, 42 parts of 400-mesh straw powder, 2 parts of coupling agent (silane coupling agent KH550), 3 parts of foaming agent (azodicarbonamide) and 1 part of auxiliary foaming agent (urea).
The water treatment filler D comprises the following components in parts by weight: 25 parts of polypropylene PP, 20 parts of high-density polyethylene HDPE, 15 parts of calcium carbonate with 800 meshes, 727010 parts of POE Dow, 15 parts of calcite powder with 500 meshes and KH 5503 parts of silane coupling agent.
The water treatment filler A is extruded and granulated by a parallel co-rotating twin-screw extruder, and the process conditions are as follows: the raw materials are fully and uniformly mixed by a high mixer and a low mixer, the rotating speed of the high mixer is 900rpm, the running time is 15min, the rotating speed of the low mixer is 500rpm, the running time is 15min, and the L/D of a screw rod required by a double-screw machine is 52; the granulation mode is die surface water ring cutting;
the water treatment filler B is extruded and granulated by a parallel co-rotating twin-screw extruder, and the process conditions are as follows: the raw materials are fully and uniformly mixed by a high mixer and a low mixer, the rotation speed of the high mixer is 950rpm, the running time is 15min, the rotation speed of the low mixer is 550rpm, the running time is 15min, the L/D of a screw is required to be 56 by a double-screw machine, and the processing temperature is 145 ℃; the granulation mode is die surface water ring cutting;
the water treatment filler C is granulated by adopting a reaction kettle, and the process conditions are as follows: the temperature is 150 ℃, the pressure is 1.5MPa, and the reaction time is 2 min; the granulation mode is that underwater brace granulation is carried out after the extrusion of a melt pump;
the water treatment filler D is extruded and granulated by a parallel co-rotating twin-screw extruder, and the process conditions are as follows: the raw materials are fully and uniformly mixed by a high mixer and a low mixer, the rotating speed of the high mixer is 900rpm, the running time is 15min, the rotating speed of the low mixer is 650rpm, the running time is 15min, the L/D of a screw is 52 required by a double-screw machine, and the processing temperature is 170 ℃; the mode is that the die surface is cut circularly by water, the filler D after granulation is put into HCl solution with the concentration of 3ppm, and the filler D is soaked and washed for 20min and then naturally dried.
Filling a water treatment filler A, a water treatment filler B, a water treatment filler C and a water treatment filler D into a water treatment filler device, wherein the water treatment filler device is of an annular columnar structure and comprises an outer ring filler unit and an inner ring filler unit as shown in figure 1; the outer ring packing unit is sequentially filled with a water treatment packing A, a water treatment packing B and a water treatment packing C from the water flow direction; the inner ring packing unit is filled with water treatment packing D; the water flow flowing out from the outer ring packing unit enters the inner ring packing unit; in the embodiment, the volume ratio of the outer ring packing unit to the inner ring packing unit is 1:1.2, the volume ratio of the water treatment packing A, the water treatment packing B and the water treatment packing C in the outer ring packing unit is 30% to 45% to 15%, and the volume ratio of the water treatment packing D in the inner ring packing unit is 65%.
The water treatment filler device is used for treating municipal sewage 2 in a certain city, and the treatment effect is shown in the following table 2.
Table 2: treatment effect of water treatment filler device on municipal sewage 2
As can be seen from table 2: municipal sewage 2, NH is treated by utilizing the water treatment filler device4 +The removal efficiency of-N reaches 91.5 +/-3.3 percent, and NO3 -The N removal efficiency reaches 92.6 +/-2.8%, the TP removal rate is 85.1 +/-0.8%, and the SS removal rate is 91.2 +/-0.6%, so that the method has the effect of efficiently removing nitrogen, phosphorus and SS, and can realize synchronous removal of the SS and the nitrogen and the phosphorus in the wastewater.
Example 3:
the embodiment provides a composite functional water treatment filler composition and a filler device capable of realizing wastewater carbon source capture and synchronous removal of SS (suspended solid) and nitrogen and phosphorus, and the filler composition and the filler device are specifically as follows:
the water treatment filler A comprises the following raw materials in parts by weight: 75 parts of polypropylene PP, 10 parts of 2500-mesh calcium carbonate powder, 10 parts of basalt fiber, 2 parts of coupling agent (silane coupling agent KH550) and 72703 parts of toughening agent POE Dow.
The water treatment filler B comprises the following components in parts by weight: 50 parts of Poly Butylene Succinate (PBS), 2 parts of poly beta hydroxybutyrate valerate (PHBV), 45 parts of 400-mesh straw powder, 2 parts of coupling agent (silane coupling agent KH550) and 1 part of plasticizer epoxidized soybean oil.
The water treatment filler C comprises the following components in parts by weight: 40 parts of polypropylene PP, 1 part of poly beta-hydroxybutyrate valerate (PHBV), 33 parts of 400-mesh straw powder, 3 parts of coupling agent (silane coupling agent KH550), 2 parts of foaming agent (azodicarbonamide) and 1 part of auxiliary foaming agent (urea).
The water treatment filler D comprises the following components in parts by weight: 30 parts of polypropylene PP, 30 parts of high-density polyethylene HDPE, 15 parts of calcium carbonate with 800 meshes, 727010 parts of POE Dow, 15 parts of calcite powder with 500 meshes and KH 5502 parts of silane coupling agent.
The water treatment filler A is extruded and granulated by a parallel co-rotating twin-screw extruder, and the process conditions are as follows: the raw materials are fully and uniformly mixed by a high mixer and a low mixer, the rotating speed of the high mixer is 1000rpm, the running time is 12min, the rotating speed of the low mixer is 600rpm, the running time is 8min, and the L/D of a screw rod required by a double-screw machine is 52; the granulation mode is die surface water ring cutting;
the water treatment filler B is extruded and granulated by a parallel co-rotating twin-screw extruder, and the process conditions are as follows: the raw materials are fully and uniformly mixed by a high mixer and a low mixer, the rotating speed of the high mixer is 900rpm, the running time is 15min, the rotating speed of the low mixer is 600rpm, the running time is 10min, the L/D of a screw is 56 required by a double-screw machine, and the processing temperature is 145 ℃; the granulation mode is die surface water ring cutting;
the water treatment filler C is granulated by adopting a reaction kettle, and the process conditions are as follows: the temperature is 150 ℃, the pressure is 1.5MPa, and the reaction time is 2 min; the granulation mode is that underwater brace granulation is carried out after the extrusion of a melt pump;
the water treatment filler D is extruded and granulated by a parallel co-rotating twin-screw extruder, and the process conditions are as follows: the raw materials are fully and uniformly mixed by a high mixer and a low mixer, the rotating speed of the high mixer is 900rpm, the running time is 20min, the rotating speed of the low mixer is 650rpm, the running time is 15min, the L/D of a screw is 52 required by a double-screw machine, and the processing temperature is 185 ℃; the mode is that the die surface is cut circularly by water, the filler D after granulation is put into HCl solution with the concentration of 3ppm, and the filler D is soaked and washed for 20min and then naturally dried.
Filling a water treatment filler A, a water treatment filler B, a water treatment filler C and a water treatment filler D into a water treatment filler device, wherein the water treatment filler device is of an annular columnar structure and comprises an outer ring filler unit and an inner ring filler unit as shown in figure 1; the outer ring packing unit is sequentially filled with a water treatment packing A, a water treatment packing B and a water treatment packing C from the water flow direction; the inner ring packing unit is filled with water treatment packing D; the water flow flowing out from the outer ring packing unit enters the inner ring packing unit; in the embodiment, the volume ratio of the outer ring packing unit to the inner ring packing unit is 1:1.2, the volume ratio of the water treatment packing A, the water treatment packing B and the water treatment packing C in the outer ring packing unit is 30% to 40% to 15%, and the volume ratio of the water treatment packing D in the inner ring packing unit is 60%.
The water treatment filler device is used for treating wastewater in a river channel, and the treatment effect is shown in the following table 3.
Table 3: treatment effect of water treatment filler device on river wastewater
| Item | Numerical value (%) |
| Feed water NH4 +-N(mg/L) | 1.2±0.1 |
| NO of inlet water3 --N(mg/L) | 0.6±0.2 |
| TP Water intake (mg/L) | 0.1±0.1 |
| Influent SS (mg/L) | 15±2 |
| NH4 +-N removal (%) | 91.7±2.3 |
| NO3 --N removal (%) | 93.6±5.8 |
| TP removal Rate (%) | 79.1±4.5 |
| SS removal Rate (%) | 94.2±0.9 |
As can be seen from table 3: river wastewater, NH, is treated by utilizing the water treatment filler device4 +The removal efficiency of-N reaches 91.7 +/-2.3 percent, and NO3 -The N removal efficiency reaches 93.6 +/-5.8%, the TP removal rate is 79.1 +/-4.5%, and the SS removal rate is 94.2 +/-0.9%, so that the method has the effect of efficiently removing nitrogen, phosphorus and SS, and can realize synchronous removal of the SS and the nitrogen and the phosphorus in the wastewater.
The foregoing is a description of the present invention in connection with specific preferred embodiments and is not intended to limit the invention to the precise construction and operation shown and described. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (10)
1. A water treatment filler composition characterized by: the water treatment filler composition comprises a water treatment filler A, a water treatment filler B, a water treatment filler C and a water treatment filler D;
the water treatment filler A consists of polypropylene, calcium carbonate powder, basalt fiber, a coupling agent and a toughening agent;
the water treatment filler B consists of poly (butylene succinate), poly (beta-hydroxybutyrate valerate), straw powder, a coupling agent and a plasticizer;
the water treatment filler C consists of polypropylene, poly beta-hydroxybutyrate valerate, straw powder, a coupling agent, a foaming agent and a blowing aid;
the water treatment filler D is composed of polypropylene, high-density polyethylene, calcium carbonate, a toughening agent, calcite powder and a coupling agent.
2. The water treatment filler composition of claim 1, wherein: the mesh number of the calcium carbonate powder is 1250-2500 meshes; the mesh number of the straw powder is 150-500 meshes; the mesh number of the calcium carbonate is 400-1200 meshes; the mesh number of the calcite powder is 400-1200 meshes;
preferably, the coupling agent comprises a silane coupling agent KH550 and/or an aluminum titanate coupling agent;
preferably, the toughening agent comprises POE dow 7270;
preferably, the plasticizer comprises one or more of epoxidized soybean oil, erucamide, and citrate;
preferably, the blowing agent comprises azodicarbonamide;
preferably, the co-blowing agent comprises urea.
3. The water-treating filler composition of claim 1 or 2, wherein the water-treating filler a comprises, in parts by weight:
55-75 parts of polypropylene, 10-18 parts of calcium carbonate powder, 10-20 parts of basalt fiber, 2-3 parts of coupling agent and 1-3 parts of toughening agent.
4. The water-treating filler composition of claim 1 or 2, wherein the water-treating filler B comprises, in parts by weight:
30-50 parts of polybutylene succinate, 1-5 parts of poly beta-hydroxybutyrate valerate, 30-50 parts of straw powder, 2-3 parts of coupling agent and 0.5-1 part of plasticizer.
5. The water-treating filler composition of claim 1 or 2, wherein the water-treating filler C comprises, in parts by weight:
30-50 parts of polypropylene, 1-5 parts of poly beta-hydroxybutyrate valerate, 30-50 parts of straw powder, 2-3 parts of coupling agent, 2-4.5 parts of foaming agent and 0.5-1 part of urea.
6. The water-treating filler composition of claim 1 or 2, wherein the water-treating filler D comprises, in parts by weight:
20-30 parts of polypropylene, 20-30 parts of high-density polyethylene, 10-15 parts of calcium carbonate, 10 parts of a toughening agent, 15 parts of calcite powder and 2-3 parts of a coupling agent.
7. The water treatment filler composition of claim 1 or 2, characterized in that:
the water treatment filler A is extruded and granulated by a parallel co-rotating twin-screw extruder, and the process conditions are as follows: the raw materials are fully and uniformly mixed by a high mixer and a low mixer, the rotating speed of the high mixer is 800-1200 rpm, the running time is 10-25 min, the rotating speed of the low mixer is 450-650 rpm, the running time is 5-20 min, and the L/D of a screw is required to be more than 48 by a double-screw machine; the granulation mode is die surface water ring cutting;
preferably, the water treatment filler B is extruded and granulated by a parallel co-rotating twin-screw machine under the following process conditions: the raw materials are fully and uniformly mixed by a high mixer and a low mixer, the rotating speed of the high mixer is 800-1200 rpm, the running time is 10-25 min, the rotating speed of the low mixer is 450-650 rpm, the running time is 5-20 min, the L/D of a screw is required to be greater than 52 by a double screw machine, and the processing temperature is less than 155 ℃; the granulation mode is die surface water ring cutting;
preferably, the water treatment filler C is granulated by a reaction kettle, and the process conditions are as follows: the temperature is 120-190 ℃, the pressure is 1.0-2.5 MPa, and the reaction time is 1-3 min; the granulation mode is that underwater brace granulation is carried out after the extrusion of a melt pump;
preferably, the water treatment filler D is extruded and granulated by a parallel co-rotating twin-screw machine, and the process conditions are as follows: the raw materials are fully and uniformly mixed by a high mixer and a low mixer, the rotating speed of the high mixer is 800-1500 rpm, the running time is 10-30 min, the rotating speed of the low mixer is 450-650 rpm, the running time is 15min, the L/D of a screw is required to be more than 48 by a double screw machine, and the processing temperature is less than 195 ℃; the mode is that die surface water is circularly cut, the filler D after granulation is put into 3ppm HCl solution, and the filler D is naturally dried after being soaked and washed for 10-25 min.
8. The water treatment filling device is characterized by being of an annular columnar structure and comprising an outer ring filling unit and an inner ring filling unit; the water treatment filler composition as defined in any one of claims 1 to 7, which is filled with:
the outer ring packing unit is sequentially filled with a water treatment packing A, a water treatment packing B and a water treatment packing C from the water flow direction; the inner ring packing unit is filled with water treatment packing D;
the water flow flowing out from the outer ring packing unit enters the inner ring packing unit.
9. The water treatment packing device of claim 8, wherein: the volume ratio of the outer ring packing unit to the inner ring packing unit is 1: 1-1.5; the volume ratio of the water treatment filler A, the water treatment filler B and the water treatment filler C in the outer ring filler unit is 30-40 percent, 40-50 percent and 10-30 percent; the volume ratio of the water treatment filler D in the inner ring filler unit is 60-75%.
10. Use of a water treatment packing composition according to any one of claims 1 to 7 or a water treatment packing device according to claim 8 or 9 in sewage treatment.
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