CN101445303B - Method for recycling sewage for cleaning waste plastic and device thereof - Google Patents
Method for recycling sewage for cleaning waste plastic and device thereof Download PDFInfo
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- CN101445303B CN101445303B CN2008101802625A CN200810180262A CN101445303B CN 101445303 B CN101445303 B CN 101445303B CN 2008101802625 A CN2008101802625 A CN 2008101802625A CN 200810180262 A CN200810180262 A CN 200810180262A CN 101445303 B CN101445303 B CN 101445303B
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- sewage
- water
- aeration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/04—Disintegrating plastics, e.g. by milling
- B29B17/0412—Disintegrating plastics, e.g. by milling to large particles, e.g. beads, granules, flakes, slices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/02—Separating plastics from other materials
- B29B2017/0213—Specific separating techniques
- B29B2017/0286—Cleaning means used for separation
- B29B2017/0289—Washing the materials in liquids
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention relates to a method for recycling sewage cleaning waste plastic and a device thereof. The method comprises the steps that the waste plastic is sorted, crushed, cleaned and dried and can be sold; and washing sewage is filtered, electrolyzed, aerated, flocculated and deposited and can be recycled after filtering. The device is characterized in that a conveyer belt is arranged between a crushing mill and a cleaning machine; a sewage outlet pipe of the cleaning machine is communicated with a water collecting and filtering tank, an electrolyzing tank, an aerating tank, a dosing tank, a sedimentation tank, a filter tank and a reservoir sequentially; the bottoms of the aerating tank and the dosing tank are provided with an aerating head which is communicated with a turbine aeration machine; the bottoms of the dosing tank and the sedimentation tank are communicated with a sludge pool by a sludge pipe and a reflux pump; and the reservoir is communicated with the cleaning machine by a pipeline and a back water pump. The method and the device not only can recycle the waste plastic and reduce the pollution to the environment caused by white garbage, but the sewage can also be recycled and utilized after treatment and is discharged in compliance with standard finally. The dirt produced during the sewage treatment process can be reused after condensing.
Description
Technical field
The present invention relates to a kind of effluent cycle of cleaning waste or used plastics and utilize method and device.
Background technology
Along with the quickening of process of industrialization, the increase of the quantity of population, people are also increasing to the consumption of Freshwater resources.Yet the too much consumption fresh water and the discharging of water wasting further worsen the more and more in short supply and global environment of limited Freshwater resources, utilize in order to impel people's water saving and sewage purification to be handled again.Therefore need to propose economical and practical effluent cycle and utilize technology.It is that sanitary sewage or industrial sewage are carried out a series of deep purifyings processing that effluent cycle is utilized technology, make it to produce biological activity and reach certain water quality requirement, water outlet after the processing can reach the standard that is utilized again, and final energy qualified discharge, can save a large amount of tap water like this, free from environmental pollution.The present method and apparatus handled of the effluent cycle used of prior art, mostly apparatus expensive, complex process, investment are big, are not suitable for excellent popularization.Simple sewage disposal technology of technology and equipment are also arranged, but can not well finish advanced treatment, mostly do not reach requirement.For cleaning the waste or used plastics industry survey, unprocessed the getting under the situation of the sewage after major part all will be cleaned directly discharged, and causes very big harm to environment at present.Even if clean the sewage process simple process behind the waste or used plastics individually, do not reach discharging standards yet, more can not recycle.
Summary of the invention
The objective of the invention is in order to address the above problem, a kind of method and device that the waste or used plastics effluent cycle is utilized that clean proposed, this method and apparatus structure improve rationally, waste or used plastics is utilized again, and the sewage treating efficiency height is effective, sewage can circular treatment use repeatedly back qualified discharge, and cost is low, has good water-saving and environmental protection effect.
Purpose of the present invention provides a kind of effluent cycle of cleaning waste or used plastics and utilizes method.
Another object of the present invention provides a kind of effluent cycle of cleaning waste or used plastics and utilizes the device that uses in the method.
The objective of the invention is to be achieved through the following technical solutions:
A kind of effluent cycle of cleaning waste or used plastics is utilized method, and this method may further comprise the steps:
1) waste or used plastics is carried out sorting and remove foreign material such as wherein metal, sandstone, fabric, sort out then, be crushed to 2-3 orders;
2) insert the suitable caustic soda of adding in the cleaning machine, stirred 8-12 minutes, injecting water cleaning 20
-25 minutes, add alkaline cleaner at last and cleaned 3-5 minutes;
3) can become plastic raw materials after the plastics oven dry after taking-up is cleaned, the granulation sells; Sewage after the washing enters the filter vat that catchments by the water shoot that is equipped with valve and carries out electrolysis through filter screen inflow electrolyzer, sewage enters the aeration tank after by electrolysis again to carry out aeration and handles, through the water behind the aeration after pipeline enters the dosing pond, add polymerize aluminum chloride and carboxyl starch calcium and open dosing pond aeration tube valve simultaneously, waterfall gas 10-20 minutes, close the aeration valve, carry out flocculation reaction, flowing into settling tank after the flocculation again precipitates, the water of post precipitation enters filtering basin and filters, and recycles after flowing into water reservoir at last; The dirt that produces in described dosing pond and the settling tank is extracted in the sludge sump by sludge pipe and reflux pump, can utilize after concentrating again.
Add suitable water when in the step 1) of the present invention waste or used plastics being pulverized and help pulverizing, the weight ratio of its water and waste or used plastics is 1:(2.5-4).
The plastics after the pulverizing of the present invention and the part by weight of caustic soda are 200:1; Plastics after the pulverizing and water weight ratio are 1:8; Alkaline cleaner is the conventional alkaline cleaner of selling on the market, itself and pulverize after the weight ratio of plastics be 1:1600;
The present invention cleans the effluent cycle of waste or used plastics and utilizes method steps 2) in, it not only has waste or used plastics is had cleanup action, and can stir anerobic sowage, can remove the middle phosphorus that anhydrates and reach 75%, is beneficial to the control thread fungus and expands.
Be provided with the multi-disc electrolytic zinc-coated steel sheet in the electrolyzer of the present invention the pond is divided into multistage, every electrolytic zinc-coated steel sheet all is connected with power supply, its voltage of supply is controlled in the 36v, current control is in 20A, end between this electrolytic zinc-coated steel sheet permeable hole that is crisscross arranged, water in the pond streams by permeable hole is S-shaped, and sewage was controlled at 5-8 minutes by the time of electrolyzer.Electrolytic zinc-coated steel sheet in the described electrolyzer can fully carry out electrolysis to sewage under the energising situation, remove oil stain, sulfate radical, chlorine root in the sewage, reach strong oxidation, strong reduction, flocculation, sterilization, decolouring also can remove most of organism with deodorization;
The aeration that produces in the aeration tank among the present invention be by aerator by pipeline and aeration head to the water aeration in the pond, make sewage become active biochemical, and evenly stir, to COD, BOD
5, SS removal effect good;
A kind of effluent cycle of cleaning waste or used plastics of the present invention is utilized the carboxyl starch calcium of mentioning in the method, is prepared from by the following method by following raw material;
Polyacrylamide, starch, lime carbonate, its part by weight are 1:1:1;
Take by weighing each raw material by prescription, with polyacrylamide and lime carbonate respectively water to be dissolved as the congee shape standby; Starch is added ammonia solvent becomes the congee shape standby; Starch after the dissolving and lime carbonate are dried in the air after being heated to 85-90 ℃ to merging to 45 ℃ and polyacrylamide amine solution;
The part by weight of sewage in the described dosing pond and polymerize aluminum chloride and carboxyl starch calcium is 5000:1:1-5000:2:2.
Dosing of the present invention pond and settling tank bottom is extracted in the sludge sump through pipeline and reflux pump by the dirt that sewage produces, and does compost treatment after concentrated or as the main raw material of pavement brick;
Gac is arranged at the bottom in the filtering basin of the present invention, is used for impurity in the filtered water.
Effluent cycle of the present invention utilize in the method effluent cycle handle reach certain number of times after with each pond in the water discharging clean after, clear up the dirt in each pond, can annotate again and recycle after clear water cleans waste or used plastics.
A kind of effluent cycle of cleaning waste or used plastics of the present invention is utilized method, and it can be to the technics of reclaim of plastic waste utilization, reduce the pollution of white garbage to environment, clean behind the waste or used plastics sewage since pH 11-13, COD 1000-1500mg/L, BOD
5800-1000mg/L, SS 600-800mg/L, total nitrogen 40-50mg/L, total phosphorus 15-20mg/L, other pollutent indexs of LAS 5-8mg/L also are higher than national specified discharge standard far away, then bring very big pollution and serious harm to environment as direct discharging, and sewage can be recycled after effluent cycle of the present invention utilizes method to handle, can save a large amount of tap water like this, final qualified discharge is free from environmental pollution.The dirt that produces in sewage treatment process can be as the main raw material of farm manure or production pavement brick after concentrating; And this technological investment is little, and implementation result is good, but killing three birds with one stone is fit to extensively promote the use of.
The present invention also provides a kind of effluent cycle of cleaning waste or used plastics to utilize device in the method, it is characterized in that: be provided with travelling belt between pulverizer and the cleaning machine, the sewage rising pipe of cleaning machine is communicated with the filter vat that catchments, electrolyzer, aeration tank, dosing pond, settling tank, filtering basin, water reservoir successively, is provided with filtering net in the described filter vat that catchments; Be provided with the multi-disc electrolytic zinc-coated steel sheet in the described electrolyzer, every electrolytic zinc-coated steel sheet all is connected with through the power supply after the transformation, the permeable hole that is crisscross arranged of the end between this electrolytic zinc-coated steel sheet, and pool inner water streams by permeable orifice flow is S-shaped; Aeration tank and bottom, dosing pond are provided with the aeration head that is communicated with the turbine aerator by aerated conduit; Described dosing pond and settling tank bottom are communicated with sludge sump by sludge pipe and reflux pump; Water reservoir is communicated with cleaning machine by pipeline and back water pump.
The sewage rising pipe of described cleaning machine is provided with the water control valve door; The aerated conduit that connects dosing pond aeration head is provided with the control valve door.
Multi-disc electrolytic zinc-coated steel sheet described in this device is divided into multistage with electrolyzer;
It is perfect that this device has structure, easy to operate, and cost is compared extremely low with present existing sewage disposal device, and floor space gets final product for little about 60 square metres, and the sewage purification treatment effect is good, efficient height, the advantage of the water-saving and environmental protection effect that tool is good.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Symbol of numeral is represented the following meaning among the figure
1, pulverizer, 2, travelling belt, 3, cleaning machine, 3.1, the water control valve door, 3.2, the sewage drainage pipe, 4, the filter vat that catchments, 4.1, filtering net, 5, electrolyzer, 5.1, electrolytic zinc-coated steel sheet, 6, the aeration tank, 6.1 airing head, 6.2 control valve doors, 7, the dosing pond, 8, settling tank, 9, filtering basin, 10, water reservoir, 11, pipeline, 12, back water pump, 13, sludge sump.
Embodiment
The accompanying drawings embodiment of the present invention, it is to be used for understanding the present invention, rather than restriction the present invention
A kind of effluent cycle use device of cleaning waste or used plastics as shown in Figure 1,
Be provided with travelling belt 2 between pulverizer 1 and the cleaning machine 3, the sewage rising pipe 3.2 of washing machine 3 is communicated with the filter vat 4 that catchments, electrolyzer 5, aeration tank 6, dosing pond 7, settling tank 8, filtering basin 9, water reservoir 10 successively, described sewage rising pipe is provided with water control valve door 3.1, is provided with filtering net 4.1 in the described filter vat that catchments; Be provided with 15 electrolytic zinc-coated steel sheets 5.1 in the described electrolyzer, electrolyzer is divided into 16 sections, every electrolytic zinc-coated steel sheet all is connected with through the power supply after the transformation, the permeable hole that is crisscross arranged of the end between this electrolytic zinc-coated steel sheet, and pool inner water stream streams by permeable hole is S-shaped; Bottom, aeration tank and bottom, dosing pond are provided with the aeration head 6.1 that is communicated with the turbine aerator by aerated conduit; The aerated conduit of described connection dosing pond aeration head is provided with control valve door 6.2; Described dosing pond and settling tank bottom are communicated with sludge sump 13 by sludge pipe and reflux pump; Water reservoir is communicated with cleaning machine by pipeline 11 and back water pump 12.
Below describe a kind of effluent cycle of cleaning waste or used plastics and utilize method, this method may further comprise the steps:
Condition: to clean the waste or used plastics after 4000kg pulverizes, average mark cleans for 10 times;
1) waste or used plastics is carried out sorting and remove foreign material such as wherein metal, sandstone, fabric, sort out then, it is standby to be broken to 2 orders with pigment, and the weight ratio of water and waste or used plastics is 1:3;
2) plastics 400kg after the pulverizing of step 1 is inserted adding 2kg caustic soda in the cleaning machine, stirred 10 minutes,, add the 0.25kg alkaline cleaner at last and cleaned again 3 minutes injecting 3200kg water cleaning 20 minutes;
3) can become plastic raw materials after the plastics oven dry after taking-up is cleaned, the granulation sells; Sewage after the washing enters water leg by water shoot and flows to electrolysis in the electrolyzer through filter screen, be provided with the electrolytic zinc-coated steel sheet that multi-disc is connected with power supply in the described electrolyzer, its power source voltage is controlled at 36V, current control is at 20A, sewage was controlled at 8 minutes by the time of electrolyzer, sewage carries out the aeration processing through entering the aeration tank after the electrolysis again, after entering the dosing pond, pipeline adds polymerize aluminum chloride and carboxyl starch calcium through the sewage behind the aeration, the part by weight of sewage and polymerize aluminum chloride and carboxyl starch calcium is 5000:1:2, open dosing pond aeration tube valve simultaneously, waterfall gas 15 minutes, carry out flocculation reaction again, reacted current advance settling tank and precipitate, and the water of post precipitation enters the filtering basin that the bottom is provided with gac and filters, and recycle after flowing into water reservoir at last; Described dosing pond and settling tank bottom are extracted in the sludge sump through pipeline and reflux pump by the dirt that sewage produces, and through concentrating, pile up as farm manure at last.
It below is detected result (mg/L) when reaching 100 times water discharging after the recycle of the present invention
| Sequence number | The pollutent title | First discharge standard (category-B) | Sewage effluent detected result of the |
| 1 | pH | 6.0-9.0 | 8.6 |
| 2 | SS (suspended substance) | ≤20 | 18.3 |
| 3 | COD (chemical oxygen demand (COD)) | ≤60 | 52 |
| 4 | BOD 5(biochemical oxygen demand (BOD)) | ≤20 | 19.5 |
| 5 | Ammonia nitrogen (in N) | ≤8(15) | 7.6(14) |
| 6 | Total phosphorus (in P) | ≤1mg | 0.96 |
| 7 | LAS (anion surfactant) | ≤1mg | 0.82 |
| 8 | Total nitrogen (in N) | ≤20 | 18.2 |
| 9 | Vegetable and animals oils | ≤3 | 2.93 |
| 10 | Petroleum-type | ≤3 | 2.91 |
| 11 | Colourity (extension rate) | 30 | 30 |
| 12 | Excrement colibacillus group number (individual)/ |
10 4 | 8500—9000/L |
Annotate: the outer numerical value of bracket is water temperature〉examination criteria 12 ℃ times, the examination criteria the when numerical value in the bracket is water temperature≤12 ℃.
Claims (8)
1. an effluent cycle of cleaning waste or used plastics is utilized method, and this method may further comprise the steps:
1) waste or used plastics is carried out sorting removal metal, sandstone, fabric wherein, sort out then, be crushed to the 2-3 order;
2) plastics after will pulverizing are inserted and are added suitable caustic soda in the cleaning machine, stir 8-12 minute, and the water that reinjects cleaned 20-25 minute, add alkaline cleaner cleaning 3-5 minute at last;
3) can become plastic raw materials after the plastics oven dry after taking-up is cleaned, the granulation sells; Sewage after the washing enters the filter vat that catchments by the water shoot that is equipped with valve and carries out electrolysis through filter screen inflow electrolyzer, sewage enters the aeration tank after by electrolysis again to carry out aeration and handles, after entering the dosing pond, pipeline adds polymerize aluminum chloride and carboxyl starch calcium is opened dosing pond aeration tube valve simultaneously through the water behind the aeration, aeration 10-20 minute, close the aeration valve, carry out flocculation reaction, flowing into settling tank after the flocculation again precipitates, the water of post precipitation enters filtering basin and filters, and recycles after flowing into water reservoir at last; The dirt that produces in described dosing pond and the settling tank is extracted in the sludge sump by sludge pipe and reflux pump, can utilize after concentrating again;
The plastics after the described pulverizing and the part by weight of caustic soda are 200: 1; The plastics after the pulverizing and the weight ratio of water are 1: 8; Alkaline cleaner is the conventional alkaline cleaner of selling on the market, itself and pulverize after the weight ratio of plastics be 1: 1600;
Described carboxyl starch calcium is prepared from by the following method by following raw material;
Polyacrylamide, starch, lime carbonate, its part by weight are 1: 1: 1;
Take by weighing each raw material by prescription, with polyacrylamide and lime carbonate respectively water to be dissolved as the congee shape standby; Starch is added ammonia solvent becomes the congee shape standby; Starch after the dissolving and lime carbonate are dried in the air after being heated to 85-90 ℃ to merging to 45 ℃ and polyacrylamide amine solution.
2. a kind of effluent cycle of cleaning waste or used plastics according to claim 1 is utilized method, be provided with the multi-disc electrolytic zinc-coated steel sheet in the described electrolyzer electrolyzer is divided into multistage, every electrolytic zinc-coated steel sheet all is connected with power supply, its voltage of supply is controlled in the 36V, current control is in 20A, water in end between this electrolytic zinc-coated steel sheet permeable hole that is crisscross arranged, electrolyzer streams by permeable hole is S-shaped, and sewage was controlled at 5-8 minute by the time of electrolyzer.
3. a kind of effluent cycle of cleaning waste or used plastics according to claim 2 is utilized method, the aeration that produces in the described aeration tank be by aerator by pipeline and aeration head to the water aeration in the pond.
4. a kind of effluent cycle of cleaning waste or used plastics according to claim 3 is utilized method, and the part by weight of sewage in the described dosing pond and polymerize aluminum chloride and carboxyl starch calcium is 5000: 1: 1-5000: 2: 2.
5. a kind of effluent cycle of cleaning waste or used plastics according to claim 4 is utilized method, described dosing pond and settling tank bottom are extracted in the sludge sump through pipeline and reflux pump by the dirt that sewage produces, and do the main raw material that the pavement brick is produced in compost treatment or conduct after concentrating.
6. utilize the device that uses in the method in a kind of effluent cycle of cleaning waste or used plastics of claim 1, it is characterized in that: be provided with travelling belt between pulverizer and the cleaning machine, the sewage rising pipe of cleaning machine is communicated with the filter vat that catchments, electrolyzer, aeration tank, dosing pond, settling tank, filtering basin, water reservoir successively, is provided with filtering net in the described filter vat that catchments; Be provided with the multi-disc electrolytic zinc-coated steel sheet in the described electrolyzer, every electrolytic zinc-coated steel sheet all is connected with through the power supply after the transformation, the permeable hole that is crisscross arranged of the end between this electrolytic zinc-coated steel sheet, and pool inner water streams by permeable orifice flow is S-shaped; Aeration tank and bottom, dosing pond are provided with the aeration head that is communicated with the turbine aerator by aerated conduit; Described dosing pond and settling tank bottom are communicated with sludge sump by sludge pipe and reflux pump; Water reservoir is communicated with cleaning machine by pipeline and back water pump.
7. a kind of effluent cycle of cleaning waste or used plastics according to claim 6 is utilized the device that uses in the method, and the sewage rising pipe of wherein said cleaning machine is provided with the water control valve door; The aerated conduit that connects dosing pond aeration head is provided with the control valve door.
8. a kind of effluent cycle of cleaning waste or used plastics according to claim 7 is utilized the device that uses in the method, and wherein said multi-disc electrolytic zinc-coated steel sheet is divided into multistage with electrolyzer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101802625A CN101445303B (en) | 2008-12-03 | 2008-12-03 | Method for recycling sewage for cleaning waste plastic and device thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101802625A CN101445303B (en) | 2008-12-03 | 2008-12-03 | Method for recycling sewage for cleaning waste plastic and device thereof |
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| CN101445303A CN101445303A (en) | 2009-06-03 |
| CN101445303B true CN101445303B (en) | 2010-09-29 |
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| CN2008101802625A Expired - Fee Related CN101445303B (en) | 2008-12-03 | 2008-12-03 | Method for recycling sewage for cleaning waste plastic and device thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101817610A (en) * | 2010-04-06 | 2010-09-01 | 湖北众联塑业有限公司 | Method for filtering and circulating sewage after washing plastic wastes |
| CN101863566B (en) * | 2010-05-07 | 2011-08-17 | 雷震 | Process for treating production sewage and recycling sediment thereof |
| RU2483813C1 (en) * | 2011-11-23 | 2013-06-10 | Открытое акционерное общество "Водоканал-инжиниринг" | Method and device for disinfection and flushing of pipelines after repair-and-renewal operations |
| CN103465394A (en) * | 2013-09-30 | 2013-12-25 | 上海申嘉三和环保科技开发有限公司 | Method for separating and treating waste plastic generated by storage batteries |
| CN103770243B (en) * | 2013-10-29 | 2015-10-28 | 界首市成铭塑业有限公司 | A kind of waste plastics cleaning technique |
| CN105251732B (en) * | 2015-11-09 | 2018-05-11 | 奉化市旭日鸿宇有限公司 | A kind of cleaning method of plastic particles raw materials |
| CN105755588A (en) * | 2016-03-31 | 2016-07-13 | 浙江绿宇环保有限公司 | Circulation system for water recycled from polyester-containing waste textiles |
| CN105837853A (en) * | 2016-03-31 | 2016-08-10 | 浙江绿宇环保有限公司 | Cleaning and pretreatment process for waste textiles containing polyester fibers |
| CN108069553A (en) * | 2016-11-10 | 2018-05-25 | 苏州凯世工贸有限公司 | A kind of heavy oil dirt cleaning machine environmental protection water treatment system and its processing method |
| CN106827293B (en) * | 2016-12-25 | 2018-11-13 | 重庆鼎盛印务股份有限公司 | Polybag disintegrating washing machine |
| CN107673493A (en) * | 2017-11-03 | 2018-02-09 | 蚌埠市兄弟粮油食品科技有限公司 | A kind of multi-ladder hierarchical ground water purification treatment system |
| CN110723850A (en) * | 2019-12-02 | 2020-01-24 | 王夏雨 | Industrial sewage treatment equipment |
| CN111547937B (en) * | 2020-04-30 | 2021-05-07 | 南京大学 | Water-salt balancing method and system for recycling household garbage waste plastic cleaning water |
| CN112454741A (en) * | 2020-11-05 | 2021-03-09 | 汨罗市奥格塑业有限公司 | Waste plastic cleaning method |
| CN116395895A (en) * | 2023-04-21 | 2023-07-07 | 江苏源泰恒环境工程有限公司 | Multistage efficient biological aerated filter and sewage treatment process |
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| CN101445303A (en) | 2009-06-03 |
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