CN109205899A - A method of landfill leachate is handled using disc tube reverse osmosis (dt-ro) integrated technology - Google Patents
A method of landfill leachate is handled using disc tube reverse osmosis (dt-ro) integrated technology Download PDFInfo
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- CN109205899A CN109205899A CN201810963256.0A CN201810963256A CN109205899A CN 109205899 A CN109205899 A CN 109205899A CN 201810963256 A CN201810963256 A CN 201810963256A CN 109205899 A CN109205899 A CN 109205899A
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- carnallite
- dtro
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- landfill leachate
- reverse osmosis
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
- C01D3/14—Purification
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D5/00—Sulfates or sulfites of sodium, potassium or alkali metals in general
- C01D5/16—Purification
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The invention belongs to water treatment field more particularly to a kind of methods using disc tube reverse osmosis (dt-ro) integrated technology processing landfill leachate.Include the following steps: that pretreatment, filtering water outlet is concentrated and is filtered, burned into two-stage DTRO or submersible burning, carnallite processing step.Compared to techniques such as membrane bioreactor (MBR)+nanofiltration (NF)/reverse osmosis (RO), pretreatment+DTRO, the present invention is under the premise of standard water discharge, it is more integrated with system, pretreatment is relatively simple, occupied area is smaller, the rate of recovery is higher, operating cost is lower, solves the reluctant problem of high-concentration waste liquid after reverse osmosis concentrated liquid evaporates, and recoverable carnallite, achieve the purpose that near-zero release and has recycled.
Description
Technical field
The invention belongs to water treatment fields more particularly to a kind of use disc tube reverse osmosis (dt-ro) integrated technology to handle garbage filter
The method of liquid.
Background technique
The water quality of landfill leachate is used by component of refuse, treatment scale, precipitation, weather, landfill process and landfill yard
The influence of the factors such as the time limit usually has a characteristic that change of water quality is big, organic matter (protein-based, polysaccharide, humic acid, list
Peaceful acid, vegetable and animals oils, petroleum etc.) concentration is high, part heavy metal ion (chromium, nickel, cadmium, lead, arsenic, mercury etc.) content is high, salt (chlorine
Change sodium, potassium chloride, sodium sulphate, potassium sulfate, calcium sulfate, magnesium sulfate etc.) high, the nutritive proportion imbalance of content etc., belong to a kind of ingredient
The difficult organic wastewater of high concentration complicated and changeable.Traditional nanofiltration (NF)+reverse osmosis (RO) UF membrane was only a physically separate
Journey, can not degradation of contaminant, be less able to achieve the innoxious and recycling of pollutant, be not suitable for the above-mentioned water quality requirement of processing.
DTRO(disc tube reverse osmosis (dt-ro)) technology is specific to the processing of landfill leachate and develops, and it is to realize waste water zero
Discharge, the key technology of waste water high standard reuse.Disc tube reverse osmosis (dt-ro) membrane module uses open runner design, adjacent guide disk
Between distance be 4 mm, disc surface have certain way arrange salient point.This special mechanics design makes liquid to be processed in pressure
It flows through to be formed when filter membrane surface meets salient point collision under effect and advance the speed and self-cleaning function, to significantly reduce concentration polarization
Change, avoid the fouling and organic contamination, blocking of film surface, the use that can effectively simplify pretreatment, successfully extend diaphragm
Service life.Patent No. CN201610676432.3, a kind of series connection for landfill leachate treatment of patent name and dish tubular type in parallel
The patent of invention and patent No. CN201610409678.4 of reverse osmosis equipment and its application method, a kind of dish of patent name
The patent of invention of tubular type reverse osmosis method for treating sewage and system is all using second level disc tube reverse osmosis (dt-ro) as core technology to rubbish
The typical case that rubbish percolate is handled.But the general character of above-mentioned documents and universal open question are, for not saturating
The concentrate for crossing second level DTRO system does not propose effective solution, this partial concentration this use of liquid-based is returned tank and filled out in practice
The mode buried is handled.And as country steps up environmental requirement, rear near-zero release is further processed to concentrate, is returned
The useful resources receive, recycled in solid waste more meet the needs of national environmental protection policy, and reduce environmental pollution, recycled
Use resource.
Summary of the invention
The present invention is not further processed concentrate of the landfill leachate after UF membrane, does not recycle for the prior art
The problems such as utility in concentrate, provides a kind of method using disc tube reverse osmosis (dt-ro) integrated technology processing landfill leachate,
Include the following steps:
(1) it pre-processing, the pH value for adjusting landfill leachate is 6.5~6.8, it is filtered into sand filter and core type filter,
Raw water enters sand filter 6~12m/h of flow rates, and filtering accuracy is 50~100 μm, sand filter 0.3~4m of diameter, and sand filter is anti-
Period 70-90 hour of flushing, the precision of core type filter are 5~20 μm；
(2) filtering water outlet enters two-stage DTRO and is concentrated and is filtered, and the concentrate of level-one DTRO is discharged into concentrate reservoir, second level
DTRO is further processed level-one DTRO permeate, and second level permeate removes the gases such as carbon dioxide in water removal through stripping, up to standard
Discharge or reuse, secondary concentration liquid then return to the water inlet end of level-one DTRO system, to improve the rate of recovery of system；
(3) concentrate is handled, and after two-stage DTRO concentration, the concentrate in concentrate reservoir is selected at one by following two mode
Reason:
A. concentrate evaporates further concentration by multi-effect evaporator, removes 70-80% moisture, obtains high-concentration waste liquid and part is miscellaneous
Salt, gained high-concentration waste liquid, which sprays into incinerator, carries out burning disposal, 900-1000 degrees Celsius of incineration temperature, burns time 3-20
Second, organic matter is removed, another part carnallite is obtained, the condensate liquid containing organic matter then returns in landfill leachate stoste, merges institute
It obtains carnallite to remain to handle, the multi-effect evaporator is the effect of triple effect-six.
B. submersible burning burns to concentrate, removes organic matter, obtains carnallite, condensate liquid returns to garbage filter
In liquid stoste.
(4) carnallite is handled, and the carnallite obtained to either type in step 3 two ways burns again, incineration temperature:
It 600-800 degrees Celsius, burns the time: 3-10 seconds；Remaining organic matter is removed, then dissolves carnallite under agitation with water, to
Hydroxide is added in solution with precipitation of heavy metals ion, the solution of the heavy-metal ion removal point salt device that decrystallizes carries out a point salt,
Obtain sodium sulphate and sodium chloride.
Further, a kind of side using disc tube reverse osmosis (dt-ro) integrated technology processing landfill leachate of the present invention
Method, hydroxide described in step (4) is one of sodium hydroxide or calcium hydroxide.
The beneficial effects of the present invention are: the present invention can effectively realize near-zero release and recycling utility, reaches and follow
The purpose that ring utilizes.In the present invention, further processing has been carried out to DTRO concentrate: has eliminated organic matter, obtained higher
The sodium sulphate and sodium chloride of purity avoid the pollution again to environment.
Detailed description of the invention
Fig. 1 is process flow of the landfill leachate using integrated two-stage DTRO- evaporation-burning；
Fig. 2 is the process flow using integrated two-stage DTRO- burning.
Specific embodiment
Referring to figs. 1 and 2, a kind of side using disc tube reverse osmosis (dt-ro) integrated technology processing landfill leachate of the present invention
Method, comprising:
(1) it pre-processing, the pH value for adjusting landfill leachate is 6.5~6.8, it is filtered into sand filter and core type filter,
Raw water enters sand filter 6~12m/h of flow rates, and filtering accuracy is 50~100 μm, sand filter 0.3~4m of diameter, and sand filter is anti-
Period 70-90 hour of flushing, the precision of core type filter are 5~20 μm；
(2) filtering water outlet enters two-stage DTRO and is concentrated and is filtered, and the concentrate of level-one DTRO is discharged into concentrate reservoir, second level
DTRO is further processed level-one DTRO permeate, and second level permeate removes the gases such as carbon dioxide in water removal through stripping, up to standard
Discharge or reuse, secondary concentration liquid then return to the water inlet end of level-one DTRO system, to improve the rate of recovery of system；
(3) concentrate is handled, and after two-stage DTRO concentration, the concentrate in concentrate reservoir is selected at one by following two mode
Reason:
A. concentrate evaporates further concentration by multi-effect evaporator, removes 70-80% moisture, obtains high-concentration waste liquid and part is miscellaneous
Salt, gained high-concentration waste liquid, which sprays into incinerator, carries out burning disposal, 900-1000 degrees Celsius of incineration temperature, burns time 3-20
Second, organic matter is removed, another part carnallite is obtained, the condensate liquid containing organic matter then returns in landfill leachate stoste, merges institute
It obtains carnallite to remain to handle, the multi-effect evaporator is the effect of triple effect-six.
B. submersible burning burns to concentrate, removes organic matter, obtains carnallite, condensate liquid returns to garbage filter
In liquid stoste.
(4) carnallite is handled, and the carnallite obtained to either type in step 3 two ways burns again, incineration temperature:
It 600-800 degrees Celsius, burns the time: 3-10 seconds；Remaining organic matter is removed, then dissolves carnallite under agitation with water, to
Hydroxide is added in solution with precipitation of heavy metals ion, the solution of the heavy-metal ion removal point salt device that decrystallizes carries out a point salt,
Obtain sodium sulphate and sodium chloride.
Further, a kind of side using disc tube reverse osmosis (dt-ro) integrated technology processing landfill leachate of the present invention
Method, hydroxide described in step (4) is one of sodium hydroxide or calcium hydroxide.
In conjunction with specific embodiment, the present invention is described further:
Embodiment 1
Certain consumer waste landfill percolate, muddiness have a large amount of suspended matters, conductivity 20,000 μ S/cm, CODcr:
5680 mg/L.Penetrating fluid treating capacity is 150 m3/d.It is handled the following steps are included:
Acid adding adjusts landfill leachate stoste pH, and subsequently into quartz filter, sand filters precision is 50 μm.Sand filter
The period of backwash is 80 hours.5 ppm antisludging agents are added into sand filtration water outlet, filter (precision: 10 μm) subsequently into core type.
Filtering water outlet enters two-stage DTRO system, and the discharge of second level DTRO standard water discharge is discharged pH:6.8, CODcr: 16 mg/L, conductivity
It is not detected, the rate of recovery: 80%.Two-stage DTRO concentrate, which enters in triple effect forced-circulation evaporator, to be further concentrated, and removal is wherein
75% moisture, obtains high-concentration waste liquid and carnallite, and condensate liquid returns in landfill leachate original fluid container.High-concentration waste liquid enters burning
Burning disposal is carried out in furnace, is removed organic substance, is obtained another part carnallite.
After merging carnallite, burns and remove remaining organic matter.After burning, it is dissolved in water and the aqueous solution being closely saturated is made
(main component is sodium sulphate and sodium chloride, the impurity concentrations such as a small amount of calcium ions and magnesium ions: 25-30 wt.%), is added 0.01 thereto
The sodium hydroxide solution heavy-metal ion removal of M；Filtering, filtrate enter IV effect of four-effect countercurrent extraction crystallizing evaporator, pass through water conservancy diversion
Pump sequentially enter III, II, I effect, heating with steam then with feed liquid flow direction on the contrary, anhydrous sodium sulfate crystallization from I effect, II effect be precipitated,
Washing, dehydration, drying, while the IV secondary vapour of effect is by being used as product water reuse after surface condenser condensation.I effect evaporator concentration
Liquid is sent to cooler crystallizer, and sal glauberi crystallization is precipitated at 0 degree Celsius, is sent to IV effect feed end, is continued through quadruple effect knot
Brilliant device output anhydrous sodium sulfate.Concentrate after crystallisation by cooling send to salt evaporator and produces sodium chloride, dehydration, drying.
Certain the consumer waste landfill percolate water quality indicator of table 1
| Project | Unit | Detection data | Remarks |
| pH | —— | 7.81 | |
| Conductivity | us/cm | 2, 2100 | |
| Total hardness | mg/L | 360 | With calcium carbonate |
| Calcium hardness | mg/L | 200 | With calcium carbonate |
| Total alkalinity | mg/L | 10010 | With calcium carbonate |
| CODcr | mg/L | 5680 | |
| Vegetable and animals oils | mg/L | 5 | |
| Petroleum-type | mg/L | 2 | |
| Coloration | Degree | 3500 | |
| Suspended matter | mg/L | 4290 | |
| Chloride | mg/L | 3549 | |
| Ammonia nitrogen | mg/L | 2700 | |
| Sulfate | mg/L | It is not detected |
Embodiment 2
Certain percolate from garbage filling field, raw water quality index: pH:7.84, total hardness: 3000 mg/L, calcium hardness: 1400 mg/
L, basicity: 11600 mg/L, conductivity: 38000 us/cm.Coloration: 1800~2000.Penetrating fluid treating capacity is 300 m3/d。
It is handled the following steps are included:
Acid adding adjusts landfill leachate stoste pH, then filters through sand filtration+core, 100 μm of sand filtration filtering accuracy, core type filtering accuracy:
10μm.The period of sand filter backwash is 120 hours or so.10 ppm antisludging agents are added into sand filtration water outlet.Filtering be discharged into
Enter two-stage DTRO system, operating pressure: 65 bar, the discharge of second level DTRO standard water discharge, the rate of recovery: 70%.Two-stage DTRO is concentrated
Liquid sprays into combustion furnace, carries out burning processing by auxiliary fuel of natural gas, temperature: 900-1000 degrees Celsius, removing organic matter
Matter, obtains carnallite, and condensate liquid returns in landfill leachate original fluid container.
Carnallite is dissolved in water, the aqueous solution (concentration: 30 wt.%) being closely saturated is made, a lime removal huge sum of money is added thereto
Belong to ion；It filters, with steam then with feed liquid flow direction on the contrary, anhydrous sodium sulfate is crystallized from I effect, II effect precipitation, washing takes off for heating
Water, drying, while the IV secondary vapour of effect is by being used as product water reuse after surface condenser condensation.I effect evaporator concentrate send to
Sal glauberi crystallization is precipitated at 0 degree Celsius for cooler crystallizer, send to IV effect feed end, continues through the production of quadruple effect crystallizer
Anhydrous sodium sulfate out.Concentrate after crystallisation by cooling send to salt evaporator and produces sodium chloride, dehydration, drying.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (2)
1. a kind of method using disc tube reverse osmosis (dt-ro) integrated technology processing landfill leachate, it is characterised in that: including walking as follows
It is rapid:
Pretreatment, the pH value for adjusting landfill leachate is 6.5~6.8, is filtered into sand filter and core type filter, raw water
Into sand filter 6~12m/h of flow rates, filtering accuracy is 50~100 μm, sand filter 0.3~4m of diameter, sand filter backwash
Period 70-90 hour, the precision of core type filter is 5~20 μm；
(2) filtering water outlet enters two-stage DTRO and is concentrated and is filtered, and the concentrate of level-one DTRO is discharged into concentrate reservoir, second level
DTRO is further processed level-one DTRO permeate, and second level permeate removes the gases such as carbon dioxide in water removal through stripping, up to standard
Discharge or reuse, secondary concentration liquid then return to the water inlet end of level-one DTRO system, to improve the rate of recovery of system；
(3) concentrate is handled, and after two-stage DTRO concentration, the concentrate in concentrate reservoir is selected at one by following two mode
Reason:
A. concentrate evaporates further concentration by multi-effect evaporator, removes 70-80% moisture, obtains high-concentration waste liquid and part is miscellaneous
Salt, gained high-concentration waste liquid, which sprays into incinerator, carries out burning disposal, 900-1000 degrees Celsius of incineration temperature, burns time 3-20
Second, organic matter is removed, another part carnallite is obtained, the condensate liquid containing organic matter then returns in landfill leachate stoste, merges institute
Carnallite is obtained to remain to handle,
B. submersible burning burns to concentrate, removes organic matter, obtains carnallite, and condensate liquid returns to landfill leachate original
In liquid,
(4) carnallite is handled, and the carnallite obtained to either type in step 3 two ways burns again, incineration temperature: 600-
It 800 degrees Celsius, burns the time: 3-10 seconds；Remaining organic matter is removed, then carnallite is dissolved under agitation with water, to solution
For middle addition hydroxide with precipitation of heavy metals ion, the solution of the heavy-metal ion removal point salt device that decrystallizes carries out a point salt, obtains
Sodium sulphate and sodium chloride.
2. a kind of method using disc tube reverse osmosis (dt-ro) integrated technology processing landfill leachate according to claim 1, special
Sign is: hydroxide described in step (4) is one of sodium hydroxide or calcium hydroxide.
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Cited By (8)
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| CN110240342A (en) * | 2019-06-26 | 2019-09-17 | 山东百川集大环境工程有限公司 | A kind of arid and cold region garbage leachate treatment device and method |
| CN110316893A (en) * | 2019-07-18 | 2019-10-11 | 烟台金正环保科技有限公司 | A kind of integrated treatment process of landfill leachate |
| CN110642479A (en) * | 2019-10-31 | 2020-01-03 | 重庆三峰科技有限公司 | Membrane concentrated solution reduction treatment system and treatment process thereof |
| CN110697983A (en) * | 2019-10-23 | 2020-01-17 | 绍兴市上虞众联环保有限公司 | Leachate treatment process |
| CN111252961A (en) * | 2020-01-21 | 2020-06-09 | 四川大学 | Treatment method of garbage penetrating fluid |
| CN111470694A (en) * | 2020-04-17 | 2020-07-31 | 联邦制药(内蒙古)有限公司 | Zero-discharge reclaimed water recycling process and system for pharmaceutical wastewater |
| CN112960817A (en) * | 2021-03-02 | 2021-06-15 | 浙江海禹环保科技有限公司 | Comprehensive treatment method and system for hydrazine hydrate waste salt |
| CN113860623A (en) * | 2021-12-06 | 2021-12-31 | 中节能润达(烟台)环保股份有限公司 | Novel mobile leachate treatment method and equipment |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110240342A (en) * | 2019-06-26 | 2019-09-17 | 山东百川集大环境工程有限公司 | A kind of arid and cold region garbage leachate treatment device and method |
| CN110240342B (en) * | 2019-06-26 | 2024-04-09 | 山东百川集大环境工程有限公司 | Device and method for treating landfill leachate in arid and cold regions |
| CN110316893A (en) * | 2019-07-18 | 2019-10-11 | 烟台金正环保科技有限公司 | A kind of integrated treatment process of landfill leachate |
| CN110697983A (en) * | 2019-10-23 | 2020-01-17 | 绍兴市上虞众联环保有限公司 | Leachate treatment process |
| CN110642479A (en) * | 2019-10-31 | 2020-01-03 | 重庆三峰科技有限公司 | Membrane concentrated solution reduction treatment system and treatment process thereof |
| CN111252961A (en) * | 2020-01-21 | 2020-06-09 | 四川大学 | Treatment method of garbage penetrating fluid |
| CN111470694A (en) * | 2020-04-17 | 2020-07-31 | 联邦制药(内蒙古)有限公司 | Zero-discharge reclaimed water recycling process and system for pharmaceutical wastewater |
| CN112960817A (en) * | 2021-03-02 | 2021-06-15 | 浙江海禹环保科技有限公司 | Comprehensive treatment method and system for hydrazine hydrate waste salt |
| CN113860623A (en) * | 2021-12-06 | 2021-12-31 | 中节能润达(烟台)环保股份有限公司 | Novel mobile leachate treatment method and equipment |
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