CN1562508A - New technique of prepositive replenishment treatment of denitrification denitrfication for preoclating water in two-stage mineralization garbage - Google Patents
New technique of prepositive replenishment treatment of denitrification denitrfication for preoclating water in two-stage mineralization garbage Download PDFInfo
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- CN1562508A CN1562508A CN 200410017554 CN200410017554A CN1562508A CN 1562508 A CN1562508 A CN 1562508A CN 200410017554 CN200410017554 CN 200410017554 CN 200410017554 A CN200410017554 A CN 200410017554A CN 1562508 A CN1562508 A CN 1562508A
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- unit
- denitrification
- nitrated
- percolate
- water
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Abstract
A process for treating the percolated liquid of garbage features that the two stages of mineralized garbage are respectively used as nitrifying unit and denitrifying unit and the water coming from nitrifying unit is flowing back to dinitrifying unit for denitrifying it. Its advantage is high quality of treated water.
Description
Technical field
The invention belongs to environmental technology field, be specifically related to a kind of mineralized waste leachate recirculation New Process for Treatment.
Background technology
It is a present worldwide difficult problem that the percolate of landfill waste is handled, and the subject matter that adopts conventional water technology to carry out percolate processing existence is: water outlet is difficult to up to standard, construction costs and operating cost height.Be not at present do not exist can be up to standard technology, the most basic problem is the operating cost height, the operating cost that reaches standard fully is usually about 80 yuan/ton.
The method of recharging handle percolate be exactly the percolate that will collect bottom the landfill yard with suitable method from the covering layer of landfill site surface or the cover layer bottom pour into landfill yard again, utilize landfill yard waste layer this " bacteria bed ", by the aerobic microbiological of upper soll layer, the degradation of anaerobe in the landfill layer and absorption, ion-exchange and the chelation etc. of soil particle, percolate is purified.Utilize mineralized waste to recharge the processing percolate and have operation conveniently, construction costs and operating cost are low, and effluent quality waits technology economy advantage well.When utilizing multistage mineralized waste tandem process to handle percolate, water outlet NH
3-N concentration can maintain below the 15mg/L, COD can stable maintenance below 1000mg/L.But first problem water outlet nitrogen removal rate that utilizes mineralized waste tandem process processing percolate to exist is low, and nitrogen removal rate is usually less than 50%.Have contradiction between second problem nitrogen removal rate and the effluent quality, promptly will keep higher nitrogen removal rate, the water outlet total nitrogen is based on the ammonia nitrogen form, causes the water outlet ammonia nitrogen can not be up to standard, simultaneously the effluent COD concentration height; Effluent quality is that ammonia nitrogen concentration and COD concentration are low if keep preferably, and then the water outlet nitrogen removal rate is low.
Summary of the invention
The objective of the invention is to propose the percolate denitrogenation that a kind of effluent quality is good, nitrogen removal rate is high and recharge treatment process.
Treatment process is recharged in the percolate denitrogenation that the present invention proposes, and adopts the two-stage mineralized waste respectively as nitrated unit and denitrification unit, and nitrated unit effluent recycling is realized denitrogenation processing in the denitrification unit.Claim that the present invention recharges treatment process for two-stage mineralized waste pre-denitrification and denitrogenation.
Processing step of the present invention (seeing shown in Figure 1) is as follows:
Backflow percolate after pending percolate and the nitrated cell processing enters denitrification unit 1 according to mixing to certainty ratio, realizes NO in the denitrification unit
3The removal of the denitrification denitrogenation of-N and portion C OD; Percolate enters nitrated unit 2 after handling through denitrification, realizes the removal and the NH of most COD in nitrated unit
3-N's is nitrated.The overall anaerobic environment that is is kept by the control of air inflow in denitrification unit 1, and the overall aerobic environment that is is kept by air inflow control in nitrated unit 2.Denitrifying carbon source is provided by organic carbon source in the pending percolate.
Among the present invention, denitrification unit 1 can be made up of several (2-5) mineralized waste units in series respectively with nitrated unit 2.
Process control condition: it is 0.01-0.1m that denitrification unit 1 recharges hydraulic load
3/ m
2D, wherein, entering the new pending percolate of denitrification unit 1 is 1 with hydraulic load ratio from nitrated unit 2 backflow percolating fluids: 1-1: 1.8, recharging frequency is 1-2 time/day, nitrated unit 2 effluent recyclings ratio is 50%～200%, denitrification unit COD clearance reaches about 50%, and the water yield is cut down and reached about 20%, and water distribution manner adopts surface sprinkling or overland flow; Denitrification unit 1 water outlet percolate enters nitrated unit 2, and water distribution manner adopts surface sprinkling or overland flow.Nitrated unit 2 is handled the back water yields and is cut down and reach about 20%, and water outlet COD is stable to be lower than 1000mg/L, NH
3-N concentration stabilize is lower than 15mg/L, and technology COD clearance reaches more than 90%, and nitrogen removal rate reaches more than 80%, NH
3-N clearance reaches more than 99%.
Description of drawings
Fig. 1 is a process flow diagram of the present invention.
Number in the figure: 1 is the denitrification unit, and 2 is nitrated unit.
The specific embodiment
Adopting two diameters is 0.4m, highly be 1.3m cast iron post as denitrification and nitrated unit, by control air inflow keep denitrification and nitrated environment in the different pillars.Handle percolate and derive from Shanghai Lao Gang landfill yard regulating reservoir.
The water inlet hydraulic load of denitrification unit (pending percolate) is 0.02m
3/ m
2D, reflux ratio is 130%.The hydraulic load of the backflow percolate of nitrated unit is 0.03m
3/ m
2D, effluent recycling is than being 50-200%.Water inlet is as follows with effluent quality:
Leachate quality (except the mg/L pH of unit) before and after handling
Water quality index COD
CrBOD
5TN NH
3-N NO
3-N pH
Influent concentration 11000～15,000 4600～6,000 1340～1,770 1200～1650＜15 7.0～8.0
Go out water concentration 280～350 15～35 180～245＜15 120～210 7.0～8.0
Average removal rate
＞95 ＞99 ＞80 ＞99 — —
(％)
Claims (3)
1, a kind ofly bury a percolate denitrogenation and recharge treatment process, it is characterized in that adopting the two-stage mineralized waste respectively as denitrification unit (1) and nitrated unit (2), nitrated unit effluent recycling is realized denitrogenation in the denitrification unit; Overall anaerobic environment is kept by the control of air inflow in denitrification unit (1), and nitrated unit (2) keep the overall aerobic environment that is by air inflow control.
2, treatment process according to claim 1 is characterized in that denitrification unit (1) and nitrated unit (2) are made up of several mineralized waste units in series respectively.
3, treatment process according to claim 1 is characterized in that process control condition is as follows: denitrification unit (1) recharges hydraulic load is 0.01-0.1m
3/ m
2D, wherein, the new pending percolate that enters denitrification unit (1) is 1 with hydraulic load ratio from nitrated unit (2) backflow percolating fluid: 1-1: 1.8, recharging frequency is 1-2 time/sky, nitrated unit (2) effluent recycling ratio is 50%～200%; Water distribution manner adopts surface sprinkling or overland flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410017554 CN1562508A (en) | 2004-04-08 | 2004-04-08 | New technique of prepositive replenishment treatment of denitrification denitrfication for preoclating water in two-stage mineralization garbage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410017554 CN1562508A (en) | 2004-04-08 | 2004-04-08 | New technique of prepositive replenishment treatment of denitrification denitrfication for preoclating water in two-stage mineralization garbage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1562508A true CN1562508A (en) | 2005-01-12 |
Family
ID=34479036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410017554 Pending CN1562508A (en) | 2004-04-08 | 2004-04-08 | New technique of prepositive replenishment treatment of denitrification denitrfication for preoclating water in two-stage mineralization garbage |
Country Status (1)
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| CN (1) | CN1562508A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101269856B (en) * | 2008-03-27 | 2011-04-27 | 清华大学 | Method and special apparatus for refuse leachate disposal |
| CN101717169B (en) * | 2009-12-07 | 2012-06-13 | 浙江大学 | In-situ denitrification method of percolate of domestic refuse landfill |
| CN105036491A (en) * | 2015-08-27 | 2015-11-11 | 桂林理工大学 | Two-stage mineralized refuse reactor combination device |
| CN108246761A (en) * | 2018-03-21 | 2018-07-06 | 桂林理工大学 | A kind of method for accelerating landfill waste methanation |
| CN108500024A (en) * | 2018-03-21 | 2018-09-07 | 桂林理工大学 | A kind of device accelerating landfill waste methanation |
-
2004
- 2004-04-08 CN CN 200410017554 patent/CN1562508A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101269856B (en) * | 2008-03-27 | 2011-04-27 | 清华大学 | Method and special apparatus for refuse leachate disposal |
| CN101717169B (en) * | 2009-12-07 | 2012-06-13 | 浙江大学 | In-situ denitrification method of percolate of domestic refuse landfill |
| CN105036491A (en) * | 2015-08-27 | 2015-11-11 | 桂林理工大学 | Two-stage mineralized refuse reactor combination device |
| CN105036491B (en) * | 2015-08-27 | 2017-05-31 | 桂林理工大学 | A kind of two-stage mineralized waste reactor combined apparatus |
| CN108246761A (en) * | 2018-03-21 | 2018-07-06 | 桂林理工大学 | A kind of method for accelerating landfill waste methanation |
| CN108500024A (en) * | 2018-03-21 | 2018-09-07 | 桂林理工大学 | A kind of device accelerating landfill waste methanation |
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