CN202046971U - Zero-discharge recirculation device of anaerobic percolate - Google Patents
Zero-discharge recirculation device of anaerobic percolate Download PDFInfo
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- CN202046971U CN202046971U CN201120112246XU CN201120112246U CN202046971U CN 202046971 U CN202046971 U CN 202046971U CN 201120112246X U CN201120112246X U CN 201120112246XU CN 201120112246 U CN201120112246 U CN 201120112246U CN 202046971 U CN202046971 U CN 202046971U
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Abstract
The utility model discloses a zero-discharge recirculation device of anaerobic percolate. A fresh rubbish anaerobic reactor (1) is connected in series with a mineralized rubbish natural ventilation reactor (2); the upper part and the lower part of the fresh rubbish anaerobic reactor (1) are provided with gravel stratums (3); a normally closed water outlet valve (5) is arranged at the bottom of the fresh rubbish anaerobic reactor (1); a cover water seal (6) is arranged on the top of the fresh rubbish anaerobic reactor (1); fresh rubbish (4) is arranged in the middle of the fresh rubbish anaerobic reactor (1); a central ventilation pipe (8) is arranged inside the mineralized rubbish natural ventilation reactor (2); the lower part of the mineralized rubbish natural ventilation reactor (2) is provided with the gravel stratum (3); a normally open water outlet valve (10) is arranged at the bottom of the mineralized rubbish natural ventilation reactor (2); the upper part of the mineralized rubbish natural ventilation reactor (2) is provided with a water distribution layer (9); and mineralized rubbish (7) is arranged in the middle of the mineralized rubbish natural ventilation reactor (2). Due to the adoption of the zero-discharge recirculation device, the stabilization of fresh rubbish can be accelerated, the treating period of the percolate is shortened, the water quality of the percolate is improved, zero discharge of the percolate is realized, and the power consumption in the recirculation process is lowered. According to calculation, the chemical oxygen demand (COD) concentration of the percolate is lowered to a third-level standard 1,000 mg/L within 2.2 years. The reduced quantity of the percolate is up to 98.3 percent.
Description
Technical field
The utility model relates to a kind of device of percolate circulated backfilling after mineralized waste is handled of domestic waste generation, belongs to environmental technology field.
Background technology
The bio-reactor landfill technology that occur the eighties in 20th century, with the leachate recirculation is major measure, strengthen the bioprocess of microorganism in the landfill waste, quicken waste stabilisation, the waste stabilisation cycle length and the percolate that have solved traditional sanitary filling field existence are to a certain extent handled difficult problem.But because the surplus labile organic compound content height that waits in China domestic waste kitchen, landfill initial stage new refuse percolate stoste recirculation process exists some problems: 1. organic acid accumulation, organic pollutant are high for a long time; 2. be subjected to the restriction of anaerobism landfill yard characteristic, the percolate ammonia nitrogen concentration after recharging is very high; 3. can not eliminate percolate fully, could discharge after still needing further to handle.These problems have seriously been slowed down new refuse stabilization speed.Therefore, how the processing by percolate solves the problem that new refuse percolate stoste recirculation process exists, and exploitation is fit to the leachate recirculation technology of China's national situation targetedly, to give full play to the advantage of leachate recirculation, quickening the new refuse stabilization, is a problem that is worth research.
Landfill percolate has polluting properties such as the fluctuation of water quality complexity, the water yield is big, hazardous and noxious substances content height.Up to now, nearly all sewage water treatment method all has been used for the processing of percolate, but mostly runs into problems such as water outlet difficulty up to standard, processing cost are higher, system stability difference.Therefore, percolate is handled in the landfill yard daily administration, and a difficult problem has become international.Since nineteen ninety-five, there is the researchist to propose the novel process that mineralized refuse bioreactor is handled landfill percolate, has that technology is simple, easy to maintenance, anti-shock loading performance height, need not characteristics such as aeration and equipment for separating liquid from solid, no mud generation, long service life.Landfill waste is widely distributed, and quantity is a lot, never obtains effective recycling.Utilize mineralized waste to come the treating refuse percolate not only for the sustainability landfill of landfill reservoir area provides possibility, and meet the environmental protection concept of " waste recycling " as biologic packing material.
But no matter adopt which kind of treatment technology, the percolate problem all is subjected to the influence of waste stabilisation.The waste stabilisation time is long more, and it is just long more that percolate is handled the cycle.Existing studies show that, refuse landfill percolate water outlet COD under field conditions (factors) reaches about 12 years of time of 1000mg/L emission standard, it is longer that ammonia nitrogen will reach the time that the 15mg/L emission standard needs, and that is to say that under field conditions (factors) the degraded of rubbish is extremely slowly.And adopt stoste to recharge, the time that percolate COD reaches the 1000mg/L emission standard also needed more than 5 years, and can't solve the ammonia nitrogen problem; In addition, the percolate water yield is cut down limited.
The utility model content
The purpose of this utility model provides a kind of device that quickens new refuse stabilization, shortening percolate processing cycle, improves leachate quality and the zero release of realization percolate.
The utility model is achieved in that new refuse anaerobic reactor and mineralized waste natural ventilation reactors in series, the percolate that first step new refuse reactor produces enters placed in-line second stage mineralized waste natural ventilation reactor, circulated backfilling is to the new refuse reactor after mineralized waste is handled for percolate, and percolate does not efflux.The new refuse anaerobic reactor is in closed state, and the upper and lower is a gravel bed, and the bottom flowing water Valve often closes, the top cover water seal, and the centre is a new refuse.Mineralized waste natural ventilation inside reactor is provided with central draft tube, and the bottom is a gravel bed, and the bottom flowing water Valve is often opened, and top is water distribution layer, and the top does not add lid, is in opening-wide state, and the centre is a mineralized waste.The frequency of recharging of new refuse anaerobic reactor and mineralized waste natural ventilation reactor is 1 time/d, recharge hydraulic load at 0-10mL/kg rubbish d, add tap water once to mineralized waste natural ventilation reactor weekly, with simulation precipitation, simulate quantity of precipitation=local of that month average precipitation (mm) * cross-sectional reactor area (mm weekly
2)/4; The water distribution manner that the new refuse reactor recharges percolate adopts french drain to recharge, and the water distribution manner of mineralized waste natural ventilation reactor adopts surface sprinkling.
The utility model is handled the relative merits of percolate technology and leachate recirculation technology according to mineralized waste, with new refuse reactor and mineralized waste natural ventilation reactors in series, the percolate that first step new refuse reactor produces enters placed in-line second stage mineralized waste reactor, circulated backfilling is to the new refuse reactor after mineralized waste is handled for percolate, and percolate does not efflux.Because through mineralising, leachate quality makes moderate progress after the refuse treatment, recharges in the new refuse just to be expected to solve the dense more problem of filling more again.Quicken waste stabilisation, shorten the garbage loading embeading cycle, and the processing cycle of percolate.Because percolate does not efflux, and the Evaporation by in the mineralized waste processing percolate process makes the amount of recharging of percolate more and more littler, finally realizes the percolate zero release, because percolate passes through anaerobic denitrifying and aerobic nitrification repeatedly, makes the ammonia nitrogen removal effect in the percolate very obvious.
Description of drawings
Fig. 1 is the utility model schema.
Fig. 2 is the utility model new refuse anaerobic reactor and mineralized waste natural ventilation reactor cross section figure.
Mark among the figure: 1-new refuse anaerobic reactor, 2-mineralized waste natural ventilation reactor, the 3-gravel bed, the 4-new refuse, the 5-outlet valve often closes, the 6-water seal, the 7-mineralized waste, the 8-vent-pipe, the 9-water distribution layer, the 10-outlet valve is often opened.
Embodiment
Embodiment:
As shown in Figure 2, new refuse anaerobic reactor 1 is connected with mineralized waste natural ventilation reactor 2, the percolate that first step new refuse reactor 1 produces enters placed in-line second stage mineralized waste natural ventilation reactor 2, circulated backfilling is to new refuse reactor 1 after mineralized waste is handled for percolate, and percolate does not efflux.New refuse anaerobic reactor 1 is in closed state, and the upper and lower is a gravel bed 3, and the bottom flowing water Valve is normal to close 5, top cover water seal 6, and the centre is a new refuse 4.Mineralized waste natural ventilation reactor 2 inside are provided with central draft tube 8, and the bottom is a gravel bed 3, and the bottom flowing water Valve often opens 10, and top is water distribution layer 9, and the top does not add lid, is in opening-wide state, and the centre is a mineralized waste 7.The frequency of recharging of new refuse anaerobic reactor 1 and mineralized waste natural ventilation reactor 2 is 1 time/d, recharge hydraulic load at 0-10mL/kg rubbish d, add tap water once to mineralized waste natural ventilation reactor weekly, with simulation precipitation, simulate quantity of precipitation=local of that month average precipitation (mm) * cross-sectional reactor area (mm weekly
2)/4.Nanhui, Shanghai each monthly average quantity of precipitation of 1956～nineteen eighty-two sees Table 1.The water distribution manner that new refuse reactor 1 recharges percolate adopts french drain to recharge, and the water distribution manner of mineralized waste natural ventilation reactor 2 adopts surface sprinkling.
Each monthly average quantity of precipitation (mm) of table 1 Shanghai Nanhui 1956-1982
| |
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| Quantity of precipitation | 44.1 | 62.3 | 79.3 | 103.1 | 126.2 | 153 | 93.2 | 115.1 | 173.6 | 56.7 | 50.8 | 42.5 |
Employed new refuse is from the residential quarter, Shanghai City, this residential quarter size of population about 10000, and the age structure of population is more reasonable, and resident's level just has concurrently, and standard of living has certain otherness.
The rubbish of sub-district fortune is weighed earlier, back bale broken, again the rider that is respectively 120mm, 40mm and 8mm with the aperture with sieving garbage become particle diameter be respectively＞120mm, 40～120mm, 8～40mm and＜rubbish of 8mm.Then to the rubbish of different-grain diameter classify (particle diameter＜8mm except), being divided into is 12 classes, is respectively biodegradable organic, plastics, stationery (paper, fiber board and carton), packing material, yarn fabric, glass, ferrous metal, non-ferrous metal, wooden unit, mineral constituent, specific refuse and remaining thing.
The rubbish of being got is the biodegradable organic of particle diameter less than 120mm, and wherein the kitchen is surplus more, and household garbage is main, and the fruits refuse is more, and more vegetable fibre is arranged; As shown in table 2 to the detection data that this kind rubbish carries out.
Table 2: the main physico-chemical property of new refuse
| Index name | Water ratio (%) | Burning weight loss (%) | Hot igloss degree (%) | Mean load density (weight in wet base kg/m 3) |
| New refuse | 76.7～78.5 | 92～94.5 | 71.4～81.9 | 850 |
The mineralized waste that is used to handle percolate is taken from waste treatment field, old port, adopts the mineralized waste in 10 years landfill ages, adopts the 8mm rider to sieve, screen underflow outward appearance physical behavior shows as: a little coacervate and saccharoid refer to and can twist into pieces, sand type is stronger, does not have peculiar smell, similar soil.The rubbish physicochemical character is as shown in table 3 below.
Table 3: the main thing chemistry of mineralized waste character
New refuse reactor and mineralized waste natural ventilation reactor, all adopting diameter is 0.3m, highly is the PVC pillar of 1.3m, and reactor lower part sets out the mouth of a river (percolate thief hole), and the centre is provided with the rubbish thief hole.
All recharge the percolate that new refuse produces after the mineralized waste reactor for treatment every day, and sampling in average per about 10 days is once got the about 100mL of percolate at every turn in the process of the test, and in time replenishes the percolate from old port landfill yard of equivalent.
Add tap water once to mineralized waste natural ventilation reactor weekly, with simulation precipitation.Institute's amount of water calculates according to about 10% of Nanhui, Shanghai each monthly average precipitation of 1956～nineteen eighty-two.
Through the operation in 1 year, new refuse reactor water outlet percolate COD was from the 30000mg/L of 100000mg/L when having dropped to off-test of beginning; Ammonia nitrogen has dropped to 2900mg/L from 4200mg/L, and to off-test time accumulative total clean to produce the ammonia nitrogen amount be 2127mg ammonia nitrogen/kg rubbish.Because the water outlet of new refuse reactor is the water inlet of mineralized waste reactor, the water outlet of mineralized waste reactor is the water inlet of new refuse reactor in the test, and therefore, the clean ammonia nitrogen amount of producing of new refuse reactor accumulative total is suitable with mineralized waste reactor accumulative total degradation of ammonia nitrogen amount.
Calculate according to fitting formula, percolate COD concentration will drop to grade III Standard 1000mg/L, only needs 2.2 years, recharge faster than stoste far away 6 years.The percolate ammonia nitrogen concentration will drop to primary standard 15mg/L, only needs 6 years half.The utility model is a 248mL/kg rubbish in duration of test percolate accumulative total net production, and the percolate accumulative total amount of recharging is a 505mL/kg rubbish, and the percolate reduction reaches 98.3%, has reduced the power consumption of recharging in the process, has realized the percolate zero release.
Claims (1)
1. anaerobic type percolate zero release backflow device, it is characterized in that: new refuse anaerobic reactor (1) is connected with mineralized waste natural ventilation reactor (2), new refuse anaerobic reactor (1) upper and lower is gravel bed (3), the bottom flowing water Valve often closes (5), top cover water seal (6), the centre is new refuse (4); Mineralized waste natural ventilation reactor (2) inside is provided with central draft tube (8), and the bottom is gravel bed (3), and the bottom flowing water Valve is often opened (10), and top is water distribution layer (9), and the centre is mineralized waste (7).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201120112246XU CN202046971U (en) | 2011-04-15 | 2011-04-15 | Zero-discharge recirculation device of anaerobic percolate |
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| CN201120112246XU CN202046971U (en) | 2011-04-15 | 2011-04-15 | Zero-discharge recirculation device of anaerobic percolate |
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| CN201120112246XU Expired - Fee Related CN202046971U (en) | 2011-04-15 | 2011-04-15 | Zero-discharge recirculation device of anaerobic percolate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103466796A (en) * | 2013-09-27 | 2013-12-25 | 桂林理工大学 | Method for carrying out synchronous nitrification treatment and denitrification treatment on percolate by using mineralized refuse reaction bed |
-
2011
- 2011-04-15 CN CN201120112246XU patent/CN202046971U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103466796A (en) * | 2013-09-27 | 2013-12-25 | 桂林理工大学 | Method for carrying out synchronous nitrification treatment and denitrification treatment on percolate by using mineralized refuse reaction bed |
| CN103466796B (en) * | 2013-09-27 | 2015-01-21 | 桂林理工大学 | Method for carrying out synchronous nitrification treatment and denitrification treatment on percolate by using mineralized refuse reaction bed |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111123 Termination date: 20120415 |