CN105036490A - Method for removing nitrogen through treating refuse leachate by using two-stage feedwater mineralized refuse reactor - Google Patents
Method for removing nitrogen through treating refuse leachate by using two-stage feedwater mineralized refuse reactor Download PDFInfo
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- CN105036490A CN105036490A CN201510533131.0A CN201510533131A CN105036490A CN 105036490 A CN105036490 A CN 105036490A CN 201510533131 A CN201510533131 A CN 201510533131A CN 105036490 A CN105036490 A CN 105036490A
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Abstract
The invention discloses a method for removing nitrogen through treating refuse leachate by using a two-stage feedwater mineralized refuse reactor. The method comprises the steps of arranging a two-stage mineralized refuse reactor combined system, carrying out synchronous nitration reaction on a certain ratio of leachate by using a first-stage mineralized refuse reactor to remove part of total nitrogen, and then, injecting the leachate into a second-stage mineralized refuse reactor; and meanwhile injecting the rest ratio of raw leachate serving as a supplementary carbon source to the second-stage mineralized refuse reactor, and further accelerating the denitrification of nitrate nitrogen of the leachate treated by the first-stage mineralized refuse reactor to increase the removal rate of the total nitrogen of the system. By using the two-stage mineralized refuse reactor combined system for treating the leachate in the method, a certain ratio of raw leachate is injected to the second-stage mineralized refuse reactor to supplement a denitrification carbon source on the basis that part of total nitrogen is removed by using the first-stage mineralized refuse reactor, so that the aim of removing nitrogen through denitrification is achieved to the maximum extent, and the removal rate of the total nitrogen is increased; and the leachate is treated by using mineralized refuses, so that the aim of treating wastes by using wastes is achieved.
Description
Technical field
The invention belongs to environmental protection and technical field of new energies, the method for particularly a kind of two-part water inlet mineralized waste reactor for treatment percolate denitrogenation.
Background technology
Along with the fast development of Chinese national economy and improving constantly of people's consumptive power, the output of domestic refuse is also in continuous increase.Within 2012, China's domestic waste output reaches 1.51 hundred million tons, and within 2013, China's municipal wastes total amount has reached 1.8 hundred million tons, and municipal wastes accounts for 30% of national rubbish total amount.The main method of China's domestic rubbish disposal is sanitary landfill, and this method can produce a large amount of percolate.Percolate is a kind of high concentrated organic wastewater of complicated component, has organic loading high, ammonia nitrogen and the feature such as heavy metal content is higher, landfill later stage biodegradability is poor, water quality and the water yield change greatly.Traditional leachate processing method exists that investment cost is high, processing cost is high, later stage operation energy consumption is large, complex technical process, occupation of land place are large, system is easily hit and the difficult problem such as up to standard of effluent quality, and thus the safe handling of percolate is the current a great problem faced.
Aged refuse reactor treating refuse percolate, not only treatment effect is good, is utilized by changing waste into resources fully, reach the object of the treatment of wastes with processes of wastes against one another, and processing cost is low, technical process and operational management simple and convenient, there is good environmental ecology meaning and economic benefit.
From the nineties in last century, some scholars have carried out some research work to aged refuse reactor treating refuse percolate.Forefathers' research all shows that mineralized waste bed has good treatment effect to ammonia nitrogen, but but fail to solve the high problem of effluent nitrate-nitrogen content, cause nitrogen removal rate not high, one of reason is just that denitrification process carbon source is not enough, the percolate carbon-nitrogen ratio entering oxygen-starved area and anaerobic zone is low, hinders the denitrification of nitrate nitrogen.
Summary of the invention
The object of this invention is to provide the method for a kind of two-part water inlet mineralized waste reactor for treatment percolate denitrogenation.
Thinking of the present invention: to meet ammonia nitrogen fully nitrated, under ensureing the prerequisite of ammonia nitrogen removal frank, part stoste percolate is directly added to denitrification zone, and organic matter wherein serves as the carbon source of denitrification process, improve the removal of nitrate in percolate, thus improve nitrogen removal rate.
Concrete steps are:
(1) a kind of two-stage mineralized waste reactor combined system is set, comprises two mineralized waste reactors, vent-pipe, under meter, air pump and controlling boxs; Two mineralized waste reactor side vertical direction evenly arrange three solid thief holes, and bottom sets out water sampling mouth and aeration tube, and aeration tube connects spinner-type flowmeter, and spinner-type flowmeter is connected with air pump, air pump connection control case; Controlling box is provided with temperature indicator, aeration switch and temperature switch; Vent-pipe is arranged on mineralized waste reactor central authorities, and the equidistant punching of tube wall, and its top seal and bottom are connected with aeration tube, and be beneficial to the cylinder internal diffusion of air to mineralized waste layer, gauze is wrapped up in vent-pipe outside, prevents mineralized waste from blocking ventilation hole; Mineralized waste reactor top is added a cover, and has covered funnel, for water filling, arranges valve between funnel and lid, covers the PVC board that the end adds the even cloth hole of one deck, for water distribution uniformity; Mineralized waste reactor loads gravel bed, mineralized waste layer and inclined-plane gravel bed from top to bottom respectively, the swash plate supporting oblique surface gravel bed in even cloth hole, and three temp probes evenly imbed mineralized waste layer, for measuring temperature in heap body.
(2) aeration rate and operating parameter are set by adjustment, by the two-stage mineralized waste reactor combined system treating refuse percolate that step (1) is arranged, first step mineralized waste reactor is synchronous nitration and denitrification reactor, and second stage mineralized waste reactor is denitrification reactor or the reactor based on denitrification, first step mineralized waste reactor does not process whole stoste percolates that whole process need process, but process accounts for the stoste percolate of total amount X%, remove on the basis of part total nitrogen at first step mineralized waste reactor, the water outlet percolate of the first step mineralized waste reactor containing finite concentration nitrate nitrogen and the stoste percolate accounting for total amount (100-X) % are mixed into second stage mineralized waste reactor, utilize the organic substance in the stoste percolate of this (100-X) % as the carbon source of nitrate nitrogen denitrification process, the removal of nitrate in further promotion percolate, thus raising nitrogen removal rate, described X=70 ~ 99.
The regulation range of described aeration rate and operating parameter comprises: first step mineralized waste reactor is synchronous nitration and denitrification reactor, and its aeration rate is 0.2 ~ 3.0m
3/ (m
3d), second stage mineralized waste reactor is denitrification reactor or the reactor based on denitrification, and its aeration rate is 0 ~ 0.4m
3/ (m
3d); Aeration position is arranged on the optional position between reactor bottom to reactor head 1/3rd place as the case may be; Influent load is 30 ~ 70L/ (m
3d); The water inlet frequency is 1 ~ 2 time/d; The particle diameter of mineralized waste is 4 ~ 10mm.
The advantage of the inventive method:
The two-stage mineralized waste reactor combination treatment permeated liquid system that the inventive method uses, remove on the basis of part total nitrogen at first step mineralized waste reactor, by certain proportion stoste percolate is injected second stage mineralized waste reactor supplementing denitrifying carbon source, farthest realize denitrification denitrogenation, improve nitrogen removal rate; And utilize mineralized waste process percolate, realize the treatment of wastes with processes of wastes against one another.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment of the present invention equipment therefor.
Mark in figure: 1-funnel; 2-gravel bed; 3-mineralized waste layer; 4-solid thief hole; 5-vent-pipe; 6-inclined-plane gravel bed; The swash plate in the even cloth hole of 7-; 8-water outlet thief hole; 9-valve; The PVC board in the even cloth hole of 10-; 11-temp probe; 12-spinner-type flowmeter; 13-air pump; 14-temperature indicator; 15-controlling box; 16-aeration switch; 17-temperature switch; A-first step mineralized waste reactor; B-second stage mineralized waste reactor.
Embodiment
embodiment:
(1) a kind of two-stage mineralized waste reactor combined system is set, comprises first step mineralized waste reactor A, second stage mineralized waste reactor B, vent-pipe 5, spinner-type flowmeter 12, air pump 13 and controlling box 15; Two mineralized waste reactors are 0.37m by diameter, it is highly the PVC pillar formation of 1.5m, its lateral vertical direction evenly arranges three solid thief holes 4, bottom sets out water sampling mouth 8 and aeration tube, aeration tube connects spinner-type flowmeter 12, spinner-type flowmeter 12 is connected with air pump 13, air pump 13 connection control case 15; Controlling box 15 is provided with temperature indicator 14, aeration switch 16 and temperature switch 17; Vent-pipe 5 is arranged on mineralized waste reactor central authorities, and the equidistant punching of tube wall (pipe diameter 2.5cm, aperture 0.6cm, hole vertical spacing 10cm), its top seal and bottom are connected with aeration tube, be beneficial to the cylinder internal diffusion of air to mineralized waste layer 3, gauze is wrapped up in vent-pipe 5 outside, prevents mineralized waste from blocking ventilation hole; Mineralized waste reactor top is added a cover, and has covered funnel 1, for water filling, arranges valve 9 between funnel 1 and lid, covers the PVC board 10 that the end adds the even cloth hole of one deck, for water distribution uniformity; Mineralized waste reactor loads gravel bed 2(from top to bottom respectively highly for 10cm, particle diameter are the gravel of 4cm and are highly 5cm, particle diameter is the little gravel of 1cm, as supporting layer with to catchment layer), highly be the little gravel of the mineralized waste layer 3 of 0.9m and inclined-plane gravel bed 6(highly 5cm, particle diameter 1cm), the swash plate 7 supporting oblique surface gravel bed 6 in even cloth hole, three temp probes 11 evenly imbed mineralized waste layer 3, for measuring temperature in heap body.
The mineralized waste used in the present embodiment and percolate are all taken from Guilin City and to be blurted out refuse landfill.
Above-mentioned mineralized waste is the mineralized waste with 10 years landfill ages, and after transporting laboratory back from landfill yard, sieved out 4 ~ 10mm particle size range with sieve, then fill out in mineralized waste reactor, packing density is 740kg/m
3; Mineralized waste outward appearance physical behavior shows as: similar soil, do not have peculiar smell.
The physico-chemical property of above-mentioned percolate is as shown in table 1.
Table 1 percolate raw water quality feature
(2) the two-stage mineralized waste reactor combined system treating refuse percolate arranged by step (1) (waters percolate by funnel 1, the valve 9 between funnel 1 and lid is closed after water inlet, start aeration simultaneously, enter every day before percolate and reacted percolate in the day before yesterday reactor is released, then close outlet valve immediately.Within in process of the test every three days, measure the change in concentration of each pollutent in a water outlet percolate), by regulating, aeration rate and operating parameter are set, first step mineralized waste reactor A is synchronous nitration and denitrification reactor, and second stage mineralized waste reactor B is denitrification reactor, first step mineralized waste reactor A does not process whole stoste percolates that whole process need process, but process accounts for the stoste percolate of total amount 75%, remove on the basis of part total nitrogen in first step mineralized waste reactor A, the water outlet percolate of the first step mineralized waste reactor A containing finite concentration nitrate nitrogen and the stoste percolate accounting for total amount 25% are mixed into second stage mineralized waste reactor B, utilize the organic substance in this stoste percolate of 25% as the carbon source of nitrate nitrogen denitrification process, the removal of nitrate in further promotion percolate, thus raising nitrogen removal rate.
Described aeration rate and operating parameter: first step mineralized waste reactor A adopts in bottom continuous aeration mode, and aeration rate is 1.86m
3/ (m
3d), continue aeration every day 6 hours, second stage mineralized waste reactor B adopts at reactor top 1/3rd place continuous aeration, and continue aeration every day 6 hours, aeration rate is respectively 0.372m
3/ (m
3.d); Influent load is 31L/ (m
3d); The water inlet frequency is 1 time/d.
Above-mentioned test run two months, result shows, after stable, nitrogen removal rate is stabilized in 71%-87%, and total nitrogen average removal rate is 76%; In addition COD
cralso achieve good removal effect with ammonia nitrogen, average removal rate is respectively 84% and 80%.
Claims (1)
1. a method for two-part water inlet mineralized waste reactor for treatment percolate denitrogenation, is characterized in that concrete steps are:
(1) a kind of two-stage mineralized waste reactor combined system is set, comprises two mineralized waste reactors, vent-pipe, under meter, air pump and controlling boxs; Two mineralized waste reactor side vertical direction evenly arrange three solid thief holes, and bottom sets out water sampling mouth and aeration tube, and aeration tube connects spinner-type flowmeter, and spinner-type flowmeter is connected with air pump, air pump connection control case; Controlling box is provided with temperature indicator, aeration switch and temperature switch; Vent-pipe is arranged on mineralized waste reactor central authorities, and the equidistant punching of tube wall, and its top seal and bottom are connected with aeration tube, and be beneficial to the cylinder internal diffusion of air to mineralized waste layer, gauze is wrapped up in vent-pipe outside, prevents mineralized waste from blocking ventilation hole; Mineralized waste reactor top is added a cover, and has covered funnel, for water filling, arranges valve between funnel and lid, covers the PVC board that the end adds the even cloth hole of one deck, for water distribution uniformity; Mineralized waste reactor loads gravel bed, mineralized waste layer and inclined-plane gravel bed from top to bottom respectively, the swash plate supporting oblique surface gravel bed in even cloth hole, and three temp probes evenly imbed mineralized waste layer, for measuring temperature in heap body;
(2) aeration rate and operating parameter are set by adjustment, by the two-stage mineralized waste reactor combined system treating refuse percolate that step (1) is arranged, first step mineralized waste reactor is synchronous nitration and denitrification reactor, and second stage mineralized waste reactor is denitrification reactor or the reactor based on denitrification, first step mineralized waste reactor does not process whole stoste percolates that whole process need process, but process accounts for the stoste percolate of total amount X%, remove on the basis of part total nitrogen at first step mineralized waste reactor, the water outlet percolate of the first step mineralized waste reactor containing finite concentration nitrate nitrogen and the stoste percolate accounting for total amount (100-X) % are mixed into second stage mineralized waste reactor, utilize the organic substance in the stoste percolate of this (100-X) % as the carbon source of nitrate nitrogen denitrification process, the removal of nitrate in further promotion percolate, thus raising nitrogen removal rate, described X=70 ~ 99,
The regulation range of described aeration rate and operating parameter comprises: first step mineralized waste reactor is synchronous nitration and denitrification reactor, and its aeration rate is 0.2 ~ 3.0m
3/ (m
3d), second stage mineralized waste reactor is denitrification reactor or the reactor based on denitrification, and its aeration rate is 0 ~ 0.4m
3/ (m
3d); Aeration position is arranged on the optional position between reactor bottom to reactor head 1/3rd place as the case may be; Influent load is 30 ~ 70L/ (m
3d); The water inlet frequency is 1 ~ 2 time/d; The particle diameter of mineralized waste is 4 ~ 10mm.
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Cited By (4)
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| 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 |
| CN112209506A (en) * | 2020-10-22 | 2021-01-12 | 江苏美能膜材料科技有限公司 | High-concentration dimethylacetamide wastewater treatment device and treatment method |
| CN113552037A (en) * | 2021-06-03 | 2021-10-26 | 浙江大学 | Device and method for testing dual-porosity seepage parameters of garbage |
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| CN108246761A (en) * | 2018-03-21 | 2018-07-06 | 桂林理工大学 | A kind of method for accelerating landfill waste methanation |
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| CN112209506A (en) * | 2020-10-22 | 2021-01-12 | 江苏美能膜材料科技有限公司 | High-concentration dimethylacetamide wastewater treatment device and treatment method |
| CN113552037A (en) * | 2021-06-03 | 2021-10-26 | 浙江大学 | Device and method for testing dual-porosity seepage parameters of garbage |
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| CN105036490B (en) | 2017-04-12 |
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Effective date of registration: 20210111 Address after: 570000 room e, 18 / F, Xingli international building, 13 Wenhua Road, Longhua District, Haikou City, Hainan Province Patentee after: Hainan Muzhiyuan Environmental Protection Service Co.,Ltd. Address before: 541004 the Guangxi Zhuang Autonomous Region Guilin Construction Road No. 12 Patentee before: GUILIN University OF TECHNOLOGY |