CN103145246B - Device and method for controlling runoff pollution of farmland for large-scale farming - Google Patents
Device and method for controlling runoff pollution of farmland for large-scale farming Download PDFInfo
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- CN103145246B CN103145246B CN 201310106586 CN201310106586A CN103145246B CN 103145246 B CN103145246 B CN 103145246B CN 201310106586 CN201310106586 CN 201310106586 CN 201310106586 A CN201310106586 A CN 201310106586A CN 103145246 B CN103145246 B CN 103145246B
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Abstract
本发明公开了一种规模化种植业农田控制径流污染的装置及控制方法，属于环境工程领域。该装置包括沟体、缺氧区、好氧区、进水口和进泥口，还包括厌氧区，所述的厌氧区、缺氧区和好氧区依次首尾相接构成一组废水处理组；所述的废水处理组有2-5组，废水处理组之间依次串联形成A2O氧化沟。该方法的步骤为：A）将废水和泥料通入预先放置有竹丝填料的厌氧区；B）进行脱氮处理；C）废水从缺氧区进入好氧区，鼓风曝气；D）废水排出或者循环到第一个厌氧区。本发明中废水处理组串联形成A2O氧化沟，可以增加水力停留时间，竹丝填料可作为缓释碳源提供碳源，不但生产和使用成本低，而且处理效果好，极具工程实践性，利于推广和应用。
The invention discloses a device and a control method for controlling runoff pollution in large-scale planting farmland, belonging to the field of environmental engineering. The device includes ditch body, anoxic zone, aerobic zone, water inlet and mud inlet, and also includes anaerobic zone. The anaerobic zone, anoxic zone and aerobic zone are connected end to end to form a set of waste water treatment groups; the wastewater treatment groups include 2-5 groups, and the wastewater treatment groups are sequentially connected in series to form an A 2 O oxidation ditch. The steps of the method are: A) passing the waste water and mud into the anaerobic area pre-placed with bamboo silk filler; B) performing denitrification treatment; C) the waste water enters the aerobic area from the anoxic area, and blows and aerates; D) Wastewater is discharged or recycled to the first anaerobic zone. In the present invention, the wastewater treatment groups are connected in series to form an A2O oxidation ditch, which can increase the hydraulic retention time, and the bamboo silk filler can be used as a slow-release carbon source to provide a carbon source, which not only has low production and use costs, but also has a good treatment effect, which is very practical in engineering , which is conducive to promotion and application.
Description
Technical field
The invention belongs to field of environment engineering, more particularly, relate to device and control method that runoff pollution is controlled in a kind of large-scale planting industry farmland, adopt A
2the O oxidation Ditch Technology focuses on agricultural run-off.
Background technology
In recent years, along with the fast development of Chinese society economy, body eutrophication trend is day by day serious.Cause the source of pollution of eutrophication can be divided into point-source pollution and pollution of area source, along with the increasing of point-source pollution management, the control of pollution of area source becomes the key of cutting down the external source pollution load gradually, and rural activity to the contribution rate of pollution of area source up to 75%.The pollutent that agricultural run-off carries is the important component part of farming region pollution of area source, and simultaneously, this is also the important factor that causes the body eutrophications such as lake, river and ocean.Therefore control the pollution of agricultural run-off, for the reduction of prevention and cure of pollution and the outrophication risk [Yang Linzhang that has great importance, Zhou little Ping, Wang Jianguo, Deng. for ecological intercepting type sewerage and the effect thereof of controlling farmland non-point pollution. ecological magazine, 2005,24 (11): 1371-1374].
A
2o(anaerobic-anoxic-oxic method) be a kind of sewage treatment process commonly used, can be used for B-grade sewage processes or three grades of sewage disposals and middle water reuse, there is good Nitrogen/Phosphorus Removal [Gao Tingyao, Gu Guowei, Zhou Qi, Water Pollution Control Engineering (the 3rd edition), Higher Education Publishing House, Beijing, 2007].But A
2o technique has its intrinsic shortcoming, wherein topmost problem be under anaerobic environment denitrification with release the competition of phosphorus to carbon source.
The characteristics of the oxidation ditch process continuous circulation that is sewage in the spaces such as circular or annular, have long, the advantage such as sludge loading is low, shock resistance is strong of the residence time.But the denitrogenation dephosphorizing function of oxidation ditch self a little less than, therefore, in order to strengthen the processing to nitrogen phosphorus, often at oxidation ditch water inlet leading portion, increase anaerobism section (pond) and anoxic section (pond), but this has just increased cost, has the shortcoming that floor space is too large simultaneously.
Current agricultural run-off is processed technology commonly used and is comprised: artificial swamp, oxidation pond, biological filter and soil filtration technology etc.For example the open a name of China Patent Publication No. CN 101723560A is called the patent document of processing dispersed wastewater integrated A/O bacteria filter device, this invention relates to a kind of processing dispersed wastewater integrated A/O bacteria filter device, the device profile is cylinder-like structure, the device center is provided with columnar vertical-flow preliminary sedimentation tank, between inside and outside cylindrical shell, partition wall is set, will be divided into equalizing tank, anoxic biological filter, aerobic biofilter, clean water basin, storage basin on space.Anoxic biological filter, aerobic biofilter and clean water basin are concentric(al) circles arc structure.Sewage in equalizing tank is lifted into preliminary sedimentation tank through airlift, and after precipitation, sewage is distributed into the denitrogenation of anoxic biological filter together with the backflow nitrification liquid, and the bottom of anoxic pond and middle portion are provided with the back flushing pipeline, can realize the segmentation back flushing; Anoxic pond is communicated with the aerobic biofilter bottom, and after denitrogenation, sewage enters the clean water basin water outlet from surperficial overflow after aerobic biofilter is removed organism, nitration treatment.Yet this technique, often due to low carbon source and hydraulic detention time is short etc. that reason can't complete the effective removal to Farmland Flow Pollution, is removed the raising of standard simultaneously along with N, P, single Ecological Disposal technology is difficult to efficient degradation and gets rid of the nitrogen phosphorus in water.
Summary of the invention
the problem solved
The object of the invention is to overcome the deficiencies in the prior art; solve in the agricultural run-off treating processes and have the carbon source deficiency; the problem of nitrogen phosphorus poor processing effect; provide a kind of large-scale planting industry farmland to control device and the control method of runoff pollution; the present invention can effectively tackle the nitrogen phosphorus in farmland drainage; the efficient Farmland Flow Pollution of processing, have that pollution control is effective, Operation and Maintenance simple and be convenient to the characteristics such as large scale application.
technical scheme
In order to address the above problem, the technical solution adopted in the present invention is as follows:
The device of runoff pollution is controlled in a kind of large-scale planting industry farmland, comprises ditch body, oxygen-starved area, aerobic zone, water-in and mud inlet, also comprises anaerobic zone, and described water-in all is connected with the ditch body with mud inlet; Described ditch body is connected with anaerobic zone; Described anaerobic zone, oxygen-starved area and aerobic zone be one group of wastewater treatment group of end to end formation successively; Described wastewater treatment group has the N group, between the wastewater treatment group, connects successively and forms A
2the O oxidation ditch, the aerobic zone of every group of wastewater treatment group is connected with the anaerobic zone of next group wastewater treatment group, one end of the aerobic zone of last group wastewater treatment group has water outlet, and an end of the aerobic zone of last group wastewater treatment group is connected with the anaerobic zone of first group of wastewater treatment group; Described N equals the 2-5 group; There is impeller inside, oxygen-starved area, can boosting water flow; The degree of depth of described anaerobic zone equals 1.2-1.8 times of the oxygen-starved area degree of depth.The series connection of wastewater treatment group forms A
2the O oxidation ditch, can increase hydraulic detention time greatly, and anaerobic zone, oxygen-starved area and being arranged alternately of aerobic zone can efficiently be removed nitrogen phosphorus simultaneously.
Further, described anaerobic zone has filler, and described filler is bamboo silk filler.Bamboo silk filler can be used as the slowly-releasing carbon source and provides carbon source for anaerobic stages and the biochemical reaction in anoxic stage.
Further, described aerobic zone bottom is provided with aerating apparatus.
The method of runoff pollution is controlled in a kind of large-scale planting industry farmland, the steps include:
A) waste water and pug are passed into to the anaerobic zone that is placed with in advance bamboo silk filler;
B) waste water steps A) flows in oxygen-starved area from anaerobic zone, carries out denitrogenation processing;
C) waste water after denitrogenation enters aerobic zone from oxygen-starved area, and the aerating apparatus in aerobic zone carries out blast aeration, makes the organism in aerobic degradation waste water;
D) waste water enters in anaerobic zone of next group wastewater treatment group, if when waste water arrives the aerobic zone of last group wastewater treatment group, waste water is up to standard, by water outlet, discharges, if below standard, waste water circulation is to first group of anaerobic zone, and above step process circulates.
The degree of depth of anaerobic zone equals 1.2-1.8 times of the oxygen-starved area degree of depth, is more conducive to the generation of anaerobic environment.Meanwhile, anti-nitration reaction occurring in oxygen-starved area, changes nitric nitrogen into nitrogen.The aerobic zone blast aeration, by the aerobic degradation organism.Anaerobic zone is mainly for supplementary carbon source, adjusts the waste water nutritive props, for follow-up biochemical reaction provides condition; Oxygen-starved area is mainly for denitrogenation; Aerobic zone, by the aerating apparatus blast aeration, is controlled dissolved oxygen content, and the biochemical reaction degradation of organic substances occurs; Simultaneously, utilize the impeller coutroi velocity.
beneficial effect
Than prior art, beneficial effect of the present invention is:
(1) the present invention, except comprising ditch body, oxygen-starved area, aerobic zone, water-in and mud inlet, also comprises anaerobic zone, and anaerobic zone, oxygen-starved area and aerobic zone one group of wastewater treatment group of end to end formation successively; The wastewater treatment group has many groups, between the wastewater treatment group, connects successively and forms A
2the O oxidation ditch, the aerobic zone of every group of wastewater treatment group is connected with the anaerobic zone of next group wastewater treatment group, and an end of the aerobic zone of last group wastewater treatment group has water outlet, can increase hydraulic detention time, the enhancement process effect, efficiently remove the nutritive substances such as nitrogen phosphorus greatly;
(2) end of the aerobic zone of last group wastewater treatment group of the present invention is connected with the anaerobic zone of first group of wastewater treatment group, if first round treatment effect is undesirable, and circular treatment again; Waste water after guaranteeing to process reaches emission standard;
(3) be provided with filler in anaerobic zone of the present invention, supplementary carbon source, adjust the waste water nutritive props, for follow-up biochemical reaction provides condition, both solved A
2under O technique anaerobic environment denitrification with release phosphorus this intrinsic shortcoming of competition to carbon source, realized again independent oxidation ditch process the irrealizable efficient removal to phosphorus;
(3) slowly-releasing carbon source---the bamboo silk that anaerobic zone of the present invention adopts, it is a kind of natural cellulose, have that specific surface area is large, porosity is high, the plurality of advantages such as bioaffinity is good, cheap, material is easy to get, reduced maintenance workload, make the present invention not only production cost and use cost low, and treatment effect is good, have engineering practice, be beneficial to promotion and application.
The accompanying drawing explanation
Fig. 1 is the floor map that the device of runoff pollution is controlled in a kind of large-scale planting industry of the present invention farmland;
Fig. 2 is the sectional schematic diagram that the device of runoff pollution is controlled in a kind of large-scale planting industry of the present invention farmland.
In figure: 1, ditch body; 2, anaerobic zone; 3, oxygen-starved area; 4, aerobic zone; 5, impeller; 6, aerating apparatus; 7, water-in; 8, mud inlet; 9, water outlet; 10, filler.
Embodiment
Below in conjunction with concrete accompanying drawing, describe the present invention.
embodiment 1
As shown in Figure 1 and Figure 2, the device of runoff pollution is controlled in a kind of large-scale planting industry farmland, comprises ditch body 1, oxygen-starved area 3, aerobic zone 4, water-in 7 and mud inlet 8, also comprises anaerobic zone 2, and described water-in 7 all is connected with ditch body 1 with mud inlet 8; Described ditch body 1 is connected with anaerobic zone 2; Described anaerobic zone 2, oxygen-starved area 3 and aerobic zone 4 be one group of wastewater treatment group of end to end formation successively; Described wastewater treatment group has the 2-5 group, and the present embodiment has preferably been selected 2 groups, and between the wastewater treatment group, series connection successively, form A
2the O oxidation ditch, the aerobic zone 4 of every group of wastewater treatment group is connected with the anaerobic zone 2 of next group wastewater treatment group, one end of the aerobic zone 4 of last group wastewater treatment group has water outlet 9, and an end of the aerobic zone 4 of last group wastewater treatment group is connected with the anaerobic zone 2 of first group of wastewater treatment group; There is impeller 53 inside, described oxygen-starved area; The degree of depth of anaerobic zone 2 equals 1.2-1.8 times of oxygen-starved area 3 degree of depth, and the present embodiment is preferably selected 1.5 times.The series connection of wastewater treatment group forms A
2the O oxidation ditch, can increase hydraulic detention time greatly, and simultaneously anaerobic zone, oxygen-starved area and aerobic zone is arranged alternately pollutents such as can efficiently removing nitrogen phosphorus.
The method of runoff pollution is controlled in a kind of large-scale planting industry farmland, the steps include:
A) waste water and pug are passed into to the anaerobic zone 2 that is placed with in advance bamboo silk filler; Slowly-releasing carbon source bamboo silk filler can discharge carbon source, for follow-up biochemical reaction provides condition;
B) waste water steps A) flows in oxygen-starved area 3 from anaerobic zone 2, controls the water volume flow rate of anaerobic zone 2, oxygen-starved area 3 and aerobic zone 4 by impeller 5; At the interior release phosphorus of anaerobic zone 1, partial organic substances is carried out ammonification simultaneously, carries out denitrogenation processing,
C) waste water after denitrogenation 3 enters aerobic zone 4 from oxygen-starved area, and the aerating apparatuss 6 in aerobic zone 4 carry out blast aeration, make the organism in aerobic degradation waste water, and nitration reaction occurs, and absorbs phosphorus simultaneously and removes BOD;
D) waste water enters in the anaerobic zone 2 of next group wastewater treatment group, if when waste water arrives the aerobic zone 4 of last group wastewater treatment group, waste water is up to standard, water after processing is discharged by water outlet 9, if below standard, waste water circulation is processed again to first group of anaerobic zone 2, and above step process circulates.
It is a tributary drainage area that the present embodiment is positioned at Jiangsu Province's Gehu lake water, and the Engineering Service object is the pollution of area source such as country sewage in basin and agricultural run-off.The pollution of area source sewage quantity of this area is large, by the open channel pipe network, is focused on.Adopt top two-stage combination A
2the O oxidation ditch is processed this agricultural run-off, and the oxidation ditch volume is 3500m
3, impeller adopts the 10KW configuration, and the flow velocity of anaerobic zone is 0.3m/s, and oxygen-starved area and aerobic zone are 0.45m/s.Influent COD is 66mg/l, ammonia nitrogen 14.5mg/l, total nitrogen 16.3mg/l, total phosphorus 0.36mg/l.After processing, water outlet COD is 8.2mg/l, ammonia nitrogen 0.7mg/l, and total nitrogen 1.0mg/l, total phosphorus 0.05mg/l, meet emission standard.
With embodiment 1, difference is that the present embodiment is based on Chinese TAI HU AREA basin, the wastewater treatment group has 5 groups, the degree of depth of anaerobic zone 2 equals 1.2 times of oxygen-starved area 3 degree of depth, step D) in waste water while arriving the aerobic zone 4 of last group wastewater treatment group waste water directly get rid of, no longer through circulation.Sewage is included in the engineering in embodiment 1 by the farmland drainage system.Sewage mainly comes from basin Nei rural area runoff and the part feces of livestock and poultry pollutes, and the oxidation ditch volume is 3500m
3, impeller adopts the 10KW configuration, and the flow velocity of anaerobic zone is 0.2m/s, and oxygen-starved area and aerobic zone are 0.24m/s.Influent COD is 142mg/l, ammonia nitrogen 27mg/l, total nitrogen 39mg/l, total phosphorus 2.25mg/l.After processing, water outlet COD is 17mg/l, ammonia nitrogen 6.2mg/l, and total nitrogen 9.0mg/l, total phosphorus 0.2mg/l, reach emission standard.
With embodiment 2, difference is: the present embodiment wastewater treatment group has 3 groups, and the degree of depth of anaerobic zone 2 equals 1.8 times of oxygen-starved area 3 degree of depth, and the flow velocity of anaerobic zone is 0.3m/s, and oxygen-starved area and aerobic zone are 0.54m/s.When step D), waste water arrives the aerobic zone 4 of last group wastewater treatment group, waste water is not directly got rid of, then passes through circular treatment once.The waste water of processing meets emission request.After processing, water outlet COD is 16mg/l, ammonia nitrogen 6.0mg/l, and total nitrogen 8.9mg/l, total phosphorus 0.2mg/l, reach emission standard.
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| CN109987702B (en) * | 2019-03-18 | 2022-01-11 | 沈阳建筑大学 | Synchronous nitrogen and phosphorus removal oxidation ditch and enhanced nitrogen removal process method thereof |
| CN109970185A (en) * | 2019-04-25 | 2019-07-05 | 河南省科学院化学研究所有限公司 | Industrial wastewater treatment method based on improved oxidation ditch and improved oxidation ditch |
| CN111747618B (en) * | 2020-08-06 | 2021-11-19 | 安徽建筑大学 | Efficient denitrification system and method based on two-stage AO oxidation ditch series connection |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6830689B2 (en) * | 2003-05-05 | 2004-12-14 | United States Filter Corporation | Process for removing phosphorus from wastewater utilizing a triple basin wastewater treatment system |
| CN101041509B (en) * | 2007-04-24 | 2010-05-19 | 上海亚同环保实业有限公司 | Circulation flow ring-shaped biological denitrification phosphorous removal technique |
| CN100572302C (en) * | 2007-12-11 | 2009-12-23 | 江苏凌志环保有限公司 | The dephosphorization denitrogenation integrated A of ORBAL oxidation ditch-related type 2The O/ inversion A 2O technology |
| CN201436288U (en) * | 2009-07-01 | 2010-04-07 | 广东省冶金建筑设计研究院 | Oxidation ditch pool type sewage treatment device |
| CN101628775B (en) * | 2009-08-09 | 2011-07-27 | 江苏鼎泽环境工程有限公司 | Improved Carrousel oxidation ditch |
| CN102531270A (en) * | 2010-12-28 | 2012-07-04 | 中国市政工程西北设计研究院有限公司 | Multi-section multi-step anaerobic-oxic (AO) biological reaction tank |
| CN102145960B (en) * | 2011-02-24 | 2012-11-14 | 江苏省环境科学研究院 | Device and method for denitrifying and dephosphorizing ecological protection multi-level filtration wall in water source area on rural land surface |
| CN102502962A (en) * | 2011-11-03 | 2012-06-20 | 安徽国祯环保节能科技股份有限公司 | Method and device for controlling synchronous nitration and denitrification in surface aeration oxidation ditch process |
| CN102583746B (en) * | 2012-03-19 | 2013-06-05 | 中国市政工程西北设计研究院有限公司天津分院 | Multi-stage anaerobic anoxic aerobic biological reaction tank |
| CN102701446A (en) * | 2012-07-03 | 2012-10-03 | 深圳市汇达力环保科技有限公司 | Elastic porous foam suspended biological filler and application thereof in sewage treatment, water environment ecological restoration, organic waste gas treatment and deodorization |
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