CN103723825A - Anaerobic ammonia oxidation/denitrification coupling treatment method for greenhouse turtle breeding wastewater - Google Patents
Anaerobic ammonia oxidation/denitrification coupling treatment method for greenhouse turtle breeding wastewater Download PDFInfo
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Abstract
本发明公开的温室甲鱼养殖废水厌氧氨氧化/反硝化耦合处理方法。首先将温室甲鱼养殖废水自然沉淀，添加亚硝酸钠，控制废水中亚硝氮和氨氮的浓度比为0.8-1.3，然后将废水从底部连续均匀泵入上流式厌氧污泥床反应器，进行厌氧氨氧化和反硝化耦合处理，维持水力停留时间为12h，反应温度为30±2℃，经气液固三相分离后从反应器上部排出。本发明方法工艺简单，运行费用低、通过厌氧氨氧化和反硝化协同作用，能实现碳氮同步高效去除，脱氮效率高，对温室甲鱼养殖废水氨氮和总氮去除率均>80%，COD去除率>50%。适应我国典型温室甲鱼养殖场养殖废水的深度处理。
The invention discloses an anaerobic ammonium oxidation/denitrification coupling treatment method for greenhouse soft-shelled turtle breeding wastewater. Firstly, the greenhouse turtle breeding wastewater is naturally precipitated, and sodium nitrite is added to control the concentration ratio of nitrite nitrogen and ammonia nitrogen in the wastewater to 0.8-1.3, and then the wastewater is continuously and uniformly pumped into the upflow anaerobic sludge bed reactor from the bottom to carry out Anaerobic ammonium oxidation and denitrification coupling treatment, maintain the hydraulic retention time of 12h, the reaction temperature is 30±2°C, and discharge from the upper part of the reactor after gas-liquid-solid three-phase separation. The method of the invention has simple process, low operating cost, synchronous and high-efficiency removal of carbon and nitrogen through the synergistic effect of anaerobic ammonium oxidation and denitrification, high denitrification efficiency, and the removal rates of ammonia nitrogen and total nitrogen in greenhouse soft-shelled turtle breeding wastewater are both >80%. COD removal rate>50%. It is suitable for advanced treatment of aquaculture wastewater in typical greenhouse turtle farms in my country.
Description
Technical field
The present invention relates to a kind of greenhouse breeding soft-shell turtle anaerobic waste water ammonia oxidation/denitrification coupled processing method, belong to environmental technology field.
Background technology
Soft-shelled turtle nourishing is abundant, contains protein, fat, calcium, iron, gelatin, Keratin sulfate and multivitamin, is rare invigorant, is the treasure of fishery products.China is the largest country of breeding soft-shell turtle in the world, raising along with China's living standards of the people, the domestic consumption to soft-shelled turtle is increasing, China joined WTO, the high-quality fishery products such as soft-shelled turtle are slowly gone abroad, the areas such as outlet South East Asia, Japan, have greatly promoted the development of breeding soft-shell turtle industry, and average growth rate per annum reaches 26%.
Since the eighties in 20th century, China starts to rise batch production high-density breeding soft-shelled turtle.High-density breeding soft-shell turtle mode, because of features such as its high efficiency, soft-shelled turtle body are grown up soon, cultivating condition is easy to control, has become the prevailing model of China's breeding soft-shell turtle industry.High-density breeding mode mainly adopts totally enclosed concrete-steel greenhouse, and cultivation density reaches 25-30/m
2.When water temperature is during higher than 20 ℃, soft-shelled turtle starts to ingest, and food ration raises and increases with water temperature.If water temperature is during lower than optimum temps, the synthetic level of soft-shelled turtle body digestive ferment is low, and feed conversion rate is low; Water temperature during higher than optimum temps, because soft-shelled turtle body activity increases, also can reduce feed conversion rate.Therefore, in order to guarantee the good growth of testudinate in greenhouse, the water temperature general control in greenhouse is at 30-32 ℃, and should keep constant as far as possible.
The main feeding of greenhouse soft-shelled turtle be take high protein fish meal as main body, and mixes the bait that the vegetable-protein cooperations such as Radix Dauci Sativae, garlic form.In soft-shelled turtle food process, directly waste rate of feed 10-20%, eats the 80-90% feed of soft-shelled turtle body, after soft-shelled turtle body transforms, has again 60-65% nitrogen phosphorus to enter sewage, and the nitrogen phosphorus that both amount in 70-85% feed will enter in breeding wastewater.At present, can only rely on regular draining to realize the clean of greenhouse, reduce the generation of contagious disease.Greenhouse breeding soft-shell turtle industry water loss is high, and it is estimated and produce 1kg soft-shelled turtle water consumption 0.4kg/ days, by the culture-cycle, be to calculate for 1 year, produce 1kg soft-shelled turtle and need about 150kg water.By the whole nation, calculate, will have every year more than 3,100 ten thousand tons of greenhouse breeding soft-shell turtle waste water to enter water body.Through field investigation, greenhouse breeding soft-shell turtle waste water is the low organic carbon waste water of typical high ammonia nitrogen, and more than 90% waste water C/N is than being all less than 4 according to statistics.According to traditional nitrated/denitrification denitrogenation is theoretical, the theoretical C/N ratio of realizing complete denitrification denitrogenation is 2.86, in conjunction with microbial growth, actual desirable value surpasses 4kg COD/kg N conventionally.Greenhouse breeding soft-shell turtle waste water C/N is than low, adopt conventional nitrated/denitrification approach denitrogenation difficulty is large, if additional carbon, operational difficulty, processing costs increases greatly, is difficult to apply in rural area.
Anammox (Anaerobic Ammonium Oxidation, being called for short Anammox) reaction is the autotrophy path for transformation of newfound a kind of nitrogen in nature and biological wastewater treatment process in recent years, refer to that anaerobic ammonia oxidation microbiological is with NO under anaerobism or anoxia condition
2 --N is electron acceptor(EA), oxidation NH
4 +-N is the bioprocess of nitrogen, and this process is without the need for machine carbon source.Denitrification process that the Anammox of take is main body is nitrated with tradition-and denitrification denitrogenation compares, can reduce 50% oxygen-supplying amount and 100% organic carbon source supply, thereby reduce by 90% processing costs, aspect low ratio of carbon to ammonium wastewater biological denitrificaion, be with a wide range of applications.At present, the treatment process that the Anammox of take is main body has been successfully applied to the processing of various wastewater, as canned fish source mill wastewater anaerobic digestive fluid, Wastewater from Pig Farm, townm refuse Landfill Leachate and pharmacy waste water etc., these techniques denitrogenate that efficiency is high, processing costs reduces greatly compared with common process.But in actual waste water, all contain certain density COD, under the environment that organism exists, denitrifying bacteria and Anammox bacterium competing reaction substrate NO
2 --N.Meanwhile, Anammox bacteria growing rate is low, be only 0.066 ± 0.01, and denitrifying bacteria growth rate is 0.3, is 4.5 times of Anammox bacterium.Add anti-nitration reaction more easily occurs than Anammox reaction on thermodynamics.Correlative study all shows, certain density COD can have a negative impact and suppress the activity of Anammox bacterium even completely Anammox bacterium.The people such as Chamchoi study discovery, surpass 300 mg L
-1cOD will stop or suppress the activity of Anammox bacterium.The people such as Molinuevo process anaerobic digestion solution with anaerobic ammonia oxidation reactor, find 237 mg L
-1cOD will suppress the activity of Anammox bacterium completely, but in processing nitrosification exiting water process, finds that full inhibition concentrations is 290 mg L
-1.The people such as Dapena-Mora study discovery, and the acetic acid of 50 mM is active by the Anammox bacterium that suppresses 70%.C/N ratio is higher than under 1 environment, and Anammox bacterium will lose the advantage with denitrifying bacteria competition substrate.Also there are some researches show, surpass 70 mg L
-1nitrite nitrogen will cause Anammox bacterium to lose competitive edge.
Greenhouse breeding soft-shell turtle waste water is low C/N ratio wastewater, adopts the treatment process that Anammox is main body to process greenhouse breeding soft-shell turtle waste water, will greatly reduce processing costs, improves breeding environment, flourish significant to greenhouse breeding soft-shell turtle industry.But in greenhouse breeding soft-shell turtle waste water, contain a certain amount of COD, surpassed the inhibition concentration to Anammox bacterium activity of bibliographical information.Therefore, need development of new greenhouse breeding soft-shell turtle waste water treatment process badly, realize carbon nitrogen simultaneous removing.
Summary of the invention
The object of this invention is to provide a kind of carbon nitrogen of can realizing and synchronously remove, greenhouse breeding soft-shell turtle anaerobic waste water ammonia oxidation/denitrification coupled processing method simple to operate, running cost is low, nitric efficiency is high.
For reaching above-mentioned purpose, technical scheme of the present invention is: greenhouse breeding soft-shell turtle anaerobic waste water ammonia oxidation/denitrification coupled processing method, comprises the steps:
1) by greenhouse breeding soft-shell turtle waste water after natural sedimentation, add Sodium Nitrite, controlling the concentration ratio of nitrite nitrogen and ammonia nitrogen in waste water is 0.8-1.3;
2) waste water is pumped into the upflow anaerobic sludge blanket reactor with gas-liquid-solid three-phase separator and heating system from bottom continuous uniform, carry out Anammox and denitrification coupling processing, maintaining hydraulic detention time is 12h, temperature of reaction is 30 ± 2 ℃, and the water after gas-liquid-solid three-phase separation is discharged from reactor top.
The reaction chamber of above-mentioned upflow anaerobic sludge blanket reactor is built-in with porous filler.Described porous filler can be bamboo charcoal or polyhedron empty ball, and its addition accounts for the 4-5% of the total useful volume of reactor.
The invention has the beneficial effects as follows:
The inventive method technique is simple, working cost is low, by Anammox and denitrification, act synergistically, can realize carbon nitrogen synchronous high-efficiency removes, nitric efficiency is high, to greenhouse breeding soft-shell turtle ammonia nitrogen in waste water and the equal >80% of nitrogen removal rate, COD clearance >50%.The advanced treatment that adapts to breeding soft-shell turtle field, China typical case greenhouse breeding wastewater.
Accompanying drawing explanation
Fig. 1 is a kind of upflow anaerobic sludge blanket reactor schematic diagram that the inventive method adopts.
In figure: 1 is reactor, 2 is porous filler, and 3 is heating jacket, and 4 is well heater, and 5 is circulation bucket, and 6 is water-in, and 7 is triphase separator, and 8 is water outlet, and 9 is air outlet.
Embodiment
Below in conjunction with specific examples, the present invention is further described.
embodiment 1:
Greenhouse breeding soft-shell turtle waste water is taken from Hangzhou, Zhejiang province city breeding soft-shell turtle company, and greenhouse breeding soft-shell turtle waste water presents sorrel, after simple dilution, and concrete physico-chemical property index: pH value 7.5-8.1, COD 176-624 mg L
-1, ammonia nitrogen 41.6-139.8 mg L
-1, total nitrogen (TN) 47.5-145.3 mg L
-1, wherein nitric nitrogen and nitrite nitrogen <2 mg L
-1, in waste water, ammonia nitrogen is the main existence form of total nitrogen.
Adopt upflow anaerobic sludge blanket reactor as shown in Figure 1, reactor useful volume is 10L, adds polyhedron empty ball filler in reactor cavity, and its addition accounts for 5% of the total useful volume of reactor.Greenhouse breeding soft-shell turtle waste water, after preliminary sedimentation, adds Sodium Nitrite, and the ratio of controlling waste water nitrite nitrogen and ammonia nitrogen concentration is 0.86.Waste water is pumped into the upflow anaerobic sludge blanket reactor that starts Anammox from bottom, maintaining hydraulic detention time is 12h, and temperature of reaction is 30 ± 2 ℃, reaction after and after gas-liquid-solid three-phase separation from the water outlet of reactor top.This example acts synergistically by Anammox and denitrification, to greenhouse breeding soft-shell turtle ammonia nitrogen in waste water clearance, is that 90.3 ± 7.1%, TN clearance is that 88.0 ± 3.5%, COD clearance is 56.5 ± 7.9%, water outlet ammonia nitrogen 0.2-32.3 mg L
-1, total nitrogen 13-48mg L
-1, COD48-252mg L
-1.Anammox and denitrification are removed contribution rate to nitrogen and are respectively 75.7-86.8% and 10.4-17.3%.
embodiment 2:
Greenhouse breeding soft-shell turtle waste water is taken from Hangzhou, Zhejiang province city breeding soft-shell turtle company, and greenhouse breeding soft-shell turtle waste water presents sorrel, after simple dilution, and concrete physico-chemical property index: pH value 7.5-8.1, COD172-620mg L
-1, ammonia nitrogen 42.9-139.8mg L
-1, total nitrogen (TN) 46.8-140.4 L
-1, wherein nitric nitrogen and nitrite nitrogen <2mg L
-1, in waste water, ammonia nitrogen is the main existence form of total nitrogen.
Adopt upflow anaerobic sludge blanket reactor as shown in Figure 1, reactor useful volume is 10L, adds bamboo-carbon filler in reactor cavity, and its addition accounts for 4% of the total useful volume of reactor.Greenhouse breeding soft-shell turtle waste water, after preliminary sedimentation, adds Sodium Nitrite, and the ratio of controlling waste water nitrite nitrogen and ammonia nitrogen concentration is 1.28.Waste water is pumped into the upflow anaerobic sludge blanket reactor that starts Anammox from bottom, maintaining hydraulic detention time is 12h, temperature of reaction is 30 ± 2 ℃, reaction after and after gas-liquid-solid three-phase separation from the water outlet of reactor top, this example acts synergistically by Anammox and denitrification, to greenhouse breeding soft-shell turtle ammonia nitrogen in waste water clearance, is that 90.1 ± 7.0%, TN clearance is 90.7 ± 1.7%, COD clearance is 56.6.3 ± 11.0%, water outlet ammonia nitrogen 0.1-31.8mg L
-1, total nitrogen 14-35mg L
-1, COD 40-300mg L
-1.Anammox and denitrification are removed contribution rate to nitrogen and are respectively 75.6-83.4% and 10.1-14.2%.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105110472A (en) * | 2015-10-13 | 2015-12-02 | 沈阳建筑大学 | Denitrification process for whole anammox and denitrification coupling process |
| CN105174448A (en) * | 2015-10-13 | 2015-12-23 | 沈阳建筑大学 | Anaerobic ammonia oxidation and denitrification coupling device and controlled operation method thereof |
| CN106882870A (en) * | 2017-03-03 | 2017-06-23 | 东华大学 | A kind of high concentration hard-degraded organic waste water processes anaerobic biological reactor |
| CN108046520A (en) * | 2017-12-13 | 2018-05-18 | 上海海洋大学 | A kind of low stimulating organism flocculation aquaculture method of low cost |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102344197A (en) * | 2011-10-18 | 2012-02-08 | 浙江大学 | Method for rapidly starting anaerobic ammonium oxidation reactor |
| CN103112948A (en) * | 2013-02-03 | 2013-05-22 | 北京工业大学 | Method for rapidly culturing autotrophic nitrogen removal granule sludge under conditions of low substrate concentration and high ascending velocity |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102344197A (en) * | 2011-10-18 | 2012-02-08 | 浙江大学 | Method for rapidly starting anaerobic ammonium oxidation reactor |
| CN103112948A (en) * | 2013-02-03 | 2013-05-22 | 北京工业大学 | Method for rapidly culturing autotrophic nitrogen removal granule sludge under conditions of low substrate concentration and high ascending velocity |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105110472A (en) * | 2015-10-13 | 2015-12-02 | 沈阳建筑大学 | Denitrification process for whole anammox and denitrification coupling process |
| CN105174448A (en) * | 2015-10-13 | 2015-12-23 | 沈阳建筑大学 | Anaerobic ammonia oxidation and denitrification coupling device and controlled operation method thereof |
| CN106882870A (en) * | 2017-03-03 | 2017-06-23 | 东华大学 | A kind of high concentration hard-degraded organic waste water processes anaerobic biological reactor |
| CN106882870B (en) * | 2017-03-03 | 2020-05-29 | 东华大学 | Anaerobic bioreactor for treating high-concentration refractory organic wastewater |
| CN108046520A (en) * | 2017-12-13 | 2018-05-18 | 上海海洋大学 | A kind of low stimulating organism flocculation aquaculture method of low cost |
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Application publication date: 20140416 |