CN101318741B - Apparatus and method for synchronous denitrification and development of sewage sludge internal carbon source of urban sewage - Google Patents
Apparatus and method for synchronous denitrification and development of sewage sludge internal carbon source of urban sewage Download PDFInfo
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- CN101318741B CN101318741B CN2008101165148A CN200810116514A CN101318741B CN 101318741 B CN101318741 B CN 101318741B CN 2008101165148 A CN2008101165148 A CN 2008101165148A CN 200810116514 A CN200810116514 A CN 200810116514A CN 101318741 B CN101318741 B CN 101318741B
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Abstract
The invention discloses a synchronous urban sewage denitrogenation and in-sludge carbon source development device and a method using the same. The device is provided with a nitration liquid raw water tank, a sludge denitrification reactor (SDR), a sedimentation tank and a sludge pool, wherein the SDR consists of a reaction chamber and a water bath heating sleeve arranged at the periphery of the reaction chamber; the sedimentation tank is provided with a central pipe and a conical baffle board; and the method making use of the device comprises the steps of starting and reaction cycle operation, etc. The synchronous urban sewage denitrogenation and in-sludge carbon source development device and the method using the same are suitable to be used in urban sewage treatment, and save carbon source along with high degree of automation, high efficiency and good effects.
Description
Technical field
The present invention relates to a kind of municipal effluent and mud biochemical processing field, the voltaile fatty acid VFA that produces with municipal sewage plant's preliminary sedimentation tank sludge hydrolytic acidifying is an internal carbon source, realize the apparatus and method of municipal effluent denitrogenation and sludge stabilizing synchronously, be applicable to the municipal effluent of low ratio of carbon to ammonium (C/N) or the biological denitrificaion and the sludge disposal of trade effluent.
Background technology
The water of China pollutes constantly aggravation, because the nitrogen phosphorus eutrophication phenomenon that excessive accumulation causes in natural water constantly breaks out, the situation of the shortage of water resources of China also is on the rise simultaneously, and water pollutes and the dual-pressure of shortage of water resources has restricted the China's economic social development.Thereby improve municipal effluent and the nitric efficiency of trade effluent and the disposal efficiency of excess sludge, be the key point of sewage disposal and regeneration.
For the municipal effluent of low C/N, it is the barrier that its nitric efficiency can't improve that organic carbon source lacks, and additional carbon can increase the expense of sewage water denitrification.Simultaneously, the task that the reasonable disposal of a large amount of mud that produce in the sewage treatment process is expense height, difficulty is big, its construction cost account for entire sewage treatment plant and build about 40% of total expenses.Thereby how to develop internal carbon source and how effectively disposing sludge be that two key issues of processing efficiency and a difficult problem that needs to be resolved hurrily improve in the municipal sewage plant.
If the organic carbon source in the municipal wastewater treatment plant preliminary sedimentation tank mud can be developed, and then, just can improve nitric efficiency, reduce the water outlet nitrogen concentration, play the dual function of efficient advanced nitrogen and sludge stabilizing as the internal carbon source of bio-denitrifying sewage.The apparatus and method of this synchronous municipal effluent denitrogenation and sludge internal carbon source exploitation have important economic and social benefits, and this technology is original technology, and market application foreground is wide.
Summary of the invention
The objective of the invention is in order to solve the problems of the technologies described above, a kind of synchronous municipal effluent denitrogenation and sludge internal carbon source development device and method are proposed, these apparatus and method are to finish the acidication and the sewage water denitrification of primary sludge in a reactor simultaneously, the i.e. voltaile fatty acid VFA that produces with the sludge hydrolytic acidifying, finish sewage water denitrification as internal carbon source, this technology has the characteristics of operation level of automation and efficient denitrification.
The objective of the invention is to be achieved through the following technical solutions:
Municipal effluent denitrogenation synchronously and sludge internal carbon source development device is characterized in that: be provided with nitrification liquid raw water box (1), sludge denitrification reactor SDR (2), settling tank (3) and sludge sump (4); Raw water box (1) is connected with the water intaking valve (2.3) of SDR (2) by intake pump (1.3), and nitrification liquid water tank (1) bottom is provided with blow-off valve (1.1), and top is provided with upflow tube (1.2); SDR (2) is made up of reaction chamber (2.14) and the heating in water bath sleeve (2.13) that is located at the reaction chamber periphery, is provided with speed governing whipping appts (2.5), pH value probe (2.6), pH value on-line controller (2.9), temperature-control device (2.7,2.10), alkali lye bottle (2.2), wet test meter (2.1) in the reaction chamber (2.14); Be provided with several stopple coupons (2.8) on reactor from top to bottom, the reaction chamber bottom is provided with Mud-intake valve (2.12), mud valve (2.15); The water-bath lower cartridge is provided with blow-off valve (2.16); Sludge denitrification reactor SDR (2) connects the pipe core (3.3) of settling tank (3) by the rising pipe (2.11) that is located at top, below pipe core, be provided with taper reflector (3.4), settling tank is provided with several sampling valves (3.2) from top to bottom, and settling tank is connected with SDR (2) by mud reverse flow valve (3.5), sludge reflux pump (3.6), mud valve (2.15); Settling tank (3) water outlet is by rising pipe (3.1) overflow.Sludge sump (4) by advance dredge pump (4.2), Mud-intake valve (2.12) is connected with sludge denitrification reactor SDR (2).
The present invention also provides a kind of method of utilizing said apparatus to carry out synchronous municipal effluent denitrogenation and sludge internal carbon source exploitation, and its feature may further comprise the steps:
1) start: will fill with tap water in the water-bath sleeve, set 35 ℃ of controlled temperature after, open electric heating system, use N0
3 --N concentration is that the municipal wastewater treatment plant nitrification liquid of 20～30mg/L is filled with the SDR reaction chamber, then the municipal wastewater treatment plant primary sludge in the sludge sump is joined in the SDR reaction chamber, and the sludge concentration MLSS after the adding is 10～15kgMLSS/m
3
2) whipping appts in the unlatching SDR reaction chamber then is continuously pumped into nitrification liquid in SDR, and the flow that pumps into should guarantee the NO in the SDR water outlet
3 --N concentration is in the scope of 0～2mg/L, promptly as SDR water outlet NO
3 -During-N＞2mg/L, the flow that reduces nitrification liquid is to guarantee water outlet NO
3 --N concentration is at 0～2mg/L;
3) pass through the variation that the on-line pH value determinator is monitored pH of mixed value among the SDR, when the pH value raises gradually and reaches peak value 8.2～8.5, when then beginning slowly to reduce, then with the mud discharging in the settling tank, again in the SDR reaction chamber, add primary sludge according to the method in the step 1), then enter next reaction time.
Know-why: bio-denitrifying sewage is by nitrated with NH
4 +-N is converted into NO
3 --N, again by denitrification with NO
3 --N is converted into nitrogen and overflows from water.At nitrated stage, NH
4 +-N is converted to NO
3 --N is by independently two differential responses finishing of bacterium of two classes, at first by NH
4 +-N oxidation bacterium is with NH
4 +-N is converted into NO
2 --N is then by NO
2 --N oxidation bacterium is with NO
2 --N is converted into NO
3 --N.The denitrification stage is with NO
3 --N is an electron acceptor(EA), and organism is as electron donor, with NO
3 --N is converted into N
2Finish biological denitrificaion.But for low C/N municipal effluent denitrogenation, can not finish denitrification completely, cause the biological denitrificaion inefficiency owing to lack organic carbon source.
In traditional anaerobic sludge digestion process, under 35 ℃ of left and right sides conditions of middle temperature, the organism in the mud at first is hydrolyzed acidifying and produces VFA, and then VFA is reached mud decrement and stable effect by methanogen utilization production methane.And the acidication of mud with produce methane respectively by the different microorganism of two classes, promptly acidication bacterium and methanogen are successively collaborative finishes.
In apparatus and method of the present invention, the VFA that the sludge hydrolytic acidifying produces is preferentially finished denitrification by denitrifying bacteria as organic carbon source, is NO
3 --N is converted into N
2Electron donor is provided, rather than is utilized by methanogen, methanogen is eliminated by denitrifying bacteria and can not be become dominant microflora in this system.Like this, in said system, finish the biological denitrificaion and the sludge stabilization of sewage synchronously, but do not needed to add organic carbon source.
Synchronous municipal effluent denitrogenation that the present invention relates to and sludge internal carbon source development approach compared with prior art have following advantage:
1) need not to add the high-efficiency biological denitrification that organic carbon source is finished sewage, solve the difficult problem that low C/N denitrogenation of waste water efficient is difficult to improve, realize the minimizing and the stabilization of mud simultaneously, can reduce the construction and the working cost of sewage water denitrification and sludge disposal by a relatively large margin;
2) mud is not by producing the organism in the methane reaction degraded mud, stablize and decrement but finish it by acidication and anti-nitration reaction, thereby speed of reaction being fast, and is strong to variation of temperature adaptability;
3) produce methane sludge digestion technology relatively with anaerobism, the excess sludge of native system dewaters easily, and the generation that is destitute of smell, and has not only reduced the dehydration expense, and has improved dehydration rate, has improved Working environment;
4) use this technology and can improve sewage water denitrification efficient, reduce the water outlet Different Nitrogen Concentration, what prevent body eutrophication has, and is beneficial to the regeneration of sewage.
Description of drawings
Fig. 1 is the structural representation of apparatus of the present invention.
Embodiment
Below in conjunction with drawings and Examples the application's patent is further described: embodiment: as shown in Figure 1, synchronous municipal effluent denitrogenation of the present invention and sludge internal carbon source development device are made up of nitrification liquid raw water box 1, sludge denitrification reactor SDR2, settling tank 3 and sludge sump 4.The useful volume of nitrification liquid raw water box is 300L.The useful volume of the reaction chamber 2.14 of SDR is 150L, and reactor size is Φ * H=50cm * 90cm, and the volume of water-bath sleeve 2.13 is 300L.The diameter D=20cm of settling tank 3, height H=50cm, the diameter D=1.5cm of pipe core 3.3.
The nitrification liquid that embodiment uses is taken from Gaobeidian City, Beijing sewage work nitrification tank, the NO of this nitrification liquid
3 --N concentration is 20～30mg/L.Primary sedimentation pond mud is taken from the preliminary sedimentation tank spoil disposal pipeline of this Sewage Plant, is typical primary sludge, the volatile sludge concentration MLVSS of this mud and the ratio of sludge concentration MLSS, i.e. MLVSS/MLSS=0.67～0.75.
Utilize the working method step of said apparatus as follows:
1) starts: will fill with tap water in the water-bath sleeve, set 35 ℃ of controlled temperature, open electric heating system.Use NO
3 --N concentration is that the municipal wastewater treatment plant nitrification liquid of 20～30mg/L is filled with the SDR reaction chamber, then the municipal wastewater treatment plant primary sludge in the sludge sump is joined in the SDR reaction chamber, and the sludge concentration MLSS after the adding is 10～15kgMLSS/m
3
2) whipping appts in the unlatching SDR reaction chamber, rotating speed is 8-16 rev/min, then is continuously pumped into nitrification liquid with peristaltic pump in the SDR reactor, the flow that pumps into should guarantee the NO in the SDR water outlet
3 --N concentration is in the scope of 0～2mg/L, promptly as SDR water outlet NO
3 -During-N＞2mg/L, the flow that reduces nitrification liquid is to guarantee water outlet NO
3 --N concentration is at 0～2mg/L;
3) pass through the variation that the on-line pH value determinator is monitored pH of mixed value among the SDR, when the pH value raises gradually and reaches peak value 8.2～8.5, when then beginning slowly to reduce, then with the mud discharging in the settling tank, then in the SDR reactor, add primary sedimentation pond mud again, then enter next reaction time.
Long run test result shows: in operating temperature is 35 ℃, and sludge concentration MLSS is 10-15Kg/m in the SDR reactor
3, nitrification liquid concentration is under the condition of 20-30mg/L, 6 months test-results of steady running shows: the NO of system's water outlet
3 --N＜2mg/L, the NO of SDR reactor
3 --N load is 2-3Kg/m
3The MLVSS/MLSS value of primary sedimentation pond mud is reduced to final value 0.35-0.39 by initial value 0.67～0.75, and the denitrifying capacity of primary sedimentation pond mud is 0.05-0.1KgN/Kg MLVSS.System has successfully realized synchronous municipal effluent denitrogenation and sludge stabilizing.
Claims (2)
1. synchronous municipal effluent denitrogenation and sludge internal carbon source development device is characterized in that: be provided with nitrification liquid raw water box (1), sludge denitrification reactor SDR (2), settling tank (3) and sludge sump (4); Raw water box (1) is connected with the water intaking valve (2.3) of SDR (2) by intake pump (1.3), and nitrification liquid water tank (1) bottom is provided with blow-off valve (1.1), and top is provided with upflow tube (1.2); SDR (2) is made up of reaction chamber (2.14) and the heating in water bath sleeve (2.13) that is located at the reaction chamber periphery, is provided with speed governing whipping appts (2.5), pH value probe (2.6), pH value on-line controller (2.9), temperature-control device (2.7,2.10), alkali lye bottle (2.2), wet test meter (2.1) in the reaction chamber (2.14); Be provided with several stopple coupons (2.8) on reactor from top to bottom, the reaction chamber bottom is provided with Mud-intake valve (2.12), mud valve (2.15); The water-bath lower cartridge is provided with blow-off valve (2.16); Sludge denitrification reactor SDR (2) connects the pipe core (3.3) of settling tank (3) by the rising pipe (2.11) that is located at top, below pipe core, be provided with taper reflector (3.4), settling tank is provided with several sampling valves (3.2) from top to bottom, and settling tank is connected with SDR (2) by mud reverse flow valve (3.5), sludge reflux pump (3.6), mud valve (2.15); Settling tank (3) water outlet is by rising pipe (3.1) overflow, sludge sump (4) by advance dredge pump (4.2), Mud-intake valve (2.12) is connected with sludge denitrification reactor SDR (2).
2. utilize the described device of claim 1 to realize the method for synchronous municipal effluent denitrogenation and sludge internal carbon source exploitation, its feature may further comprise the steps:
1) start: will fill with tap water in the water-bath sleeve, set 35 ℃ of controlled temperature after, open electric heating system, use NO
3 --N concentration is that the municipal wastewater treatment plant nitrification liquid of 20～30mg/L is filled with the SDR reaction chamber, then the municipal wastewater treatment plant primary sludge in the sludge sump is joined in the SDR reaction chamber, and the sludge concentration MLSS after the adding is 10～15kgMLSS/m
3
2) whipping appts in the unlatching SDR reaction chamber then is continuously pumped into nitrification liquid in SDR, and the flow that pumps into should guarantee the NO in the SDR water outlet
3 --N concentration is in the scope of 0～2mg/L, promptly as SDR water outlet NO
3 -During-N＞2mg/L, the flow that reduces nitrification liquid is to guarantee water outlet NO
3 --N concentration is at 0～2mg/L;
3) pass through the variation that the on-line pH value determinator is monitored pH of mixed value among the SDR, when the pH value raises gradually and reaches peak value 8.2～8.5, when then beginning slowly to reduce, then with the mud discharging in the settling tank, again in the SDR reaction chamber, add primary sludge according to the method in the step 1), then enter next reaction time.
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| CN102627351A (en) * | 2012-03-27 | 2012-08-08 | 同济大学 | Composite precipitation tank with function of sludge carbon source transformation |
| CN104163521B (en) * | 2014-07-23 | 2016-06-08 | 北京城市排水集团有限责任公司 | A kind of multilayer sleeve sedimentation waste water purifying treatment system and water purifying treating method |
| CN104891746A (en) * | 2015-06-15 | 2015-09-09 | 扬州大学 | Equipment for removing wastewater foul smell substances in grease factory |
| CN104944699B (en) * | 2015-06-15 | 2018-01-23 | 扬州大学 | A kind of minimizing technology of grease factory waste water foul odour material |
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| CN1935694A (en) * | 2006-08-30 | 2007-03-28 | 大连理工大学 | Nonwoven fabric rotating bio-disc reactor concurrently nitrifying anaerobic ammonia oxidation process |
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| CN101186417A (en) * | 2007-12-04 | 2008-05-28 | 北京工业大学 | Sewage biological denitrogenation and sludge decrement coupling bioreactor and technique thereof |
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