CN103058368B - Reactor integrating sludge reduction by using water earthworms and synchronous degradation of organic pollutants and method - Google Patents
Reactor integrating sludge reduction by using water earthworms and synchronous degradation of organic pollutants and method Download PDFInfo
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- CN103058368B CN103058368B CN201210518818.3A CN201210518818A CN103058368B CN 103058368 B CN103058368 B CN 103058368B CN 201210518818 A CN201210518818 A CN 201210518818A CN 103058368 B CN103058368 B CN 103058368B
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Abstract
The invention discloses a reactor integrating sludge reduction by using water earthworms and synchronous degradation of organic pollutants and a method. A reaction area, an aeration system and a settling area compose a cube container with open mouth, wherein a right side of the reaction area is provided with the settling area, and a lower part of the reaction area is provided with the aeration system which comprises an upper row of the aeration system and a lower row of the aeration system, with airflow of the upper row of the aeration system being upward and airflow of the lower row of the aeration system being downward. The reaction area 1 is internally provided with elastic combination fill materials which is inoculated with and densely cultured with the water earthworms. An upper right side of the reaction area is provided with a decanter. An upper right side of the settling area is provided with a water outlet weir, a lower part of the settling area is precipitated with the sludge, and bottom of the settle area is provided with a sludge discharging pipe and a sludge returning pipe which is connected with the bottom of the reaction area through a sludge returning pump. The reactor combines a mobile bio-film reactor and the water earthworms, and thus realizes synchronous sludge reduction and pollutant removal through ingestion of the water earthworms and microbial degradation of organic pollutants.
Description
Technical field
The invention belongs to environmental technology field, relate in particular to a kind of Limnodrilus hoffmeisteri mud decrement organic pollutant synchronously degrade integrated reactor and method thereof.Be specially synchronously the degrade integrated reactor exploitation of Limnodrilus hoffmeisteri mud decrement organic pollutant, utilize the ingest principle of mud of microbiological deterioration organism and Limnodrilus hoffmeisteri, when realizing mud decrement, realize the efficient removal of C in sewage, N, P.
Background technology
Along with further developing of economy, the quantity of sewage work also progressively increases, and the output of excess sludge grows with each passing day, and it is processed handling problems and receives much concern.By physics mode and chemical mode, process excess sludge, energy consumption is large and can bring secondary pollution, has the problem of economy and environment two aspects.The technology of utilizing microfauna to carry out mud decrement is to realize the green technology that process in mud source, is the most economical feasible method that current excess sludge problem solves.Ratsak etc. have carried out the technical study of two stage bioreactor and mud decrement the earliest, and second segment is as predation reactor, and the carbon that discovery enters in predation reactor has 22%-43% to generate CO through mineralization
2, the output of excess sludge is not only than few 12%-43% of reaction period.Lee etc. are the predation reactor for treatment synthetic sewage as subordinate phase with microbial film, and the sludge yield of acquisition is 0.05-0.17gSS/gCOD, than reduce about 30%-50% by traditional method.Ghyoot etc. and Wei Yuan such as send at the usefulness while having compared traditional active sludge system (CAS) and membrane-biological membrane reactor system (MBR) as predation reactor for treatment synthetic sewage, find that the latter is than the former sludge yield (0.17kgSS/kgCOD) decrement successful.Wei Yuan send etc. and also to have developed a kind of independently bio-reactor that is applicable to oligochaete growth, and the existence of tubificid and growth can cause more significant mud decrement effect.The people such as Liang Peng introduce when erythema Piao body worm is studied the effect of its mud decrement and find in activated sludge reactor, when influent load <0.6 mg/ (mgd), erythema Piao body worm can occur in a large number, when SRT is 15～34d, the long term growth of erythema Piao body worm is not affected; Under different SRT conditions, the relative decrement value of mud is 39%～58%.The people such as Rensink find when a kind of improved water treatment system of research, on plastic carrier, self-sow has tubificid, fairy maiden worm and erythema Piao body worm, because the existence of worm makes sludge yield be reduced to 0.16 kgSS/kgCOD from 0.4 kgSS/kgCOD, they also carry out load tubificid with volcanics as filler, in returned sluge system, tubificid is added to and on trickling filter, processes returned sluge, make the COD of returned sluge the inside reduce 18%-67%, 0.40 g/g that sludge yield never adds tubificid drops to 0.15 g/g, sludge volume index (SVI) drops to 45 from 90, the water separation capability of mud has also improved 27%.
Guo Mao newly waits people to apply for a kind of contact type tubificidae sludge decrement reactor and application, Limnodrilus hoffmeisteri-microorganism symbiotic system muddy degradation batch reactor and application thereof and Limnodrilus hoffmeisteri-microorganism symbiotic system muddy degradation continuous flow reactor and applied three patents, last patent equipment is independent mutually with sewage treatment process, though then two patent reactor mud decrements are synchronizeed with sewage degraded, but unrealized reaction zone and settling region are integrated, and the filler that Limnodrilus hoffmeisteri adheres to designs still defectiveness, can not realize the intensive controlled cultivation of Limnodrilus hoffmeisteri.The present invention is directed to Limnodrilus hoffmeisteri mud decrement organic pollutant that this problem the proposes integrated reactor of synchronously degrading, be applied to the biochemical treatment stage of sewage treatment process, in the time of mud decrement, make water outlet C, N, P qualified discharge.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of Limnodrilus hoffmeisteri mud decrement organic pollutant synchronously degrade integrated reactor and method thereof are provided.
The Limnodrilus hoffmeisteri mud decrement organic pollutant integrated reactor of synchronously degrading forms a uncovered cubes container by reaction zone, aerating system and settling region; Right side, reaction zone is provided with settling region, bottom, reaction zone is provided with aerating system, aerating system is connected with pneumatic pump, aerating system comprises row's aerating system and lower row's aerating system, in reaction zone, apart from 12cm place, bottom, be provided with lower row's aerating system, in reaction zone, apart from 20cm place, bottom, be provided with upper aerating system, upward, lower row's aerating system air-flow down for upper row's aerating system air-flow; Elastic combined filler is established in 1 inside, reaction zone, inoculation intensive cultivation Limnodrilus hoffmeisteri on elastic combined filler, reaction zone upper right side is provided with strains hydrophone, settling region upper right side is provided with effluent weir, bottom, settling region precipitation has mud, bottom, settling region is provided with shore pipe and mud return line, and mud return line is connected with bottom, reaction zone through sludge reflux pump.
Described elastic combined filler is that diameter is the hollow out baton round of 8 centimetres, filled polyurethane foam material in hollow out baton round.Described Limnodrilus hoffmeisteri is that Huo Fu Limnodrilus and the positive tubificid of Tubificidae belongs to.
The Limnodrilus hoffmeisteri mud decrement organic pollutant integrated reacting method of synchronously degrading is:
Sewage enters reaction zone, aerating system starts aeration, make inoculation have the elastic combined filler of Limnodrilus hoffmeisteri to be suspended in sewage, the in the situation that of dissolved oxygen abundance, the Limnodrilus hoffmeisteri and the microorganism that suspend carry out the degraded of dirty water pollutant, complete and reduce aeration rate after the degraded of pollutent to aeration not, inoculation has the elastic combined filler of Limnodrilus hoffmeisteri to be sink to bottom, reaction zone, mud is also precipitated to bottom, reaction zone, Limnodrilus hoffmeisteri in elastic combined filler carries out mud and ingests, complete mud decrement process, simultaneous reactions device bottom mud carries out anti-nitration reaction; Sewage is after contaminant degradation and Limnodrilus hoffmeisteri are ingested, supernatant liquor is disposed to settling region through straining hydrophone, in settling region, sewage precipitates again, supernatant liquor directly discharges through effluent weir, a mud part after precipitation is discharged through shore pipe, make follow-up processed, another part is returned bottom, reaction zone through mud return line by sludge reflux pump, and the growth that meets Limnodrilus hoffmeisteri is required; Complete SBR one-period, cycle sequential is 12 hours, water inlet 6min, and aeration 8.6h, precipitates/ingests 3.2h, water outlet 6min.
The present invention adopts MBBR and Limnodrilus hoffmeisteri to combine, set up the three-dimensional intensive controlled cultivation high-performance bio system of Limnodrilus hoffmeisteri, utilize Limnodrilus hoffmeisteri the effect of ingesting of mud to be realized to the object of the Decomposition degradable organic pollutant of mud decrement and microorganism, realize Limnodrilus hoffmeisteri mud decrement and synchronize with sewage organic pollution materials and remove integratedly, in mud decrement, make C, the N of water outlet, P also can qualified discharge.Limnodrilus hoffmeisteri mud decrement of the present invention is synchronizeed with organic pollutant and is removed integrated reactor for the biochemical treatment stage of sewage work, for Limnodrilus hoffmeisteri sludge decrement reactor provides basis applying of Town in Zhejiang Province sludge of sewage treatment plant decrement, change our province urban wastewater treatment firm sludge treatment disposal options, reduce on a large scale the quantity discharged of sewage disposal mud.
Mud decrement index of the present invention and sewage effluent index are:
1) water outlet after processing reaches integrated wastewater discharge standard primary standard < < GB8978-1996 > >;
2) Limnodrilus hoffmeisteri mud ingestion speed: 2700mg TSS/kgwwd;
3) the sludge index SVI < 61 of reactor mixed solution;
4) MLVSS/MLSS of stabilization mud is 0.32 ± 0.04;
5) mud decrement rate: the excess sludge reduction rate 40% of municipal sewage treatment.
Accompanying drawing explanation
Fig. 1 is the Limnodrilus hoffmeisteri mud decrement organic pollutant integrated reactor structural representation of synchronously degrading;
In figure: reaction zone 1, aerating system 2, settling region 3, mud 4, elastic combined filler 5, Limnodrilus hoffmeisteri 6, effluent weir 7, strain hydrophone 8, shore pipe 9, mud return line 10.
Embodiment
As shown in Figure 1, the Limnodrilus hoffmeisteri mud decrement organic pollutant integrated reactor of synchronously degrading forms a uncovered cubes container by reaction zone 1, aerating system 2 and settling region 3; 1 right side, reaction zone is provided with settling region 3,1 bottom, reaction zone is provided with aerating system 2, aerating system 2 is connected with pneumatic pump, aerating system 2 comprises row's aerating system and lower row's aerating system, reaction zone 1 is interior is provided with lower row's aerating system apart from 12cm place, bottom, reaction zone 1 is interior is provided with upper aerating system apart from 20cm place, bottom, and upward, lower row's aerating system air-flow down for upper row's aerating system air-flow; Elastic combined filler 5 is established in 1 inside, reaction zone, inoculation intensive cultivation Limnodrilus hoffmeisteri 6 on elastic combined filler 5, reaction zone 1 upper right side is provided with strains hydrophone 8, settling region 3 upper right sides are provided with effluent weir 7, settling region 3 bottom precipitations have mud 4,3 bottoms, settling region are provided with shore pipe 9 and mud return line 10, and mud return line 10 is connected with 1 bottom, reaction zone through sludge reflux pump.
Described elastic combined filler 5 is that diameter is the hollow out baton round of 8 centimetres, filled polyurethane foam material in hollow out baton round.The Huo Fu Limnodrilus that described Limnodrilus hoffmeisteri 6 is Tubificidae and positive tubificid belong to.Through test, Limnodrilus hoffmeisteri can be attached on the polyurethane foam material of this filler inside well, and Limnodrilus hoffmeisteri can not disperse because of flow turbulence yet when aeration.Be suspended on Huo Fu Limnodrilus and the positive tubificid that the Limnodrilus hoffmeisteri on elastic combined filler is Tubificidae and belong to, proportion is close to 1, and packing ratio is 50%.
The Limnodrilus hoffmeisteri mud decrement organic pollutant integrated reacting method of synchronously degrading is:
Sewage enters reaction zone 1, aerating system 2 starts aeration, make inoculation have the elastic combined filler 5 of Limnodrilus hoffmeisteri 6 to be suspended in sewage, the in the situation that of dissolved oxygen abundance, the Limnodrilus hoffmeisteri 6 and the microorganism that suspend carry out the degraded of dirty water pollutant, complete and reduce aeration rate after the degraded of pollutent to aeration not, inoculation has the elastic combined filler 5 of Limnodrilus hoffmeisteri 6 to be sink to 1 bottom, reaction zone, mud is also precipitated to 1 bottom, reaction zone, Limnodrilus hoffmeisteri 6 in elastic combined filler 5 carries out mud and ingests, complete mud decrement process, simultaneous reactions device bottom mud carries out anti-nitration reaction; Sewage is after contaminant degradation and Limnodrilus hoffmeisteri are ingested, supernatant liquor is disposed to settling region 3 through straining hydrophone 8, in settling region, 3 interior sewage precipitate again, supernatant liquor is through effluent weir 7 discharges, mud 4 parts after precipitation are discharged through shore pipe 9, another part is returned 1 bottom, reaction zone through mud return line by sludge reflux pump, and the growth that meets Limnodrilus hoffmeisteri is required; Complete SBR(Sequencing Batch Reactor Activated Sludge Process) one-period, cycle sequential is 12 hours, water inlet 6min, aeration 8.6h, precipitates/ingests 3.2h, water outlet 6min.
Embodiment
1. the preparation of the synchronous DeR device of mud decrement organic pollutant
The synchronous DeR device of this Limnodrilus hoffmeisteri mud decrement organic pollutant is made by synthetic glass, and reactor size is 100 * 25 * 140cm, virtual height 120cm, and useful volume is 300L, reaction zone and settling region volumetric ratio are 2:1.The hollow out baton round of inner filled polyurethane foam material is established in inside, reaction zone, inoculates Limnodrilus hoffmeisteri intensive cultivation on elastic combined filler, forms cogeneration system with the microorganism in system.Bottom, reaction zone arranges two cover aerating systems, air flow line is contrary, be formed with the turbulent state that is beneficial to Limnodrilus hoffmeisteri growth and ingests, by regulating the aeration rate size of aerating system to realize rising and the sinking of the elastic combined filler that is attached with Limnodrilus hoffmeisteri, when carrier is suspended in sewage, microbiological deterioration sewage organic pollutant, when Limnodrilus hoffmeisteri carrier is sink to bottom, reaction zone, the Limnodrilus hoffmeisteri mud of ingesting, reaches the effect of decrement.Right side, reaction zone is settling region, water outlet spoil disposal and water outlet after settling region precipitates again after process reaction zone.
2. the sewage that present method is processed is from municipal sewage plant, and inlet COD concentration is 320～550mg/L, and mixing sludge liquid concentration is 2000mg/L.
3. working method
Synchronously the degrade reaction zone inoculation Limnodrilus hoffmeisteri 3kg (weight in wet base) of integrated reactor of Limnodrilus hoffmeisteri mud decrement organic pollutant, and Limnodrilus hoffmeisteri adheres on elastic combined filler and intensive cultivation.Sewage enters reaction zone by certain sequential, and controlling reactor is 1 periodic duty by 12h, and successively according to water inlet 6min, aeration 8.6h, precipitates/ingest 3.2h, water outlet 6min.Sequential circulation, the water outlet after processing enters into settling region, right side and again precipitates, and the mud part discharge system after precipitation, makes follow-up processed, and a part is back to bottom, reaction zone and ingests for Limnodrilus hoffmeisteri, and supernatant liquor is directly discharged through effluent weir.
4. mud decrement and organic pollutant degradation effect
The reactor of the present invention 133L that disposes of sewage every day, in the stabilization mud of discharge, MLVSS is 514～771mg/L, MLSS1607～2408mg/L, MLVSS/MLSS is 0.32 ± 0.04.The sludge index SVI of reactor mixed solution is less than 61.In treated water outlet, COD is less than 60 mg/L, BOD
5be less than 20 mg/L, VSS is 1.1～11.9mg/L, and TSS is 3.9～20.1mg/L, all meets < < integrated wastewater discharge standard primary standard GB8978-1996 > >.
Claims (3)
1. the Limnodrilus hoffmeisteri mud decrement organic pollutant integrated reacting method of synchronously degrading, it is characterized in that: sewage enters synchronously the degrade reaction zone (1) of integrated reactor of Limnodrilus hoffmeisteri mud decrement organic pollutant, aerating system (2) starts aeration, make inoculation have the elastic combined filler (5) of Limnodrilus hoffmeisteri (6) to be suspended in sewage, the in the situation that of dissolved oxygen abundance, the Limnodrilus hoffmeisteri (6) and the microorganism that suspend carry out the degraded of dirty water pollutant, complete and reduce aeration rate after the degraded of pollutent to aeration not, inoculation has the elastic combined filler (5) of Limnodrilus hoffmeisteri (6) to be sink to bottom, reaction zone (1), mud is also precipitated to bottom, reaction zone (1), Limnodrilus hoffmeisteri (6) in elastic combined filler (5) carries out mud and ingests, complete mud decrement process, simultaneous reactions device bottom mud carries out anti-nitration reaction, sewage is after contaminant degradation and Limnodrilus hoffmeisteri are ingested, supernatant liquor is disposed to settling region (3) through straining hydrophone (8), in settling region (3), sewage precipitates again, supernatant liquor discharges through effluent weir (7), mud after precipitation (4) part is discharged through shore pipe (9), another part is returned bottom, reaction zone (1) through mud return line by sludge reflux pump, and the growth that meets Limnodrilus hoffmeisteri is required, complete SBR one-period, cycle sequential is 12 hours, water inlet 6min, and aeration 8.6h, precipitates/ingests 3.2h, water outlet 6min, the described Limnodrilus hoffmeisteri mud decrement organic pollutant integrated reactor of synchronously degrading forms a uncovered cubes container by reaction zone (1), aerating system (2) and settling region (3), right side, reaction zone (1) is provided with settling region (3), bottom, reaction zone (1) is provided with aerating system (2), aerating system (2) is connected with pneumatic pump, aerating system (2) comprises row's aerating system and lower row's aerating system, in reaction zone (1), apart from 12cm place, bottom, be provided with lower row's aerating system, in reaction zone (1), apart from 20cm place, bottom, be provided with upper aerating system, upward, lower row's aerating system air-flow down for upper row's aerating system air-flow, elastic combined filler (5) is established in inside, reaction zone (1), the upper inoculation of elastic combined filler (5) intensive cultivation Limnodrilus hoffmeisteri (6), reaction zone (1) upper right side is provided with strains hydrophone (8), settling region (3) upper right side is provided with effluent weir (7), bottom, settling region (3) precipitation has mud (4), bottom, settling region (3) is provided with shore pipe (9) and mud return line (10), and mud return line (10) is connected with reaction zone (1) bottom through sludge reflux pump.
2. a kind of Limnodrilus hoffmeisteri mud decrement organic pollutant integrated reacting method of synchronously degrading as claimed in claim 1, it is characterized in that described elastic combined filler (5) is that diameter is the hollow out baton round of 8 centimetres, filled polyurethane foam material in hollow out baton round.
3. a kind of Limnodrilus hoffmeisteri mud decrement organic pollutant integrated reacting method of synchronously degrading as claimed in claim 1, is characterized in that Huo Fu Limnodrilus and positive tubificid that described Limnodrilus hoffmeisteri (6) is Tubificidae belong to.
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| CN105776790B (en) * | 2016-04-25 | 2019-02-22 | 哈尔滨工业大学 | A kind of microfauna sludge decrement reactor and its control method |
| CN106145356A (en) * | 2016-09-05 | 2016-11-23 | 济宁金水科技有限公司 | Integral type sewage processing means and processing method |
| CN108892340B (en) * | 2018-07-04 | 2023-04-25 | 浙江工商大学 | Double-rotation vertical tubificidae sludge reduction reactor and method thereof |
| CN109368808A (en) * | 2018-12-14 | 2019-02-22 | 南开大学 | A kind of device of deflector type fixed bed vehicle treated animal dung sewage and application |
| CN109384316A (en) * | 2018-12-14 | 2019-02-26 | 南开大学 | A kind of device of overflow-type floating ball vehicle treated animal dung sewage and application |
| CN113716683B (en) * | 2021-08-20 | 2023-05-16 | 浙江工商大学 | Tubificidae-dynamic membrane integrated reactor and sewage treatment method thereof |
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