CN103058368A - 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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- CN103058368A CN103058368A CN2012105188183A CN201210518818A CN103058368A CN 103058368 A CN103058368 A CN 103058368A CN 2012105188183 A CN2012105188183 A CN 2012105188183A CN 201210518818 A CN201210518818 A CN 201210518818A CN 103058368 A CN103058368 A CN 103058368A
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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 degrade synchronously integrated reactor and method thereof.Be specially degrade the synchronously integrated reactor exploitation of Limnodrilus hoffmeisteri mud decrement organic pollutant, utilize the ingest principle of mud of microbiological deterioration organism and Limnodrilus hoffmeisteri, realize the efficient removal of C, N, P in the sewage when realizing mud decrement.
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.Process excess sludge by physics mode and chemical mode, 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 the green technology of realizing that the mud source is processed, is the most economical feasible method that present 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 the predation reactor, and the carbon that discovery enters in the predation reactor has 22%-43% to generate CO through mineralization
2, the output of excess sludge is not only lacked 12%-43% than the reaction period.Lee etc. use microbial film as the predation reactor for treatment synthetic sewage of subordinate phase, and the sludge yield of acquisition is 0.05-0.17gSS/gCOD, than reducing about 30%-50% with traditional method.Ghyoot etc. and Wei Yuan such as send at the usefulness when 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 the oligochaete growth, and the existence of tubificid and growth can cause more significant mud decrement effect.The people such as Liang Peng introduce in activated sludge reactor when erythema Piao body worm is studied the effect of its mud decrement and find, when influent load＜0.6 mg/ (mgd), erythema Piao body worm can occur in a large number, and the long term growth on erythema Piao body worm when SRT is 15～34d does not affect; 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, self-sow has tubificid on plastic carrier, 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 come the load tubificid with volcanics as filler, in the returned sluge system, tubificid is added to trickling filter and processes returned sluge, so that the COD of returned sluge the inside reduces 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, and the water separation capability of mud has also improved 27%.
Guo Mao newly waits the 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 uses three patents, last patent equipment is independent mutually with sewage treatment process, though then two patent reactor mud decrements and sewage degraded synchronously, 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 degrading synchronously, be applied to the biochemical treatment stage of sewage treatment process, make water outlet C, N, P qualified discharge in the time of mud decrement.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of Limnodrilus hoffmeisteri mud decrement organic pollutant degrade synchronously integrated reactor and method thereof are provided.
The Limnodrilus hoffmeisteri mud decrement organic pollutant integrated reactor of degrading synchronously forms a uncovered cubes container by reaction zone, aerating system and settling region; The reaction zone right side is provided with the settling region, the reaction zone bottom is provided with aerating system, aerating system links to each other with pneumatic pump, aerating system comprises row's aerating system and lower row's aerating system, be provided with lower row's aerating system apart from bottom 12cm place in the reaction zone, is provided with upper aerating system apart from bottom 20cm place in the reaction zone, upper row's aerating system air-flow up, lower row's aerating system air-flow is down; Elastic combined filler is established in reaction zone 1 inside, inoculation and intensive cultivation Limnodrilus hoffmeisteri on the elastic combined filler, the reaction zone upper right side is provided with strains hydrophone, the settling region upper right side is provided with effluent weir, bottom, settling region precipitation has mud, the bottom, settling region is provided with shore pipe and mud return line, and mud return line links to each other with the reaction zone bottom through sludge reflux pump.
Described elastic combined filler is that diameter is 8 centimetres hollow out baton round, filled polyurethane foam material in the 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 degrading synchronously is:
Sewage enters reaction zone, aerating system begins aeration, make inoculation have the Limnodrilus hoffmeisteri elastic combined filler to be suspended in the sewage, in the situation of dissolved oxygen abundance, the Limnodrilus hoffmeisteri and the microorganism that suspend carry out the degraded of pollutent in the sewage, finish and reduce aeration rate after the degraded of pollutent to aeration not, inoculation has Limnodrilus hoffmeisteri to be sink to the reaction zone bottom, mud also is precipitated to the reaction zone bottom, Limnodrilus hoffmeisteri in the elastic combined filler carries out mud and ingests, finish the 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 the settling region through straining hydrophone, sewage precipitates again in reaction zone, supernatant liquor directly discharges through effluent weir, mud part after the precipitation is discharged through shore pipe, make follow-up processed, another part is returned the reaction zone bottom through mud return line by sludge reflux pump, and the growth of satisfying Limnodrilus hoffmeisteri is required; Finish the SBR one-period, the 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 of Limnodrilus hoffmeisteri system, utilize Limnodrilus hoffmeisteri the effect of ingesting of mud to be realized the purpose of the Decomposition degradable organic pollutant of mud decrement and microorganism, realize that the Limnodrilus hoffmeisteri mud decrement is integrated with the synchronously removal of sewage organic pollution materials, in mud decrement, make C, the N of water outlet, P also can qualified discharge.Limnodrilus hoffmeisteri mud decrement of the present invention and organic pollutant are removed the biochemical treatment stage that integrated reactor is used for sewage work synchronously, for the Limnodrilus hoffmeisteri sludge decrement reactor provides the basis applying of Town in Zhejiang Province sludge of sewage treatment plant decrement, change our province urban wastewater treatment firm ﹠ Mud mode, 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 the processing reaches integrated wastewater discharge standard primary standard " GB8978-1996 ";
2) Limnodrilus hoffmeisteri mud ingestion speed: 2700mg TSS/kgwwd;
3) the sludge index SVI of reactor mixed solution＜61;
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.
Description of drawings
Fig. 1 is the Limnodrilus hoffmeisteri mud decrement organic pollutant integrated reactor structural representation of degrading synchronously;
Among the 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 degrading synchronously forms a uncovered cubes container by reaction zone 1, aerating system 2 and settling region 3; Reaction zone 1 right side is provided with settling region 3, reaction zone 1 bottom is provided with aerating system 2, aerating system 2 links to each other with pneumatic pump, aerating system 2 comprises row's aerating system and lower row's aerating system, reaction zone 1 is interior to be provided with lower row's aerating system apart from bottom 12cm place, reaction zone 1 is interior to be provided with upper aerating system apart from bottom 20cm place, upper row's aerating system air-flow up, lower row's aerating system air-flow is down; Elastic combined filler 5 is established in reaction zone 1 inside, inoculation and intensive cultivation Limnodrilus hoffmeisteri 6 on the 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 7,3 bottoms, settling region precipitation has mud 4,3 bottoms, settling region are provided with shore pipe 9 and mud return line 10, and mud return line 10 links to each other with reaction zone 1 bottom through sludge reflux pump.
Described elastic combined filler 5 is that diameter is 8 centimetres hollow out baton round, filled polyurethane foam material in the 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.The Limnodrilus hoffmeisteri that is suspended on the elastic combined filler is Huo Fu Limnodrilus and the positive tubificid genus of Tubificidae, and proportion is close to 1, and packing ratio is 50%.
The Limnodrilus hoffmeisteri mud decrement organic pollutant integrated reacting method of degrading synchronously is:
Sewage enters reaction zone 1, aerating system 2 beginning aerations, make inoculation have Limnodrilus hoffmeisteri 6 elastic combined fillers 5 to be suspended in the sewage, in the situation of dissolved oxygen abundance, the Limnodrilus hoffmeisteri 6 and the microorganism that suspend carry out the degraded of pollutent in the sewage, finish and reduce aeration rate after the degraded of pollutent to aeration not, inoculation has Limnodrilus hoffmeisteri 6 to be sink to reaction zone 1 bottom, mud also is precipitated to reaction zone 1 bottom, Limnodrilus hoffmeisteri 6 in the elastic combined filler 5 carries out mud and ingests, finish the 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, again precipitate at reaction zone 3 interior sewage, supernatant liquor is through effluent weir 7 dischargings, mud 4 parts after the precipitation are discharged through shore pipe 9, another part is returned reaction zone 1 bottom through mud return line by sludge reflux pump, and the growth of satisfying Limnodrilus hoffmeisteri is required; Finish SBR(Sequencing Batch Reactor Activated Sludge Process) one-period, the 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 reaction zone inside, and inoculation Limnodrilus hoffmeisteri and intensive cultivation on the elastic combined filler are with the microorganism formation cogeneration system in the system.The reaction zone bottom arranges two cover aerating systems, air flow line is opposite, be formed with the turbulent state that is beneficial to the Limnodrilus hoffmeisteri growth and ingests, be attached with rising and the sinking of the elastic combined filler of Limnodrilus hoffmeisteri by the aeration rate size realization of regulating aerating system, when carrier was suspended in the sewage, microbiological deterioration sewage organic pollutant was when the Limnodrilus hoffmeisteri carrier is sink to the reaction zone bottom, the Limnodrilus hoffmeisteri mud of ingesting reaches the effect of decrement.The reaction zone right side is the settling region, water outlet spoil disposal and water outlet after the settling region precipitates again after reaction zone is processed.
2. the sewage of present method processing is from the municipal sewage plant, and inlet COD concentration is 320～550mg/L, and mixing sludge liquid concentration is 2000mg/L.
3. working method
Degrade the synchronously reaction zone inoculation Limnodrilus hoffmeisteri 3kg (weight in wet base) of integrated reactor of Limnodrilus hoffmeisteri mud decrement organic pollutant, and Limnodrilus hoffmeisteri adheres to and intensive cultivation at elastic combined filler.Sewage enters reaction zone by certain sequential, and the control reactor is 1 periodic duty by 12h, and successively according to water inlet 6min, aeration 8.6h precipitates/ingest 3.2h, water outlet 6min.The sequential circulation, the water outlet after the processing enters into the settling region, right side and again precipitates, and the mud part discharge system after the precipitation makes follow-up processed, and a part is back to the reaction zone bottom 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, MLVSS is 514～771mg/L in the stabilization mud of discharge, MLSS1607～2408mg/L, MLVSS/MLSS are 0.32 ± 0.04.The sludge index SVI of reactor mixed solution is less than 61.In the treated water outlet, COD is less than 60 mg/L, BOD
5Less 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 (4)
1. Limnodrilus hoffmeisteri mud decrement organic pollutant integrated reactor of degrading synchronously is characterized in that forming a uncovered cubes container by reaction zone (1), aerating system (2) and settling region (3); Reaction zone (1) right side is provided with settling region (3), reaction zone (1) bottom is provided with aerating system (2), aerating system (2) links to each other with pneumatic pump, aerating system (2) comprises row's aerating system and lower row's aerating system, be provided with lower row's aerating system apart from bottom 12cm place in the reaction zone (1), is provided with upper aerating system apart from bottom 20cm place in the reaction zone (1), upper row's aerating system air-flow up, lower row's aerating system air-flow is down; Elastic combined filler (5) is established in reaction zone (1) inside, the upper inoculation of elastic combined filler (5) and 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) links to each other with reaction zone (1) bottom through sludge reflux pump.
2. a kind of Limnodrilus hoffmeisteri mud decrement organic pollutant integrated reactor of degrading synchronously as claimed in claim 1, it is characterized in that described elastic combined filler (5) is that diameter is 8 centimetres hollow out baton round, filled polyurethane foam material in the hollow out baton round.
3. a kind of Limnodrilus hoffmeisteri mud decrement organic pollutant integrated reactor of degrading synchronously as claimed in claim 1 is characterized in that described Limnodrilus hoffmeisteri (6) belongs to for the Huo Fu Limnodrilus of Tubificidae and positive tubificid.
4. one kind is used as claimed in claim 1 the Limnodrilus hoffmeisteri mud decrement organic pollutant of the reactor integrated reacting method of degrading synchronously, it is characterized in that:
Sewage enters reaction zone (1), aerating system (2) beginning aeration, make inoculation have Limnodrilus hoffmeisteri (6) elastic combined filler (5) to be suspended in the sewage, in the situation of dissolved oxygen abundance, the Limnodrilus hoffmeisteri (6) and the microorganism that suspend carry out the degraded of pollutent in the sewage, finish and reduce aeration rate after the degraded of pollutent to aeration not, inoculation has Limnodrilus hoffmeisteri (6) to be sink to reaction zone (1) bottom, mud also is precipitated to reaction zone (1) bottom, Limnodrilus hoffmeisteri (6) in the elastic combined filler (5) carries out mud and ingests, finish the 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), sewage precipitates again in reaction zone (3), supernatant liquor discharges through effluent weir (7), mud after the precipitation (a 4) part is discharged through shore pipe (9), another part is returned reaction zone (1) bottom through mud return line by sludge reflux pump, and the growth of satisfying Limnodrilus hoffmeisteri is required; Finish the SBR one-period, the cycle sequential is 12 hours, water inlet 6min, and aeration 8.6h precipitates/ingests 3.2h, water outlet 6min.
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| CN108892340A (en) * | 2018-07-04 | 2018-11-27 | 浙江工商大学 | The vertical water earthworm sludge decrement reactor of double rotary vertically and its method |
| 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 |
| CN113716683A (en) * | 2021-08-20 | 2021-11-30 | 浙江工商大学 | Tubificidae-dynamic membrane integrated reactor and sewage treatment method thereof |
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| 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 |
| CN113716683A (en) * | 2021-08-20 | 2021-11-30 | 浙江工商大学 | Tubificidae-dynamic membrane integrated reactor and sewage treatment method thereof |
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