Utility model content
Technical problem to be solved in the utility model is: provide a kind for the treatment of system for slaughterhouse wastewater treatment, overcome the defect of prior art, avoids heating waste water during winter, reduces working cost; Adopt internal-circulation anaerobic reactor to replace UASB/ acidication, reduce the floor space of system; Utilize the efficient denitrification function of A/O system, the denitrification ability of enhanced system; Collect biogas that internal-circulation anaerobic reactor produces and it is purified, generate electricity, making wastewater treatment produce obvious economic benefit.
The technical solution of the utility model is as follows:
A kind of slaughterhouse wastewater treatment system, comprise interconnection anaerobic internal circulation reactor and A/O system, anaerobic internal circulation reactor comprises reactor body and is positioned at the knockout drum above reactor body, reactor body comprises the water-in be opened in bottom reactor body, the device that the reactor water outlet being opened in reactor body top and each up and down one deck gas-liquid-solid three-phase being arranged on reactor body inside are separated.
Knockout drum connects the device of described each one deck gas-liquid-solid three-phase separation up and down by riser tube, and knockout drum is also connected with return line, and the other end of return line is positioned at reactor body and is in the below of the device that gas-liquid-solid three-phase is separated.
Described A/O system comprises A pond, O pond and second pond, is provided with submersible agitator in described A pond, and described O pond, built with micropore oxygen supply equipment, is separately installed with submersible sewage pump in described O pond and described second pond.
The reactor water outlet being opened in reactor body top is connected with described A pond.
Described slaughterhouse wastewater treatment system also comprises equalizing tank, and the water outlet of equalizing tank is connected with the water-in of anaerobic internal circulation reactor.
Described slaughterhouse wastewater treatment system also comprises marsh gas power generation equipment, and described marsh gas power generation equipment comprises the thionizer, gas holder and the biogas generator that connect successively, and described thionizer is connected with knockout drum.
Described slaughterhouse wastewater treatment system also comprises coagulative precipitation tank, and described second pond is connected with the water inlet of coagulative precipitation tank.
The utility model has following characteristics:
1, when winter operation water temperature is lower, in air flotation pool, add water purification agent, reduce the content of the pollutent in air flotation pool water outlet, reduce the load of anaerobic internal circulation reactor.Under the condition not improving wastewater temperature, anaerobic reactor also can steady running, avoids waste water and add thermogenetic high cost.
2, higher height reason efficiency, anaerobic internal circulation reactor that aspect ratio is larger, greatly reduce the floor space of system.
3, in A/O pond without the need to carrying additionally filler or membrane module, do not need timing more exchange device, the maintenance cost of system is low.
4, nitrate denitrification is nitrogen by the submersible pump in O pond by A/O, can adjust nitric efficiency by regulating the flow of submersible sewage pump.
5, the biogas that anaerobic internal circulation reactor produces generates electricity after desulfurization, gas holder and biogas generator, and can produce a large amount of electric energy, the electrical equipment being native system by electric control system is powered.
The utility model can produce obvious economic benefit while process waste water.
Embodiment
The utility model is further illustrated below in conjunction with drawings and Examples.
As shown in Figure 1, the utility model embodiment comprise connect successively fine fack canal 1, oil partiting precipitation pool 2, air flotation pool 3 and equalizing tank 4, anaerobic internal circulation reactor 5, A/O system 6, coagulative precipitation tank 7 and the marsh gas power generation equipment 8 that is connected with anaerobic internal circulation reactor 5.As shown in Figure 2, described anaerobic internal circulation reactor 5 comprises reactor body and knockout drum 5-5, and reactor body comprises device 5-2, the return line 5-3, the riser tube 5-4 that are positioned at water-in 5-1 bottom it, up and down each one deck gas-liquid-solid three-phase and are separated and is positioned at the reactor water outlet 5-6 at top.Knockout drum 5-5 is positioned at the top of reactor body, one end of riser tube 5-4 is connected with gas-liquid-solid three-phase tripping device 5-2, the other end is connected with knockout drum 5-5, and one end of return line 5-3 is positioned at the bottom of reactor body, and the other end is connected with knockout drum 5-5.As shown in Figure 3, described A/O system 6 comprises three lattice A pond 6-1, O pond 6-2 and second pond 6-3, in described A pond 6-1, submersible agitator 6-11 is housed respectively, described O pond 6-2 is built with micropore oxygen supply equipment 6-21, and the end of O pond 6-2, second pond 6-3 is all provided with submersible sewage pump 6-22.
The water outlet of equalizing tank 4 is connected with the water-in 5-1 of anaerobic internal circulation reactor 5, the reactor water outlet 5-6 of anaerobic internal circulation reactor 5 is connected with the water inlet of the A pond 6-1 of A/O system 6, and the water outlet of the second pond 6-3 of A/O system 6 is connected with the water inlet of coagulative precipitation tank 7.
Marsh gas power generation equipment 8 comprises the thionizer 8-1, gas holder 8-2 and the biogas generator 8-3 that connect successively, and described thionizer 8-1 is connected with knockout drum 5-5.
First waste water enter fine fack canal 1, and fine fack canal 1 is built with rake teeth type revolution fine fack, and then enter oil partiting precipitation pool 2 from the outlet of fine fack canal 1, skimming machine is arranged at oil partiting precipitation pool 2 top, and mud-removing bucket is arranged at bottom.Waste water enters air flotation pool 3 from the water outlet of oil partiting precipitation pool 2, is furnished with air dissolving system and skimming system in air flotation pool 3.Enter equalizing tank 4 afterwards.Submersible agitator and sewage pump are set in equalizing tank 4.
As shown in Figure 2, waste water enters from the water-in 5-1 bottom anaerobic internal circulation reactor 5, the biogas produced in reactor body is collected by the first layer gas-liquid-solid three-phase tripping device 5-2, the mixed solution of biogas, waste water is because of density difference difference, gas enters the knockout drum 5-5 on top by riser tube 5-4, waste water reenters in reactor body through return line 5-3, enters marsh gas power generation equipment 8 through the isolated biogas of knockout drum 5-5 through pipeline.Waste water in reactor body continues to rise, flow through second layer gas-liquid-solid three-phase tripping device 5-2, the biogas produced in this process is collected by second layer gas-liquid-solid three-phase tripping device 5-2 and is entered knockout drum 5-5 through riser tube 5-4, then marsh gas power generation equipment 8 is entered, waste water continues rise and flow out from the reactor water outlet 5-6 at reactor body top, and sludge settling is got back in reactor body.
Generating set 8 comprises the thionizer 8-1, gas holder 8-2 and the biogas generator that connect successively.Thionizer 8-1 is connected with the knockout drum 5-5 of anaerobic internal circulation reactor 5 by pipeline, and biogas enters thionizer 8-1 after knockout drum 5-5 is separated, and then enters gas holder 8-2, finally enters biogas generator 8-3.The electric energy that biogas generator 8-3 produces can provide electric energy for this slaughterhouse wastewater system through electrical control gear.
As shown in Figure 3, first waste water enter the A pond 6-1 of A/O system 6 from the reactor water outlet 5-6 of anaerobic internal circulation reactor 5, and A pond 6-1 is divided into three lattice, and waste water flows through successively.In three lattice A pond 6-1, submersible agitator 6-11 is housed respectively.Waste water from A pond 6-1 flow out after enter O pond 6-2, O pond 6-2 built with micropore oxygen supply equipment 6-21, oxygen supply in waste water.The end of O pond 6-2 is equipped with submersible sewage pump 6-22, and waste water is sent into the head end of A pond 6-1 from O pond 6-2 end together with mud, the nitrate of O pond 6-2 end is refluxed into A pond 6-1, becomes nitrogen, thus reach the object of denitrogenation after denitrification.By the quantity of reflux of adjustment submersible sewage pump, the efficiency of denitrogenation can be adjusted.Increase quantity of reflux, can nitric efficiency be improved; Reduce quantity of reflux, the efficiency of denitrogenation can be reduced.Waste water enters second pond 6-3 from the water outlet of O pond 6-2, and waste water after treatment enters coagulative precipitation tank 7 from the top overflow of second pond 6-3, and the mud of bottom sends into the head end of A pond 6-1 through submersible sewage pump 6-22.
Coagulative precipitation tank 7 comprises coagulation basin, coagulating basin and settling tank.Be provided with agitator in coagulation basin, coagulating basin, in coagulation basin, add water purification agent, add coagulant aids in coagulating basin, treated waste water enters settling tank through coagulation basin, coagulating basin, and finally, the clear liquid after process is discharged from the overflow of settling tank top.
In wastewater treatment process, one deck scum silica frost can be formed on the top of oil partiting precipitation pool 2, and scum silica frost, primarily of impurity compositions such as the chicken manures in waste water, can use as organic fertilizer, reduce sludge yield and the sludge treatment expense of native system after maturation process.
During summer, water temperature is higher, and air flotation pool 3 does not operationally add water purification agent, the water outlet Pollutant levels of air flotation pool 3 are higher, can improve the biogas output of anaerobic internal circulation reactor 5, and then increase generated energy, make wastewater treatment produce larger economic benefit, reduce the working cost of system.During winter, water temperature is lower, in air flotation pool 3, add water purification agent, reduces the Pollutant levels of the water outlet of air flotation pool 3, thus reduces water inlet Pollutant levels and the load of anaerobic internal circulation reactor 3, can obtain steady running effect.During summer operation, the removal efficiency of organic pollutant can reach 85%; During winter operation, the removal efficiency of organic pollutant is 55%.
The aspect ratio of anaerobic internal circulation reactor is comparatively large, and processing efficiency is 3 ~ 5 times of UASB/ hydrolysis acidification pool, and therefore its floor space is 1/10 ~ 1/5 of UASB/ hydrolysis acidification pool, greatly reduces the floor space of system.