CN205528260U - Sewage treatment system - Google Patents

Abstract

The utility model discloses a sewage treatment system relates to sewage treatment technical field, including domestic sewage inlet tube and the anaerobic fermentation of mill sewage inlet tube, the domestic sewage inlet tube filters through the grid, the anaerobic fermentation of mill sewage all gets into the equalizing basin and adjusts after the coagulating basin adds adding medicament preliminary treatment sediment, electrolytic bath in getting into in proper order again, the air supporting pond, one -level ABR reaction tank, bio -contact oxidation tank, two heavy ponds, second grade ABR reaction tank, MBR membrane bioreactor, safety filter ware and receiving is strained the device and is filtered that the back is outer arranges, use multipurposely physics, the chemistry, municipal sewage is handled to biological method. The utility model discloses reliable high -efficient, rational in infrastructure, the strong adaptability of technology, operation stabilize that the expense is low, investment cost is low, easy maintenance, reduce the energy consumption, improve operating conditions, improve labor efficiency, guarantee sewage preliminary treatment effect, and then reduction sewage treatment total cost.

Description

A kind of sewage disposal system

Technical field

The utility model relates to technical field of sewage.

Background technology

Now with development and the continuous improvement of people's quality of life of urbanization, people's daily life can manufacture A large amount of sanitary sewages, will also tend to produce a large amount of industrial wastewater simultaneously in the industrial production, and thing followed environmental pollution is also got over Come the most serious.Therefore, municipal sewage treatment is the major issue that must cope with during urban development, and whether municipal sewage processes The direct relation that puts in place city dweller's work, is lived and healthy.Owing to these sewage compositions are more complicated, containing the most organic Compound, and former water is acidity, B/C=3000:25000=0.12 ＜ 0.3, COD value of waste water is higher, and this kind of wastewater disposition will be to people The living environment of class causes increasingly severe pollution.Reach such as table two it is generally required to these sewage to be carried out primary treatment purification Shown Effluent criteria, in order to postorder sewage disposal device is further carried out deep purifying.

And current existing city primary sewage disposal system generally to there is process technique imperfection, processing method single, place The shortcoming that reason cost is high, effect is bad.

Utility model content

Technical problem to be solved in the utility model is to provide a kind of rational in infrastructure, strong adaptability, stable expense The sewage disposal system that low, cost of investment is low, easy to maintenance.

For solving above-mentioned technical problem, technical solution adopted in the utility model is:

A kind of sewage disposal system, including sanitary sewage water inlet pipe and factory's anaerobic fermentation sewage water inlet pipe, sanitary sewage Water inlet pipe is connected with regulating reservoir through grid, and factory's anaerobic fermentation sewage water inlet pipe is successively through coagulating basin and sedimentation basin and regulating reservoir phase Even, sewage sequentially enter after being adjusted pond regulation Inner electrolysis pond, flotation tank, one-level ABR reaction tank, biological contact oxidation pond, two Heavy pond, two grades of ABR reaction tanks, MBR membrane bioreactor, cartridge filter and nanofiltration device filter after outer row；Sedimentation basin and two The mud of Chen Chi lower floor mud, flotation tank upper strata scum silica frost, one-level ABR reaction tank and two grades of ABR reaction tanks all enters sludge-tank；Adjust Being equipped with aerator in joint pond, Inner electrolysis pond, biological contact oxidation pond and MBR membrane bioreactor, Inner electrolysis sets Fe-C in pond Filler, the built-in biologic packing material of biological contact oxidation pond, coagulating basin, Inner electrolysis pond and flotation tank are equipped with chemicals dosing plant.

Preferably, described chemicals dosing plant all includes medicine storing drum, agitator and measuring pump, and the chemicals dosing plant of coagulating basin includes PAC chemicals dosing plant, PAM chemicals dosing plant, NaOH chemicals dosing plant, MgCL₂Chemicals dosing plant, Na₂HPO₄Chemicals dosing plant, Inner electrolysis pond Chemicals dosing plant is HCL chemicals dosing plant；In flotation tank, chemicals dosing plant is PAM chemicals dosing plant.

Preferably, it is provided with guide shell in described sedimentation basin；Inner electrolysis pond is provided with pipe-line mixer and PH detecting system.

Preferably, described flotation tank is provided with air floatation machine, and air floatation machine is connected with air compressor machine by dissolving and air accumulator, air supporting Machine is reverse-flow type pressurized dissolved air flotation machine.

Preferably, be equipped with anaerobe filler in described one-level ABR reaction tank and two grades of ABR reaction tanks, diving stirs Mix device, deflector, sludge reflux pump.

Preferably, in described biological contact oxidation pond and MBR membrane bioreactor aerator for the mixed aerator of rotation and all with First blower fan is connected.

Preferably, in described regulating reservoir is additionally provided with elevator pump and liquid level controller, regulating reservoir and Inner electrolysis pond, aerator is Boring aeration device and being all connected with the second blower fan.

Preferably, described nanofiltration device is connected with cleaning device, and the dense water of nanofiltration device enters dense pond, through coagulating sedimentation Rear water outlet enters Fenton reaction tank, and Fenton reaction tank delivery port is connected with regulating reservoir.

Preferably, described sludge-tank is connected with anaerobic pond, biogas residue dehydration equipment successively.

Use and have the beneficial effects that produced by technique scheme: by grid filtration sanitary sewage, pass through coagulating basin And factory's anaerobic fermentation sewage is pre-processed by sedimentation basin, pretreated sewage sequentially passes through regulating reservoir, Inner electrolysis pond, gas Floating pond, one-level ABR reaction tank, biological contact oxidation pond, second pond, two grades of ABR reaction tanks, MBR membrane bioreactors, ensured public security Filter and nanofiltration device be outer row after filtering, and comprehensive utilization physics, chemistry, bioanalysis come Treating Municipal Sewage, the utility model work Skill is the most efficient, rational in infrastructure, strong adaptability, stable expense is low, cost of investment is low, easy to maintenance, reduce energy consumption, improve Operating condition, raises labour efficiency, it is ensured that Preliminary sewage treatment effect, in order to reduce the totle drilling cost of sewage disposal.

Accompanying drawing explanation

Fig. 1 is the schematic flow sheet of the utility model embodiment；

In figure: 1-factory anaerobic fermentation sewage, 2-sanitary sewage water inlet pipe, 3-grid, 4-coagulating basin, 5-sedimentation basin, 6- Regulating reservoir, 7-the first blower fan, 8-Inner electrolysis pond, 9-air compressor machine, 10-air accumulator, 11-dissolving, 12-flotation tank, 13-one-level ABR reaction tank, 14-the second blower fan, 15-biological contact oxidation pond, 16-second pond, bis-grades of ABR reaction tanks of 17-, 18-MBR film Bioreactor, 19-cartridge filter, 20-nanofiltration device, 21-cleans device, and pond, the dense pond of 23-, 24-are produced in 22-nanofiltration Fenton reaction tank, 25-biogas residue dehydration equipment, 26-anaerobic pond, 27-sludge-tank.

Detailed description of the invention

With detailed description of the invention, the utility model is described in further detail below in conjunction with the accompanying drawings.

Following feature is there is through inspection municipal sewage water quality:

1, sewage composition is more complicated, and containing big weight organic compounds, and former water is acidity, it is therefore desirable to necessary pretreatment Device, removes partial organic substances and regulates pH value, then remixing other waste water, is beneficial to subsequent biochemical and processes.

2, B/C=3000:25000=0.12 ＜ 0.3 biodegradability of sewage is low, total nitrogen content 3500mg/L, total phosphorus content It is 200 mg/L, should not directly carry out biochemical treatment, containing the organic matter of certain difficult degradation, therefore will be first by these difficult degradations Compound resolves into the organic matter that little molecule is degradable.

3, higher due to COD value of waste water, suitable aerobic process should be used, be effectively improved sludge concentration and the time of staying, Save floor space.

4, according to sewage effluent quality requirement, for ensureing effluent quality, process end at waste water and consider advanced treatment system.

Municipal sewage raw water quality such as table one:

Sewage according to this water quality designs a kind of sewage disposal system as shown in Figure 1, including sanitary sewage water inlet pipe 2 With factory anaerobic fermentation sewage water inlet pipe 1, sanitary sewage water inlet pipe 2 is connected with regulating reservoir 6 through grid 3, and factory's anaerobic fermentation is dirty Water water inlet pipe 1 is connected with regulating reservoir 6 with sedimentation basin 5 through coagulating basin 4 successively, and sewage sequentially enters interior electricity after being adjusted pond 6 regulation Solve pond 8, flotation tank 12, one-level ABR reaction tank 13, biological contact oxidation pond 15, second pond 16, two grades of ABR reaction tanks 17, MBR Standard discharge after membrane bioreactor 18, cartridge filter 19 and nanofiltration device 20 filtration；Sedimentation basin 5 and second pond 16 lower floor are dirty The mud of mud, flotation tank 12 upper strata scum silica frost, one-level ABR reaction tank 13 and two grades of ABR reaction tanks 17 all enters sludge-tank 27；Regulation It is equipped with aerator in pond 6 and Inner electrolysis pond 8, in Inner electrolysis pond 8, is additionally provided with Fe-C filler；Coagulating basin 4 and Inner electrolysis pond 8 are all provided with There is chemicals dosing plant.

Wherein, described chemicals dosing plant all includes medicine storing drum, agitator and measuring pump, and the chemicals dosing plant of coagulating basin includes PAC Chemicals dosing plant, PAM chemicals dosing plant, NaOH chemicals dosing plant, MgCL₂Chemicals dosing plant, Na₂HPO₄Chemicals dosing plant, the dosing in Inner electrolysis pond Device is HCL chemicals dosing plant；

It is provided with guide shell in described sedimentation basin 5, the flocculant being added in water is stirred by guide shell, reaches mixed flow The purpose of flocculation separation.

Described regulating reservoir 6 is additionally provided with elevator pump and liquid level controller, and aerator is boring aeration device and aerator and blower fan 7 are connected.Regulating reservoir 6 carry out the regulation of water quality and the water yield all with, reduce sewage water quantity and quality as far as possible and change whole process The impact of system, to ensure subsequent processing units continuous and steady operation；Both it was possible to prevent by boring aeration device preaeration in pond Suspended material precipitation plays again and allows the waste water of water height variable concentrations obtain well uniformly mixing, it is ensured that influent quality steady Qualitative, lower the impact to subsequent cell load, carry out stripping by preaeration, reduce the pollutant load in sewage.Meanwhile, Arranging catch pit and excretory duct bottom regulating reservoir, should have the gradient not less than 0.02, slope aspect catch pit at the bottom of pond, pool wall should arrange and climb Ladder and overflow pipe.

Sewage is made to be sufficiently mixed with HCl medicament by pipe-line mixer in Inner electrolysis pond 8, online by PH detecting system Detection sewage PH value, it is ensured that sewage quality is in slant acidity environment, is removed in sewage by boring aeration device and Fe-C filler COD, improves the biodegradability of sewage.

Described flotation tank 12 is provided with air floatation machine and PAM chemicals dosing plant, and air floatation machine is by dissolving 11 and air accumulator 10 and sky Press 9 is connected, and air floatation machine is reverse-flow type pressurized dissolved air flotation machine.In flotation tank 12, sewage adds flocculation by PAM chemicals dosing plant Agent PAM, flotation tank 12 water outlet enters one-level ABR reaction tank 17, and scum silica frost enters sludge-tank 27, reaches the purpose of separation of solid and liquid.Gas It is to be passed through air in the sewage adding flocculant and make it produce substantial amounts of fine gas that float glass process purifies the cleaning principle of sewage Bubble, countless microbubbles are attached on flocculant particle, make particle entirety relative to density less than 1, make it fast according to law of buoyancy Speed is floating to the water surface, thus reaches the purpose of separation of solid and liquid.

It is equipped with anaerobe filler, submersible agitating in described one-level ABR reaction tank 17 and two grades of ABR reaction tanks 17 Device, deflector, sludge reflux pump.By big molecule in the effect degraded sewage of anaerobe in one-level ABR reaction tank 17 Pollutant, improves the biodegradability of sewage, creates conditions for later sewage aerobic biochemical treatment.

The described built-in biologic packing material of biological contact oxidation pond 15, and it is provided with the mixed aerator of rotation.In biological contact oxidation pond 15 Biologic packing material be submerged in sewage, biologic packing material covers with biomembrane, during sewage and biofilm contact, having in sewage Machine thing is by Institute of Micro-biology's absorption, oxidation Decomposition and is converted into new biomembrane.

Described MBR membrane bioreactor 18 is external MBR membrane bioreactor, this detachable membrane bioreactor handle Bioreactor is separated with membrane module, enters membrane module, in pressure effect after the mixed liquor of membrane bioreactor is intensified Penetration by liquid film in lower mixed liquor obtains system water outlet, and activated sludge is then trapped, and is back to biological respinse with concentrate In device；Its external MBR film block device main frame be applicable to multiple separate application (as filtering fermentation liquor, fruit juice filtration, external MBR, Heavy metal wastewater thereby filters, oily waste water filters), membrane flux is big, and resistance tocrocking is good, and the life-span is long；Membrane module model is 84G-I8- XLV tubular membrane.Its corollary equipment also has supply-water pump, circulating pump, cleaning pump, 800um automatic filter, spinner flowmeter, on the spot Control cabinet and rotary-brush type self-cleaning filter, filtering accuracy is 800 μm.The sewage processed through MBR membrane bioreactor 18 enters Enter MBR product pond to store.

Described nanofiltration device 20 is connected with cleaning device 21, and the dense water of nanofiltration device 20 enters dense pond 23, sinks through coagulation Behind shallow lake, water outlet enters Fenton reaction tank 24, and Fenton reaction tank 24 delivery port is connected with regulating reservoir 6；Sewage is through nanofiltration device 20 Processed entrance nanofiltration product pond 22 to store.Nanofiltration device 20 model is ESNA-LF2-LD, the pore size filter of its cartridge filter ＜ 5um, nanofiltration device 20 is the most supporting to be provided with antisludging agent dosing pump and cleans device 21.

Described sludge-tank 27 is connected with anaerobic pond 26, biogas residue dehydration equipment 25 successively.The dirt processed by anaerobic pond 26 Mud forms fertilizer again after biogas residue dehydration equipment 25 is dehydrated.Be additionally provided with in sludge-tank 27 sludge lifting pump, submersible agitator and Liquid level gauge.

The sewage treatment step utilizing above-mentioned sewage disposal system is as follows:

(1) sewage treating nature water:

A, sanitary sewage filter thick solid content through grid 3, subsequently in regulating reservoir 6；

B, factory's anaerobic fermentation sewage add medicament and pre-process:

Factory's anaerobic fermentation sewage is injected in coagulating basin 4 and add NaOH regulation sewage PH value, add MgCL₂With Na₂HPO₄Removing ammonia nitrogen in sewage, dosing coagulant PAC makes the medium and small suspended material of sewage flocculate into big suspension, throws Add flocculant PAM, to reduce SS and partial organic substances matter in waste water；

Precipitation: sewage chemicals treatment crossed is drained in sedimentation basin 5 and precipitates, the pretreated sewage in upper strata enters Entering in regulating reservoir 6 and mix, remaining mud enters in sludge-tank 27；

(2) sewage quality regulation: sewage pretreated for above two is injected in regulating reservoir 6 and carries out water quality adjustment Mixing, and carry out preaeration stripping by aerator, reduce the pollutant load in sewage；

(3) Internal Electrolysis Process for Treating sewage: be injected in the Inner electrolysis pond 8 being filled with Fe-C filler by the sewage after regulation is logical Crossing HCl chemicals dosing plant to add HCl sewage is adjusted to slant acidity, with sewage as electrolyte solution, remove COD in sewage, raising can Biochemical；

(4) air supporting method purifies sewage: sewage water outlet after electrolysis enters the flotation tank 12 equipped with air floatation machine, and in air supporting Add flocculant PAM by PAM chemicals dosing plant in pond 12, reach the purpose of separation of solid and liquid；It is anti-that flotation tank water outlet enters one-level ABR Answering pond 13, scum silica frost enters sludge-tank 27；

(5) one-level ABR anaerobic reaction: flotation tank 12 water outlet is in one-level ABR reaction tank 13, by anaerobe In effect degradation water, the pollutant of big molecule, improves the biodegradability of sewage, creates conditions for later waste water aerobic biochemical treatment, Base sludge enters sludge-tank 27；

(6) biological contact oxidization treatment sewage: the sewage processed through one-level ABR anaerobic reaction enters biological contact oxidation Changing pond 15, biologic packing material is submerged in sewage, during biologic packing material covers with biomembrane, sewage and biofilm contact, and water In organic matter by Institute of Micro-biology's absorption, oxidation Decomposition and be converted into new biomembrane, utilize biologic packing material organics removal, enter Row Ammonia Nitrification；

(7) secondary precipitation: the sewage processed through biological contact oxidation pond 15 carries out mud-water separation in second pond 16, Removing aerobic section activated sludge in waste water, in protecting follow-up anaerobic reactor, anaerobe exempts from impact, and the mud of precipitation enters Enter sludge-tank 27；

(8) two grades of ABR anaerobic reactions: the sewage after secondary precipitation enters back into two grades of ABR reaction tanks 17 to be passed through further The effect organics removal of anaerobe, carries out denitrification, the again pollutant of big molecule in degradation water, and that improves waste water can Biochemical, creates conditions for later waste water aerobic biochemical treatment；

(9) MBR membrane bioreactor 18 purifies sewage: detachable membrane bioreactor is bioreactor and membrane module Separated, enter membrane module after the mixed liquor of membrane bioreactor is intensified, the liquid in mixed liquor is saturating under pressure Crossing film and obtain system water outlet, activated sludge is then trapped, and is back in MBR bioreactor with concentrate；Utilization is immersed in Activated sludge after biological treatment and solids in membrane separation plant entrapping tank in aerobe pond；Membrane bioreactor is because of it Effective crown_interception, can retain generation cycle longer microorganism, can realize deep purification of waste water, and Simultaneous Nitrification bacterium is being Can fully breed in Tong, its nitrification effect is obvious, and providing deep phosphorous removal denitrogenation may；

(10) MBR produces water filtration: sewage water outlet after MBR membrane bioreactor 18 filters enters cartridge filter 19 and receives Filter device 20 enters nanofiltration after again filtering and produces pond 22, and last standard discharge, the dense water of nanofiltration device 20 goes out after coagulating sedimentation Water enter Fenton reaction tank 24, can the efficient oxidation organics removal, its essence is H₂O₂At Fe²⁺Catalytic action under generate tool Having the hydroxyl radical free radical (OH) of high reaction activity, OH can make it degrade with most of organic matter effects), Fenton reaction tank Water outlet flows into regulating reservoir and again purifies.

Wherein, sewage per ton consumes NaOH0.05Kg, PAC0.2 Kg, PAM0.012 Kg, HCl0.04Kg, MgCl25.2 Kg、Na₂HPO₄3 Kg, Fe-C filler 0.01 Kg, antisludging agent 0.001 Kg.

The sewage quality processed through above-mentioned sewage water treatment method reaches standard shown in following table two:

Sewage through above-mentioned preliminary treatment further enters postorder sewage disposal device and carries out advanced treating, can be big Width reduces the totle drilling cost of sewage disposal.

In sum, filter sanitary sewage by grid 3, by coagulating basin 4 and sedimentation basin 5 by factory's anaerobic fermentation sewage Pre-process, pretreated sewage sequentially pass through regulating reservoir 6, Inner electrolysis pond 8, flotation tank 12, one-level ABR reaction tank 13, Biological contact oxidation pond 15, second pond 16, two grades of ABR reaction tanks 17, MBR membrane bioreactor 18, cartridge filters 19 and receive Standard discharge after filter device 20 filtration, comprehensive utilization physics, chemistry, bioanalysis come Treating Municipal Sewage, the utility model technique The most efficient, rational in infrastructure, strong adaptability, stable expense is low, cost of investment is low, easy to maintenance, it is ensured that sewage disposal is imitated Really, reduce energy consumption, improve operating condition, raise labour efficiency, it is ensured that Preliminary sewage treatment effect, and then reduce sewage disposal Totle drilling cost.

Claims (9)

1. a sewage disposal system, it is characterised in that: include sanitary sewage water inlet pipe (2) and factory's anaerobic fermentation wastewater influent Pipe (1), sanitary sewage water inlet pipe (2) is connected with regulating reservoir (6) through grid (3), and factory's anaerobic fermentation sewage water inlet pipe (1) is successively Being connected with regulating reservoir (6) with sedimentation basin (5) through coagulating basin (4), sewage sequentially enters Inner electrolysis pond after being adjusted pond (6) regulation (8), flotation tank (12), one-level ABR reaction tank (13), biological contact oxidation pond (15), second pond (16), two grades of ABR reaction tanks (17) outer row after, MBR membrane bioreactor (18), cartridge filter (19) and nanofiltration device (20) filter；Sedimentation basin (5) and two Heavy pond (16) lower floor mud, flotation tank (12) upper strata scum silica frost, one-level ABR reaction tank (13) and the dirt of two grades of ABR reaction tanks (17) Mud all enters sludge-tank (27)；Regulating reservoir (6), Inner electrolysis pond (8), biological contact oxidation pond (15) and MBR membrane bioreactor (18) it is equipped with aerator in, in Inner electrolysis pond (8), is provided with Fe-C filler, biological contact oxidation pond (15) built-in biologic packing material, Coagulating basin (4), Inner electrolysis pond (8) and flotation tank (12) are equipped with chemicals dosing plant.

Sewage disposal system the most according to claim 1, it is characterised in that: described chemicals dosing plant all includes medicine storing drum, stirs Mix device and measuring pump, the chemicals dosing plant of coagulating basin (4) include PAC chemicals dosing plant, PAM chemicals dosing plant, NaOH chemicals dosing plant, MgCL₂Chemicals dosing plant, Na₂HPO₄Chemicals dosing plant, the chemicals dosing plant of Inner electrolysis pond (8) is HCl chemicals dosing plant；In flotation tank (12) Chemicals dosing plant is PAM chemicals dosing plant.

Sewage disposal system the most according to claim 1, it is characterised in that: described sedimentation basin is provided with guide shell in (5)；In Electrolytic cell (8) is provided with pipe-line mixer and PH detecting system.

Sewage disposal system the most according to claim 1, it is characterised in that: described flotation tank (12) is provided with air floatation machine, gas Floating machine is connected with air compressor machine (9) by dissolving (11) and air accumulator (10), and air floatation machine is reverse-flow type pressurized dissolved air flotation machine.

Sewage disposal system the most according to claim 1, it is characterised in that: described one-level ABR reaction tank (13) and two grades ABR reaction tank is equipped with anaerobe filler, submersible agitator, deflector, sludge reflux pump in (17).

Sewage disposal system the most according to claim 1, it is characterised in that: described biological contact oxidation pond (15) and MBR Membrane bioreactor (18) interior aerator for the mixed aerator of rotation and is all connected with the first blower fan (7).

Sewage disposal system the most according to claim 1, it is characterised in that: described regulating reservoir (6) be additionally provided with elevator pump and Liquid level controller, regulating reservoir (6) and Inner electrolysis pond (8) interior aerator are boring aeration device and are all connected with the second blower fan (14).

Sewage disposal system the most according to claim 1, it is characterised in that: described nanofiltration device (20) and cleaning device (21) being connected, the dense water of nanofiltration device (20) enters dense pond (23), and after coagulating sedimentation, water outlet enters Fenton reaction tank (24), Fenton reaction tank (24) delivery port is connected with regulating reservoir (6).

Sewage disposal system the most according to claim 1, it is characterised in that: described sludge-tank (27) successively with anaerobic pond (26), biogas residue dehydration equipment (25) is connected.