CN108046541A - A kind of hilly country rural domestic sewage treatment system - Google Patents

Abstract

The present invention relates to environmental technology field, especially a kind of hilly country rural domestic sewage treatment system, including collecting system, setting pot, sludge pump, water pump, diversion channel, processing unit.Sanitary sewage mixes in setting pot, precipitates, enter processing unit by water pump, diversion channel and handled, realize qualified discharge after collecting system is collected.Heavy puddle, drop weir and the bentonite impervious barrier set in processing unit can effectively avoid and be oozed under the blocking of packing layer, the generation of stink and sewage.Compared with prior art, the present invention is based on the existing irrigation canals and ditches in hilly country rural area, build antimicrobial plant joint reparation system, not only solve the qualified discharge of hilly country domestic sewage in rural areas, there is good small investment, effect, management easy to maintain, rural environments can be beautified, while can effectively reduce the stink generated in wastewater treatment process, reduce the blocking of artificial swamp, the technical advantage for the risk for reducing underground water and soil pollution.

Description

A kind of hilly country rural domestic sewage treatment system

Technical field

The present invention relates to environmental technology field more particularly to a kind of hilly country rural domestic sewage treatment systems.

Background technology

There are 9.3 hundred million to be distributed in villages and small towns in 13.3 hundred million population of China, wherein village population is about 7.63 hundred million, accounts for country's total population 57.4%, sanitary sewage annual emissions are about 9,000,000,000 tons, meanwhile, the development of technology for treating domestic sewage in rural area seriously lags, dirty Water process rate wretched insufficiency（Less than 10%）, Rural Water Pollution object discharge capacity is made persistently to remain high-order（Account for national Sewage Water Emissions More than the 50% of amount）, Ecological Environment is made to face immense pressure, there are serious systems to realizing the management goal of " ten, water " It about acts on, therefore, the processing of domestic sewage in rural areas is extremely urgent.It is different from town dweller's sanitary sewage, domestic sewage in rural areas row Put more scattered, variation water quality is big, sewage discharge period Relatively centralized（Country sewage discharge capacity is sooner or later bigger than daytime, and night is easy It stops）, since domestic sewage in rural areas is mainly fecal sewage, water for bathing, laundry water and kitchen waste water, and hardened ground rate Silt that is low, washing away and bring with rainwash, therefore domestic sewage in rural areas ingredient is mainly COD, BOD, SS, N, P, because This domestic sewage in rural areas ingredient is more single, substantially free of heavy metal and poisonous and harmful substance in water.And hilly country rural area is given birth to Sewage living in addition to the feature for possessing domestic sewage in rural areas, collect more difficult by degree of scatter higher.

The treatment process of domestic sewage in rural areas mainly has at present：1）Traditional activated sludge process, oxidation ditch process, A/O methods, A²/O Method, SBR methods, biological filter process, these techniques not only need higher water processing establishment construction cost, it is also necessary to put into bigger Fund carries out the collection of sanitary sewage, simultaneously as the water quality and quantity feature of domestic sewage in rural areas, also increases these techniques Operation expense reduces the operation stability of system.2）Simple Ecological Disposal method, typical ecological technique have Manual moist Ground, oxidation pond technique, soil permeability method, these techniques reduce sewage collecting cost and capital construction cost to a certain extent, but It is that its treatment effeciency is low, poor processing effect, also, in oxidation pond technique and soil permeability method, drainage flow is poor, especially holds Stink is also easy to produce, pollution air, soil and groundwater in today of ecological environment form sternness, are not suitable for promoting and applying.With this Meanwhile we should be seen that, rural area generally possesses the irrigation canals and ditches for sewage collecting at present（Mostly cover board embedded irrigation canals and ditches or buried tube type Sewage collection system）.Therefore, China is badly in need of wanting a kind of combination country practical situation at present, and the existing basis in rural area is made full use of to set It applies, infrastructure investment is relatively low, the reliable and stable domestic sewage treatment process for the treatment of effect.

The content of the invention

The purpose of the present invention is to overcome above-mentioned technical characterstic, with reference to the topography and landform character of hilly country and existing Sewage collection system and propose a kind of hilly country rural domestic sewage treatment system, not only realize that hilly country life in the countryside is dirty The qualified discharge of water, while have the advantages that low energy consumption, capital cost is relatively low, treatment effect is stablized.

The technical proposal for solving the technical problem of the invention is：A kind of hilly country rural domestic sewage treatment system System, including collecting system, setting pot, sludge pump, water pump, diversion channel, processing unit, wherein：

Collecting system makes full use of existing irrigation canals and ditches, pipeline, is dispersed throughout life in the countryside area, takes into full account that hilly country topography and geomorphology is special Sign, using flow by gravity by rural domestic sewage collection in setting pot；Sanitary sewage realizes silt and bulky grain in setting pot Precipitation, the water quality of suspended matter mix and the stabilization of water, mixed sanitary sewage are delivered to after water pump pressurizes through diversion channel Processing unit.

The silt and larger organic matter deposited in setting pot can be used as farm manure by sludge pumped after compost fermentation, Or it directly fills.

Flashboard and flowmeter are equipped in diversion channel, flashboard is used for the adjusting of flow, and flowmeter is used to measure life in irrigation canals and ditches Flow, the flow velocity of sewage.

Processing unit is reconstructed by original irrigation canals and ditches according to physical features and obtained, and is divided into side slope area, cultivation area, heavy puddle and drop weir, edge Water (flow) direction, side slope area are symmetrically distributed in the both sides of cultivation area, heavy puddle and weir of dropping.Wherein, along cross-section of river direction, side slope Area is followed successively by water channel side slope, microorganism adhesion bag, keel from outside to inside, and microorganism adhesion bag is fixed on water channel side slope by keel On.Cultivation area is followed successively by hypothallus, bentonite impervious barrier from top to bottom, and cultivation area, heavy puddle, drop weir are set gradually, along water Flow direction periodic distribution.

The microorganism adhesion bag is sack made of permeable PP non-woven fabrics, has good water penetration, nontoxic, Suitable for attached growth of microorganisms；In microorganism adhesion bag filled with sepiolite, flyash, vermiculite, great Sha mixtures, sepiolite, The diameter of vermiculite is preferably elected as 1 ~ 2cm, and flyash, the diameter of great Sha are preferably elected as 2 ~ 5mm, sepiolite, flyash, vermiculite, big Husky mass ratio is preferably 1:2:2:3；On the one hand the filler filled in microorganism adhesion bag can play microorganism adhesion bag Simultaneously as filler possesses larger specific surface area, good growth ring is provided for the growth of microorganism for good stabilization Border, microorganism adhesion bag and its filler can be simultaneously aerobic microbiological, facultative microbe and anaerobe provide existence place, Microorganism is enable to act synergistically, effectively reduces pollutant concentration in sanitary sewage.

The keel are made of prefabricated nylon bandage and drill rod, and there is a hole at nylon bandage both ends, and with drill rod by nylon Bandage is fixed in water channel side slope.The water channel grade of side slope is no more than 60 °.

The hypothallus is followed successively by loam layer, gravel layer, haydite layer, zeolite layer, wherein Flyash Layer, earth from top to bottom Soil thickness is 10 ~ 25cm, and gravel 10 ~ 20cm of layer thickness, the diameter of gravel particle is preferably 5 ~ 6cm；Haydite layer thickness for 10 ~ 20cm, the diameter of haydite is preferably 3 ~ 5cm；Zeolite layer thickness is 8 ~ 10cm, and the diameter of zeolite granular is preferably 1 ~ 2cm；Flyash Layer Thickness is 10 ~ 15cm.In hypothallus, 5 kinds or more of wetland plant is reasonably selected according to project location and carries out companion planting, keeps four Season is evergreen, can preferentially be selected in following wetland plant：Lythrum salicariaLythrum salicaria L.；Thaliadeabata Thalia dealbata Fraser；Arundo donaxArundo donax var. versicolor；Umbrella grassCyperus alternifolius Linn. ；CattailTypha orientalis Presl；Yellow flagIris pseudacorus L.；Lotus FlowerLotus flower；CannaCanna indica L.；ReedPhragmites communis Trin；Scirpus tabernaemontaniScirpus validus Vahl；Eichhornia crassipesEichhornia crassipes.；Floating heartNymphoides peltatum(Gmel.) O.Kuntze；Water hyacinthEichhornia crassipes (Mart.) Solms.Wherein, wetland plant can effectively absorb Nitrogen P elements in sanitary sewage, and have good degradation effect to organic matter, hypothallus is not only that wetland plant provides stabilization Growth place, reduce the drift of wetland plant, while good retention effect can be played to the pollutant in sanitary sewage, it is real Existing wetland plant is to the constant absorption of organic matter in sanitary sewage and nitrogen P elements.

Bentonite in the bentonite impervious barrier is the bentonite clay particle after nature crushing, and thickness is 10 ~ 15cm.By In hilly country, flow rate of water flow is larger, and bentonite impervious barrier can effectively prevent to ooze under sanitary sewage, reduce to soil and ground The pollution of lower water, while bentonite impervious barrier has cheap, easy for construction, the characteristics of anti-seepage effect is preferable.

The heavy puddle and drop weir, the cultivation section length that centre is set is preferably 100 ~ 500m, and heavy puddle depth is preferably 80 ~ 100cm, the drop drop on weir of dropping is preferably 30 ~ 80cm, and heavy puddle and drop weir are precast member for reinforcing bar concrete, are sunk Puddle is preferably designed as inverted trapezoidal, and drop weir is preferably designed as inverted "L" shape, and to ensure the stability on drop weir, drop weir is reserved with branch Hole is supportted, and is configured with branch column fitting, pillar can be made according to irrigation canals and ditches situation by coating steel pipe.It heavy puddle can be effective The silt that removal current scour is brought further reduces the blocking risk of cultivation area hypothallus, and weir of dropping can effectively supplement Dissolved oxygen in sanitary sewage ensures stable treatment effect, while can effectively reduce sanitary sewage disposal in the process because molten The stink for solving hypoxgia and generating.

A kind of process flow of hilly country rural domestic sewage treatment system includes the following steps：

1）The collecting system in life in the countryside area is dispersed throughout by Domestic sewage collecting in setting pot；

2）Sanitary sewage realized in setting pot the precipitation of silt, water quality mixing and water stabilization, after be delivered to through water pump Diversion channel；

3）Sanitary sewage in diversion channel is adjusted through flashboard, enters processing unit after flowmeter metering；

4）Sanitary sewage is in processing unit, in aerobic microbiological, facultative microbe, anaerobe and the joint of water plant Processing is lower to realize qualified discharge.

Advantageous effect is possessed by the present invention：The present invention builds micro- life based on the existing irrigation canals and ditches in hilly country rural area Object-plant combined reparation system not only solves the qualified discharge of hilly country domestic sewage in rural areas, has small investment, effect Management good, easy to maintain can beautify the advantages of rural environments, at the same can effectively reduce generated in wastewater treatment process it is smelly Taste, the blocking for reducing artificial swamp, reduce underground water and soil pollution risk technical advantage.

Description of the drawings

Attached drawing 1 is process flow schematic diagram of the invention.

Attached drawing 2 is processing unit cross-section of river schematic diagram of the present invention.

Attached drawing 3 is heavy puddle belonging to the present invention and drop weir schematic diagram.

Attached drawing 4 is keel structure of the present invention and assembling schematic diagram.

Attached drawing 5 fixes schematic diagram for microorganism adhesion bag of the present invention.

Attached drawing 6 is matrix layer arrangement schematic diagram of the present invention.

Attached drawing 7 is the heavy puddle of the present invention and drop weir schematic diagram.

Attached drawing 8 is influence figure of the different drop height of the present invention to sanitary sewage dissolved oxygen concentration.

Attached drawing 9 is heavy influence figure of the puddle to water turbidity different in flow rate of the present invention.

Attached drawing 10 is that microbial population changes with time figure in microorganism adhesion bag of the present invention.

Specific embodiment：

1 ~ 7 couple of present invention is described below below in conjunction with the accompanying drawings.

As shown in Fig. 1 ~ 7, the present invention includes：Collecting system 1, setting pot 2, diversion channel 3, water pump 4, processing unit 5, sludge Pump 21, flashboard 31, flowmeter 32, side slope area 51, cultivation area 52, keel 53, heavy puddle 54, drop weir 55, water channel side slope 511, Microorganism adhesion bag 512, hypothallus 521, bentonite impervious barrier 522, nylon bandage 531, drill rod 532, pillar 551, loam layer 5211st, gravel layer 5212, haydite layer 5213, zeolite layer 5214, Flyash Layer 5215.

Wherein, sludge pump 21 is arranged in setting pot 2；Flashboard 31 and flowmeter 32 are installed on water conservancy diversion successively along water (flow) direction In canal 3.Processing unit 5 is made of side slope area 51, cultivation area 52, heavy puddle 54, drop weir 55, wherein, side slope area 51 is distributed in Cultivation area 52, heavy puddle 54, the both sides on weir 55 of dropping, cultivation area 52, heavy puddle 54, drop weir 55 are set gradually, along current side To periodic distribution；Wherein, microorganism adhesion bag 512 is piled up in water channel side slope 511, is fixed on water channel side slope using keel 53 511, wherein keel 53 are made of nylon bandage 531 and drill rod 532, and water channel side slope 511, microorganism adhesion bag 512, keel 53 are common With composition side slope area 51；Cultivation area 52 is made of hypothallus 521 and bentonite impervious barrier 522, wherein, hypothallus 521 is arrived from above Under be followed successively by loam layer 5211, gravel layer 5212, haydite layer 5213, zeolite layer 5214 and Flyash Layer 5215.

As shown in Fig. 1 ~ 7, domestic sewage in rural areas is after the collection of collecting system 1 into setting pot 2, in setting pot 2, life Sewage realizes the stabilization of the precipitation of silt and bulky grain suspended matter, water quality mixing and water, silt and bulky grain in setting pot 2 The precipitation of suspended matter can effectively reduce the blocking of artificial swamp, enhance artificial swamp operation stability, and water quality mixing and water are steady The fixed stable operation for being conducive to ensure artificial swamp.After setting pot 2 runs the regular hour, the silt and organic matter of deposition are through dirt Dredge pump 21 is discharged, and carries out subsequent compost or landfill disposal.The sanitary sewage being uniformly mixed in setting pot 2 then pressurizes through water pump 4 Afterwards into diversion channel 3, it is delivered to processing unit 5 and carries out microorganism-plant combined reparation, after sanitary sewage enters processing unit 5, On the one hand, microorganism adhesion bag 512 and its filler are aerobic microbiological, facultative microbe and anaerobe provide and inhabit field Institute, COD, BOD, ammonia nitrogen, P in sanitary sewage provide nutriment for the growth of microorganism, realize the pollution in sanitary sewage The Partial digestion of object since microorganism adhesion bag 512 is fixed on by keel 53 in water channel side slope 511, makes microorganism adhesion bag 512 With good stability and resistance to erosion ability；On the other hand, the water plant in cultivation area 52 utilizes root system absorption and rhizosphere The further COD, BOD reduced in waste water of decomposition of microorganism, ammonia nitrogen, the concentration of P, some of the contaminants can also be by cultivation area 52 The absorption of hypothallus 521 fix, in night low water or cutout the growth of plant nutrition is provided, realize the round-the-clock place of waste water Reason.With the extension of cultivation area 52, the pollutant in sanitary sewage by plant, microorganisms degradation, absorption and utilizes, and realizes The purification of water quality is finally reached discharge standard or irrigation water standard.On the one hand, since hilly country waterpower drop is big, agriculture Village's hardened ground rate is low, silt is easily brought during Domestic sewage collecting and in transport process, generally, due to cultivation area The presence of water plant in 52 can cause the lifting of cultivation area 52 to causing the delay of silt in sewage after longtime running, The even blocking of hypothallus 521, influences the stable operation of sewage disposal system, in the present invention, sanitary sewage is in cultivation area 52 After handling certain distance, it will enter in heavy puddle 54, heavy puddle 54 is equivalent to a small-sized sedimentation basin, can collect sewage Get off with the sediment deposition brought in transport process, meanwhile, the silt maintenance easy to clean deposited in heavy puddle 54, to water process The stable operation of system is most important.On the other hand, sanitary sewage dissolved oxygen concentration itself is just than relatively low, and sewage is in people in addition Work wetland is transported and handled for a long time, and the dissolved oxygen concentration in water further reduces, and causes hypothallus 521, water plant rhizosphere Facultative microbe and water body in aerobic microbiological death, not only reduce wastewater treatment efficiency, while water plant can be caused The death of fibrous root, the serious death for even resulting in water plant, in the present invention, sanitary sewage handles one in cultivation area 52 After segment distance, drop phenomenon occurs into drop weir 55, effectively supplements the dissolved oxygen in waste water, water treatment effect is provided, drop In low water treatment procedure caused by the effect of anaerobic bacteria, the death of root, the death of aerobic microbiological stink, reduce sewage The air pollution generated in processing procedure.Below hypothallus 521, bentonite impervious barrier 522 is equipped with, can effectively avoid life It is oozed under sewage, soil and groundwater is avoided to pollute.

As shown in Figure 1, the flow of hilly country rural domestic sewage treatment includes the following steps：

1）The collecting system 1 in life in the countryside area is dispersed throughout by Domestic sewage collecting 2 in setting pot；

2）Sanitary sewage realized in setting pot 2 precipitation of silt, water quality mixing and water stabilization, after conveyed through water pump 4 To diversion channel 3；

3）Sanitary sewage in diversion channel 3 is adjusted through flashboard 31, and flowmeter 32 enters processing unit 5 after measuring；

4）Sanitary sewage is in processing unit 5, in aerobic microbiological, facultative microbe, anaerobe and the connection of water plant It closes processing and realizes qualified discharge.

The present invention using the existing drainage ditch in hilly country rural area, in the domestic sewage in rural areas of hilly country COD, BOD, The pollutants such as ammonia nitrogen, P carry out plant-microorganism joint and repair, first, by piling up microorganism adhesion bag, structure in irrigation canals and ditches side slope The water process microenvironment that aerobic microbiological, facultative microbe and anaerobe coexist has been built, has improved microorganism to sanitary sewage Treatment effect；Secondly, by sinking puddle in cultivation area Reasonable Arrangement, avoid because hilly country because sluicing is serious, The problem of irrigation canals and ditches siltation, hypothallus block caused by face hardening ratio is low；Again, by cultivation area Reasonable Arrangement drop weir, Solve because in waste water dissolved oxygen concentration it is low caused by bad-smell problem；Finally, bentonite antiseepage is equipped with below hypothallus Layer, can effectively avoid oozed under sanitary sewage and caused by soil pollution and underground water pollution.It is an advantage of the present invention that investment Less, effect is good, management easy to maintain, can beautify rural environments, while can effectively reduce in water treatment procedure to air, soil With the pollution of underground water.

Embodiment 1：Influence of the drop height to sanitary sewage dissolved oxygen concentration

Using Urban Sewe Treatment Plant, Hanzhong City's water inlet sewage as process object, by designing different drop height, investigation is fallen When water height is 10cm, 20cm, 30cm, 40cm, 50cm, 60cm, 70cm, 80cm, 90cm, dissolved oxygen concentration before and after weir of dropping, It is found that affecting laws of the drop height to waste water dissolved oxygen concentration.

Embodiment 2：Heavy influence of the puddle to water turbidity different in flow rate

Low whipping speed is that it is 15cm that the waste water that initial haze is 260NTU, which enters equipped with depth, under the stirring condition of 1200r/s In the open channel in heavy puddle, the turbidity of waste water before and after heavy puddle is measured using transmissometer, studies heavy influence of the puddle to turbidity of wastewater, The heavy puddle of reflection is to the removal effect of silt in waste water.

Embodiment 3：Microbial population changes with time in microorganism adhesion bag

The microorganism adhesion bag of a diameter of 25cm is selected, sepiolite, the diameter of vermiculite are elected as 2cm, flyash, the diameter of great Sha Elect 3mm as, sepiolite, flyash, vermiculite, the mass ratio of great Sha are 1:2:2:3；It is immersed after pack in the sanitary sewage of flowing, It is sampled at microorganism adhesion bag center, takes filler 1g, washed with 10ml deionized waters, the liquid washed is respectively thin It is counted after cultivating 72h on bacterium, fungi and unwrapping wire bacterium culture medium.

Claims (8)

1. a kind of hilly country rural domestic sewage treatment system, including collecting system（1）, setting pot（2）, sludge pump（21）、 Water pump（4）, diversion channel（3）, processing unit（5）, which is characterized in that wherein：Collecting system（1）Make full use of existing irrigation canals and ditches, pipe Road is dispersed throughout life in the countryside area, by rural domestic sewage collection in setting pot（2）；Sanitary sewage is in setting pot（2）Middle realization mud The stabilization of husky and bulky grain suspended matter precipitation, water quality mixing and water, mixed sanitary sewage is through water pump（4）It is passed through after pressurization Diversion channel（3）It is delivered to processing unit（5）；Diversion channel（3）It is interior to be equipped with flashboard（31）And flowmeter（32）, flashboard（31）For flowing The adjusting of amount, flowmeter（32）For measuring the flow of sanitary sewage, flow velocity in irrigation canals and ditches；Processing unit（5）According to physical features by original Irrigation canals and ditches are reconstructed and obtained, and are divided into side slope area（51）, cultivation area（52）, heavy puddle（54）With drop weir（55）, along water (flow) direction, side slope Area（51）It is symmetrically distributed in cultivation area（52）, heavy puddle（54）With drop weir（55）Both sides；It is described along cross-section of river direction Side slope area（51）Water channel side slope is followed successively by from outside to inside（511）, microorganism adhesion bag（512）, keel（53）, the keel （53）By the microorganism adhesion bag（512）It is fixed on water channel side slope（511）On；The cultivation area（52）From top to bottom according to Secondary is hypothallus（521）, bentonite impervious barrier（522）；The cultivation area（52）, heavy puddle（54）, drop weir（55）Successively It sets, along water (flow) direction periodic distribution.

2. a kind of hilly country rural domestic sewage treatment system according to claim 1, it is characterised in that：Described is micro- Biological attachment bag（512）For sack made of permeable PP non-woven fabrics, the microorganism adhesion bag（512）In be filled with Hai Pao Stone, flyash, vermiculite, great Sha mixtures, sepiolite, the diameter of vermiculite are preferably elected as 1 ~ 2cm, and flyash, the diameter of great Sha are suitable It elects as 2 ~ 5mm, sepiolite, flyash, vermiculite, the mass ratio of great Sha are preferably 1:2:2:3.

3. a kind of hilly country rural domestic sewage treatment system according to claim 1, it is characterised in that：The dragon Bone（53）By prefabricated nylon bandage（531）And drill rod（532）Composition, nylon bandage（531）There is hole at both ends, and use drill rod （532）By nylon bandage（531）It is fixed on water channel side slope（511）On.

4. a kind of hilly country rural domestic sewage treatment system according to claim 1, it is characterised in that：The base Matter layer（521）Loam layer is followed successively by from top to bottom（5211）, gravel layer（5212）, haydite layer（5213）, zeolite layer（5214）, powder Soot layer（5215）, medium loam layer（5211）Thickness be 10 ~ 25cm, gravel layer（5212）10 ~ 20cm of thickness, gravel particle Diameter is preferably 5 ~ 6cm；Haydite layer（5213）Thickness is 10 ~ 20cm, and the diameter of haydite is preferably 3 ~ 5cm；Zeolite layer（5214）Thickness For 8 ~ 10cm, the diameter of zeolite granular is preferably 1 ~ 2cm；Flyash Layer（5215）Thickness is 10 ~ 15cm.

5. a kind of hilly country rural domestic sewage treatment system according to claim 1, it is characterised in that：Described is swollen The native impervious barrier of profit（522）In bentonite for nature crush after bentonite clay particle, thickness be 10 ~ 15cm.

6. a kind of hilly country rural domestic sewage treatment system according to claim 1, it is characterised in that：Described is heavy Puddle（54）For precast member for reinforcing bar concrete, inverted trapezoidal is preferably designed as, depth is preferably 80 ~ 100cm.

7. a kind of hilly country rural domestic sewage treatment system according to claim 1, it is characterised in that：Described falls Mill weir（55）For precast member for reinforcing bar concrete, inverted "L" shape is preferably designed as, drop drop is preferably 30 ~ 80cm, the drop weir （55）Supported hole is reserved with, equipped with branch column fitting.

8. a kind of hilly country rural domestic sewage treatment system according to claim 1, it is characterised in that：Sanitary sewage The flow of processing includes the following steps：

1）The collecting system in life in the countryside area is dispersed throughout by Domestic sewage collecting in setting pot（2）In；

2）Sanitary sewage is in setting pot（2）It is middle realize silt precipitation, water quality mixing and water stabilization, after through water pump（4） It is delivered to diversion channel（3）；

3）Diversion channel（3）In sanitary sewage through flashboard（31）It adjusts, flowmeter（32）Enter processing unit after metering（5）；

4）Sanitary sewage is in processing unit（5）In, in aerobic microbiological, facultative microbe, anaerobe and water plant Qualified discharge is realized under Combined Treatment.