The process combination system of close-coupled processing micro-polluted raw and method thereof
Technical field
The present invention relates to a kind of micro-polluted raw treatment process, be specifically related to a kind of collection chemical oxidization method, Gas biological filter, contact oxidation method, biomembrance process, settlement separate method, fast filter method is in the combined process system of one process micro-polluted raw.
Background technology
The micro-pollution problem in Drinking Water in China water source in recent years becomes increasingly conspicuous, and Organic pollutants are serious, and algal bloom, ammonia nitrogen exceeds standard, and various planktonic organism grows, and common process effluent quality is difficult to reach " drinking water sanitary standard " (GB5749-2006).Therefore, how on the basis of existing technique, carrying out upgrading to tap water water factory technique, explore advanced person, efficient drinking water safety safeguards technique is water supply industry problem demanding prompt solution.
Oxidation technology adds chemical oxidizing agent in handling technology of water supply front end, relies on its oxidation capacity to decompose the structure destroying organic pollutant, thus decompose or conversion pollutant, the treatment effect of strengthening subsequent technique.At present, the oxygenant of water supply process mainly contains chlorine, ozone, dioxide peroxide, potassium permanganate, hydrogen peroxide, ferrate etc.Wherein Ozone oxidation method is widely applied in more American-European developed countries, and has become ripe.Domestic from 20 century 70s in Shanghai, Tianjin, the ground such as Beijing also carried out O in succession
3every research of oxidation style water treatment, achieves many achievements, O
3oxidation capacity strong, speed of response is fast, and raw material is easy to get, easy to use, does not produce secondary pollution.But because one-time investment is large, the factors such as current consumption is large, are not also widely used at home, but day by day increase the weight of because domestic drinking water source pollutes, make people start to pay attention to the application of ozone in polluted water process.At present, the conbined usage strengthening ozonation technique and ozone and other treatment processs is very active in water treatment field.
Beginning of the nineties late 1980s, on the basis combining traditional biological membrane process and feedwater rapid filter technique, develop third generation biomembrance process treatment process---BAF, and the advanced treatment being applied to waste water very soon, after directly apply to the two stage biological process of waste water.Its maximum feature is that collection organism oxidation degradation and suspended solids are retained in one, organics removal and SS, can realize effective denitrogenation dephosphorizing function, can according to the water quality characteristics of waste water, select suitable process form, and follow-up mud-water separation facility can be saved.Application shows: BAF has the advantages such as operation function is strong, floor space is little, good operation stability, and purification efficiency is good, also can be applicable to the process of eutrophication micropollutant water.When China's water body organic contamination is increasingly serious, in the urgent need to biologic treating technique is introduced handling technology of water supply, upgrading is carried out to existing technique, improves the supportability of water supply quality, make outlet water organic substance and ammonia nitrogen index reach water quality standard for drinking water.But owing to containing the material such as more shellfish and algae in former water, the problems such as BAF is applied in Water purification and often occurs that water distribution system filter blocks, and hardening appears in filtrate, backwashing period shortening.In the middle of sewage disposal, BAF front end is standing carries out coagulation with " grid---settling pit---settling tank---ultra-fine grid ", thus reduce BAF water inlet SS, prevent impurities in water from blocking water distribution system, extend the work period again.But in the process of micro-polluted raw, natural subsidence is bad to the treatment effect of turbidity, and when raw water turbidity is larger, BAF system easily blocks, and head loss increases very fast, and back flushing frequency increases, and energy consumption increases.If in Water purification, also increase same primary treatment processes, so not only increase floor space, nor one ensures good treatment effect surely.
Summary of the invention
For the problem that above-mentioned prior art proposes, the present invention proposes process combination system and the method thereof of close-coupled processing micro-polluted raw, mainly solve the technical problem existing for existing micro-polluted raw treatment process, realize the process of polluted water body in the mode of high efficiency, low cost.
For achieving the above object, technical scheme of the present invention is as follows:
The process combination system of close-coupled processing micro-polluted raw, comprise into water preoxidation district, machinery clarification flotation area, on, lower to stream BAF district and sand filtration filtrating area, the water inlet pipe in described water inlet preoxidation district arranges ozonize toss area, for being oxidized algae, Humus material, removal is smelt and taste, improve the coagulation performance of former water, and connect machinery clarification flotation area by water inlet pipe, mechanical stirring lifting system is provided with in described machinery clarification flotation area, for the former water of mechanical stirring, the former water of abundant mixing, and the suspended matter removed in former water, colloidal quality and organic substance, machinery clarification flotation area is connected to flowing BAF with lower by overflow weir, described lower to stream BAF district be connected with Up-flow Biological Aerated Filter district by training wall, form the circular gallery BAF of alternative expression, for increasing former water and biomembranous contact area, utilize the dual function organics removal that biological membrane biological is oxidized and filtrate retains, ammonia nitrogen, algae, smell and taste, the circular gallery BAF of described alternative expression connects sand filtration filtrating area by overflow weir, and former water is after in sand filtration filtrating area, filtrate retains filtration, and top water outlet overflow flow to rising pipe to effluent trough.
Described machinery clarification flotation area comprises the first reaction chamber, second reaction chamber, separate chamber, first reaction chamber connects water inlet pipe, in the middle of first reaction chamber, mechanical stirring lifting system is housed, bottom is provided with shore pipe, is provided with chemical feeding points bottom the second reaction chamber, separate chamber is provided with effluent overflow weir water, chemical feeding points.
Described lower comprise to stream BAF district lower to stream BAF pond body, ceramic grain filter, gravel supporting layer, filter, aeration tube, catchment water distributing pipe, catchment distribution main, to catchment water distributing area, down above gravel supporting layer in stream BAF pond body, be placed with ceramic grain filter and filter, the water distributing area of catchmenting of catchment water distributing area and the bottom on top is respectively equipped with above ceramic grain filter and below gravel supporting layer, the water distributing area of catchmenting of bottom is built with aeration tube, catchment water distributing pipe, water distributing area of catchmenting bottom the Up-flow Biological Aerated Filter district that the water distributing area of catchmenting of described bottom is adjacent with same gallery is connected by training wall.
Described Up-flow Biological Aerated Filter district comprises Up-flow Biological Aerated Filter pond body, ceramic grain filter, gravel supporting layer, filter, aeration tube, catchment water distributing pipe, catchment distribution main, to catchment water distributing area, ceramic grain filter and filter is placed with above gravel supporting layer in the body of Up-flow Biological Aerated Filter pond, the water distributing area of catchmenting of catchment water distributing area and the bottom on top is respectively equipped with above ceramic grain filter and below gravel supporting layer, the water distributing area of catchmenting of bottom is built with aeration tube, catchment water distributing pipe, the water distributing area of catchmenting on the lower top to flowing BAF district that the water distributing area of catchmenting on described top is adjacent with same gallery is connected by training wall, be connected by overflow weir to flowing BAF district with under another circular gallery.
Described sand filtration filtrating area comprises sand filtration filtering basin pond body, filtrate, gravel supporting layer, filter, aeration tube, catchment water distributing pipe, catchment distribution main, to catchment water distributing area, filtrate and filter is placed with above gravel supporting layer in the body of sand filtration filtering basin pond, the water distributing area of catchmenting of catchment water distributing area and the bottom on top is respectively equipped with above filtrate and below gravel supporting layer, the lower water distributing area of catchmenting to flowing BAF district that the water distributing area of catchmenting of bottom is adjacent with same gallery is connected by training wall, the water distributing area of catchmenting on top is connected with effluent trough and rising pipe by overflow weir, rising pipe is connected to back flushing water inlet manifold.
The filtrate of described sand filtration filtrating area is sandstone filtrate or manganese sand filtering material or modified filter material, for different raw water qualities.
Described BAF district and sand filtration filtrating area are all provided with back-purge system, back-purge system comprises back flushing water inlet manifold, back flushing water inlet pipe, back flushing inlet manifold, backwash pump, back flushing gas blower, back flushing drainage tray, back flushing water shoot, back flushing gas blower connects aeration tube by back flushing inlet manifold, aeration tube connects multiple filter and carries out continuous aeration, backwash pump connects back flushing water inlet manifold and back flushing water inlet pipe, back flushing water inlet manifold is arranged on the water distributing area being connected with back flushing water inlet pipe of catchmenting bottom the body of pond, back flushing drainage tray is separately positioned on inside the first circular gallery upper end, outside second circular gallery upper end, and be connected with back flushing water shoot.
Apply a method for the close-coupled processing micro-polluted raw of the present invention, concrete steps are:
1. adopt chemical oxidization method process
By the ozone toss area of former water by water inlet pipe in water inlet preoxidation district is arranged, after ozone oxidation, make larger molecular organics be transformed into small-molecule substance, algae, Humus material is oxidized, smells and is removed with taste, improves the coagulation performance of former water;
2. adopt settlement separate method process
Water after chemical oxidization method process enters mechanical settling section, utilize mechanical stirring, water is fully mixed, remove large particulate matter in water, and eliminate SS in water further, colloidal quality, algae, the phenomenon preventing from influent turbidity from causing greatly BAF filter blocking, slows down the increase of its head loss, extends the work period;
3. adopt Gas biological filter, contact oxidation method and biomembrance process process
Mechanical clarifier water outlet enters lower in stream BAF district through overflow weir, the lower of same gallery relies on training wall to form biological filter to stream and upward flow under the alternative expression of circular gallery type to stream BAF and Up-flow Biological Aerated Filter, Up-flow Biological Aerated Filter water outlet afterwards enters the lower to stream BAF of another circular gallery by overflow weir, through being placed in supporting layer, continuous aeration is carried out by the multiple filters on the aerated conduit of gas blower air feed, the microbial film of ceramic grain filter growth obtains sufficient dissolved oxygen, the dual function that water retains through microbial film and filtrate, remove and smell taste in water, ammonia nitrogen, organism, algae, the organism of turbidity and death,
4. adopt the process of fast filter method
Water outlet enters in sand filtration filtrating area through the lower water distributing area water conservancy diversion that catchments bottom stream BAF, through being placed in the manganese sand filtering material of sand filtration filtrating area, retain further remove in water come off organism, bacterium, virus, organic substance, and removal heavy metal material, the water after purification flow to rising pipe from effluent trough and enters clean water basin.
The invention has the beneficial effects as follows:
1) for the subject matter of micro-polluted raw: smell taste, algae reproduction, organism and ammonia nitrogen exceed standard, and the heavy metal such as iron, manganese is sudden to exceed standard.After water inlet ozone pre-oxidation, algae, Humus material is oxidized, smells and obtains certain removal with taste, and improves the coagulation performance of former water; In machinery clarification flotation area, utilize mechanical stirring, former water is fully mixed, not only remove suspended matter in water, the organic substance such as colloidal quality and algae, and prevent influent turbidity from causing greatly the phenomenon of alternative aeration biological filter filter blocking, slow down the increase of its head loss, extend the work period.
2) utilize under alternative expression to stream and Up-flow Biological Aerated Filter, former water and biomembranous contact area increase greatly, when dissolved oxygen abundance, utilize the efficient organics removal of dual function that biological membrane biological is oxidized and filtrate retains, ammonia nitrogen, algae, removes certain smelling and taste simultaneously
3) adopt manganese sand filtering material to filter, not only retained the organic substance such as organism, bacterium, virus come off in water, and iron can have been removed, the heavy metal substances such as manganese.
4) whole system collection chemical oxidization method, Gas biological filter, contact oxidation method, biomembrance process, settlement separate method, fast filter method, in integrally processing micro-polluted raw, adopts and concentrates blast aeration system, take up an area little, cost is low, energy-conservation, and purification efficiency is high, is suitable for processing micro-polluted raw.
Accompanying drawing explanation
Fig. 1 is floor map of the present invention;
Fig. 2 is along A-A sectional view in Fig. 1.
concrete embodiment
Below in conjunction with drawings and Examples, the present invention is further detailed.
As shown in Fig. 1, Fig. 2, the process combination system of close-coupled processing micro-polluted raw, comprises into water preoxidation district, machinery clarification flotation area 2, alternative aeration biological filter district and sand filtration filtrating area.It comprises water inlet pipe 1, back flushing drainage tray 3, Up-flow Biological Aerated Filter 4, lower to stream BAF 5, back flushing water shoot 7, sand filtration filtrating area 8, effluent trough 9, rising pipe 10, chemical feed pipe 11, mechanical stirring system 12, ozone toss area 13, ceramic grain filter 14, gravel supporting layer 15, aeration tube 16, catchment water distributing pipe 17, double as the filter 18 of the water distribution aeration that catchments, catchment distribution main 19, back flushing water inlet pipe 20, shore pipe 21, to catchment water distributing area 22, filtrate 23, overflow weir 24, separate chamber 25, second reaction chamber 26, first reaction chamber 27, back flushing inlet pipe 28, gas blower 29, back flushing water inlet manifold 30, backwash pump 31.
The water inlet pipe 1 in water inlet preoxidation district arranges ozonize toss area 13, for being oxidized algae, Humus material, removal is smelt and taste, improve the coagulation performance of former water, and connect machinery clarification flotation area 2 by water inlet pipe 1, mechanical stirring lifting system 12 is provided with in described machinery clarification flotation area 2, for the former water of mechanical stirring, the former water of abundant mixing, and the suspended matter removed in former water, colloidal quality and organic substance, machinery clarification flotation area 2 is connected to flowing BAF 5 with lower by overflow weir 24, described lower to stream BAF district be connected with Up-flow Biological Aerated Filter district by training wall, form the circular gallery BAF of alternative expression, for increasing former water and biomembranous contact area, utilize the dual function organics removal that biological membrane biological is oxidized and filtrate retains, ammonia nitrogen, algae, smell and taste, the circular gallery BAF of described alternative expression connects sand filtration filtrating area by overflow weir 24, and former water is after in sand filtration filtrating area, filtrate retains filtration, and top water outlet overflow flow to rising pipe 10 to effluent trough 9.
Machinery clarification flotation area comprises the first reaction chamber 27, second reaction chamber 26, separate chamber 25, first reaction chamber 27 connects water inlet pipe 1, in the middle of first reaction chamber 27, mechanical stirring lifting system 12 is housed, bottom is provided with shore pipe 21, is provided with chemical feeding points (11) bottom the second reaction chamber, separate chamber 25 is provided with effluent overflow weir water 24, chemical feeding points 11.
Lower comprise to stream BAF district lower to stream BAF pond body 5, ceramic grain filter 14, gravel supporting layer 15, filter 18, aeration tube 16, catchment water distributing pipe 17, catchment distribution main 19, to catchment water distributing area 22, down above gravel supporting layer 15 in stream BAF pond body 5, be placed with ceramic grain filter 14 and filter 18, the water distributing area 22 of catchmenting of catchment water distributing area 22 and the bottom on top is respectively equipped with above ceramic grain filter 14 and below gravel supporting layer 15, the water distributing area 22 of catchmenting of bottom is built with aeration tube 16, catchment water distributing pipe 17, water distributing area 22 of catchmenting bottom the Up-flow Biological Aerated Filter district 4 that the water distributing area 22 of catchmenting of described bottom is adjacent with same gallery is connected by training wall.
Up-flow Biological Aerated Filter district comprises Up-flow Biological Aerated Filter pond body 4, ceramic grain filter 14, gravel supporting layer 15, filter 18, aeration tube 16, catchment water distributing pipe 17, catchment distribution main 19, to catchment water distributing area 22, in Up-flow Biological Aerated Filter pond body 4, gravel supporting layer 15 is placed with ceramic grain filter 14 and filter 18 above, the water distributing area 22 of catchmenting of catchment water distributing area 22 and the bottom on top is respectively equipped with above ceramic grain filter 14 and below gravel supporting layer 15, the water distributing area 22 of catchmenting of bottom is built with aeration tube 16, catchment water distributing pipe 17, the water distributing area 22 of catchmenting on the lower top to flowing BAF district 5 that the water distributing area 22 of catchmenting on described top is adjacent with same gallery is connected by training wall, be connected by overflow weir 24 to flowing BAF district 5 with under another circular gallery.
Sand filtration filtrating area comprises sand filtration filtering basin pond body 8, filtrate 23, gravel supporting layer 15, filter 18, aeration tube 16, catchment water distributing pipe 17, catchment distribution main 19, to catchment water distributing area 22, in sand filtration filtering basin pond body 8, gravel supporting layer 15 is placed with filtrate 23 and filter 18 above, the water distributing area 22 of catchmenting of catchment water distributing area 22 and the bottom on top is respectively equipped with above filtrate 23 and below gravel supporting layer 15, the lower water distributing area 22 of catchmenting to flowing BAF district that the water distributing area 22 of catchmenting of bottom is adjacent with same gallery is connected by training wall, the water distributing area 22 of catchmenting on top is connected with effluent trough 9 and rising pipe 10 by overflow weir 24, rising pipe 10 is connected to back flushing water inlet manifold 30.
The filtrate of sand filtration filtrating area is sandstone filtrate or manganese sand filtering material or modified filter material, for different raw water qualities.
BAF district and sand filtration filtrating area are all provided with back-purge system, back-purge system comprises back flushing water inlet manifold 30, back flushing water inlet pipe 20, back flushing inlet manifold 28, backwash pump 31, back flushing gas blower 29, back flushing drainage tray 3, back flushing water shoot 7, back flushing gas blower 29 connects aeration tube 16 by back flushing inlet manifold 28, aeration tube 16 connects multiple filter and carries out continuous aeration, backwash pump 31 connects back flushing water inlet manifold 30 and back flushing water inlet pipe 20, back flushing water inlet manifold 30 is arranged on the water distributing area 22 being connected with back flushing water inlet pipe 20 of catchmenting bottom the body of pond, back flushing drainage tray 3 is separately positioned on inside the first circular gallery upper end, outside second circular gallery upper end, and be connected with back flushing water shoot 7.
The method of the close-coupled processing micro-polluted raw of application the present invention: in water inlet preoxidation district, water inlet pipe is provided with ozone toss area, former water is after ozone oxidation, larger molecular organics is transformed into small-molecule substance, algae, Humus material is oxidized, smells and obtains certain removal with taste, and improves the coagulation performance of former water, after entering mechanical settling section, utilize mechanical stirring, former water is fully mixed, not removing only large particulate matter in former water, and eliminate SS in water further, colloidal quality, the materials such as algae, the phenomenon preventing from influent turbidity from causing greatly BAF filter blocking, slow down the increase of its head loss, extends the work period, mechanical clarifier water outlet enters lower in stream BAF district through overflow weir, the lower of same gallery relies on training wall to define biological filter to stream and upward flow under the alternative expression of circular gallery type to stream BAF and Up-flow Biological Aerated Filter, Up-flow Biological Aerated Filter water outlet afterwards enters the lower to stream BAF of another circular gallery by overflow weir, through being placed in supporting layer, continuous aeration is carried out by the multiple filters on the aerated conduit of gas blower air feed, the microbial film of ceramic grain filter growth obtains sufficient dissolved oxygen, the dual function that water retains through microbial film and filtrate, remove and smell taste in water, ammonia nitrogen, organism, algae, the organism of turbidity and death, water outlet enters in sand filtration filtrating area through the lower water distributing area water conservancy diversion that catchments bottom stream BAF, through being placed in the manganese sand filtering material of sand filtration filtrating area, not only retain the organic substance such as organism, bacterium, virus removed and come off in water further, and iron can be removed, the heavy metal substances such as manganese.Water after purification flow to rising pipe from effluent trough and enters clean water basin, and whole technique completes.
Be former water with earth's surface, Shandong reservoir water, the effect of this combined system process micro-polluted raw be described: raw water turbidity 22.5NTU; Smell with taste obvious; COD
mn5.84mg/L; Ammonia nitrogen 1.45mg/L; Algae number 280
10
4 l
-1; Mn content 0.336mg/L, through this system, after ozone pre-oxidation, dosing coagulant fully reacts in accelerator, flocculation, sedimentation, after separation under alternative expression to stream Up-flow Biological Aerated Filter, after manganese sand filter filters, delivery turbidity 0.05NTU, COD
mn1.23mg/L; Ammonia nitrogen 0.12mg/L; Algae number 8
10
4 l
-1; Mn content is less than 0.01mg/L, odorless and taste.Conventional water-quality guideline and characteristic contamination index all reach " drinking water sanitary standard " (GB5749-2006), effluent quality is better than conventional water treatment process water outlet, this system is to former water organism, ammonia nitrogen exceeds standard, iron, manganese etc. is total, and metal is sudden exceeds standard, and algae, smells the treatment effects such as taste obvious, and system footprint is little, cost is low.