CN101514067B - Domestic sewage processing system with anaerobic-aerobic combined biological filter - Google Patents
Domestic sewage processing system with anaerobic-aerobic combined biological filter Download PDFInfo
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- CN101514067B CN101514067B CN2009100716913A CN200910071691A CN101514067B CN 101514067 B CN101514067 B CN 101514067B CN 2009100716913 A CN2009100716913 A CN 2009100716913A CN 200910071691 A CN200910071691 A CN 200910071691A CN 101514067 B CN101514067 B CN 101514067B
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Abstract
A domestic sewage processing system with anaerobic-aerobic combined biological filter relates to a domestic sewage processing system. The invention solves the problems of poorer effects for removing P and N, poor effluent quality, and being hard to achieve the regulated discharge standard of the existing domestic sewage processing system. A pre-processor, a biological flocculating constituent filter sedimentation tank, a BIOFOR anaerobic biological filter, a BIOFOR aeration biological filter, a back-flushing sewage pool and a clean water pond are arranged in sequence from left to right; the torque flow sand trap of the pre-processor is communicated with the water distribution pipe of the biological flocculating constituent filter sedimentation tank; the outlet channel of the biological flocculating constituent filter sedimentation tank is connected with the water distribution area of the BIOFOR anaerobic biological filter; the outlet channel of the BIOFOR anaerobic biological filter is communicated with the water distribution area of the BIOFOR aeration biological filter; the outlet channel of the BIOFOR aeration biological filter is communicated with one end of an outlet pipe. The P and N removing effects for using the invention to process the domestic sewage are good. Various indexes of the water body after being processed all can achieve the regulated discharge standard.
Description
Technical field
The present invention relates to a kind of domestic sewage processing system.
Background technology
" urban wastewater treatment firm pollutant emission standard " (GB 18918-2002) standard that China is carrying out has proposed higher requirement to taking off N except that P.And the activated sludge process in the existing municipal sewage treatment is difficult to reach this target.For this reason, must set up new Sewage Plant or existing Sewage Plant is transformed, make it to have except that P and take off the N function.Simultaneously, along with the quickening of urban development paces and the expansion of urban region, sewage treatment facility is more and more nearer from the city, have in addition build the city in.Therefore, the land use of Sewage Plant is subjected to strict restriction.Traditional sewage work will produce peculiar smell and noise inevitably, and floor space is bigger.Because above many objective demands must be sought new sewage disposal technology.Practice shows, BAF (BAF) technology is one of the most potential alternative techniques.
(biological aerated filter BAF), is the novel process of the development abroad wastewater treatment of getting up in recent years to BAF.Seat of honour BAF was gone into operation in France in 1981 in the world, was used widely in European various countries subsequently.American States such as the U.S. and Canada introduce this technology in late 1980s, and Japan, Korea S and TaiWan, China have also successively been introduced this technology.At present bigger in the world environmental protection company such as French Degremont S.A, German Fei Lipu Muller company, French OTV S.A. all promote as key product it in the whole world.In the inland of China, BAF is in the popularization stage.Its appearance is fed water the enlightenment of rapid filter and the submerged biological fixed-bed that grows up, still belong to the microbial film category, it combines the mechanisms of action such as filtration, absorption and bio-oxidation, can play the effect of common bio-aeration pool, second pond and sand filter simultaneously.Its maximum characteristics are to integrate bio-oxidation and hold back suspended solids, have saved follow-up secondary sedimentation basins, and treatment process is simplified.In addition, biological aerated filter process organism volumetric loading height, hydraulic load is big, hydraulic detention time is short, required initial cost is few, energy consumption and running cost are low, and this technology effluent quality height has certain denitrogenation simultaneously.
The structure of BAF is similar to conventional rapid filter, and the main difference part is that BAF bottom or bottom have increased aerating system.It can be divided into upward flow and following to two kinds of streams according to water (flow) direction, and early stage BAF to be adopted down to stream, as the BIOCARBON formula.Since down to the stream BAF to receive not high, the easy obstruction of dirty efficient, the cycle of operation short, therefore now adopt the upward flow modes promptly to adopt the air water concurrent more, make water distribution, gas distribution more even.Simultaneously, in the aqueous vapor uphill process, can bring the suspended contaminant that hold back the bottom into the filter tank middle and upper part, increase the water environment capacity in filter tank, prolong the work period.At present, Up-flow Biological Aerated Filter has BIOFOR, BIOSTY, and COLOX, various ways such as BIOTUR, wherein the BIOFOR formula is most widely used.
Though BAF technology has good denitrogenation dephosphorizing effect, but nowadays, a lot of big cities have required some to be built in the incity sewage disposal plant effluent to reach " urban wastewater treatment firm pollutant emission standard " (GB 18918-2002) one-level A standard, independent BAF technology is difficult to reach, so the combination process of some BAF occurs in succession.Yet there are no report but adopt with using the method that anaerobic-aerobic that more BIOFOR pond type combines makes up BAF technical finesse sanitary sewage in traditional AO method technology and the BAF technology.
Summary of the invention
The N effect is relatively poor, effluent quality is poor except that P takes off in order to solve existing domestic sewage processing system existence in the present invention, be difficult to reach the problem of " urban wastewater treatment firm pollutant emission standard " (GB 18918-2002) standard that China carrying out, and then a kind of domestic sewage processing system that has anaerobic-aerobic combined biological filter is provided.
The present invention solves the problems of the technologies described above the technical scheme of taking to be: the domestic sewage processing system that has anaerobic-aerobic combined biological filter comprises pretreatment unit, biofloculation body filtering settling pond, backwashing wastewater pond and clean water basin; Described domestic sewage processing system also comprises anaerobic biofilter, BIOFOR BAF (aerobic biofilter), dephosphorization chemicals dosing plant, backwash pump, nitrification liquid reflux pump, return of waste water pump, nitrification liquid backflow water pipe, back flushing water pipe, return of waste water water pipe, bottom water inlet pipe, anaerobic biofilter counter-flushing liquid rising pipe, BAF counter-flushing liquid rising pipe, chemical feed pipe, rising pipe, several control valves and ultra violet sterilizer; Described pretreatment unit, biofloculation body filtering settling pond, anaerobic biofilter, BIOFOR BAF, backwashing wastewater pond and clean water basin set gradually from left to right; Anaerobic biofilter is by pond, filter tank body, filter plate, several strainer heads, the cobble supporting layer, filter material layer, stabilier, the slope, backwashing wastewater canal and go out water channel and form, filter plate is arranged on the interior inner chamber with pond, filter tank body of pond, filter tank body and is divided into two parts up and down, the lower cavity of filter plate is a water distributing area, several strainer heads are uniform to be arranged on the filter plate and the water-in of several strainer heads is positioned at water distributing area, be equipped with one deck cobble supporting layer on the upper surface of filter plate, be equipped with filter material layer on the cobble supporting layer, the water outlet notch place of the right side wall upper end of pond, filter tank body is provided with the slope, stabilier is arranged on the left end on slope, the backwashing wastewater canal, go out the right-hand member that water channel is successively set on the slope from left to right; The BIOFOR BAF is by Aerobic Pond pond body, the Aerobic Pond filter plate, several Aerobic Pond strainer heads, Aerobic Pond cobble supporting layer, the Aerobic Pond filter material layer, the Aerobic Pond stabilier, the Aerobic Pond slope, Aerobic Pond backwashing wastewater canal, Aerobic Pond goes out water channel, aerating apparatus and Aeration fan are formed, the Aerobic Pond filter plate is arranged on the interior inner chamber with Aerobic Pond pond body of Aerobic Pond pond body and is divided into two parts up and down, the lower cavity of Aerobic Pond filter plate is the Aerobic Pond water distributing area, several Aerobic Pond strainer heads are uniform to be arranged on the Aerobic Pond filter plate and the water-in of several Aerobic Pond strainer heads is positioned at the Aerobic Pond water distributing area, be equipped with one deck Aerobic Pond cobble supporting layer on the upper surface of Aerobic Pond filter plate, be equipped with the Aerobic Pond filter material layer on the Aerobic Pond cobble supporting layer, aerating apparatus is arranged in the Aerobic Pond cobble supporting layer, Aeration fan is connected with aerating apparatus, the water outlet notch place of the right side wall upper end of Aerobic Pond pond body is provided with the Aerobic Pond slope, the Aerobic Pond stabilier is arranged on the left end on Aerobic Pond slope, Aerobic Pond backwashing wastewater canal, Aerobic Pond goes out the right-hand member that water channel is successively set on the Aerobic Pond slope from left to right; The eddy flow sedimentation basin of pretreatment unit is communicated with the water distributing pipe of biofloculation body filtering settling pond, the water channel that goes out of biofloculation body filtering settling pond is communicated with water distributing area by the bottom water inlet pipe, the water channel that goes out in the anaerobic biofilter is communicated with the Aerobic Pond water distributing area, Aerobic Pond goes out water channel and is connected with clean water basin, Aerobic Pond goes out water channel and is communicated with an end of rising pipe, and described ultra violet sterilizer is arranged on the other end of rising pipe; The nitrification liquid reflux pump is installed in the clean water basin, the nitrification liquid reflux pump is communicated with water distributing area by nitrification liquid backflow water pipe, backwash pump is installed in the clean water basin, backwash pump is communicated with respectively with water distributing area, Aerobic Pond water distributing area by the back flushing water pipe, the return of waste water pump is installed in the backwashing wastewater pond, and the return of waste water pump is communicated with the water-in of pretreatment unit by the return of waste water water pipe; The backwashing wastewater canal is communicated with the backwashing wastewater pond by anaerobic biofilter counter-flushing liquid rising pipe, and Aerobic Pond backwashing wastewater canal is communicated with the backwashing wastewater pond by BAF counter-flushing liquid rising pipe; The dephosphorization chemicals dosing plant is made of dispensing jar and dosing pump, and dispensing jar and dosing pump are installed in the lower cavity between grid on the pretreatment unit, dispensing jar and dosing pump connection, and dosing pump is communicated with the Aerobic Pond water distributing area by chemical feed pipe; On nitrification liquid backflow water pipe, back flushing water pipe, return of waste water water pipe, anaerobic biofilter counter-flushing liquid rising pipe, BAF counter-flushing liquid rising pipe, chemical feed pipe and rising pipe, be respectively equipped with control valve.
The invention has the beneficial effects as follows: it is good to utilize the present invention to handle in domestic sewage denitrifying-dephosphorizing (remove P and the take off N) effect, and every index of treated water body all can reach " urban wastewater treatment firm pollutant emission standard " (GB 18918-2002) one-level A standard.Utilize the present invention to handle sanitary sewage and can reduce working strength of workers, can be completely achieved automatization control.It is few that the present invention adopts the combination of anaerobic biofilter and BAF to handle the sanitary sewage excess sludge production, and denitrification effect is good.In addition, the advantage that the present invention also has the sludge bulking of not being prone to, stablely is difficult for being hit, floor space is little, initial cost is few, working cost is low.The present invention is easy to system self is cleaned, and guarantees the quality of effluent quality.Utilize the present invention to handle sanitary sewage and improved treatment effect and effluent quality greatly, make sewage be able to qualified discharge.Use of the present invention has realized the high standard qualified discharge of sanitary sewage on engineering, be beneficial to and apply.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
Embodiment one: as shown in Figure 1, described domestic sewage processing system pretreatment unit, biofloculation body filtering settling pond, backwashing wastewater pond 20 and the clean water basin 24 that have anaerobic-aerobic combined biological filter of present embodiment; Described domestic sewage processing system also comprises anaerobic biofilter, BIOFOR BAF (aerobic biofilter), the dephosphorization chemicals dosing plant, backwash pump 23, nitrification liquid reflux pump 28, return of waste water pump 29, nitrification liquid backflow water pipe 48, back flushing water pipe 43, return of waste water water pipe 49, bottom water inlet pipe 11, anaerobic biofilter counter-flushing liquid rising pipe 51, BAF counter-flushing liquid rising pipe 52, chemical feed pipe 53, rising pipe 54, several control valves 60 and ultra violet sterilizer 32; Described pretreatment unit, biofloculation body filtering settling pond, anaerobic biofilter, BIOFOR BAF, backwashing wastewater pond 20 and clean water basin 24 set gradually from left to right; Anaerobic biofilter is by pond, filter tank body 10, filter plate 42, several strainer heads 13, cobble supporting layer 15, filter material layer 14, stabilier 16, slope 17, backwashing wastewater canal 18 and go out water channel 19 and form, filter plate 42 is arranged on pond, filter tank body 10 interior inner chambers with pond, filter tank body 10 and is divided into two parts up and down, the lower cavity of filter plate 42 is a water distributing area 12, several strainer heads 13 are uniform to be arranged on the filter plate 42 and the water-in of several strainer heads 13 is positioned at water distributing area 12, be equipped with one deck cobble supporting layer 15 on the upper surface of filter plate 42, be equipped with filter material layer 14 on the cobble supporting layer 15, the water outlet notch place of the right side wall upper end of pond, filter tank body 10 is provided with slope 17, stabilier 16 is arranged on the left end on slope 17, backwashing wastewater canal 18, go out the right-hand member that water channel 19 is successively set on slope 17 from left to right; The BIOFOR BAF is by Aerobic Pond pond body 110, Aerobic Pond filter plate 142, several Aerobic Pond strainer heads 113, Aerobic Pond cobble supporting layer 115, Aerobic Pond filter material layer 114, Aerobic Pond stabilier 116, Aerobic Pond slope 117, Aerobic Pond backwashing wastewater canal 118, Aerobic Pond goes out water channel 119, aerating apparatus 26 and Aeration fan 27 are formed, Aerobic Pond filter plate 142 is arranged on Aerobic Pond pond body 110 interior inner chambers with Aerobic Pond pond body 110 and is divided into two parts up and down, the lower cavity of Aerobic Pond filter plate 142 is an Aerobic Pond water distributing area 112, several Aerobic Pond strainer heads 113 are uniform to be arranged on the Aerobic Pond filter plate 142 and the water-in of several Aerobic Pond strainer heads 113 is positioned at Aerobic Pond water distributing area 112, be equipped with one deck Aerobic Pond cobble supporting layer 115 on the upper surface of Aerobic Pond filter plate 142, be equipped with Aerobic Pond filter material layer 114 on the Aerobic Pond cobble supporting layer 115, aerating apparatus 26 is arranged in the Aerobic Pond cobble supporting layer 115, Aeration fan 27 is connected with aerating apparatus 26, the water outlet notch place of the right side wall upper end of Aerobic Pond pond body 110 is provided with Aerobic Pond slope 117, Aerobic Pond stabilier 116 is arranged on the left end on Aerobic Pond slope 117, Aerobic Pond backwashing wastewater canal 118, Aerobic Pond goes out the right-hand member that water channel 119 is successively set on Aerobic Pond slope 117 from left to right; The eddy flow sedimentation basin 3 of pretreatment unit is communicated with the water distributing pipe 5 of biofloculation body filtering settling pond, the water channel 6 that goes out of biofloculation body filtering settling pond is communicated with water distributing area 12 by bottom water inlet pipe 11, going out water channel 19 is communicated with Aerobic Pond water distributing area 112, Aerobic Pond goes out water channel 119 and is connected with clean water basin 24, Aerobic Pond goes out water channel 119 and is communicated with an end of rising pipe 54, and described ultra violet sterilizer 32 is arranged on the other end of rising pipe 54; Nitrification liquid reflux pump 28 is installed in the clean water basin 24, nitrification liquid reflux pump 28 is communicated with water distributing area 12 by nitrification liquid backflow water pipe 48, backwash pump 23 is installed in the clean water basin 24, backwash pump 23 is communicated with respectively with water distributing area 12, Aerobic Pond water distributing area 112 by back flushing water pipe 43, return of waste water pump 29 is installed in the backwashing wastewater pond 20, and return of waste water pump 29 is communicated with the water-in of pretreatment unit by return of waste water water pipe 49; Backwashing wastewater canal 18 is communicated with backwashing wastewater pond 20 by anaerobic biofilter counter-flushing liquid rising pipe 51, and Aerobic Pond backwashing wastewater canal 118 is communicated with backwashing wastewater pond 20 by BAF counter-flushing liquid rising pipe 52; The dephosphorization chemicals dosing plant is made of dispensing jar 30 and dosing pump 31, dispensing jars 30 and dosing pump 31 are installed between grid on the pretreatment unit in 41 the lower cavity, dispensing jar 30 and dosing pump 31 are communicated with, and dosing pump 31 is communicated with Aerobic Pond water distributing area 112 by chemical feed pipe 53; On nitrification liquid backflow water pipe 48, back flushing water pipe 43, return of waste water water pipe 49, anaerobic biofilter counter-flushing liquid rising pipe 51, BAF counter-flushing liquid rising pipe 52, chemical feed pipe 53 and rising pipe 54, be respectively equipped with control valve 60.
Before BIOFOR BAF (upward flow type BAF) water outlet is back to anaerobic biofilter by water pump, reflux ratio 120%.Anaerobic biofilter (upward flow type anaerobic biofilter) is mainly used in denitrification denitrogenation under the anaerobic condition.The nitrogen overwhelming majority in the sewage is to exist with the ammonia nitrogen form, sewage is converted into nitrate nitrogen by ammonia nitrogen in the BIOFOR BAF, together enter into anaerobic biofilter with former water (treatment sewage) before the water after the BIOFOR BAF is nitrated is back to anaerobic biofilter; Former water provides carbon source, and recirculation water provides nitrate, sends out nitration reaction under the effect of denitrifying bacteria in filter material layer, and the nitrogen in the former water is finally discharged in anaerobic biofilter with the form of nitrogen.
The dephosphorization chemicals dosing plant is added to (dephosphorization equation: Fe in the BIOFOR BAF with liquor ferri trichloridi
3++ PO
3- 4=FePO
4↓) carry out dephosphorization.
Embodiment two: as shown in Figure 1, the described pretreatment unit of present embodiment by between grid 41, coarse rack 1, fine fack 2 and eddy flow sedimentation basin 3 constitute, described coarse rack 1, fine fack 2 are successively set between grid in 41 the upper cavity from left to right, and eddy flow sedimentation basin 3 is arranged between grid on 41 the right side.Coarse rack is that interval of grid strip is the rotary type grid of 10mm.Fine fack is that interval of grid strip is the Barrate type grilling of 2mm.Coarse rack 1 and fine fack 2 have been realized double interception.The size of eddy flow sedimentation basin 3 is determined according to flooding quantity.Other composition and annexation are identical with embodiment one.
Embodiment three: as shown in Figure 1, the described biofloculation body of present embodiment filtering settling pond by pond body 4, water distributing pipe 5, go out water channel 6 and shore pipe 9 is formed, describedly go out water channel 6 and be arranged in the top of pond body 4, offer several mud grooves 8 on pond body 4 bottom faces, water distributing pipe 5 is arranged in the bottom of pond body 4 and an end of water distributing pipe 5 passes the sidewall of pond body 4, shore pipe 9 is arranged in the bottom of pond body 4 and is positioned at the below of water distributing pipe 5, and the end that shore pipe 9 passes several mud grooves 8 and shore pipe 9 passes the sidewall of pond body 4.Described high-performance bio flocs unit filtering-depositing device is a prior art, sewage has been realized filtering-depositing efficiently therein, also can produce the biological hydrolysis effect, (BOD is exactly a biological oxygen demand, Biology Oxygen Demmand tentatively to have reduced the BOD loading of sewage.Refer to the be degraded amount of oxygen of post consumption of organism that the microorganism in the water can degrade.But biological the degradation of organic substances required time is longer fully.For standard with improve detection efficiency, national regulation that is to say the total amount of the oxygen that was consumed in 5 days with organism in the biological degradation water with the standard that biological oxygen demand on the 5th is an explanation water quality), improved the biodegradability of sewage.Other composition and annexation are identical with embodiment one.
Embodiment four: as shown in Figure 1, the described domestic sewage processing system of present embodiment also comprises back flushing blower fan 21, back flushing tracheae 22 and two back flushing control valves 61, back flushing blower fan 21 is arranged between anaerobic biofilter and the BIOFOR BAF, back flushing blower fan 21 is communicated with respectively with water distributing area 12, Aerobic Pond water distributing area 112 by back flushing tracheae 22, and back flushing tracheae 22 is provided with two back flushing control valves 61.So design can realize air purge, air-water back flushing, rinsing (washing) three step back flushinges to anaerobic biofilter and BIOFOR BAF.The valve of the control valve of backwashing wastewater canal 18 and Aerobic Pond backwashing wastewater canal 118 lower ends is being closed during normal the operation, and sewage enters next technique unit by going out water channel; When back flushing, valve open, backwash waste entered backwashing wastewater pond 20 in 118 minutes by backwashing wastewater canal 18, Aerobic Pond backwashing wastewater canal.At first, the filter tank inlet valve is closed, stop into water, open back flushing blower fan 21 and respective valves thereof then, backwash gas enters filter tank water distributing area 12, Aerobic Pond water distributing area 112 respectively by back flushing tracheae 22, enter filter material layer 14 and enter Aerobic Pond filter material layer 114 by strainer head 13 by Aerobic Pond strainer head 113, and then interior filtrate, the interior filtrate of BIOFOR BAF of loosening anaerobic biofilter, air purge mainly plays the purpose of loosening filtrate; Then, open the backwash pump 23 and the respective valves that are arranged in clean water basin 24, the back flushing of beginning air-water, the air-water back flushing is the key step of backwashing procedures, that washes wants fully.After the air-water back flushing finishes, only close back flushing blower fan 21 earlier, do not close backwash pump 23, carry out for some time rinsing, the rinsing purpose is the further discharge system such as suspended substance, disengaging microbial film that holds back that the air-water back flushing is washed.General control water backwashing intensity is 20m3/ (m
2H) about, gas back washing strength 50m
3/ (m2h) about.The air purge time: air-water back flushing: rinsing time three's ratio is controlled at about 1: 5: 2, and specifically the enforcement time is determined on a case-by-case basis.Other composition and annexation are identical with embodiment one, two or three.
Utilize the present invention to handle the operational process of sanitary sewage:
Sanitary sewage enters water outlet behind pretreatment system, biofloculation body filtering settling pond, anaerobic biofilter, BIOFOR BAF, the ultra violet sterilizer in turn.One, sewage at first enters coarse rack 1, the fine fack 2 of pretreatment system, holds back down than behind the bigger material through double grid, and sewage enters rotational flow grit chamber 3, and the waterpower surface load of rotational flow grit chamber 3 is controlled at 130m
3/ m
2About h, the residence time is controlled at about 40s.Two, subsequently, the sewage by the pretreatment system preliminary treatment enters into biofloculation body filtering settling pond 4, and sewage enters from the bottom water distributing pipe 5 in pond, goes out water channel 6 water outlets by top.Can form a sludge suspension layer 7 in biofloculation body filtering settling pond by debugging, this sludge blanket is similar to filtering layer, the suspended solid in the sewage and most of colloidalmaterial can be held back rapidly and adsorbed.And in this suspended sludge layer, can produce the aerobic-anaerobic microbe of high density, with insoluble hydrolysis of organic matter is dissolved matter, the material of macromole and difficult degradation is converted into and is easy to biodegradable material, this settling tank does not need dosing coagulant, is controlled at about 4～6 hours according to the influent quality residence time.Biofloculation body filtering settling pond bed mud concentrates in the mud groove 8; When spoil disposal, open valve, by hydraulic action, mud is discharged system by shore pipe 9.Three, the water outlet of biofloculation body filtering settling pond enters into anaerobic biofilter.After the recirculation water of sewage and the water outlet of BIOFOR BAF compiles, enter into water distributing area 12 by bottom water inlet pipe 11, reflux ratio 120%.Sewage enters into filter material layer 14 by strainer head 13 from water distributing area 12.The filter material layer bottom is covered with the supporting layer 15 that one deck cobble is formed.Belong to anaerobic environment in the filter material layer, sewage carries out the removal of BOD, COD, nitrate nitrogen, SS therein.The water outlet notch of anaerobic biofilter is provided with stabilier 16 and slope 17, and filtrate is run out of when preventing back flushing.Valve during normal the operation under the backwashing wastewater canal 18 is being closed, and sewage enters next technique unit by going out water channel.Four, the water outlet of anaerobic biofilter enters into the BIOFOR BAF.The structure and the anaerobic biofilter of BIOFOR BAF are basic identical, have just laid aeration tube 26 in supporting layer, and source of the gas is provided by Aeration fan 27.Five, the water outlet of an anaerobic biofilter part flows in the clean water basin 24, and a part is discharging after sterilizing.A water part that flows in the clean water basin 24 is back in the anaerobic biofilter 10 by Digestive system reflux pump 28, for back flushing provides the water source.And backwashing wastewater finally focuses in the backwashing wastewater pond 20, is back in the pretreatment unit by return of waste water pump 29.Dispensing jar 30 stores liquor ferri trichloridi, is added in the BIOFOR BAF by dosing pump 31, finishes the chemical dephosphorization reaction in the BIOFOR BAF.Uv sterilisation machine 32 (disinfection by ultraviolet light machine) sterilization that sterilization is adopted.Behind uv sterilisation, former water can reach " urban wastewater treatment firm pollutant emission standard " (GB 18918-2002) one-level A emission standard.
BOD is exactly a biological oxygen demand, and Biology Oxygen Demmand refers to the be degraded amount of oxygen of post consumption of organism that the microorganism in the water can degrade; But biological the degradation of organic substances required time is longer fully, and for standard and raising detection efficiency, national regulation serves as the standard that water quality is described with biological oxygen demand on the 5th, that is to say the total amount of the oxygen that was consumed in 5 days with organism in the biological degradation water.
COD is a chemical oxygen demand (COD), is under certain conditions, when adopting certain strong oxidizer to handle water sample, and the oxidant content that is consumed.It is what a index of reducing substances in the expression water; Reducing substances in the water has various organism, nitrite, sulfide, ferrous salt etc., but main is organism, therefore, chemical oxygen demand (COD) (COD) is again often as weighing what index of organic content in the water, chemical oxygen demand (COD) is big more, illustrates that water body is subjected to organic pollution serious more.
SS is the abbreviation of English (Suspended Substance), i.e. suspended substance in the water quality.Suspended substance refers to that water sample is that the membrane retention of 0.45 μ m is on filter membrane and in 103～105 ℃ of solid matters of drying to constant weight by the aperture in the water quality, it is one of important indicator of weighing the water quality pollution level, capital C commonly used is represented suspension content in the water quality, and measure unit is mg/L.
Claims (4)
1. the domestic sewage processing system that has anaerobic-aerobic combined biological filter, described domestic sewage processing system comprise pretreatment unit, biofloculation body filtering settling pond, backwashing wastewater pond (20) and clean water basin (24); It is characterized in that: described domestic sewage processing system also comprises anaerobic biofilter, the BIOFOR BAF, the dephosphorization chemicals dosing plant, backwash pump (23), nitrification liquid reflux pump (28), return of waste water pump (29), nitrification liquid backflow water pipe (48), back flushing water pipe (43), return of waste water water pipe (49), bottom water inlet pipe (11), anaerobic biofilter counter-flushing liquid rising pipe (51), BAF counter-flushing liquid rising pipe (52), chemical feed pipe (53), rising pipe (54), several control valves (60) and ultra violet sterilizer (32); Described pretreatment unit, biofloculation body filtering settling pond, anaerobic biofilter, BIOFOR BAF, backwashing wastewater pond (20) and clean water basin (24) set gradually from left to right;
Anaerobic biofilter is by pond, filter tank body (10), filter plate (42), several strainer heads (13), cobble supporting layer (15), filter material layer (14), stabilier (16), slope (17), backwashing wastewater canal (18) and go out water channel (19) and form, filter plate (42) is arranged on the interior inner chamber with pond, filter tank body (10) of pond, filter tank body (10) and is divided into two parts up and down, the lower cavity of filter plate (42) is water distributing area (12), several strainer heads (13) are uniform to be arranged on that filter plate (42) is gone up and the water-ins of several strainer heads (13) are positioned at water distributing area (12), be equipped with one deck cobble supporting layer (15) on the upper surface of filter plate (42), be equipped with filter material layer (14) on the cobble supporting layer (15), the water outlet notch place of the right side wall upper end of pond, filter tank body (10) is provided with slope (17), stabilier (16) is arranged on the left end of slope (17), backwashing wastewater canal (18), go out the right-hand member that water channel (19) is successively set on slope (17) from left to right;
The BIOFOR BAF is by Aerobic Pond pond body (110), Aerobic Pond filter plate (142), several Aerobic Pond strainer heads (113), Aerobic Pond cobble supporting layer (115), Aerobic Pond filter material layer (114), Aerobic Pond stabilier (116), Aerobic Pond slope (117), Aerobic Pond backwashing wastewater canal (118), Aerobic Pond goes out water channel (119), aerating apparatus (26) and Aeration fan (27) are formed, Aerobic Pond filter plate (142) is arranged on the interior inner chamber with Aerobic Pond pond body (110) of Aerobic Pond pond body (110) and is divided into two parts up and down, the lower cavity of Aerobic Pond filter plate (142) is Aerobic Pond water distributing area (112), several Aerobic Pond strainer heads (113) are uniform to be arranged on that Aerobic Pond filter plate (142) is gone up and the water-ins of several Aerobic Pond strainer heads (113) are positioned at Aerobic Pond water distributing area (112), be equipped with one deck Aerobic Pond cobble supporting layer (115) on the upper surface of Aerobic Pond filter plate (142), be equipped with Aerobic Pond filter material layer (114) on the Aerobic Pond cobble supporting layer (115), aerating apparatus (26) is arranged in the Aerobic Pond cobble supporting layer (115), Aeration fan (27) is connected with aerating apparatus (26), the water outlet notch place of the right side wall upper end of Aerobic Pond pond body (110) is provided with Aerobic Pond slope (117), Aerobic Pond stabilier (116) is arranged on the left end of Aerobic Pond slope (117), Aerobic Pond backwashing wastewater canal (118), Aerobic Pond goes out the right-hand member that water channel (119) is successively set on Aerobic Pond slope (117) from left to right;
The eddy flow sedimentation basin (3) of pretreatment unit is communicated with the water distributing pipe (5) of biofloculation body filtering settling pond, the water channel (6) that goes out of biofloculation body filtering settling pond is communicated with water distributing area (12) by bottom water inlet pipe (11), the water channel (19) that goes out in the anaerobic biofilter is communicated with Aerobic Pond water distributing area (112), Aerobic Pond goes out water channel (119) and is connected with clean water basin (24), Aerobic Pond goes out water channel (119) and is communicated with an end of rising pipe (54), and described ultra violet sterilizer (32) is arranged on the other end of rising pipe (54); Nitrification liquid reflux pump (28) is installed in the clean water basin (24), nitrification liquid reflux pump (28) is communicated with water distributing area (12) by nitrification liquid backflow water pipe (48), backwash pump (23) is installed in the clean water basin (24), backwash pump (23) is communicated with respectively with water distributing area (12), Aerobic Pond water distributing area (112) by back flushing water pipe (43), return of waste water pump (29) is installed in the backwashing wastewater pond (20), and return of waste water pump (29) is communicated with the water-in of pretreatment unit by return of waste water water pipe (49); Backwashing wastewater canal (18) is communicated with backwashing wastewater pond (20) by anaerobic biofilter counter-flushing liquid rising pipe (51), and Aerobic Pond backwashing wastewater canal (118) is communicated with backwashing wastewater pond (20) by BAF counter-flushing liquid rising pipe (52); The dephosphorization chemicals dosing plant is made of dispensing jar (30) and dosing pump (31), dispensing jar (30) and dosing pump (31) are installed in the lower cavity of (41) between grid on the pretreatment unit, dispensing jar (30) and dosing pump (31) are communicated with, and dosing pump (31) is communicated with Aerobic Pond water distributing area (112) by chemical feed pipe (53); On nitrification liquid backflow water pipe (48), back flushing water pipe (43), return of waste water water pipe (49), anaerobic biofilter counter-flushing liquid rising pipe (51), BAF counter-flushing liquid rising pipe (52), chemical feed pipe (53) and rising pipe (54), be respectively equipped with control valve (60).
2. the domestic sewage processing system that has anaerobic-aerobic combined biological filter according to claim 1, it is characterized in that: described pretreatment unit is made of (41), coarse rack (1), fine fack (2) and eddy flow sedimentation basin (3) between grid, described coarse rack (1), fine fack (2) are successively set in the upper cavity of (41) between grid from left to right, and eddy flow sedimentation basin (3) is arranged on the right side of (41) between grid.
3. the domestic sewage processing system that has anaerobic-aerobic combined biological filter according to claim 1, it is characterized in that: described biofloculation body filtering settling pond is by pond body (4), water distributing pipe (5), going out water channel (6) and shore pipe (9) forms, describedly go out water channel (6) and be arranged in the top of pond body (4), offer several mud grooves (8) on pond body (4) bottom face, water distributing pipe (5) is arranged in the bottom of pond body (4) and an end of water distributing pipe (5) passes the sidewall of pond body (4), shore pipe (9) is arranged in the bottom of pond body (4) and is positioned at the below of water distributing pipe (5), and the end that shore pipe (9) passes several mud grooves (8) and shore pipe (9) passes the sidewall of pond body (4).
4. according to claim 1, the 2 or 3 described domestic sewage processing systems that have anaerobic-aerobic combined biological filter, it is characterized in that: described domestic sewage processing system also comprises back flushing blower fan (21), back flushing tracheae (22) and two back flushing control valves (61), back flushing blower fan (21) is arranged between anaerobic biofilter and the BIOFOR BAF, back flushing blower fan (21) is communicated with respectively with water distributing area (12), Aerobic Pond water distributing area (112) by back flushing tracheae (22), and back flushing tracheae (22) is provided with two back flushing control valves (61).
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| CN2009100716913A CN101514067B (en) | 2009-04-01 | 2009-04-01 | Domestic sewage processing system with anaerobic-aerobic combined biological filter |
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| CN110282817A (en) * | 2019-06-14 | 2019-09-27 | 盐城恒清河湖整治有限公司 | A kind of winter available family sewage disposal device |
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