A kind of alternative aeration filtering biological reactor
The utility model relates to municipal sanitary sewage disposal technical field, relates in particular to aeration filtration bio-reactor wherein.
City domestic sewage is the product in urban development, is accompanied by urbanization and industrialized high speed progress, and the generation of sanitary sewage is increasing, and environmental pollution seriously aggravates, and becomes a large important factor of restriction social economy sustainable development.What at present domestic and international sewage disposal technology, employing was the most general is exactly physico-chemical processes and biologic treating technique, and biologic treating technique is more extensive.At present, in sanitary sewage, the increase of pollutant kind and quantity and country cause most traditional technology cannot reach the index of defined for the raising of Pollution abatement index, face the difficult situation of being badly in need of transformation.So need to deepen traditional technology, optimisation technique parameter, improves effluent quality, cuts operating costs, and therefore sewage disposal technology need to be innovated raising in a hurry on conventional art, to tackle the demand of new markets.
Traditional BAF treatment technology, by certain technique means, allows fixing microorganic adhesion on carrier, makes microorganism set growth, larger surface-area is conducive to increase the quantity of microorganism, improve system processing power and adaptability, shorten the treatment time, reduce processing cost.But still there is a series of problem in BAF: during as aeration, filler and biomembranous filtering function can not be brought into play its effect completely, and not process the appropriate suspended substance that causes higher for the mutual relationship between bio-oxidation function and filtering function; In traditional backwash process, cause biomembranous big area to come off and the waste of backwash water etc.
summary of the invention
For the deficiency of traditional existing treatment technology of BAF, the utility model provides a kind of alternative aeration filtering biological reactor, to reach, effluent quality is good, investment operation cost is low, without back flushing, can realize the object of high-efficient denitrification and dephosphorization and the suspended substance removal of city domestic sewage.
For achieving the above object, the utility model provides a kind of alternative aeration filtering biological reactor, comprises housing, and described housing comprises two reaction chambers, and " aeration-filtration " according to the certain hour cycle, hockets.Two reaction chamber bottoms are equipped with cloth water gathering system, are upwards aerating system, floating stuffing district and excess sludge district successively.On this new suspended packing, a large amount of micropopulations in load, can carry out the organism in absorption degradation water.In the time of aeration, floating stuffing evenly suspends in water, and relies on microbial film degraded water pollutant; In the time stopping aeration, the rapid deposition of filler (filler proportion is greater than sewage proportion), forms good filtering layer.
The beneficial effects of the utility model are: biological reaction tank and filtration are organically combined in to one, compact construction, floor space is little, only needs a set of equipment city domestic sewage to be carried out a biological disposal upon, and effluent quality is good, cost of investment is low, level of automation is high, operation and maintenance is all very convenient.And device integrates biochemical treatment, filters, soil removability is strong, reliability is high, and effluent quality safety and stability, for BAF provides new technical scheme.Can be widely used in municipal sanitary sewage disposal field.
accompanying drawing explanation;
Fig. 1 is structural representation of the present utility model.
In figure: 1. housing; 2. water inlet pipe (the double rising pipe that does); 3. water distribution system (the double water gathering system of doing); 4. aeration tube; 5. bed course; 6. floating stuffing district (the double filtrating area of doing); 7. excess sludge district; 8. water hole; 9. shore pipe; 10. filtrating area (Jian Zuo floating stuffing district); 11. rising pipes (the double water inlet pipe that does); 12. dividing plates.
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Illustrated a kind of alternative aeration filtering biological reactor, housing 1 is divided into two reaction chambers by dividing plate 12, the bottom of described housing 1 is equipped with respectively water inlet pipe (the double rising pipe that does) 2, housing 1 inside is provided with water distribution system (the double water gathering system of doing) 3, aeration tube 4, bed course 5, floating stuffing district (the double filtrating area of doing) 6, excess sludge district 7, water hole 8, shore pipe 9, filtrating area (Jian Zuo floating stuffing district) 10, rising pipe (the double water inlet pipe that does) 11 successively along water (flow) direction (within a reaction time, in the time that 2 are water inlet pipe).
In above-mentioned floating stuffing district (the double filtrating area of doing) 6 and 10, be filled with efficient suspension fiber many-sided ball, many-sided ball diameter 2.7cm, proportion approximately 1.007, under the condition of aeration, this filler is in suspension swelling state, strengthen the surface-area of bio-film colonization, can carry out the absorption degradation of pollutent, under the state of aeration not, this filler belongs to the state of static compacting, can be used as filtering layer and filters suspended substance; The effect of above-mentioned aeration tube 4 is that air is inputted to above-mentioned floating stuffing district 6, for the microbial film on filler is built good aerobic environment; The effect of above-mentioned bed course 5 is for carrier filler district provides support, and prevents that filler from being washed away by current; What assembled in above-mentioned excess sludge district 7 comes off microbial film mud by above-mentioned shore pipe 9 dischargers; Water hole 8 is communicated with two reaction chambers, and water hole 8 is provided with the Stainless Steel Wire Mesh of certain pore size, in order to hold back the floating stuffing in above-mentioned floating stuffing district 6 and 10, prevents that the floating stuffing string of two reaction chambers is mixed; The filtering layer that filtrating area 10 utilizes high efficiency filter fiber many-sided ball to pile up and forms filters the sewage after biological membrane biological degraded in floating stuffing district 6, with the suspended substance in trap water and the microbial film coming off.
According to periodic duty: sewage enters reaction chamber bottom by water-in 2, by water distribution system 3 water distribution uniformities, carry out aeration by reaction chamber bottom aerating system 4 simultaneously, the multiaspect fibrous nodules in floating stuffing district (the double filtrating area of doing) 6 suspends and expands, its epontic microbial film carries out biochemical reaction and removes most organic pollutant in sewage, the tiny bubble simultaneously producing when aeration is sheared microbial film aging on filler to come off, the aging microbial film coming off is through entering with the water hole 8 of wire netting the reaction chamber being directly connected with rising pipe 11, now aeration is not carried out in this side reaction chamber, the filler of this reaction chamber filtrating area 10 is in piling up compaction state, current are through out-of-date, filler plays the effect of filtration, filter most suspended substance and the aging microbial film coming off, hold back on the top of reaction chamber and formed the excess sludge district 7 that one deck is made up of the microbial film that comes off simultaneously, get rid of excess sludge by shore pipe 9.Sewage after filtration district 10 filter after by rising pipe 11 qualified discharges.Otherwise in the next cycle, sewage enters reaction chamber by rising pipe (the double water inlet pipe that does) 11, through aeration biochemical reaction and after filtering by water inlet pipe (the double rising pipe that does) 2 discharge systems." aeration-filtration, filtration-aeration " periodically alternate run, can remove the back flushing operation in traditional BAF from this manner, makes water outlet more stable, and denitrogenation dephosphorizing is more abundant.
This device saves the back flushing operation in second pond and the BAF of traditional biological reaction, level of automation is high, facilitate operation maintenance management, water quality after treatment can reach city domestic sewage completely and process one-level A standard, inherit the advantage of traditional technology, overcome again its shortcoming, be obviously better than traditional technology.