CN1396127A - Process and apparatus for treating life sewage - Google Patents

Abstract

A process for treating life sewage includes such steps as deposition, filter, stage-1 biochemical reaction, aerating oxygen, stage-2 biochemical reaction, aerating oxygen again, deposition, further aerating oxygen, sampling and drainage to outside. Its advantages are high effect and less generated mud.

Description

A kind of domestic sewage processing method and device thereof

(1) technical field

The invention belongs to environmental technology field, specially refer to a kind of novel technical method and device thereof of sanitary sewage disposal.

(2) background technology

At present, city domestic sewage has become the main source of water pollution, the pertinent data report, sanitary sewage accounts for about 50% of national wastewater emission amount, COD quantity discharged in the sanitary sewage accounts for about 45% of total COD quantity discharged, the discharging of sanitary sewage has along the Yangtze River constituted the main source of pollution of the Changjiang river water body, thereby governments at all levels and various circles of society extremely pay close attention to the prevention and cure of pollution of city along the river's sanitary sewage.Because sewage work's investment and working cost that construction scale is bigger are higher, cycle is longer, so can not adapt to the urban construction and development needs, for this reason, various buried no energy consumption sanitary sewage disposal technology are arisen at the historic moment, the technology of these technology, main based on simple biology " anaerobism " processing mode, be aided with simple " aerobic " and handle, because these treatment process are difficult to carry out fully periodic duty repeatedly, denitrogenation dephosphorization effect is often not obvious, is difficult to reach qualified emission standards.For this reason, I have carried out repetitious experimental study, find out a kind of feasible method, under the condition of no energy consumption, make the operation of anaerobic-aerobic multistage alternating, through the organic waste water after the anaerobic treatment under the difference of height condition, flow into oxygenator by aperture, flowing air contacts in making sewage and filling oxygen, and oxygen is shifted in sewage, the mixed solution dissolved oxygen is on the increase, increase mass transfer velocity, accelerated the metabolism and the breeding of aerobic microbiological, increased the activity of mud, improved absorption, absorb, the ability of decomposing organic matter, thus make sewage be beneficial to bio-oxidation and purification.Simultaneously, the anaerobic and aerobic bioprocess is two only stage which must be passed bies of sewage depths reason, by these two stages, just can reach the effect of deoxidation dephosphorization.

(3) summary of the invention

The technical issues that need to address of the present invention are, at main based on simple bio anaerobic processing mode in the prior art of sanitary sewage disposal, be aided with simple aerobic treatment, thereby be difficult to carry out the operation of biochemical periodic reaction fully repeatedly, and deoxidation dephosphorization DeGrain is difficult to reach many defectives such as emission standard, and restudy a kind of novel method that makes anaerobic-aerobic multistage alternating operation, to reach the advanced treatment requirement, the objective of the invention is to realize by the following technical solutions, a kind of domestic sewage processing method, comprise that mainly sediment filters, biochemical periodic reaction under the anaerobic condition, it is characterized in that, present method increases the oxygenation operation, makes the operation of anaerobic-aerobic multistage alternating, carries out according to following process flow steps:

Sanitary sewage; The sediment coarse filtration; The biochemical periodic reaction of one-level; The operation of oxygenation for the first time; The secondary biochemical periodic reaction; The operation of oxygenation for the second time; Precipitation; Oxygenation for the third time; Water sampling; Efflux.Described oxygenation operation, its ultimate principle, be under height pressure reduction condition, to flow into oxygenator by aperture through the organic waste water after the anaerobic treatment, sewage is contacted with flowing air in the oxygenator, oxygen is shifted in sewage, the mixed solution dissolved oxygen is on the increase, increased rate of mass transfer, zoogloea has bigger perviousness in the biological floe, the metabolism and the breeding of aerobic microbiological have been accelerated, increased the activity of mud, improved the ability of absorption, absorption, decomposing organic matter, thereby made the sewage be beneficial to bio-oxidation and purification; Each operation of the comprehensive oxygenic aeration of oxygenation, biofiltration, bio-contact oxidation is carried out.Sewage has certain residence time through filler, filler forms the sludge-like microbial film, under aerobic condition, the a large amount of aerobic microbiologicals of breeding on this film, play to purify in absorption and the degradation of sewage engine dyeing thing is arranged, the old and feeble microbial film that splits away off from filler flows into settling tank with sewage, through the precipitation defecate and purify.For finishing above-mentioned technical process, and arranged special-purpose facility, a kind of sewage treatment unit, comprise the sediment coarse filter, biochemical periodic reaction pond is characterized in that, the bottom in the biochemical periodic reaction of firsts and seconds pond is anaerobic mud bed, the middle part is the anaerobic filter that contains filler, and top is provided with oxygenator, and settling tank and water sampling well are connected after the biochemical periodic reaction pond.Oxygenator is comprehensive oxygenic aeration, biological filter, bio-contact oxidation performance synthesis equipment, and described oxygenator device is the equipment that is processed by novel synthetic material, the novel synthetic material of packing in it type filler.Described novel synthetic material is to mould plate and TVC material synthetic by Al.Air in oxygenator is unimpeded, airborne oxygen can be dissolved into rapidly in the mobile sewage of little fine rule (dripping) shunting under the sewage height pressure in the pond, thereby pass to microbial film by adhering to water layer, be used for breathing for aerobic microbiological, organic pollutant is passed to by mobile water layer and adheres to water layer in the sewage, enter microbial film again, be degraded by bacterial metabolism is movable, sewage constantly is being purified in the flow process, the meta-bolites H2O of microorganism drain with current and CO2 and gases such as anaerobic layer resolvent H2S, NH3 and CH4 then overflow and enter air from water layer.

The invention has the beneficial effects as follows that it can be worked under the condition that no new energy consumption is not taken up an area of again in addition, and the water yield, change of water quality are had than strong adaptability, under low water temperature condition, also can keep purification function, the sludge quantity of generation is few; Have nitrated preferably, denitrogenation, take the photograph the phosphorus function, make sanitary sewage after this handles, reach the advanced treatment requirement fully.

(4) description of drawings

Fig. 1 is a life sewage treatment process block diagram

Fig. 2 is the sewage treatment unit synoptic diagram

(5) embodiment

With reference to Fig. 1, the technical process of expression domestic sewage processing method, increase the oxygenation operation, it is the principal feature of this technical process, whole process has the triple-oxygenation process, with reference to Fig. 2, the special facilities device of representing corresponding above-mentioned treatment process, 1 is the sediment coarse filter among the figure, biochemical periodic reaction pond 4 of one-level that coupled is and secondary biochemical reaction tank 5, this I and II biochemical reaction tank bottom are anaerobic mud bed 3, and this sludge sump top is the anaerobic filter 2 that contains filler, top is oxygenator 6, and what be connected on the biochemical reaction tank back is settling tank 7 and water sampling well 8.

Claims (3)

1, a kind of domestic sewage processing method comprises that mainly sediment filters, biochemical periodic reaction, it is characterized in that, increases the oxygenation operation, makes the operation of anaerobic-aerobic multistage alternating, carries out according to following process flow steps:

Sanitary sewage; The sediment coarse filtration; The biochemical periodic reaction of one-level; The operation of oxygenation for the first time; The secondary biochemical periodic reaction; The operation of oxygenation for the second time; Precipitation; Oxygenation for the third time; Water sampling; Efflux.

2, domestic sewage processing method according to claim 1 is characterized in that, described oxygenation operation comprises the combined reaction of oxygenic aeration, biofiltration, each process of bio-contact oxidation; Sewage has the residence time through filler, and filler forms the sludge-like microbial film, a large amount of aerobic microbiologicals of breeding on this film, and playing has the engine dyeing thing in purification, absorption and the degradation of sewage.

3, a kind of sewage treatment unit, comprise the sediment coarse filter, biochemical periodic reaction pond, it is characterized in that, the bottom in the biochemical periodic reaction of firsts and seconds pond is anaerobic mud bed, the middle part is the anaerobic filter that contains filler, and top is provided with oxygenator, and settling tank and water sampling well are connected after the biochemical periodic reaction pond.