CN103449675B - Construction method of rural domestic sewage combined treatment system - Google Patents

Construction method of rural domestic sewage combined treatment system Download PDF

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Publication number
CN103449675B
CN103449675B CN201310408928.9A CN201310408928A CN103449675B CN 103449675 B CN103449675 B CN 103449675B CN 201310408928 A CN201310408928 A CN 201310408928A CN 103449675 B CN103449675 B CN 103449675B
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China
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domestic sewage
oxidation bed
vertical current
constructed wetland
current constructed
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CN201310408928.9A
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CN103449675A (en
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邓风
童宁
管小江
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Nanjing University
Nanjing University of Science and Technology
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Nanjing University of Science and Technology
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Abstract

The invention discloses a construction method of a rural domestic sewage combined treatment system. A main treatment system comprises a self-oxygenation multi-level biological contact oxidation bed and a reinforced phosphorous removal vertical flow artificial wetland, and has the characteristics of low energy consumption, economy, high efficiency, small sludge quantity, convenience in maintenance and management and the like; the purified water reaches the A-level standard of (GB18918-2002) of the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant, the rural regional ecological environment can be improved, and a virtuous cycle of water resources is realized. According to the construction method of a rural domestic sewage combined treatment system, disclosed by the invention, the main treatment system comprises the self-oxygenation multi-level biological contact oxidation bed and the vertical flow artificial wetland; the collected rural domestic sewage is firstly subjected to aerobic biological treatment by the self-oxygenation multi-level biological contact oxidation bed and then enters the vertical flow artificial wetland; the sewage is further purified under the synergistic effect of plants, microorganisms and substrates; the vertical flow artificial wetland takes aerated blocks as the substrates to reinforce phosphorous removal.

Description

A kind of construction process of domestic sewage of villages and small towns composite processing system
Technical field
The present invention relates to a kind of construction process of sewage composite processing system, particularly relate to a kind of construction process of domestic sewage of villages and small towns composite processing system, belong to saprobia eco-treatment technology field.
Background technology
Since reform and opening-up, Development of China's Urbanization is progressively accelerated, and meanwhile, villages and small towns water surrounding is subject to unprecedented severe challenge.The many villages and small towns of China due to sewage treatment facility construction seriously delayed, water pollution has become restriction local society and " bottleneck " of Economic development.Therefore villages and small towns sewage disposal is the needs of villages and small towns self-growth, is also river basin ecological environment protection needs.
Villages and small towns sewage has the features such as quantity of wastewater effluent increases day by day, water quantity and quality ununiformity large, receiving water body environmental capacity is little, and villages and small towns sewage treatment process is mainly divided into conventional treatment process and Ecological Disposal technique.Along with sewage disposal technology development is swift and violent, many novel process are developed on the basis of traditional activated sludge process, the various novel process with dephosphorization denitrogenation, as SBR, AB method, A/O, A2/O technique etc., becomes the main flow of sewage treatment process gradually.Biomembrance process technical development goes out blodisc, ordinary biofilter, BAF etc., and the technique that activated sludge process combines with biomembrance process.Eco-treatment technology also develops to combination process by being used alone land treatment systems, wetland variation, stabilization pond etc. in the past.The sewage disposal of current villages and small towns exists that sewage collecting difficulty, processing efficiency are not high, construction fund lacks, operational management lacks in ability and the problem such as sludge treatment, therefore researches and develops economical and efficient, operational management simple villages and small towns sewage disposal technology has important practical significance.
Summary of the invention
The invention solves problems of the prior art with not enough, a kind of construction process of domestic sewage of villages and small towns composite processing system is provided.Body processing system is from oxygenation multi-stage biological catalytic oxidation bed and reinforced phosphor-removing vertical current constructed wetland, there is the features such as energy consumption is low, economical and efficient, sludge quantity are few, maintenance management is convenient, purification water outlet reaches " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) one-level A standard, the zonal ecotope in villages and small towns can be improved, realize water resources benign cycle.
The present invention is achieved by the following technical solutions:
The construction process of domestic sewage of villages and small towns composite processing system of the present invention, its body processing system is from oxygenation multiple stage circulation biological contact oxidation bed and vertical current constructed wetland, domestic sewage of villages and small towns after collection, first through carrying out Aerobic biological process from oxygenation multiple stage circulation biological contact oxidation bed, enter vertical current constructed wetland again, purify waste water further under the synergy of plant, microorganism and matrix, wherein vertical current constructed wetland adopts and adds building block as matrix, reinforced phosphor-removing.
The construction process of domestic sewage of villages and small towns composite processing system of the present invention, its further technical scheme described adopts PVC floating stuffing from oxygenation multiple stage circulation catalytic oxidation bed, biological contact oxidation bed is according to sewage quality situation setting 3 ~ 5 grades, the every grade of height of bed 40 ~ 50cm, turnover water tank is established at two ends, adopts siphon pipe Inlet and outlet water; Further technical scheme is the filler that every grade of described oxidation bed bottom filling district all spreads 2 ~ 3 floor Φ 50mm, repave the filler of 6 ~ 8 layers of Φ 25mm above, media-filling rate is that every layer of catalytic oxidation bed two ends are crisscross arranged siphon pipe, and this layer of siphon rising pipe is lower floor's siphon inlet pipe.Filler can biofilm success voluntarily through about 15 ~ 20 days.Sewage is introduced into upper strata biological contact oxidation bed, then enters lower floor through siphon step by step, and on earth after the water storage tank of bottom, then be promoted to upper bed by water circulating pump, complete a loop cycle, the number of times of circular treatment is determined according to the sewage quality situation of process.The process of the emptying and water-filling of filler experience sewage in every layer of bed, automatically can realize air reaeration, in sewage, dissolved oxygen concentration increases step by step, is conducive to pollutant aerobic biological degradation.As place license, increase biological contact oxidation bed progression, then can corresponding minimizing cycle index, vice versa.
The construction process of domestic sewage of villages and small towns composite processing system of the present invention, its further technical scheme can also be that described vertical current constructed wetland divides upper, middle and lower-ranking, lower floor and middle level lay different diameter, different thickness add building block as matrix with reinforced phosphor-removing, upper strata is soil matrix, and vertical current constructed wetland arranges perforation water distributor and perforation header system simultaneously; Further technical scheme is described vertical current constructed wetland lower floor laying particle diameter is that 1 ~ 2cm adds building block, and middle level is laid particle diameter 4 ~ 5cm and added building block, and soil is laid on upper strata; Lower floor's laying depth is 10 ~ 20cm, and middle level laying depth is 20 ~ 30cm, and upper thickness is 30 ~ 50cm.
The construction process of domestic sewage of villages and small towns composite processing system of the present invention, its further technical scheme can also be select cash crop crop rotation in described vertical current constructed wetland, the spring and summer autumn selects wild rice stem, mater convolvulus, purslane to carry out crop rotation, winter then plants Sheep's-parsley, planting density 20 ~ 30 strains/m 2.
The construction process of domestic sewage of villages and small towns composite processing system of the present invention, its further technical scheme can also be described vertical current constructed wetland, distance below substrate upper surface 5cm arranges perforation water distributor, the caliber of described perforation water distributor is 10 ~ 30mm, small aperture 5 ~ l0mm, pitch-row 5 ~ 10cm; Bottom distance underlying substrate, 5cm arranges perforation header, and caliber is 10 ~ 30mm, small aperture 5 ~ l0mm, pitch-row 5 ~ 10cm, and water outlet flows into retention basin.
The invention has the beneficial effects as follows:
1, biological contact oxidation bed realizes automatic aeration, does not need mechanical aeration, saves power charge.
2, biological contact oxidation bed utilizes biomembrane process to purify waste water, and filler does not block, and sludge quantity is few.
3, biological contact oxidation bed adopts siphon Inlet and outlet water, does not have complicated mechanical means, can realize automatic control, without the need to personal management.
4, vertical current constructed wetland water inlet dissolved oxygen concentration is high, and biopurification is effective.Employing adds building block as matrix, can realize reinforced sewage dephosphorization.
5, artificial swamp plants economic crops, while purifying waste water, produce economic benefit.
Accompanying drawing explanation
Fig. 1 is multi-stage biological catalytic oxidation bed schematic diagram of the present invention;
In Fig. 1: 4-filler 5-vision slit 6-charge for remittance gallery 7-submersible pump 8-water storage tank stopped by 1-water inlet bar 2-siphon pipe 3-bed
Fig. 2 is the artificial swamp structural representation in the present invention.
2-1: perforation water distributor 2-2: perforation header 2-3: upper layer of soil 2-4: middle level adds building block 2-5: lower floor adds building block
Embodiment:
Domestic sewage of villages and small towns bio-ecological combination treatment process of the present invention, preferably specific embodiments is as shown in Figure 1 and Figure 2 for it:
Establish inlet chest from oxygenation biological contact oxidation bed top, in case, establish siphon pipe.Mei Jichuan bottom filling district all spreads the filler of 3 floor Φ 50mm, repaves the filler of 7 layers of Φ 25mm above, and media-filling rate is that every layer of catalytic oxidation bed two ends are crisscross arranged siphon pipe, and this layer of siphon rising pipe is lower floor's siphon inlet pipe.After sewage is promoted to inlet chest, when water level in water tank is higher than siphon pipe overhead height, siphon produces, and sewage enters first step biological contact oxidation bed.In bed, wastewater level rises, and exceeds water outlet siphon pipe top, and water outlet siphon is formed, and sewage enters second stage catalytic oxidation bed.When in this layer of bed, sewage is emptying, water outlet siphon disconnects.In every layer of bed, sewage is emptying and again have one period of anhydrous intermittent phase between water-filling, and this layer of filler can be exposed among air the short period of time, realizes air reaeration to a certain degree, and dissolved oxygen concentration in sewage is increased, for microbiological deterioration pollutent provides oxygen.After sewage enters lowest layer water storage tank, then be promoted to top-level cycle process through water circulating pump.When water inlet hydraulic load is 0.075 ~ 1.0m 3/ m 2d, hydraulic detention time is 6 ~ 10hr, and water outlet dissolved oxygen concentration is 3.8mg/L, meets the aerobic condition of pollutant aerobic biological degradation.Utilize this device process villages and small towns sewage not need mechanical oxygenation, can power consumption be saved.
After the process of multiple stage circulation biological contact oxidation bed, containing entering vertical current constructed wetland compared with the process water outlet of high-solubility oxygen concentration, dependence physics, chemistry, biological synergy are purified further.Artificial swamp adopts and adds building block as filler, improves dephosphorization efficiency by using.
Described vertical current constructed wetland, point upper, middle and lower-ranking, it is that 1.5cm adds building block that particle diameter can be laid by lower floor, and middle level is laid particle diameter 5cm and added building block, and soil is laid on upper strata.Lower floor's laying depth is 15cm, and middle level laying depth is 25cm, and upper thickness is 40cm.
Described artificial swamp, distance below substrate upper surface 5cm arranges perforation water distributor, and the caliber of described perforation water distributor is 20mm, small aperture 8mm, pitch-row 8cm.Bottom distance underlying substrate, 5cm arranges perforation header, and caliber is 20mm, small aperture 8mm, pitch-row 8cm, and water outlet flows into retention basin.Wetland selects cash crop crop rotation, spring and summer autumn crop rotation wild rice stem, mater convolvulus, purslane, and winter then plants Sheep's-parsley, planting density 25 strains/m 2, remove the pollutents such as the nitrogen phosphorus in sewage further.Certain economic benefit can be realized after crop harvesting.
Be former water with certain domestic sewage of villages and small towns, COD in former water crbe 168 ~ 336mg/L, NH 4 +-N is 16.84 ~ 33.80mg/L, TN be 28.6 ~ 61.5mg/L, TP is 1.80 ~ 5.83mg/L, and pH value is 6.24 ~ 8.55.Adopt 4 grades from oxygenation circulating biological catalytic oxidation bed, add building block artificial swamp plantation mater convolvulus.After process of the present invention, water outlet COD crbe less than 50mg/L, NH 4 +-N is less than 5.0mg/L, and TN is less than 15mg/L, and TP is less than 0.5mg/L, reaches " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) one-level A standard.

Claims (3)

1. a construction process for domestic sewage of villages and small towns composite processing system, is characterized in that:
Body processing system is from oxygenation multiple stage circulation biological contact oxidation bed and vertical current constructed wetland, domestic sewage of villages and small towns after collection, first through carrying out Aerobic biological process from oxygenation multiple stage circulation biological contact oxidation bed, enter vertical current constructed wetland again, purify waste water further under the synergy of plant, microorganism and matrix, wherein vertical current constructed wetland adopts and adds building block as matrix, reinforced phosphor-removing;
Wherein said adopts PVC floating stuffing from oxygenation multiple stage circulation biological contact oxidation bed, biological contact oxidation bed is according to sewage quality situation setting 3 ~ 5 grades, the every grade of height of bed 40 ~ 50cm, turnover water tank is established at every grade of bed two ends, adopt siphon pipe Inlet and outlet water, every grade of described oxidation bed bottom filling district all spreads the filler of 2 ~ 3 floor Φ 50mm, repaves the filler of 6 ~ 8 layers of Φ 25mm above, every layer of catalytic oxidation bed two ends are crisscross arranged siphon pipe, and this layer of siphon rising pipe is lower floor's siphon inlet pipe;
Described vertical current constructed wetland divides upper, middle and lower-ranking, lower floor and middle level lay different diameter, different thickness add building block as matrix with reinforced phosphor-removing, upper strata is soil matrix, and vertical current constructed wetland arranges perforation water distributor and perforation header system simultaneously; Described vertical current constructed wetland, distance overlayer matrix below upper surface 5cm arranges perforation water distributor, and the caliber of described perforation water distributor is 10 ~ 30mm, small aperture 5 ~ l0mm, pitch-row 5 ~ 10cm; Bottom distance underlying substrate, 5cm arranges perforation header, and caliber is 10 ~ 30mm, small aperture 5 ~ l0mm, pitch-row 5 ~ 10cm, and water outlet flows into retention basin.
2. the construction process of domestic sewage of villages and small towns composite processing system according to claim 1, it is characterized in that particle diameter is laid by described vertical current constructed wetland lower floor is that 1 ~ 2cm adds building block, and middle level is laid particle diameter 4 ~ 5cm and added building block, and soil is laid on upper strata; Lower floor's laying depth is 10 ~ 20cm, and middle level laying depth is 20 ~ 30cm, and upper thickness is 30 ~ 50cm.
3. the construction process of domestic sewage of villages and small towns composite processing system according to claim 2, it is characterized in that selecting cash crop crop rotation in described vertical current constructed wetland, the spring and summer autumn selects wild rice stem, mater convolvulus, purslane to carry out crop rotation, and winter then plants Sheep's-parsley, planting density 20 ~ 30 strains/m 2.
CN201310408928.9A 2013-09-10 2013-09-10 Construction method of rural domestic sewage combined treatment system Expired - Fee Related CN103449675B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050109183A (en) * 2004-05-14 2005-11-17 주식회사 에스디알앤디 Way and device to purify water of rivers, lake, runoff flow by using a combination of module style wetland infrastructure and contact oxidation·filtration facilities
CN1789175A (en) * 2005-12-19 2006-06-21 东南大学 Anoxia, drop aeration, artificial wetland combination type small-scale sewage dephosphorizing and denitrifying method
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