CN101164924A - Countryside sewage treatment equipment and application - Google Patents

Countryside sewage treatment equipment and application Download PDF

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Publication number
CN101164924A
CN101164924A CNA2007100715184A CN200710071518A CN101164924A CN 101164924 A CN101164924 A CN 101164924A CN A2007100715184 A CNA2007100715184 A CN A2007100715184A CN 200710071518 A CN200710071518 A CN 200710071518A CN 101164924 A CN101164924 A CN 101164924A
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China
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water
sewage
filter layer
filtration
capillary infiltration
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CNA2007100715184A
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孙培德
郭茂新
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Zhejiang Gongshang University
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Zhejiang Gongshang University
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Priority to CNA2007100715184A priority Critical patent/CN101164924A/en
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

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  • Treatment Of Biological Wastes In General (AREA)
  • Biological Treatment Of Waste Water (AREA)

Abstract

This invention discloses the installation for treating waste-water from rural area, and its application. It is composed of: facultative contact oxidation system, sludge/water separation equipment and capillary percolation filtration ditch. In said oxidation system placed are PP balls as packings, aeration tubes being distributed under said packing. Said filtration system comprises: the water distribution tubes, the upper filtration layer, the lower sands layers. The filtration layer contains soil from local earth and stove ash in the a ratio of 2:1, the thickness being 0.4-0.6m. The sands layer contains sands which grain size is 0.5-2mm, the thickness being 0.3-0.4m. Above the filtration layer placed are water distribution tubes. Between the two layers is permeable nonwoven fabrics. The wastewater, after being pretreatment, sludge separation, enters the filtration ditch, proceeds: water distribution, absorption, filtration to be drained, which meets the national standards.

Description

Countryside sewage treatment equipment and application
Technical field
The invention belongs to environmental protection technical field, relate to waste water treatment, resource recycling technology, be specially a kind of treatment unit of country sewage and the method for use.
Background technology
Along with Chinese economic development, rural area samll cities and towns tendency becomes clear day by day, and country sewage has become another severe contamination source that is only second to municipal effluent.Owing to the rural area source of pollution disperse and wide, sewage quantity is few, limited fund, reason such as lack qualified technical personnel, the harmless treatment rate of country sewage is very low.Rural area people and animals' combined sewage is carried out harmless treatment and recycling, is the basic demand of modern civilization, has become the environmental issue of paying close attention in the construction of rural ecological village.
Country sewage comprises human and animal excreta sewage, kitchen washes and small business's factory effluent.Water displacement is little, good biodegradability, and general at present employing marsh gas purifying is handled, and combines with " change cupboard, change the lavatory, change circle ", reaches the dual purpose of energy-conservation pollution treatment and biogas, natural pond liquid, natural pond slag recycling." non-energy-dissipating type " biological treatment that adopts often builds up concrete structures, generally adopts buried unpowered sewage treatment unit, be characterized in the entire treatment facility place underground, the technology operation is not consumed energy, convenient management, sludge quantity are few.Facts have proved that this kind processing device only can not selected for use when the draining water quality requirement is high.
In recent years, the artificial swamp technical finesse country sewage that utilizes the ecological engineering principle to grow up presents certain development trend.Utilize land resources and ecotechnology, build some small-sized ecological sewage treatment systems, form certain plant, soil, microorganism, water complex ecosystem with effective disposal sewage.Mainly contain wet land treating system, land percolation treatment system, Biostatic pool treatment system etc.Built up up-to-date waste water subsurface wastewater infiltration system in the rural area of China's west and south Dianchi Lake Basin, mainly the mixed soil of being made up of the cinder of laterite and 25% is filled, and is used for the processing of Rural Waste Water.TIEHENG adopts subsurface wastewater infiltration system that sanitary sewage disposal is studied.This system mainly comprises precipitation, land percolation, microbial film process, its COD, BOD 5, SS and ammonia nitrogen removal frank can reach 92.6%, 97.6%, 86.8% and 81.72% respectively.The polluted water land filtration system makes full use of the soil capillary transudation, the organic pollutant in the physics in the dependence soil, chemistry, the biological action degradation of sewage.But the concentration of wastewater that enters the land percolation system is unsuitable too high.And China's emphasis on development rural economy, the encourage growth village industry, so country sewage water quality composition complexity, the amount of discharging pollutants are bigger, sewage needs through necessary pre-treatment before entering the land percolation system.
Summary of the invention
The objective of the invention is incorporate treatment unit to be set, and the using method of this device is provided at containing small business's factory effluent, the higher relatively country sewage of water pollutant concentration, the water outlet of handling by the present invention can be used as landscape water.
Countryside sewage treatment equipment of the present invention, the COD of handled country sewage are 300～400mg/L, and BOD150～200mg/L, ammonia nitrogen concentration are below the 35mg/L, and total phosphorus concentration is below the 2.8mg/L, and pH is 6～9.Described waste disposal plant is by the double oxygen catalytic oxidation system, the device for separating mud and water that are arranged on the face of land and be arranged on subterranean capillary infiltration trench combined system and form; The Ball-type packing that the built-in polypropylene material of described double oxygen catalytic oxidation system is made is divided into aeration tube; Described device for separating mud and water is settling bath, is connected to hold concurrently between oxygen catalytic oxidation system and the capillary infiltration trench combined system; The composition of described capillary infiltration system comprises water distributor, upper strata filter layer and lower floor's sandy gravel stratum.
The upper strata filter layer of described capillary infiltration trench combined system is formulated with the local soil of sewage disposal and lime-ash 2: 1 by volume, and thickness is 0.4～0.6m; Lower floor's sandy gravel stratum is that the coarse sand of 0.5～2mm is formed by particle diameter, and thickness is 0.3～0.4m; Lay water distributor on the filter layer and form many diafiltration ditches, the non-woven fabrics sealing coat of porous is set between filter layer and sandy gravel stratum.
The application of above-mentioned countryside sewage treatment equipment may further comprise the steps:
(1) treatment sewage pumps into the oxygen contact-oxidation pool of holding concurrently and carries out pre-treatment, and dissolved oxygen concentration is controlled at 0.5mg/L in the preprocessing process, handles 24 hours;
(2) pretreated water outlet inflow device for separating mud and water carries out mud-water separation, and the water outlet after the clarification pumps into the capillary infiltration trench combined system again;
(3) the above-mentioned water outlet that pumps into after the adsorptive percolation through the upper strata filter layer, by the non-woven fabrics sealing coat of porous, leaches after the distribution again of process grit layer and the absorption through water distributor diafiltration ditch water distribution more again.
The present invention program is further described below:
The present invention is actually a double oxygen catalytic oxidation-land percolation trench system composite wastewater treatment technology, is made up of double oxygen catalytic oxidation pretreatment system for sewage, land percolation ditch Sewage treatment systems two portions.
1. the oxygen catalytic oxidation pretreatment system for sewage of holding concurrently can be used for the pre-treatment before sewage enters subsequent treatment process.At 24h, dissolved oxygen concentration is controlled under the condition of 0.5mg/L, utilizes the filler in the system effectively to reduce organic content, and water outlet COD is reduced to about 100mg/L, reaches the pre-treatment purpose by the control hydraulic detention time.At the different quality situation, can select operation scheme such as unpowered or microkinetic flexibly by switching.
Through pretreated sewage by pipe-line transportation to the soil filtration system.Under water distribution system control, sewage is assigned in every diafiltration ditch through water distributor.Sewage by after the filter layer adsorptive percolation of upper strata, by the non-woven fabrics sealing coat of porous, leaches after the distribution again of process grit layer and the absorption in the diafiltration ditch again.
The present invention is arranged on subterranean capillary infiltration trench combined system turf plant plant thereon, part of contaminated water at the upper strata filter layer rises to the roots of plants district under the soil wicking action, obtain after biochemical action of physics, chemical action and the microorganism of process soil and the plant absorbing utilization handling and purifying.
Most of sewage by after the filter layer adsorptive percolation of upper strata, by the non-woven fabrics sealing coat of porous, leaches after the distribution again of process grit layer and the absorption in the diafiltration ditch again.
Because the soil of diafiltration ditch formulated is formulated with the local soil of sewage disposal and lime-ash 2: 1 by volume, thickness is 0.4～0.6m; Have ideal soil machine matter and form, organic content is abundant, so the crumb structure prosperity of soil, the infiltration rate height, and wicking action is strong, and loading capacity is big, and permeability is better.Simultaneously, be rich in necessary nutrition of microorganism and energy substance in the soil, Shi Yi soil property provides good existence developing environment for soil microorganisms in addition, so soil has higher biological activity.By detention be adsorbed on organic pollutant in the soil under action of microorganisms, being decomposed through biochemical reaction changes into inorganics, and this is a critical process of removing organic pollutant.After the adsorptive percolation of sewage through the upper strata filter layer,, leach after the distribution again of process sandy gravel stratum and the absorption again by the non-woven fabrics sealing coat of porous.
Lawn plant also is the important channel of sewage purification to the absorption of nutritive element.Nitrogen in the sewage, phosphorus etc. are absorbed and used by root system of plant as the necessary for plant growth nutrient, be moved out of system and reach the purpose that removes when mowing.The frequent removal amount that can make nutritive element that cuts the grass on a lawn reaches maximum.
The double oxygen catalytic oxidation-land percolation system synthesis sewage disposal technology of two system combined formation can be stablized realization sewage high standard processing intent, reinforcement is to the restoration of the ecosystem of landscape water body, realize effective utilization of regenerated water source, at utmost reduce system energy consumption and operational and administrative expenses.
Reuse index of the present invention is:
(1) the reusing sewage rate is greater than 60%;
(2) the recycling processing system treat effluent reaches the water quality standard of table 1.
Table 1 recycling processing system treat effluent standard
Index Scope
pH CODC r BOD 5 SS 6～9 ＜50mg/L ＜10mg/L ＜3mg/L
The disposal field is the planning land use for greening.Make full use of ecology, natural type technology, traditional technology is combined with novel process, make great efforts to reach the technology and the economic optimization of sewage disposal, pay attention to developing from the improvement and the comprehensive utilization of resources direction of single processing to integrated environment.
Description of drawings
Fig. 1 sewage water treatment method schema.
Fig. 2 is arranged on the double oxygen catalytic oxidation system and device synoptic diagram on the face of land.
Fig. 3 is arranged on subterranean capillary infiltration trench system device synoptic diagram.
Among the figure: 1, water leg; 2, pump; 3, double oxygen contact-oxidation pool; 4, Ball-type packing; 5, aeration tube; 6, device for separating mud and water; 7, water distributor; 8, filter layer; 9, non-woven fabrics sealing coat; 10, grit layer
Embodiment
Embodiment 1: country sewage contact oxidation method experimental pretreatment
Rural area composite wastewater water inlet (former water) water quality sees Table 2.
Table 2 raw water quality situation
Index COD(mg/L) BOD 5/(mg/L) Ammonia nitrogen/(mg/L) Total phosphorus/(mg/L) pH
Scope 300～400 150～200 35 2.8 6.0～9.0
The catalytic oxidation experimental installation is made up of the contact-oxidation pool and the second pond of microkinetic, and synthetic glass is made, and effective dimensions is 0.30m * 0.30m * 0.50m, the built-in Ball-type packing of making by polypropylene material, diameter is 100mm, limited aeration, and the control dissolved oxygen is less than 0.5mg/L.
At the water inlet COD of the oxygen catalytic oxidation system of holding concurrently during at 300～400mg/L, hydraulic detention time is that the water outlet COD of 12h is about 150mg/L; Hydraulic detention time be the water outlet COD of 24h less than 120mg/L, system is about 75% to the clearance of COD.
Embodiment 2: the soil capillary infiltration is handled experiment
Soil capillary infiltration experimental installation is made by PVC, and effective dimensions is 0.40m * 0.60m * 0.60m; Filtration system is made up of following 3 parts: 1, the water distribution layer that water distributor forms many diafiltration ditches is laid on the upper strata, 2, lower floor's filter layer is the special soil layer of human configuration, formulated with the mixed a certain proportion of lime-ash of the local soil of project demonstration pilot project 2: 1 by volume, thickness is 0.4～0.6m, is the main active layer that sewage is purified.3, sandy gravel stratum is that the coarse sand of 0.5～2.0mm is formed by particle diameter, plays the support filter layer and makes the equally distributed effect of sewage, and the non-woven fabrics that porous is set between filter layer and sandy gravel stratum is isolated.To prevent that upper layer of soil from falling to inserting sandy gravel stratum, destroys water distribution uniformity.
This filtration system is arranged on underground, and the top layer is the local cultivated soil of planting, for the lawn plant growth.
The water inlet COD of land percolation system is at 93～124mg/L, and hydraulic load is 0.03m 3/ (m 2D) water outlet COD is about 60mg/L; Hydraulic load is 0.02m 3/ (m 2D) water outlet COD is less than 50mg/L, system to the clearance of COD greater than 60%.
Embodiment 3: country sewage is handled example
In this example, countryside sewage treatment equipment is applied to the modern new rural area of market town type, and such country sewage water yield is big, the sewage complicated component, has generally included sanitary sewage, trade effluent two portions.
(1) sewage source and water yield analysis
This village's sewage source mainly contains in the territory, village trade effluent two portions in the sanitary sewage and industry park, and total release is about 546g/d.
Table 3 sewage water balance table
Project Units of Account Basis Sewage quantity
Sanitary sewage 3000 people 110L/d. people 330t/d
Crowd massing districts such as school 1500 people 40L/d. people 60t/d
Trade effluent Large-scale silk weaving enterprise 7 families 6g/d 42t/d
Medium-sized silk weaving enterprise 15 families 4g/d 60t/d
Small-sized silk weaving enterprise 12 families 2t/d 24t/d
Other type of production enterprises 3 families 10t/d 30t/d
Total amount of sewage discharge adds up to 546t/d
(2) designing treatment ability
According to these village's expanding economy needs, discharged volume of industrial waste water will constantly increase, and consider that treatment facility holds the ability of part rainwater received, so the design system sewage treatment capacity is 1000t/d.Consider the safety of system when meeting with heavy or torrential rain, system design surmounts direct discharging facility, has so both guaranteed the safety of treatment system, has also reduced the direct discharging of rain dirt simultaneously as much as possible.
(3) water inlet sewage quality analysis
Table 4 sewage quality is analyzed schedule of quantities
The water sample source COD Cr(mg/L) BOD 5(mg/L) SS(mg/L)
Sanitary sewage 1 420 223 165
Sanitary sewage 2 405 241 173
Industrial sewage 1. 630 333 95
Combined sewage 2. 525 287 125
The inland river river 126 71 55
Illustrate: 1.: be lower than the river water surface because of row's mouth, so the industrial sewage sample is taken near row's mouthful river;
2.: combined sewage is by sanitary sewage 1, and sanitary sewage 2 and industrial sewage get according to 1: 1: 2 ratio laboratory uniform mixing.
3.: behind sewage mixing rainwater, sewage obtains dilution, and more above-mentioned " combined sewage " water-quality guideline can decrease, and water-quality guideline can reduce by 50% in theory.
Technological design
(1) water collecting basin
Function declaration: balanced sewage quality, the water yield;
Design variable: cubic capacity 518m 3, 8 hours residence time of design, useful volume 350m 3
Building structure: underground type, stone block building;
Equipment is provided with: 2 of sewage pumps, and 1 opens 1 is equipped with 2 of supporting grids;
(2) device of double oxygen catalytic oxidation pretreatment system
The a oxygen contact-oxidation pool of holding concurrently
Function declaration: biochemical decomposing organic matter;
Design variable: cubic capacity 1536m 324 hours residence time;
Equipment is provided with: Ball-type packing 1160m 3, complete filler support 12 covers, aerator is 3 under water;
The b device for separating mud and water
Function declaration: solid-liquid separation, sludge settling;
Design variable: cubic capacity 230.4m 35 hours residence time, useful volume 320m 3Size 16mL * 2.5mB * 4mH * 2 lattice;
Equipment configuration: 3 of sludge pumps;
(3) capillary infiltration trench system device
Function declaration: the soil sanitation effect is disposed of sewage;
Design variable: total area 1500m 2, design underground, and its earth surface planting lawn plant.
Building structure: artificial Seepage control structure ditch;
Equipment configuration: special soil layer and water distribution system.
The treatment unit process practical application of the country sewage of above-mentioned design, 546 tons in co-processing sewage, water outlet reaches standard and sees table 5 for details.
Table 5 sewage disposal unit effluent quality index table
The processing unit title The employing standard COD Cr(mg/L) BOD 5(mg/L) SS (mg/L)
Double oxygen catalytic oxidation pretreatment system Sewage comprehensive discharge one-level B mark 1. 60 20 20
Capillary infiltration trench system The reuse water standard 2. 50 10 5
Illustrate: 1.: sewage comprehensive discharge one-level B mark standard adopts relevant regulations among " urban wastewater treatment firm pollutant emission standard " GB18918-2002; 2.: the quality of reused water standard be according to China's " reusing sewage design specifications proposed standard " (CECS-61:94), " miscellaneous domestic water quality standard " (CJ25.1-89), and determine in conjunction with domestic and international other urban sewage recycling water quality standard.

Claims (3)

1. countryside sewage treatment equipment, the COD of described country sewage is 300～400mg/L, BOD150～200mg/L, ammonia nitrogen concentration is below the 35mg/L, total phosphorus concentration is below the 2.8mg/L, pH is 6～9, it is characterized in that: described waste disposal plant is by the double oxygen catalytic oxidation system, the device for separating mud and water that are arranged on the face of land and be arranged on subterranean capillary infiltration trench combined system and form; The Ball-type packing that the built-in polypropylene material of described double oxygen catalytic oxidation system is made is divided into aeration tube; Described device for separating mud and water is settling bath, is connected to hold concurrently between oxygen catalytic oxidation system and the capillary infiltration trench combined system; The composition of described capillary infiltration system comprises water distributor, upper strata filter layer and lower floor's sandy gravel stratum.
2. countryside sewage treatment equipment according to claim 1 is characterized in that: the upper strata filter layer of described capillary infiltration trench combined system is formulated with the local soil of sewage disposal and lime-ash 2: 1 by volume, and thickness is 0.4～0.6m; Lower floor's sandy gravel stratum is that the coarse sand of 0.5～2mm is formed by particle diameter, and thickness is 0.3～0.4m; Lay water distributor on the filter layer and form many diafiltration ditches, the non-woven fabrics sealing coat of porous is set between filter layer and sandy gravel stratum.
3. the application of countryside sewage treatment equipment according to claim 1 is characterized in that following steps:
(1) treatment sewage pumps into the oxygen contact-oxidation pool of holding concurrently and carries out pre-treatment, and dissolved oxygen concentration is controlled at 0.5mg/L in the preprocessing process, handles 24 hours;
(2) pretreated water outlet inflow device for separating mud and water carries out mud-water separation, and the water outlet after the clarification pumps into the capillary infiltration trench combined system again;
(2) the above-mentioned water outlet that pumps into after the adsorptive percolation through the upper strata filter layer, by the non-woven fabrics sealing coat of porous, leaches after the distribution again of process sandy gravel stratum and the absorption through water distributor diafiltration ditch water distribution more again.
CNA2007100715184A 2007-09-21 2007-09-21 Countryside sewage treatment equipment and application Pending CN101164924A (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101456653B (en) * 2009-01-05 2010-09-22 北京大学 Device of individual type sewage drainage ecological treatment and method thereof
CN101503265B (en) * 2009-01-14 2012-09-05 成都城市河流研究会 Constructed wetland processing and comprehensive utilization technique for farm household sewage water and rainwater
CN103721569A (en) * 2014-01-03 2014-04-16 曾永刚 Ultra-filtration device for rural domestic wastewater
CN103896418A (en) * 2014-04-09 2014-07-02 西南大学 Draw box type wastewater purification system and use method thereof
CN104496110A (en) * 2014-12-04 2015-04-08 北京建筑大学 Soil percolation device
CN106964180A (en) * 2017-05-04 2017-07-21 台州学院 A kind of Quick percolation apparatus of mud-water separation
CN107153395A (en) * 2016-03-02 2017-09-12 百米马（天津）有限公司 A kind of single household joint household is collected, specialization is transported, portable multiple spot CTM-BMM tupes
CN111499090A (en) * 2020-03-31 2020-08-07 安徽国祯环保节能科技股份有限公司 Rural household sewage treatment device and treatment method thereof
CN115180775A (en) * 2022-08-02 2022-10-14 陕西地建土地工程技术研究院有限责任公司 Low-load villages and small towns sewage rainwater flow distribution treatment system

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101456653B (en) * 2009-01-05 2010-09-22 北京大学 Device of individual type sewage drainage ecological treatment and method thereof
CN101503265B (en) * 2009-01-14 2012-09-05 成都城市河流研究会 Constructed wetland processing and comprehensive utilization technique for farm household sewage water and rainwater
CN103721569B (en) * 2014-01-03 2017-03-08 成都大学 A kind of Ultra-filtration device for rural domestic wastewater
CN103721569A (en) * 2014-01-03 2014-04-16 曾永刚 Ultra-filtration device for rural domestic wastewater
CN103896418A (en) * 2014-04-09 2014-07-02 西南大学 Draw box type wastewater purification system and use method thereof
CN103896418B (en) * 2014-04-09 2016-01-06 西南大学 One takes out box type sewage purification system and using method thereof
CN104496110A (en) * 2014-12-04 2015-04-08 北京建筑大学 Soil percolation device
CN107153395A (en) * 2016-03-02 2017-09-12 百米马（天津）有限公司 A kind of single household joint household is collected, specialization is transported, portable multiple spot CTM-BMM tupes
CN107153395B (en) * 2016-03-02 2020-06-19 百米马（天津）有限公司 Single-family joint collection, specialized transportation and mobile multipoint CTM-BMM processing method
CN106964180A (en) * 2017-05-04 2017-07-21 台州学院 A kind of Quick percolation apparatus of mud-water separation
CN106964180B (en) * 2017-05-04 2022-04-12 台州学院 Rapid infiltration device for separating mud from water
CN111499090A (en) * 2020-03-31 2020-08-07 安徽国祯环保节能科技股份有限公司 Rural household sewage treatment device and treatment method thereof
CN115180775A (en) * 2022-08-02 2022-10-14 陕西地建土地工程技术研究院有限责任公司 Low-load villages and small towns sewage rainwater flow distribution treatment system

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