CN1247471C

CN1247471C - Method and apparatus for purifying and utilizing sewage for sustainable development type city

Info

Publication number: CN1247471C
Application number: CNB2004100390935A
Authority: CN
Inventors: 丁红心; 韩富刚
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-02-02
Filing date: 2004-02-02
Publication date: 2006-03-29
Anticipated expiration: 2024-02-02
Also published as: CN1557744A

Abstract

The present invention relates to a sustainable development type urban sewage purifying and utilizing method and a device thereof. In order to provide the sustainable development type urban sewage purifying method, firstly, solids are primarily recovered by the methods of filtration and precipitation; then, aquatic plants are harvested by the method of sewage growth, and the harvested aquatic plants are used as feedstuff or for biogas production; finally, the sewage is purified by passing through an artificial marshland in which the aquatic plants are planted. The present invention has the advantages of convenient implementation, low operation cost and good adaptability with urban development, can purify the sewage, fully utilizes nutrient substances in the sewage to benefit human being, improves the biological environment of cities and peripheral areas thereof, provides a great amount of non-drinking water for the cities, increases wetland environment which is important for biological variety and ecological balance to the cities, provides recreation water places for people in the cities, obtains environmental and social benefits and simultaneously bring considerable economical benefits to sewage developers, nicely supports the sustainable development of the cities and universe, and has wide popularization prospects.

Description

Sustainable development type urban sewage purification utilizes method and device thereof

Technical field

The present invention relates to the treatment technology of dirty waste water, particularly relate to a kind of Sustainable development type urban sewage purification and utilize method and device thereof.

Background technology

At present, the outstanding problem that exists is aspect water resources: tellurian most of effective Freshwater resources are consumed by the city, and the large amount of sewage that the city produces can not get purification utilization, and directly row causes serious day by day pollution of the sea to the ocean; The whole world most areas, particularly city are being faced with more and more severeer shortage of fresh water crisis; The Freshwater resources crisis causes a large amount of face of land fresh water waters surface to disappear; cause the species extinction of desertification and the existence of a large amount of dependence wetland and face extinction frequently; also cause simultaneously climatic deterioration; and caused huge infringement to agricultural, the eubiosis in the whole world has been caused many serious infringements irretrievable.As everyone knows, at China city and the rural water surface so clear that you can see the bottom that grows on trees, these waters surface have brought untold enjoyment and environmental benefit to people, are also bringing up the vital countless animal and plant resource of human survival before the 20-30; Now but because inappropriate Economic development mode, and make these disappear in a large number to the species diversity and the vital water surface of the eubiosis.

Now outstanding cost height, the defective that benefit is low of existing of the method for the treatment of city waste water of filtration, precipitation and the aeration type of widespread usage is very limited so apply.Therefore at present, a large amount of municipal effluents all is directly to discharge to peripheral water system, has caused very big environmental stress for peripheral water environment, has caused irremediable environmental pollution infringement also for simultaneously the water environment of internal drainage pattern and estuario.And municipal effluent just is its eutrophication to the main harm of water body, the many waterplant that can gather in the crops but have very high tolerance to the municipal effluent of eutrophication simultaneously, and can grow up strong and sturdy therein, can reduce its eutrophication level greatly by absorbing wherein nutrition.Be covered with the river course in the well-known city, the surrounding city environment marshy that distributes is the urban environment of optimum human living.And at present, the maximum environmental problem in most cities and ecological problem are exactly lack of water in the world, particularly lack the water surrounding that is beneficial to the eubiosis; Simultaneously but there is a large amount of municipal effluents to pour off in vain, not only can causes serious environmental to pollute, but also waste precious water resource; The city is the main consumer of earth Freshwater resources even more noteworthy, and city mass consumption Freshwater resources are the most important reason that cause earth water resources crisis.Therefore, to utilize problem again be the cardinal task that is concerning universe's survival and development in the purification that solves municipal effluent.

Summary of the invention

The objective of the invention is to overcome the above-mentioned defective of prior art, provide a kind of Sustainable development type urban sewage purification to utilize method, the invention still further relates to the device that is used to implement this method.

For achieving the above object, to utilize method be to utilize the waterplant of the convenient results of sewage plantation in Sustainable development type of the present invention urban sewage purification.The waterplant of convenient results can be Herba Eichhorniae, Scirpus tabernaemontani, cattail, water hyacinth, wild rice stem, Shui Lian, reed and high light efficiency rice grass etc.The effect that the water lotus has purifying water and absorbs nutrition and some metallic element in the water.Aquatic vascular plant: Scirpus tabernaemontani, wild rice stem, reed etc. have adaptability preferably.Originate in the growing environment that northern cattail marshy, Herba Eichhorniae more adapt to the north.Waterplant is compared with land plant, has easy breeding, and growth rapidly, the advantage that the unit surface biological yield is high, it is in the nutrition that can absorb in a large number in process of growth in the sewage, on the one hand, the effect of purifying waste water can be played, useful waterplant product can be obtained on the other hand.The economic worth of waterplant product can compensate the cost expenditure of sewage disposal preferably, under the prerequisite that the water resources after the purification and waterplant product are fully developed, the sewage disposal developer can obtain considerable commercial profit, be more convenient for comprehensive purification of municipal effluent utilizes again, helps to solve the water globe resource problem.What deserves to be explained is the cycling and reutilization that more helps the nutritive substance in the sewage by the nutritive substance in the waterplant absorption sewage simultaneously, help to optimize earth energy cycle and material and transform.Therefore, the purification reutilization technology of this municipal effluent has better economic, society and environmental benefit, meets very much human strategy of sustainable development requirement.

As optimization, the waterplant of convenient results is as feed or produce biogas.The waterplant product of results is used to produce biogas and is used as feed, and is not only simple and easy to do but also can obtain the better economic income; The waterplant product is used to produce biogas, can alleviate the pressure of fossil energy anxiety, can produce a kind of reproducible gas energy of rare cleaning again.Biogas slag, waterplant product can also be used to develop the Organic farming of surrounding city after crossing abdomen as feed, thereby more help Sustainable development.Biogas be used for the generating or with as the fuel gas supply city.Biogas can provide the reproducible gas energy of cleaning for the city continuously as the fuel gas supply city, helps to solve traditional fuel pollution problems in the city.Can provide flow dynamic with marsh gas power generation, strengthen the flowability of sewage, increase the aerator meeting of current, more help the thorough purification of healthy growth and the sewage of waterplant; Also can provide power in the city simultaneously, thereby more help fundamentally improving urban ecological environment for the current after purifying extensively distribute and flow.

As optimization, the water surface ovalize of the waterplant of the convenient results of plantation.The oval-shaped water surface helps making current uniform distribution on the water surface, thereby brings into play the ability that waterplant absorbs rich nutritive material in the sewage comprehensively, and land occupation as few as possible again can also be avoided the dead angle of local no current.Certainly, words with good conditionsi, filtering settling pond and artificial swampland also can adopt ellipse, equally also help the current equiblibrium mass distribution, improve decontamination effect improving.

As optimization, the waterplant of described convenient results comprises Herba Eichhorniae and rice grass.Herba Eichhorniae root system absorbing power is strong, nutrient in the energy enrichment water.Can be used as feed and compost, can be used for purifying domestic sewage and trade effluent.Herba Eichhorniae had both had stronger resistant outlet capacity, had higher biological yield again; The rice grass is high light efficiency four-carbon plant, has stronger energy for growth.This technical scheme had both helped sewage purification, helped obtaining more waterplant product again.

As optimization, before the waterplant of the convenient results of plantation, tentatively reclaim solids with filtration and sedimentary method earlier.The employing of this technical scheme more helps the thorough purification of healthy growth and the sewage of waterplant.

As optimization, also comprise at last and pass through kind of the step that the artificial swampland that is implanted with waterplant purifies.The preferred artificial mangrove forest of artificial vegetation marshy, mangrove forest has higher economic value on the one hand, has bio-diversity preferably benefit on the other hand again.Mangrove forest is to be grown in the torrid zone, subtropics, based on the coenosis of mangrove, is grown in and impacts in solonchak or the saliferous silty loam, is grown in seashore and bay.Aegiceras corniculatum in the mangrove can adapt to the growing environment of low salt.The most northern 32 degree that are distributed in, the most southern 42 degree that are distributed in.The stronger effect of purifying waste water is arranged.Mangrove forest has adaptability and popularizing application prospect more widely.Therefore, this artificial swampland can also increase the vital wetland area of human kind sustainable development when playing the effect of further purifying waste water, and safeguards the tellurian variation, improve urban environment, for urban human provides very rare amusement and recreation place.

As optimization, flow out marshy purify waste water again to feed back give between the city or the artificial network of waterways in the city circulation or circulate in circulation between the artificial network of waterways, city and the swampland or between the artificial network of waterways, city and biopurification pond, swampland; The used power that circulates is supplied with by the marsh gas power generation station.This technical scheme, can effectively replenish the city Freshwater resources on the one hand, gathered in the network of waterways, city, improve the atmospheric moisture in city, arid area, increase the secondary oxonium ion content in the city, water condition for the urban green space provides competent water, to make the city be clear water and greenery around, make the city become the water garden, thoroughly improve urban ecological environment, make the city become the place of optimum human living.In addition, with effusive water in the network of waterways, city again by the biopurification pond, artificial swampland refluxes, help dilute sewage, increase stream competence, the enhanced aeration cleaning action also helps to increase the oxygen level in the water, more helps making biopurification pond and artificial swampland to adapt to more animals and plants species existence.

The device that is used to implement the inventive method comprises the settling tank of being with filtering net, plants the biopurification pond of the waterplant that is implanted with convenient results, plants the artificial swampland that is implanted with waterplant.The waterplant of convenient results comprises Herba Eichhorniae and rice grass.Artificial vegetation marshy is environment and good in economic efficiency mangrove forest more preferably.The technical scheme on this " one ground, two ponds " has less investment, convenient enforcement, the advantage of the good and environmental benefit excellence of wastewater purifying efficiency.

As optimization, plant the biopurification pond of the waterplant that is implanted with convenient results and also further be furnished with methane-generating pit; Artificial treated water outlet marshy further connects the undrinkable water net in the city by pumping plant or further connects the artificial network of waterways in the city, the backwater of the artificial network of waterways flows into artificial swampland or artificial treated water outlet marshy again and further connects the artificial network of waterways in the city by pumping plant, the backwater of the artificial network of waterways flows into the biopurification pond again, and the biopurification pond flows into artificial swampland again.Methane-generating pit can provide very rare clean energy for the city, can satisfy the innoxious deep processing needs of a large amount of waterplant products well.Purified water taps into the water resources problems that then helps to solve the lack of water city into the undrinkable water net.Purify waste water in the biopurification pond, circulate between the artificial swampland and the artificial network of waterways, city, further the flowing and to play further cleaning action to water quality in the artificial network of waterways in the city of purifying waste water, artificial river in the city passes back into the biopurification pond again, artificial swampland can dilute the sewage that flows into from filtering settling pond again, thereby can alleviate the biopurification pond, the burden that artificial swampland is purified waste water, what is more important can make the artificial network of waterways of artificial swampland and city form a complete water system, prolong flow path, the ability that helps improving the self-purification capacity of water most and receive the digestion dirt.

As optimization, methane-generating pit further is furnished with the marsh gas power generation station, and the marsh gas power generation station provides power for pumping plant; The preferred artificial mangrove forest of described artificial vegetation marshy; One or more in described settling tank, biopurification pond and the artificial swampland are oval.The introducing at marsh gas power generation station helps the energy consumption issues that solves pumping plant, thereby can guarantee the long-time running of this urban sewage purification system.The preferred version of this artificial mangrove forest, the more important thing is that mangrove forest can adapt to the higher water quality of saliferous, because often contain more inorganic salt in the municipal effluent, mangrove forest also can be supported marshy bio-diversityly better in addition, and has relative higher economic value.The oval-shaped water surface helps the uniform distribution of current.The settling tank, biopurification pond of band filtering net, artificial swampland quantity can be a plurality of, identical tanks, between arrangement mode both can be series connection, also can be in parallel, can also be not only to connect but also in parallel; Concrete decoration form is decided with actual conditions as required.The minor axis of the oval water surface and the ratio of major axis be the ratio promptly 0.618 or its approximation of golden section more preferably, so design more help current uniform distribution, give full play to water surface effect and save the soil.

It should be noted that limnobios: planktonic organism, necton, bottom-dwelling, periphyton and pleuston all have the effect that purifies water and safeguard ecology in varying degrees.Though therefore the biopurification pond still artificial swampland can make full use of these beneficial organisms and carry out purification of water quality and improve the ecological environment.Green waterplant also has following environment protection effect: 1, purify air when playing purifying water quality: the balance that keeps the oxygen and carbon dioxide in the atmosphere.Reduce the concentration of obnoxious flavour in the atmosphere.Reduce airborne radioactive substance.Reduce koniology.2, purify waste water: 3, reduce noise.4, regulate the climate.Therefore, the enforcement of technical solution of the present invention can be at the ecotope that fundamentally improves city and surrounding area, and provides the strong environment support for the Sustainable development in city.

After adopting technique scheme, it is fully to use in the municipal effluent mode of rich nutritive material to dispose of sewage that Sustainable development type of the present invention urban sewage purification utilizes method, it is convenient to implement, running cost is low, good with the blending of urban development, can purify waste water, the nutritive substance that can make full use of again in the sewage is benefited for the mankind, can also improve the ecotope of city and surrounding area, for the city provides a large amount of convenient undrinkable water that uses through purifying, for increasing to the bio-diversity and vital wetland environment of the eubiosis and for urban human, the city provides amusement and recreation water place, particularly obtaining environment, in the time of social benefit, bring appreciable economic benefit can also for the municipal effluent developer, can support the city and the universe's Sustainable development preferably, have boundless promotion prospect.

Description of drawings

Fig. 1 is the FB(flow block) that Sustainable development type of the present invention urban sewage purification utilizes method;

Fig. 2 is the current synoptic diagram of the oval water surface;

Fig. 3 is the schematic representation of apparatus that is used to implement the inventive method.

Embodiment

Do further explanation below in conjunction with accompanying drawing and this example of tool:

As illustrated in fig. 1 and 2, it is after municipal effluent compiles that Sustainable development type of the present invention urban sewage purification utilizes method, tentatively reclaim solids with filtration and sedimentary method earlier, the method of using convenient waterplant of gathering in the crops such as plantation Herba Eichhorniae, rice grass again is except that the rich nutritive material in the decontaminated water, the last artificial swampland that is implanted with based on the waterplant of mangrove forest through kind more further purifies, and flows out artificial marshyly to purify waste water in the artificial network of waterways, city and biopurification pond again and manually circulate between the swampland.The waterplant product of biopurification pond results is used to produce biogas, and biogas is used for generating and supplies with combustion gas to the city, and the electric energy that biogas produces is used to provide flow dynamic.Artificial swampland also is used to promote a tourist business.The water surface and the artificial swampland of the waterplant of convenience results such as the filtration and the sedimentary water surface, plantation Herba Eichhorniae all adopt ellipse.

Shown in Fig. 2 and 3, the device that is used to implement the inventive method comprises the oval settling tank 2 that compiles mouthful 1 band filtering net that links to each other with municipal effluent, the kind that links to each other with settling tank 2 is implanted with Herba Eichhorniae, the oval biopurification pond 3 of the waterplant of convenient results such as rice grass, the kind that links to each other with biopurification pond 3 is implanted with the oval artificial swampland 4 that mangrove forest is master's a waterplant, the outlet of artificial swampland 4 links to each other with the inlet of the artificial network of waterways 5 in the city, and the outlet of the artificial network of waterways 5 links to each other with the inlet in biopurification pond 3 again in the city, the outlet in biopurification pond 3 links to each other with the inlet of artificial swampland 4 again.Biopurification pond 3 is furnished with methane-generating pit 6, and methane-generating pit 6 is furnished with biogas storage tank 7 and marsh gas power generation station 8, and biogas storage tank 7 also links to each other with the gas pipeline 9 in city.Between the artificial network of waterways 5 of outlet and city of artificial swampland 4, be provided with the pumping plant 10 that power is provided by marsh gas power generation station 8.The major axis of each oval water surface all is 5/3 with the ratio of minor axis.

Claims

1, a kind of Sustainable development type urban sewage purification utilizes method, it is characterized in that tentatively reclaiming solids with filtration and sedimentary method earlier, utilize the waterplant of the convenient results of sewage plantation again, the waterplant of convenient results is as feed or produce biogas, it is characterized in that the waterplant of described convenient results comprises Herba Eichhorniae and rice grass; Comprise also that at last through the artificial mangrove forest of plantation be the step that main artificial swampland purifies; Flow out marshy purify waste water all to be between oval-shaped biopurification pond that water (flow) direction is extended, swampland at the artificial network of waterways, city and the water surface circulate.

2, Sustainable development type according to claim 2 urban sewage purification utilizes method, it is characterized in that the major axis of the oval water surface and minor axis ratio are 5/3.

3, be used to implement the device of the inventive method, it is characterized in that comprising the settling tank of being with filtering net, plant the biopurification pond of the waterplant that comprises Herba Eichhorniae and rice grass that is implanted with convenient results, planting and being implanted with artificial mangrove forest is main artificial swampland; The biopurification pond also further is furnished with methane-generating pit; Further by the artificial network of waterways in the pumping plant connection city, the backwater of the artificial network of waterways flows into the biopurification pond to artificial treated water outlet marshy again, and the biopurification pond flows into artificial swampland again; Methane-generating pit further is furnished with the marsh gas power generation station, and the marsh gas power generation station provides power for pumping plant; Described settling tank, biopurification pond and artificial swampland all are the ellipses that extends along water (flow) direction.

4,, it is characterized in that the major axis of the oval water surface and minor axis ratio are 5/3 according to the described device of claim 3.