44results about How to "Restoring ecological functions" patented technology

The invention discloses a heavy metal passivator for vegetable field soil. The components of the heavy metal passivator comprise burnt lime, organic fertilizer for heavy metal removal and expanded perlite. The selected expanded perlite has the particle diameter ranging from 0.5 to 1.5cm preferentially. The heavy metal passivator for vegetable field soil provided by the invention passivate heavy metals, which mainly include plumbum, cadimium, chrome, copper, zinc, and the like, causing mild contamination in the vegetable field soil so that safe vegetable products can be produced on the soil slightly contaminated, the ecological function and industry function of the vegetable field soil can be recovered; therefore, the quality and the merchantability of the vegetables are improved. The materials selected for the invention are all common and easy to prepare and have low cost, which is convenient for being popularized. Experiments prove that the heavy metal passivator has extremely remarkable passivation effect on heavy metals as well as has very favorable ecological and economic benefits.

The invention provides a three-dimensional floating bed for purification of black and odorous rivers and a building method for the three-dimensional floating bed. A fence formed by PVC pipes and polyvinyl net is divided from top to bottom into an upper layer of floating plant growing region, a middle layer of artificial medium region and a lower layer of artificial medium region, wherein water plants with relatively developed root systems are planted on the upper layer; a biological membrane is formed on the middle layer by hanging pieces with rough surfaces and acts together with the root region of the plants on the upper layer, and organic substances are decomposed by oxygen generated by the plants; floating filler net is hung on the lower layer, and is filled with anaerobic bacteria according to different forming reasons of the black and odorous rivers, wherein the anaerobic bacteria are attached to an artificial hanging membrane, and domesticated to achieve high tolerance and degradation capability to pollutants. The three-dimensional floating bed provided by the invention has the advantages as follows: the manufacturing method of the floating bed is simple and convenient, the cost is lower, and the three-dimensional floating bed has an enhanced improvement effect on black and odorous rivers with high pollutant burdens.

The invention relates to a soil heavy metal pollution treatment technology, and concretely relates to a soil heavy metal deactivator, and a method using the soil heavy metal deactivator to deactivate and repair soil heavy metal pollution. The soil heavy metal deactivator comprises, by weight, 30 parts of peanut shells, 15 parts of red pine needles, 10 parts of sepiolite, 10 parts of fly ash, 5 parts of chitin, 3 parts of sodium metasilicate pentahydrate, 0.4 part of sodium tripolyphosphate, 0.1 part of choline chloride, 1.2 parts of a microbial inoculum and 0.05 part of quicklime. The soil heavy metal deactivator can effectively reduce the heavy metal content of plants to achieve the deactivation and repairing purposes.

The invention relates to a riverway bypass water purification wetland system. The system comprises a drainage water purification section, a circuitous water purification section and a drainage water purification section which are sequentially communicated, wherein a water outlet of the drainage water purification section is communicated with the main river channel; the drainage water purificationsection comprises a drainage channel communicating a water inlet and the main river channel, gravels laid in the drainage channel, and gravel tumbling weirs and a plurality of first spur dikes which are sequentially distributed in the water flow direction; the first spur dikes are sequentially arranged on the two sides of the drainage channel in a staggered mode to form a snake-mouth-shaped firstpurified water channel, and the heads of the first spur dikes are obliquely arranged in the water flow direction. Sewage of the riverway sequentially flows into the circuitous water purification section and the drainage water purification section to be purified through water flow purified by the drainage water purification section and then flows into the main riverway again, multi-stage circuitousoperation is completed, and the riverway water quality purification effect is improved; and the plurality of first spur dikes form a snake-mouth-shaped first water purification channel with small circuitous water flow, so that the flow velocity can be reduced, the reflux is reduced, the contact time of water and a substrate is prolonged, the water dissolved oxygen is increased, and the river water purification effect is further improved.

The invention provides a hexavalent chromium contaminated soil remediation agent. The remediation agent comprises the following raw materials in parts by mass: 24-25 parts of a tea polyphenol extract,8-9 parts of a trivalent iron reagent and 1 part of polyvinyl alcohol. The invention also provides a preparation method of the hexavalent chromium contaminated soil remediation agent. The method comprises the following steps: weighing the trivalent iron agent, and stirring and dissolving the agent in pure water to obtain a ferric iron solution; weighing the tea polyphenol extract, and stirring and dissolving the extract in pure water to obtain a tea polyphenol solution; weighing and dissolving polyvinyl alcohol in pure water to obtain a polyvinyl alcohol solution; dropwise adding the tea polyphenol solution to the prepared ferric iron solution during stirring to enable the tea polyphenol solution and the ferric iron solution to be subjected to sufficient reaction, and dropwise adding thepolyvinyl alcohol solution to obtain the hexavalent chromium contaminated soil remediation agent after sufficient reaction of the tea polyphenol solution and the ferric iron solution. After the prepared soil remediation agent is used for remediating soil, the pH value of soil is restored from strong alkalinity to neutrality, the proportion of organic carbon content of soil is increased, and the soil structure and fertility are improved.

The invention discloses a compound river channel system. The system comprises a main river channel, revetments disposed on both sides of the main river channel and at least one twisty and different-depth ecological river channel in the water flow direction built in the main river channel. The ecological river channel meets the conditions that in the flat water period and the dry water period, theflow rate of the river main stream is greater than or equal to 0.5 m/s. The compound river channel system has a great improvement on water quality, and can upgrade the main nutrient salt indexes of the water quality, such as ammonia nitrogen, total nitrogen, total phosphorus and the like, from inferior V to near class IV and above; the river channel can store water in the flat water period and thedry water period and conduct flood discharge during the rainy season to enhance the flood control capacity of the river.

The invention discloses a culture method of a fungicide for water purification. The method comprises the following steps: taking target water of water to be restored; mixing 60-70wt% of the target water, 20-25wt% of a microbial nutrition agent and 10-20wt% of a microbial inoculum through first mixing the target water with the microbial nutrition agent, then adjusting the pH value of the obtained mixed solution to be same to the pH value of restored water, and finally adding the microbial inoculum; and carrying out aeration oxygenation on the mixed solution 2-3 times every day for 3-5d to keep the concentration of dissolved oxygen to be 2-3mg/L, reducing the concentration of the dissolved oxygen to the concentration of the dissolved oxygen in the restored water when the concentration of florae reaches 10<2>-10<3>/mL, and completing the method when the concentration of the florae reaches 10<5>-10<6>/mL. Compared with like products in the prior art, the fungicide cultured through the method has the advantages of good adaptability, good practical sewage biological treatment effect and low cost.

The invention discloses a system and method for treating black and odorous stagnant water, and belongs to the technical field of water restoration. The system comprises a mixing zone, an anoxic zone, an aerobic zone, a stabilizing zone, enclosures and a backflow pipeline. The enclosures include the enclosure I, the enclosure II and the enclosure III and divide a riverway into the mixing zone, the anoxic zone, the aerobic zone and the stabilizing zone in sequence in the water flow direction, the mixing zone and the anoxic zone are separated through the enclosure I, the anoxic zone and the aerobic zone are separated through the enclosure II, the aerobic zone and the stabilizing zone are separated through the enclosure III, and the stabilizing zone and the mixing zone are connected through the backflow pipeline. The stabilizing zone is used for stabilizing water quality and enabling bottom backflow liquid to flow back to the mixing zone. The system has the advantages of being strong in pollutant removal pertinence and high in removal efficiency, fully guarantees the improvement of the circulating and self-purifying capabilities of the water and the restoration of the ecological function of the water and also has the advantages of being capable of reducing investment and good in operating effect.

The invention discloses a water treatment method. The water treatment method comprises the following step of mixing a sea alga extract with a water body, wherein the sea algae extract is a solid mixture which is extracted by carrying out physical treatment and/or chemical treatment on sea algae; the physical treatment comprises the following steps of chopping, grinding and drying; the chemical treatment comprises the following steps of extracting, neutralizing, oxidizing and adsorbing; the sea algae contains at least one of kelps, sea-tangles, phaeophyta, sargassum, fucus vesiculosis, nori and agars. The sea alga extract and the water body are mixed so as to supply nutrition to microorganisms in the water body; the metabolism speed of corresponding specific flora in a water environment can be effectively improved and the growth is promoted; the rapid propagation of the specific flora snatch limited nutrient substances in the water body so as to inhibit the growth of other floras or algae to inhibit the relative harmful biological accumulation and improve the self purification capability of the water body.

The invention relates to a method for improving grassland productivity on the basis of a livestock-poultry-pasture coupling mode. The method includes the following steps that deteriorated grassland with the vegetation coverage degree not higher than 50% or grassland with the grasshopper density being 10 grasshoppers per square meter or above is selected for stocking, and it is required that the height of a plant community is smaller than 30 cm to guarantee that poultry can see poultry houses; the stocking density and the scale of the poultry and distribution positions of the poultry houses are determined according to the use area of the selected grassland and the poultry raising aim, and the distance between the poultry houses are adjusted according to the determined stocking density of the poultry; after young poultry are subjected to heat supplication stopping and then freely raised on the selected grassland by means of the poultry houses, sufficiency drinking water supply is guaranteed in the daytime, and feed is supplemented at night; the poultry houses are moved every 1-2 months according to vegetation conditions and soil conditions of grazing pasture, and accumulated faeces are evenly scattered around the poultry houses; poultry eggs and poultry products are harvested; after the stocking period of the poultry ends, added forage is harvested and/or cattle and sheep are grazed.

The invention discloses a method for treating black and odorous bottom mud by combining in-situ injection of calcium nitrate and ecological restoration, which comprises the following steps: injecting5-10kg of liquid calcium nitrate solution into each square meter by using a shipborne target type dosing device, and ensuring that the depth of the liquid calcium nitrate solution injected into the bottom mud is generally 15-20cm; planting submerged plants and emergent aquatic plants in the bottom mud within 4 weeks after the liquid calcium nitrate is injected; harvesting the submerged plants at the length of 10 cm at the end of spring or summer, cutting off the upper parts of the emergent aquatic plants in winter, and remaining rhizomes. The method can treat the black and odorous riverway quickly and effectively, can improve the black and odorous sediment environment fundamentally, is low in cost, low in energy consumption and small in disturbance to the environment, is beneficial to restoring the ecological landscape of the riverway, and can restore the ecological function of the riverway fundamentally.

The invention relates to a degenerated marsh wetland fish habitat restoration method. The technical problem that an existing marsh wetland becomes degenerated marsh without water or fish, and the ecological function of serving as transit rest land of migrating birds is lowered is solved. Accordingly, a habitat space is suitably restored, and a breeding habitat is suitably restored. For the restored marsh wetland, after a flood recedes, the number of fishes stuck in the marsh wetland is obviously increased compared with that before restoration, the increment of fish weight is 150.1%, and the increment of the number of individuals is 99.4%; a certain number of fish resources can be kept in autumn and spring for the birds to eat, and then the originally lost ecological function of serving asthe transit rest land of the migrating birds in autumn and spring is restored.

The invention discloses a solar plug flow circulation and reoxygenation device and method for a eutrophic water body, belonging to the fields of ecological management and water treatment. The solar plug flow circulation and reoxygenation device comprises a floating body playing a supporting role, a solar power supply device and a storage battery, wherein the floating body comprises three parallel floating plates, i.e., a first floating plate, a second floating plate and a third floating plate, two ends of two parallel rotating shafts are respectively arranged on the first floating plate and the third floating plate, the second floating plate is vertically arranged in the middle of the two parallel rotating shafts, one end of the second floating plate is provided with a DO (Dissolved Oxygen) device, and the solar power supply device and the storage battery are arranged in the middle of the second floating plate. The solar plug flow circulation and reoxygenation device also comprises a solar tracking device, a horizontal plug flow mixing platform, a horizontal plug flow mixing device, a vertical aeration transmission device and a vertical aeration circulating device. According to the invention, horizontal plug flow mixing circulation and vertical aeration circulation are combined, so that the two functions including reoxygenation and plug flow of the water body are unified.

The invention belongs to the technical field of water purifying, and relates to a plant parterre type water purifying device. A plant parterre is built in a water body system, and water is purified through the purifying function of aquatic plants in the plant parterre. The plant parterre is of a tank or a column shape. Inner filler is contained in an inner cavity, seam walls are arranged on the periphery of the cavity, and a steel wire mesh is inserted in the top of the cavity. The water body system is a flowing water system, a floater is arranged on the top face of the water body system, a water body bottom is laid at the bottom of the water body system, a water inlet pipe valve is arranged on one side of the water body system, an inflow water distribution tank is disposed on the inner side of the water inlet pipe valve, the tank-shaped plant parterre is arranged at the corner of the other side of the water body system, and a drainage well is arranged between the tank-shaped plant parterre and the walls of the water body system; an outflow water overflow port is formed in the upper portion of the outer side of the tank-shaped plant parterre, and a drainage pipe or ditch is arranged on the side wall corresponding to the overflow water overflow port. The water purifying device is simple in overall structure, the building process is mature, pollutant purifying efficiency is high, manual operation is not needed, the use cycle is long, effectiveness is good, plants can not spread disorderly, maintenance and management are easy, popularization is facilitated, and the application environment is friendly.

The invention discloses a composite soil passivator and a preparation method thereof. The composite soil passivator comprises the following components in parts by weight: 80-100 parts of water, 2-8 parts of blast furnace slag, 1-4 parts of a microbial agent, 10-20 parts of a biological matrix, 2-5 parts of a nutritional agent, 4-6 parts of sepiolite, 5-15 parts of sodium metasilicate pentahydrate and 4-10 parts of a pH regulator. The passivator prepared by the invention is an organic-inorganic composite soil passivator, can effectively fix heavy metals in soil and prevent the heavy metals from entering plants, can also improve the soil environment and improve the soil fertility, and has an obvious passivation effect.