45results about How to "No ecological risk" patented technology

The invention discloses a method for breeding non-flying Harmonia axyridis. The method uses gene interference methods to interfere with expressions of vestigial or ultrabithorax, key genes of the wingdevelopment of the Harmonia axyridis, to breed the non-flying Harmonia axyridis. The breeding of the non-flying Harmonia axyridis includes three specific methods: injecting dsRNA, feeding dsRNA/nano-carriers, or soaking the body surface of the Harmonia axyridis in dsRNA/nano-carriers/surface active agents, or spraying or dripping the dsRNA/nano-carriers/surface active agents onto the body surfaceof the Harmonia axyridis. The method breeds the non-flying Harmonia axyridis by three potential gene interference methods, and the three potential gene interference methods are highly-efficient and stable and capable of thoroughly solving a problem of difficult colonization of artificially released natural enemies Harmonia axyridis in the control area, and has important theoretical and practicalsignificance. By applying the feeding method and the body wall penetration method to gene interference, the current situation of time-consuming and labor-consuming traditional methods is completely changed, efficiency and success rates are greatly improved, and costs and operation difficulty are reduced. The method for breeding the non-flying Harmonia axyridis has obvious social and economic benefits and no potential ecological risk.

The invention relates to a nitrogen controlling material prepared based on lake sediment, a preparation method and application thereof. The preparation method includes: collecting lake sediment as the raw material, conducting freeze drying, grinding and sieving, then carrying out high temperature roasting for certain time, and performing cooling so as to obtain the nitrogen controlling material. According to the invention, lake sediment is adopted as the raw material, and is subjected to heat treatment to prepare the nitrogen controlling material. The nitrogen controlling material comes from lake sediment, not only has low price, but also has high safety, has no ecological risk to lake water, also the high temperature roasted sediment has the characteristics of strong ammonia nitrogen adsorption capacity and weak desorption, thus solving the problems of high cost of ammonia nitrogen controlled release materials, poor ecological safety and limited ammonia nitrogen controlled release effect in the prior art.

The invention provides a preparation method of an oxygen-carrying and adsorbing composite functional material and application of the oxygen-carrying and adsorbing composite functional material in water body remediation. The oxygen-carrying and adsorbing composite functional material is used for repairing water body, and at the same time, pollutants such as endogenous nitrogen and phosphorus in thewater body can be efficiently adsorbed, and the problems of water body anaerobism and the like are solved; moreover, the material is low in cost and good in ecological safety, and the preparation method of the oxygen-carrying and adsorbing composite functional material comprises the following steps: (1) firstly carrying out dipping modification on a base material by using a metal cation salt solution, filtering and drying, then carrying out dipping modification by using an alkaline solution in a contact manner, filtering and drying to obtain a modified base material; 2) granulating the modified base material to prepare particles, 3) calcining obtained particles at a high temperature of 600-1000 DEG C to obtain a porous particle material, and 4) dipping the porous particle material in oxygen, carrying out pressure swing adsorption-oxygen carrying treatment, and carrying out oxygen loading in pores or on the structure of the porous particle material.

The invention provides a small ecological corridor for blocking and purifying runoff pollutants in rivers, which is composed of an intercepting and collecting system and a purifying system, wherein the intercepting and collecting system consists of an intercepting and collecting corridor frame (1) and intercepting and collecting filling matrix (2); and the purifying system consists of a purifying matrix (3) and purifying plants (4). The ecological corridor can effectively intercept and purify the runoff pollutants in the rivers, particularly in catchment areas of rural rivers, and besides, the used materials have no any ecological risk; and the small ecological corridor is simple in design, low in cost and low in running and maintaining cost.

The invention relates to a method for removing hydrogen sulfide through steel slag. The method includes that steel slag is dried and crushed and then is filled in a reaction bed, the reaction bed is heated to be at 30-50 DEG C and then is kept at constant temperature; mixed gases are filled from the bottom of the reaction bed at 80-100 SCCM constant speed, tail gases generated after reaction are discharged from the top of the reaction bed and filled into a flue gas analyzer; when the flue gas analyzer detects that the tail gases contain hydrogen sulfide, the tail gases discharged from a gas outlet of the flue gas analyzer are filled into alkaline liquor, and when the flue gas analyzer detects that concentration of hydrogen sulfide reaches 10-20mg/m<3>, filling of mixed gases is stopped. According to the method, waste steel slag serves as treating agents, the two reactants are wide in sources and large in harm, and reactions of the two reactants can remove stink and solve the problem of environment pollution caused by steel slag; the hydrogen sulfide removing efficiency is high, the industrial wastes, namely steel slag, can be recycled, and the bidirectional effect of using waste to treat waste is achieved; the treated steel slag can be used as building materials and ecological risks and secondary pollution are avoided.

The invention discloses a method for controlling an alien plant Ageratum conyzoides. The method comprises the following steps: (1) collecting Hypnum plumaeforme and Tortula muralis; cutting the Hypnum plumaeforme and the Tortula muralis into pieces and mixing to prepare moss particles; (2) collecting the Ageratum conyzoides, Aeschynomene indica and Crotalaria mucronata seedlings; (4) dividing Sedum aizoon; (4) constructing an experiment sample area and a contrast experiment sample area from abandoned lands suitable for the Ageratum conyzoides to grow, and forming planting pits; and (5) filling the moss particles into the planting pits, and interplanting the Ageratum conyzoides with three plants including the Sedum aizoon, the Aeschynomene indica and the Crotalaria mucronata. By the aid of the method disclosed by the invention, the growth of the alien plant Ageratum conyzoides can be effectively controlled and the invasion and dispersion of the alien plant Ageratum conyzoides are stopped and controlled. The plants adopted by the method are locally planted; materials are easy to obtain and are easy to culture and manage; no ecological risks occur and the economic benefits can be obtained.

The invention relates to a method for removing hydrogen sulfide through chromium slag. The method includes that chromium slag is dried and crushed and then is filled in a reaction bed, and chromium slag powder is heated to be at 30-50 DEG C and then is kept at constant temperature; mixed gases are filled from the bottom of the reaction bed at 80-100 SCCM constant speed, tail gases generated after reaction are discharged from the top of the reaction bed and filled into a flue gas analyzer; when the flue gas analyzer detects that the tail gases contain hydrogen sulfide, the tail gases discharged from a gas outlet of the flue gas analyzer are filled into alkaline liquor, and when the flue gas analyzer detects that concentration of hydrogen sulfide reaches 10-20mg/m<3>, filling of mixed gases is stopped. The method solves the problems of chromium slag poison and hydrogen sulfide removing, raw materials are pollution sources, and therefore the effect of using waste to treat waste is achieved. Treated chromium slag can be used as building materials and causes no secondary pollution.

This invention discloses a method for promoting growth of massin in a manganese ore tailings accumulation area. In the method, massin, joint vetch, three-round-leaf crotalaria, selaginella and hypnum plumaeforme are used. The method includes the steps that first, selaginella, hypnum plumaeforme and tender stem leaves of massin are collected, and joint vetch seeds and three-round-leaf crotalaria seeds are collected; second, massin stems and cottage are made and wrapped by the hypnum plumaeforme; third, an experimental sample plot is selected and established in the manganese ore tailings accumulation area and planting pits are built; fourth, the massin stems and the cottage are transplanted in the planting pits and covered with the tender stem leaves of massin and soil, the joint vetch seeds and the three-round-leaf crotalaria seeds are spread and sown on the soil, and the selaginella is transplanted. The technology is adopted for promoting growth of massin in the manganese ore tailings accumulation area, vegetation in which the massin is dominant is reestablished, soil can be improved because massin roots can be used for nitrogen fixation and massin steam leaves can be directly buried in soil for fertilizer, and the developed roots of massin can maintain water and soil and stop and control migration of heavy metal in manganese ore tailings accumulation area. According to the technology, the materials are convenient to obtain, and the technology is simple, easy to implement and free of ecological risk.

The invention discloses a compound bacterial agent for nitrogen reduction, and an application and a preparing method thereof. The bacterial agent comprises three bacterial strains, all of the bacterial strains are gram-positive bacteria, namely bacillus sp. No.A, bacillus sp. No.B, and bacillus sp. No.C bacillus amyloliquefaciens. The invention also provides the application of the compound bacterial agent, wherein the bacterial agent is used for preparing a preparation for reducing inorganic nitrogen value in domestic wastewater. The invention also provides a method for preparing a nitrogen reducing agent with the compound bacterial agent. According to the compound bacterial agent, and the application and the preparation method thereof provided by the invention, the bacterial strain is from a natural environment, and has the advantages of no secondary pollution to the ecological environment, no ecological risk, strong adaptability, fast growth speed, easy cultivation and the like. Thecombination of the compound way obtains better nitrogen reduction effect than a single bacterial agent.

The invention discloses a method for preventing and controlling wax-moth larvas by utilizing symbiotic relationship between black ants and Chinese bees. That is, the living habit that the black ants like preying wax scraps, dead bees, the wax-moth larvas and wax-moth larva eggs is utilized to prevent and control the wax-moth larvas in Chinese bee hives and clean the hives, and meanwhile, strong bee colonies are utilized to protect honeycombs and prevent invasion of the black ants to realize symbiotic mutual benefit of the black ants and the Chinese bees. The method comprises the steps of beehive leaving the ground, bee colony strengthening, ant luring, ant introducing and ant colony vigor control. The method is a pure biological method, does not need any chemical agent, is simple, convenient to manage and free of any ecological risk, can ensure the quality of the honey while effectively preventing and controlling the wax-moth larvas, and is very suitable for the technical requirementsof the current ecological green bee industry development.