310 results about "Biological decontamination" patented technology

The invention discloses an urban sewage treatment system and purification method and belongs to the technical field of sewage treatment. The sewage treatment and purification method comprises the steps of collection, physical precipitation, chemical precipitation, anaerobic biological treatment, anoxic biological treatment, aerobic biological treatment, adsorption, disinfection, ultrafiltration membrane filtration and sludge treatment in sequence. According to the method, a physical precipitation method, a chemical precipitation method and a biological purification method are used comprehensively to perform step-by-step classification treatment on different pollutants, the purification efficiency is high, the effluent quality is good, the nitrogen and phosphorus treatment capacity is higher, operation and maintenance are convenient, management is simple, and popularization and use can be realized.

The present invention relates generally to chemical and biological decontamination solutions and methods of using them. The invention is useful for decontaminating a wide range of compounds and organisms. In particular, the systems, methods, solutions, and formulations of the invention can be used to remove and/or neutralize organophosphates and other toxic chemicals, bacteria, bacterial spores, fungi, molds and viruses.

The invention relates to an aquaculture system, in particular to a high-density litopenaeus vannamei ecological engineered healthy breading system. An ecological engineered litopenaeus vannamei breeding facility system is characterized in that: a plastic-covered tunnel (5) which takes a metal rod as a bracket and is covered by a plastic film is arranged above a breeding pool (7), a biological cleaning pool (1), and a biochemical treating pool (2); the breeding pool (7) is spaced by water guide walls (6) in parallel arrangement to form an S-shaped annular flow channel; an outlet of the annular flow channel is communicated with inlets of the biological cleaning pool (1) and the biochemical treating pool (2); the biological cleaning pool (1) and the biochemical treating pool (2) can be opened at the same time, so that water can flow through the biological cleaning pool (1) and the biochemical treating pool (2); or one of the two is opened, and the water just flows through one of the two, and the flow rate of the two is adjustable; the outlets of the biological cleaning pool (1) and the biochemical treating pool (2) are communicated with an air-floating purifying device (3); and an outlet of the air-floating purifying device (3) is communicated with an inlet of the annular flow channel of the breeding pool (7) through a flow device (4). The system provides a good environment and a good condition for the litopenaeus vannamei, saves water resource and energy resource, and is also environmentally-friendly.

A system for reducing biological organisms in a liquid effluent to non-viable organic molecules that includes: a stunning chamber that applies a voltage potential across biological organisms to break cell membranes and disable the defense mechanisms of vital organisms to ultraviolet radiation; a cavitation chamber to physically destroy any remaining membranes of biologicals in the effluent that may play host to vital organisms or allow such to hide therein, the action of the stunning and cavitation chambers releasing interferons; and a molecularly implanted stimulated emitter (MISE) chamber in which high levels of ultraviolet radiation are applied to virions and spores that remain at frequencies that are readily absorbed and operate to disassociate any viable DNA and RNA strands remaining, to thereby cause "death". Prior to the stunning chamber, preferably the effluent has any large solids therein, settled, floated or filtered out. When potable water is to be produced, heavy metals and other common inorganic contaminants are also removed. The resulting effluent is pulsed through the stunning, cavitation, and MISE chambers to gain maximum effect thereof. Once the DNA and RNA strands have been disassociated in the MISE chamber, the environment of the downstream flow is controlled to prevent reassociation of organic molecules into viable DNA or RNA strands by either diluting the output of the MISE chamber to such an extent that organic molecules are unlikely to recombine, or when drinking water is to be produced, by filtering the organic filtering the organic molecules out for cosmetic purposes.

The invention mainly discloses an urban rainwater purification method and a hydraulic jump type filter used therein. According to the technical scheme of the invention, the urban rainwater purification method comprises the following steps: collecting rainwater, detecting the rainwater, carrying out sedimentation treatment, carrying out pH value treatment, carrying out aeration treatment, carrying out biological purification, carrying out fine filtration, and storing. The used hydraulic pump type filter comprises a first filter cartridge and a second filter cartridge, a detection cavity is arranged at a water outlet, only after water body is detected to be in line with urban water consumption requirements by virtue of a detection head, the water body is conveyed into a water storage tank, otherwise the water body is conveyed into the first filter cartridge and the second filter cartridge to be filtered again. The urban rainwater purification method disclosed by the invention has the advantages that the rainwater is collected and purified, collection, permeation, purification and utilization of the rainwater in an urban range are realized to the utmost extent under the premise of guaranteeing waterlogging prevention and safety of a city, urban waterlogging stress can be effectively alleviated and reduced, purification efficiency is high, water quality of the treated rainwater is effectively improved, utilization of a rainwater resource is promoted, and sponge urban construction requirements are met.

A biological decontamination gel, consisting of a colloidal solution comprising from 5 to 30% by mass, preferably 5 to 25% by mass, still preferably 8 to 20% by mass, based on the mass of the gel, of at least one inorganic viscosifying agent: 0.5 to 10 mol/L of gel, preferably 1 to 10 mol/L of gel, of at least one active biological decontamination agent; 0.05 to 5% by mass, preferably 0.05 to 2% by mass, based on the mass of the gel, of at least one super-absorbent polymer; 0.1 to 2% by mass, based on the mass of the gel, of at least one surfactant; and the remainder of solvent.

A biological decontamination method applying this gel.

The invention discloses rhodococcus ruber FQ-2 and an application thereof in degradation of acetone and other common industrial organic pollutants. The application method comprises the steps: an inorganic salt culture medium containing acetone and other common industrial pollutants is inoculated with the rhodococcus ruber FQ-2, a degradation reaction is carried out under the conditions of the temperature of 30 DEG C and the rotating speed of 160 r/min, and thus the organic pollutants are degraded; the common organic pollutants comprise acetone, n-hexane, carbon disulfide, chlorobenzene, butylacetate, ethyl acetate or alpha-pinene. The rhodococcus ruber FQ-2 is taken from activated sludge of an aeration tank of a pharmaceutical factory in Zhejiang province, has good degradation effect on VOCs organic pollutants, especially acetone, and can completely convert acetone into harmless substances such as CO2, H2O, cell biomass and the like; at the same time, the bacterial strain also can degrade common industrial pollutants such as carbon disulfide and chlorobenzene in different extent, so the bacterial strain has broad application prospects in biological purification of industrial wastegas and wastewater.

An integrated duct system is utilized to admit an antimicrobial vapor into a vehicle to decontaminate the contents and surfaces of the vehicle and subsequently to remove the vapor. The ducts comprise an air conditioning and/or heating duct, a decontamination duct for admitting an antimicrobial vapor, an auxiliary circulation duct for diffusing the vapor throughout the vehicle, and an aeration duct for removing the vapor from the vehicle, as well as a catalytic converter for detoxifying the antimicrobial vapor before removal. The integrated decontamination system is suitable for the chemical or biological decontamination of vehicles, provides enhanced vapor delivery and distribution on a rapid basis and also provides for rapid aeration for removing the antimicrobial vapor.

The invention discloses a method for filtering various water sources into drinking water. In the method, a first-level biological purification water preparation unit is added before the conventional water treatment process according to a water purification principle; pollutants harmful to a human body are removed from water without performing sterilization by using ozone and chlorine; a water purification device manufactured by the method has a simple structure and low water preparation cost and is reliable to operate; and people in vast rural areas and rural towns can drink and use the purified water produced by the device. The method is implemented by the following technical scheme: the public biological purification water preparation unit and the conventional water purification treatment unit are designed and manufactured into standard combined filter element modules; according to the sequence of a water purification treatment process, the combined filter element modules are buckled from top to bottom into a tower-shaped water purification device; according to requirements of different water sources and different clients, the modules of the combined filter elements by different processes are replaced only according to the local water quality condition, so that various water sources are filtered into the driving water.

The invention relates to a method and a device for coupling and biologically purifying VOCs under optical/thermal double-driving catalysis. The method comprises the following steps: introducing VOCs waste gas into a main path system or a by-path system, wherein the main path system is communicated with a low-temperature plasma driving optical/thermal catalysis unit and the by-path system is communicated with a biological filler reactor; and then introducing the VOCs waste gas into a biological purification unit to be mineralized completely. The device comprises a humidity adjusting unit, the optical/thermal double-driving catalysis unit and the biological purification unit, wherein the gas inlet of the humidity adjusting device is communicated with a to-be-purified waste gas source through a pipeline; the gas outlet of the humidity adjusting device is communicated with the gas inlet of a three-way gas reversing valve through a pipeline; a first gas outlet of the three-way gas reversing valve is communicated with the gas inlet of the optical/thermal double-driving catalysis unit through a pipeline; and a second gas outlet of the three-way gas reversing valve and the gas outlet of the optical/thermal double-driving catalysis unit are communicated with the gas inlet of the biological purification unit through pipelines. The method and the device have the beneficial effects of high removal efficiency and good purification effect.

A protective fabric or material includes a base material and at least one inorganic filler selected from the group consisting of a chemical decontamination agent, a biological decontamination agent, an electromagnetic radiation shielding agent, an antimicrobial agent, a self-decontaminating agent, a decontamination catalyst, a carbon dioxide absorbing agent, and a combination thereof.

The invention relates to an energy-saving factorized fully-sealed seawater circulation culture process method and a special device of the process method. Water in a culture pool is subjected to eddy current separation and solid-liquid separation and then enters a buffer regulation pool, the water enters two stages of biological purification pools: the front biological purification pool and the back biological purification pool after air floatation reaction purification, a biological filter pool self maintenance inoculation avoidance is carried out, and backflow water is respectively led out from water outlet ends of the two stages of biological purification pools and enters a circuit system. Rest water flown out from the back stage biological purification pool is subjected to the third-stage biological filtering, is then subjected to disinfection treatment, enters a water quality terminal optimization pool and finally flows to the culture pool to form a fully sealed circulation water culture system. The heat loss is avoided to a great degree through the adopted circulation water culture, so the water change (circulation) quantity can be increased, and the water freshness is improved. Compared with the traditional water flowing culture process, the process method has the advantages that the water and the energy are saved, and the discharge quantity of waste water and waste gas is reduced.

The invention relates to a view tower type device for water aeration and biological purification. The structure of the view tower type device is a tower type structure, and the device comprises a water outlet 1, a spill pit 2 and an outlet channel 5, wherein the water outlet 1 is formed at the center of the spill pit 2, and the outlet channel 5 is communicated with the water outlet 1; a plurality of functional layers are arranged to surround the spill pit 2, each functional layer comprises a biological ball purification region 3 and a landscape aquatic plant region 4, and the landscape aquatic plant region 4 is arranged to surround the biological ball purification region, one end of the spill pit 2 is connected with a water duct 7, and a water pump 6 is mounted at the other end of the water duct 7. The view tower type device has the advantages that the dissolved oxygen concentration in sewage is improved by virtue of free wall fall, and a biological enhanced treatment function is added so that the treatment efficiency of constructed wetlands can be improved obviously and the water quality of the sewage plant effluent can be improved. Compared with existing techniques, the landscape functions of the constructed wetlands are not damaged, and the landscape effect of the constructed wetlands and the sewage plants also are added. In addition, the view tower type device for water aeration and biological purification is simple in structure, low in construction cost and convenient to repair.

A device having dielectric layer with opposite sides and a length. First and second electrodes are each on an opposite side of the dielectric layer and offset along the length of the dielectric layer. A voltage source selectively provides a first voltage on the first electrode and a second voltage on the second electrode such that plasma is generated along the dielectric layer, the plasma providing a decontamination mechanism of adjacent air, and movement of the adjacent air along the dielectric layer.

The invention provides a biological purification carrier for wastewater treatment. A method for preparing the biological purification carrier comprises the following steps: mixing pretreated attapulgite with MBAA in salt water; mixing a biomacromolecule solution with the obtained mixed solution; heating to 40-60 DEG C; adding activated sludge and nanometer iron-manganese composite oxide, wherein the adding amounts of the activated sludge and the iron-manganese composite oxide are respectively 2-5% and 1-3% of the mass of attapulgite; adding carbon nano tube and stirring for 1-3 hours, wherein the adding amount of the carbon nano tube is 2-5% of the mass of attapulgite; adding a cyclodextrin composite solution to the obtained mixed solution, adjusting the temperature to be -5-7 DEG C, keeping the temperature for 40-60 minutes, and stirring slowly for curing crosslinking; wrapping the mixture with gauze, compressing to remove water, and washing the mixture with the 10-20% tannic acid solution; placing the mixture into a drying oven with the temperature of 50-70 DEG C for 8-10 hours. The biological purification carrier can efficiently remove pollutants in wastewater through adsorption, and is high in stability, good in elasticity effect, high in wear resistance, simple in production process, and easy to manufacture and master.

Nanoplatelet forms of metal hydroxide and metal oxide are provided, as well as methods for preparing same. The nanoplatelets are suitable for use as fire retardants and as agents for chemical or biological decontamination.

Nanoplatelet forms of metal hydroxide and metal oxide are provided, as well as methods for preparing same. The nanoplatelets are suitable for use as fire retardants and as agents for chemical or biological decontamination.

The invention discloses an indoor air purifier which comprises a casing with an air inlet and an air outlet, a filtering system with a water accumulation filtering layer, a purifying system with a biological purifying layer and a water system with a water distributor. The biological purifying layer is located below the water accumulation filtering layer, and a water outlet of the water distributor is communicated with the water accumulation filtering layer. An indoor air purifying method is further disclosed. The method includes that air passes through the purifier, dust and VOCs in the air is attached to the water accumulation filtering layer when passing through the water accumulation filtering layer, the water distributor is utilized to deliver water to the water accumulation filtering layer, the dust and the VOCs attached to the water accumulation filtering layer is brought into the biological purifying layer when the water flow passes through the water accumulation filtering layer, the dust is adsorbed in the biological purifying layer, and the VOCs are purified in the biological purifying layer. The purifier is simple and compact in structure, simple in operation in the air purifying process, capable of effectively removing indoor dust and the VOCs, high in air purifying efficiency, environment-friendly and even capable of increasing the indoor air oxygen content.

The invention relates to degrading bacteria capable of efficiently degrading pesticide chlorothalonil, and belongs to the field of biotechnology. A classification name of the degrading bacteria is Enterobacter cloacae B9; and a culture preservation number is CGMCCNo. 5527. Chlorothalonil is an organic chlorine farm-oriented broad spectrum bactericide and is proved to have very strong effects of carcinogenicity, teratogenicity and mutagenicity. Micro-biological degradation gains more and more significance because of rich bacteria resources in the environment without secondary pollution caused by introducing other chemical reagents. Microbe BJQ2 capable of degrading the chlorothalonil can be obtained by directional culture. The Microbe BJQ2 is identified as the Enterobacter cloacae B9 by morphology, physiological and biochemical analysis and 16SrDNA sequence homology alignment. The bacteria are the degrading bacteria by using the chlorothalonil as a sole carbon source. A degrading rate is 79.2% after being cultured for 6 days in an inorganic salt culture liquid; and a degrading rate is 92.3% after being used in a soil for 7 days. The degrading bacteria can be used for degradation of the bactericide chlorothalonil, and biological purification of water bodies, soil or agricultural products which are polluted by the chlorothalonil.

The present invention provides compositions effective in decontaminating either biological pathogens or both chemical and biological pathogens. These compositions are particularly suitable for the decontamination of biological warfare agents or both chemical and biological warfare agents The compositions comprise generally a blend of biocides, and may additionally comprise a protein and an enzyme. Further, the composition is contained in a buffered foam forming material for ease in distribution The compositions are nontoxic, noncorrosive and nonflammable.

The present invention is an apparatus and method for the sanitation of biologically contaminated dry goods using a combined gaseous chemical and thermal treatment. The invention consists of three primary items: (1) an chemical dispenser, (2) a sanitizing chamber, and (3) a method of decontamination employing the previous two items. The dispenser is designed to eliminate the need for direct operator handling of the sanitizing chemicals, while providing for the release of an appropriate volume of chemical into the gas phase for the treatment process at the desired treatment temperature. The treatment chamber provides for containment of the chemical treatment gases at the desired concentration for the duration of the treatment. The method involves the use of a mixture of the chemicals used in combination with the dispenser and chamber. The chemical mixture is selected for chemical stability during storage in the dispenser and efficiency during treatment.

The present invention relates generally to chemical and biological decontamination solutions and methods of using them. The invention is useful for decontaminating and/or disinfecting a wide range of compounds and organisms. In particular, the systems, methods, solutions, and formulations of the invention can be used to remove and/or neutralize organophosphates, mustard agents, and other toxic chemicals, bacteria, bacterial spores, fungi, molds and viruses.