233 results about "Microbial decontamination" patented technology

PCT No. PCT/GB98/02840 Sec. 371 Date Jul. 14, 1999 Sec. 102(e) Date Jul. 14, 1999 PCT Filed Sep. 18, 1998 PCT Pub. No. WO99/13741 PCT Pub. Date Mar. 25, 1999Food is rendered sterile by UV irradiation, preferably with UV at 265+/-15 nm. A sterilization unit may include UV sources (90, 100, 110, 120) and a heat source, which may be a broad band UV source, a source of IR or microwave radiation. A combined microwave/UV unit can be used to defrost frozen food and simultaneously sterilize it or maintain sterility. Heating prior to UV irradiation can enhance the sterilization, as can rapid cooling after irradiation. Irradiation can also be enhanced by displacing the food during irradiation e.g. by supporting it on a rotatable support (135) and/or by displacing it relative to the support surface.

Food products, such as precooked meats, sausages, and the like are microbially decontaminated in their cooking packages to remove surface microorganism contamination from the packages. The cooking packages are removed and the food products optionally subjected to further processing, such as slicing, and then packaged in aseptic packaging. The microbial decontamination step, further processing and packaging are carried out in a clean room which is maintained to a high level of sterilization or disinfection to minimize or eliminate contamination of the food products with pathogenic microorganisms such as Listeria Monocytogenes. The food products thus leave the packaging plant with a much higher assurance of food safety than is found in a conventional packaging plant.

A river course ecological treatment system essentially comprises a plurality of ecological biological water purification systems and a plurality of plastic retaining dams disposed along a river course, and at least one damp land ecological water purification system disposed beside the river course. The plastic retaining dams separate the river course into several retaining regions. The ecological biological water purification systems purify the water in the retaining regions by microorganism purification. Afterward, the water purified by the ecological biological water purification systems is introduced into rainwater channels of the at least one damp land ecological water purification system. After being purified by aquatic plants in the at least one damp land ecological water purification system, the water returns to the retaining regions the downstream portion of the river course. Therefore, a river improvement system capable of performing both step-by-step treatment and joint treatment is effectuated.

The invention provides a method for treating organic waste gas by combining photocatalysis and microorganisms. Simultaneously, the invention also discloses a device of the method for treating the organic waste gas by combining the photocatalysis and the microorganisms and application thereof. The method for treating the organic waste gas by combining the photocatalysis and the microorganisms comprises the steps of physical dust removal, photocatalyst catalytic oxidation, microorganism purification, and the like, and can effectively eliminate total suspended particulate matters in the organic waste gas and volatile organic compounds in waste gas. The device of the method for treating the organic waste gas by combining the photocatalysis and the microorganisms is applied to treating industrial organic waste gas, and is particularly applicable to treating the organic waste gas in various industrial organic waste gas emission workshops.

The invention discloses a method for the treatment of waste emulsion, more particularly a method for the treatment of waste emulsion generated in the machining processes such as cutting, grinding and the like. The method comprises the following steps: separation of stored emulsion breakers, mechanical air flotation, ion-carbon electrolysis, coagulating sedimentation, oil separation with inclined plate, microorganism purification, sedimentation, sand filtering, etc.; the method has the advantages of simple technology and standard-reaching wastewater, and devices for the implementation of the method have small floor area, little investment, low running cost, low energy consumption, maximal recycling of waste oil resource and prominent operability and is widely suitable for machining and the treatment of waste emulsion in other industries. The waste oil recycled according to the method is completely capable of being used for the production of patented product, the protective grease, thus idealized application of resources is achieved.

The invention discloses a seawater recirculating aquaculture system which comprises a fish pond, an oxygen dissolving tank, an aeration aerator, a first microorganism purifying pond, a second microorganism purifying pond, a rapid filter, a full automatic microstrainer, a protein separator, a temperature adjusting pond, an ultraviolet sterilizer, a water quality monitoring system and a circulation pump. The water quality monitoring system comprises a single chip microcomputer and a sensor. The factory-like seawater fish aquaculture system can greatly reduce investment cost of seawater factory-like recirculating aquaculture and energy consumption in the aquaculture process, improves seawater resource utilization rate, saves energy, protects environment, recycles aquaculture waste and has the advantages of being simple in process and fewer in required water treatment devices and the like.

The invention relates to a process for purifying culturing water mass by utilizing microorganism, wherein microbiological functional bacteria of four various physiological categories, including nitrifying bacteria and nitrosation bacteria, denitrogenation sulfur bacillus in denitrifying bacteria, sulfur bacteria, and photosynthetic bacteria are thrown into the culturing water mass, the throwing amount is 0.05-0.20% of the culturing water mass, while the ratio by volume of various bacteria thrown is, nitrifying bacteria and nitrosation bacteria : denitrogenation sulfur bacillus in denitrifying bacteria : sulfur bacteria : photosynthetic bacteria = (1-4) : (1.6í½3) : (2í½3.6) : (1í½4). The invention can substantially reduce the contaminant in the culturing water mass. íí

The invention discloses a process for treating landscape water eutrophication, which sequentially comprises the following steps of: 1) firstly, uniformly adding a composite microbial agent into landscape water; 2) secondly, after 10 days, uniformly adding a chemical dephosphorization medicament into the landscape water; and 3) finally, in the next day, placing an artificial floating island in the middle of the water, and planting aquatic plants on the artificial floating island to absorb nitrogen and phosphorus in the water by using the root systems of the aquatic plants. The process has the advantages that: a chemical method and a biological method are comprehensively utilized to remove pollutants from the water, namely a microbiological purification method, a chemical dephosphorization method and an aquatic plant repairing method are integrated, so that organic matters and ammonia nitrogen are removed from the water, the phosphate release of mud at the bottom is controlled, and the total nitrogen removing effect is good. Bad V class water is finally purified to meet the standard of V class water by the process according to the spatial and time effects of three kinds of complementary technology.

The invention relates to a method for preparing selective microbial packing. A plant organic fiber or a mixture of the plant organic fiber and activated carbon is used as basic packing, and the method comprises the following steps of: screening, separating and purifying activated sludge to obtain specific desulfurization bacteria; massively propagating and culturing the bacteria in nutrient solution to prepare desulfurization bacterium mother solution; and performing nutrient solution soaking, spraying and mother solution biofilm formation on the basic packing to prepare the selective microbial packing. The biological packing is used for microbial purification in waste gas treatment, and is particularly used for removing stinky pollutants produced in petrochemical plants, sewage treatment plants, urban sewage treatment plants, animal husbandry farms and the like. By the method, class I pollutants in exhaust gases of a refinery are treated specially, the treatment load and efficiency of the pollutants are improved, and impact resistance during change of working conditions is improved.

Fixed microbial filler and its production are disclosed. The process is carried out by taking animals, plant, carbon, textile and particle or fiber of engineering plastic as skeleton of filler, immersing bacterial liquid from cultured active sludge, washing, curing, sizing and obtaining fixed microbial filler with purified microbial membrane. The filler is particle or fibrous mixture and consists of peat, active carbon, mixture of various plants stems or leaves, hollow plastics and mixture of above various substances.

The invention discloses a VOCs treatment method and device. The device comprises a micro-nano bubble purifying tower (1), a microorganism purifying tower (8), an induced draft fan (15), a chimney (16) and a circulating fluid purifying and recycling device (17), wherein a gas outlet of the micro-nano bubble purifying tower (1) is connected with a gas inlet of the microorganism purifying tower (8) through an air duct; a gas outlet of the microorganism purifying tower (8), the induced draft fan (15) and the chimney (16) are connected through an air duct in sequence. According to the device, the circulating fluid purifying and recycling device is used for treating and purifying circulating fluid containing more VOCs generated by the micro-nano bubble purifying tower and the microorganism purifying tower, the circulating fluid is self supplied and can be repeatedly utilized, and the limit condition that the monomer micro-nano bubble purifying tower and the microorganism purifying tower are used for processing secondary pollution of liquid waste generated by the system can be greatly purified, so that the mode that the micro-nano bubble purifying tower and the microorganism are combined for processing VOCs can be widely used.

The invention relates to a microbial purification facility and a method for the water quality of an intensive culture system of a pond. The facility comprises an aeration filter tank, a non-aeration filter tank, a water quantity regulating valve and all connecting water pipes. Corallite, filtering cotton and bamboo joints are filled in the aeration filter tank, and the bottom in the tank is provided with radial water outlet pipes; and the non-aeration biological filter tank is an earth ditch the surface of which is covered with a plastic membrane, and a filtering material is filtering cotton which is hung transversely. In the invention, the quantity of water entering the aeration filter tank is regulated according to the mature condition of a biomembrane of the aeration filter tank and the pollution degree of the wastewater of a culture pond; nutritive salt concentrate is added into a filling opening of nutritive salt, and the optimal proportion of C:N:P of influent water is kept; beneficial bacteria attached to the filtering material of the aeration filter tank can decompose and transform injurants generated in the culture process; and then, EM bacteria and native bacteria lost in the aeration filter tank are fully utilized by the non-aeration filter tank, and the injurants are continuously decomposed and transformed. The invention has high purification efficiency, low cost and convenient material taking and processing and can be widely applied to the purification of the water quality of the intensive culture of ponds for briny and fresh water fishes, shrimps and crabs.

The invention relates to a river treatment system based on micro-nano oxygenation-aeration and biological purification effect. The river treatment system comprises a preliminary filtering device, a water storage tank, a host of a rapid micro-nano bubble generating device, an oxygenation device, a micro-nano bubble aerator and a solid-state microbial carrier, wherein the preliminary filtering device, the water storage tank, the host of the rapid micro-nano bubble generating device and the micro-nano bubble aerator are successively communicated with each other via pipelines; the oxygenation device is communicated with the host of the rapid micro-nano bubble generating device; and the solid-state microbial carrier is fixedly connected with an aeration pipeline of the micro-nano bubble aerator. The river treatment system provided by the invention cooperatively uses the rapid micro-nano bubble generating device and the oxygenation device for oxygenation of a river; and microbial purification in the aeration pipeline is cooperatively carried out so as to reduce the biochemical oxygen demand (BOD) and the contents of total nitrogen (TN) and total phosphorus (TP) and to allow ecological equilibrium of the river to be recovered.

A waste water treatment apparatus includes a physical filter unit. The physical filter unit includes a filter screen layer therein to filter impurities which are large particles and a distal end connected with a changeable fluid dirt activation unit to discharge the bubbles and particles of the waste water. A side wall of the storage cylinder is provided with a storage pipe to communicate with the top of at least one microorganism filter unit. The microorganism filter unit includes a microorganism filter cylinder to purify the waste water through microorganisms. The waste water treatment apparatus further includes a water storage unit. The water storage unit includes a water storage cylinder to collect the treated water for use.

A process and apparatus is provided for generating chlorine dioxide gas for the fumigation of enclosed spaces that includes adding reactants for generation of chlorine dioxide by dropwise addition to an aqueous reaction medium in a sealed reaction chamber while bubbling a motive gas through the aqueous reaction medium, whereby the motive gas releases the generated chlorine dioxide gas from the aqueous reaction medium and drives the release of chlorine dioxide gas from reaction chamber.

The invention discloses a device for purifying flue gas by utilizing microalgae source photosynthetic microorganisms and a method thereof, which relate to environmental biological resource engineering. An LED microalgae source photosynthetic microorganism friendly illuminant of the system conducts light wave produced by an LED to the surfaces of the microalgae source photosynthetic microorganisms through light propagation media-optical fiber, and the microalgae source photosynthetic microorganisms utilize the photosynthesis to purify pollution gas such as CO2 in the flue gas dispersed in a microalgae source photosynthetic microorganism culture fluid containing growth factors so as to produce a large quantity of the microalgae source photosynthetic microorganisms as well as purify atmospheric pollutants simultaneously, wherein the microorganisms contains chlorophyll, protein and other useful organic substances. The device and the method recycle the pollutants, namely improve the efficiency of energy utilization, also eliminate the pollution, and have a green process with stronger practicability. The method has the advantages of less equipment investment, easy operation and high culture density of the microalgae source photosynthetic microorganisms in a reactor, and performs the resource utilization on the pollutants as well as purifies the pollutants simultaneously.

A processor for decontaminating devices is comprised of a chamber for holding devices and a circulation system to circulate a microbial decontamination fluid through the chamber. A water filtration system filters water used in the processor. The water filtration system has a water line connectable to a source of pressurized water. A water decontamination system fluidly communicates with the source of water and the processor. The water decontamination system has a water circulation path and a tank located within the water circulation path. Means are provided to circulate water along the water circulation path through the tank. A gas circulation path fluidly communicates with the tank. Conveying means is provided to convey gas along the gas circulation path through the tank. An ozone producing device is located along the gas circulation path to introduce ozone into gas flowing along the gas circulation path and through the tank.

The invention discloses a comprehensive treatment method of landscape water eutrophication and algae overgrowth. The comprehensive treatment method includes: 1) chemical dephosphorization, namely dephosphorization medicament is added into landscape water body; 2) microorganism purification, namely complex microorganism fungicide composed of primary degradation bacteria and auxiliary degradation bacteria is added into the landscape water body; and 3) aquatic plant auxiliary purification, namely aquatic plants are planted in the landscape water body. The invention has the beneficial effects that three methods of chemical dephosphorization, microorganism purification and aquatic plant restoration are organically integrated, the combination mode of the three methods is adjusted according to the characteristics of high contents of organic matters, nitrogen and phosphorus in eutrophication water body, so as to develop strong points and avoid weakness, and finally poor V type water body is purified to the standard of V type water body; and the landscape water body is effectively purified, and algae growth is controlled, thus solving the problem of water body eutrophication.

The invention relates to a treatment method of ecological breeding circulating water for turtles, and belongs to the technical field of aquaculture water treatment technology. The method comprises the following steps: (1) building a 'fish and vegetable' purifying pond; (2) building an biological filter tank; (3) building a purified water impounding reservoir; (4) recycling. According to the method, the aquaculture waste water is drained to the 'fish and vegetable' purifying pond to carry out primary purification through absorption and degradation of plants, and then is drained to the biological filter tank for the secondary purification through the clean-up effect of microbes. The water treated is promoted to a reservoir for recycling, so as to realize 'zero' drainage of the aquaculture water.

The invention discloses a method for purifying an eutrophic water body by using aquatic animals, plants and microorganisms; aquatic plankton is cultivated beforehand, and the following steps are carried out: a predetermined number of the cultivated aquatic plankton is put in a target water domain; the water body is kept in a transparent state as the aquatic plankton eat blue-green algae in the target water domain and restrain the regrowth of the blue-green algae; submerged plants in the target water domain are recovered to keep the water body in a stable clear state; engonus aquatic animals are poured in the target water domain to reinforce the water body biology diversity; and the ecologic stability of the water body at present is maintained. In the method for purifying the eutrophic water body by using the aquatic animals, plants and microorganisms, the ecologic method is used for forming an excellent water ecosystem to recover the service functions of the original ecosystem.

The invention belongs to the technical field of river treatment, and particularly related to a river sediment ecological treatment method. After solid waste deposited in a river is fished, an intercepting net is arranged at the downstream of the river, citric acid solution serving as an activator and adsorption balls are added into the river, the adsorption balls are filled with adsorbents, sediment and river water are mixed and sufficiently adsorbed, microbial agents are added, a river bottom is subjected to aeration treatment and water disinfection, and submerged plants are cultivated in a tiled manner. By combining various modes of solid waste fishing purification, adsorption of organic pollutants by the adsorption balls, microbial water purification, river bottom ecological plant system building and the like, the river sediment is progressively and omnidirectionally purified and repaired to restore ecological balance, and the river sediment ecological treatment method is low in cost, remarkable and lasting in treatment effect and suitable for popularization and use.

The invention discloses a multi-stage ecological water tank and ecological pond combined system. The system comprises a ladder-type ecological water tank and an ecological pond, wherein the ecological pond is arranged in a river channel and comprises an enclosure which separates out an enclosure region from the river channel, a plurality of bionic aquatic plants are arranged in the enclosure region, and aeration holes corresponding to the bionic aquatic plants are formed in the lower parts of the bionic aquatic plants and are communicated with aeration devices; a water intake is formed in the ecological pond; the ladder-type ecological water tank comprises a first ecological water tank to an Nth ecological water tank which are sequentially arrayed from outside to inside and from high to low; the first ecological water tank is communicated with the water intake through a water intake pipeline; adsorbing fillers are arranged in the first ecological water tank, and filler-water plant-microorganism purification systems are arranged in a second ecological water tank to the Nth ecological water tank; a water outlet is formed in the bottommost ecological water tank in the ladder-type ecological water tank and is communicated with the ecological pond. By combining in situ regulation with abnormal-site regulation of the river channel, the black and odorous water quality is efficiently purified.