283 results about "Biosorption" patented technology

This invention provides a method for deeply treating papermaking wastewater. The method comprises: treating wastewater in a biochemical secondary precipitation pool, performing chemical flocculation, precipitating, filtering with composite filtration materials, adsorbing with biological adsorbent or oxidizing with oxidant, storing in a clear water tank, and recycling. The water purifier of chemical flocculation is composed of aluminum salt and/or iron salt, and nonionic, anionic or cationic polyacrylamide. The aluminum salt is one or more of aluminum chloride, aluminum sulfate and potassium aluminum sulfate. The iron salt is one or more of ferrous sulfate, ferric sulfate, poly (ferric sulfate) and ferric chloride. The biological adsorbent is adsorbent containing active sludge. The oxidant is ozone, ClO2 or Cl2. After deeply treated with this method, wastewater can satisfy strict discharge standards.

The invention discloses an ecological fish farming method in a rice field, which comprises the following steps of rice field preparation, rice field transformation, fish farming facility preparation, rice seedling transplantation, biosorption, rice field disinfection, irrigation, fertilization, stocking fish seed selection, stocking fish fry disinfection, stocking and feeding management, wherein annular field fish ditches dug through the rice field transformation are V-shaped ditches arranged on the inner sides of ridges around the rice field; the biosorption utilizes a biosorption agent to adsorb heavy metal in rice field soil and irrigation water; and stocking fish seeds are selected from eight-beard catfishes. The invention further discloses rice produced by rice plants planted in the rice field using the ecological fish farming method. According to the method and the rice, an effective usable area of the rice field is increased significantly; pollution of the heavy metal such as lead and cadmium is reduced; integral benefits of fish farming in the rice field are improved; the ecological rice contains rich protein, more microelements such as iron, magnesium and calcium, and vitamin C, has no chemical pesticide residual, and is green and environment-friendly; and the content of the heavy metal such as lead and cadmium is very low.

The invention discloses an air purifying material of microorganism absorption degradation, a preparation method and applications thereof. The air purifying material of microorganism absorption degradation is obtained by embedding biological grains with 2 to 4mm grain diameter of pseudomonades or acinetobacter which are cultured and acclimatized in a crosswise way in calcium alginate gel. The air purifying material of microorganism absorption degradation can be used in the long time purification of formaldehyde and benzene series pollution in rooms with obvious effect. The product has the advantages of high activity of immobilized cells, good stability, effectively reducing the content of chemical pollution of formaldehyde and benzene series pollution in rooms, being beneficial for realizing the recycling, regenerating and reusing of biocatalysts, and seriously avoiding the pollution to room environment by microorganisms. The raw material has low cost, the preparation process is simple, easy and convenient in operation, and product can be applied in different reactors.

The invention discloses a preparation method of an alga biological adsorbent, belonging to the field of adsorbents. The preparation method comprises the steps of: firstly carrying out physical processing of drying and pulverizing on algae, then carrying out chemical treatment to remove impurities adsorbed to the algae, deactivating the algae under high temperature and strong acid conditions, mixing with modified activated sludge, and carrying out carbonization coating to obtain the biological adsorbent, which can be used for treating heavy metal wastewater, on the surfaces of particles. According to the preparation method, dead algae have more broken cell walls, and more internal functional groups are exposed to be combined with metal ions, so that the effect for treating the heavy metal wastewater is better; the adsorbent can be recycled; in addition, the activated sludge is added, so that the adsorption capacity is increased and the adsorption speed to heavy metals can be increased.

The invention relates to a method for preparing beam biological absorber, which can remove and recycle heave metal ion, wherein it directly uses beam as water processing agent, with low mechanical strength and easy broken, and the adsorption capacity can reach 30mg/g; and the invention comprises: breaking the beam, selecting the ones whose diameter is lower than 5mm; adding alkali liquor at 10-80Deg. C to be pretrated for 0.5-24 hours; the amount of alkali liquor and bema are 2-30ml/g; the density of alkali liquor is 0.01-1M; washing it with water to neutral; adding organic acid solution to be modified; the density of organic acid density is 0.05-1M, at 30-130Deg. C; the amount ratio between organic acid and beam is 2-30ml/g, to be modified for 0.5-12 hours; washing it to neutral and drying at 20-80Deg. C. The inventive absorber can be deabosrbed via diluted acid at 0.02-1M; then regenerated via 0.005-1M diluted acid to be used again. The invention has low cost, while the adsorption capacity can reach 60-200mg/g, without secondary pollution.

The invention discloses a comprehensive treatment and utilization technology of livestock and poultry breeding wastewater. The technology concretely comprises the following steps: solid liquid separation, biological adsorption and condensation, UASB, two-stage A/O, efficient MBR, chemical phosphorus removal and ultraviolet catalytic ozonation. Compared with the prior art, the technology has the following benefits: the technology ensures that treated wastewater can meet the requirements of intensive pig farm pollutant discharge limitation in discharge standard of pollutants for livestock and poultry breeding (GB18596-2001) and water quality standard for farm irrigation) (GB 5084-2005) through the process combination; nutrient substance, such as organic matter, nitrogen and phosphorus, in breeding wastewater is recycled through the effect of biological adsorption and condensation on the basis that the technology reaches a standard, so that composting production is performed, and the problem that resource recovery cannot be performed through the existing single pollution treatment technology is solved; the ozonation efficiency is improved through ultraviolet catalysis, and the problems that the existing ozonation technology cannot be stable and reach a standard and the energy consumption is high are solved; external energy input for the whole technology is greatly reduced throughrecycling of marsh gas for generating power.

The invention provides a composite material with formaldehyde purification function, which is prepared by dissolving 45-73 parts by weight of powder with formaldehyde purification function, and one or both of 0.15-1.2 parts by weight of reinforcing fiber and 15-20 parts by weight of filling material in 20-40 parts of compound solution. The powder with formaldehyde purification function is prepared by mixing 38-55 parts by weight of calcic inorganic base, 6-16 parts by weight of algae and 3-6 parts by weight of modifier; and the compound solution is compounded from 100 parts by weight of clear water, 1.5-2.0 parts by weight of crystal modifier, 0.4-0.5 part by weight of waterproofing agent and 0.4-0.5 part by weight of defoaming agent. The formaldehyde adsorption rate of the composite material is 95%, the formaldehyde purifying effect durability is up to 90%, the methylbenzene adsorption rate is 68.5%, and the methylbenzene purifying effect durability is up to 50.4%. Compared with the chemical process, biosorption process and adsorption process adopted by the traditional formaldehyde purification material, the invention has the advantages of natural and environment-friendly raw materials, obvious purifying effect, wide product derivation performance and low cost.

This invention is referred to a new bacterial strain of Bacillus sp., to be applied in a metal biosorption process, which was deposited in the Agricultural Research Culture Collection (NRRL) International Depositary Authority, 1815 N. University Street, Peoria Ill. 61604, USA, having an accession number NRRL-B-30881. It is described, also, a sporulated and non-sporulated industrial inoculant of said bacterium, a method to produce said inoculant, and a process to remove metals by said bacterium.

The invention relates to a fixed bacteria biosorption of Cd and preparing method thereof, also relates to a biosorption made from a special bacteria processed by chemical agent embedding and preparing method thereof, the bacteria is bacillus cereus, the chemical agent is 2.5% of sodium alginate solution, suiting for processing waste water containing heavy metal Cd, which absorption efficiency of Cd is more than 50%.

The invention discloses a method for removing lead in heavy metal polluted soil by utilizing nanometer zero-valent iron and citric acid for combined elution. The method comprises: adding nanometer zero-valent iron into a citric acid solution to prepare a nanometer zero-valent iron and critic acid composite solution, adding the composite solution into lead polluted soil, performing oscillation, elution and centrifuging at room temperature, then performing membrane filtration and collecting filtrate. The eluent is simple to prepare, strong in operationality and substantial in elution effect, and has the elution rate on lead of 83.08%; the lead content of eluted soil accords with soil environmental quality standards; lead in eluate can be recovered by chemical precipitation, biological adsorption and the like, and the eluate reaches discharging standards and does not cause secondary pollution to environment.

The invention discloses a method for adsorbing lead in wastewater by using a composite magnetic biological adsorbent. The method comprises the following steps of: adding 15-60 g/L of the composite magnetic biological adsorbent by wet weight into lead-contained industrial waste water with a pH value ranging from 2 to 6.5 and a concentration being 10-500 mg/L; oscillating and adsorbing the mixture at a temperature of 30-35 DEG C for more than 8 hours; then separating the adsorbent from the wastewater; and adjusting the wastewater to be neutral to discharge. The composite magnetic biological adsorbent uses white-rot fungus living mycelium as a carrier; the mycelium is wound into a pellet; Fe3O4 nanometer particles and calcium alginate are embedded inside the pellet; and the calcium alginate serving as an immobilization medium is used for tightly connecting the mycelium with the Fe3O4 nanometer particles. The method provided by the invention has the advantages of large adsorption amount, high adsorption efficiency, simpleness and convenience for operation, low cost, high recycle rate, cleanliness, no pollution and the like.

The invention discloses a heavy metal biological absorbent, a preparation method of the absorbent and an application in treating cadmium-containing wastewater. The heavy metal biological absorbent mainly consists of penicillium simplicissimum bacteria powder after being modified by rhamnolipid. The method for preparing the biological absorbent comprises the following main steps: culturing penicillium simplicissimum in a liquid culture medium, then continuously enlarging and culturing the cultured penicillium simplicissimum, adding the rhamnolipid taken as biosurfactants during the process, collecting fungus balls after the culture, cleaning the fungus balls with inorganic salt solution, freezing and drying the fungus balls to the constant weight and grinding the fungus balls into powder to obtain the heavy metal biological absorbent. In the application in treating the cadmium-containing wastewater, the heavy metal biological absorbent is mainly utilized to remove the cadmium in the wastewater, and the method mainly comprises the following steps: adding the heavy metal biological absorbent into the cadmium-containing wastewater, carrying out oscillatory reaction and completely removing after the filtration. The heavy metal biological absorbent has good absorption effect when being used for treating the cadmium-containing wastewater. The method for removing the cadmium contained in the wastewater has the advantages of simple operation conditions, low cost and high efficiency and is easy to implement.

The invention discloses a biological adsorbent capable of removing fluorine and heavy metals in wastewater, a preparation method and an application method. The preparation method of the biological adsorbent takes filamentous fungi as the raw material and comprises the following steps: preparing a liquid culture medium by using crops rich in sugar and starch, culturing at the constant temperature, simultaneously stirring and reacting the liquid culture medium with an aluminum sulfate liquid, filtering, washing and drying to prepare the biological adsorbent. The biological adsorbent is simple in preparation process, low in preparation cost, mild in experiment operating conditions and free of secondary pollution, is environment-friendly, is high in fluorine ion adsorption capacity being 98.2mg/g, and is capable of simultaneously, efficiently and quickly removing fluorine ions and heavy metal ions such as lead, zinc, copper, cadmium and the like in the wastewater.

The invention relates to a preparation method and application of a modified orange peel biological adsorbent. The method comprises the steps that the orange peel waste material is cleaned, dried, ground, screened, and refluxed with epichlorohydrin in absolute ethyl alcohol and NaOH solution, so the epichlorohydrin cross-linking type orange peel is obtained; and the epichlorohydrin cross-linking type orange peel is added with a catalyst and a modifier to be continuously stirred, after the reaction is completed, and the treated orange peel is cleaned and dried, so the cysteine or diethylene triamine modified orange peel biological adsorbent can be obtained. The adsorbent can effectively adsorb the heavy metal ions of Cu<2+>, Pb<2+>, Ni<2+> and Zn<2+> in the wastewater, the treatment cost is low, the efficiency is high, and the treated water body can reach the national wastewater discharge standard, so the purpose of treatment of wastes with another waste is realized. Moreover, the heavy metal ions in the wastewater can also be recovered, and the adsorbent has the characteristics of low cost, reusability, simple preparation method and strong adsorption capability.

The invention relates to a reclaimed water recovery treatment method and a device; the treatment method includes that: a first level biochemical treatment is carried out on waste water, and then precipitation is carried out, then a second level biochemical treatment is carried out and the water is recovered after sterilization; aeration is conducted in the first and the second biochemical treatment processes; the first level biochemical treatment adopts microporous Polymerized cellulose ether filler and the second level biochemical treatment adopts the biosorption method; and the sludge generated in the second level biochemical treatment process is flushed back to the first level biochemical treatment process. The device comprises an electric control system and a waste water treatment unit; the waste water treatment unit comprises a water collecting tank, a first level biochemical tank, a sedimentation tank, a second level biosorption tank and a sterilization tank which are sequentially connected; aeration devices are arranged in the first level biochemical tank and the second biosorption tank; the second level biosorption tank is communicated with the water collecting tank or the first level biochemical tank through a back-flushing pump. The reclaimed water recovery treatment method and the device are widely applicable to various reclaimed water recovery treatments.

The invention relates to laboratory waste water treatment, in particular to a laboratory waste water treatment method and a device. In the method, laboratory waste water is subject to internal electrolysis, micro electrolysis and biosorption in sequence; aeration is carried out along with treatment; sludge produced in waste water treatment is dried, and the drying treatment is characterized in that gas produced in the aeration process is used for drying the sludge. The device comprises an electric control system and a waste water treatment unit, wherein, the waste water treatment unit comprises an inner electrolytic cell, a micro electrolytic cell, a biosorption cell and a desilter which are sequentially connected from front to back; the inner electrolytic cell, the micro electrolytic celland the biosorption cell are all provided with an aeration system; in addition, the device of the invention is also provided with a sludge filtering cell for treating sludge. The method and the device of the invention can be widely applied in treating waste water in various organic chemical engineering laboratories.

The invention discloses a preparation method and application of biosorption material prepared from seaweed plants and chitin amine. The preparation method includes pretreating seaweed plants with the hydrochloric acid solution to eliminte the swelling capacity of alginic acid in the seaweed plants after protonized; and pulverizing the seaweed plants to evenly dispers the seaweed plants in a chitin amine solution to obtain the dispersion. After the dispersion is dropped or extruded into an alkali solution, the chitin amine is precipitated, the seaweed plants dispersed in the solution is coated in the chitin amine, and alginic acid in the seaweed plants is also converted into the water-soluble sodium alginate. The biosorption material is used for treating heavy metal ions-containing waste water with a remarkable effect. The chitin amine can adsorb heavy metal ions by chelation, and sodium alginate in the seaweed plants can combine with heavy metal ions by forming water-insoluble salt. The adsorbed heavy metal ions can be conveniently separated from the waste water.

A biosorption material, a preparation method and purpose thereof. The preparation method is by charring corn straw cores at 200-300 DEG C for 1-3 h. According to the invention, corn straw cores are modified through a physical method to substantially reduce adsorption to water, increase adsorptivity to petroleum; the corn straw cores are controlled to absorb petroleum first and has a fast petroleum adsorption speed. The production method is simple and practical, utilize pollution-free material and has low operation temperature and low energy consumption. The invention fully utilizes a lot of excessive and cheap corn straw to changing waste into valuables. The biological petroleum adsorption material made of corn straw core has small proportion, is convenient for transportation and recovery and floats on water surface without deformation; and absorbed corn straw cores can be used as industrial raw material or substitution energy. The material can realize rapid removal of water surface petroleum pollution and avoid large diffusion and secondary pollution of oil stain, and has important social, economic and ecological significance for marine protection, river ecology and environment.

The present invention relates to the application of the biological adsorption and biological oxidation ability of both conventional wastewater treatment biological selection technology and, if desired, chemically-enhanced wastewater treatment biological selection technology to remove pollutants from precipitation-generated flows collected by a combined sanitary sewer system, a separate sanitary sewer system, and/or a combination of both systems for: (1) the biological adsorption and oxidation of suspended and dissolved pollutants as measured by standard methods tests for carbonaceous biochemical oxygen demand, and/or (2) the biological adsorption of all other dissolved non-conservative and conservative pollutants as measured by all other standard methods tests for such pollutants.

The invention belongs to the field of microorganisms and discloses serratia marcescens and a preparation method and application thereof. A sequence of the serratia marcescens is shown as SEQ IN NO:1 in a sequence table. The preparation method includes: extracting a soil sample from the periphery of a waste battery and heavy metal landfill of a solid waste treatment plant, adding into sterile water, vibrating completely, standing to obtain supernatant, diluting the supernatant into different times, respectively spreading onto a culture medium, adding heavy metal ions to the culture medium to carry out culturing, selecting ingle colonies from the culture medium, inoculating to a slant culture medium to obtain original strains; inoculating the original strains to a liquid culture medium, performing constant-temperature shake culturing, standing overnight to obtain a bacterial liquid, diluting the bacterial liquid, respectively putting in sterilization plates, performing ultraviolet radiation, spreading to a solid culture medium, and performing constant-temperature static culturing and enriched heavy metal analysis to obtain the serratia marcescens. The serratia marcescens has an excellent performance in adsorption of Cr2+, Cd2+ and Pb2+ and is an excellent biosorption material.