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932results about How to "Improve sustainability" patented technology

Phycomycetes microbial fuel cell and preparation method and application of phycomycetes microbial fuel cell

The invention belongs to the technical field of biological fuel cells, and discloses a phycomycetes microbial fuel cell and a preparation method and application of the phycomycetes microbial fuel cell. The phycomycetes microbial fuel cell comprises an anode chamber, a cathode chamber, a transverse diaphragm, an anode, a cathode and an outer circuit, wherein phycomycetes, a culture solution and a carbon source are respectively installed in the anode chamber and the cathode chamber. In the operation process of the phycomycetes microbial fuel cell, operation is conducted by repeatedly converting the electrodes; in the whole operation process, with the help of synergistic effects of the phycomycetes, the effect that azo dye pollutants are degraded efficiently is achieved; the electrodes are alternately used for degrading the azo dye pollutants, therefore, the physiologically toxic effect on current-producing bacteria by the azo dye pollutants is eliminated, and continuous efficient current generation is realized; the phycomycetes is adopted as a biocatalyst for both the anode and the cathode, no metal catalyst is used for modification, no exogenous artificial mediator is added, aeration is not needed, therefore, the construction and operation cost of the microbial fuel cell is lowered, the sustainability of the microbial fuel cell is enhanced, and industrial amplified production of the microbial fuel cell can be conducted beneficially.
Owner:SOUTH CHINA UNIV OF TECH

Integrated type ecological floating bed and water body ecological system repairing technology thereof

The invention discloses an integrated type ecological floating bed and the water body ecological system repairing technology thereof. A physical space of the integrated type ecological floating bed is formed by constructing a floating bed, a sinking bed, a buoyancy adjusting bottle, a lifting chain and an ecological barricading net, and integrates ecological components such as indigenous emergent aquatic plants, submerged plants, attached aquatic plants, fishes, snails and biochemical zeolite. The ecological behaviors of the ecological components are in linear cause and effect relation. The ecological components and organisms in the physical space form a semi-enclosed ecological subsystem with integral completeness. The upper line and the water body ecological system to be repaired are strong in coupling capability, and ecological factors in the lower line can exist stably. The damaged water body ecological system sufferring from one or a plurality of types of pollutions including water body eutrophication, heavy metal pollution, organic pollution and the like can be repaired by building pioneer communities and utilizing self-cleaning capability of the ecological system, pollution is removed, integral restoration or rebuilding of the damaged water body ecological system is promoted, simultaneously environment is beautified, and ecological deterioration of a healthy water body can be prevented.
Owner:HUNAN UNIV

Multi-master asynchronous duplex differential bus and communication method

The invention discloses a multi-master asynchronous duplex differential bus and a communication method. Master nodes (namely master processing modules) acquire a control authority to the bus in turn and scan slave nodes (namely input/output (IO) modules), so that each master node has a chance for transmitting data to be transmitted to the corresponding slave node within determined time; each slave node can send the data to be transmitted to the bus within a determined time period, so that all the master nodes can acquire the data; the bus rate is up to 10 Mbps or even higher; the problem of contradiction between the application cost and the communication efficiency of the conventional relevant bus is solved; the multi-master asynchronous duplex differential bus can be applied to a serial backboard bus protocol of industrial control equipment, a distributed control system and a power system relaying protection and automation device, and real-time data exchange between a plurality of master nodes and a plurality of slave nodes as well as between the master nodes in a device can be realized; and the multi-master asynchronous duplex differential bus has the characteristics of multi-master communication, high speed, low cost, high reliability, high duration and good application prospect.
Owner:NANJING GUODIAN NANZI POWER GRID AUTOMATION CO LTD

Polymeric porous hollow fiber membrane

Purpose: To provide a polymeric porous hollow fiber membrane which exhibits excellent fractionation performance and excellent permeability in treatment of a variety of aqueous fluids and also shows sufficient strength when incorporated into a module or used to treat a fluid, and which is excellent in aging stability in these performances and characteristics and is also excellent in membrane performance recoverability by washing, and which is especially suitable for treatment of a polyphenol-containing beverage and is expected to effectively harmonize the flavor of such a beverage.Solution: A polymeric porous hollow fiber membrane of the present invention is characterized in that(a) the hollow fiber membrane has skin layers on its inner and outer surfaces;(b) the diameters of the pores in the inner surface are smaller than the diameters of the pores in the outer surface;(c) the porosity tends to increase from the inner surface toward the outer surface, and then tends to decrease from at least one portion having a maximum porosity, of the wall section of the membrane, toward the outer surface; and(d) the hollow fiber membrane satisfies a relationship of 2 [%]≦DR≦20 [%], wherein the critical diameter of a fine particle to be removed, found by a fine particle-passing test, is φmax [μm]; the diameter of the pores in the inner surface is dIS [μm]; and the proportion of the pores with dIS exceeding φmax is DR [%]This polymeric porous hollow fiber membrane is also characterized in that the adsorption of polyphenol per a surface area of 1 m2 defined by the inner and outer surfaces of the membrane is from 50 to 500 mg.
Owner:TOYOBO CO LTD

A clean and efficient production process for preparing xylose and l-arabinose

ActiveCN102286571AAddressing the effects of crystallizationHigh yieldSugar derivativesSugar derivatives preparationChromatographic separationYeast
The invention relates to a clean and high-efficiency production process for preparing xylose and L-arabinose and belongs to the field of application of wastes of agriculture and forestry. The production process comprises the following steps of: performing pretreatment on raw materials; hydrolyzing the raw materials in a high-temperature cooking mode; performing neutralizing treatment and performing centrifugal separation on solid slag to obtain xylose or xylooligosaccharide hydrolyzate; adding coarse enzyme solution into xylooligosaccharide solution to hydrolyze to obtain xylose solution; treating the hydrolyzate by Angle yeast; purifying by using active carbon and resin; performing recompression and concentration treatment on the purified hydrolyzate by using a mechanical vapor recompression (MVR) machine; crystallizing the concentrated solution in a gradient program cooling mode to obtain xylose products and xylose mother solution; separating the xylose mother solution by a simulated moving bed or a chromatographic separation technology to obtain a xylose phase and an L-arabinose phase; returning the xylose phase to the xylose solution to concentrate and recrystallize; reusing the xylose mother solution; performing MOVR concentration treatment on the L-arabinose phase and crystallizing in a gradient program cooling mode to obtain L-arabinose products; and reusing the L-arabinose mother solution.
Owner:BEIJING UNIV OF CHEM TECH
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