Abstract:
A method for treating the waste liquor resulted from ethanol production through cassava fermentation is provided The method comprises the steps of (1) introducing water-soluble ester of alginic acid and/or water-soluble salt of alginic acid into the waste liquor, and subjecting the waste liquor to solid-liquid separation to obtain solid production and liquid production, and (2) subjecting the liquid production obtained in step (1) to the waste water treatment The method can significantly reduce the time for solid-liquid separation, and enormously increase the treatment capacity of waste liquor in unit time without adding extra equipments, thereby, the method resolves the technical difficulty resulting in low load of the equipments used in producing ethanol through cassava fermentation, and enormously increase the production capacity of the equipments for producing ethanol.
Abstract:
A sand sedimentation tank (10) is provided, the tank (10) comprises a tank body (11), an inlet (12) and an outlet (13), wherein the tank body (11) comprises side walls (14) and a bottom (15), the outlet is arranged in a side wall (11), and the bottom (15) has at least one raised part (16) and/or at least one recessed part (17). A sand separator is further provided, the separator comprises a grading unit (30), a particle collector unit (40), and the sand sedimentation tank (10) connected in series. A method for separating mixture of solid particles is further provided. The solid particles comprise first solid particles and second solid particles, wherein, the density of the first solid particles is lower than the density of the second solid particles; the method comprises: forcing the mixture of solid particles to flow with a solvent, making the second solid particles deposit in the flow process to form a layer (22) of the second solid particles, and forcing the first solid particles to continue flowing with the solvent, wherein, the density of the second solid particles is higher than the density of the solvent.
Abstract:
The present invention provides a method for preparing ethanol from root and tuber crops, including the steps of mixing the pulverized crops with enzyme and performing enzymolysis in an enzymolysis device. The enzymolysis device comprises: a flash column; a heat source communicated with the flash column via the third interface; an enzymolysis tank communicated with the flash column via the outlet; a material source communicated with the flash column via the first interface; a vacuum pump communicated with the flash column via the second interface. Before, during or after delivering the pulverized crops into the flash column from the material source, negative pressure in the flash column is established by the vacuum pump to suck the heat medium in the heat source into the flash column to raise the temperature, and then the heated product is delivered to the enzymolysis tank to perform enzymolysis.
Abstract:
A method for producing ethanol from raw material containing cassava residues comprises the steps of: mixing raw material containing cassava residues with enzyme, and enzymolyzing the cellulose in the raw material to obtain enzymolysis product, wherein the mixing of the enzyme and the raw material comprises mixing a first batch of the raw material with the enzyme to obtain a mixture, and then continuously adding the remaining raw material to the mixture at such a speed that the content of the raw material containing cassava residues in the reaction system is 150 g/L or less, and wherein the first batch of the raw material is 10 to 30wt% of the total raw material; and fermenting the enzymolysis product. The inventive method can increase utilization rate of the raw material containing cassava residues, and has high ethanol yield.
Abstract:
A skin-removing device for root and tuber crops comprises a pedestal (1); a rotary drum (2) rotatably fitted on the pedestal and having an inlet (4) and an outlet (5), a helical screw feeder (3) provided in the rotary drum and fixedly connected with the inner wall of the rotary drum; and a driving unit for driving the rotary drum and the helical screw feeder to rotate together. During the use of the device, raw material of root and tuber crops is fed into the rotary drum via the inlet, and the driving unit drives the rotary drum and the helical screw feeder to rotate together. Under push action of the helical screw feeder, the raw material is continuously moved forward, and at the same time the raw material rotates along with the rotary drum and the helical screw feeder. During rotation, friction is generated not only among the raw material, but also between the raw material and the rotary drum wall and the helical screw feeder, so as to remove the skin of the raw material without damaging the flesh of root and tuber crops, such that the loss of raw material is low.
Abstract:
The present invention provides an enzymolysis device, comprising: a flash column (1) comprising a first interface (5), a second interface (6), a third interface (7) and an outlet (11); a heat source (2) communicated with the third interface (7) of the flash 5 column (1) via a communicating vessel (8), the top of the communicating vessel (8) being higher than the liquid level of the material to be enzyme-digested in the flash column (1); an enzymolysis tank (3) communicated with the outlet of the flash column (1); a material source (10) communicated with the flash column (1) via the first interface (5); and a vacuum pump (4) communicated with the second interface (6) 10 of the flash column (1).
Abstract:
A method for recovering solid residue from waste liquor resulted from ethanol production through cassava fermentation is provided The method comprises the steps of introducing water-soluble ester of alginic acid and/or water-soluble salt of alginic acid into the waste liquor, and then subjecting the waste liquor to solid-liquid separation The method can significantly reduce the time for solid-liquid separation, and enormously increase the treatment capacity of waste liquor in unit time without adding extra equipments, thereby, the method resolves the technical difficulty resulting in low load of the equipments used in producing ethanol through cassava fermentation, and enormously increase the production capacity of the equipments for producing ethanol.
Abstract:
Provided is a method for preparing citric acid comprising the following steps: (1) contacting and reacting the fermentation liquid of citric acid with calcium carbonate and/or calcium hydroxide under the condition that the citric acid in the fermentation liquid can be converted into calcium hydrogen citrate, and subjecting the obtained slurry to a solid-liquid separation to obtain solid calcium hydrogen citrate and a first liquid phase; (2) subjecting the solid calcium hydrogen citrate obtained in step (1) to acidolysis to obtain citric acid; (3) contacting and reacting the first liquid phase obtained in step (1) with calcium carbonate and/or calcium hydroxide under the condition that the calcium hydrogen citrate dissolved in the first liquid phase can be converted into calcium citrate, subjecting the obtained slurry to a solid-liquid separation to obtain solid calcium citrate, and recycling the solid calcium citrate to step (1).
Abstract:
Disclosed herein is a skin-removing method for root and tuber crops by using a skin-removing device which comprises a pedestal; a rotary drum rotatably fitted on the pedestal and having an inlet and a outlet; a helical screw feeder provided in the rotary drum and fixedly connected with the inner wall of the rotary drum; and a driving unit for driving the rotary drum and the helical screw feeder to rotate together, wherein the method includes feeding raw material of root and tuber crops into the rotary drum via the inlet, allowing the driving unit to drive the rotary drum and the helical screw feeder to rotate together. In the method according to the present invention, raw material of root and tuber crops is fed into the rotary drum via the inlet, and the driving unit drives the rotary drum and the helical screw feeder to rotate together. Under push action of the helical screw feeder, the raw material is continuously moved forward, and at the same time the raw material rotates along with the rotary drum and the helical screw feeder. During rotation, friction is generated not only among the raw material, but also between the raw material and the rotary drum wall and the helical screw feeder, so as to remove the skin of the raw material without damaging the flesh of root and tuber crops, such that the loss of raw material is low.