44results about How to "Accelerate solid-liquid separation" patented technology

The present invention relates to a method of dewatering whole stillage comprising subjecting whole stillage to one or more enzymes capable of degrading a whole stillage component and separating the material obtained in step i) into a solid fraction and a liquid fraction.

The invention discloses a method for iron internal electrolysis treatment of hard-degradation organic wastewater in strengthened by magnetic catalyst and used fillings thereof, relating to the technical field of treatment methods of hard-degradation organic wastewater. The method comprises the following steps: a. preparing powdery copperized magnetic particles; b. introducing wastewater with the pH value being adjusted to 3 to 5 into a magnetic catalyst iron internal electrolysis bath in which mixed fillings of powdery copperized magnetic particles and scrap iron at the weight ratio of 1:6 to10, and completely stirring the fillings by controlling the amount of aeration; and c. fast separating solid from liquid in the treated wastewater with electromagnet. The method has the advantages oflow cost required, stable operating effect and high treating efficiency. Compared with the conventional method for internal electrolysis treatment of hard-degradation organic wastewater, the speed isimproved by 4 to 5 times, and the COD removing ratio in the same condition is increased by 40% to 50%.

Described herein are methods and apparatus for solid-liquid separation with high efficiency, especially in treating spent filter backwash and sedimentation tank sludge produced in the water treatment process. It combines and applies gravity, electromagnetic force, dynamic filtration, and gravity condensation, magnetic and gravitational compression in one integrated device that produces high quality effluent water (less than 10 ppm suspended solid) and highly condensed sludge (less than 94-96% water content).

The invention discloses a polishing waste slag recycling method which comprises the following steps: settling, screening, pressure filtration and utilizing, wherein the screening step comprises the process of sequentially passing the settled slurry through a 6-20-mesh screen, a 40-60-mesh screen and a 110-130-mesh screen. The polishing waste slag recycling facility comprises a polishing wastewater output tube, a flocculant output tube, a settling tank, filter screens, scrapers and a filter press. By using the polishing waste slag recycling method, the flocculant added into the settling tank accelerates the solid-liquid separation of the polishing wastewater; the settled slurry is subjected to layered screening, thereby enhancing the screening efficiency and avoiding the problem of screen blockage caused by the settled slurry; and the settled slurry is recycled for different purposes by different screening ways, thereby implementing the maximum-applicability reutilization on the waste.

The invention discloses a method for preparing a biological flocculant by using biological iron-calcium slag in biological heap leaching. The biological iron-calcium slag produced in the process of low-grade copper ore hydrometallurgical biological heap leaching is used to reduce the iron content in the biological iron-calcium slag. Leaching and concentration include three main steps: (1) Iron-calcium pre-separation: mix biological iron-calcium slag and raffinate in proportion to obtain iron-rich raffinate, and then add limestone for neutralization to obtain biological iron-rich (2) Multi-stage countercurrent leaching: Through two-stage serial leaching tanks, the biological iron-rich slag is circulated and leached in the system; (3) Colloidal destabilization and separation: The mixed solution is destabilized by ultrasonic and high temperature to reduce viscosity, Then press filter to obtain the biological flocculant. The invention has low production cost, and the iron concentration in the leaching solution is greater than 100g / L, and can be used as a biological flocculant, which solves the problem of accumulation of biological iron-calcium slag in enterprises, reduces environmental risks and pressures, and simultaneously creates economic benefits for enterprises.

The invention discloses a solid-liquid separation device which comprises a sedimentation tank. A water incoming pipe is arranged above one side of the sedimentation tank, a water outgoing pipe is arranged below the other side of the sedimentation tank, a blow-off pipe is arranged at the bottom of the sedimentation tank, a solid-liquid separator is arranged below the water incoming pipe, a first water pipe and a second water pipe are arranged at the bottom of the solid-liquid separator oppositely and communicated with the water incoming pipe, and centers of the first water pipe and the second water pipe are not on a same straight line; a separation portion is arranged in the solid-liquid separator, stabilizing portions are arranged above and below the separation portion, a spindle penetrates the stabilizing portions, circumferential rotating direction of the spindle in the stabilizing portions is unlimited, a cant board portion is arranged on the spindle and provided with a triangular board, a whirling portion is arranged below the cant board portion, and the first water pipe, the second water pipe and the whirling portion are arranged in a same plane. The solid-liquid separation device has the advantages of small occupied space, quickness in flocculation and conservation of energy sources.