Method for preparing phosphorus-containing wastewater adsorbent from aluminum-containing waste residues in non-roasting manner and applications

Abstract

The invention belongs to the field of development of environmental functional materials and new water treatment technologies, and particularly relates to a method for preparing a phosphorus-containing wastewater adsorbent from aluminum-containing waste residues in a non-roasting manner and applications. According to the method, water supply plant aluminum sludge and aluminum plant waste residues are adopted as preparation raw materials, and the phosphorus-containing wastewater adsorbent is prepared through the three steps of aluminum-containing water preparation, granulation and maintenance. The method is simple in process, land occupation and environmental pollution generated in the sludge stacking and landfilling process are avoided, meanwhile, waste recycling is achieved, and aluminum slag reduction is achieved. The auxiliary material cement-based grouting material required to be added in the granulation process is low in cost, the strength of the adsorbent can be improved, roasting is not required, and therefore high-energy loss in the roasting process or chemical reaction in the prior art is avoided. The adsorbent prepared by the invention is suitable for treating wastewater with different concentrations of phosphorus, and can be reused while the phosphorus concentration is efficiently reduced.

Description

technical field [0001] The invention belongs to the technical field of environmental functional materials and water treatment new technology development, and in particular relates to a method and application for producing phosphorus-containing wastewater adsorbent without roasting aluminum-containing waste slag. Background technique [0002] The production of phosphate fertilizer, livestock breeding, phosphate rock mining and sludge dehydration in sewage treatment plants will produce a large amount of phosphorus-containing wastewater, of which the phosphate concentration of phosphorus-containing wastewater produced by sludge dehydration is as high as 53mg / L. Exceeding the standard of phosphorus in water will lead to eutrophication of the water body, resulting in a large number of algae in the water, a decrease in dissolved oxygen, the inability of aquatic organisms to survive, and serious consequences such as deterioration of water quality. [0003] At present, the commonly ...

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Problems solved by technology

[0007] Chinese patent application (notification number: CN102815778A), patent name: a preparation method of an environmentally friendly dephosphorization agent, the method is to acid-dissolve the aluminum slag after the wastewater treatment of the aluminum foil factory, add iron salt additives and calcium aluminate powder to polymerize reaction, and finally a liquid dephosphorization agent is obtained, which has good phosphorus removal effect and less dosage, but its preparation process requires polymerization reaction to maintain the system temperature, and the process is complicated and cannot be reused.

[0008] Chinese patent application (notification number: CN104587960A), patent name: a method for manufacturing high-temperature modified aluminum sludge for phosphorus removal, the method grinds, granulates and bakes aluminum sludge, and increases the internal pore size of the filler by adding starch , enhanced the phosphorus removal effect of aluminum sludge, and the aluminum sludge modified by high temperature has obvious effect on the removal of phosphate, but there are disadvantages such as complex process, energy consumption and the obtained filler can not be reused.

[0009] Chinese patent application (notification number: CN101070202A), patent title: a kind of method of utilizing aluminum hydroxide sludge to produce aluminum-iron composite water purifying agent, this method mainly adopts iron-containing waste acid and aluminum hydroxide sludge to stir and react to produce, take The supernatant after the reaction is the aluminum-iron liquid composite water purifier, which turns waste into treasure, the preparation method is simple, no secondary pollution but cannot be reused

[0010] Chinese patent application (notification number: CN104986837A), patent name: a preparation method of polyaluminum sludge molding phosphorus removal material, the method is to add polyaluminum sludge from a water supply treatment plant to an aqueous slurry containing zeolite powder and bauxite powder In the coagulant of raw materials and various components, the obtained powdery polyaluminum sludge is granulated and molded and roasted at high temperature to obtain the phosphorus removal filler. This method is simple in process, easy to separate after use, and can be recycled. complex and energy consuming

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