Iron-carbon filler for urine treatment and preparation method thereof

Abstract

The invention relates to the technical field of water treatment, and particularly discloses an iron-carbon filler for urine treatment and a preparation method of the iron-carbon filler. The iron-carbon filler comprises the following components in parts by mass: 50-80 parts of iron powder, 20-30 parts of carbon powder, 5-10 parts of carbon fibers, 1-5 parts of an additive and 5-10 parts of a binder. The preparation method of the iron-carbon filler comprises the following steps: uniformly mixing the iron powder, the carbon powder, the carbon fiber, the additive and the binder in parts by mass, heating to 140-200 DEG C, stirring, granulating, cooling and drying to obtain iron-carbon filler particles. The iron-carbon filler provided by the invention has an excellent galvanic couple effect, can realize continuous automatic release of iron ions and maintain an internal and external high-conductivity path for a long time under the condition of not applying external electric energy, realizes efficient removal of nitrogen, phosphorus and organic matters in urine wastewater, is simple in preparation method, and expands the application range of the iron-carbon filler.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to an iron-carbon filler for urine treatment and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of my country's high-speed rail technology, the construction of green high-speed rail has become an important goal of my country's high-speed rail construction. During the process of carrying passengers, high-speed rail trains will generate a large amount of fecal waste water, which contains high concentrations of nitrogen, phosphorus and organic matter and other pollutants. Since phosphorus is a key factor in the eutrophication of water bodies, the removal of phosphorus in urine is particularly important. As an effective method for phosphorus removal, iron-carbon filler mainly promotes iron-carbon corrosion and accelerates phosphorus removal through micro-electrolysis. However, there are certain potential safety hazards i...

AI Technical Summary

Problems solved by technology

There is a natural coupling defect between the carbon powder and the iron powder, specifically: in the early stage of the reaction, the conductive path inside and outside the iron-carbon particle is smooth, that is, the inside and outside have relatively consistent conductivity, and the iron electrons inside the particle It reacts with the oxygen adsorbed on the surface of the carbon cathode to produce a galvanic battery reaction; however, as the reaction progresses, an iron hydroxide passivation layer is formed on the surface of the iron-carbon electrode, which hinders further contact between the air and the internal iron-carbon material, and eventually leads to The material cannot be fully utilized, so that it cannot maintain a continuous iron-carbon reaction and maintain a high-conductivity path inside and outside

Therefore, the current iron-carbon fillers have defects such as cumbersome preparation process, coupling defects, insufficient material utilization, and inability to maintain continuous iron-carbon reaction and maintain high internal and external conductive paths, which seriously affect its application range.

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