Regular iron-carbon micro-electrolysis filler and preparation method thereof

Abstract

The invention discloses a regular iron-carbon micro-electrolysis filler and a preparation method thereof, belonging to the technical field of sewage treatment. The filler comprises the following components by weight percent: 50 to 80 percent of scrap iron with the diameter is 0.1 to 1 mm , 5-17 percent of powdery active carbon with the diameter of less than 0.1 mm and 15-35 percent of clay with diameter of less than 0.15 mm. The preparation method of the iron-carbon micro-electrolysis filler comprises the following steps of: a, uniformly mixing the filler according to the weight percentages; b, adding water to make the mixture into granular filler with the diameter of 3 to 10 mm; c, putting the filler into an oven and drying at 30 to 50 DEG C; d, moving the filler into a muffle furnace and baking for 2 to 4 hours at 250 to 600 DEG C in an oxygen-isolated condition; and e, cooling after the filler is baked to obtain the regular iron-carbon micro-electrolysis filler. The invention prevents hardening and passivation of the iron-carbon micro-electrolysis filler, is easy to fill and has advantages of good sewage treatment effect, low cost and easy preparation.

Description

technical field [0001] The invention belongs to the technical field of iron-carbon micro-electrolysis sewage treatment methods, and in particular relates to a preparation method of iron-carbon micro-electrolysis filler. Background technique [0002] Micro-electrolysis is a good process for treating wastewater by using the principle of metal corrosion to form a primary battery. It is also called internal electrolysis, zero-valent iron method, iron filings filtration method, and iron-carbon method. It is a widely researched and applied Wastewater treatment technology has received extensive attention in recent years because of its simple process, convenient operation, and the goal of "treating waste with waste". [0003] However, a large number of research results show that there are many defects in the application of this method. After the filler has been in operation for a period of time, it is prone to agglomeration and channeling due to the corrosion of iron, which reduces ...

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Problems solved by technology

[0003] However, a large number of research results show that there are many defects in the application of this method. After the filler has been in operation for a period of time, it is prone to agglomeration and channeling due to the corrosion of iron, which reduces the treatment effect of the iron-carbon micro-electrolysis filler, and at the same time, iron filings will form on the surface. A layer of metal oxide and hydroxide film, resulting in the passivation of iron filings, which leads to the interruption of the micro-electrolysis process and affects the treatment effect