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Preparation method of light biological filter material

A biological filter material, lightweight technology, applied in chemical instruments and methods, biological water/sewage treatment, granular microbial carrier treatment, etc., can solve the problems of high calcination temperature, poor hydrophilicity, small specific surface area, etc. High oxygen efficiency, meeting environmental emission standards, and high strength

Active Publication Date: 2020-04-17
NANJING GONGCHENG RES INST OF ENERGY CONSERVATION & NEW MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing lightweight biological filter materials still have disadvantages such as high calcination temperature, small specific surface area, poor hydrophilicity, etc.

Method used

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  • Preparation method of light biological filter material

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Effect test

Embodiment 1

[0022] A kind of preparation method of light biological filter material, the mass parts composition of described biological filter material is as follows: 60 parts of steel slag, 12 parts of humic acid, 2 parts of ammonium carbonate, 0.6 part of binder, 10 parts of water, described preparation The method includes the following steps:

[0023] (1) Weigh steel slag, humic acid, ammonium carbonate and binder in proportion, add water and mix evenly, prepare into balls in a ball forming machine, the diameter of the spheres is 3mm, then transfer to an oven for drying, dry The temperature is 100°C, the drying time is 45min, and then it is transferred to the muffle furnace for calcination for 2.5h, the calcination temperature is 450°C, and after the calcination is finished, it is naturally cooled to room temperature to obtain a semi-finished biological filter material; the steel slag in this embodiment is The steel slag obtained after sieving, iron removal and grinding is carried out ...

Embodiment 2

[0026] A kind of preparation method of light biological filter material, the mass parts composition of described biological filter material is as follows: 65 parts of steel slag, 12 parts of humic acid, 2 parts of ammonium carbonate, 0.6 part of binder, 10 parts of water, described preparation The method includes the following steps:

[0027] (1) Weigh steel slag, humic acid, ammonium carbonate and binder in proportion, add water and mix evenly, prepare into balls in a ball forming machine, the diameter of the spheres is 5mm, then transfer to an oven for drying, and dry The temperature is 110°C, the drying time is 50min, and then it is transferred to the muffle furnace for calcination for 2.5h, the calcination temperature is 450°C, and after the calcination is completed, it is naturally cooled to room temperature to obtain a semi-finished biological filter material; the steel slag in this embodiment is The steel slag obtained after sieving, iron removal and grinding is carried...

Embodiment 3

[0030] A kind of preparation method of light biological filter material, the mass parts composition of described biological filter material is as follows: 70 parts of steel slag, 15 parts of humic acid, 5 parts of ammonium carbonate, 0.7 part of binder, 20 parts of water, described preparation The method includes the following steps:

[0031] (1) Weigh steel slag, humic acid, ammonium carbonate and binder in proportion, add water and mix evenly, prepare into balls in a ball forming machine, the diameter of the spheres is 6mm, and then transfer them to an oven for drying. The temperature is 110°C, the drying time is 50min, and then it is transferred to a muffle furnace for calcination for 2.8h, the calcination temperature is 500°C, and after the calcination is completed, it is naturally cooled to room temperature to obtain a semi-finished biological filter material; the steel slag in this embodiment is The steel slag obtained after sieving, iron removal and grinding is carried ...

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Abstract

The invention relates to the technical field of filter materials, and in particular, relates to a preparation method of a light biological filter material. The biological filter material is prepared from the following components in parts by mass: 60-80 parts of steel slag, 12-18 parts of humic acid, 2-8 parts of ammonium carbonate, 0.6-0.8 part of an adhesive and 10-30 parts of water. The preparation method comprises the following steps: (1) weighing steel slag, humic acid, ammonium carbonate and the adhesive in proportion, adding water, uniformly mixing, preparing into balls in a ball formingmill, transferring into a drying oven, drying, calcining, and cooling to obtain a semi-finished product; (2) soaking the biological filter material semi-finished product obtained in the step (1) in anutrient solution for 30-45 min, and carrying out microbial inoculation for 5-7 d, to obtain the biofilm-culturing biological filter material. According to the prepared light biological filter material, the sewage treatment efficiency per unit volume is improved by 7-8 times compared with that of a conventional filter material, the environment-friendly emission standard can be met, the oxygenating efficiency is high, energy consumption is reduced, and the problem that the treatment efficiency is reduced due to the fact that the material surface is not uniform after an existing filter materialruns for a period of time is solved.

Description

technical field [0001] The invention relates to the technical field of filter materials, in particular to a preparation method of lightweight biological filter materials. Background technique [0002] Lightweight ceramsite filter material is a new type of biofilm carrier filler, which has the advantages of light weight, large specific surface area, and strong adsorption capacity. Suitable for various types of filter tanks. Compared with quartz sand, the specific surface area is 2-3 times that of quartz sand with the same volume, and the porosity is 1.3-2.0 times that of quartz sand. Compared with sand filtration, the average filtration rate is high (20-25m / h), the water yield is large, the filtration cycle is long, the flushing frequency is small, and the flushing intensity is low. It is not only suitable for urban and industrial water supply treatment, but also suitable for biochemical (oil, iron, manganese, etc.) treatment of metallurgy, petroleum, chemical, and textile ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/00C04B33/138C04B38/02
CPCC02F3/00C04B33/138C04B33/1328C04B38/02C04B2235/656C02F2003/001Y02P40/60
Inventor 余心宏刘东孙俊杰邹丹
Owner NANJING GONGCHENG RES INST OF ENERGY CONSERVATION & NEW MATERIALS TECH CO LTD
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