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Preparation method of biological carbon particles

A technology of biochar and biochar, which is applied in the field of biomass resource utilization, can solve the problems that restrict the resource utilization of sludge, and achieve the effects of significant adsorption performance, performance improvement, and large specific surface area

Inactive Publication Date: 2017-11-21
ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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Problems solved by technology

As a by-product of sewage treatment, although sludge contains a large amount of nutrients such as nitrogen and phosphorus, it also contains harmful substances such as pathogenic bacteria and heavy metals, especially heavy metals, which seriously restrict the resource utilization of sludge.

Method used

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  • Preparation method of biological carbon particles
  • Preparation method of biological carbon particles
  • Preparation method of biological carbon particles

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Embodiment Construction

[0041] Since powdered biochar is not conducive to its use as a matrix or filler, the direct preparation of biomass into larger biochar particles is expected to improve its performance and broaden its application range. Based on this, the present invention provides a method for preparing biochar particles by co-pyrolyzing water hyacinth and sludge using water hyacinth and sludge as raw materials.

[0042] Water hyacinth can be wild water hyacinth growing in rivers and lakes, or water hyacinth used for sewage treatment. After cultivating the water hyacinth in clean water for a period of time, wash the weeds and sludge on the plant with deionized water, place it on a dry ground to dry naturally for 1-2 days, and then place it in an oven at 80°C for drying Dry for 24 hours, put the dried water hyacinth in a plastic bag and roughly crush it, then use a grinder to further crush it. The crushed powder is sieved with a 50-mesh sieve, and the fine water hyacinth powder under the sieve ...

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Abstract

The invention discloses a preparation method of biological carbon particles, comprising the steps of 1, washing water hyacinth; 2, air-drying the water hyacinth; 3, drying the water hyacinth; 4, crushing the dried water hyacinth, and screening; 5, preparing sludge that has a water content of 65-75%; 6, mixing the sludge of step 5 and the water hyacinth powder of step 4; 7, making the mixture into particulate sludge; 8, pyrolyzing the particulate sludge into biological carbon particles; 9, soaking the biological carbon particles in dilute hydrochloric acid; 10, washing the biological carbon particles with deionized water until neutrality; 11, baking the biological carbon particles. Biological carbon that has highly-developed pores, large specific surface area and rich active surface functional groups and having significant adsorbing property for heavy metals can be used as an adsorbent to adsorb pollutants in soil or water so as to arrive at environmental restoration.

Description

technical field [0001] The invention relates to the field of biomass resource utilization, in particular to a method for preparing biochar particles by co-pyrolysis of water hyacinth sludge. Background technique [0002] Water hyacinth, as one of the most harmful aquatic plants in the world, has a large area and frequent outbreaks in the waters of many provinces in southern my country, seriously affecting the water environment and its ecosystem, and has a great negative impact on water traffic and flood control safety. As a by-product of sewage treatment, although sludge contains a large amount of nutrients such as nitrogen and phosphorus, it also contains harmful substances such as pathogenic bacteria and heavy metals, especially heavy metals, which seriously restrict the resource utilization of sludge. Therefore, the treatment and disposal of sludge and water hyacinth has become an important issue in the field of environmental protection. Contents of the invention [00...

Claims

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Application Information

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IPC IPC(8): C01B32/05B01J20/20B01J20/30C02F1/28C02F3/32C02F101/20
CPCC02F1/283B01J20/20B01J2220/485B01J2220/4887C01P2006/12C01P2006/14C02F3/32C02F2003/003C02F2101/20
Inventor 徐大勇裘秀群洪亚军毛祥姚巧凤谢韦郭沈娟
Owner ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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