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Cyperus alternifolius biological carbon preparation method based on artificial wetland system and application of method

A technology of artificial wetland system and dry umbrella bamboo, applied in the field of biomass resource utilization, to achieve the effect of wide source of raw materials, improvement of soil and water purification, and realization of resource recycling

Inactive Publication Date: 2016-11-16
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there are no relevant reports on the preparation of biochar and its application by using dry umbrella bamboo at home and abroad.

Method used

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  • Cyperus alternifolius biological carbon preparation method based on artificial wetland system and application of method
  • Cyperus alternifolius biological carbon preparation method based on artificial wetland system and application of method
  • Cyperus alternifolius biological carbon preparation method based on artificial wetland system and application of method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Remove the roots and leaves of about 50g of fresh bamboo bamboo, intercept the better part of the middle fiber of the stem, wash the surface impurities with tap water, rinse with deionized water three times, and cut into small pieces with a size of 0.5cm;

[0027] (2) Biotoxicity detection (using luminescent bacteria method) was carried out on the blocky bamboo, and the measured LC 50 ppm should comply with the National Biological Toxicity Standard "Technical Specifications for Toxicity Identification of Chemicals" in Appendix 1-C "Acute Toxicity Grading Standard". The up-to-standard dry umbrella stem block sample was dried for 24 hours at a constant temperature of 105°C in a constant temperature drying box, and then carried out secondary drying for 6 hours in a freeze dryer;

[0028] (3) Pulverize the freeze-dried raw material into powder with a pulverizer, and pass through a 100-mesh sieve;

[0029] (4) Weigh 10g of powdered dry umbrella bamboo, place it in a por...

Embodiment 2

[0033] (1) Take 50g of fresh bamboo fiber stems, rinse with water for two to three times, then rinse with deionized water for two to three times, and cut into small pieces with a size of 1cm;

[0034] (2) As described in Example 1, the biotoxicity detection (adopting luminescent bacteria method) is carried out to the massive dry umbrella bamboo, and the sample up to the standard is placed in a spacious and ventilated place to dry naturally for 3 days, and then carry out 6 hours of secondary treatment in a freeze dryer. secondary drying; the freeze-dried raw material is crushed into powder with a pulverizer, and passed through a 100-mesh sieve;

[0035] (3) Weigh 10g of powdered dry umbrella bamboo, put it in a porcelain boat, put it into a tube furnace, and pre-flow nitrogen for 30 minutes; heat up to 400°C in 20 minutes, and keep it warm for 60 minutes; keep the closed state of the quartz tube of the tube furnace, and naturally After the temperature was lowered to room temper...

Embodiment 3

[0049] Take the dry umbrella bamboo biochar prepared in Example 1 or 2 as the medium purification layer. Apply the clean water layer to subsurface flow constructed wetlands, such as image 3 shown. The subsurface flow constructed wetland system is planted with bamboo plants, and the matrix soil layer from top to bottom is gravel topsoil layer 23.1, ceramsite layer 23.2, medium purification layer 23.3, ceramsite layer 23.2, and gravel layer 23.4 (the medium layer The ceramsite layer and the ceramsite layer can be laid several layers depending on the situation, and are not limited to this embodiment), and a water distribution pipe for distributing water to the medium purification layer is laid in a tiled manner between the ceramsite layer and the medium purification layer. Clean water pipes are laid on the stone layer.

[0050] The constructed wetland system is connected with a water pipe, and the sewage is passed into the constructed wetland system 23 from the water pipe 22, ...

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Abstract

The invention discloses a cyperus alternifolius biological carbon preparation method based on an artificial wetland system. The method includes the steps: (1) removing root leaves of fresh cyperus alternifolius, retaining stems, and cleaning, dicing and air-drying the fresh cyperus alternifolius; (2) drying and crushing the cyperus alternifolius stems reaching standards after toxicity detection, and screening the cyperus alternifolius stems by a 100-mesh screen; (3) roasting powdery cyperus alternifolius at high temperature under anaerobic or anoxic conditions to obtain cyperus alternifolius biological carbon. The biological carbon prepared by the method has good structural stability and can effectively adsorb heavy metal cadmium in water. The cyperus alternifolius discarded in an artificial wetland is sufficiently used, and a novel way is provided for dealing with heavy metal pollution.

Description

technical field [0001] The invention relates to the field of resource utilization of biomass, and in particular to a process for preparing biochar from the bamboo chrysanthemum based on an artificial wetland system. Background technique [0002] Cyperus alternifolius, also known as water bamboo and windmill grass, has straight stems and slender leaf-like involucres clustered on the stems in a radial shape. It is a perennial hygrophyte and emergent plant. Bamboo has a good ability to purify sewage, and has strong adsorption properties for nitrogen, phosphorus, potassium and heavy metals in sewage and sludge, so it is often used in constructed wetland systems. The preparation of biochar by using bamboo as raw material can not only effectively utilize the branches of bamboo that are cut down due to rapid growth, but also the biochar of bamboo can be used as a water purification material for sewage purification, for example, in multi-level urban non-point source pollution In th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F3/32C02F9/14C02F9/08
CPCY02W10/37B01J20/20B01J2220/42B01J2220/4825C02F1/283C02F1/30C02F1/52C02F3/32C02F9/00C02F2301/08C02F2305/10
Inventor 利锋谢晓杰郭文杰沈凯旋
Owner SOUTH CHINA UNIV OF TECH
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