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A method for anaerobic fermentation of cadmium-containing biomass

An anaerobic fermentation and biomass technology, applied in fermentation, biological sludge treatment, anaerobic digestion treatment and other directions, can solve problems such as unreported, achieve the effect of avoiding excessive acidification, improving stability and wide application range

Active Publication Date: 2019-05-03
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Up to now, there have been no reports on the regulation of the stability of the anaerobic fermentation process of cadmium-containing biomass and the technology to increase the gas production.

Method used

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  • A method for anaerobic fermentation of cadmium-containing biomass
  • A method for anaerobic fermentation of cadmium-containing biomass
  • A method for anaerobic fermentation of cadmium-containing biomass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Such as image 3 The shown anaerobic fermentation experimental device adopts an automatic stirring stainless steel fermentation system, the total volume of the tank is 30L, and the working volume is 20L. The specific steps of anaerobic fermentation include:

[0025] (1) High-temperature steam sterilization of the fermentation tank: empty the moisture in the insulation layer of the fermentation tank, connect the steam generator, use the steam generator to provide steam, heat the insulation layer, adjust the steam entry and removal speed, and increase the temperature in the fermentation tank Keep at 121°C for 30 minutes, then close the steam generator and the inlet and outlet valves to complete the sterilization.

[0026] (2) Add feed liquid into the fermentation tank through the feed port, the total solid concentration of the feed liquid is 8% (the total solid concentration is the dry weight of fermentation raw materials / (dry weight of fermentation raw materials+water we...

Embodiment 2

[0036] A method for preparing biogas by anaerobic fermentation of cadmium-containing biomass, comprising the steps of:

[0037] (1) The fermenter is sterilized by high-temperature steam, and the steps are the same as in Example 1.

[0038] (2) Add fermented raw materials, deionized water and nickel (as NiCl 2 ·6H 2 (2 added) feed liquid formulated, the total solid concentration of feed liquid is 8% (total solid concentration is fermentation raw material dry weight / (fermentation raw material dry weight+water weight)), stir evenly and place 2h, make fermentation broth system stable ; The fermentation raw material includes cadmium-containing biomass and cow dung, and the dry matter mass ratio of the two is 1:1;

[0039] (3) Fill the fermenter with nitrogen (N 2 ) for 5 minutes to expel the air in the fermenter, then immediately close the feed inlet, carry out anaerobic fermentation at 55.0°C, and collect the generated gas.

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Abstract

The invention discloses a method for anaerobic fermentation of cadmium-containing biomass, and belongs to the technical field of biomass anaerobic fermentation. The method aims to overcome the problems of low gas production efficiency and unstable gas production process of cadmium-containing agricultural crop stalks, an appropriate amount of nickel ions is added to a fermentation system includingthe cadmium-containing biomass before the start of the anaerobic fermentation, the mass ratio of cadmium and nickel is adjusted to (0.5-1.5): (1.5-2.5), the pH of fermentation broth is improved, excessive acidification is avoided, the stability of the fermentation process and gas production can be improved, environmental remediation and bio-energy production are combined, the technology is simpleand quick, low in cost, convenient in operation and maintenance, and wide in range of applications, and can be applied to the recycling of the biomass in rivers, ponds, wetlands and soil polluted by heavy metals.

Description

technical field [0001] The invention belongs to the technical field of anaerobic fermentation of biomass, and in particular relates to a method for anaerobic fermentation of cadmium-containing biomass. Background technique [0002] Environmental pollutants are in fact the wrong amount of resources placed in the wrong place at the wrong time. Among many environmental pollution remediation technologies, ecological restoration is considered to be a feasible environmental governance technology because of its low cost and environmental friendliness, especially for developing countries. The importance of ecological restoration technology in the field of water and soil heavy metal pollution restoration has become increasingly prominent. However, the treatment and disposal of biomass materials produced in the restoration process is an important issue, which limits the promotion of ecological restoration technology. Using these heavy metal-contaminated plants for anaerobic fermentat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P5/02C02F11/04C02F3/28B09C1/10C02F101/20
CPCB09C1/10C02F3/28C02F11/04C02F2101/20C02F2103/007C02F2209/06C12P5/023Y02E50/30
Inventor 张化永田永兰韩晓茜郝和王中玉黄海
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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