Unlock instant, AI-driven research and patent intelligence for your innovation.

A device and method capable of controlling oxidation-reduction potential to promote dry anaerobic fermentation of sludge

A dry anaerobic and potential technology, applied in the field of solid waste recycling, to reduce the impact, expand the suitable growth area, and have a large production capacity per unit volume.

Active Publication Date: 2016-08-24
TONGJI UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are no reports at home and abroad that use DC voltage to directly control the oxidation-reduction potential of high-solids anaerobic digestion to increase methane yield.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A device and method capable of controlling oxidation-reduction potential to promote dry anaerobic fermentation of sludge
  • A device and method capable of controlling oxidation-reduction potential to promote dry anaerobic fermentation of sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Such as figure 1 and figure 2 As shown, the device is composed of a fermentation tank body 9, an agitator, a motor 12, an anode 2, a cathode 3, a low-voltage DC power supply 1, a wire and a conductive material, wherein: the agitator adopts a double-layer ribbon agitator 7, which is electrically conductive Material 4 is made of carbon fiber conductive material. The fermentation tank body 9 is a cylindrical structure with a rotating shaft 13 at its axis. The double-layer ribbon agitator 7 is horizontally positioned on the rotating shaft 13, and the two ends of the rotating shaft 13 protrude from the fermentation tank. Outside the body 9, one end of the rotating shaft 13 is socketed with the anode 2, and the anode extends into the fermentation tank body 9. The end of the rotating shaft 13 is connected to the transmission 11 through the coupling 10, and the transmission 11 is connected to the motor 12. The tank of the fermentation tank body 9 A cathode 3 is provided on th...

Embodiment 2

[0026] The device described in Example 1 was used to further increase the solid content of the material in the reactor. First, add 6.0kg of inoculated sludge and 3kg of dewatered sludge to the fermentation tank, and operate in the mode of feeding and discharging once a day. The SRT is set to 20 days. During the start-up stage of the reactor, feed 450g into the reactor every day. Dewater sludge (solid content is generally 20%), while adjusting the output quality according to the gas volume (generally 1L of gas produced consumes 1g of organic matter), and gradually increase the organic load, when the solid content of the digestate in the reactor reaches the set When the level is fixed, the feed is adjusted to a level of 20% solid content by adding dewatered sludge and tap water. Adjust the rotation speed of the double-layer ribbon agitator to 60r / min, alternately run at the rotation / stop mode of 10min / 10min, control the temperature of the material in the fermentation tank to 55°...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
densityaaaaaaaaaa
solid contentaaaaaaaaaa
Login to View More

Abstract

The invention relates to a device capable of controlling redox reduction potential to promote sludge dry method anaerobic fermentation, the device can control the redox reduction potential to promote sludge dry method anaerobic fermentation, mainly comprises a fermentation tank, a stirrer, a motor, an anode, a cathode, a low-voltage direct current power supply, a wires and a carbon fiber conductive material, and is characterized in that: the stirrer is located horizontally in the axis of the fermentation tank, an axial stirring rod is sleeved and connected with the anode, the cathode is located on the wall of the fermentation tank, the carbon fiber conductive material is paved on the inner wall of the fermentation tank body, the low-voltage direct current power supply is arranged outside the fermentation tank body, and the anode and the cathode are connected through two wires. In order to improve the methane yield of sludge dry anaerobic fermentation, the redox reduction potential of the inner wall of the fermentation tank body can be controlled at -400mV by passing the additional direct current power supply through the carbon fiber conductive material so as to provide optimum growth redox environment for methane producing bacteria to achieve the object of methane producing bacteria enrichment and methane yield improvement. The solid content of the dry method fermented sludge is 10 ~ 20%.

Description

technical field [0001] The invention belongs to the field of solid waste recycling, and in particular relates to a device and method capable of controlling oxidation-reduction potential to promote methane production by sludge dry anaerobic fermentation. Background technique [0002] At present, environmental and energy issues have become a major issue affecting the sustainable development of human society, and anaerobic digestion technology has outstanding advantages in energy production and environmental protection. Using sludge anaerobic fermentation to recover biomass energy is in line with the route of sustainable development , which fully embodies the goals of reduction, harmlessness and recycling of solid waste. Anaerobic digestion is divided into wet / low solid content digestion (<10%) and dry / high solid content digestion (>10%) according to the solid content of the processed materials. Compared with traditional wet digestion processes, dry digestion The process...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/04
CPCC02F11/04
Inventor 戴晓虎李宁严寒戴翎翎董滨
Owner TONGJI UNIV