CN101768542A

CN101768542A - Peristaltic anaerobic solid-state fermentation device used for organic acid fermentation

Info

Publication number: CN101768542A
Application number: CN 201010113580
Authority: CN
Inventors: 陈洪章; 张翔
Original assignee: Institute of Process Engineering of CAS
Current assignee: Institute of Process Engineering of CAS
Priority date: 2010-02-24
Filing date: 2010-02-24
Publication date: 2010-07-07
Anticipated expiration: 2030-02-24
Also published as: CN101768542B

Abstract

The invention discloses a peristaltic anaerobic solid-state fermentation device used for organic acid fermentation. The invention is characterized in that a stub driven by electricity and connected on a fixed shaft can sway along the axle center to strengthen the motion of the solid-state material in a reactor, thereby improving the mass and heat transfer in the reactor and reducing the energy consumption; a filter layer is arranged in the device for realizing the solid-liquid separation of the material; acidizing fluid rich in thalluses stored under the filter layer is conveyed to the top of a pot body by a peristaltic pump and then sprayed on the material uniformly by a spraying head for secondary fermentation, thereby being favorable for further shortening the fermentation period and saving water and energy.

Description

A kind of creeping motion type is used for the anaerobic solid-state fermentation device of organic acid fermentation

[technical field]

The invention belongs to the organic acid fermentation field, specially refer to creeping type anaerobic solid-state fermentation organic acid device.

[background technology]

Along with the development of socio-economic activity and production, the human living standard is able to rapid raising, but thereupon many environmental problems also occurred, and increasing solid waste is one of them.Be rich in degradable organism mostly as agricultural wastes, daily life rubbish etc. in the solid waste, through microbiological deterioration, can be converted into valuable product, can reduce environmental pollution, can bring certain economic benefits again, so the anaerobic fermentation technology of solid waste is a technology that has a extensive future.

In the whole technique link of anaerobic solid-state fermentation, the acidication of solid waste is one of its rate-limiting step, and the acidication of therefore strengthening solid waste is to shorten the solid waste anaerobic digestion cycle, improves an emphasis of digestive efficiency.A difficult point in the solid waste acidication process is exactly the inequality of heat transfer, mass transfer, traditional mode is by add agitator in reactor solid substances to be stirred, come enhancement of heat transfer, mass transfer, but, cause stirring operation energy consumption height, weak effect, its shearing force again to consequences such as microbial growth work the mischief because fermentation materials is highly filled.

[summary of the invention]

At the deficiency that exists in the above-mentioned solid waste anaerobic acidification process, the present invention has proposed following scheme for solving this difficult problem: utilize bionics technical modelling food limit wriggling in stomach and intestine, the process of limit digestion has designed the anaerobic solid-state fermentation device that a kind of creeping motion type is used for organic acid fermentation.Its feature is as follows: this device comprises tank body, opening for feed, discharge port, venting port, stationary shaft, stub, spray thrower, peristaltic pump, filtering layer etc., be provided with four groups of stubs that are vertical arrangement in tank interior, stub is that axial motion is done in the center of circle with the stationary shaft, drives the motion of reactor internal solid material, and material is wriggled on the inside reactor limit, the limit digests, thereby has strengthened mass transfer, the heat transfer of inside reactor solid substances.By filtering layer solid substances is trapped in the filtering layer place, the acidizing fluid that produces is stayed in lower floor's jar, to be rich in the zymophyte acidizing fluid from what filtering layer was stored down, be back to reactor head by peristaltic pump, and evenly be sprayed on the solid substances through spray thrower, carry out Secondary Fermentation, this can not only effectively accelerate the acidication speed of solid substances, and need not additionally to add water and make organic acid keep higher concentration.

Reinforcement organic acid solid-state fermentation installation according to technical scheme provides is characterized in that: have four row stubs in the tank body and fix on it by stationary shaft, every an angle of 90 degrees row of arranging, every row are made up of 3-20 stub;

Reinforcement organic acid solid-state fermentation installation according to technical scheme provides is characterized in that: at equally distributed 4 stubs of the sustained height of tank body, be that swing with horizontal direction work ± miter angle in the axle center with the stationary shaft;

Reinforcement organic acid solid-state fermentation installation according to technical scheme provides is characterized in that: stub length is 1 with the ratio of reactor diameter: 10-1: 100.

[advantage of the present invention]

The present invention compares with existing conventional solid waste anaerobic digestion organic acid device and has the following advantages: (1) structure of reactor is simple, by the swing of stub, solid substances is pushed, rubs, thereby strengthened mass transfer, the heat transfer of solid substances; (2) improved the stability of system, and effectively shortened the solid substances anaerobic digestion organic acid cycle, cut down the consumption of energy, thereby improved production efficiency.

[description of drawings]

Fig. 1 is this schematic representation of apparatus

Fig. 2 is the A-A sectional view of this device

1 is venting hole among the figure, and 2 is opening for feed, and 3 is spray thrower, and 4 is axial brake device, and 5 is stationary shaft, and 6 is tank wall, and 7 is stub, and 8 is filtering layer, and 9 is discharge port, and 10 is peristaltic pump.

[specific implementation method]

Embodiment 1

Will be through the quick-fried pretreated maize straw of vapour and daily life rubbish thorough mixing outside jar, the anaerobic sludge of sewage work is taken from inoculation, moves in the reactor sealing, the fermentation of beginning organic acid then in the lump from opening for feed.Cycle is 10 days, temperature is controlled at 35-40 ℃, during the fermentation, the stub of inside reactor is done ± the miter angle swing for the axle center along continuous straight runs with the stationary shaft, every 30min once, being in symmetric two stubs of sustained height during swing is one group, and with another the group alternating action on material, by the crisscross motion between stub, the motion of enhanced reactor internal solid material.In the fermenting process, every 8 hours, the acidizing fluid with being stored under the filtering layer was transported to the tank top through peristaltic pump, evenly was sprayed onto the material top by spray header, realized its internal recycling, kept and produced sour dominant microflora, quickened the acidifying of solid substances.After the fermentation ends, collect acidizing fluid.

Claims

1. a creeping motion type is used for anaerobic solid-state fermentation organic acid device, comprise tank body, opening for feed, discharge port, venting port, stationary shaft, stub, spray thrower, peristaltic pump, filtering layer are provided with four groups of stubs that are vertical arrangement in tank interior, stub is that axial motion is done in the center of circle with the stationary shaft, drives the motion of reactor internal solid material.

2. a kind of creeping motion type as claimed in claim 1 is used for solid state fermentation organic acid device, it is characterized in that: the stub that is installed in tank interior is that the axle center swings back and forth with the stationary shaft.

3. a kind of creeping motion type as claimed in claim 1 is used for solid state fermentation organic acid device, it is characterized in that: have four row stubs in the tank body and fix on it by stationary shaft, every an angle of 90 degrees row of arranging, every row are made up of 3-20 stub.

4. a kind of creeping motion type as claimed in claim 1 is used for solid state fermentation organic acid device, it is characterized in that: stub is that swing with horizontal direction work ± miter angle in the axle center with the stationary shaft.

5. a kind of creeping motion type as claimed in claim 1 is used for solid state fermentation organic acid device, it is characterized in that: stub length is 1 with the ratio of reactor diameter: 10-1: 100.