JPS598197B2 - Fermentation equipment for fermented materials - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fermentation apparatus for treating organic matter such as sewage sludge by aerobic fermentation.

Organic matter such as sewage sludge and livestock manure has a high moisture content and is difficult to undergo aerobic fermentation.

For this purpose, rice husks, bark grains, sawdust, etc. are added to sewage sludge, etc.
After adding and mixing small pieces of rice straw, etc. to adjust the moisture content and air permeability to suit aerobic fermentation, the mixture is put into a fermenter and air is supplied and exhausted to perform the desired fermentation process. ing.

However, due to the nature of this fermented material, it has a high moisture content and remains sticky until the primary fermentation is almost completed, so it is easier to carry out the primary fermentation by periodically turning the fermented material.

Furthermore, after the primary fermentation, the moisture content is low and the fermented material becomes bulky, and the aeration becomes better than immediately after being added to the fermentation tank.

The present invention aims to carry out fermentation treatment effectively and with a simple device by utilizing such properties in the fermentation process of a material to be fermented.

The present invention will be explained below based on illustrated embodiments.

In the figure, 1 is a multi-stage vertical fermenter having the required internal volume, and an input port 1a is provided at the top of the fermenter 1, and a belt conveyor or other input device 2 is used to preliminarily feed sewage sludge, etc. The material to be fermented is adjusted to have a moisture content and air permeability suitable for fermentation, and the material to be fermented is placed in the upper part of the tank as needed. A stowage conveyor 3 is provided so that the objects can be leveled and stacked.

The inside of this fermenter 1 is divided into two.

This consists of a primary fermentation chamber whose upper part is designed to carry out the primary fermentation smoothly, and a secondary fermentation chamber which is installed at the lower part of the primary fermentation chamber so that the fermented proboscis after the primary fermentation can undergo secondary fermentation. Chamber A and secondary fermentation chamber B are separated only by a trapdoor 4 at the bottom of the primary fermentation chamber, and when this trapdoor is opened, there is no partition wall between the chambers.

4. Trap doors at predetermined intervals in the vertical direction of the primary fermentation chamber A.
4... is installed, and the stage chamber AHmA2mA3 is installed in a multistage manner.
The trapdoor 4 which forms the .
The material is dropped from the upper step chamber to the lower step chamber while being turned back and forth at fixed or arbitrary time intervals.

In order to perform aerobic primary fermentation in each stage chamber, an air supply pipe 5 is installed so that air supply and exhaust can be carried out simultaneously or selectively and alternately.
, and exhaust pipes 6 are provided, respectively.

This air supply and exhaust is also performed in the secondary fermentation chamber B, which will be described later.

In this way, aerobic fermentation is carried out in each stage of the multi-tiered vertical primary fermentation chamber, and the fermented material reaches the lowest stage of the primary fermentation chamber, where it has undergone the specified primary fermentation process, and is in the tank. It is in a messier state than when it was put inside.

When the trapdoor 4 in the lowest chamber opens (or rotates in a rotary type), the material to be fermented falls from the primary fermentation chamber A into the secondary fermentation chamber B.

This secondary fermentation chamber B has the shape of one large hopper, and is provided with a regulating plate 7 so that the fermented material supplied to the chamber is not compacted.

This regulation plate 7 consists of a large number of plates arranged at arbitrary intervals in the horizontal direction, and is placed 2 meters above the plate in the vertical direction to prevent the fermented material in the hopper-shaped secondary fermentation chamber from being compacted. .

This serves the intended purpose by allowing the regulating plate to support part of the weight of the fermented material and also to separate and stir the fermented material that collides with the regulating plate.

Further, although the regulating plates 7 may be umbrella-shaped and arranged in a staggered manner as shown in the figure, other methods may also be adopted.

Air can be supplied into the secondary fermentation chamber through a regulating plate as shown in the figure, but it is also possible to directly insert an air supply pipe into the secondary fermentation chamber or other methods.

At the bottom of the secondary fermentation chamber, a discharge device 8 such as a belt conveyor is provided to discharge the fermented material after fermentation, that is, a product that can be used as fertilizer, out of the tank.

The discharge device 8 may be a belt conveyor, a hopper set, a slide gate type, a cutter gate type, or the like.

According to the present invention, a multi-stage vertical fermentation tank is provided with a primary fermentation chamber in which multi-stage chambers are formed using a trap door in the upper part, and a hopper-shaped secondary fermentation chamber in the lower part. During relatively high primary fermentation, a multi-tiered chamber is formed using a trap door and the chamber is turned and dropped, allowing for smooth primary fermentation.In addition, the secondary fermentation chamber is shaped like a hopper and does not require any mechanical parts, making the structure simple. Moreover, there is an advantage that the fermentation process can be carried out according to the properties of the fermented material during the fermentation process.

[Brief explanation of the drawing]

The drawing is a sectional view of the fermentation apparatus of the present invention. 1...Fermentation tank, 1a...Input port, 2.
... Loading device, 3 ... Loading conveyor, 4
...Trap door, 5...Air supply pipe, 6...
...Exhaust pipe, 7...Regulations, 8...
Discharging device, A...Primary fermentation chamber, B...Secondary fermentation chamber.

Claims (1)

[Claims] 1. A primary fermentation chamber in a multi-tiered vertical fermenter, which is configured to have a trap door that can be opened and closed at the top of the fermenter to create an aerobic atmosphere inside the fermenter, allowing the material to be fermented to fall to the lower stage. The lower part of the fermenter is made up of a large number of umbrella-shaped regulating plates arranged in a staggered manner in multiple stages to form a secondary fermentation chamber, and air supply and exhaust pipes are connected to the lowest stage of the regulating plates of the secondary fermentation chamber. Fermentation equipment for fermented materials.