JPS5852720B2 - Fermentation treatment equipment for sewage sludge, etc. - Google Patents

Description

Detailed Description of the Invention The present invention is a fermentation treatment device for sewage sludge, etc., which ferments and decomposes livestock manure, screen sludge collected from sewage treatment plants, sewage sludge, urban sludge, etc. using aerobic microorganisms and turns it into compost. It is related to.

The purpose of the present invention is to prevent sewage sludge, etc. to be subjected to fermentation treatment, which is introduced into one fermentation tank, from becoming compacted.
In addition, sufficient contact with air is achieved without using a rocking device,
The present invention is intended to effectively carry out fermentation treatment, and the present invention will be described in detail below based on illustrated embodiments.

In the figure, 1 is the main body of the fermentation treatment equipment, which has a capacity to ferment sewage sludge, etc. at one time, and has a chevron-shaped upper part 2, with a taper angle greater than the angle of repose, and is supplied from the top. Sewage sludge, etc. is supplied uniformly to the entire device by a conveyor or the like 5.

In addition, the shape of the lower part 3 of the main body 1 is made into an inverted M-shape, which is completely opposite to the shape of the upper part, with the center of the bottom protruding upward and both sides concave, and fermented compost is formed on the outer walls of both sides. A discharge port 4 is provided to take out sewage sludge, etc.

Further, a large number of chevron-shaped regulating plates 6 are arranged in the main body 1 at required intervals in the horizontal direction, and a plurality of regulating plates 6 are also installed in a plurality of stages in the vertical direction of the main body.

At this time, the regulation plates 6 in the vertical direction are arranged in a staggered manner, so that the fermented material falling from the upper stage falls onto the chevron-shaped regulation plate on the lower stage, thereby being dispersed and loosened.

An air supply pipe 7 is arranged inside the chevron-shaped regulation plate of each stage to supply air or heated air necessary for fermentation from outside the main body.

Although it is possible to provide this air supply pipe γ on all the regulation plates of all stages, it is necessary to supply and exhaust air alternately at each stage so that the air can be supplied uniformly throughout the main body and the air supply is smooth. Sometimes.

Further, the regulation plates 6 installed in the main body 1 are arranged perpendicularly to the regulation plate on the upper stage for each step or every 1st or 2nd stage, so that the objects to be processed that fall from above sequentially through the regulation plates are placed inside the main body. The mixture is dispersed in the front, rear, left and right directions for even more mixing and agitation.
It is also possible to improve the efficiency of contact with air and to uniformly ferment the material to be treated.

Note that 8 in the figure indicates an exhaust pipe.

Then, sewage sludge,
When fermenting screen residue, urban waste, etc., after regulating the moisture content necessary for trenchless fermentation, it is fed into the feeding conveyor 5 from the top of the main body 1, and it is fed to the chevron-shaped regulation plate at each stage. It reaches the bottom of the main body 1 after passing between the regulating plates of each stage while colliding and being dispersed.

The main body is filled by sequentially supplying sewage sludge, etc.

When the sludge and the like are supplied, an aerobic atmosphere is formed in which air is supplied, and the microorganisms (aerobic fermentation bacteria) contained in this atmosphere decompose and ferment.

This fermentation is carried out at each stage of the regulating plate, and the fermentation process progresses from the top to the bottom, and when the bottom is reached, the desired fermentation is completed and the material is composted.

Therefore, the size of the main body 1 and the number of stages of the regulating plates are determined in advance based on this fermentation time and the like.

When the fermented sludge, etc. is taken out and discharged onto the discharge conveyor 9 provided at the bottom of the discharge port 4, the sludge, etc. undergoing fermentation inside the main body is sequentially moved from the upper part to the lower part, and this movement Sometimes it is dispersed and stirred to prevent compaction.

In this way, air is continuously supplied and exhausted into the main body, thereby promoting the fermentation of organic matter and reducing the moisture content.

When a space is created in the upper part of the main body, the supply conveyor is operated again to supply sewage sludge, etc. to fill the main body.

In the apparatus according to the present invention, fermentation of sludge, etc. is carried out continuously in each stage within the main body as described above, but the regulation plates, which are chevron-shaped and arranged in a staggered manner, are used to separate the fermentation from the upper stage to the lower stage. As the sludge and other objects become compacted due to their own weight, the regulation plates receive a distributed load, which prevents compaction even if the height of the main body increases, and maintains an aerobic atmosphere. This promotes fermentation, and since the supply and exhaust pipes are installed inside the chevron-shaped regulation plate, the distance that air travels through the sludge is shortened, resulting in less ventilation resistance and the need for a smaller blower capacity, reducing power consumption. As well as adjusting the amount of air supplied and exhausted from each stage, ventilation can be performed according to the degree of fermentation.Furthermore, the upper part of the main body is shaped like a chevron, the angle of which is equal to or greater than the angle of repose, and the bottom part is opposite to the upper part. Because of this, sludge, etc. can be moved evenly throughout the main body, and has many advantages.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional front view, FIG. 2 is a side view of the same, and FIG. 3 is a diagram of an actual embodiment. 1...Body, 2...Top, 3...
... Lower part, 4 ... Discharge port, 5 ... Supply conveyor, 6 ... Regulation plate, 7 ... Air supply pipe, 8 ... ...Exhaust pipe, 9...Discharge conveyor.

Claims (1)

[Claims] 1. In the main body of the fermentation processing equipment, the fermented material is introduced from the upper part and the fermented material is taken out from the lower part, and a plurality of chevron-shaped regulation plates are installed at the required intervals in both the horizontal and vertical directions. At the same time, the upper and lower regulating plates are arranged in a staggered manner, and an air supply pipe or an exhaust pipe is arranged within the chevron shape of the regulating plate to create an aerobic atmosphere inside the main body. A fermentation treatment device for sewage sludge, etc., characterized in that the angle of the chevron is greater than the angle of repose, and the bottom is reversed so that sludge, etc. can flow down uniformly throughout the main body.