JPH0725621B2 - Organic waste composting equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to an apparatus for fermenting and composting sludge or organic waste such as livestock manure and garbage generated by wastewater treatment of municipal sewage, human waste, and the like.

[Problems to be Solved by the Invention]

The treatment of wastewater sludge and other organic wastes, which are generated in large quantities due to the concentration of population in cities, the spread of sewers, and the progress of urbanization, are currently serious problems. This sludge was incinerated or used as a landfill material, but the burden of incineration cost was large and there was a shortage of landfill disposal sites.

Compost produced by fermenting organic waste such as drainage sludge is effective for improvement of exhausted farmland, and it is in large quantity, and is attracting attention as a resource. However, in the process of fermenting and composting, there is a problem that a bad odor is generated, and at the same time, harmony with the surroundings and the landscape are disturbed to damage the environment, and a large site is required.

The present invention is intended to solve the above-mentioned problems, and the purpose thereof is to effectively utilize land, without damaging the environment, and can be treated on the premises of a sewage treatment plant or a human waste treatment plant, or in the vicinity of an urban area. It is to propose a composting device for organic waste.

[Means and Examples for Solving the Problems]

This apparatus for composting organic waste is an apparatus for fermenting and composting organic waste, which is buried in the ground, has a cylindrical shape, and is divided into donut-shaped multi-stages, and the raw sludge is divided into upper and lower stages. It is equipped with a primary and secondary fermenter located in multiple stages to be sequentially dropped and moved, and the primary fermenter is provided in a stage that rotates around a doughnut-shaped midpoint, and the position of receiving and dropping the raw sludge formulation from above and The dropping and feeding position of the primary fermentation sludge to the lower secondary fermentation tank can be adjusted by rotation, and an intake / exhaust system device and other auxiliary devices are arranged in the center of the donut shape. To do.

The embodiment will be described below.

In this example, the compost production capacity is 10 t / day, the amount of raw sludge received is 30 t / day.
It is a composting device for day (sewage treatment sludge equivalent to about 350,000 people), land area 420m ² (diameter 13.1m circle), height 10 above ground.
m, underground depth 46m, outer skeleton is reinforced concrete construction.

In FIG. 1, the composting device has a substantially cylindrical outer shape, the inside has a donut shape, and is partitioned in multiple stages. From the top, the sludge carry-in part A and the compost carry-out part B, the mixed crushing part C and the compost sieve part Part D, primary fermentation part E, multi-stage secondary fermentation part F, and shipping adjustment part G. In the central part of the donut shape, a carrying-out device H that goes out from the lower part of the fermentation section F and carries out the compost through the shipping adjustment section G to the upper part, an intake system device I that sends in the air necessary for fermentation and an exhaust system that sends out the exhaust gas. The device J and other auxiliary devices are stored.

In FIG. 2, the mixing and crushing section C includes a raw material blender 2 for feeding the raw material sludge in the sludge tank 1, a moisture adjuster blender 4 for supplying the moisture adjuster in the auxiliary material tank 3, an inoculum for inoculum supply. A feeder 5 and a mixing and crushing machine 7 are provided.

The compost sieving unit D includes a sieving machine 8, a product hopper 9, and a screw conveyor 10, and a bucket elevator 11 of the unloading device H.
The return pipe 12 for sieving the compost carried in from the sieving machine, sending the compost that has fallen into the product hopper 9 to the compost carrying-out section B by the screw conveyor 10, and returning the moisture adjusting material that does not pass through the sieving machine 8 to the auxiliary material tank 3. Is attached. The doughnut-shaped part adjacent to the mixing and crushing part C and the compost sieving part D is an accessory device installation place 13 such as a blower for intake and exhaust, a power receiving and transforming device.

FIG. 3 shows the primary fermentation section E, which has six rectangular parallelepiped primary fermentation tanks 14 arranged in a donut-shaped portion at a uniform plane and arranged at regular intervals around the midpoint of the donut. To move the optional primary fermentor 14 to below the mixing and crushing machine 7,
The bottom of the mixing and crushing machine 7 is opened, and the raw material mixture in the mixing and crushing material 7 can be dropped into the fermentation tank 14 and fed.

The lower stage of the primary fermentation section E is the secondary fermentation section F, and each stage of the secondary fermentation section F is composed of four secondary fermentation tanks 15 each having a donut-shaped portion divided into four equal parts with a central angle of 90 °. . In the secondary fermentation tank 15, the primary fermentation tank 14 at the top is rotated to form a desired vertical relation position with respect to the secondary fermentation tank 15, and the primary fermentation tank 14 is provided.
The bottom of the container is opened, and the raw material mixture that has been fermented first is dropped and fed. The volume of the primary fermenter 14 is 22 m ² , and the volume of the secondary fermentor 15 is about 6 times the volume.

In the secondary fermentation section F, four secondary fermentation tanks 15 in which the donut-shaped portion is divided into 4 equal parts are configured in 7 stages, and the fermentation tanks of each stage open the bottom of the fermentation tank when a predetermined fermentation time elapses, and The raw material mixture falls into the lower fermentation tank and is fed.

The shipping adjusting section G is provided with an annular hopper 16 for receiving the fermented compost falling from the upper secondary fermentation tank 15, and an annular table feeder 17 located below the opening end of the fermentor. Table feeder 17
The compost sent out from is conveyed to the sieving machine 8 of the compost sieving part D.

The intake system device I is provided with an intake duct 18 and a blower 19 which are open at the upper part of the device, and is designed to supply air to each fermentation tank. The exhaust system device J is an exhaust duct 20 that opens at the upper end of the device, and a deodorizing device.
It has 21.

An example of the process of producing compost by the rapid fermentation method using this composting device will be described below. The raw material sludge 22 carried into the sludge tank 1 by a truck or the like, the moisture adjusting material 23 carried into the auxiliary material tank 3, and the seed germs are respectively used in the raw material blending machine 2, the moisture regulating blending machine 4, and the seed germ feeder 5. The raw material mixture 24 is sent to the mixing and crushing machine 7 at a predetermined ratio, and the mixed and crushed raw material mixture 24 is rotated under the mixing and crushing material to drop the mixture inside the primary fermentation tank 14 to be transferred to the primary fermentation. The primary fermentation is carried out for about 3 days, then dropped into the secondary fermentation tank 15 in the lower stage and transferred to the secondary fermentation process. The secondary fermentation 15 moves by dropping the formulation from the upper tank to the lower tank in sequence, and the 7th fermentation tanks 15 are sequentially from the top, 3 days, 6 days, 12 days, 12 days, 12 days, Fermentation is carried out on the 12th and 12th for composting. The obtained compost 25 is hopper 16
The compost 25 sent to the sieving machine 8 via the table feeder 17 and the bucket elevator 11 and passed through the sieving machine 8 is sent to the compost carrying-out section B by the screw conveyor 10 and carried out by a truck or the like and consumed as compost. The water content adjusting material 23 that does not pass through the sieving machine 8 is collected in the auxiliary material tank 3, mixed with the raw material mixture 24, and fed into the fermentation and composting process.

Oxygen required for fermentation in this composting process is supplied by air from the intake system I. Gas such as carbon dioxide gas generated by fermentation is deodorized by a deodorizing device 21 and then discharged from an exhaust duct 20. Moisture and other substances that accompany sludge are vaporized during the fermentation process, and are deodorized and released along with the exhaust.

[Work]

Since this composting device has the above-mentioned configuration and the main part is buried in the ground, it does not emit offensive odors or sewage, and emits deodorized clean exhaust compared to the ones constructed above ground. There is only. Compared to the above-ground equipment, the underground equipment is easier to adjust the temperature, humidity, oxygen gas concentration, etc., and can be easily fermented under suitable fermentation conditions to produce high-quality compost.

The device has a cylindrical shape, is equipped with a multi-stage fermenter, and can be built in a small site of about 1/10 compared to the conventional above-ground compost factory.
Since it is underground, it does not damage the scenery. The primary fermentation tank is provided in a rotating stage, and the position for receiving the falling material sludge formulation from above and the position for dropping the primary fermentation sludge into the secondary fermentation tank below can be adjusted by rotation. Raw sludge can be easily and evenly supplied to the multi-stage fermentation tanks.
The fermentation process can be controlled efficiently and the transportation energy can be saved.

By storing and arranging the intake / exhaust system and other auxiliary devices in the central part of the donut shape, the internal space can be effectively used, and the effect of absorbing and muffling the driving noise is great.

〔The invention's effect〕

The present invention is as described above, and the apparatus for composting organic waste is as described above, and has the following effects.

 It can be constructed on a small site and the land can be used effectively.

 No bad odor or discharge of sewage and no damage to the environment.

It can contribute to the improvement of exhausted farmland by producing high quality compost.

[Brief description of drawings]

The drawings show the composting apparatus of the embodiment. FIG. 1 is an overall vertical sectional view, and FIGS. 2 and 3 are YY sectional view and XX sectional view, respectively. A: Sludge loading section, B: Compost unloading section, C: Mixing and crushing section, D: Compost sieving section, E: Primary fermentation section, F: Secondary fermentation section, G: Shipping adjustment section , H ... Compost discharge device, I ...
... Intake system device, J ... Exhaust system device, 1 ... Sludge tank, 2 ...
… Raw material blending machine, 3… Sub-material tank, 4… Water content blending machine, 5… Inoculum feeding machine, 7… Mixing grinder, 8… Sieve machine, 9… Product hopper, 10… Screw Conveyor,
11 …… Bucket elevator, 12 …… Return pipe, 13 …… Attached device installation location, 14 …… Primary fermentation tank, 15 …… Secondary fermentation tank, 16 …… Hopper, 17 …… Table feeder, 18…
… Intake duct, 19 …… blower, 20 …… exhaust duct, 21
…… Deodorizing device, 22 …… Moisture adjusting material, 24 …… Raw material mixture,
25 …… compost.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akihiro Ueda 1-2-7 Moto-Akasaka Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Hiroshi Ibe 1-2-2 Moto-Akasaka, Minato-ku, Tokyo No. 7 in Kashima Construction Co., Ltd. (72) Inventor Eiichi Suzuki 1-2-7 Moto-Akasaka, Minato-ku, Tokyo No. 7 Kashima Construction Co., Ltd. (72) Inventor Masanobu Enami 1-2-Chome, Moto-Akasaka No. 7 within Kashima Construction Co., Ltd. (56) Reference JP-A-56-22696 (JP, A)

Claims (1)

[Claims] 1. An apparatus for fermenting and composting organic waste, which is buried in the ground, has a cylindrical shape, and is internally divided into donut-shaped multi-stages, and the raw material sludge is sequentially dropped and moved from the upper stage to the lower stage. It is equipped with primary and secondary fermentation tanks located in multiple stages, and the primary fermentation tank is provided in a stage that rotates around a doughnut-shaped midpoint. The position of dropping and feeding the primary fermentation sludge into the fermentation tank can be adjusted by turning, and an intake / exhaust system device and other incidental devices are arranged in the central part of the doughnut-shaped organic waste. Composting device.