JPS61111987A - Manufacture of feed and fertilizer from chicken excrements - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Despite the fact that a large amount of money is invested in preventing pollution generated during the processing of chicken manure, the final sludge produced by the activated sludge method cannot be incinerated or dumped at sea. Currently, it is not being used as a resource at all. In other words, huge amounts of fuel costs, personnel costs, etc. are being consumed without being able to effectively utilize resources.

The present invention provides a manufacturing method that allows these to be used as resources for feed, fertilizer, etc. without causing foul odor pollution or wasting fuel.

The gist of the production method of the present invention is that chicken manure is directly processed into
Alternatively, a fluid (containing 80% to 90% water) of the final sludge of the activated sludge method, such as chicken manure, is stored in a cooker in which animal oil, fish oil, vegetable oil, etc. has been previously charged as a heat medium, and stirred. This is a method for producing feed and fertilizer by heating indirectly, dehydrating under reduced pressure conditions, and then separating oil and solids using a centrifuge, compressor, continuous compressor, etc.

Next, an example of the manufacturing method of the present invention will be described.
Approximately 6.0 OOkq of chicken manure was put into a tanker containing around 750kc+ of fish oil, stirred and heated, and the pressure was reduced.
Dehydration is performed, and after about 3 hours it is made into a solid with a residual moisture content of about 6%. Take this out of the cutter and the unit pressure is 5,000 ~
Separated from oil by continuous squeezing at 8,000 pounds of pressure.
The feed or fertilizer is made into a flat solid material with an oil content of 8 to 10% and a moisture content of around 5%.

However, if chicken manure is directly dehydrated using a rotary kiln method, which is currently the most advanced method of vacuum indirect heating membrane hydrolysis, the heat transfer efficiency is about 20 to 30%. Therefore, assuming the moisture content of chicken manure is 90%, it is 6,000 kg.
The water that was dehydrated from chicken manure remained in the solid matter after dehydration6.
Water except % is evaporated. That is, 6,0OOkQ-(
If the thermal efficiency is 25% to dehydrate 600 +; ++ 36 kq) = 5.364 kg, the fuel cost will be 1.0OO
Bl oil (9,000caQ) to evaporate kq of water
, ) requires around 264Q. Therefore 5.364k
The fuel required to dehydrate q of water is 14.1519
It is. In contrast to such fuel consumption, the effective components of the solid after dehydration are small, and as it is not economically profitable, the current situation has no choice but to directly incinerate the solid.

The method of the present invention uses oil as a heat medium to interact with these fluids.
'S7. Since dehydration is carried out under reduced pressure, the heat transfer efficiency is 85%, compared to 25% in conventional dehydration methods. Therefore, the fuel consumption required for the above-mentioned dehydration method is approximately 1/3.5, which is equivalent to or less than the fuel consumption for direct incineration. After using 750 kg of fish oil, if we continue to use it as fuel for indirect heating, we can make economical calculations that allow us to effectively use the active ingredients that were traditionally incinerated as feed and fertilizer. Since the water is dehydrated, bad odor pollution during the treatment process will be eliminated.

Products produced by the production method of the present invention, that is, products made from chicken manure, contain many drugs and health foods, and therefore their digestibility is assumed to be 50% or less. As described above, according to the production method of the present invention, feed, fertilizer, etc. can be produced from discarded or incinerated raw materials without worrying about bad odor pollution, etc., so it is an extremely useful invention.

Claims (1)

[Claims] 1) Chicken manure is placed in a cooker containing animal oil, vegetable oil, fish oil, etc. as a heat medium, stirred, and dehydrated by indirect heating under reduced pressure. A method for producing feed and fertilizer by separating oil and solids.