CN1052462C

CN1052462C - Method of treatment of sewage sludge and kitchen garbage

Info

Publication number: CN1052462C
Application number: CN93119846A
Authority: CN
Inventors: 中园修三
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-09-25
Filing date: 1993-09-25
Publication date: 2000-05-17
Anticipated expiration: 2013-09-25
Also published as: CN1100703A

Abstract

The present invention relates to a treatment method for sludge and kitchen garbage. The present invention provides a treatment method for sludge and kitchen garbage. The present invention is characterized in that sludge or kitchen garbage is used as raw materials; the raw materials are soaked in animal oil, fish oil, vegetable oil, etc., which are heated in a cooker, and oil which is simultaneously decompressed and heated in three stages in a closed container is used as a heat carrier for stirring and heating; moreover, in the initial stage of a decompressing process, treatment is carried out under the decompressing condition that the pressure is 100 mmHg to 300 mmHg lower than the normal pressure; in the middle stage of the decompressing process, treatment is carried out under the decompressing condition that the pressure is 500 mmHg to 700 mmHg lower than the normal pressure; in the final stage of the decompressing process, treatment is carried out under the decompressing condition that the pressure is 700 mmHg to 750 mmHg lower than the normal pressure; consequently, water contained in the raw materials is separated and evaporated, and the dewatered raw materials are divided into oil and solid by a squeezer so that protein materials are obtained.

Description

The treatment process of mud and food waste

The present invention relates to the treatment process of mud and food waste.

Past, the known method that has utilization oil temperature to handle mud and kitchen waste.

This method is to put into earlier animal oil or vegetables oil in cooker, with the oil heating, puts into the waste raw material in oil, evaporates moisture from the raw material separation under oily temperature, and the solid substance of press dewatering and de-oiling then becomes the albumen material.

For example,, disclose when oil is heated in cooker, carried out processed, carried out de-oiling then and handle by the two-stage decompression that little preliminary vacuum in this cooker and big later stage reduce pressure opening in flat 1-240148 number of the applicant the first to file spy.

Yet, in aforesaid method,, be necessary the oil in the cooker is heated to quite high temperature in order in cooker, to dewater fully.In the disclosed technology, also oil is heated to about 120 ℃ in Te Kaiping 1-240148 number.

Therefore, just have raw material surface heat embrittlement, the contained moisture of donor center is difficult to separate the problem of evaporating away.If donor center moisture entrapment amount is many, later press operation just can not fully be carried out.

This is the living retroaction because the moisture of donor center can externally be cut down output, thereby can not fully squeeze the oil that contains in the raw material.

The raw material that resid amount is many can cause the oxidative phenomena of oil, thereby the albumen quality of material as end article is descended.The object of the present invention is to provide to solving the method for above-mentioned problem.

In order to solve above-mentioned technical task, the invention provides a kind of method of handling mud and food waste, this method is for being raw material with mud or food waste, this raw material is put in the animal oil that heats in the cooker, fish oil, vegetables oil, flood in the single oil of chicken fat or the mixing oil, the oil that heats while reducing pressure with branch three phases in the encloses container is the thermal barrier stirring heating, separate contained moisture in the raw material that evapotranspires, it is characterized in that in the early stage in the decompression process, under reduced pressure than the low 100mmHg～300mmHg of normal pressure, by being heated to 63-66 ℃, oily temperature carries out processed, then, in the mid-term decompression process, under reduced pressure than the low 500mmHg～650mmHg of normal pressure, under 54～56 ℃ of oily temperature, carry out reduced pressure treatment, at last in the later stage decompression process, under reduced pressure than the low 700mmHg～750mmHg of normal pressure, under the oily temperature about 62 ℃, carry out reduced pressure treatment, after separation evaporates moisture contained in the raw material, dehydrated raw material is separated oil content in squeezing machine with solid substance, obtain the albumen material.

In the present invention, because heating is collected in oil in the cooker, dipping raw material and reducing pressure in this oil particularly changes reduced pressure in three stages, increase lentamente and keep reduced pressure, therefore received the effect that under low oily temperature, fully to dewater raw material.And owing to can deviate from the moisture of central part, the operation of extracting oil easily can obtain high-quality albumen material really as end article.

Fig. 1 represents the decompression process of three stage decompressions in the embodiment of the invention 1.

Fig. 2 represents the decompression process of three stage decompressions among the embodiment 2.

Fig. 3 represents the decompression process of three stage decompressions among the embodiment 3.

Embodiment 1

In the present embodiment, at sealable volume 6.5m ³Cooker in, put into single oil or mixing oils such as 800kg left and right sides animal oil, vegetables oil, fish oil, chicken fat, be pressed into steam with heated oil to the chuck of cooker, oily temperature is heated to about about 70 ℃～80 ℃.

This temperature is that nutrient composition in raw materials such as mud or food waste are not dissolved in the heat freezing temperature in the oil.

Then, put into mud in the heated oil in above-mentioned cooker or contain the food waste raw material 800Kg such as (fresh rubbish) of moisture, cover cooker after, keep cooker internal heating oil oil temperature about 60 ℃ up and down in cooker continuously stirring, and make decompression in the cooker.Food waste refers to the cooking residue in family, restaurant etc., contains the food waste such as fish pomace, meat bits of gelatin material, protein etc.

Figure this reduced pressure treatment, as shown in Figure 1, in the preliminary vacuum process after the raw material input about 5～10 minutes, under the reduced pressure of the low 250mmHg than normal pressure, make moisture evaporation in the raw material of the oil heating about 63 ℃～66 ℃ with dehydration.

Then in the mid-term decompression process, under condition of negative pressure, carry out reduced pressure treatment with the oily temperature about 54 ℃～56 ℃, and kept this state about 20 minutes than the low 650mmHg of normal pressure.Under this reduced pressure, owing to be in state, thereby can evaporate moisture contained in the raw material and dewater near the boiling point of water.

Then, in last later stage decompression process, under the reduced pressure about low 750mmHg, under the oil temperature about 62 ℃, carry out reduced pressure treatment than normal pressure.In this stage, continue by the processed that mid-term, decompression process began, final dewatering is 4～6% state to the water content of raw material.Reaction times is different because of the kind and the different amts of raw material, is approximately 1～1.5 hour.The relation of decompression amount and decompression time is shown in Fig. 1 curve in the above-mentioned three stage decompression processes.

Because above 3 stages of branch are carried out reduced pressure treatment, at first in the early stage in the decompression process, make useful nutritive ingredients such as water soluble protein in the raw materials such as mud, food waste, gelatin material stably be set in the raw tissue, prevent that this one-tenth from distributing, decomposing, in the mid-term decompression process, moisture in the tissue is promptly carried out processed, and in the later stage decompression process, finish whole processed.

And, contain salinity that from raw materials such as mud, food waste, migrates out and vegetables oil, fish oil or the animal oil that has heated, with moisture contained in the above-mentioned raw materials, and together by the moisture in the metathetical raw tissue, because the osmotic pressure effect of salinity, moisture in the tissue is penetrated into the extracellular of tissue fully, and processed can promptly be finished.

Also have, in aforementioned decompression process, owing to can under the low temperature about 50 ℃～60 ℃, dewater fully, can avoid the useful loss of nutritive components such as VITAMIN that cause owing to pyrolytic decomposition, make it to remain in the raw tissue.

Moreover, raw material after the aforementioned decompression heat treated, from cooker, take out, it is for example carried out physical squeezing in the expeller at pressing device, and in whizzer, separate, separate and remove contained salinity in the raw material, pungency component, contain the dirty oil content that becomes to grade, in case of necessity with de-oiling agent de-oilings such as normal hexane to oleaginousness be below 2% after, pack in the middle hopper, raw material after handling is added screen(ing) machine, isolate handled thing and some ethenoid resin the like waste on the screen(ing) machine, broken with carrying out fine powder in this handled thing input pulverizer.

After this, handle the handled thing of fine powder after broken, and the ethenoid resin the like waste is separated from handled thing with screen(ing) machine.Thereby the handled thing that obtains with aforesaid method contains effective constituents such as more protein, can be used as fertilizer, feed etc.

Embodiment 2

In the present embodiment, compare with embodiment 1, raw material and install identical, but reduced pressure difference.Reduce pressure in three stages, even decompression at low temperatures also can be dewatered fully.

Specifically, as shown in Figure 2, in the decompression process, reduce pressure on a small quantity in the early stage, in reaction beginning back 5-10 divides, the pressure ratio normal pressure is reduced about 200mmHg.

Then, in the mid-term decompression process, carry out step-down significantly, the pressure ratio normal pressure is reduced about 600mmHg, under the oily temperature about 55 ℃～60 ℃, keep the decompression state of about 20 minutes the same terms.

In above decompression process, when moisture is dewatered, the oil temperature that raises, and make pressure near vacuum state.

And, at the later stage decompression phase, pressure is reduced to than about the low 750mmHg of normal pressure, under 62 ℃ of oily temperature, handled 1-1.5 hour.After the reduced pressure treatment, carried out the operations such as oil expression processing identical with embodiment 1.

Owing to carry out above triphasic decompression, the water content of raw material can be taken off to the 4-6%, and can under oily temperature is low temperature about 50～60 ℃, carry out.

Embodiment 3

In the present embodiment, shown in 3, carry out a small amount of step-down in the preliminary vacuum process, promptly in 5～10 minutes, reduce about 300mmHg than normal pressure down in the oil temperature about 65～69 ℃ in reaction beginning back.

Then, carry out the intensity step-down in the decompression process, promptly be depressured to and be lower than normal pressure 500mmHg, under 65 ℃～69 ℃ oily temperature, keep the decompression state of about 20 minutes the same terms in mid-term.In above decompression process, moisture is dewatered, and in the oil temperature that raises, make pressure near vacuum state.

Then,, be depressurized to and be lower than normal pressure 700mmHg, under 60 ℃ of oily temperature, handled 1～1.5 hour on the right side as the later stage decompression phase.After the reduced pressure treatment, carry out the operations such as oil expression processing identical with embodiment 2.

Carry out above triphasic decompression, the water content of raw material can be taken off to 4～6%, also can under the low temperature of 50～60 ℃ of oil temperature, carry out.

Like this, owing to can dewater completely, thereby the useful loss of nutritive components such as VITAMIN that cause owing to pyrolytic decomposition can not appear under cold condition.Thereby can hold it in the albumen material.And, owing to be low-temperature heat, can react with simple heating device more.

Claims

1. the treatment process of mud and food waste, this method comprises that with mud or food waste be raw material, with the animal oil of this raw material at the cooker internal heating, fish oil, vegetables oil, flood in the single oil of chicken fat or the mixing oil, the oil that heats while reducing pressure with branch three phases in the sealed vessel is the thermal barrier stirring heating, separate and evaporate away moisture contained in the raw material, it is characterized in that: in the early stage in the decompression process, under reduced pressure than the low 100mmHg～300mmHg of normal pressure, carry out processed by oil being heated to 63～66 ℃

Then, in the mid-term decompression process, under reduced pressure, carry out reduced pressure treatment under 54～56 ℃ the oil temperature than the low 500mmHg～650mmHg of normal pressure,

At last, in the later stage decompression process, under reduced pressure, under 60-62 ℃ oily temperature, carry out reduced pressure treatment than the low 700mmHg～750mmHg of normal pressure,

After separating moisture contained in the evaporation raw material, make the raw material of this dehydration be separated into oil content and solid substance, obtain the albumen material with squeezing machine.