JPS58112092A - Treatment of excretion - Google Patents

Abstract

PURPOSE:To avoid the complication of an apparatus and the plugging of a piping system, while lowering a running cost, by biologically treating excretion with active sludge, separating a solid part from it and then evaporating water therefrom in an evaporating column. CONSTITUTION:Crude excretion is charged in an aerating cell 1 and cyclically fluidized under a condition contg. active sludge. The treated excretion is partially supplied to a precipitating cell 5 to separate active sludge by precipitation and then to a flocculating-mixing cell 8 to perform coagulation. After a solid part is separated in a flocculating-precipitating cell 9, the treated night soil is supplied to a reservoir 13. In succession, the treated excretion from the reservoir 13 is supplied from the upper part of a filter 15 through a nozzle 16 to a shower in an evaporating column 14, while air is sucked in and supplied from the lower part of the filter 15 by a sucking fan 17. The treated excretion is evaporated by gas-liquid contact in the column 14, and the residual excretion is reserved in a water intake cell 18.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for biologically treating human waste using activated sludge.

In the above treatment, the treated water is generally disposed of by being discharged into rivers, etc., but with the increasing momentum of anti-pollution movements in recent years, even if the water is treated to be harmless before being discharged, the discharge itself is This has caused opposition from local residents, making it extremely difficult to install treatment facilities. Therefore, it has been proposed to directly incinerate or evaporate human waste after biological treatment so that it can be treated without being discharged.

However, since processed human urine contains a large amount of solids,
In order to avoid the negative effects of solid content, incineration equipment or evaporation equipment must become mechanically complex, and the pipes for transporting human waste to these equipment must be free from troubles caused by clogging of solid content. Raw manure has the disadvantages of low operating rates such as frequent interruptions in processing, and extremely high running costs when processing a unit volume of human waste.

In view of the above points, the uninvented invention is to evaporate human waste, but to avoid complication of equipment and clogging of piping systems due to solid content, and to significantly reduce running costs. The purpose is to

Next, examples of the method of the present invention will be described.

Inserting the raw IL into the aeration tank (1), and circulating the activated sludge-containing human waste from the discharge path to the supply path (3) via the circulation pump (4),
Dissolved oxygen production in the aeration tank (1) is adjusted by controlling the supply amount of oxygen-containing gas such as air in the semi, and ammonia nitrogen is nitrified and reduced to be removed as nitrogen gas. Treatment to reduce physical oxygen demand and chemical oxygen demand. In addition, the aeration tank +11 is approximately 10 m, etc.
It doesn't matter whether it's a relatively shallow expedition or an expedition that ranges from JAN to IOθ Tsuru or even more VC.

A part of the human waste treated by the circulation flow is taken out and supplied to the settling tank i11, the activated sludge is sedimented and separated, and a part of the separated sludge is returned to the return path (6), while the surplus is concentrated and stored. Supply to tank (7).

The treated human waste from which the sludge has been separated is supplied to the coagulation mixing tank (8) and subjected to the coagulation IIk treatment to increase the diameter of minute solid flocs, and then the solids are separated in the coagulation sedimentation tank (9),
The separated solid content is supplied to the pre-molten water condensation storage tank (11), and the solid content from the settling tank 161 is supplied to the dehydration *tm for dehydration treatment, and the Ii! form after the dehydration treatment is incinerated. It is deodorized and incinerated in a furnace (11).

From the IIJ flocculation and sedimentation tank (9), the treated human waste from which the solid content has been separated is supplied to the passer σ to remove even minute solids, and then the furnace liquid is supplied to the treated water storage tank for storage. I'll let you.

Incidentally, the dehydrated solution from the dehydration unit 1 may be supplied to the trougher α force.

The above process completes the biological treatment of human waste using activated sludge and the separation of solids from the human waste after biological treatment.

The treated human waste from the treated water storage tank GSGS etc. is transferred to the evaporation tower 041.
A suction fan +171 installed at the top of the evaporation tower a- is supplied with a shower from above the furnace material gQ inside through the nozzle end...
9 air is sucked and supplied from below the door material 114, the urine is evaporated through gas-liquid contact at 70, and the remaining human waste that has not been evaporated is stored in the water receiving tank A barrel.

The water receiving tank +III and the nozzle 0 peak... are connected in communication via the return flow path α-, and when the measured production in the water receiving tank - exceeds the set value, the nozzle 1 from the treated water storage tank I is connected. @-
・The first pulp (b) interposed in the supply path to is closed and the first pump (2) is stopped, while the
At the same time as opening the second pulp (2) interposed in the pulp, the second pump is driven, and the hot pulp liquid heated by the exhaust gas of the municipal waste incinerator is supplied to the door material through the heat exchanger. , r
The precipitates adhering to the vf- are eluted and washed away together with the biological slime, and evaporation is repeated through circulation therein.

#aε Remaining human waste from the water tank (11) is supplied to the first dehydrator and concentrated, resulting in gypsum (CaSO4)
Dehydrated salts such as salts are precipitated and removed, and biological slime is also removed.

The residual human waste removed by the Isl dehydrator! The incinerator exhaust gas is used as a heat source in the incinerator cla, and the steam from the fourth boiler is blown into the evaporator for evaporation.

Furthermore, fill it with residual human urine from the evaporator can! It is supplied to a dehydrator for concentration treatment, and along with this, sodium chloride (HaCl) is
, ) and magnesium chloride (MyCls) are precipitated and removed, and the remaining human waste that has been desorbed from the @1 dehydrator is returned to the water receiving tank, where the entire amount of human waste is evaporated.

Utilizing air from the butterfly heat exchanger, the evaporator, and the boiler steam through the evaporator (c),
The residual human waste supplied to the evaporator (c) is preheated so that evaporation can be carried out with advantageous heat efficiency.

FIG. 8 shows another embodiment, in which a part of the front reduction flow path is shown.
Circulation*aW 11 wheels are heated with prefectural heating plates, immersed in a hot water storage tank using solar heat, and heated by steam from a steam generation boiler via a heat exchanger to create a general purification system. Furnace fluid t
I make sure to preheat it properly. Further, the steam from the boiler 1 is supplied to the evaporator e24, and the steam 1A9L is used to preheat the remaining water supplied to the evaporator canister through the heat exchanger c111, and then blown into the hot water storage 111B4. In addition, the exhaust gas from the evaporator (c) is also blown into the hot water storage tank to make full use of the exhaust heat and further improve thermal economy.

The heat source for preheating the cleaning liquid from the water tank to the evaporator tower and for the evaporator UK is not limited to the high-temperature exhaust gas from the municipal waste incinerator as mentioned above or solar heat, but also various sources such as geothermal water, etc. You can use the following.

The sedimentation tank (11K may be replaced with a centrifugal separator,
Further, a flotation separation tank may be used in place of the coagulation and sedimentation tank 111+.

To show an example of a treatment experiment in the evaporator Q4, an amount of urine 6s times the amount of treated human waste per day is circulated and evaporated through the reduction flow path O, and the amount of urine is reduced by about 10 times. Next, we will show the results of a Kui experiment conducted based on the above process.

In the above embodiment, the evaporation process is carried out by gas-liquid contact in the evaporator (14), but the evaporation process may be performed by high-temperature heating as a threat to the evaporator.

In addition, in the above embodiment, the evaporation treatment of human waste from which the solid content has been separated is divided into two stages: evaporation by gas-liquid contact treatment and evaporation by heating, and a K111 condensation step is added to each stage, and dehydration and salting are performed. Although the present invention is intended to precipitate and remove crystalline salts and prevent solid content from being precipitated during the concentration process by evaporation, the present invention may not include the addition of the attenuation step.

In summary, the method for treating human waste according to the present invention involves biologically treating input human waste using activated sludge, separating the solid content from the biologically treated human waste, and then evaporating water in an evaporator I. Features.

In other words, since the evaporation process is performed after the solid content is separated, there is no need to take measures against the solid content in the evaporator (I4&C), it is mechanically simple, and it is possible to prevent clogging of solid content in the piping system. This allows continuous operation for long periods of time without interrupting the process, significantly reducing cleaning costs.

[Brief explanation of the drawing]

The drawings illustrate the basic concept of the human waste treatment method according to the present invention, FIG. 1 shows a 70-sheet, and FIG. 3 shows another embodiment]a-
It is a sheet. I...Evaporator.

Claims (1)

[Claims] ■ The system is characterized by biologically treating input human waste using activated sludge, separating the solid content from the biologically treated human waste, and then evaporating water in an evaporation tower A4. Human waste disposal method. (2) The method according to item 0 of the scope of the patent application, characterized in that after the evaporation treatment is performed by gas-liquid contact in the evaporation tower 04, the remaining human waste is concentrated and the solid content is precipitated and removed. ■Claim No. 0 characterized in that residual human waste is subjected to heat evaporation treatment and concentration treatment to precipitate and remove solid content.
The method described in section.