China Railway and Black Technology, helping the "toilet revolution" on the track!

High -speed rail has become now

The preferred transportation method of Chinese people's daily travel

When taking a train

It is inevitable to go to the toilet

When going to the toilet

It is inevitable that there will be some questions

The toilet on the train is

How to deal with excrement?

Where did these excrement go in the end?

Today, I will take you to learn about it

"Toilet Revolution" of the railway system

Disclose a secret

The ultimate destination of excretion

1.0

Era of direct discharge

Have you ever seen the bottom landscape of the train?

Have you ever experienced the experience of "accompanied by monks to chrysanthemum wind"?

Have you heard of a professional term "direct discharge"?

If there is

Believe you should be

Middle -aged and elderly toilet friends who are similar to Xiaobian

It must be deeply touched by it

What is the train line toilet?

Right, you don't think wrong

Of course it is the direct emission of 直接

The pipeline below the stool pool leads directly to the track

The size of the toilet is excreted directly

Both sides of the track passed by the train

So why can't we see the excrement?

Because during the high -speed driving process of the train

Under the pressure generated by the airflow

Whether it is a stool or sanitary paper

All will be dispersed and dispelled on the roadbed on both sides of the railway

It is even broken into extremely subtle gas mist particles

Say in the air, integrate with nature

Eventually rely on environmental self -purification ability to purify

This kind of original processing excrement method

Pollute the environment and don't say

It may also cause disease transmission

Give railway maintenance personnel and nearby residents

Causes health effects

But when the train is about to enter the station

Or when entering the environmental sensitive area

Including through the super bridge, key tunnel, etc.

In order to prevent the excrement pollution environment

Will lock the toilet

When you are "three urgent" rush

But I found that the train entered the station

That kind of despair

Sitting up so far

When you avoid the car

But I found that there were foreign things rushing to come

That kind of despair

There is nowhere to hide

2.0

"Collection" era

After a vacuum collection toilet appears in the railway bus

The excrement no longer excretes to the sides of the orbit

Instead

Picking into the dirt box in the lower part of the car body

After the specified sewage station

Eliminate the septic tank through pipes and pumps

Some conveying systems are also equipped with broken equipment

Specialized to deal with rough debris in dung pollution

Then, the problem is here again

What are the feces in the septic tank?

3.0

Breakthrough of stool treatment technology

The septic tank is fermented by precipitation, hydrolysis and anaerobic fermentation

Remove pollutants

At the same time, it has a certain slag

Poisonous dirt forming solid residue and wastewater of stool wastewater

The solid residue can be removed to the specified emission point by regularly clearing the external transportation point

But at this time, the stool wastewater cannot be discharged directly

Because the proportion of urine in the railway sewage wastewater is high

Pool wastewater belongs to high organic matter, high ammonia nitrogen, low -carbon nitrogen ratio wastewater

It will have toxicity and inhibitory effect on microorganisms

Compared with ordinary domestic sewage treatment, it is difficult

Direct emissions will destroy the ecological environment around the railway

At this time, the sewage wastewater will enter the next stop

The rejection of the traditional biological nitrogen dehydration process

Affected by carbon source is greater

General carbon nitrogen ratio is less than 3 o'clock

Reverse nitrification is basically stopped

A significant decrease in nitrogen dehydration efficiency

Therefore, the treatment of low -carbon nitrogen ratio wastewater

Insufficient carbon source or too much treatment cost

Be the biggest constraint bottleneck

It is difficult to deal with

2020

China Railway Industry, a subsidiary of China Railway Environment Company

Institute with the Kunming Railway Bureau

Treatment of railway passengers to deal with wastewater treatment problems

Carry out the test test

use

CRHIC-Intdn's new biological nitrogen dehydration system processing process

Treatment stain wastewater

CRHIC-Intdn's new biological nitrogen dehydration system processing process

Its superiority lies in two key links

First, the CRHIC-PN reactor short-range nitrification+denitrification: through a short-range nitrifying process, stabilize some ammonia nitrogen to nitrogen nitrogen, and use the desertification process to remove the degradable organic matter and return nitrite in the water to reduce The concentration of organic matter, ammonia nitrogen and total nitrogen.

Second, the CRHIC-AMX reactor anaerobic oxidation: Under the action of anaerobic ammonia oxidation (commonly known as "red bacteria"), nitrite and ammonia nitrogen are converted into nitrogen and water, and the total nitrogen in sewage is efficiently removed without requiring Increase the carbon source.

The two tubes are unified, the effect is strange

Successfully solved the problem of low -carbon nitrogen ratio wastewater treatment

At present, related technologies have applied for a invention patent

Water after nitride treatment

Looks deep in color

Greatly lower the face value

Restricted resource utilization

What should I do?

At this time, it's time to enter the last stop

In -depth treatment unit

Use micr -nano ozone technology

That is

The ozone is evenly scattered in the wastewater in the form of micro -nano gas bubbles

Make ozone and wastewater fully in contact

Use the strong oxidation of ozone

Remove the non -ferrous substance in the wastewater

Kill the pathogen bacteria in the wastewater

So as to restore the value and safety of water

This technology has been successfully applied to the Kunming South Motor Office

This project is a very few domestic in China

Large -scale high -speed rail station collector wastewater treatment

Successful cases of picking beams with biochemical treatment

In terms of processing efficiency, occupying the area

Operation costs, management and maintenance

Low -carbon benefits have significant advantages

So far,

Railway pollution and harmless treatment

Opened the last "one kilometer"

All treated wastewater

Can be directly discharged or resource utilization

This technology can not only solve the stool and waste water

For sludge digestive solution and garbage osmotic fluid, etc.

Low -carbon nitrogen than wastewater treatment has a wonderful effect

Make water environmental protection

Outstanding Contribution

Editor -in -chief 丨 Li Yuan, Shen Su

Editor -in -chief 丨 Xiao Yan (Industry)

Content source 丨 China Railway Industry

China China Railway Finance Media Center

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