This weekend
I think it's enough just to brush up my circle of friends
There's a gourmet show at home
Yes, go to the gym and practice your muscles
And a movie, too
It feels like everyone is living pretty well

Look at my weekend again
Stay at home and stay away from home
When I get up at noon and wash my face, I begin to order takeout
Fried chicken with coke
Watermelon crayfish
All eat Hesse Hu
Stay up and play mobile games
You talk about
I live my life like this
What's the difference between heaven and heaven?!

It feels really comfortable to eat in bed
Bart was in a state of excitement
I suddenly felt a ray of worry
Although the popular takeaway
But inevitably it brings a lot of garbage
The rubbish had been a favorite food on the table
But in the end, it was unavoidable to be escorted
Those shangougou empty dirty.
Come to such a miserable end

The garbage are not so willing to be a bad man
So dark poked out a revenge plan
The rubbish decided to produce a secret poison
↓
Landfill leachate
To retaliate against mankind
They are planning like this
First, various toxins are produced by oxidizing fermentation with their own components
The water is then used as a carrier to spread the toxins to
The water and the land in which man depends

There are usually 4 sources of water as a carrier
The rubbish itself contains water
Water generated by biochemical reactions
Reverse osmosis of underground diving
And atmospheric precipitation (mostly)
The rubbish was nothing to do with the manufacture of drugs
With the aid of various physical, chemical and biological factors
The release of your own toxins
And as time goes on
The toxicity of leachate increased continuously (water quality deteriorated)
It poses a great threat to groundwater

Practice time for leachate less than 5 years
Lower pH value
The concentrations of BOD5 and COD were higher
Biodegradability is good
(organic matter is easily eaten by microorganisms)
The concentration of various metal ions is also higher
Cultivation time of leachate over 5 years
That's even worse
High pH value
The concentrations of BOD5 and COD decreased
Poor biodegradability
(organic matter is not readily eaten by microorganisms
It can even inhibit microbial activity
Ammonia content is very high
The concentration of metal ions decreased
Characteristics of landfill leachate at different stages ↓

The rubbish is not for fear of human being
However, human beings are not easy to offend
Already aware of the garbage out of the heart
More stringent arrest warrants were issued in 2008
↓
Standard for pollution control of municipal solid waste landfill site
(GB, 16889-2008)

Attempting to use a series of technical means
Reforming landfill leachate
Make them up to the above standards
A re serve mankind
But landfill leachate is, after all, trained for many years
It's not very easy to deal with
Not only high concentration of ammonia nitrogen
Microbes also struggle to eat organic material
(poor biodegradability)

Before 2005
Human beings do not take much care of Landfill Leachate
Thought to send oxidation ditch and traditional aerobic technology
You can kill the leachate completely routed
It was later realized
There is a great change in water quality and quantity of Landfill Leachate
These techniques are simply impossible to cope with
In the end all failed

Can only wait for re transformation
After the defeat
Man began to analyze the enemy's character
Thus remedy the case
Gradually formed
Pretreatment + biochemical treatment + advanced treatment combined process
(current mainstream technology)

Pretreatment ↓
Solve ammonia nitrogen and inorganic matters
Improving the biodegradability of Landfill Leachate
Lay the foundation for biochemical treatment
Biochemical treatment, ↓
Removal of dissolved organic matter, ammonia nitrogen
Advanced processing ↓
Further removal of refractory organic compounds
Suspended matter, ammonia nitrogen and so on
Part of the new and expanded landfill leachate project ↓

This combination process
The enemy's ever-changing water quality and water quality are well defended
Eliminate toxins from landfill leachate at one stroke
The effluent can reach the standard
Moreover, the degree of automation is high and management is convenient
Since then, landfill leachate Makeover
Serve humanity again

Biochemical + depth process is slightly longer
The system is complex
Besides
A good process usually has a common problem
That's expensive

The investment cost is generally 7~12 yuan
The running cost is usually 22~35 yuan /m³
This process requires a high level of technical experience in operations management
At present, more specialized companies operate mode

This article source: environmental protection ring;

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