Questions tagged [waste-disposal]

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5answers
4k views

What happens to sewage if there is no river near by?

I know that in places where there are convenient rivers and streams the tendency is to dump the communities sewage into those waterways so that it is carried away. But what about places where there ...
2
votes
0answers
34 views

Hazardous waste packaging

I'd like to ask an environemental question which has to do with waste packaging and the EU regulations that enclosure this subject I'd like to package loads of different hazardous wastes in ...
3
votes
2answers
37 views

Efficient processing waste water with pigments and dyes to reduce cost

Although ink waste (mixed colors of different inks for printing) is 90% water, separating the inks appears to be problematic. We have tried membranes, RO, electrolysis, boiling, and solidifying with ...
2
votes
2answers
107 views

Is it better to throw used domestic cooking oil in toilet or within the garbage? [closed]

I recently asked a friend how I should recycle my used deep frying oil because I just don't have enough oil to justify taking my car, drive 20 minutes away to the waste collection site for few liters ...
0
votes
1answer
67 views

Biological process in wastewater treatment

Biological process is the secondary stage in most of wastewater treatment plant. Is there any wastewater treatment plant without undergoing biological process?
0
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3answers
63 views

multiplying up human compression power! [closed]

I need help figuring out the most efficient way (NOT electronically) to manually compress plastic in a small confined space. I was thinking there were small compression shocks that would help to ...
-2
votes
1answer
36 views

Disposal of dung, related products, and cleaning products, prioritized and case by case [closed]

This question is a chemical engineering question related to ecology. What is the list of possible threats of human feces to the environment? What about toilet paper? How do engineers deal with this ...
0
votes
2answers
127 views

Is making a toilet flush backwards problematic? [closed]

The Coriolis effect impacts the way water tends to circle before going down the drain. Many (most, all?) toilets are designed to work with the Coriolis effect. I am considering a line of toilets ...
4
votes
1answer
81 views

Why don't massive industrial shredders shred themselves?

With the huge metal shredders that can shred an entire car or a bus, they can shred parts like the axle and engine which are large solid chunks of metal, just like the massive spinning shredder blades....