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Questions tagged [waste-disposal]

11 questions
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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 is no river nearby? So, for example in Phoenix, or…
Wallace Park
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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. So why does the car get shredded and not the…
jhabbott
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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 kitty litter. Membranes do not trap the dyes,…
Kirt Haden
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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 compliance with ADR. So, depending on the waste, I use the…
Johnnas
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Is it better to throw used domestic cooking oil in toilet or within the garbage?

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 of oil. So my friend advised me to just throw it…
nowox
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Why can't we dispose of plastic waste in decommissioned oil wells?

As a non-expert, abandoned oil wells appear to me to be perfect solution for ever growing amount of plastic waste we are generating every year. These underground pockets held crude oil for millions of years without allowing it to seep into the…
Dean Kuga
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Question about nuclear wastewater treatment and disposal

This might be a stupid question, I'm not an engineer, and not really sure where to begin to research this. I tried Google but of course it's all biased toward news articles about Japan. So let's start with what I know. Nuclear wastewater has tritium…
Speeddymon
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Is making a toilet flush backwards problematic?

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 that would flush opposite of this, this is strictly…
James Jenkins
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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?
Wendy lly
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multiplying up human compression power!

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 triple my human body force but have been unsuccessful…
jaehowell
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Disposal of dung, related products, and cleaning products, prioritized and case by case

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 problem? I mean, sure, there are sewers, but sewers…
Jack Maddington
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