10

Phoenix has two monster "wastewater" treatment plants that produce "highly treated effluent" as output. This water is used to water golf courses, etc. before it soaks into the ground water. Some of the treated water is piped out to the Palo Verde Nuclear Generating Station which uses it in the cooling towers. When I worked there, if the wind was in the ...


8

As all the other answers have said, nobody in the developed world dumps sewage in nearby rivers. What is discharged into the river is the treated water that comes out of the Sewage Plant. If your city is in a very arid area like Phoenix without a river your choices are: Discharge the treated water into the soil Use the treated water for irrigation Treat ...


6

Re-use and recharging. Arizona is rather proud of this, it seems. ☺ After filtration and treatment, the waste water is supplied for various re-use purposes. These can range from various categories of irrigation through snowmaking (sic!) to industrial coolants, and there is a system of categories of waste water and what each category may be used for....


5

Per the ever informative Snopes The hemisphere doesn't affect the spin of the water. This means that the water spin down the drain is controlled by the design of the drain. This shouldn't be hard to design for.


5

The blades are indeed made of, or tipped with a hard steel/carbide, but they also don't contact each other. The shredding action is created by the shear forces of the two corotating drums of "teeth", and this non-contact between the hard points, high shear strength, and gearing advantages allow it to power through whatever you throw at it. https://www....


5

Levers are your friends: a lever allows you to multiply up the force of your own strength. Here's a manual can crusher, demonstrating this: source Your hand moves three or four times the distance that the crushing part does; as a result, the crushing part moves with three or four times the force that your hand does.


4

Per the Wikipedia article on the Coriolis effect: Contrary to popular misconception, water rotation in home bathrooms under normal circumstances is not related to the Coriolis effect or to the rotation of the earth, and no consistent difference in rotation direction between toilet drainage in the Northern and Southern Hemispheres can be observed. Only if ...


3

Three options come to mind : septic tanks and sewage systems and reed bed treatment. Some properties far away from others ie in rural areas have septic tanks, which get emptied every so often by "sludge gulpers" - tankers designed to suck up and remove the contents. Being on mains drainage is much easier and the sewage ends up at Water Treatment Plants or ...


2

The main issue is the spread of pathogens, human faeces can harbour some nasty diseases, notably e-coli, hepatitis and cholera. Accumulation can also provide an environment where pathogens can survive for a long time and there is a significant risk of them leeching into water supplies. There is also a problem with any animal waste that if it accumulates ...


2

A bench press or arbor press, combined with a suitable die for horizontal containment, will allow you to produce rather high forces and pressures. Do you have any numbers — volume, pressure, etc. — regarding exactly what it is you're trying to achieve? EDIT: I have to confess that I missed the waste-disposal tag on my first reading, so my first ...


2

Option 4: Put it in the container, leave it on your doorstep and offer it for free on craigslist. You will likely find someone that regularly needs it and you can just email/text message them any time you set some out. People use waste vegetable oil to burn for heat, bio-diesel, soap making, animal feed, etc. Also note that disposing oil down the toilet is ...


1

Dumping your untreated poop directly into the river is actually a bad practice. A lot of municipalities (at least in my neck of the EU) have a main line running through it which collects the sewage from the buildings and brings it to a water treatment plant. If that is not an option then a septic system can be installed: A typical septic system works ...


1

many dyes and pigments can be decomposed by buffering the ink to either acid or base, depending on their molecular structure. you can then dewater the resulting effluent with the right RO membrane.


1

It all depends on what is in the waste water, and how much is allowed to be left after treatment. Treatment can mean anything from a settling tank, to a filter or screen, to oxygenating, to centrifuging, to active biological break down, and more. In some cases, treatment means it flows thru a "magic pipe" and is simply discharged when no inspectors are ...


1

I'm not clear from your question if you are trying to crush a plastic object, or manipulate hot plastic (eg for injection molding.) Lever systems are certainly a good option as has been mentioned in other posts, but depending on your application, a compact lever may not provide enough force for you.. If you need more force, hand-pumped hydraulic jacks will ...


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