How much does one gallon of garbage juice weigh?

Answer 1

Weight of any substance depends on its specific gravity. For instance a gallon of water will weight differently than a gallon of say, Mercury! Therefore you need to rephrase your question to include what waste are you talking about.

Answer 2

Since 'garbage juice' is mostly composed of water, 1 gallons of garbage juice should weigh in around 8.34 pounds per US gallon.