Is it worth to recycle used chemistry?
95% of a mixed chemistry is water. 95% of the contents are carbonate, and thiosulphate. These compound worth only $2.00 per kilogram. The labour and energy involved to recover them is close to the value it can recover. Is photo chemistry is very toxic? No. Photo chemistry is a low hazardous product. It can cause allergy to certain people. It is also corrosive in certain degree. You should not be too afraid of them. Is photo chemistry using material that can be used to make noodles, soft drinks, vinegar, and fertilizer, face cream, etc.? Yes. 95% contents of photo chemistry are non toxic. They could be found in super market.