There's no need for complicated water treatment waste treatment systems, hiring waste disposal companies, killing off your septic tank, or losing sleep over related matters. Keep it simple and inexpensive. For aqueous chemistry, consider the option of collecting your spent solutions in one or more receptacles of sufficient size, durability, and type for your volume of work (e.g., polyethylene stock tanks). Place the receptacle(s) outdoors in a covered and secured location and manner that will not allow birds or other animals to get into it (e.g. a secured screen top). Let the water evaporate. Periodically collect the remaining solids and take them to the nearest household hazardous waste collection facility (HHWCF) in one or more labeled containers - there is typically no charge for this service. For spent non-aqueous wastes, collect these in suitable small, labeled containers, and take these to the same HHWCF. When dropping off anything at a HHWCF you will need to leave the container. Your containers for these purposes should be relatively small to facilitate handling by the HHWCF.
N. Riley
https://normanrileyphotography.com
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