There are two places that I go regularly. One is in Spreitenbach.
http://www.entsorgungs-park.ch/fs/start.htm
The other one is in Wettingen, near to Tägi.
http://www.wettingen.ch/de/dienstema...object_id=2592 http://www.wettingen.ch/de/dienstema...&object_id=468
I usually disassemble my furniture before loading them. In Spreitenbach, you drive over the scale, unload your unwanted items, drive back on the scale and pay. In Wettingen, the men that work there give you the estimate.