No that's only on designated container days.
Container Days: South Orange residents are welcome to drop off household bulk items at the Public Works facility. Proof of residency is required and no commercial vehicles (U-Haul's/ Home Depot rental vans) are permitted on the property. Electronics, construction material, and hazardous waste will not be accepted at these events.
April 27 / May 18 / June 22 / July 27 / Aug. 24 / Sept. 21
More information available here:
On Saturdays, does the South Orange dump take things like soft kids' furniture and old beanbag chairs (no frames), wood pieces, plastic toys?