The council said the offenders were seen dumping the waste on footage recorded by nearby residents and CCTV cameras, despite “clear signage and regular collections” at the site.
This prompted the fines “as part of our commitment to tackling environmental crime”, it added.
Failure to pay fines can result in a further fine or imprisonment of up to five years, according to the council.
Ellen Nicholson, the council’s portfolio holder for climate change, said in April that people who misuse the site “create an eyesore, put additional pressure on council resources and risk the closure of facilities intended to benefit the community”.