Benkahla is in an isolation unit even though he has been classified as a minimum security prisoner.
Israeli released 26 security prisoners at the beginning of Ramadan, half of whom had a few months left to serve.
It was reopened as a prison farm in 2010 and has a capacity of 84 minimum security prisoners.
The prison, built to hold up to 800 maximum security prisoners on the site of the former chemical works, opened in December 2008.
"We demand equal treatment for Jewish and Arab security prisoners."
Most high security female prisoners reside in special restricted zones within general women's prisons.
This is not the case with "security prisoners," or convicted Arab guerrillas.
Sheep and cattle are raised at the prison providing work for low security prisoners involved in running an agricultural business.
The facility has minimum security prisoner public works and gate pass assignments.
No more than two maximum security prisoners were allowed outside at once, and then they were put in distant cages so even conversation was difficult.