Anorexia Nervosa

i am treating a young lady who has been referred after 4 years of 'psychotherapy'.
she has severe OCD [runs 7 kilometers every morning- 300 sit-ups and 300 push-ups all before the day begins]
She is obsessive about her fiancée leaving 'crumbs' on the sofa and will spend hours cleaning not only the sofa but the whole room. There is a fear that any food in the environment will be somehow absorbed. Even though her S.I.E seems to have been 4 years ago , she was 'compelled' even as a child to spend a fixed amount of time each day doing homework.No parental problems but she was bullied in primary school.
I would appreciate some input. I am sure many of you have had experience in treating Anorexia that you are willing to share

regards,
Jules