It sounds like you DID find a considerable amount of information on Janina Ermant. Multiple records in the Holocaust Victims and Survivors database support your conclusions. Cross-referencing what you found with secondary sources on this site, you can fill in some of the details for her experiences during the Holocaust.
Janina Ermant was deported from the Lodz ghetto in August/September 1944 when it was liquidated and sent to Bergen-Belsen via Auschwitz and then to Flossenbürg/Mehltheuer on December 2, 1944, where she received prisoner number 59492. Her place of work at the camp is listed in Flossenburg records as "Vomag" which (based on the secondary sources) is likely a reference to Vogtlische Maschinenfabrik AG. And postwar documents from survivor aid organizations list her as being liberated from Rentzmuhler Camp.
According to the secondary sources included in this site - http://www.ushmm.org/online/lodzchildren/documentation/secondary_sources.pdf - "Almost 200 Polish Jewish women, most likely from Lodz, arrived in Mehltheuer (established in December 1944) via Auschwitz and Bergen-Belsen. They worked producing armored vehicles for the Vogtlische Maschinenfabrik AG."
BTW - You can find Janina's name near the bottom of this scan of the original World Jewish Congress list of survivors from the Rentzmuehler camp - http://digitalarchives.ushmm.org/HSV/cccat_media_files/1056_Page_1.jpg