no. I don't understand what you're basing your claim on. As far as i see it is easily possible. Even with anatomically normal gut some stuff can make from mouth to the other end in as short as 30 minutes. So the bandwidth is there (say it takes 1 hour to make through the 7m length of the gut pipe which say of 4 square centimeter section - that is 2.8 liter/hour speed) . The story of that guy says that he had severe diarrhea and overall really suggests that he had severe gut bacterial issues - that is one of the situations when stuff makes it very quickly through the gut.
He is described as of a small weight despite significant food intake - that again matches the situation of the food quickly passing through instead of thorough digestion. He is described as constantly scavenging and eating - say 15 hours a day 4 kg/hour (in the ballpark of the above mentioned 2.8l/hour) gives you 60kg. 4kg/hour quickly moving non-stop though the gut does sound like a severe diarrhea.
> His performances involved the consumption of metal, glass, rubber and other materials. He disassembled, cut up, and consumed bicycles, shopping carts, televisions, and a Cessna 150,among other items. The Cessna 150 took roughly two years to be "eaten", from 1978 to 1980. He began eating unusual material as a teenager, at around 16 years of age,[4] and performed publicly beginning in 1966.[citation needed] Lotito had an eating disorder known as pica. Doctors determined that Lotito also had a thick lining in his stomach and intestines which allowed his consumption of sharp metal without suffering injury
Indoor wonder if it's a coincidence both these guys were French....
Eating his body weight in a day? That's pretty outlandish and easily debunked.