The former Belgium Under-21 forward linked up with the Shakers on Monday before taking part in a development squad match against Bolton that evening.
Following Tuesday's defeat against Sheffield United, manager Kevin Blackwell confirmed that the 27-year-old was already on his way home.
"Yulu was a free agent; he was out of contract and had shown a little bit in training," he told the club's official website.
"I signed him on non-contract terms with a view to looking at him in the reserves against Bolton, if he had shown something in that game, I might have been able to throw him on the bench, so he's on the next flight to Brussels."
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