  We study equilibrium fluctuations for a class of totally asymmetric
zero-range type interacting particle systems. As a main result, we show that
density fluctuation of our process converges to the stationary energy solution
of the stochastic Burgers equation. As a special case, microscopic system we
consider here is related to $q$-totally asymmetric simple exclusion processes
($q$-TASEPs) and our scaling limit corresponds to letting the quantum parameter
$q$ to be one.
