  We construct a non-chiral conformal field theory (CFT) on the torus that
accommodates a second quantization of the elliptic Calogero-Sutherland (eCS)
model. We show that the CFT operator that provides this second quantization
defines, at the same time, a quantum version of a soliton equation called the
non-chiral intermediate long-wave (ncILW) equation. We also show that this CFT
operator is a second quantization of a generalized eCS model which can describe
arbitrary numbers of four different kinds of particles; we propose that these
particles can be identified with solitons of the quantum ncILW equation.
