Immune-system components (e.g. complement) are bound to the antibodies and kept near, in reserve to disable them via phagocytosis by scavenger cells (e.g. macrophages).
Components of the immune system (such as complement proteins) are linked to antibodies and stored close at hand. These components can be engulfed by scavenger cells like macrophages via a process called phagocytosis, thereby neutralizing them.