A food disposal system for installation on a drain of a commercial kitchen sink enables segregation of oilgrease from effluent flows from the drain. This may be accomplished by a number of means, including the use of anti-ECF-L antibody, antisense S-oligonucleotide to ECF-L, mECF-L polyclonal antisera, rabbit preimmune antisera, OPG RANK-Fc and combinations thereof, as well as other inhibiting materials. When the symbols of such codes are received at a decoder in a reverse order during a reverse directional read, the decoder produces reverse directional syndromes S and converts the reverse directional syndromes S to syndromes S by multiplying S by k for kL, L1,. The mounting holes are preferably configured to provide adjustment of the leaves and hinged objects in at least two directions, which may be horizontal and vertical. In addition, the wafer chuck can be maintained at a constant temperature by circulating a liquid coolant through a conduit in the body of the wafer chuck.