The Brogborough test cells were initiated in 1986 to demonstrate several ro
bust and easily applied techniques for accelerating waste degradation in la
ndfill, principally as a means of enhancing energy; recovery from lanJfrll
gas. This raper maps the project up to July 1998. The main conclusions are
listed below. The Brogborough test cells data set includes over 9-years con
tinuous flow data - longer than any other large scale landfill test program
me. Specific yield data are 2 to 3 times higher than published data from co
mmercial landfills - even from the control cells - indicating increased rec
overy as a result of the idealized landfill engineering and gas abstraction
systems in place. Cells 5 and 6 (in situ treatments) produced more rapid m
ethanogenesis, as designed. Cells 3 and 4 (applied treatments) have shown s
tatistically significant enhancement in landfill gas production rates relat
ive to the control cell of 20 to 30% in specific yield. Total yields have e
xceeded 113 m(3) t(-1).