TECHNOLOGY FOCUS - BIOTECHNOLOGY - Preferred Process: In (M1), the GB2 consortium comprises bacteria such as Methylobacterium radiotolerans GB21, Klebsiella oxytoca GB2CS, Agrobacterium tumefaciens GB2GA, Aureobacterium GB2 and three strains of unclassified bacteria GB23, GB292 and GB272. The GB2 consortium forms biofilms on solid surfaces when cultured in the presence of the alkylphosphonate. The alkylphosphonate solution has initial concentration of alkylphosphonate of 2.1-4.2 g/l. The culture is formed at a temperature of 28-29 degrees C. The step of adding carbon source involves adding the carbon source, selected from corn syrup solids, corn syrup and glucose, to the culture to give a final concentration of 20 g/l. The residence time in the first reactor is 3-7 days and in the second reactor is 2-3 days. Biodegradation occurs in the presence of fluoride ion concentration equimolar to the concentration of the alkylphosphonate. EXAMPLE - Preparation of the GB2 consortium for biodegradation of isopropylmethylphosphonic acid (IMPA) was carried out as follows. The GB2 consortium was composed of bacteria such as Methylobacterium radiotolerans GB21, Agrobacterium tumefaciens GB2GA, Klebsiella oxytoca GB2CS GB272, Aureobacterium GB2, GB23 and GB292, where GB23, GB292 and GB272 are unidentified organisms, The organisms were derived from cultures selected for ability to use IMPA as a sole carbon source, and sequencing batch reactors degrading hydrolyzed VX (O-ethyl-S-2(diisopropylaminoethyl)methylphosphonothiate) or Sarin (O-isopropylmethylphosphofluoridate) as a sole phosphorus source served as the inoculum for the enrichments. The reactors operated continuously for several months or years under specific conditions, which forced the resident microbial population to evolve specialized processes for organophosphonate biodegradation. The GB2 consortium biodegraded hydrolyzed GB (GBH) as the sole carbon and phosphorus source under aerobic culturing conditions at 28-29degreesC, when provided at a concentration of 80 ml/l. The organophosphonate substrates (e.g. GBH, MPA) were added to a final concentration of 2.7 mM. The GB2 consortium was transferred to fresh GBM, and inoculated from the GBH and VXH sequencing batch reactors. The organisms were capable of utilizing IMPA or MPA as sole carbon or phosphorus source. The biodegradation of hydrolyzed Sarin by the GB2 consortium was greatly enhanced in the presence of piperazine alkylsulfonic acid and N-(2-hydroxyethyl)piperazine-N'-ethanesulfonic acid (HEPES). Thus, IMPA biodegradation was greatly improved when compared to unbuffered cultures. The GB2 consortium such as GB23, GB272 and Methylobacterium radiotolerans GB21 resulted in excellent biodegradation (greater than 90%) of IMPA to MPA.