TECHNOLOGY FOCUS - BIOLOGY - Preferred Process: The process comprises adding a solution of the microorganisms. The contacting step comprises: aerating the sludge with air; and dosing the biofilm with a microorganism solution to increase the microorganism population of the biofilm. The dosing is undertaken in a dosing regime of applying microorganism solution to the sludge about every three weeks for a period of 9-12 weeks. The treatment zone is a pit having a substantially impervious base. The treatment zone comprises a substantially impervious cover for covering the sludge. The method of making a bioremediation facility, comprises aerating the sludge during at least one of the forming step (c) and the degrading step (d). Preferred Components: The moisture content of the sludge is present at 5-20 (preferably 5-10) wt.%. The biofilm comprises microorganisms of Pseudomonas sp, Listeria sp, Arthrobacter sp and/or Alcaligenes sp, preferably Pseudomonas aeruginosa, Pseudomonas stutzeri, Listeria seeligeri and/or Alcaligenes faecalistype II. The Bacillus sp. is Bacillus lentus, Bacillus megaterium, Bacillus pumilus, Bacillus cereus, Bacillus subtilis, Bacillus sphaericus and/or Bacillus licheniformis. The Acinetobacter sp. is Acinetobacter haemolyticus or Acinetobacter baumannii. The Brevibacillus sp is Brevibacillus brevis. The microorganism content of the microorganism solution comprises 30-70 vol.% of microorganisms in a microorganism culture. The microorganisms of the microorganism solution are microorganisms of Bacillus lentus, Bacillus megaterium, Bacillus pumilus,Bacillus cereus, Bacillus subtilis, Bacillus sphaericus, Bacillus licheniformis, Brevibacillus brevis, Pseudomonas aeruginosa, Pseudomonas stutzeri, Listeria seeligeri, Acinetobacter haemolyticus, Acinetobacter baumannii and/or Alcaligenes faecalis type II. The kit further comprises one or more additives or nutrients, where the additives or nutrients are capable of enhancing the growth and biofilm formation of the microorganisms in the solutions.