Related by context. Frequent words. (Click for all words.) 62 sludge 58 effluent 58 brine 56 manure 56 slurries 54 liquid manure 53 dewatered 53 sumps 53 bentonite 52 solids 52 fly ash 51 dewatering 50 granulated 50 tailings 49 ammonia 49 compressed air 49 hydrofluoric acid 49 glycol 48 leachate 48 sediment 48 leaching 48 silt 48 Sludge 48 alkali 48 sewage sludge 48 sulfuric 47 grout 47 slag 47 coal slurry 46 sulfuric acid 46 sodium hydroxide 46 separator 46 flue gas 46 reservoir 46 vapor 46 silage 46 emulsion 46 pipework 46 sump 46 boron 46 granules 45 flowback 45 seawater 45 sorbent 45 groundwater 45 thickener 45 salt brine 45 activated charcoal 45 aerated 45 chlorides 45 nitrogen 45 lime 45 drilling fluids 44 mud 44 solvents 44 toxic sludge 44 methane 44 coal seam 44 silica 44 ash 44 nitrate 44 pumice 44 gravel 44 sulphate 44 separators 44 bicarbonate 44 pretreatment 44 molten metal 44 hydraulic fluid 44 water 44 remove impurities 44 treated effluent 44 molasses 44 silica sand 44 thickeners 43 sawdust 43 sandblasting 43 contaminated groundwater 43 acid 43 liquid 43 compaction 43 wastewater 43 sealant 43 piping 43 hydrochloric acid 43 biosolids 43 frack 43 grouting 43 Manure 43 vapors 43 chicken manure 43 cyanide 43 sulfate 43 silo 43 mine tailings 43 chlorine 43 oxidizer 42 frac 42 viscous 42 tailings dam 42 effluents