Related by context. All words. (Click for frequent words.) 74 desulphurization FGD 64 desulfurization FGD 60 flue gas 58 desulfurization gypsum 54 flue gases 54 hydrogen chloride 53 desulphurisation 53 emit sulfur dioxide 53 hydrochloric acid HCl 53 pyrolysis gasification 52 ammonia NH3 52 thermal oxidizers 52 FGD 51 low NOx burners 51 SO3 51 molecular sieve 50 thermal oxidizer 50 air cooled condensers 50 desulfurization 50 EtO 50 cyclohexane 50 wet scrubber 50 CFB boilers 50 fluidized 50 de ionized 50 offgas 50 SO2 emission 50 sulfuric acid mist 50 scrubber 49 Supercritical 49 ionic contaminants 49 desulphurization 49 plasma etching 49 sulfur trioxide 49 air cooled condenser 49 boiler feedwater 49 steam condensers 49 boron trifluoride 49 CFB boiler 49 molten salts 49 Electrostatic precipitators 49 activated carbons 49 absorption chillers 49 anaerobic fermentation 48 wet FGD 48 hydrofluorocarbons HFCs perfluorocarbons PFCs 48 sulfur dioxide nitrous oxide 48 catalytic reforming 48 diisocyanate 48 carbon adsorption 48 ethene 48 microfiltration reverse osmosis 48 Activated carbon 48 Nitrogen Oxide 48 Sulphur Dioxide 48 aqueous dispersion 48 Hydrogen Sulfide H2S 48 sludges 48 lime slurry 48 amine scrubbing 48 SF6 48 dry sorbent injection 48 absorption chiller 47 dioxide 47 Flue Gas Desulfurization 47 flue gasses 47 SO2 allowances 47 nitrogen oxides carbon monoxide 47 Hydronic 47 electrostatic precipitators 47 boilers furnaces 47 hydrogen chloride HCl 47 particulate matter sulfur dioxide 47 reduce NOx emissions 47 sulfur hexafluoride SF6 47 Nm3 h 47 oxidation catalyst 47 Combined Cycle IGCC 47 nitrogen NOx emissions 47 Flue Gas Desulphurization 47 cupola furnace 47 Flue Gas Desulphurization FGD 47 NOxOUT 47 scrubbers 47 vacuum distillation 47 nitrogen oxide emission 47 fluidized bed 47 Oxyfuel 46 HRSGs 46 sulfur dioxide SO 46 selective catalytic 46 centrifugal compressors 46 circulating fluidized bed 46 respirable 46 R #a refrigerant 46 ppbv 46 sulfur dioxide SO2 nitrogen 46 nitrogen oxides emitted 46 Nitrogen oxide 46 feedwater heaters 46 gases vapors 46 nitrogen oxide burners 46 CO2 CH4 46 gypsum byproduct 46 particulate matter PM#.# 46 frac flowback 46 particulate matter emitted 46 regenerative thermal oxidizers 46 SO2 sulfur dioxide 46 SO2 emissions 46 calcium oxide 46 inorganic nitrogen 46 regenerable 46 combustors 46 boiler flue 46 dedusting 46 H#SO# 46 inorganic salts 46 volatilize 46 desulphurization equipment 45 sulfur dioxide particulates 45 baghouses 45 gasifiers 45 emit GHGs 45 chilled ammonia 45 UCG syngas 45 nitrogen oxide NOx emissions 45 circulating fluidised bed 45 methane CH4 45 Sorption 45 vacuum degasser 45 adsorption isotherms 45 #MWe [001] 45 methanation 45 hydrogen H2 45 bioindustrial markets 45 vapor compression 45 nitrogen oxide NOX 45 thermal oxidation 45 fluorocarbons 45 coal pulverizers 45 particulate contamination 45 oxidation catalysts 45 sulfur dioxides 45 mercury sulfur dioxide 45 exothermic reaction 45 sludge drying 45 cordierite 45 leach CIL 45 ultraviolet UV disinfection 45 VOC abatement 45 pulp CIP 45 dimethyl sulphide 45 unburned hydrocarbons 45 Sulfur Dioxide 45 fluidized bed boiler 45 corona discharge 45 Nitrogen trifluoride 45 Meri Pori 45 Methane CH4 45 degasser 45 particulate matter soot 45 demineralized water 45 CFC refrigerants 44 DeNOx 44 Particulate emissions 44 calcium bicarbonate 44 reduces NOx emissions 44 nitric oxides 44 hydrogen sulphide H2S 44 carbonyl sulfide 44 dioxins furans 44 degassed 44 gasified 44 Alstom chilled 44 Nitric acid 44 perfluorocarbons PFCs 44 sulfur dioxide nitrogen dioxide 44 hydrocarbons carbon monoxide 44 nitrogen oxide NOx 44 rotary kiln 44 dioxides 44 melt adhesives 44 electrostatic precipitator ESP 44 Carbon Dioxide CO2 44 photoresist stripping 44 aeration basins 44 nitrogen oxides NOx emissions 44 thermal hydrolysis 44 supercritical steam 44 methyl chloroform 44 sorbed 44 aliphatic hydrocarbons 44 respirable particulate matter 44 mercaptans 44 mercury emitted 44 viscosity liquids 44 ammonia nitrogen 44 turbo generator 44 coagulation flocculation 44 butyl acetate 44 chemical solvents 44 condenser tubes 44 bubbling fluidized bed 44 unmineable coal seams 44 methyl chloride 44 paints sealants 44 RightTouch ™ capacitive sensing 44 nitrous oxides NOx 44 Sulfur Dioxide SO2 44 sulfur dioxide SO2 emissions 43 briquetting 43 Carbon dioxide CO2 43 titanate 43 particulate matter nitrogen oxides 43 flocculant 43 Scrubbers 43 C#H# 43 produced Friedlingstein 43 demineralised water 43 soluble salts 43 electrostatic precipitator 43 syngas 43 Nanofiltration 43 water reactor PWR 43 filtrations 43 nitrogen oxides NO 43 adsorbent 43 megawatt pulverized coal 43 dehumidify 43 N2O emissions 43 elemental sulfur 43 combustion byproducts 43 lb hr 43 acid neutralization 43 CO2 SO2 43 de nitrification 43 anthropogenic carbon dioxide 43 carbon dioxide nitrogen oxide 43 perfluorocarbons 43 saline formations 43 Fluid Bed 43 Reverse Osmosis RO 43 Combustion Turbine 43 carbon monoxide sulfur dioxide 43 baghouse 43 biofilter 43 benzothiazole 43 Adsorption 43 particulate matter emissions 43 degassing 43 nitrogen oxide sulfur dioxide 43 hydrogen sulfide H2S 43 centrifugal chiller 43 selective catalytic reduction 43 rotary kilns 43 supercritical fluid 43 pyrene 43 Sulphur dioxide 43 Purifier TM 43 biogases 43 nitrogenous compounds 43 electrochemically 43 urea ammonium nitrate UAN 43 precipitators 43 gasifies 43 Global Warming Potential GWP 43 dechlorination 43 calcination 43 biomass combustion 42 combustion turbine generators 42 methane oxidation 42 thermal decomposition 42 sulfur oxides nitrogen oxides 42 Aquionics 42 inorganic compounds 42 hydrogen purification 42 depolymerization 42 subbituminous coal 42 particulate contaminants 42 #MWe [002] 42 anthropogenic CO 42 sugar cane bagasse 42 torrefied wood 42 steam boilers 42 sulfur hexafluoride 42 Carbon Dioxide CO 42 digestors 42 carbon monoxide nitrogen oxide 42 ultraviolet irradiation 42 methane ethane 42 absorbs CO2 42 stoker coal 42 sludge dewatering 42 melt viscosity 42 Anaerobic digesters 42 carbon dioxide nitrous oxide 42 sulfur dioxide particulate matter 42 scfm 42 combustion 42 Sterilizers 42 sinters 42 ovens furnaces 42 nitrogen dioxides 42 formaldehyde benzene 42 NOx 42 methylene chloride 42 sulphate aerosol 42 limestone slurry 42 Autoclaves 42 Elemental mercury 42 hydrogen peroxide H#O# 42 sulfur dioxide emission 42 adsorbents 42 biomass biogas 42 ethyl acetate 42 Volatile Organic Compounds VOC 42 sulfur dioxide SO2 42 aeration basin 42 sequesters carbon dioxide 42 combustor 42 gasifies coal 42 Nd YAG lasers 42 thermal gradients 42 halocarbons 42 aerobic digester 42 hydro fluorocarbons 42 Circulating Fluidized Bed 42 isotopic signatures 42 NOxOUT ® Selective 42 Exhaust Gas Recirculation 42 Selective Catalytic Reduction 42 vanadium oxide 42 sorption 42 isobutylene 42 industrial degreaser 42 furans 42 ionized oxygen 42 Hydrogen Sulfide 42 kilowatt microturbine 42 filter cartridges 41 drilling muds 41 chlorinated solvent 41 emit fumes 41 #/kW 41 kWe 41 dielectric permittivity 41 benzene toluene 41 combustion gases 41 C#F# [002] 41 degreasing agent 41 Heat exchangers 41 Nitrogen oxide emissions 41 NOx emission 41 oxyfuel combustion 41 BIOX R 41 dioxide emissions 41 Refined Coal 41 magnetic separators 41 silicon dioxide SiO2 41 Combined Cycle Gas Turbine 41 outgas 41 absorber layer 41 nitrous oxide NOx emissions 41 Sulfur compounds 41 Sulfate 41 vapor extraction 41 ultra violet disinfection 41 Reverse osmosis 41 nitrous oxides 41 CO ₂ 41 Norit Americas 41 fluidized bed combustion 41 Nitrogen Oxides NOx 41 EAF dust 41 SCR catalytic converter 41 sulfur dioxide nitrogen oxides 41 Rich Reagent Injection RRI 41 NOX emissions 41 Daramic 41 Carbon monoxide byproduct 41 fluidized bed reactor 41 oxidizing agent 41 anerobic 41 R#a refrigerant 41 ultrafiltration membrane 41 crossflow 41 Chlorine dioxide 41 catalytic oxidation 41 ozone O3 41 inorganic ions 41 gasify coal 41 UV disinfection systems 41 GSHP systems 41 biomass pellets 41 cooling coils 41 magnesium silicate 41 melting furnaces 41 warewashing 41 tailpipes smokestacks 41 bacterial decomposition 41 terrestrial biosphere 41 ethoxylates 41 smokestack scrubbers 41 chlorine disinfection 41 oxidise 41 Flex Kleen 41 dissolved inorganic 41 suspended solids TSS 41 biodegraded 41 gaseous pollutants 41 sulfur dioxide 41 rotary heat exchangers 41 Calcium chloride 41 dinitrogen 40 denaturant 40 Liqui Cel ® 40 optically pumped 40 thermodynamic properties 40 MWCNT 40 reverse osmosis membranes 40 inorganic contaminants 40 E.ON Kraftwerke 40 Digesters 40 install scrubbers 40 adhesives sealants lubricants 40 resins engineered 40 mg/Nm3 40 sequester CO2 40 airborne particulate 40 desulfurizer 40 mist eliminators 40 Sorbent Technologies 40 CFCs HCFCs 40 formamide 40 Polycyclic aromatic hydrocarbons 40 R#A refrigerant 40 evaporators 40 EGR cooler 40 degasification 40 Zero Liquid Discharge 40 gypsum pond 40 airflows 40 isocyanate 40 scrubber sludge 40 MACT standards 40 Kulu copper 40 lignite coals 40 conventional pulverized coal 40 biofiltration 40 Particulates 40 NOx SOx 40 desorbed 40 Natrium W.Va. 40 gasification pyrolysis 40 respirable suspended particulates 40 #CVP 40 ultrasonic spray 40 UV disinfection 40 SO2 NOx 40 CdTe PV 40 desorption 40 GE Jenbacher biogas 40 Non Catalytic Reduction 40 LDLS 40 mineralize 40 soot particulates 40 Flue Gas 40 SO2 40 ICE ECX 40 Desulfurization 40 sludge lagoons 40 rotary hearth furnace 40 deplete ozone 40 Pyrolysis 40 hypergolic propellants 40 Ashta Chemicals 40 particulate filtration 40 Leach CIL 40 coal combustion byproducts 40 germanium antimony 40 gasified coal 40 carbon monoxide nitrogen oxides 40 #,# dichlorobenzene 40 C# microturbines 40 repels dust 40 coalmine methane 40 cogenerating 40 SOx NOx 40 sulfur dioxide emitted 40 hydrochlorofluorocarbon 40 halides 40 sludge digestion 40 microscopic airborne particles 40 HAPs 40 HAAs 40 ultra supercritical 40 HCGT 40 carbonize 40 sulfur oxide SOx 40 diesel oxidation catalysts 39 reduction SCR 39 Softwood hardwood 39 formate 39 installing scrubbers 39 butyl 39 combustion turbine 39 fluorinated chemicals 39 reinjection 39 sorbent 39 QGC coal seam 39 NOx nitrogen oxides 39 exceedence 39 nitrogen monoxide 39 coke oven plant 39 cogeneration plants 39 polyaromatic hydrocarbons 39 nitrogenous 39 turbine generators 39 MBBR 39 Puraflo 39 megawatt supercritical 39 cartridge filters 39 CO -2 39 amorphous silica 39 CyClean 39 sulfur dioxide nitrogen oxide 39 methane emitted 39 C1 C4 39 ATRP 39 degrease 39 SOx emissions 39 hydrocarbons nitrogen oxides 39 Sulfur dioxide 39 sulfur dioxide scrubbers 39 nitrides 39 Grätzel cells 39 CaCO 3 39 Acrolein 39 autoclaves 39 ozone nitrogen dioxide 39 ozone depleting refrigerant 39 ionizes 39 Particulate Matter PM 39 NO3 39 MW supercritical 39 Nitrogen NOx 39 anion exchange 39 regenerated catalyst 39 heptane 39 gases 39 deep saline aquifers 39 carcinogenic toxins 39 graphite oxide 39 synthetic gypsum 39 droplet sizes 39 carbon dioxide sulfur dioxide 39 carbon disulfide 39 #kW wind turbines 39 Selective Catalytic Reduction SCR 39 C# fullerenes 39 landfill leachate 39 biogenic 39 NOx combustion 39 ionic conductivity 39 laser irradiation 39 hydrofluorocarbons perfluorocarbons 39 hydroxyl radicals 39 IGCC plants 39 Desalting 39 argon fluoride 39 CO ² 39 VOC volatile 39 fume extraction 39 gasifying 39 absorption spectroscopy 39 thermoelectric cooling 39 cogeneration 39 monocrystalline cells 39 reverse osmosis desalination 39 particle filters 39 calcium fluoride 39 biomass cogeneration 39 3MW turbines 39 SCR catalyst 39 1mW 39 gaseous oxygen 39 7MW 39 hydroxyl radical 39 chlorophyll fluorescence 39 desiccants 39 heat trapping gasses emitted 39 digester tanks 39 evaporative 39 BIOGAS 39 Carbacid Investments 39 efficiency condensing boiler 39 enteric fermentation 39 RO membranes 39 microturbines 39 flyash 39 R #A refrigerant 39 regenerative thermal oxidizer 39 cleaning solvents 39 annealing temperature 39 oxidizing catalytic converter 39 potent greenhouse gas 39 Carbon Monoxide CO 39 membrane bioreactor 39 Danskammer 39 NOx nitrogen oxide 39 DFC#A power 39 rotary valves 38 sulfer 38 air pollutants emitted 38 bagasse cogeneration 38 chemically reactive 38 miscible 38 particulate opacity mercury 38 N2O 38 immiscible 38 HFCs perfluorocarbons PFCs 38 nitrogen oxides NOX 38 carcinogenic polycyclic aromatic hydrocarbons 38 condensable 38 Nitrogen Oxides 38 ozone particulate matter 38 ionisation 38 sulfur oxides SOx 38 halons 38 humidifying 38 steam turbine generators 38 megawatt Integrated Gasification 38 tunable diode laser 38 exhaust gasses 38 adipic acid 38 supercritical coal 38 #.#MW turbines 38 emitting fossil fuels 38 sulfur gases 38 synthetic liquid hydrocarbons 38 autoclaving 38 Enercon E# 38 Activated Carbon 38 gaseous emissions 38 acid sulphate 38 unburnt hydrocarbons 38 unheading 38 HCFC #b 38 Hydrazine 38 Volatile Organic Compound 38 Volatile Organic Compounds 38 ammonia 38 zero valent 38 sooty particles 38 sequester atmospheric 38 denitrification 38 silicate grains 38 VOC emissions 38 epoxides 38 carboxylic acids 38 Emission Reduction Units ERUs 38 isotopic ratios 38 condensing boilers 38 boron oxide 38 chlorine monoxide 38 condensing boiler 38 emit carbon monoxide 38 Ultrafine particles 38 Exhaled 38 CFBs 38 Technology MACT 38 Steam Assisted Gravity Drainage 38 seabed sediments 38 H#O# 38 Anaerobic Digestion AD 38 Reverse Osmosis 38 odor neutralizers 38 fluorinated greenhouse gases 38 carbonaceous material 38 Longannet coal 38 desalinate seawater 38 Sr Ca 38 bio char 38 photolysis 38 hydrides 38 sulfur dioxide nitrogen 38 megawatt cogeneration plant 38 oxidiser 38 screw compressors 38 coalfired power 38 forestry residues 38 oxy fuel 38 manganese oxide 38 oxygen isotope ratios 38 oxyfuel 38 oxidized mercury 38 photochemical reactions 38 Sterilizer 38 isoprene 38 #MW hydro [002] 38 Susquehanna Steam 38 pellet burners 38 Polybrominated 38 air conditioners dehumidifiers 38 WH Sammis 38 Diesel particulate filters 38 ionize 38 Heat Exchanger 38 unvented 38 Volatile Organic Compounds VOCs 38 Emitted 38 Chem Mod 38 arc furnace 38 unburned hydrocarbons carbon monoxide 38 Dioxane 38 gaseous chlorine 38 Dolet Hills 38 condenser coil 38 NOxOUT R 38 carbon dioxide CO ² 38 Carbonaceous 38 TVA Widows 38 nitrous oxide NOx 38 activated charcoal 38 subsurface soils 38 excrete methane 38 surface condensers 38 acid hydrolysis 38 mass flowmeters 38 washdowns 38 methane CH4 nitrous oxide 38 combi boilers 38 clarifiers 38 pollutants emitted 38 fluorotelomer 38 nitrogen oxides sulfur dioxide 38 mln kw 38 KleenJet ® Supreme 38 greenhouse gas nitrous oxide 38 Porto Tolle 38 nitrification 38 carbon dioxide CO2 38 finely dispersed 37 flux residues 37 stoichiometric 37 Shippingport Beaver County 37 evaporator coil 37 particulate emissions 37 silicate rocks 37 carbon dioxide equivalent CO2e 37 Burning fossil fuels 37 open hearth furnaces 37 sulfur 37 biomass gasification 37 nitrogen oxide emissions 37 N Viro patented 37 Nitrogen Oxide NOx 37 hydronic heaters 37 Integrated Carbon Capture 37 soot emitted 37 digestor 37 pyrogenic 37 biomass gasifier 37 Hydraulic Fluid 37 NH3 37 nitrous oxide N2O 37 biogas biomass 37 teragrams 37 carbon monoxide particulate matter 37 cement kiln 37 Cansolv 37 #-# CVP 37 pelletizing 37 yr -1 37 calorimeters 37 EGR Exhaust Gas Recirculation 37 Verified Emission Reductions VERs 37 quantum dots QDs 37 ammonia synthesis 37 anaerobic digesters 37 coke oven gas 37 fluorescence spectra 37 Maritza Iztok 37 carbon tetrachloride 37 abrasive blasting 37 Sodium hydroxide 37 Particulate Matter 37 filtration reverse osmosis 37 liquification 37 hydrogen deuterium 37 sulfur dioxide pollutant 37 zinc oxide ZnO 37 HFC #a 37 situ bioremediation 37 Intrinergy 37 #MW supercritical 37 nanodroplets 37 sodium sulfur 37 Nitrogen dioxide 37 pollutant emissions 37 sequestering CO2 37 submicron particles 37 Biomass boilers 37 reverse osmosis filters 37 filter cartridge 37 mixture CWM 37 metallic ions 37 Nitrogen oxides 37 phenol formaldehyde 37 NOx emissions 37 cyclic carbonates 37 Hatfield Ferry 37 Comanche Generating Station 37 absorbs carbon dioxide 37 converting cellulose 37 PCOR Partnership 37 fly ash 37 CdSe 37 reverse osmosis RO 37 rotary vane 37 Coleto Creek Power 37 hydrocarbons HC 37 supercooled liquid 37 forest thinnings 37 magnetocaloric effect 37 ozone particulates 37 exhaust backpressure 37 removing impurities 37 aftertreatment systems 37 boilers 37 solvents 37 sulfur oxide 37 combined cycle IGCC 37 absorbents 37 chromium plating 37 underground coal seams 37 NOX 37 combustion turbines 37 aqueous polymer 37 aeration tanks 37 diesel oxidation catalyst 37 volatilization 37 ash impoundment 37 reverse osmosis filtration 37 dehumidifying 37 NOx reduction 37 Belews Creek 37 nitrogen oxides 37 pyrometallurgical 37 containing soot dioxins 37 Emission Reduction Units 37 CarbonSMART ™ enterprise 37 biogas purification 37 gassification 37 WyGen III 37 portable steam cleaners 37 anaerobic oxidation 37 nitrogen oxide pollution 37 #MW biomass 37 XTreme Power ® XPH 37 sulfur dioxide emissions 37 colloidal suspension 37 VOC Volatile Organic Compounds 37 oxy coal 37 enzymatic hydrolysis 37 NOx trap 37 alkali atoms 37 liquid droplets 37 pollution abatement 37 bearing stratigraphy 37 stoves fireplaces 37 Krystallon 37 oxidizers 36 fluxes 36 manure decomposes 36 OWBs 36 LaTrobe Valley 36 #ft chimney 36 bicarbonate ions 36 cooled heat exchangers 36 emittance 36 gasses 36 NOxOUT CASCADE R 36 Volatile organic compounds 36 hydraulically fracture 36 carbon monoxide nitrogen dioxide 36 Lacq 36 polycyclic aromatic hydrocarbon 36 NGRN 36 aligned carbon nanotubes 36 emis sions 36 carbon monoxide hydrocarbons 36 HCCI mode 36 John Sevier Fossil 36 NOxOUT ® NOxOUT CASCADE 36 TransAlta Centralia 36 nitrogen oxides NOx 36 UV ultraviolet 36 Oxidizer 36 helium nuclei 36 Parker domnick hunter 36 spokesman Alfonso Quiroz 36 sequester carbon dioxide emissions 36 CO2 equivalents 36 baseload generating 36 R#a 36 graphitic carbon 36 Sani Dri 36 Skyonic 36 epitaxy HVPE 36 carbondioxide 36 Laser Skin Resurfacing 36 methane clathrates 36 parabolic trough technology 36 Selective Catalyst 36 dissolved solids 36 backwashing 36 lint traps 36 Combined Cycle 36 paste backfill plant 36 gallium selenide 36 preheaters 36 microcavities 36 filter impurities 36 mesoporous 36 Canadell 36 carpet shampooers 36 situ extraction 36 cenospheres 36 Diesel Particulate Filters 36 vapor degreasing 36 RenDiesel fuel 36 Heart Laser RenalGuard 36 renewably generated 36 halon 36 monomethyl hydrazine 36 electrons emitted 36 frac'ing 36 nano crystals 36 frits 36 compressor 36 microbes decompose 36 MW cogeneration 36 homogeneous catalysis 36 sulfide minerals 36 Ozone Depleting 36 silicon monoxide 36 Furnace Injection 36 cloud condensation nuclei 36 KGen Power 36 evaporator coils 36 nuclear fission reactors 36 particulate emission 36 Volatile Organic Compound VOC 36 gas chromatograph 36 pure ethyl eicosapentaenoic 36 chromium VI 36 Hydrogen Internal Combustion 36 Rovigo solar 36 isotope fractionation 36 environmentally hazardous substances 36 hydrated silica 36 acetonitrile 36 kerogen 36 singlet oxygen 36 metal nonmetal 36 degreasing solvents 36 hydrometallurgical processing 36 silica particles 36 AFUE 36 coarse particulates 36 sulfur diesel fuel 36 hydrochlorofluorocarbons 36 biofilters 36 efficiency condensing boilers 36 Cleco Rodemacher 36 smog forming compounds 36 total dissolved solids 36 particulate soot 36 Verified Emission Reductions 36 Three Gorges hydropower 36 diesel particulate 36 halobutyl 36 titania nanotubes 36 ultracold atomic 36 Belews Creek Steam 36 evaporative coolers 36 sealants adhesives 36 nitrogen NOx 36 Powerspan 35 carbon dioxide CO2 emitted 35 geological sequestration 35 biomass boilers 35 Dehumidifiers 35 carbon dioxides 35 anaerobically 35 reduce SO2 emissions 35 nonpoint source