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Bioremediation Technologies

Bioremediation Technologies. ENVM 644: New Technologies in Environmental Management Dr. Robert Beauchamp. BIOLOGIC PROCESSES. AEROBIC AND ANEROBIC AEROBIC: MICROORGANISMS NEED A CARBON & ENERGY SOURCE. TEMPERATURE & Ph MUST BE CONTROLLED. NUTRIENTS - NITROGEN & PHOSPHOROUS.

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Bioremediation Technologies

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  1. Bioremediation Technologies ENVM 644: New Technologies in Environmental Management Dr. Robert Beauchamp

  2. BIOLOGIC PROCESSES • AEROBIC AND ANEROBIC • AEROBIC: • MICROORGANISMS NEED A CARBON & ENERGY SOURCE. • TEMPERATURE & Ph MUST BE CONTROLLED. • NUTRIENTS - NITROGEN & PHOSPHOROUS. • pH 6 - 8 IS BEST. • NEED O2 AERATION. • TEMPERATURE > 150 IS BEST.

  3. BIOLOGIC PROCESSES (cont) • ANEROBIC DIGESTION • ABSENCE OF FREE O2. • CONVERTS HYDROCARBONS FROM COMPLEX TO SIMPLER MOLECULES & TO CO2 & METHANE. • REQUIRES NO POWER. • VERY HIGH ORGANIC DESTRUCTION RATES • METHANE CAN BE OF COMMERCIAL VALUE. • LESS LAND REQUIRED. • DISADVANTAGES: • MAY TAKE A LONG TIME. • EXPERIENCE LACKING. • DESIGN CAN BE DIFFICULT (pH = 6 - 8 IS BEST)

  4. BIOREMEDIATION TECHNIQUES • LANDFARMING • EXCAVATE OR TREAT SOILS IN-SITU. • LINE TREATMENT AREA • PLACE SOILS ON LINED AREA • APPLY NUTRIENTS & TILL SOIL • NEED 0.5 ACRES/1000 CUBIC YARDS OF SOIL

  5. BIOREMEDIATION TECHNIQUES (cont) • FACTORS FOR LANDFARMING • CONSIDERABLE AREA REQUIRED. • MINIMAL CONSTRUCTION. • MODEST OPERATION ACTIVITY • FAIRLY RAPID DEGRADATION • GOOD CONTROL • DEPENDENT ON SOIL TYPE • VOC's RELEASED INTO ATMOSPHERE

  6. BIOREMEDIATION TECHNIQUES • SOIL CELL METHOD • TREAT EXCAVATED AREA • LINED AND COVERED CELL • PRE-MIX SOIL WITH NUTRIENTS • INSTALL VACUUM SYSTEM TO ADD O2 • NEED 0.1 ACRES/1000 CUBIC YARDS OF SOIL

  7. BIOREMEDIATION TECHNIQUES (cont) • SOIL CELL FACTORS • MODEST AREA REQUIRED • MODEST CONSTRUCTION EFFORT • MINIMUM OPERATION ACTIVITY • MODEST DEGRADATION RATE • VOC's MAY NEED TREATMENT

  8. BIOREMEDIATION TECHNIQUES • IN-SITU METHOD • NO EXCAVATION • NUTRIENTS INFILTRATE DOWN • AIR MOVED THROUGH SOIL BY A PUMP & VACUUM SYSTEM

  9. BIOREMEDIATION TECHNIQUES (cont) • IN-SITU FACTORS • LEAST DISTURBS THE SITE • NUTRIENT ADDITION EASY OR DIFFICULT • IN-SITU VAPOR SYSTEM REQUIRED • GROUNDWATER MAY BE IMPACTED • SOILS MAY BE A PROBLEM • OPERATIONAL EFFORTS MINIMAL • OFF-GAS TREATMENT ADDS COST • LEAST FLEXIBLE & CONTROL • SLOWEST METHOD • NOTE: REMEDIATION TIME LANDFARMING< SOIL CELL< IN-SITU

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