treatment of norm-contaminated sludge & soil from the petroleum industry pdo norm workshop
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Treatment of NORM-Contaminated Sludge & Soil from the Petroleum Industry PDO NORM Workshop February 21-23, 2005. Proxima Cancorp Petrozyme Technologies EnviroGem. Contents. Introduction Approach to the treatment of hydrocarbon & NORM contamination - PowerPoint PPT PresentationTRANSCRIPT
Treatment of NORM-Contaminated Sludge & Soil
from the Petroleum Industry
PDO NORM Workshop February 21-23, 2005
Proxima CancorpProxima Cancorp Petrozyme TechnologiesPetrozyme Technologies
EnviroGemEnviroGem
•Introduction •Approach to the treatment of hydrocarbon &
NORM contamination•Treatment of hydrocarbon contaminants – Stage 1•Treatment of NORM
Stage 2 – Solubilization Stage 3 – Filtration Stage 4 – Polymerization
•Treatment objectives•Proposed pilot & full scale implementation•Conclusion
Contents
Dr. Ajay Singh
• Director of R&D, Petrozyme Technologies• Adjunct Professor University of Waterloo• Specialization - microbial biotechnology• Published in excess of 120 research papers• Holds 5 patents • Co-authored and edited 5 books related to
biotechnology, fermentations, bioremediation and phytoremediation
• Developed biological waste treatment processes related to the petroleum industry
• International experience (US, Canada, India, Germany, Japan, Venezuela, Mexico, Saudi Arabia)
Dr. Perichiyappan Senthilnathan
• Technical Director of EnviroGem Inc.• Consulting advisor to various industries for
water and wastewater treatment including Bristol-Myers Squibb, Johnson & Johnson, Pfizer, Merck, Uniroyal, Exxon and Cargill
• Dr. Senthil is the expert in waste water treatment and has isolated and removed metals & radionuclides from water using selected membrane filters
• 30 years in waste water treatment
Peter Cheong
• Principal, Proxima Cancorp Inc.• Director & Founder of Petrozyme Asia
Ltd. – currently actively bidding on all major petroleum sludge/contaminated soil remediation jobs in Asia & Middle East
• Chartered Accountant – PwC, E&W• Assembled a team of scientists to
provide a solution for NORM• Role – project & cost management
Treatment Rationale
• Had to look out of the box for a more cost effective solution
• The risk of NORM comes from small particles of radioactive metals
• Treat the cause not the symptom• Solution had to isolate the NORM and
then manage along with other metals
Treatment Process
• An advanced four-stage integrated bio-physico-chemical process to treat NORM-contaminated oily sludge & soil from the petroleum industry
• Each of the stages in this process has been field proven
Four-Stage Process Flow
NORM-free Water for
reuse
NORM Oily sludge
AirMicrobesNutrients
Water
Oil Sorption & Separation
(4 - 6 h)
NORMContaminated soil
Bioreactor(10 – 12 d)
Water way, Drains, Recycling
Membrane rejects
NORMWaste water
Clean water
NORM Solubilization
Polymerization of
Radioactive residues
Treated solids Dispos
al
NORMContainmen
tSealing Disposal
Dewatering
WastewaterUltrafiltrationNanofiltration
Reverse Osmosis
Stage 1 – Removal of hydrocarbons
• biological process for oily sludges • physico-chemical process for
hydrocarbon-contaminated soils• bioreactors and mixers will provide added
shielding from NORM for the operators• water is an integral part of both these
processes
Stage 1 – oily sludges
• subjected to bio-treatment in a slurry bioreactor using the patented “Petrozyme Process”
• microorganisms, a blend of proprietary nutrients and optimized air flow facilitate accelerated biodegradation of petroleum hydrocarbons
• result is a >90% TPH removal in 8 to 12 days.
Example of Bioreactors
Stage 1 – contaminated soils
• for low oil-contaminated soils (<8% TPH), “Remsep” is used
• patented 2-phase remediation & separation process
• hydrocarbons are separated using hydrophobic sorbents & mobilizing agents in mixers
• removal of >90% of TPH in treatment periods of 4 to 6 hours.
Stage 1 – Remsep
Stage 2 - Solubilization
• solubilization done in tanks • process proven on uranium, radium,
thorium & strontium • proprietary list of reagents containing
selected ligands are used to solubilize radioactive & inorganic elements
• challenge is to ensure no reaction among reagents
• treated sludge/soil is dewatered & solids are sent to a suitable landfill
Stage 3 - Filtration
• filtrate containing radioactive elements & metals from stage 2 are subjected to a series of ultrafiltration, nano/diafiltration & a high-pressure high-rejection reverse osmosis (RO) system
• proven on uranium, radium, thorium & xanthium • residues from nano/diafiltration & RO systems
containing concentrated radioactive high-molecular weight elements & metals are collected in residue storage tanks
• Permeate from RO unit free of radioactive elements is either discharged to local sewer/water bodies or re-used in the upstream processes
Stage 4 – Polymerization &
containment
• contents of residue storage tank are water reduced
• polymerize residues • polymers are stable indefinitely• material is contained within non-reactive
Uranium containers or metal drums & sealed
• ultimate disposal in secured landfills
Stabilization/Containment Solutions
• Superior qualities in:• Shielding operators• Isolating radionuclides• No structural damage from radiation (gamma)• Retaining radio isotopes• No biodegradation• No leaching issues• Significant reduction in final landfill cost
• Process cost – US$1,200 to $1,500 per ton* plus landfill cost of NORM free solid material from the Petrozyme/Remsep Processes
* Based on 10k m3 of sludge/contaminated soil
Treatment Objectives
• meet the actionable level set by the International Atomic Energy Agency– isotopic activity in treated solids & effluent not
to exceed 0.5 Bq/g for Ra226
• show process has successfully isolated radionuclides and retained radio isotopes – based on standards set by US EPA,
Department of Energy and the Nuclear Regulatory Council
Proposed pilot
• demonstrate that petroleum hydrocarbons can be effectively degraded or removed from sludges & contaminated soils
• NORM present in sludges & soils can be effectively treated/stabilized using our approach
• approach is scalable• length & cost of pilot
Full Scale Implementation
• JV with local company
• Oil co options:– We supply all equipment– Except for Bioreactors & NORM related
equipment, Oil co supplies some or all equipment (Capex)
Conclusion
• Process addresses, isolates & treats hazardous materials (toxic organic compounds, metals & radionuclides)
• Technically advanced• User friendly• Efficient• Cost effective• No legacy issues