Sustainable Treatment of Recalcitrant Compounds – A case Study Introducing Samuel is a graduate at WSP with experience in the collection of soil and groundwater data for environmental assessment and remediation. He has been involved in the implementation of various active treatment trials undertaken to inform site specific clean-up actions, as well as large-scale remedial works.
11
Embed
Sustainable Treatment of Recalcitrant Compounds …aclca.org.au › vic-docs › yps_presentation_final_aldous.pdfSustainable Treatment of Recalcitrant Compounds – A case Study Introducing
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Sustainable Treatmentof RecalcitrantCompounds – A caseStudy
Introducing Samuel is a graduate at WSP with experience in thecollection of soil and groundwater data forenvironmental assessment and remediation.He has been involved in the implementation ofvarious active treatment trials undertaken to informsite specific clean-up actions, as well as large-scaleremedial works.
WSP acknowledges the support of the client in the successful completion of the project
Background-Issue
Following closure of a former major hazard facility:
• Site effluent treatment plan was decommissioned.
• Sludge from the decommissioned effluenttreatment plant remained onsite, contained withingeo-fabric bags on drying beds (for approx. 10years).
• Sludge required treatment/disposal in accordancewith State regulatory requirements (IWRG 631).
50 m
Background-Extent ofcontamination
Sludge is categorised as Category A under IndustrialWaste Resource Guidelines (IWRG 631).
Summary of contaminants detected in geo-fabric bags(2013):
Baseline sampling (2017) reported that 99% of remainingcontaminant mass is TRH ସܥ-ଵܥ (~9.5 t).
Contaminant Range (mg/kg) % by contaminant
TRH ସܥ-ଵܥ 12,130-103,000 85
Sum of PAHs 50-9,250 7
Styrene 0.4-8050 5
Benzene 0.35-1600 1
Bis (2-ethylhexyl) phthalate 8.2-480 0.3
Objective The challenge:
- Category A Industrial Wasteà 10yr legacy issue
- Seeking a low cost and effective solution
The approach:
- Microbial activity is a proven approach
- Composting was seen as a sustainable solution
The objective of this pilot trial was to reduceconcentrations of contaminants by stimulating naturalbiodegradation by using microbes in a large compost pile.
Mixing - Sludge,straw and compost
• Sludge from 3 geo-bags(pilot trial) of totalvolume 150 ݉ଷ.
• Commercially availablecompost (for source ofmicrobes) of totalvolume 75 ݉ଷ
• Cereal straw (forincreasing oxygencontent) of total volume75 ݉ଷ
Process
Mixing - Sludge, straw andcompost
Bio-pile
Grinding mixture tohomogenise and decreasesize of sludge lump (increasesurface area).
Fully formed and mixed“bio-pile” approximately300 ݉ଷ.
• Did we stimulate microbes and reducecontamination…? YES
Changingtomorrowtoday
WSP is one of the world's leading engineering professional services consulting firms. Webring together approximately 42,000 talented people, based in 500 offices, across 40countries. We are technical experts who design comprehensive and sustainable solutionsand engineer projects that will help societies grow for lifetimes to come.
www.wsp.com
Should you have any questions please contact Sam atemail: [email protected]