Transcript Mr. Jihad Shana`a
Recovery of Oil from Sludge Pits Using a Three Phase Centrifuge
23 rd Joint GCC-Japan Environment Symposium Jihad Shanaa Environmental Protection Department Dec. 15-17, 2014 © Copyright 2014, Saudi Aramco. All rights reserved.
Presentation Outline • • • • • • • Typical Industrial Waste Generated by Oil &Gas Industries Sources of Oily Waste Generation Environmental Impacts Oily Waste Management Saudi Aramco WM Objectives Case Study – GOSP Summary
Typical Hazardous Waste Streams Generated O&G Industries • • • • • • • Oily water Oily sludge Spent catalyst Spent caustic Spent cleaning solvents Spent filters Pyrophoric scales • • • • • Contaminated soil Contaminated drums Infectious/medical waste Radioactive waste Laboratory waste
Sources of Oily Waste Generation • • Upstream Activities – – oily pits Drill cutting waste Downstream Activities – Refinery wastewater sludge – – Tank bottom sludge Pipeline scraping facilities
Environmental Impacts • • • • • • • Health Soil degradation Groundwater contamination Surface water Flora and fauna Air quality Property value
Oily Waste Management – Old Practices • Land farming – – Resource degradation Soil and groundwater contamination – Liability risks – Works only under controlled environment – Requires constant monitoring
Oily Waste Management — New Practices • Resource recovery technologies – Three phase centrifuge – Thermal desorption – Waste to energy • Bioremediation – Resource recovery is no longer feasible – Reduce contaminants concentration – Effective under controlled conditions
Saudi Aramco WM Objectives • • • • • • Minimize waste generation Recover resources from waste Seek best demonstrated environmental technologies Protect soil and groundwater Protect human health and ecological resources Preserve land for future generations
Case Study • •
Project Objectives
Decontamination of oily sludge pond – – – Removal of liquid Recover saleable oil Treat wastewater Enhanced bioremediation – – Biopile technology for contaminated sand Bioreactor technology for oily sludge
Centrifuge Setup for Oil Recovery
Separation of Oil, Water and Solids • Three-Phase Centrifuge Unit – – Production capacity -10 m 3 /h Quick mobilization and demobilization time – – Removal of oil and sludge Heat treatment – Centrifugation to separate oil, water and solids – Over 8,500 m 3 treated of oily water
Engineered Biopiles
Process Condition in Biocells • • • • • • • Microbial inoculum developed onsite Moisture: 8-12% pH 6.7 – 7.4
Total microbial count: 105 – 108 CFU/g Air supply Covered to retain moisture Treatment time 4-12 weeks
Biopile Treatment Results
Average TPH and Moisture Treatment Biocells
Treated Biocell Being Leveled
Recovered Oil Sample • • • Around 50,000 bbl of oily sludge removed from the pit 47,000 bbl (>7,700 m 3 of oil recovered ) Recovered oil value covered remediation costs and generated revenue
Summary • • • • • Successful demonstration of bioreactor technology for oily sludge treatment. Oily waste shall be looked at as a resource NOT waste. as a Recovery of oily waste reduces environmental risks and increases company revenues Bioremediation can reduce hazardous contaminants in soil and meet regulations Onsite recovery and bioremediation reduces transportation risks