Norsk Hydro ASA · OSL:NHY
Norsk Hydro ASA — Technical Presentation (March 2018)
14 slides from Norsk Hydro ASA's technical presentation, March 2018
Slide 1: Review of Water and Effluent Management
Review of Water and Effluent Management Alunorte Environmental Consultancy and Engineering Barcarena/PA +55 11 3217 6300 | www.sgwservices.com Investigation | Remediation | Audits | Permitting | Consultancy
Slide 2: Scope and Objectives
Scope and Objectives ✓ Independent Assessment of the Refinery Water and Effluent treatment management system. ✓ Focus on the intense rain event occurred on February 16th and 17th that caused flood at Barcarena region. ✓ This review is preliminary and the works are ongoing. ✓ The objective is to veri
Slide 3: Inoe Lovett Rapin
Inoe Lovett Rapin
Slide 4: Alunorte refinery and surroundings map
Slide 5: Refinery site layout
Slide 6: Rain events on Feb 16th and 17th
Rain events on Feb 16th and 17th 224mm rain in 10 hours ✓ There was no overflow at the solid waste basins - DRSs ✓ There was a Flood in Area 45 - The rainwater leakage occurred by a cracked deactivated pipe. Visual inspections and soil pH measurements results did not identify environmental alteratio
Slide 7: Refinery areas affected: WWTP and Area 45
Slide 8: Water Balance Simulation performed by SGW
Water Balance Simulation performed by SGW SGW performed a Water Balance simulation of the days16 and 17 ✓ WWTP basins volumes did not have capacity to handle the unusual rainfall event; ✓ DRSs capacities sufficient WWTP Basins Capacity DRS1 Basins Capacity DRS2 Basins Capacity 80 000 1 000 000 600 0
Slide 9: Sampling
Sampling As the existing data was not enough for a precise analysis of the Alunorte’s contamination potential, SGW carried out a sampling in the environmental: Surface water (Para and Murucupi rivers), effluents and mining pipeline; Soil, Bauxite, Coal, Ashes, Red Mud. Well water from the Bom Futuro
Slide 10: Sampling points
‘Sampling points Bi Shai
Slide 11: Parameters
Parameters Aluminum ‘Antimony Phosphorus Note: (1) CONAMA 3: T: total metals; D: dissolved metals.
Slide 12: Sampled points
| Sampled points Si shallo Aluminum Lead Iron Note: (1) Drinking water standards (ANEXO XX DA PORTARIA DE CONSOLIDAGAO Ni’ 5, de 28 de Setembro de 2017) T: total metals D: dissolved metals
Slide 13: Conclusions
Conclusions ✓ Leakage from Sump 45 is not sufficient to cause significant environmental contamination. ✓ Emergencial discharge into Canal Velho – mainly stormwater – no significant impact in the Pará river ✓ Volumes discharge x river flow ✓ There was no overflow at the solid waste basins - DRSs ✓ En
Slide 14: Environmental Consultancy and Engineering
Environmental Consultancy and Engineering [email protected] | www.sgwservices.com Investigation | Remediation | Audits | Permitting | Consultancy