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NATSURV 17: Water and Wastewater Management in the Iron and Steel Industry (Edition 1)
Expanded Title:The purpose of NATSURV 17 is to review the status of the South African Iron and Steel Industry with specific focus on national production capacity, specific water intake and effluent volumes, specific energy consumption rates and best practices in the management of water and effluent. The study includes an evaluation of the most pertinent legislation that regulates the industry on national and local levels. Five companies operate Iron and Steel mills in South Africa. One of these companies declined to participate, with the other four providing information to different levels of completeness. Due to the severe economic pressure in this sector, one of the four companies went into business rescue procedures and another entered a round of retrenchments with the result that these two companies could not provide all requested information due to limited resource availability. Thus only a limited amount of data is available. Raw water intake to the manufacturing process is usually derived from a water resource where the abstraction is authorised by the Department of Water and Sanitation, or from the local municipality. The Specific Water Intake (SWI) for the four sites for which data was received varied between 2.3 and 9.3 m3/t. The Specific Effluent Volume (SEV) generated varied between 0.9 and 3.6 m3/t. Different volumes and quality of wastewater (effluent) are produced during the manufacturing processes. Effluents are treated via a range of treatment technologies which include clarification, activated sludge, dissolved air floatation and evaporation. The treated effluent is discharged to the receiving environment or reused / recycled to the manufacturing process where technically feasible. The variation between water intake and effluent generation is a function of a range of factors such as age of facility, technology selection and product produced. Depending on the product range, the concentration of various metals used on site are also monitored. Energy awareness has also grown in the industry, both as a result of increasing electricity costs as well as due to the detrimental effect of load shedding. The study found that the industry is extensively regulated through national legislation (in particular water use authorisations), municipal trade-effluent bylaws, as well as national and international norms and standards such as ISO and SANS. The study shares perspectives by the industry and the regulator pertaining to the use of water and effluent targets and compliance with norms, standards and specifications. It is recommended that continuous improvement focusing on improved SWI and SEV target continue to be used in this industry; and that research continues to explore the energy and resource recovery potential associated with the industry.
Date Published:01/01/2017
Document Type:Research Report
Document Subjects:Wastewater Management - Industrial
Document Keywords:Pollution control
Document Format:Report
Document File Type:pdf
Research Report Type:Technical
WRC Report No:TT 705/16
ISBN No:978-1-4312-0872-2
Authors:van der Merwe-Botha M; Steytler B; Wille P
Project No:K5/2422
Organizations:Water Group Holdings (Pty) Ltd; Prodromos Technologies (Pty) Ltd
Document Size:2 970 KB
Related Documents:NATSURV 1: Water and wastewater management in the malt brewing industry - (EDITION 2)
NATSURV 12: Water and Wastewater Management in the Paper and Pulp Industry (Edition 2)
NATSURV 2: Water and Wastewater Management in the Metal Finishing Industry (Edition 2)
NATSURV 3: Water and Wastewater Management in the Soft Drink Industry (Edition 2)
NATSURV 5: Water and Wastewater Management in the Sorghum Brewing Industry - (EDITION 2)
NATSURV 6 Water and Wastewater Management in the Edible Oil Industry (Edition 2)
NATSURV 8: Water and Wastewater Management in the Laundry Industry (Edition 2)
NATSURV 7: Water and Wastewater Management in the Red Meat Abattoir Industry (Edition 2)
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