Automotive Components & Metal Engineering in Johor: Electroplating Effluent, Scheduled Wastes & TNB Power Compliance Guide

Automotive-component and precision metal-engineering plants cluster in Johor’s established heavy-industry zones of Pasir Gudang and Tebrau. The sector spans engine and component casting, body-panel stamping, precision gear machining and metal surface-protection finishing. Its compliance focus rests on the leak-free physico-chemical treatment of heavy-metal electroplating effluent, on managing voltage flicker and harmonics generated by high-power melting equipment, and on the time-limited, traceable handling of hazardous waste oils and spent pickling acids.

Whether a metal project needs an EIA depends on its activity and capacity under the Environmental Quality (Prescribed Activities) (Environmental Impact Assessment) Order 2015, made under section 34A of the Environmental Quality Act 1974 (Act 127). Primary smelting of aluminium or copper (all sizes), and iron-and-steel production using iron ore at 100 tonnes or more per day — or scrap iron at 200 tonnes or more per day — are Second Schedule activities requiring an EIA report to DOE headquarters with a public display. By contrast, a standalone electroplating or metal-finishing workshop is generally not a prescribed EIA activity; instead it must give the DOE prior written notification under regulation 4 of the Industrial Effluent Regulations 2009 before any work that creates a new effluent source, and comply with the discharge standards below.

Metal pickling and electroplating generate concentrated heavy-metal acidic and alkaline wastewater, governed by the Environmental Quality (Industrial Effluent) Regulations 2009 [P.U.(A) 434/2009]. The industrial effluent treatment system (IETS) typically uses multi-stage chemical reaction, cyanide destruction, hexavalent-chromium reduction and heavy-metal precipitation, and the limits are among the strictest in the schedule. Standard A applies where the discharge point lies upstream of a gazetted water catchment; Standard B applies otherwise. Where two or more of the listed heavy metals are present, regulation 11 also caps their combined concentration, raising the bar for multi-metal co-precipitation.

Metal engineering and machining generate corrosive, metal-bearing and cyanide-containing waste liquids, sludges and spent oils, regulated by the Environmental Quality (Scheduled Wastes) Regulations 2005 [P.U.(A) 294/2005]. These must be held in corrosion- and leak-resistant dedicated containers within a purpose-built store on secondary containment sized for 110% of the largest container. On-site storage is limited to 180 days or less, and accumulation must not exceed 20 metric tonnes without prior written DOE approval. All transfers run through the DOE electronic consignment (e-Consignment) system to a contractor and disposal facility holding the relevant DOE prescribed-premises licence; any unlawful dumping or dilution discharge is strictly prohibited.

Heat-treatment furnaces, large air compressors and hydraulic presses commonly bring steam boilers, unfired pressure vessels and air receivers within scope. Following the repeal of the Factories and Machinery Act 1967 on 1 June 2024, these are regulated under the Occupational Safety and Health Act 1994 (as amended by the Occupational Safety and Health (Amendment) Act 2022) together with the Occupational Safety and Health (Plant Requiring Certificate of Fitness) Regulations 2024 [P.U.(A) 99/2024]. Design information is submitted to the Department of Occupational Safety and Health (DOSH); the plant is inspected by a licensed person; and a Certificate of Fitness (CF) is issued with a validity of 15 months, renewable only after a periodic inspection before expiry.

Induction melting furnaces, large compressor banks and hydraulic stamping lines generate severe voltage flicker and harmonics that can affect neighbouring sensitive industrial users. Under the Electricity Supply Act 1990 (Act 447), the single-line diagram signed by a registered Professional Engineer is submitted to the Energy Commission (Suruhanjaya Tenaga, ST), and the connection follows TNB’s Electricity Supply Application Handbook (ESAH). Plants must install active power filters (APF) or static VAr generators (SVG) at the main switchboard to suppress harmonic feedback so that power quality at the TNB point of common coupling (PCC) stays within the limits below.