1. Profile

(1) Project site:

Kuantan, Malaysia.

(2) Owner:

Alliance Steel (M) Sdn Bhd.

(3) Capacity:

600 m³/h wastewater treatment.

(4) Date of operation:

March 2018.

(5) Investment, construction and operation:

It was invested, built and operated by the Owner

2. Major environmental problems to be addressed

Comprehensive treatment and reuse of wastewater from the entire steel mill; collection and reuse of rainwater throughout the steel mill; wastewater treatment and reuse of steelmaking, ironmaking and coking circulating water.

3. Environmental standards and/or main index limits to be followed

The Chinese standard and Malaysian standard shall be followed, with the emission limits of major pollutants: COD_cr≤200 mg/L, grease ≤10 mg/L, SS≤100 mg/L, BOD₅≤50 mg/L, pH5.5~9, etc.

4. Technological process

Production wastewater → bar screen → regulation → multi-flow intensive clarifier → V filter → reuse water pool → user. After the production wastewater (except coking phenol-cyanogen wastewater, power plant desulfurization wastewater, sintering desulfurization, strong brine of demineralization station and other special wastewater) from all units of MCKIP is subject to centralized treatment in the wastewater treatment plant of the steel mill, and some are reused as reuse water for slag flushing, slag treatment, sintering desulfurization and so forth of blast furnace. Some are mixed with the collected rainwater and the production new water according to a certain proportion and used as water supplement for the production-firefighting water pool. After filter-pressing and dewatering, the sludge is transported to the outside for disposal.

5. Environmental pollution control effects

For the influent, COD_cr≤50 mg/L, grease≤10 mg/L, SS≤300 mg/L, BOD₅≤20 mg/L, pH6~9; for the effluent, COD_cr≤35 mg/L, grease≤1mg/L, SS≤10 mg/L, BOD₅≤15 mg/L, pH6~9.

6. Social benefits

The project employed about 180 local people, operated smoothly and was recognized by the local government and the Owner.

7. Economic benefits

It saves MYR 25.2 million (about RMB 40 million) every year for the Owner.

Project significance: MCKIP was jointly established by Kuantan, Malaysia and Jinzhou City, Guangxi Zhan Autonomous Region. The 3.5 million t/a iron & steel base project of MCKIP was one of the first projects built in MCKIP and a key project in the construction of the “Belt and Road”.