We named our bioremediation system as ‘ChromeBac’ as a trademark. The system was invented to overcome the conventional remediation processes for soils and wastewater contaminated with Cr (VI) involves physical and chemical technologies that are expensive and produce secondary waste streams that require further treatment. Hence, our system is originally a biological reduction of Cr (VI) using indigenous microorganisms offer a new cost-effective and environmentally compatible technology.


  • Consists of bioreactor, precipitation, activated carbon filter and final aeration unit (for COD)
  • Inflow Cr(VI) up to 150mg/L
  • Outflow Cr(VI) less than 5mg/L (after bioreactor)
  • Remaining Cr(VI) will be removed using AC filter
  • Temperature of incoming wastewater 25 – 37oC
  • Incoming pH of 7.0 ± 0.5
  • Cr(VI) reduction efficiency of >95%
  • Chemicals needed only for neutralization and precipitation
  • Up to 50 % reduction in sludge generation
  • Robust against fluctuations in wastewater
  • Can act either as primary or tertiary treatment unit
  • Simple assembly
  • Small space requirement
  • Low nutrient requirements
  • Meeting the wastewater discharge limits (Std. B)


  • The invention is to offer new solution to replace the conventional treatment to treat Cr (VI) waste water using biological treatment which is an environmental-friendly system.
  • Biological treatments arouse great interest because of their lower impact on the environment as opposed to chemical treatments.
  • The invention guarantee a low cost service and easy to handle.


  • Novel features of this system are use of liquid pineapple waste to propagate bacteria, solid pineapple waste and wood-husk used as support material for bacteria and reduction of chemicals consumption by 60 % compared to conventional method. BOD and COD concentrations were also treated to permissible discharge levels.


  • ChromeBac is targeted for industries that utilize Cr (VI) in its operation such as electroplating, textile, leather tanning, oil refinery and wood preserving.
  • Local municipal councils or government bodies (such as DOE) that are faced with the task of cleaning up Cr-related environmental pollution.
  • Awareness of the public regarding the risk of Cr (VI) seepage from the industry into the water system which may lead to toxicity, mutagenicity and carcinogenicity.
  • There are 20 companies around Malaysia that will be our target market and already expressing interest.


  • Provide a cost- effective solution that enable industries such as small medium enterprise to use the product to treat Cr waste, hence to overcome the environmental pollution matters.
  • Microorganisms could offer new tools to degrade or transform toxic contaminants, such as Cr(VI), by more economical as well as eco-friendly technologies.
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