• :::Home
  • HK Technologies
  • Cultivation of Aniline-degrading Bacteria to Enhance Textile Dyeing Wastewater Treatment

Cultivation of Aniline-degrading Bacteria to Enhance Textile Dyeing Wastewater Treatment


Through a novel process of DNA identification, cultivation, enrichment and immobilisation of specialised microbial strains to control and enhance the population of aniline-degrading bacteria in biological wastewater treatment. Aniline compounds can be removed effectively from the textile dyeing wastewater.

  • Cultivation of Aniline-degrading Bacteria to Enhance Textile Dyeing Wastewater Treatment  0
Technical name of innovation
Biodegradation of Aniline Compounds and Enhanced Color Removal for Textile Dyeing Wastewater Through Cultivation and Immobilization of Intensified Microbial Strains in the Existing Wastewater Treatment Process
Research completion
Commercialisation opportunities
IP owned by HKRITA
Problem addressed

Aniline compounds are micro-pollutants in textile dyeing wastewater which are recognised as environmental endocrine disruptors that endanger human health and cause serious environmental pollution. China has implemented new stringent discharge standard that requires aniline compounds concentration down to below detection limit (i.e. 0.03 mg/L) in 2015. Traditional wastewater treatment systems cannot effectively remove aniline pollutants, leading to high chemical consumption and operation costs.

  • Identification of aniline compounds-degrading bacteria through DNA sequencing of the indigenous microbial population in the existing textile wastewater treatment plants
  • Cultivation and enrichment of aniline compounds-degrading bacteria by using the untreated wastewater from existing treatment facilities and aniline compounds
  • Immobilisation of enriched microbial strains as biofilm on MBBR carriers
Key impact
  • The taxonomic identification method developed can enable an in-depth understanding of the microbial population in biological treatment
  • The integrated method of taxonomic analysis, microbial enrichment and immobilisation can optimise the microbial composition so as to increase the specialised microbial populations
  • This invention provides a sustainable and economic solution for textile wastewater treatment by eliminating the use of physiochemical treatment, reduction of capital investment and long-term operating cost.
  • Gold Medal at the “2021 Geneva International Exhibition of Inventions”


  • China Invention Patent (File no.: 342915055)
  • Hong Kong Short-term patent (File no.: 32020015338.7)
Hong Kong Productivity Council (HKPC)

The Hong Kong Productivity Council (HKPC) is a multi-disciplinary organisation established by statute in 1967, to promote productivity excellence through integrated advanced technologies and innovative service offerings to support Hong Kong enterprises. HKPC is the champion and expert in facilitating Hong Kong's new industrialisation empowered by i4.0 and e4.0 - focusing on R&D, IoT, big data analytics, AI and Robotic technology development, digital manufacturing, etc., to help enterprises and industries upgrade their business performance, lower operating costs, increase productivity and enhance competitiveness. 

The Council is a trusted partner with comprehensive innovative solutions for Hong Kong industries and enterprises, enabling them to achieve resources and productivity utilisation, effectiveness and cost reduction, and enhanced competitiveness in both local and international marketplace. It offers SMEs and startups immediate and timely assistance in coping with the ever-changing business environment, accompanying them on their innovation and transformation journey.