MAKLUMAT PENULISAN PENYELIDIKAN
   
  Judul / Tajuk : Biokinetic coefficients for bio-treatment of actual textile wastewater with co-substrate addition using sequential facultative anaerobic-aerobic bioreactor  
  Tahun : 2018  
  Bidang : SAINS, TEKNOLOGI DAN MATEMATIK  
  Bibliografi : Daud,Z., Ibrahim, Z., Yahya, A., Aris, A. and Ari, Z. (2018). Biokinetic coefficients for bio-treatment of actual textile wastewater with co-substrate addition using sequential facultative anaerobic-aerobic bioreactor. Front Page, The 8th International Conference on Key Engineering Materials 16-18th March 2018. ICKEM 2018, University of the Ryukyus and Kyushu Branch of the Society of Materials Science, Japan. Osaka International Convention Centre. Osaka, Japan.  
  Abstrak / Sinopsis : The design of bio-treatment system should consider the kinetic approach due to the wide variation of wastewater composition and the complexity of biochemical reactions rather than just based on hydraulic parameters. Thus, the study aims to determine the biokinetic coefficients for three treatments of actual textile wastewater with yeast extract (YE) addition, riboflavin addition and absence of co-substrate. In this study, the sequential facultative anaerobic-aerobic bioreactor was operated continuously for 190 days by HRT about 72 hrs. The Monod model was used to evaluate co-substrate utilization. The result found that the decay rate constant (kd), half velocity constant (Ks), maximum specific growth rate (µm), specific biomass growth rate (µ), doubling time (td) and yield coefficient (Y) were impacted by different co-substrate. Under anaerobic condition, µm (0.3151 d-1), µ (0.2609d-1), Ks (42.5 mg COD/L) and Y (0.396 mg MLSS/mg COD) by YE+riboflavin addition was lower than other treatments. The same result was found by YE+ribofalvin addition compared to other treatments under aerobic condition. In this study, td by absence co-substrate showed lower than other treatments under both conditions while kd by YE+riboflavin addition under aerobic and YE under anaerobic showed lower than others. The results also showed a COD removal efficiency for YE+ribofalvin addition ranging between 75 and 88% (average: 82±4%) was the best, followed by yeast extract addition between 65 and 89% (average: 80±6%) and absence of co-substrate between 70 and 86% (average: 78±5%). The best COD removal efficiency by YE+ribofalvin addition may indicates that its biokinetic coefficients are useful for designing a more efficient bio-treatment system in treating actual textile wastewater.