Biodegradation of high saline petrochemical wastewater by novel isolated halotolerant bacterial strains using integrated powder activated carbon/activated sludge bioreactor. Issue 4 (29th November 2018)

• Record Type: Journal Article
• Authors: Jorfi, Sahand; Ghafari, Shokouh; Ramavandi, Bahman; Soltani, Reza Darvishi Cheshmeh; Ahmadi, Mehdi
• Is Part Of: Environmental progress & sustainable energy. Volume 38:Issue 4(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-11-29
• Subjects: integrated powder activated carbon/activated sludge bioreactor -- saline wastewater -- halotolerant bacteria -- biokinetic coefficient -- industrial wastewater treatment; Environmental engineering -- Periodicals; Sustainable engineering -- Periodicals; Environmental chemistry -- Periodicals; 333.7
• DOI: 10.1002/ep.13088
• Languages: English
• ISSNs: 1944-7442

Abstract

Abstract : The halotolerant bacteria including Pseudomonas stutzeri strain Ahv‐S12, Bacillus vietnamensis strain Ahv‐ Q1 and Brevibacterium sediminis strain Ahv‐Z20 were used as inoculums in an integrated powder activated carbon/activated sludge bioreactor. The influence of organic loading rates (OLRs) and total dissolved solids (TDS) concentrations on chemical oxygen demand (COD) removal efficiency was evaluated. Furthermore, biokinetic coefficient was evaluated under TDS variation. Results showed that the COD removal value of 68.32% was observed in OLR of 0.4 kg COD m −3 day −1 and TDS concentrations of 20, 000 mg L −1 . Higher OLR and TDS concentration led to lower COD removal efficiency. On the other hand, the biodegradation function of isolated salt tolerant strains was much more affected by salinity rather than OLR. Results of biokinetic coefficient determination showed that yield value ( Y ), k d, K, and μ max were 0.199–0.274 mgVSS mg COD −1, 0.016–0.038 day −1, 0.48–0.922 day −1 and 0.097–0.244 day −1, respectively. © 2018 American Institute of Chemical Engineers Environ Prog, 38:e13088, 2019