Browse all Channels
IWA Publishing
Alliance House, 12 Caxton Street ,
London ,
United Kingdom SW1H 0QS
United Kingdom
  4. Isolation of high-salinity-tolerant bacterial strains, ...

Isolation of high-salinity-tolerant bacterial strains, Enterobacter sp., Serratia sp., Yersinia sp., for nitrification and aerobic denitrification under cyanogenic conditions

0

Courtesy of IWA Publishing

Cyanides (CN−) and soluble salts could potentially inhibit biological processes in wastewater treatment plants (WWTPs), such as nitrification and denitrification. Cyanide in wastewater can alter metabolic functions of microbial populations in WWTPs, thus significantly inhibiting nitrifier and denitrifier metabolic processes, rendering the water treatment processes ineffective. In this study, bacterial isolates that are tolerant to high salinity conditions, which are capable of nitrification and aerobic denitrification under cyanogenic conditions, were isolated from a poultry slaughterhouse effluent. Three of the bacterial isolates were found to be able to oxidise NH4-N in the presence of 65.91 mg/L of free cyanide (CN−) under saline conditions, i.e. 4.5% (w/v) NaCl. The isolates I, H and G, were identified as Enterobacter sp., Yersinia sp. and Serratia sp., respectively. Results showed that 81% (I), 71% (G) and 75% (H) of 400 mg/L NH4-N was biodegraded (nitrification) within 72 h, with the rates of biodegradation being suitably described by first order reactions, with rate constants being: 4.19 h−1 (I), 4.21 h−1 (H) and 3.79 h−1 (G), respectively, with correlation coefficients ranging between 0.82 and 0.89. Chemical oxygen demand (COD) removal rates were 38% (I), 42% (H) and 48% (G), over a period of 168 h with COD reduction being highest at near neutral pH.

Related articles

  • AVEDØRE (Denmark) Municipal WWTP - Case Study

    Number of Tanks: 4Total Volume: 80,000 m³Water Depth: 3.5 mSOTR Standard Oxygen Transfer Rate: 4,270 kgO2/hTotal Airflow: 58,720 Nm3/hNo. of AEROSTRIP® Diffusers: 1,600Avedøre is part of the suburbs in the south-west of Denmark’s capital Copenhagen.The Avedøre WWTP was built on reclamation ground in 1968 and treats sewage water from a catchment area of approx. 86km² resp. 270,000 P.E.In 2015 the plant switched from surface aerators to high efficient AEROSTRIP® diffusers.From...

  • Ruzomberok (Slovakia) Industrial WWTP - Case Study

    Number of Tanks: 4Total Volume: 10,000 m³Water Depth: 4.0 mSOTR Standard Oxygen Transfer Rate: 5,095 kgO2/hTotal Airflow: 61,680 Nm3/hNo. of AEROSTRIP® Diffusers: 3,000Ružomberok is a city in northern Slovakia with around 30,000 inhabitants.The local WWTP is built for 600,000 P.E. (BOD load; 700,000 P.E. hydr.). More than 95% of organic load comes from the local paper mill (Mondi SCP, a.s.).Ružomberok WWTP relies on the quality of AEROSTRIP® since 1996.High Efficiency & Long Life Cycle for...

  • Sölden (Austria) Municipal WWTP - Case Study

    Number of tanks: 4Total Volume: 8,448 m³Water Depth: 8.0 mSOTR Standard Oxygen Transfer Rate: 2,800 kgO2/hTotal Airflow: 20,640 Nm3/hNo. of AEROSTRIP® Diffusers: 880Sölden, one of the famous ski resorts in the world, is situated in the Austrian Alps. A tourist hotspot during the wintertime, but a small mountain village in the off season.Since 2004 AEROSTRIP® diffusers have been providing the right amount of oxygen all the year round.Uncommon wide operation range – surpassed guarantee...

  • LINZ - ASTEN (Austria) Municipal WWTP - Case Study

    Number of Tanks: 8Total Volume: 92,000 m³Water Depth: 7.4 mSOTR Standard Oxygen Transfer Rate: 9,740 kgO2/hTotal Airflow: 73,600 Nm3/hNo. of AEROSTRIP® Diffusers: 3.328Linz is the capital of Austrian federal state “Upper Austria” and third-largest city of Austria. It operates the second largest municipal WWTP of the country.In the year 2001 WWTP Linz-Asten has been equipped with AEROSTRIP fine bubble diffusers.14 years operation – constant high performanceAfter 14 years of...

  • Central Kitsap (USA) Municipal WWTP - Case Study

    Number of Tanks: 4Total Volume: 13,080 m³Water Depth: 4.75 mSOTR Standard Oxygen Transfer Rate: 1,240 kgO2/hTotal Airflow: 10,800 Nm3/hTotal AEROSTRIP® Diffusers: 1,214The Central Kitsap facility started operations in 1979 as a conventional activated sludge secondary treatment plant.The plant receives wastewater from the cities of Silverdale, Keyport and Poulsbo, the Central Kitsap area, the Naval Submarine Base Bangor and the Naval Undersea Warfare Engineering Station (NUWC) at Keyport.AEROSTRIP - SSOTE...

Customer comments

No comments were found for Isolation of high-salinity-tolerant bacterial strains, Enterobacter sp., Serratia sp., Yersinia sp., for nitrification and aerobic denitrification under cyanogenic conditions. Be the first to comment!