Browse all Channels
IWA Publishing
Alliance House, 12 Caxton Street ,
London ,
United Kingdom SW1H 0QS
United Kingdom
  1. Companies
  2. IWA Publishing
  3. Articles
  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

  • H-beam pile extractor manufacturer

    What is the type of H-beam steel pile? H-beam steel pile is along the retaining position pre-into the rail, I-beam or H-beam, spacing 1.0 ~ 1.5m, and then drilling, while the 3 ~ 6cm thick plate into the steel Between the retaining baffle, between the horizontal baffle and the steel into the wedge, so that the horizontal plate in close contact with the soil. H-beam Steel piles are mainly used for municipal construction, pipeline laying, tunnel engineering,sewage treatment, support construction, H-beam can be...

  • Spain - Copper’ recovery from plastic, 3000 kg/h input - Case Study

    Customer: Josè JarenoCountry: SpainMachinery: LINEDouble Guidetti line composed by 2 refiners Turbo625/4 and 2 separators Robi151, with production up to 1200 kg/h, to totally recover all the copper present in the plastic waste after cables’ recycling processes.Indicated for all working plants of the competition with a high loss of copper into plastic.Installed beginning 2017.

  • Emission of hydrogen sulfide (H2S) at a waterfall in a sewer: study of main factors affecting H2S ...

    Hydrogen sulfide (H2S) represents one of the main odorant gases emitted from sewer networks. A mathematical model can be a fast and low-cost tool for estimating its emission. This study investigates two approaches to modeling H2S gas transfer at a waterfall in a discharge manhole. The first approach is based on an adaptation of oxygen models for H2S emission at a waterfall and the second consists of a new model. An experimental set-up and a statistical data analysis allowed the main factors affecting H2S emission...

  • Matrix interference reduction for the analysis of carbohydrate in wastewater using H-point standard ...

    Soluble microbial products, consisting of protein, carbohydrate and humics, are generally considered as the main membrane foulants during the performance of membrane bioreactors. Nitrate and nitrite have been proved to affect the determination of carbohydrate when anthrone-sulfuric acid photometric method is used. In this study, three chemical analytical methods based on photometric assay, including the standard curve method, conventional standard addition method and H-point standard addition method, were...

  • How Much Do Microfiltration and Ultrafiltration Membrane Systems Cost?

    Microfiltration and ultrafiltration (MF/UF) membrane systems are used in a variety of processes and applications. They can help facilities treat boiler feed water, separate out contaminated waste to acceptable effluent standards, and manufacture safe food and/or beverages, to name a few. If your facility might require MF/UF membrane system technology, you are likely wondering, “How much do microfiltration and ultrafiltration membrane systems cost?” Since MF/UF membrane systems solve a wide variety...

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!