Continuous bioscorodite crystallization in CSTRs for arsenic removal and disposal.

@article{GonzlezContreras2012ContinuousBC,
  title={Continuous bioscorodite crystallization in CSTRs for arsenic removal and disposal.},
  author={Paula Gonz{\'a}lez-Contreras and Jan Weijma and Cees J N Buisman},
  journal={Water research},
  year={2012},
  volume={46 18},
  pages={5883-92}
}
In CSTRs, ferrous iron was biologically oxidized followed by crystallization of scorodite (FeAsO(4)·2H(2)O) at pH 1.2 and 72 °C. The CSTRs were fed with 2.8 g L(-1) arsenate and 2.4 g L(-1) ferrous and operated at an HRT of 40 h, without seed addition or crystal recirculation. Both oxidation and crystallization were stable for periods up to 200 days. The arsenic removal efficiency was higher than 99% at feed Fe/As molar ratios between 1 and 2, resulting in effluents with 29 ± 18 mg As L(-1… CONTINUE READING