A free nitrous acid (FNA)-based technology for reducing sludge production.

  title={A free nitrous acid (FNA)-based technology for reducing sludge production.},
  author={Qilin Wang and Liu Ye and Guangming Jiang and Zhiguo Yuan},
  journal={Water research},
  volume={47 11},
Sludge treatment and disposal is one of the major challenges for biological wastewater treatment plants and can represent up to 60% of their total operating costs. This study presents a novel strategy based on free nitrous acid (FNA or HNO2) treatment to achieve sludge reduction. Two sequencing batch reactors treating synthetic domestic wastewater were used, with one serving as an experimental reactor and the other as a control. In the experimental system, 50% of the excess sludge was exposed… CONTINUE READING
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