Publications by authors named "Bianxia Liu"

Source separation sanitation systems have attracted more and more attention recently. However, separate urine collection and treatment could induce odor issues, especially in large scale application. In order to avoid such issues, it is necessary to monitor the odor related compounds that might be generated during urine storage.

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Article Synopsis
  • Struvite precipitation is a method used to recover nutrients from urine, but it requires additional magnesium as natural sources are limited.
  • Both seawater and desalination brine can effectively provide magnesium to induce struvite formation for phosphorus recovery from urine.
  • The study found that the shape of struvite crystals varied based on the source of urine used, and the purity of struvite was influenced by the magnesium to calcium ratio in the sources.
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The use of multiple calibration sets in partial least squares (PLS) regression was proposed to improve the quantitative determination of NH(3) over wide concentration ranges from open-path Fourier transform infrared (OP/FT-IR) spectra. The spectra were measured near animal farms, where the path-integrated concentration of NH(3) can fluctuate from nearly zero to as high as approximately 1000 ppm-m. PLS regression with a single calibration set did not cover such a large concentration range effectively, and the quantitative accuracy was degraded due to the nonlinear relationship between concentration and absorbance for spectra measured at low resolution (1 cm(-1) and poorer.

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