Polyhydroxyalkanoate Biosynthesis from Paper Mill Wastewater Treated by a Moving Bed Biofilm Reactor

Baeza, Rocío; Jarpa, Mayra; Vidal, Gladys

Polyhydroxyalkanoate Biosynthesis from Paper Mill Wastewater Treated by a Moving Bed Biofilm Reactor

2016

Baeza, Rocío | Jarpa, Mayra | Vidal, Gladys

One potential way for organic matter recovering contained in paper mill effluents can be obtaining polyhydroxyalkanoate (PHA). The aim of this work was to evaluate PHA biosynthesis from paper mill effluents by moving bed biofilm reactor (MBBR) under different operational strategies of the BOD₅/nitrogen (N)/phosphorus (P) ratio. The operational strategies were evaluated in two phases. During phase I, organic loading rates (OLRs) were increased from 0.13 to 2.99 biological oxygen demand kg BOD₅ m⁻³ day⁻¹, and in phase II, kg BOD₅ m⁻³ day⁻¹ was increased from 0.81 to 2.83. In both phases, the BOD₅/N/P ratios were 100:5:1 and 100:1:0.3. The maximum percentages of PHA-accumulating cells and organic matter removal were 85.10 and 95.60 % for phase I, both with a BOD₅/N/P ratio of 100:5:1, while in phase II, PHA biosynthesis and organic removal were 89.41 and 97.10 % with 100:1:0.3 and 100:5:1, respectively.

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