Application to Nitrogen Removal

2 Degradability of the Solid Substrate An important factor to be considered in use of PLA and other BDPs in the solid-phase denitrification process is their degradability, because this factor directly affects in situ denitrifying activity. Information about the biodegradability, biodegradation. 

FIGURE 30.1 Outline of the solid-phase denitrification process using biodegradable polyesters as the solid substrate. 

TABLE 30.2 Degradability of Aliphatic Polyester Pellets Under Denitrifying Conditions in Laboratory-Scale Activated Sludge Reactors Fed with Synthetic Sewage 

Aliphatic Polyester Commercial Name as Biodegradable Plastic Degradability  

Although the PHA-based denitrification process has high performance of nitrogen removal as noted above, the relatively high production cost of PHAs may still limit this technology in practical application. Boley et al. [32] estimated that a PHB-based denitrification system costs 21-37Euro/kg N03 -N, which is almost 10 times higher 

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