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Table 6 The most appropriate observed optimum condition for promotion of biodegradability

From: Improved biodegradability of hardly-decomposable wastewaters from petrochemical industry through photo-Fenton method and determination of optimum operational conditions by response surface methodology

Inlet COD (mg L−1) H2O2 (mg L−1) Fe2+ (mg L−1) TDS (mg L−1) Outlet COD (mg L−1) Outlet BOD5 (mg L−1) BOD5/COD (ratio)
1000.04 2668.09 1655.44 5287.44 939 582 0.6