Pulp and paper industry is one of the most polluting industries all over the world that uses significant amount
of fresh water and produces substantial amount of solid and liquid waste. Wastewater resulting from paper industry
in Upper Egypt was treated using activated sludge process but all chemical and biological parameters were high,
thus, in the present study, activated sludge process followed by moving bed biofilm reactor were used in treating
paper industrial wastewater with special microorganisms such as Pediococcus sp., Bacillus sp. and Pichia sp. The
results showed that COD, BOD, TDS and TSS values of raw paper industrial wastewater were 2929.4 mg/L, 676
mgO
/L, 2584.5 mg/L and 1666.3 mg/L as average respectively. While COD, BOD, TDS and TSS values of final
effluent after using moving bed biofilm reactor were 36 mg/L, 27.5 mgO
2
/L, 1077.5 mg/L and 33 mg/L, respectively.
The removal efficiencies of COD, BOD, TDS and TSS using activated sludge after adding the special
microorganisms were 95.8%, 94.1%, 38.5% and 95.2%, respectively. Moving bed biofilm reactor has an impact on
removal of TSS, COD and BOD. The removal efficiency increased using this technique with special
microorganisms. The removal efficiencies of COD, BOD, TDS and TSS were 98.7%, 95.9%, 58.3% and 98%,
respectively using activated sludge process followed by moving bed biofilm reactor system with special
microorganisms. Also, coliforms removal efficiencies were 94.6% for total coliforms and 99.5% for fecal coliforms.
From this study, it can be concluded that, the final effluent was suitable for reuse in irrigation and industrial
purposes after biological treatment. Biological treatment is more economic and eco-friendly due to its low running
and maintenance cost.
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