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Pilot Study of Catalyzed Ozonation for Treatments of Secondary Effluents and Reverse Osmosis Concentrate of Pulp and Paper Mill Wastewater
Received:March 02, 2020  
DOI：10.11980/j.issn.0254-508X.2020.06.003
Key Words:pulp and paper mill wastewater  catalytic ozonation  reverse osmosis concentrate  secondary effluent
Author NameAffiliationPostcode
HE Can School of Chemical and Environmental Engineering， China University of Mining and Technology （Beijing）, Beijing， 100083 100083
HUANG Qi CSD Water Service Co., Ltd.， Beijing， 100192)
（*corresponding author: ） 		100192
WANG Jianbing School of Chemical and Environmental Engineering， China University of Mining and Technology （Beijing）, Beijing， 100083 100083
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Abstract:The catalytic ozonation technology was used for the treatment of secondary effluent and reverse osmosis concentrate of pulp and paper mill wastewater, respectively. The influences of ozone dosage and reaction time on CODCr removal rate were investigated. The optimal operating parameters were determined. The CODCr removal rate was above 70% with the ozone dosage of 75 mg/（L·h） and reaction time of 120 min for the treatment of reverse osmosis concentrate. The CODCr removal rate was above 60% with the ozone dosage of 100 mg/(L·h) and reaction time of 90 min for advanced treatment of pulp and paper mill wastewater, and the CODCr value of the effluent from the pilot-scale system was below 30 mg/L, which could steadily meet the emission limit requirements for key control areas in the Discharge Standard of Pollutants in the Daqing River Basin (DB 13/2795—2018 Hebei province). Pilot test result showed that catalytic ozonation was a promising environmental-friendly technology in the pulp and paper mill wastewater treatment.
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