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Study on the Optimization of Combined O3/H2O2 Process for the Treatment of Middle-stage Pulping Wastewater by Response Surface Methodology
Received:August 20, 2022  
DOI：10.11980/j.issn.0254-508X.2023.07.008
Key Words:O3  H2O2  advanced oxidation treatment  response surface  middle-stage pulping wastewater
Author NameAffiliationPostcode
GUO Yixuan State Key Lab of Pulp and Paper Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640 510640
LIU Mingyou* State Key Lab of Pulp and Paper Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640 510640
LI Jingsong Mudanjiang Hengfeng Paper Co.， Ltd.， Mudanjiang， Heilongjiang Province， 157013 157013
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Abstract:In this study， in order to improve the COD removal rate of ozone （O3） oxidation treatment of middle-stage pulping wastewater， a combined O3/H2O2 process was used for advanced oxidation treatment of middle-stage pulping wastewater from a paper mill in Guangxi. The effects of the initial pH value， O3 dosage， H2O2 dosage， reaction time， and stirring speed on the removal of colority and COD were investigated. To improve the accuracy of the optimal process parameters， the combined O3/H2O2 process parameters were analyzed by response surface optimization method. The results showed that under the process conditions of inital pH value=8， H2O2 dosage 1.0 mL/L， and O3 dosage 480 mg/L， the wastewater colority was 85.7 with removal rate of 99.3% and CODCr reached 208.2 mg/L with removal rate of 84.5%.
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