文献类型：期刊文献

英文题名：Ozone/biological aerated filter integrated process for recycled paper mill wastewater: A pilot-scale study

作者：Ding, Laibao[1,2,3,4,5] Tian, Qingwen[1,2,3,4,5,6,7] Yang, Ran[1,2,3,4,5] Zhu, Jinwei[1,2,3,4,5] Guo, Qi[1,2,3,4,5] Fang, Guigan[1,2,3,4,5,6,7]

第一作者：Ding, Laibao;丁来保

通信作者：Tian, QW[1];Tian, QW[2];Tian, QW[3];Tian, QW[4];Tian, QW[5]

机构：[1]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Nanjing 210042, Peoples R China;[2]Key Lab Biomass Energy & Mat, Nanjing 210042, Jiangsu, Peoples R China;[3]Coinnovat Ctr Efficient Proc & Utilizat Forest Res, Nanjing 210042, Jiangsu, Peoples R China;[4]Natl Forestry & Grassland Adm, Key Lab Chem Engn Forest Prod, Nanjing 210042, Peoples R China;[5]Natl Engn Lab Biomass Chem Utilizat, Nanjing 210042, Peoples R China;[6]Shandong Huatai Paper Co Ltd, Dongying 257335, Peoples R China;[7]Shandong Yellow Triangle Biotechnol Ind Res Inst C, Dongying 257335, Peoples R China

年份：2024

卷号：211

外文期刊名：BIOCHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20243416922444);Scopus(收录号：2-s2.0-85201704296);WOS:【SCI-EXPANDED(收录号:WOS:001300091300001)】；

基金：The study was supported by Jiangsu Key Laboratory for Biomass Energy and Material (JSBEM-S-202207, Shandong Postdoctoral Science Foundation (SDCX-ZG-202400110) and the Fundamental Research Funds of Research Institute of CAF (CAFYBB2020GC016) .

语种：英文

外文关键词：Ozone; Biological aerated filter; Recycled paper effluent; Decolorization

摘要：In this study, the effluent from recycled paper mill was treated using a combined ozone (O3) and biological aerated filter (BAF) process. Key operational parameters such as ozone dosage, pH, hydraulic retention time (HRT), volume load and gas-to-water ratio were optimized. Under optimal conditions, with a total ozone dosage of 100 g/m, a gas-to-water ratio of 4:1, and an HRT of 3.0 hours in the BAF, the chemical oxygen demand (COD) and chroma of the treated wastewater were reduced to 44-55 mg/L and 2-4 PCU, achieving removal efficiencies of 70 % and 95 %, respectively. The discharge effluent not only satisfy the new discharge standard of China (GB3544-2008), but also can be used as recycling water. Additionally, the treatment cost of wastewater was ca. 1.3 & YEN;/m3 in pilot-scale test, significantly decreasing the cost. Ozone pretreatment has a significant effect on wastewater decolorization by disrupting the molecular chemical structure of pollutants, which increase the biochemical properties of biofilm and is beneficial to the sequential BAF treatment. The sludge in the O3/BAF system exhibited increased biomass with minimal filamentous bacteria and higher dehydrogenase activity, confirming stable and robust bacterial growth. GC-MS analysis revealed substantial reduction in pollutant content and diversity post-treatment, although the recalcitrant compound (Z)-13-docosenamide remained relatively high, decreasing from 27.37 % to 21.14 %. The mechanism of the O3/BAF process for the pollutant degradation were also proposed. This study demonstrated that a combination of ozone and fixed biofilm treatment is an efficient and cost-effective treatment, providing the theory and practical applicability for the industrial wastewater.