Treatment of centrifugal mother liquid of polyvinyl chloride by internal circulation aerobic biofilm reactor: Lab to plant scale system

• Type: Article in International Scientific Journal
• Date: 2018

Authors

S. Tabassum (Author) Other; Qinhong Ji (Author) Other; Chunjie Li (Author) Other; Lina Chi (Author) Other; Claúdia G. Silva (Author) FEUP; Amin F. A. Ajlouni (Author) Other; Chunfeng Chu (Author) Other; Rua B. Alnoman (Author) Other; Zhenjia Zhang (Author) Other

Journal

Title: Journal of Cleaner Production

Vol. 200

Pages: 568-577

ISSN: 0959-6526

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 0 Citations

ISI Web of Science

Scopus - 1 Citation

INSPEC

Scientific classification

CORDIS: Technological sciences > Engineering > Chemical engineering

FOS: Engineering and technology > Chemical engineering

Associated Projects

IF/00514/2014/CP1249/CT0004 - Desafiando a síntese em química fina: uma nova abordagem utilizando fotocatalisadores isentos de metais

Other information

Authenticus ID: P-00P-E0Q

DOI: 10.1016/j.jclepro.2018.07.276

Abstract (EN): Centrifugal mother liquid (CML) is a typical poorly biodegradable organic wastewater generated during the production of polyvinyl chloride (PVC). A method of treating PVC centrifugal mother liquid by a high efficiency internal circulation aerobic biofilm reactor (four reactors lined up together) is presented in this study. The optimized technique was tested and evaluated in a lab and in a plant scale system. The effect of chemical oxygen demand (COD) removal efficiency was studied under different hydraulic retention time (HRT): 40, 20, 17,14 and 12 h, respectively. Considering the efficiency and removal rate, the best HRT was 14 h. At HRT of 14 h, the average volume loading was 0.326 kg COD/(m(3).d). During the product shift from TL-1000 to TL-800 (two kinds of PVC products with different polymerization degree), the treatment efficiency of the system was not affected. Compared with the plant scale system, the results showed that in the lab setup the removal rates of centrifugal mother liquid of TL-1000 (total organic carbon (TOC) = 70-75 mg/L) and TL-800 (TOC = 20 mg/L) were 90%-95% and 80%-90%, respectively. While in the plant scale system, the removal rates of centrifugal mother liquid of TL-1000 and TL-800 were 80%-90% and 65%-80% (effluent TOC 7.5-12 mg/L), respectively. Biofilm formation by the microbial reproduction as well as intensive filamentous bacteria settlements were observed.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10