Treatment of tannery wastewater for reuse by physico-chemical processes and a membrane bioreactor

Journal of Water Reuse and Desalination

Phuoc, N. V.¹  Oldenburg, M.²  Fettig, J.²  Pick, V.² 

[1] Institute for Environment and Resources, National University, 142 To Hien Thanh Street, District 10, Ho Chi Minh City, Vietnam;University of Applied Sciences Ostwestfalen-Lippe, Hoexter 37671, Germany

关键词: activated carbon;    dissolved air flotation;    membrane bioreactor;    reuse;    tannery wastewater;   

DOI  :  10.2166/wrd.2016.036

学科分类：工程和技术（综合）

来源: IWA Publishing

【 摘 要 】

Treatment of wastewater from a tannery in Greater Ho Chi Minh City (Vietnam) was investigated on a pilot scale. After pre-treatment by the tannery that included batch-coagulation and sedimentation, the wastewater was treated by dissolved air flotation, a membrane bioreactor (MBR) and granular activated carbon (GAC) for polishing the MBR effluent. The average removal efficiency for organic substances in the MBR was 81% while total nitrogen could only be removed by 36%. The performance of the GAC column could be successfully predicted using adsorption parameters determined in laboratory experiments. A larger proportion of the organics in the MBR effluent was only weakly adsorbable, therefore the usable carbon capacity was limited as confirmed by the modelling approach. The results were used to outline the size of a technical plant with a volumetric loading rate of 3 kg COD/(m3*d) for the MBR and a specific carbon demand of about 1.8 kg/m3.

【 授权许可】

CC BY-NC-ND