Title: Physicochemical treatment of industrial wastewater using Moringa peregrina as a coagulant for flocculation: a comparative study

Authors: Muhammad Saleem

Addresses: Department of Civil Engineering, Jubail University College, Jubail Industrial City 31961, Saudi Arabia

Abstract: Optimum conditions for applying M. peregrina as a natural coagulant to treat pharmaceutical wastewater are determined and compared with that of alum coagulation. In both cases, coagulation, flocculation, sedimentation, was followed by slow sand filtration and activated carbon adsorption treatment. Alum reduced COD, BOD5, TSS and turbidity by 48.6%, 34.8%, 79.6%, and 69.2% respectively. Alum coagulation followed by slow sand filtration reduces the studied parameters by 97.7%, 95.7%, 93.9% and 76.9% respectively. Activated carbon was used to further reduce these parameters to 99.9%, 99.1%, 94.3% and 81.3% respectively. While using M. peregrina excellent reduction in studied parameters was found as 81.7%, 83.2%, 78.6% and 94.2% respectively. Further physicochemical treatment reduced by 99.8%, 99.7%, 99.1%, and 92.3% respectively after SSF. The performance of M. peregrina found to be superior to that of alum coagulation and can bring wastewater quality up to the standard allowable limits for reuse.

Keywords: physicochemical treatment; industrial wastewater; M. peregrina; BOD₅; COD; turbidity.

DOI: 10.1504/IJEWM.2019.103100

International Journal of Environment and Waste Management, 2019 Vol.24 No.3, pp.223 - 236

Received: 12 Apr 2018
Accepted: 24 Dec 2018
Published online: 15 Oct 2019 *

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