Coagulation-Clarification of Coloured Water Using Natural Coagulant (Moringa oleifera)

• Main Author: Khairuldin, Putri Sarah Aainaa
• Format: Final Year Project
• Language: English
• Published: Universiti Teknologi Petronas 2008
• Subjects: TA Engineering (General). Civil engineering (General)
• Online Access: http://utpedia.utp.edu.my/7119/1/2008%20-%20Coagulation-clarification%20of%20coloured%20water%20using%20natural%20coagulant%20%28moringa%20ofeifera%29%20-%202.pdf; http://utpedia.utp.edu.my/7119/

This paper presents the progress achieved in the study of coagulation-clarification of coloured water using a natural coagulant (Moringa oleifera). The main objective of this project was to evaluate the efficiency of Moringa oleifera seed extract as primary coagulant and coagulant aid in treating coloured water in Malaysia. A number of jar tests with low turbidity (ca. 50 NTU) and medium-level true colour condition ( ca 50 CU) with corresponding apparent colours were carried out within the project tirneline. The model turbid water (ca. 50 NTU and 50 CU) underwent three different tests; by using aluminium sulphate as primary coagulant, Moringa oleifera seed extract as primary coagulant and Moringa oleifera seed extract coagulant aid. Moringa o/eifera seed extract reduced turbidity and colour of the river water, but it was less effective compared to aluminium sulphate. Alum (25 mgll) produced excellent clarification (filtrate turbidity: 1.72 NTU; filtrate colour: 3.0 CU), where as Moringa oleifera seed extract (500 mgll) produced acceptable clarification (filtrate turbidity: 4.24 NTU; filtrate colour: 15.0 CU). Combination of aluminium sulphate (15 mgll) and Moringa oleifera seed extract (80 mg/l) produced comparable and consistent clarification (filtrate turbidity: 3.54 NTU; filtrate colour: 13.0 CU).