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Iron and manganese removal from groundwater by using limestone filter with iron-oxidizing bacteria

Iron and manganese removal from groundwater by using limestone filter with iron-oxidizing bacteria / Tommy Huang Lick Wei
Air bumi merupakan sumber penting yang dapat melengkap peningkatan permintaan untuk keperluan air bersih. Ia banyak terdapat di kebanyakan tempat, malangnya kerap hadir bersama besi dan mangan yang memerlukan proses rawatan lebih lanjut untuk memastikan kualiti air dapat diterima. Objektif utama kajian ini adalah untuk menilai prestasi rawatan air bumi dengan menggunakan penapis batu kapur dan batu kapur yang dibantu dengan bakteria pengoksidaan besi (IOB) yang terdapat di Loji Rawatan Air Kampung Chap, Kelantan. IOB telah digunakan di loji rawatan, dihidupkan pada permukaan penapis pasir. Batu kapur dengan saiz zarah 0.6-2.36 mm adalah hos alternatif kepada IOB dalam kajian ini. Batu kapur juga bertindak sebagai media penjerapan kerana kajian terdahulu menunjukkan keupayaannya dalam menyingkirkan logam berat. Sampel air bumi dari lubang jara USM dicirikan terlebih dahulu. Perbandingan prestasi rawatan dibuat berdasarkan lajur penapis pada kadar aliran 4.0 L/jam dan masa tahanan sebanyak 2.94 minit. Hasil kajian menunjukkan bahawa 2.0 jam waktu operasi adalah masa yang optimum untuk kedua-dua kaedah rawatan. Dengan masa operasi 2.0 jam, peratusan penyingkiran besi adalah 77.69% untuk penapis batu kapur sahaja dan 81.72% untuk batu kapur yang dibantu dengan IOB, manakala peratus penyingkiran mangan adalah 82.60% untuk penapis batu kapur sahaja dan 83.63% untuk kapur dibantu dengan IOB. Keseluruhannya, rawatan air bumi oleh kapur yang dibantu oleh IOB mempunyai prestasi yang lebih baik daripada penggunaan penapis kapur sahaja. Apabila masa operasi meningkat, prestasi air bawah tanah yang dirawat akan menjadi lebih baik. IOB dapat memangkinkan pengoksidaan bentuk besi (II) dan mangan (II) yang larut masing-masing kepada bentuk besi (III) dan mangan (IV) yang tidak larut. Dapat disimpulkan bahawa kehadiran IOB bermanfaat dalam meningkatkan penyingkiran besi dan mangan dalam air bumi. _______________________________________________________________________________________________________ Groundwater is an important resource that can complement the increasing demand for fresh water needs. It is abundant in many areas; unfortunately, it commonly presents with iron (Fe) and manganese (Mn) which requires further treatment process to ensure the water quality is acceptable. The main objective of this research was to evaluate the performance of the groundwater treatment using limestone filter alone and limestone assisted with iron-oxidizing bacteria (IOB) found at the Kampung Chap Water Treatment Plant, Kelantan. IOB has been used at the treatment plant, immobilized on the surface of the sand filter. Limestone with the particle size of range 0.6-2.36 mm was the host alternative to the IOB in this research. Limestone also acts as adsorption media as previous studies have indicated its capability in removing heavy metals. The groundwater sample from USM Borehole was first characterized. The comparisons of the treatment performances were made based on the filter column at a flow rate of 4.0 L/hour and retention time of 2.94 minutes. The result indicated that the 2.0 hours of operation time was the optimum running time for both treatment methods. With the 2.0 hours operation time, the percentage of Fe removal was 77.69% for limestone filter alone and 81.72% for limestone assisted with IOB, while the percentage of Mn removal was 82.60% for limestone filter alone and 83.63% for limestone assisted with IOB. Overall, the groundwater treatment by limestone assisted with IOB has better performance than the use of limestone filter alone. As the operation time increases, the performance of the treated groundwater is better. The IOB can catalyze the oxidation of soluble form of Fe (II) and Mn (II) to the insoluble form of Fe (III) and Mn (IV) respectively. It can be concluded that the presence of IOB is beneficial in improving the removal of Fe and Mn in the groundwater.
Contributor(s):
Tommy Huang Lick Wei - Author
Primary Item Type:
Final Year Project
Identifiers:
Accession Number : 875008348
Language:
English
Subject Keywords:
Groundwater; iron; manganese
First presented to the public:
6/1/2019
Original Publication Date:
10/1/2019
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Civil Engineering
Citation:
Extents:
Number of Pages - 125
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2019-10-01 15:51:41.079
Submitter:
Mohd Jasnizam Mohd Salleh

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Iron and manganese removal from groundwater by using limestone filter with iron-oxidizing bacteria1 2019-10-01 15:51:41.079