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Wastewater phytoremediation by Salvinia molesta

Wastewater phytoremediation by Salvinia molesta / Ng Yin Sim
Dalam sistem rawatan semula jadi biologi, tumbuhan aquatik terapung telah digunakan di dalam kolam kematangan pada tahun-tahun terdekat ini untuk menaiktarafkan efluen dari kolam penstabilan. Sistem tumbuhan aquatik berupaya mencapai kualiti efluen rawatan sekunder daripada efluen kumbahan utama. Dalam kajian ini, prestasi fitoremediasi oleh tumbuhan aquatik Salvinia molesta pada kumbahan kilang kelapa sawit (POME) rawatan utama disiasat. Objektif kajian ini adalah untuk menyukat pengambilan nutrien nitrat, fosfat dan ammonia oleh S. molesta daripada POME rawatan utama dan kesannya terhadap biomas dan kandungan biokimia. Kualiti air selepas fitoremediasi dari segi COD, kekeruhan dan MLVSS juga dikaji. Fitoremediasi air sisa oleh S.molesta ini telah dijalankan di luar selama 16 hari di dalam raceway pond rig. Sampel air diambil setiap hari untuk menyukat pengambilan nutrien S. molesta dan kualiti airnya. Hasil kajian menunjukkan bahawa S. molesta mencapai 95 % kecekapan dalam menyingkirkan fosfat daripada air kumbahan, kepekatan menurun dari 3.25 mg/l ke 0.17 mg/l. Kepekatan nitrat ditetapkan pada 0.50 mg/l di akhir experimen. Kepekatan ammonia menunjukkan trend turun naik yang dinamik dengan nilai purata 2.62 mg/l, turun naik dalam lingkungan 1.58-3.90 mg/l. Bagi penilaian kualiti air, kekeruhan berkurangan dari 7.56 NTU ke 0.94 NTU dalam masa hanya 2 hari. Analisis MLVSS adalah jauh rendah pada eksperimen hari kedua. Kedua-dua keputusan adalah disebabkan keupayaan akar S. molesta sebagai tapak penjerapan untuk pepejal terampai organik. 39 % kecekapan penyingkiran COD dicatatkan. S. molesta yang ditanam di dalam raceway pond rig memberikan peningkatan biojisim sebanyak 79 % pada hari ke-16 eksperimen. Jumlah kandungan karbohidrat meningkat ke 0.315g/g biomas dengan kenaikan 26 % manakala jumlah kandungan protein meningkat dari 0.258g/g biomas ke 0.270g/g biomas. Kajian ini menunjukkan bahawa S. molesta mempunyai potensi untuk digunakan dalam fitoremediasi pada POME rawatan utama dan menunjukkan komposisi biokimia yang unggul. _______________________________________________________________________________________________________ In natural biological treatment systems, floating macrophytes have been used in maturation pond in recent years to upgrade effluents from stabilization ponds. The macrophytes systems are able to achieve secondary treatment effluent quality from primary sewage effluent. In this study, the performance of phytoremediation by Salvinia molesta macrophytes on primary treated Palm Oil Mill Effluent (POME) is investigated. The objectives of the study are to determine the nutrient uptake of nitrate, phosphate and ammonia by S. molesta from primary treated POME and its effect towards the biomass and biochemical content. Water quality after phytoremediation in term of COD, turbidity and MLVSS are also studied. The wastewater phytoremediation by S. molesta was conducted outdoor for 16 days in a raceway pond rig. Water samples were collected daily to determine the nutrient uptake of S. molesta and its water quality. The results showed that S. molesta achieved 95 % phosphate removal efficiency from the wastewater, lowering concentration from 3.25 mg/l to 0.17 mg/l. Nitrate concentration were determined to be at 0.50 mg/l at the end of the experiment. Ammonia concentration showed a dynamic fluctuation trend with average value of 2.62 mg/l, fluctuating within 1.58-3.90 mg/l. For water quality assessment, turbidity decreased from 7.56 NTU to 0.94 NTU in just 2 days time. MLVSS analysis was significantly low by day 2 of experiment. Both results are due to the capability of S. molesta’s roots as adsorption site for suspended organic solids. COD removal efficiency was determined at 39 %. S. molesta cultivated in the raceway pond rig gave a biomass increment of 79 % by day 16 of experiment. Total carbohydrate content increased to 0.315g/g biomass with 26 % increment while total protein content rose from 0.258g/g biomass to 0.270g/g biomass. This study indicates that S. molesta plants have the potential to be used in the phytoremediation of primary treated POME and showed a superior biochemical composition.
Contributor(s):
Ng Yin Sim - Author
Primary Item Type:
Final Year Project
Identifiers:
Accession Number : 875005373
Language:
English
Subject Keywords:
natural; biological; treatment;
First presented to the public:
6/1/2014
Original Publication Date:
8/18/2020
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Chemical Engineering
Citation:
Extents:
Number of Pages - 82
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2020-08-18 12:25:47.829
Submitter:
Mohd Jasnizam Mohd Salleh

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