Assessment of biosorbent developed from fish scales in the treatment of wastewaters

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dc.contributor.advisorDr. P. Padmavathy
dc.contributor.advisorMrs. D. Manimekalai
dc.contributor.advisorDr. R. Jeya Shakila
dc.contributor.authorMs. S. Subhashree Devasena
dc.date.accessioned2023-05-23T05:38:53Z
dc.date.available2023-05-23T05:38:53Z
dc.date.issued2020
dc.description.abstractThe present study was conducted to assess the potential of fish scales in the treatment of shrimp farm wastewater, seafood processing plant wastewater and heavy metal spiked wastewater. Waste fish scales were collected from fish markets. Fish Scale Biosorbent (FSB) was prepared according to the standard procedure of Othman et al. (2016). Wastewater samples were collected from brackish water shrimp farm and local seafood processing plant in Thoothukudi. The initial physicochemical parameters in raw wastewaters were analysed. The treatment of wastewaters with FSB was carried out as a batch work in the laboratory. The wastewater samples (100 ml) were taken in conical flask and treated with 5 different FSB dosage levels viz., 0.0625 g, 0.125 g, 0.25 g, 0.5 g and 1 g using an Orbital shaker (250 rpm) under 3 different contact times (45, 90 and 180 minutes). The concentration of water quality parameters were compared before and after treatment. During treatment, the concentration of parameters were significantly (p<0.05) reduced with increasing FSB dosage levels and contact times. The FSB treatment showed good percentage reduction (%R) of all the physicochemical parameters. During treatment, 36 – 37 %R in pH was observed in both wastewaters. The FSB treatment reduced 53 - 55 % of alkalinity in both wastewaters with initial value ranging between 206 and 602.33 mg/l. The mean initial concentration of ammonia observed in raw wastewaters was between 60.13 and 186.25 μg NH3-N/l. After FSB treatment, more than 95% reduction in ammonia concentration was observed in both wastewaters. Among nutrients, FSB exhibited good adsorption towards phosphate (77.34 – 36.36 %R), followed by nitrite (59.95 – 75.5 %R) and nitrate (24.78 – 52.71 %R) in both wastewaters. The nutrients were highly treated in seafood processing plant wastewater than shrimp farm wastewater. In shrimp farm wastewater, the FSB treatment showed 52.40%, 38.60% and 66.11% of reduction in TDS, TSS and TS concentrations. In case of seafood processing plant wastewater, the FSB treatment showed 33.72, 57.92 and 46.99 %R in TDS, TSS and TS concentrations respectively. The FSB treatment showed 74.68 – 89.95 %R of BOD in both wastewaters. The mean COD concentration observed in raw wastewaters ranged between 87.66 and 128.77 mg/l. This high COD concentration was reduced by FSB treatment with more than 90 %R in both wastewaters. In the present study, synthetic copper and lead spiked wastewaters (150 ml) were treated separately with five different FSB dosage levels viz., 0.05 g, 0.07 g, 0.1 g, 0.15 g and 0.2 g in an orbital shaker (250 rpm) at three different contact times (45, 90 and 180 minutes). The initial concentration of metal solutions was 50 mg/l. After FSB treatment, 94.9 % and 65.3 % of copper and lead was reduced. The concentration of copper and lead was significantly reduced (p<0.05) with increasing FSB dosage levels and contact times throughout the treatment. Based on the results, it can be concluded that 0.2 g/150 ml and 180 minutes was found to be the best dosage and contact time for the treatment of synthetic metal spiked wastewaters. The best FSB dosage and contact time for the treatment of ammonia and nutrients in shrimp farm and seafood processing plant wastewaters were found to be 1 g/100 ml and 90 minutes. However, for the other physicochemical parameters, it was 1 g and 180 minutes. The presence of functional groups, surface morphology and elemental composition of FSB, before and after wastewater treatment were identified by FTIR, FESEM and EDS analysis. In this study, the high concentrations of ammonia, BOD and COD observed in raw shrimp farm and seafood processing plant wastewater were reduced by FSB treatment to the standard level for effluent discharge as prescribed by Coastal Aquaculture Authority (CAA) of India. The present work assessed the adsorption ability of waste fish scales and gives an eco-friendly solution to wastewater treatment and solid waste management.en_US
dc.identifier.urihttps://krishikosh.egranth.ac.in/handle/1/5810197416
dc.language.isoEnglishen_US
dc.pages109en_US
dc.publisherFisheries College and Research Institute, Thoothukudi, Tamilnadu Dr.J.Jayalalitha Fisheries Universityen_US
dc.subFisheriesen_US
dc.themeAssessment of biosorbent developed from fish scales in the treatment of wastewatersen_US
dc.these.typeM.F.Scen_US
dc.titleAssessment of biosorbent developed from fish scales in the treatment of wastewatersen_US
dc.typeThesisen_US
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