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In this paper, an endeavour is made to study the feasibility of natural coagulants like Cicer arietinum, Dolichos lablab, Maize seeds, Moringa oleifera seeds, Okra seeds, Orange peel, Peanut seeds, Roselle seeds, Sapodilla seeds and Strychonos potatorum seeds on the reduction of phosphorous content from Industrial wastewater. The batch coagulation test was done to identify the optimum coagulant dosage, pH level at which the removal efficiency is high, mixing time and floc settling time required for the removal of phosphorous in the wastewater. A chart was plotted between the removal efficiency of all the chosen coagulants corresponding to the dosage, pH, mixing time and settling time. The removal percentage of phosphorous is more for Moringa oleifera seeds with 93%, followed by Strychonos potatorum seeds with 89% and Sapodilla seeds with 83% demonstrates the minimum phosphorous removal from the wastewater as 37%. Moringa oleifera seeds can be utilised as an effective coagulant for the removal of phosphorous from the wastewater. The maximum percentage removal efficiency of phosphorous was achieved by Moringa oleifera seeds for the coagulant dosage 5.8 mL, pH of 7, mixing time of 30 minutes, settling time of 30 minute and the final phosphorus concentration of 306.1 mg/L was achieved. Also, the corresponding values of pH, optimum coagulant dosage, mixing time and settling time for the phosphorus removal vary according to each chosen coagulants. Based on this study, a model was developed in accordance with the coagulation dosage and concentration of phosphorus. The overall regression accuracy of the Langmuir hypothesis model was identified as r2 = 0.94. [ABSTRACT FROM AUTHOR]

This study focuses on the effect of heat input on the quality characteristics of tungsten inert arc gas welded incoloy 800HT joints using inconel-82 filler wire. Butt welding was done on specimens with four different heat inputs by varying the process parameters like welding current and speed. The result indicated that higher heat input levels has led to the formation of coarser grain structure, reduced mechanical properties and sensitization issues on the weldments. The formation of titanium nitrides provided resistance to fracture and increased the tensile strength of the joints at high temperatures. Further aging was done on the welded sample at a temperature of 750°C for 500 hours and the metallographic result showed formation of carbides along the grain boundaries in a chain of discrete and globular form which increased the hardness of the material. The formation of spinel NiCr2O4 provided oxidation resistance to the material during elevated temperature service.