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Sivakumar, R.
- Comparative Study of Performance Evaluation of UASB Reactor for Treating Synthetic Dairy Effluent at Psychrophilic and Mesophilic Temperatures
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Authors
R. Sivakumar
1,
V. Sekaran
2
Affiliations
1 Department of Civil Engineering, As-Salam College of Engineering & Technology, Thirumangalakudi, Tamilnadu, IN
2 Pavai Engineering College, Namakkal, Tamilnadu, IN
1 Department of Civil Engineering, As-Salam College of Engineering & Technology, Thirumangalakudi, Tamilnadu, IN
2 Pavai Engineering College, Namakkal, Tamilnadu, IN
Source
Nature Environment and Pollution Technology, Vol 14, No 3 (2015), Pagination: 679-684Abstract
Dairy industry contributes to the pollution of the environment, both in quality and quantity. It generates about 0.2 to 10 L of effluent per liter of milk processed. Up-flow anaerobic sludge blanket is most suitable for biodegradable wastes, hence the present study evaluated the performance of UASBR through a laboratory model (25 liters of volume) for treating the dairy effluent with maintained psychrophilic temperature (15-20°C) at phase I and mesophilic temperature (30-40°C) at phase II. This model was studied for its treatment efficiency in terms of COD reduction. In the phase I, the average varying influent COD applied over the model are 1684, 2693, 3160, 3637, and 4059 mg/L with flow rates for each average influent COD as 4.80, 9.60, 14.40, 19.20 and 24.00 L/d. It was found that, successful COD removal of 91.42% was for the operating conditions of OLR at 0.039 kg COD/kg VSS day, VLR at 0.70 kg COD/m3 day and HRT at 5.21 days. In the phase II the average varying influent COD of 2316, 2827, 3329, 3908 and 4522 mg/L were applied with same flow rates. The experimental work on UASBR model was found successful with 94.70% COD removal under the operating conditions of OLR at 0.037 kg COD/kg VSS day, VLR at 0.630 kg COD/m3 day and HRT at 5.21 days. The reactor achieved BOD, TSS, TDS, N and P removal efficiency, observed in phase I and II, as 91%, 82%, 89%, 42% and 46% and 96.4%, 86%, 91%, 41% and 50% respectively.Keywords
UASB Reactor, Dairy Wastewater, Anaerobic Treatment, COD Removal.Full Text
- Effect of Salinity and Alleviating Role of PGRs and Nutrients for Improving the Morphological Traits of Tomato Cultivars under Salinity Condition
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Authors
Affiliations
1 Department of Crop Physiology, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, IN
1 Department of Crop Physiology, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, IN
Source
Nature Environment and Pollution Technology, Vol 17, No 1 (2018), Pagination: 107-110Abstract
Salinity has deleterious effects on many crops, especially in morphology of the plants. A research was conducted to study the effect of salinity on tomato genotypes (PKM 1 and TNAU THCO 3) and alleviation by using plant growth regulators (PGRs) and nutrients in the Department of Crop Physiology, TNAU, Coimbatore. Salinity was imposed by using NaCl at 100 mM concentration. The responses of two tomato genotypes under salinity were studied. Among two genotypes, PKM 1 was affected more by salinity than TNAU THCO 3. Foliar application of plant growth regulators like brassinolide (0.5 ppm), salicylic acid (100 ppm), benzyl amino purine (50 ppm), ascorbic acid (100 ppm), glutathione (50 ppm), KNO3 (0.5%) + FeSO4 (0.3%) + Borax (0.2%) and nutrient PGR concoction (K2SO4 (0.5%) + CaSO4 (0.5%) + Borax (0.2%) + NAA (20 ppm) were carried out at 20 and 40 DAT. Significant variations and adaptability among stressed and non-stressed plants were observed in both the genotypes. The study revealed that, among the treatments, brassinolide showed the premier observations like plant height (73.40 cm), ischolar_main length (18.60 cm), ischolar_main volume (133.25 cc), leaf area (1275.54 cm2) and total dry matter production (TDMP) (88.42 g plant-1) followed by salicylic acid when compared to control. Among the two genotypes used in this study, TNAU THCO 3 responded better for the application plant growth regulators and nutrients than PKM 1 under salinity.Keywords
Tomato Cultivars, Salinity, Plant Growth Regulators, Plant Height, Root Length, Leaf Area, Total Dry Matter Prodution.Full Text
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