scholarly journals Optimization of Suitable Eco-Friendly Technology for Bioremediation of Textile Wastewaters

2019 ◽  
Vol 8 (11) ◽  
pp. 3482-3486
Keyword(s):  
Waste Water ◽  
Scenedesmus Obliquus ◽  
Sewage Treatment ◽  
Chlorella Pyrenoidosa ◽  
Biofuel Production ◽  
Human Beings ◽  
Effective Removal ◽  
Clean Environment ◽  
New Treatment ◽  
Textile Wastewaters

Water is one of the major products of nature used enormously by human beings and it is not unnatural that any growing community generates enormous waste water or sewage. As a clean environment is a prerequisite for a healthy living in any urban settlement, proper treatment and safe disposal of sewage call for prime attention. Untreated waste water can cause pollution of surface and ground waters. Many new developments in the field of sewage treatment are eventually taking place. These developments include improvements for more effective removal of pollutants and new treatment processes capable of removing pollutants not ordinarily removed by conventional methods. Three types of textile wastewaters (Acid Yellow dye, Acid orange dye and Basic pink dye) has been used for wastewater treatment and microalgal (Chlorella pyrenoidosa and Scenedesmus obliquus) biofuel production. Nitrogen content in textile wastewaters is very less, hence urea is used as nitrogen source in wastewater. Discharge of untreated domestic and industrial wastewater into aquatic bodies is posing a serious eutrophication threat, leading to a slow degradation of the water resources. A number of physical, chemical and biological methods have been developed for the treatment of wastewaters; among these, the use of microalgae is considered as a more eco-friendly and economical approaches.

scholarly journals Development of Sustainable Phycoremediation With the Help of Chlorella Pyrenoidosa for Textile Wastewater Analysis Using Response Surface Methodology

2020 ◽  
Author(s):  
Shubhangi Mishra ◽  
Pradeep Kumar Srivast ◽  
Virendra Singh ◽  
Monika Sharma
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Biomass Productivity ◽  
Textile Wastewater ◽  
Optimal Growth ◽  
Chlorella Pyrenoidosa ◽  
Biofuel Production ◽  
Aquatic Life ◽  
Chlorella Sp ◽  
Textile Wastewaters

Abstract The uncontrolled utilization for the textile products is increasing year by year resulting with the elevating wastewater generated from the textile industries, which makes it among the prevalent sources of critical environmental deteoration issue globally. Products obtained from the dyes used are the primary toxic product for aquatic life, they cause aesthetic pollution, eutrophication, perturbation and increase in BOD and COD in aquatic life. Three types of textile wastewaters (Acid Yellow dye, Acid orange dye and Basic pink dye) has been used for wastewater treatment and microalgal (Chlorella pyrenoidosa) biomass production. Nitrogen content in textile wastewaters is very less, hence urea is used as nitrogen source in wastewater. Optimal growth condition (Urea-0.4g/L, wastewater- 40%(v/v)) is developed through Response surface methodology (RSM). The biomass productivity for chlorella sp. is 1.2-1.5 g/L/day in textile wastewaters. The reduction efficiency of COD, Nitrate-N Ammonia-N, Phosphate-P, and Dye(color) removal for Chlorella is 90-95%, 75-85%, 90-98%, 65-74% and 40-65%.After harvesting the Biomass by flocculation method it can be used for biofuel production by in-situ transesterification.

scholarly journals Development of Sustainable Phycoremediation with the help of Chlorella Pyrenoidosa for Textile Wastewater Analysis using Response Surface Methodology

2020 ◽  
Author(s):  
Shubhangi Mishra ◽  
Pradeep Srivast ◽  
Virendra Singh ◽  
Monika Sharma
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Biomass Productivity ◽  
Textile Wastewater ◽  
Optimal Growth ◽  
Chlorella Pyrenoidosa ◽  
Biofuel Production ◽  
Aquatic Life ◽  
Chlorella Sp ◽  
Textile Wastewaters

Abstract The uncontrolled utilization for the textile products is increasing year by year resulting with the elevating wastewater generated from the textile industries, which makes it among the prevalent sources of critical environmental deteoration issue globally. Products obtained from the dyes used are the primary toxic product for aquatic life, they cause aesthetic pollution, eutrophication, perturbation and increase in BOD and COD in aquatic life. Three types of textile wastewaters (Acid Yellow dye, Acid orange dye and Basic pink dye) has been used for wastewater treatment and microalgal (Chlorella pyrenoidosa) biomass production. Nitrogen content in textile wastewaters is very less, hence urea is used as nitrogen source in wastewater. Optimal growth condition (Urea-0.4g/L, wastewater- 40%(v/v)) is developed through Response surface methodology (RSM). The biomass productivity for chlorella sp. is 1.2-1.5 g/L/day in textile wastewaters. The reduction efficiency of COD, Nitrate-N Ammonia-N, Phosphate-P, and Dye(color) removal for Chlorella is 90-95%, 75-85%, 90-98%, 65-74% and 40-65%.After harvesting the Biomass by flocculation method it can be further used for biofuel production by in-situ transesterification.

Sewage Treatment in Helophyte Beds–First Experiences with a New Treatment Procedure

1987 ◽  
Vol 19 (10) ◽  
pp. 1-10 ◽  
Author(s):  
K. Bucksteeg
Keyword(s):  
Waste Water ◽  
Rural Areas ◽  
Root Zone ◽  
Waste Water Treatment ◽  
Sewage Treatment ◽  
Uptake Capacity ◽  
Humid Climate ◽  
Climate Conditions ◽  
Trickling Filters ◽  
Operation Conditions

Waste water treatment in helophyte beds under humid climate conditions has been favoured by some German ecologists for some years. The idea is to cause waste water to flow horizontally through the root zone of helophytes to achieve satisfactory effluent properties. There exist many highly different proposals regarding the choice of soil and helophytes to be applied, bed area, design of inlets and outlets and operation conditions. A few plants have been operated in practice for some years. It appears that clogging is one of the main problems occurring in these plants. The hydraulic uptake capacity of soil is discussed in Darcy's law. Comparisons with observations of plants in operation are drawn. The interactions between soil properties, its uptake capacity, BOD5-, COD-, N- and P-reduction are evaluated. The effluent results of helophyte beds are compared with those of low-loaded trickling filters and of ponds used for sewage treatment in small villages in rural areas of Germany. It has been proved that the total construction costs of sewage treatment plants with helophyte beds used as the biological stage are higher when compared with those of conventional plants in general.

A Study of the Behaviour of a Single-Bladed Waste-Water Pump

2006 ◽  
Vol 220 (2) ◽  
pp. 79-87 ◽  
Author(s):  
J Keays ◽  
C Meskell
Keyword(s):  
Waste Water ◽  
Power Consumption ◽  
Turbulence Model ◽  
Numerical Models ◽  
Sewage Treatment ◽  
Computational Cost ◽  
Primary Source ◽  
Pressure Head ◽  
Primary Objective ◽  
Pump Efficiency

A single-vaned centrifugal pump, typical of the kind employed in waste-water applications (e.g. sewage treatment), has been investigated numerically. The primary objective was to identify a modelling approach that was accurate, but at an acceptable computational cost. A test program has been executed to provide data to validate the numerical models. The global performance of the pump was assessed in terms of the pressure head, the mass flowrate, the power consumption, and the pump efficiency. In addition, time-resolved surface-pressure measurements were made at the volute wall. Five combinations of three modelling approximations (two or 3D; k-ε or Reynolds stress model turbulence model; unsteady or quasi-steady) were investigated and compared with the experimental results. It was found that the choice of turbulence model did not have a significant effect on the predictions. In all cases, the head-discharge curve was well predicted. However, it was found that only the quasi-steady models could capture the trend of the power consumption curve, and hence that of the efficiency. Discrepancies in the magnitude of the power consumption can be accounted for by the lack of losses such as leakage in the numerical models. Qualitative analysis of the numerical results identifies the trailing edge of the impeller as the primary source of power loss, with the flow in the region of the cut water also contributing significantly to the poor overall efficiency of the design.

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