scholarly journals A Review on the Methods of Industrial Waste Water Treatment

2021 ◽  
pp. 20-31
Author(s):  
Khandakar M. Nahiun ◽  
Bijoyee Sarker ◽  
Kamrun N. Keya ◽  
Fatin I. Mahir ◽  
Shahirin Shahida ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Low Cost ◽  
Waste Water Treatment ◽  
Industrial Wastes ◽  
Public Concern ◽  
Industrial Waste Water ◽  
Halogenated Hydrocarbon ◽  
Aerobic Wastewater Treatment ◽  
The Impact ◽  
Different Sources

Nowadays environmental pollution is a great threat to us. Water resources are mostly polluted by industrial wastes. Among all other pollutions, water pollution is one of the most vital pollution caused by different sources like industrial, domestic, sewage, hazardous waste, municipal waste, medical waste, manufacturing waste, etc. Public concern over the impact of wastewater has increased. There are several methods for the treatment of wastewater. Among them, techniques like coagulation, adsorption, activated sludge are prominent. The use of aerobic wastewater treatment as a reductive medium is receiving attention for its low cost of operation and low cost of maintenance. The uses of low-cost adsorbents are also effective in wastewater treatment. The aerobic wastewater is effective in degrading the contaminants. There are different electrolytic techniques as well for wastewater treatment. This paper reviews the possible techniques available for the treatment of wastewater to remove contaminants such as halogenated hydrocarbon compounds, heavy metals, dyes, pigments etc. from the wastewater.

Sorption of heavy metals from industrial waste water by low-cost mineral silicates

Clay Minerals ◽  
1999 ◽  
Vol 34 (3) ◽  
pp. 469-477 ◽  
Author(s):  
A. Garcia Sanchez ◽  
E. Alvarez Ayuso ◽  
O. Jimenez de Blas
Keyword(s):  
Waste Water ◽  
Heavy Metals ◽  
Industrial Waste ◽  
Low Cost ◽  
Reaction Medium ◽  
Cost Effective ◽  
Industrial Wastes ◽  
Industrial Waste Water ◽  
Adsorption Processes ◽  
Mineral Silicates

AbstractThe adsorption by different silicate minerals of some heavy metals, present in industrial waste water, has been studied. These adsorbents (mainly clay minerals) are readily available, inexpensive materials and offer a cost-effective alternative to conventional treatment of wastes from the metal finishing industry. The results show that some mineral species are suitable for the purification of such residual waters down to the limits prescribed by current legislation concerning industrial wastes. The Langmuir model was found to describe such adsorption processes best. Sepiolite (Orera, Spain) has an adsorption capacity of 8.26 mg g-1 for Cd2+, the capacities depending on the metal adsorbed in the order: Cd2+ > Cu2+ > Zn2+ > Ni2+. This mineral shows the highest sorption capacity relative to the other minerals studied. Factors in the reaction medium such as pH and ionic strength influenced the adsorption process.

scholarly journals Assessing the impact of different sources of topographic data on 1-D hydraulic modelling of floods

2014 ◽  
Vol 11 (7) ◽  
pp. 7375-7408 ◽  
Author(s):  
A. Md Ali ◽  
D. P. Solomatine ◽  
G. Di Baldassarre
Keyword(s):  
Thermal Emission ◽  
Low Cost ◽  
Water Levels ◽  
Flood Inundation ◽  
Model Accuracy ◽  
Hydraulic Models ◽  
Topographic Data ◽  
Ground Survey ◽  
The Impact ◽  
Different Sources

Abstract. Topographic data, such as digital elevation models (DEMs), are essential input in flood inundation modelling. DEMs can be derived from several sources either through remote sensing techniques (space-borne or air-borne imagery) or from traditional methods (ground survey). The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER), the Shuttle Radar Topography Mission (SRTM), the Light Detection and Ranging (LiDAR), and topographic contour maps are some of the most commonly used sources of data for DEMs. These DEMs are characterized by different precision and accuracy. On the one hand, the spatial resolution of low-cost DEMs from satellite imagery, such as ASTER and SRTM, is rather coarse (around 30–90 m). On the other hand, LiDAR technique is able to produce a high resolution DEMs (around 1m), but at a much higher cost. Lastly, contour mapping based on ground survey is time consuming, particularly for higher scales, and may not be possible for some remote areas. The use of these different sources of DEM obviously affects the results of flood inundation models. This paper shows and compares a number of hydraulic models developed using HEC-RAS as model code and the aforementioned sources of DEM as geometric input. The study was carried out on a reach of the Johor River, in Malaysia. The effect of the different sources of DEMs (and different resolutions) was investigated by considering the performance of the hydraulic models in simulating flood water levels as well as inundation maps. The outcomes of our study show that the use of different DEMs has serious implications to the results of hydraulic models. The outcomes also indicates the loss of model accuracy due to re-sampling the highest resolution DEM (i.e. LiDAR 1 m) to lower resolution are much less compared to the loss of model accuracy due to the use of low-cost DEM that have not only a lower resolution, but also a lower quality. Lastly, to better explore the sensitivity of the hydraulic models to different DEMs, we performed an uncertainty analysis based on the GLUE methodology.

scholarly journals An Experimental Study for the Remediation of Industrial Waste Water Using Combination of Low Cost Mineral Raw Materials

2019 ◽  
Author(s):  
Petros Petrounias ◽  
Aikaterini Rogkala ◽  
Panagiota P. Giannakopoulou ◽  
Basilios Tsikouras ◽  
Paraskevi Lampropoulou ◽  
...  
Keyword(s):  
Waste Water ◽  
Continuous Flow ◽  
Mine Drainage ◽  
Raw Materials ◽  
Low Cost ◽  
Raw Material ◽  
Industrial Waste Water ◽  
Mineral Raw Materials ◽  
Ph Values ◽  
The Impact

This paper investigates an alternative use of sterile aggregate materials which may arise from various construction applications in conjunction with other low-cost mineral raw materials to remediate the acid mine drainage phenomenon. This study is based on the combination of unprocessed mineral raw materials as well as on the basic concept of the cyclic economy where the conversion of a waste into a raw material for another application can be achieved. In this way, the value of mineral raw materials can be prolonged for as long as possible, waste generation and exploitation of natural resources are minimized and resources are kept as far as possible within the existing economy. In this study, an electrically continuous flow driven forced device proposed and demonstrated for the remediation of waste water in lab-scale by using certain mixes of mineral raw materials (serpentinite, andesite, magnesite, peat and biochar). Our results focus on the impact of the studied mineral raw materials and especially on their synergy on the water purification potential under continuous water flow operation. Using the proposed 7-day experimental electrically continuous flow driven forced device with the certain mixes of mineral raw materials, the increase of pH values from 3.00 to 6.82 as well as significant removal of Fe, Cu and Zn was achieved.

scholarly journals Jamming/Garbling assessment and possible mitigations in the OpenSky network

10.29007/fn6z ◽  
2019 ◽  
Author(s):  
Mauro Leonardi ◽  
Martin Strohmeier ◽  
Vincent Lenders
Keyword(s):  
Radio Frequency ◽  
Real World ◽  
Traffic Control ◽  
Surveillance System ◽  
Air Traffic Control ◽  
Low Cost ◽  
Frequency Channel ◽  
Mitigation Techniques ◽  
The Impact ◽  
Different Sources

The Automatic Dependent Surveillance-Broadcast (ADS-B) technology is one of the pillars of the future surveillance system for air traffic control. However, its many fundamental vulnerabilities are well known and an active area of research. This paper examines two closely related ADS-B radio frequency channel issues, jamming and garbling.Both jamming and garbling produce the same physical effect: the reception of mixed signals, coming from different sources (usually not co-located). In this paper, we assess the impact of these reception problems and examine three separate mitigation techniques. Through the use of theoretical evaluations, simulations and real-world analysis based on data collected by the OpenSky Network, we compare their effectiveness and establish a first baseline for their use in modern low-cost, crowdsourced ADS-B networks.

Wastewater Treatment in Stabilization Ponds with Higher Aquatic Plants

1987 ◽  
Vol 19 (12) ◽  
pp. 287-288
Author(s):  
V. I. Tsiprijan ◽  
V. V. Kravets
Keyword(s):  
Wastewater Treatment ◽  
Aquatic Plants ◽  
Waste Water Treatment ◽  
Simultaneous Increase ◽  
Industrial Waste Water ◽  
Higher Aquatic Plants ◽  
Stabilization Ponds ◽  
Surface Active ◽  
Active Substances ◽  
Vitamin Production

Higher aquatic plants (HAP) provide more effective tertiary wastewater treatment in biological ponds. They also accelerate the clean-up process with simultaneous increase of hydraulic loading. There was observed not only high removal efficiency for domestic organics, but also for various universal pollutants such as oil, synthetic surface active substances and phenols. Our findings have demonstrated that HAP stabilization ponds may be used successfully for industrial waste water treatment. We have also shown it expedient to apply the method in biological, biochemical and vitamin production plants and sugar refineries. HAP of reed, cane and rush proved to be the most effective plants to use.

scholarly journals APPLICATIONS OF ACTIVATED CARBON IN WASTE WATER TREATMENT AS A LOW COST MEDIA

2021 ◽  
Vol 5 (11) ◽  
Author(s):  
R.P.K Dasanayaka
Keyword(s):  
Waste Water ◽  
Wastewater Treatment ◽  
Activated Carbon ◽  
Activated Carbons ◽  
Low Cost ◽  
Agricultural Waste ◽  
Waste Water Treatment ◽  
Activation Process ◽  
Untreated Wastewater ◽  
Recovery Methods

Environmental pollution caused by the anthropogenic activities is a global challenge. Pollution due to discharge of untreated wastewater, contributes to it considerably. High expenditures for the treatment technologies can be considered as one of the major reason for improper wastewater discharge. Activated carbon provides an excellent solution for this issue as it can be used as a low cost wastewater treatment adsorbent. This paper review, types of activated carbon, their applications and recovery methods in wastewater treatment. Activated carbon from conventional waste such as agricultural waste, woody waste and non conventional waste such as municipal waste can be used as a low cost media for waste water purifications. Physical and chemical processes are used to improve the adsorption property of the activated carbon. H3PO4, KOH and ZnCl2 are the most frequently used chemicals for the activation process. Granular activated carbon, powdered activated carbon, activated carbon fibers and carbon clothes are the major physical forms of the activated carbon. These physical forms are important to maximize the adsorption process according to the purpose of usage. Activated carbon is used to remove heavy metals, dyes, COD, BOD, organic contaminants and volatile organic compounds in the waste water. Various recovery methods are applied to regenerate activated carbons. Among them, chemical, thermal, and bio regeneration methods are examined. Strengths, weaknesses, opportunities, threats related to use of activated carbon and future research priority areas are also discussed

scholarly journals We motif of social violence in the space of cinematic communication

2021 ◽  
Vol 27 (3) ◽  
pp. 167-186
Author(s):  
К. A. Tarasov
Keyword(s):  
Negative Impact ◽  
Low Cost ◽  
Public Concern ◽  
Social Significance ◽  
Social Violence ◽  
The Public ◽  
The Status ◽  
Cultural Code ◽  
Russian Cinema ◽  
The Impact

Social violence traditionally has been a constituent in the information flow of artistic communication, of the cinematic one especially. With the language specific to cinema it is easier, than with the languages of other arts, to attract and command the attention of a broad public with the spectacle of violence. Also, as a rule, it is more economical because of the relatively low cost of embodying violence on the screen considering the overall expensiveness of film production. In the West, the filming of practices of violence aimed at entertaining the public, as well as the public concern at the possibility of their negative impact on the rising generation, has a long history. Within the concept of “the audience as the victim” there were thousands of studies conducted, especially in USA. In the USSR cinema of the entertainment orientation was under the ideological ban which put the representation of violence within certain boundaries. In the 1990s the situation of cinema changed drastically. Je escalation of entertainment violence on the screen caused a public concern. Sociologists began to study its perception by and impact on spectators. In this regard, the article considers the experience of conceptualizing the reformatting of its representation after, consequent upon the impact of the last century’s revolutionary violence, cinema had obtained the status of “the most important of all the arts” and “the social significance” of the violence became the cultural code of its representation. But with the transition of Russian cinema to the market, foreign entertainment movies were granted open access to the nation’s film screens. Entertainment violence reached the status of a commercially important communicative attraction. Its effectiveness in this function is viewed in the article based on the materials of sociological surveys conducted among filmgoers of the cities of Kirov and Ekaterinburg. Another side of the issue considered as well is the sociocultural effects of violent images on the rising generation in whose midst there is a “risk group” that merits careful research and preventive acknowledgment in the process of social control.

Review of Microbial Fuel Cells for Wastewater Treatment: Large-Scale Applications, Future Needs and Current Research Gaps

2013 ◽  
Author(s):  
Michael G. Waller ◽  
Thomas A. Trabold
Keyword(s):  
Wastewater Treatment ◽  
Fuel Cell ◽  
Microbial Fuel Cells ◽  
Large Scale ◽  
Organic Waste ◽  
Low Cost ◽  
Waste Water Treatment ◽  
Oxygen Demand ◽  
Industrial Applications ◽  
Research Gaps

There is growing interest in innovative waste water treatment technologies that can utilize the inherent energy-producing potential of organic waste. A microbial fuel cell (MFC) is a type of bioreactor that produces electricity by converting energy in the chemical bonds of organic material, through a catalytic reaction of microorganisms under anaerobic conditions. MFCs provide a promising low cost, highly efficient, and renewable energy-producing alternative to conventional wastewater treatments. MFC technology at the laboratory scale has advanced to the point where chemical oxygen demand (COD) removal efficiencies (RE) over 90% are commonly achieved; however, low coulombic efficiencies (CE) and power densities often result when treating actual industrial and domestic wastewaters. In spite of their low energy recovery and power production, MFCs have been shown to be economically viable when factoring in costs savings from the sale of produced chemical byproducts and reduction of solid waste removal costs. However, further research of large-scale MFC wastewater treatment applications must be performed to determine the extent of their feasibility. This paper reviews several pilot-test MFC systems, addresses promising future industrial applications, and discusses current research gaps in MFC technology for wastewater treatment. Of particular interest in our research program is the use of MFCs to treat liquid-phase organic waste generated at food processing plants. Because of the general scalability of fuel cell systems, there is reason to believe that an MFC treatment system would be better suited to relatively small waste flow rates, unlike other treatment methods (e.g., anaerobic digestion) which typically require large volume to achieve economic viability.

Computer simulation study about the dependence of amorphous silicon photonic waveguides efficiency on the material quality

2020 ◽  
Vol 90 (3) ◽  
pp. 30502
Author(s):  
Alessandro Fantoni ◽  
João Costa ◽  
Paulo Lourenço ◽  
Manuela Vieira
Keyword(s):  
Amorphous Silicon ◽  
High Throughput Screening ◽  
Simulation Analysis ◽  
Low Cost ◽  
Deposition Process ◽  
Large Area ◽  
Sidewall Roughness ◽  
Sensing Applications ◽  
Fabrication Defects ◽  
The Impact

Amorphous silicon PECVD photonic integrated devices are promising candidates for low cost sensing applications. This manuscript reports a simulation analysis about the impact on the overall efficiency caused by the lithography imperfections in the deposition process. The tolerance to the fabrication defects of a photonic sensor based on surface plasmonic resonance is analysed. The simulations are performed with FDTD and BPM algorithms. The device is a plasmonic interferometer composed by an a-Si:H waveguide covered by a thin gold layer. The sensing analysis is performed by equally splitting the input light into two arms, allowing the sensor to be calibrated by its reference arm. Two different 1 × 2 power splitter configurations are presented: a directional coupler and a multimode interference splitter. The waveguide sidewall roughness is considered as the major negative effect caused by deposition imperfections. The simulation results show that plasmonic effects can be excited in the interferometric waveguide structure, allowing a sensing device with enough sensitivity to support the functioning of a bio sensor for high throughput screening. In addition, the good tolerance to the waveguide wall roughness, points out the PECVD deposition technique as reliable method for the overall sensor system to be produced in a low-cost system. The large area deposition of photonics structures, allowed by the PECVD method, can be explored to design a multiplexed system for analysis of multiple biomarkers to further increase the tolerance to fabrication defects.

Advancing dairy farming profitability through research

2001 ◽  
pp. 17-22
Author(s):  
J.R. Caradus ◽  
D.A. Clark
Keyword(s):  
Research And Development ◽  
Dairy Cow ◽  
Low Cost ◽  
Pasture Management ◽  
Nitrogen Fertiliser ◽  
Grass Endophyte ◽  
Forage Species ◽  
Development Outcomes ◽  
Dairy Cow Nutrition ◽  
The Impact

The New Zealand dairy industry recognises that to remain competitive it must continue to invest in research and development. Outcomes from research have ensured year-round provision of low-cost feed from pasture while improving productivity. Some of these advances, discussed in this paper, include the use of white clover in pasture, understanding the impacts of grass endophyte, improved dairy cow nutrition, the use of alternative forage species and nitrogen fertiliser to improve productivity, demonstration of the impact of days-in-milk on profitability, and the use of feed budgeting and appropriate pasture management. Keywords: dairy, profitability, research and development

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