scholarly journals Quantification and characterization of the production of biogas from blends of agro-industrial wastes in a large-scale demonstration plant

2016 ◽  
Vol 38 (4) ◽  
pp. 415 ◽  
Author(s):  
Odorico Konrad ◽  
João Vicente Akwa ◽  
Fábio Fernades Koch ◽  
Marluce Lumi ◽  
Jaqueline Tonetto
Keyword(s):  
Anaerobic Digestion ◽  
Large Scale ◽  
Research Work ◽  
Poultry Manure ◽  
Liquid Waste ◽  
Oxygen Demand ◽  
Industrial Wastes ◽  
Relationship Of ◽  
Physical And Chemical

The use of energy contained in biogas is an interesting alternative to reconcile renewable electric power generation to environmental sanitation. Among the technologies used for recovering energy from biomass, the anaerobic digestion demonstrates ability to treat solid waste and effluents. This research work aims to analyze the influence of physical and chemical factors on the performance of anaerobic digestion reactors and to perform the characterization of biogas in order to assess their quality. The substrate evaluated is the mixture of liquid waste coming from different industrial processes and poultry manure. The characterization of CH4, CO2, H2S and O2 was performed daily in two reactors, R1 and R2, for a period of three months, and the physical and chemical parameters were analyzed biweekly. The parameters analyzed are carbon (C), nitrogen (N), biochemical oxygen demand (BOD), pH, total (TS), volatiles (VS) and fixed solids (FS). Among the results, stands out an average removal of 76% in relation to BOD and H2S concentration of 156.01 for R1, and of 91.64 ppm for R2, and the CH4:CO2 inverse relationship of 3.15 for R1 and 2.98 for R2, during the monitoring period.  

Production of Bio Gas from Vegetable and Flowers Wastes Using Anaerobic Digestion

2015 ◽  
Vol 787 ◽  
pp. 803-808 ◽  
Author(s):  
A. Deepanraj ◽  
S. Vijayalakshmi ◽  
J. Ranjitha
Keyword(s):  
Anaerobic Digestion ◽  
Biogas Production ◽  
Research Work ◽  
Pressure Gauge ◽  
Pig Manure ◽  
Future Research ◽  
Digital Pressure ◽  
Vegetable Wastes ◽  
Main Component

The present research paper describes about the anaerobic digestion of vegetable (Banana, Cauliflower, potato, and sweet potato) and flower wastes (Rose, sambangi, gulmohar, marigold, golden shower tree, silk tree mimosa) in a 1L capacity of anaerobic digestor using pig manure as an inoculums. The digester was operated in the ratio of 1:1 of substrate to inoculums at RT. The substrate concentrations are varied such as 5%, 7%, and 10% was used and amount of gas produced was analysed using digital pressure gauge. The results obtained showed that, marigold flower had given higher yield of biogas than vegetable wastes and the digestion period was less. The average biogas production potential of withered flowers was observed as 14.36 g/kg in 5 days, where in case of vegetable wastes it was 10.0234 g/kg in 6 days. The study showed that flowers which are available in abundant in India is thrown away within a day, in the environment. These feedstocks are good feed stock for the production of biogas. The generation of biogas from flowers and vegetable waste upholds the concept of waste to wealth in enhancing sustainability of development. The future research work is mainly focused on the characterization of the main component present in the bio-gas using sophisticated instruments.

Geographical distribution of land types and primary field research work in Jalilabad Cadastral District

2020 ◽  
Vol 04 (05) ◽  
pp. 44-48
Author(s):  
Narmin Zakir Najafova ◽  
Keyword(s):  
Geographical Distribution ◽  
Large Scale ◽  
Research Work ◽  
Field Research ◽  
Soil Formation ◽  
Large Area ◽  
Large Scale Land ◽  
Physical And Chemical ◽  
Land Types ◽  
Zonal Soils

Factors influencing the formation of land cover of Jalilabad cadastral region are one of the reasons for the diversity of soil formation processes in the area. Intra-zonal soils are subject to the laws of vertical zoning due to changes in the height of the area due to its geographical distribution. Despite the fact that the Jalilabad cadastral region does not have a very large area, its separate parts are characterized by differences in bioclimatic and biogeochemical characteristics. The article shows the analysis and geographical coordinates of the main soil types formed in the Jalilabad cadastral region on the basis of a large-scale land map, depending on the soil-ecological conditions. In order to carry out comparative and ecological assessment of soils, we have made land plots in the study area. Currently, the cut samples are in the laboratory stage for physical and chemical analysis in accordance with the methodology. Key words: soil type, mechanical composition, soil structure, soil profile, GPS

Geographical distribution of land types and primary field research work in Jalilabad Cadastral District

2021 ◽  
Vol 03 (01) ◽  
pp. 88-93
Author(s):  
Nərmin Zakir qızı Nəcəfova Zakir qızı Nəcəfova ◽  
Keyword(s):  
Geographical Distribution ◽  
Large Scale ◽  
Research Work ◽  
Field Research ◽  
Soil Formation ◽  
Large Area ◽  
Large Scale Land ◽  
Physical And Chemical ◽  
Land Types ◽  
Zonal Soils

Factors influencing the formation of land cover of Jalilabad cadastral region are one of the reasons for the diversity of soil formation processes in the area. Intra-zonal soils are subject to the laws of vertical zoning due to changes in the height of the area due to its geographical distribution. Despite the fact that the Jalilabad cadastral region does not have a very large area, its separate parts are characterized by differences in bioclimatic and biogeochemical characteristics. The article shows the analysis and geographical coordinates of the main soil types formed in the Jalilabad cadastral region on the basis of a large-scale land map, depending on the soil-ecological conditions. In order to carry out comparative and ecological assessment of soils, we have made land plots in the study area. Currently, the cut samples are in the laboratory stage for physical and chemical analysis in accordance with the methodology. Key words: soil type, mechanical composition, soil structure, soil profile, GPS

scholarly journals Management approach of livestock manure in present farming system of Bangladesh

2019 ◽  
Vol 5 (1) ◽  
pp. 63-70
Author(s):  
Jobaida Shovna Khanam ◽  
Khan Shahidul Huque ◽  
Nazmul Huda ◽  
Mohammad Khairul Bashar
Keyword(s):  
Anaerobic Digestion ◽  
Performance Indicator ◽  
Storage System ◽  
Research Work ◽  
Poultry Manure ◽  
Small Ruminants ◽  
Farming System ◽  
Management Approach ◽  
Livestock Manure ◽  
Liquid Slurry

Laying aside manure meat, milk and egg is considered as key performance indicator of livestock farm profitability of Bangladesh till yet whereas manure contains minimum 45-55% feed nutrient fed to animals. A survey based research work was conveyed to find out the major channel of using this valuable livestock manure by farmers from twelve selected district of Bangladesh. Results showed that most of the cattle and buffalo farmers prefer solid storage system to manage their manure. From this stored manure, about 35% was used for land fertilization, 47% for burning fuel preparation, 8% for composting and remaining 10% become completely wasted. A very few of cattle manure (4.65) was utilized by the care of anaerobic digestion. But this improved system was completely absent in case of buffalo and small ruminants manure management. Dung produced from small ruminants fully goes for solid piling. About 20% of poultry manure managed in improved way and the remaining portion was mostly utilized in a very disparage way. In anaerobic digestion system, the produced gas went for home consumption and bio-slurry creates havoc for both farmer and environment. Land fertilization and aquaculture coves its utilization but the amount is too low compared to its production. Above 52% of total bio-slurry become wasted due to limited knowledge and lack of appropriate handling techniques. The scenario of urine and liquid slurry management was very melancholic. About 0.37 and 0.203 kg methane emission per head per year was calculated from solid storage system of cattle and small ruminant animal manure. The value is also high in burning fuel preparation (5.46 kg) and liquid slurry (5.81 kg) and a bit low in anaerobic digestion system (1.24 kg) per head per year. Asian J. Med. Biol. Res. March 2019, 5(1): 63-70

Initial Assessment of Microbial Fuel Cells for the Treatment of Tofu Processing Waste

2015 ◽  
Author(s):  
Steven T. Barber ◽  
Josh M. Dranoff ◽  
Thomas A. Trabold
Keyword(s):  
Organic Material ◽  
Microbial Fuel Cells ◽  
Large Scale ◽  
Relative Proportion ◽  
Oxygen Demand ◽  
Initial Assessment ◽  
Publicly Owned Treatment Works ◽  
High Concentrations ◽  
Aeration Process

Due to ever increasing industrial organic material wastewater regulations, there is growing interest in the food production industry for technologies to mitigate soluble waste discharges. Currently, food manufacturers in NYS with wastewaters that have high concentrations of soluble organic material, indicated by its chemical oxygen demand (COD), are charged substantial premiums by publicly owned treatment works (POTWs) to dispose of their high COD wastewaters. As a result, these producers are keen on pursuing more economical and sustainable alternatives. One novel option is a microbial fuel cell (MFC), a recently developed type of bioreactor that greatly reduces soluble COD by harnessing the electrochemical potential found in the chemical bonds of these organic materials through redox reactions under anaerobic conditions facilitated by exoelectrogenic microorganisms. MFC technology treating homogeneous substrates such as acetate at the laboratory scale has advanced to the point where COD removal efficiencies of over 90% are commonly achieved; however, efficiencies at treating less uniform, high COD level industrial scale food manufacturing wastewaters have only been investigated in a handful of studies. Since most real world wastewaters are non-uniform, MFC performance characterization of treating these actual discharges is crucial in determining their efficacy and cost effectiveness in large scale applications. To help fill this gap, this paper gives a relative efficacy comparison of five identical 3 L bench scale single chamber and three dual chamber MFC configurations (SCMFCs and DCMFCs, respectively) to a simulated POTW aeration process treating high COD whey effluent from a tofu manufacturing plant. Standard parametric EPA water quality tests of COD reduction were performed to assess the extent of the MFCs and POTW simulant effectiveness. COD levels in the MFC’s were reduced between 72% and 92%, while the POTW aeration process reduced levels 98%. This corroborates previously published studies showing that POTW systems are effective in reducing COD, but also that MFCs could be a more sustainable option due to their unique ability to directly produce, rather than consume, electric current. While these findings are promising, more studies are required to accurately determine the relative proportion of bioelectrochemical and methanogenic processes in the actual lowering of the COD levels.

scholarly journals Pollution Source Identification of Halda River Water Using Field Observation, Laboratory Analysis and GIS Technique

2019 ◽  
Vol 35 (5) ◽  
pp. 1480-1490
Author(s):  
Mohammad Abdul Karim ◽  
Mohammad Helal Uddin ◽  
Suman Barua ◽  
Biswajit Nath ◽  
Aminul Islam Chowdhury ◽  
...  
Keyword(s):  
Water Quality ◽  
Anthropogenic Activities ◽  
Research Work ◽  
Oxygen Demand ◽  
Pollution Source ◽  
Quality Parameters ◽  
Industrial Wastes ◽  
Total Alkalinity ◽  
Gis Technique ◽  
Index Study

Halda River (HR), the lone natural carp breeding ground in Bangladesh as well as in Southeast Asia is an economically important river and its water quality is deteriorating due to unplanned industrialization and various anthropogenic activities. The present research work has been conducted to assess the characteristics of HR water. Eighteen water quality parameters were studied including pH, temperature, Dissolved Oxygen (DO), Biological Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Total Dissolved Solids, Electrical Conductivity, Hardness, Turbidity, Total Alkalinity, SO42-, PO43-, NO3-, Cl-, NH4+, Cr (VI), Mn (II) and Arsenic. This study shows that water in HR is regularly alkaline and its pH lies between 7.08-7.65. The DO value varies from 5.9-8.4 mgL-1, BOD ranged from 0.3-2.8 mgL-1 and COD from 24-96 mgL-1. According to the Water Quality Index study, the river is being intensely polluted due to the unscrupulous industrial wastes discharge into the HR through various canals.

scholarly journals PHYSICAL AND CHEMICAL CHARACTERIZATION OF INDUSTRIAL EFFLUENTS OF SORVETES AFTER APPLICATION OF FLOCULANTES

2018 ◽  
Vol 15 (29) ◽  
pp. 276-281
Author(s):  
M. L. NIELAND ◽  
M. C. DALLAZEN ◽  
A. UEBEL ◽  
M. P. MÜLLER ◽  
M. COLLING ◽  
...  
Keyword(s):  
Oxygen Demand ◽  
Chemical Characterization ◽  
Industrial Effluents ◽  
Organic Load ◽  
Environmental Standards ◽  
Rio Grande Do Sul ◽  
Physical And Chemical Characterization ◽  
To Come ◽  
Physical And Chemical

The dairy industry plays a major role both economically and socially in Brazil. However, it generates a significant volume of effluent that presents high organic load. Because of this, a proper treatment is required for the generated effluent, trying to minimize the environmental impacts of its disposal. One of the alternatives to make these wastes in accordance to the environmental standards is the use of flocculants and coagulants that are capable of neutralizing the negative charges, causing the particles to come together to facilitate the separation process. This study aims to analyze the efficiency of flocculants for the treatment of effluent from a dairy company located in the central region of the state of Rio Grande do Sul, in the Taquari Valley. The flocculants used were Aquafloc and Aquaflot. For this, the parameters of Oils and Greases, Sedimentable Solids and Chemical Oxygen Demand (COD) were tested. Similar results were obtanied with both flocculants. However, from the analyzed parameters, Aquafloc proved to be more efficient for removal of COD.

Skeletal elements of crinoid echinoderms: High-resolution structural and microanalytical results

1983 ◽  
Vol 41 ◽  
pp. 194-195
Author(s):  
D. F. Blake ◽  
L. F. Allard ◽  
D. R. Peacor
Keyword(s):  
High Resolution ◽  
Marine Invertebrates ◽  
Sea Urchins ◽  
Structural Features ◽  
Sea Stars ◽  
High Resolution Tem ◽  
Relationship Of ◽  
The Relationship ◽  
Insight Into

Echinodermata is a phylum of marine invertebrates which has been extant since Cambrian time (c.a. 500 m.y. before the present). Modern examples of echinoderms include sea urchins, sea stars, and sea lilies (crinoids). The endoskeletons of echinoderms are composed of plates or ossicles (Fig. 1) which are with few exceptions, porous, single crystals of high-magnesian calcite. Despite their single crystal nature, fracture surfaces do not exhibit the near-perfect {10.4} cleavage characteristic of inorganic calcite. This paradoxical mix of biogenic and inorganic features has prompted much recent work on echinoderm skeletal crystallography. Furthermore, fossil echinoderm hard parts comprise a volumetrically significant portion of some marine limestones sequences. The ultrastructural and microchemical characterization of modern skeletal material should lend insight into: 1). The nature of the biogenic processes involved, for example, the relationship of Mg heterogeneity to morphological and structural features in modern echinoderm material, and 2). The nature of the diagenetic changes undergone by their ancient, fossilized counterparts. In this study, high resolution TEM (HRTEM), high voltage TEM (HVTEM), and STEM microanalysis are used to characterize tha ultrastructural and microchemical composition of skeletal elements of the modern crinoid Neocrinus blakei.

Some applications of electron beam microanalysis techniques in VLSI process evaluation

1983 ◽  
Vol 41 ◽  
pp. 160-161
Author(s):  
Simon Thomas
Keyword(s):  
Integrated Circuits ◽  
Process Evaluation ◽  
Large Scale ◽  
Technology Development ◽  
Analytical Techniques ◽  
Successful Implementation ◽  
Analysis Of Failures ◽  
Characterization Of Materials ◽  
Circuits Vlsi

Trends in the technology development of very large scale integrated circuits (VLSI) have been in the direction of higher density of components with smaller dimensions. The scaling down of device dimensions has been not only laterally but also in depth. Such efforts in miniaturization bring with them new developments in materials and processing. Successful implementation of these efforts is, to a large extent, dependent on the proper understanding of the material properties, process technologies and reliability issues, through adequate analytical studies. The analytical instrumentation technology has, fortunately, kept pace with the basic requirements of devices with lateral dimensions in the micron/ submicron range and depths of the order of nonometers. Often, newer analytical techniques have emerged or the more conventional techniques have been adapted to meet the more stringent requirements. As such, a variety of analytical techniques are available today to aid an analyst in the efforts of VLSI process evaluation. Generally such analytical efforts are divided into the characterization of materials, evaluation of processing steps and the analysis of failures.

Characterization of defects in tabular silver halide grains

1990 ◽  
Vol 48 (4) ◽  
pp. 1046-1047
Author(s):  
C. Goessens ◽  
D. Schryvers ◽  
J. Van Landuyt ◽  
A. Verbeeck ◽  
R. De Keyzer
Keyword(s):  
Radiation Damage ◽  
Silver Halide ◽  
Chemical Characteristics ◽  
X Ray ◽  
Free Region ◽  
Central Defect ◽  
Crystallographic Defects ◽  
Physical And Chemical ◽  
Two Sides

Silver halide grains (AgX, X=Cl,Br,I) are commonly recognized as important entities in photographic applications. Depending on the preparation specifications one can grow cubic, octahedral, tabular a.o. morphologies, each with its own physical and chemical characteristics. In the present study crystallographic defects introduced by the mixing of 5-20% iodide in a growing AgBr tabular grain are investigated. X-ray diffractometry reveals the existence of a homogeneous Ag(Br1-xIx) region, expected to be formed around the AgBr kernel. In fig. 1 a two-beam BF image, taken at T≈100 K to diminish radiation damage, of a triangular tabular grain is presented, clearly showing defect contrast fringes along four of the six directions; the remaining two sides show similar contrast under relevant diffraction conditions. The width of the central defect free region corresponds with the pure AgBr kernel grown before the mixing with I. The thickness of a given grain lies between 0.15 and 0.3 μm: as indicated in fig. 2 triangular (resp. hexagonal) grains exhibit an uneven (resp. even) number of twin interfaces (i.e., between + and - twin variants) parallel with the (111) surfaces. The thickness of the grains and the existence of the twin variants was confirmed from CTEM images of perpendicular cuts.

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