An Alternative Sprayable Daily Landfill Cover Manufacturing Using Local Resources of Latvia

2019 ◽  
Vol 800 ◽  
pp. 115-121
Author(s):  
Olita Medne ◽  
Rita Serzane ◽  
Gita Sakale ◽  
Liga Berzina-Cimdina
Keyword(s):  
Clay Minerals ◽  
Physical Condition ◽  
Field Conditions ◽  
Wood Fibers ◽  
Waste Landfill ◽  
Landfill Cover ◽  
Local Resources ◽  
Alternative Daily Cover

An alternative daily cover (ADC) is a recommended part of the modern waste landfill. Developed by ADC, involving clay minerals available in Latvia as well as wood fibers; 2 appropriate composites are selected. The coating's effectiveness has been estimated for odour in the environment, and the coating has been tested in field conditions. The obtained coating shows the ability to maintain a physical condition more than a month without changing its consistency. Compared with commercially available daily cover, which is many times higher in price, the developed coating exhibits the same odour characteristics. It is recommended to continue testing and assess the ability to absorb harmful elements by using this coating.

Scaling methane oxidation: From laboratory incubation experiments to landfill cover field conditions

2011 ◽  
Vol 31 (5) ◽  
pp. 978-986 ◽  
Author(s):  
Tarek Abichou ◽  
Koenraad Mahieu ◽  
Jeff Chanton ◽  
Mehrez Romdhane ◽  
Imane Mansouri
Keyword(s):  
Methane Oxidation ◽  
Field Conditions ◽  
Landfill Cover ◽  
Laboratory Incubation ◽  
Incubation Experiments

Choosing the most effective hazardous waste landfill cover

1996 ◽  
Vol 6 (2) ◽  
pp. 23-41 ◽  
Author(s):  
Ronald W. Warren ◽  
Thomas E. Hakonson ◽  
Kenneth V. Bostick
Keyword(s):  
Hazardous Waste ◽  
Waste Landfill ◽  
Landfill Cover ◽  
Hazardous Waste Landfill

Performance evaluation of an on-site biocomplex textile as an alternative daily cover in a sanitary landfill, South Korea

2018 ◽  
Vol 36 (12) ◽  
pp. 1137-1145 ◽  
Author(s):  
Jeonghee Yun ◽  
Hyekyeng Jung ◽  
Hyungjoo Choi ◽  
Kyung-Cheol Oh ◽  
Jun-Min Jeon ◽  
...  
Keyword(s):  
Diversity Indices ◽  
Nonwoven Fabric ◽  
Average Concentration ◽  
Odor Intensity ◽  
Community Diversity ◽  
Suitable Alternative ◽  
Landfill Cover Soil ◽  
Landfill Cover ◽  
Cover Soil ◽  
Alternative Daily Cover

The performance of a biocomplex textile prototype was evaluated as an alternative daily cover at an operational landfill site to mitigate odors and methane. The biocomplex textile prototype consisted of two layers of nonwoven fabric and biocarrier immobilized microorganisms and showed excellent removal of odors and methane compared to landfill cover soil. The complex odor intensity (odor dilution ratio (ODR)) on the surface of landfill cover soil was 1,000–10,000 ODR (average of 4,204 ODR), whereas it was 5–250 ODR (average of 55 ODR) on the surface of biocomplex textile. Hydrogen sulfide, which contributes a significant odor intensity, had an average concentration on the biocomplex textile of 8.64 parts-per-billion (ppb), compared to 1733.21 ppb on the landfill cover soil. The biocomplex textile also showed effective methane removal with methane concentrations of 0–1.2% (average of 0.3%) on the biocomplex textile compared to 0–20% (average of 5.3%) on the landfill cover soil. Bacterial community diversity in the biocomplex textile increased with time until an operating period of 66 days, after which diversity indices were maintained at a constant level. The dominant species were the methanotrophs Methylocaldum and Methylobacter, and the non-methanotrophs Acinetobacter, Serpens, Ohtaekwangia, and Actinophytocola. These results demonstrate that on-site biocomplex textile is a suitable alternative daily cover to mitigate odors and methane in landfills.

Hydrated form of some clay minerals observed using a film sealed environmental cell

1978 ◽  
Vol 36 (1) ◽  
pp. 72-73
Author(s):  
N. Kohyama ◽  
K. Fukushima ◽  
A. Fukami
Keyword(s):  
Clay Minerals ◽  
Morphological Changes ◽  
Carbon Film ◽  
Electron Microscopic Observation ◽  
Adsorbed Water ◽  
Electron Microscopic ◽  
Hydrated Form ◽  
Thin Carbon ◽  
Environmental Cell ◽  
Thin Carbon Film

Since the interlayer or adsorbed water of some clay minerals are quite easily dehydrated in dried air, in vacuum, or at moderate temperatures even in the atmosphere, the hydrated forms have not been observed by a conventional electron microscope(TEM). Recently, specific specimen chambers, “environmental cells(E.C.),” have been developed and confirmed to be effective for electron microscopic observation of wet specimen without dehydration. we observed hydrated forms of some clay minerals and their morphological changes by dehydration using a TEM equipped with an E.C..The E.C., equipped with a single hole copper-microgrid sealed by thin carbon-film, attaches to a TEM(JEM 7A) with an accelerating voltage 100KV and both gas pressure (from 760 Torr to vacuum) and relative humidity can be controlled. The samples collected from various localities in Japan were; tubular halloysite (l0Å) from Gumma Prefecture, sperical halloysite (l0Å) from Tochigi Pref., and intermediate halloysite containing both tubular and spherical types from Fukushima Pref..

Colloidal systems in soils

1994 ◽  
Vol 52 ◽  
pp. 64-65
Author(s):  
J. Thieme ◽  
J. Niemeyer ◽  
P. Guttman
Keyword(s):  
Clay Minerals ◽  
Polymeric Materials ◽  
Spatial Arrangement ◽  
High Specific Surface Area ◽  
Turnover Rates ◽  
Colloidal Systems ◽  
Chemical Conditions ◽  
Aggregation Phenomena ◽  
Iron And Manganese ◽  
Soil Colloids

In soil science the fraction of colloids in soils is understood as particles with diameters smaller than 2μm. Clay minerals, aquoxides of iron and manganese, humic substances, and other polymeric materials are found in this fraction. The spatial arrangement (microstructure) is controlled by the substantial structure of the colloids, by the chemical composition of the soil solution, and by thesoil biota. This microstructure determines among other things the diffusive mass flow within the soils and as a result the availability of substances for chemical and microbiological reactions. The turnover of nutrients, the adsorption of toxicants and the weathering of soil clay minerals are examples of these surface mediated reactions. Due to their high specific surface area, the soil colloids are the most reactive species in this respect. Under the chemical conditions in soils, these minerals are associated in larger aggregates. The accessibility of reactive sites for these reactions on the surface of the colloids is reduced by this aggregation. To determine the turnover rates of chemicals within these aggregates it is highly desirable to visualize directly these aggregation phenomena.

Sign in / Sign up

Export Citation Format

Share Document