Review of the Advantages and Disadvantages of
... Anaerobic digestion is a process by which environmentally hazardous organic wastes from municipal, agricultural and industrial sources may be stabilised. The treatment has many side benefits, most notably the production of methane-rich biogas which can be used to generate electricity and heat. Anaer ...
... Anaerobic digestion is a process by which environmentally hazardous organic wastes from municipal, agricultural and industrial sources may be stabilised. The treatment has many side benefits, most notably the production of methane-rich biogas which can be used to generate electricity and heat. Anaer ...
Characterization of nitrifying bacteria in marine recirculation
... biofilters of marine recirculation aquaculture systems (RAS) and the bacteria involved, with special emphasis on the possible causes of malfunction of the crucial conversion of ammonia to nitrate. Three marine RAS with in total five moving-bed biofilters were made available for the investigations by ...
... biofilters of marine recirculation aquaculture systems (RAS) and the bacteria involved, with special emphasis on the possible causes of malfunction of the crucial conversion of ammonia to nitrate. Three marine RAS with in total five moving-bed biofilters were made available for the investigations by ...
Macquarie Marshes Ramsar site: Ecological character description
... 20 per cent and the proportion of organic materials preserved in most areas is generally only 5–10 per cent (Ralph 2008). As these clay-rich soils with mostly uniform texture and colour profiles dry out, they can develop deep cracks that allow water and some litter and other organic material to ente ...
... 20 per cent and the proportion of organic materials preserved in most areas is generally only 5–10 per cent (Ralph 2008). As these clay-rich soils with mostly uniform texture and colour profiles dry out, they can develop deep cracks that allow water and some litter and other organic material to ente ...
Phytophthora dieback1.02 MB - Department of Parks and Wildlife
... As previously mentioned, Phytophthora dieback refers to the plant disease caused by the introduced pathogen P. cinnamomi. Phytophthora cinnamomi is a microscopic soil-borne organism belonging to the Oomycetes or ‘water moulds’. As the name suggests, the organism depends on moist conditions that favo ...
... As previously mentioned, Phytophthora dieback refers to the plant disease caused by the introduced pathogen P. cinnamomi. Phytophthora cinnamomi is a microscopic soil-borne organism belonging to the Oomycetes or ‘water moulds’. As the name suggests, the organism depends on moist conditions that favo ...
coastal and sub-coastal floodplain lakes
... long they are wet or dry, fresh or saline. Although inflowing water to lakes (from rainwater) is fresh, certain lakes may become brackish or saline over time as they dry out, resulting in significant changes to water quality. Some lakes are also naturally saline due to the presence of salts in soil. ...
... long they are wet or dry, fresh or saline. Although inflowing water to lakes (from rainwater) is fresh, certain lakes may become brackish or saline over time as they dry out, resulting in significant changes to water quality. Some lakes are also naturally saline due to the presence of salts in soil. ...
Impact of varying electron donors on the molecular microbial
... (dos Santos et al., 2004; Gauntlett, 1979; Her and Huang, 1995; Janning et al., 1995; Lee and Welander, 1996; Louzeiro et al., 2002; Mulcahy et al., 1981; Purtschert and Gujer, 1999), the actual abundance and diversity of organisms in activated sludge that actually metabolize methanol and alternate ...
... (dos Santos et al., 2004; Gauntlett, 1979; Her and Huang, 1995; Janning et al., 1995; Lee and Welander, 1996; Louzeiro et al., 2002; Mulcahy et al., 1981; Purtschert and Gujer, 1999), the actual abundance and diversity of organisms in activated sludge that actually metabolize methanol and alternate ...
Ecological Character Description of the Eighty Mile
... include the physical, chemical and biological parts of a wetland (from large scale to very small scale, e.g. habitat, species and genes) (Millennium Ecosystem Assessment 2005). are the changes or reactions which occur naturally within wetland systems. They may be physical, chemical or biological. (R ...
... include the physical, chemical and biological parts of a wetland (from large scale to very small scale, e.g. habitat, species and genes) (Millennium Ecosystem Assessment 2005). are the changes or reactions which occur naturally within wetland systems. They may be physical, chemical or biological. (R ...
Paroo River Wetlands Ramsar site: Ecological character description
... abundance data). Information on the distribution and abundance of invertebrates, frogs, reptiles, mammals, terrestrial birds and threatened species in relation to flooding, the composition and distribution of vegetation communities over time, as well as on water quality, soil characteristics and geo ...
... abundance data). Information on the distribution and abundance of invertebrates, frogs, reptiles, mammals, terrestrial birds and threatened species in relation to flooding, the composition and distribution of vegetation communities over time, as well as on water quality, soil characteristics and geo ...
PDF 50 - The Open University
... Eutrophication describes the biological effects of an increase in the concentration of nutrients. The collective term 'nutrients' refers to those elements that are essential for primary production by plants or other photosynthetic organisms. Eutrophication is most often caused by increases in the av ...
... Eutrophication describes the biological effects of an increase in the concentration of nutrients. The collective term 'nutrients' refers to those elements that are essential for primary production by plants or other photosynthetic organisms. Eutrophication is most often caused by increases in the av ...
Community dynamics of ephemeral systems: food web
... concentration of playas, many other regions have similar habitats. One reason why these ecosystems have been studied less than similar habitats, such as the vernal pools of California, is their unpredictability. Many playas exist in quite arid regions, where rainfall patterns are highly isolated and ...
... concentration of playas, many other regions have similar habitats. One reason why these ecosystems have been studied less than similar habitats, such as the vernal pools of California, is their unpredictability. Many playas exist in quite arid regions, where rainfall patterns are highly isolated and ...
Organochlorine compounds in wastewater
... The chemistry of formation of these compounds in kraft pulp bleaching provides little reason to expect that these compounds are formed in hypochlorite bleaching (NCASI 2001). Measurements of treated effluents for dioxins and furans at mills in the 1990s showed 2,3,7,8-TCDD to be below analytical min ...
... The chemistry of formation of these compounds in kraft pulp bleaching provides little reason to expect that these compounds are formed in hypochlorite bleaching (NCASI 2001). Measurements of treated effluents for dioxins and furans at mills in the 1990s showed 2,3,7,8-TCDD to be below analytical min ...
Graywater safety
... products are used in the home and if the products are used often. Also, any treatment of the graywater and the length of time it is stored before application will influence its levels of suspended solids, nutrients, bacteria, viruses, and odor. When homeowners use graywater for landscape irrigation, ...
... products are used in the home and if the products are used often. Also, any treatment of the graywater and the length of time it is stored before application will influence its levels of suspended solids, nutrients, bacteria, viruses, and odor. When homeowners use graywater for landscape irrigation, ...
Carp (Cyprinus carpio L.) impacts and recruitment in Australian
... modifications in these large wetlands create some of the most important Carp recruitment hot spots, it would be very difficult to capture (e.g., with a Williams trap) and remove Carp effectively along their main dispersal routes, because such wetlands flood over very large and low relief areas often ...
... modifications in these large wetlands create some of the most important Carp recruitment hot spots, it would be very difficult to capture (e.g., with a Williams trap) and remove Carp effectively along their main dispersal routes, because such wetlands flood over very large and low relief areas often ...
NH4 ratio and the nitrogen loading rate on the stability of ANAMMOX
... application of the anammox process. Neither the mechanism by which it occurs nor the conditions under which nitrite affects the performance of continuous bioreactors, have been elucidated. The performance of three upflow anammox reactors fed with synthetic wastewaters containing the same NO2- concen ...
... application of the anammox process. Neither the mechanism by which it occurs nor the conditions under which nitrite affects the performance of continuous bioreactors, have been elucidated. The performance of three upflow anammox reactors fed with synthetic wastewaters containing the same NO2- concen ...
nitrogen - National Atmospheric Deposition Program
... DEPOSITION? Depending on the chemical form and amount in the environment, nitrogen can serve as a nutrient, enhancing growth and productivity, or as a toxin, causing ecological damage or harming human health. Scientists often refer to N as a macronutrient because plants and animals require it in rel ...
... DEPOSITION? Depending on the chemical form and amount in the environment, nitrogen can serve as a nutrient, enhancing growth and productivity, or as a toxin, causing ecological damage or harming human health. Scientists often refer to N as a macronutrient because plants and animals require it in rel ...
Ammonia removal from wastewater by ion exchange in
... r 2003 Elsevier Science Ltd. All rights reserved. Keywords: Ion-exchange; Ammonia removal; Clinoptilolite; Zeolites; Equilibria ...
... r 2003 Elsevier Science Ltd. All rights reserved. Keywords: Ion-exchange; Ammonia removal; Clinoptilolite; Zeolites; Equilibria ...
Surveys of Species at Risk and their Associated Habitats in the
... Wetlands and riparian areas are essential to a multitude of wildlife species. These fragile and ecologically important ecosystems are also among those most affected by dam construction and hydro operations. On the Sunshine Coast, the installation of BC Hydro’s Clowhom Dam in the 1950s flooded two ex ...
... Wetlands and riparian areas are essential to a multitude of wildlife species. These fragile and ecologically important ecosystems are also among those most affected by dam construction and hydro operations. On the Sunshine Coast, the installation of BC Hydro’s Clowhom Dam in the 1950s flooded two ex ...
Handbook for Azospirillum
... such as maize (2.5 Gb), oat (11.4 Gb), and wheat (16 Gb), even though some are undergoing sequencing procedures, are unlikely to be understood in detail for some time. Green microalgae, on the other hand, have the smallest plant genome (~40 Mb). Chlorella spp. (Chlorophyceae) are simple, nonmotile, ...
... such as maize (2.5 Gb), oat (11.4 Gb), and wheat (16 Gb), even though some are undergoing sequencing procedures, are unlikely to be understood in detail for some time. Green microalgae, on the other hand, have the smallest plant genome (~40 Mb). Chlorella spp. (Chlorophyceae) are simple, nonmotile, ...
Managing Large Woody Debris in Waterways
... whether access to the bank by machinery may be needed in the future, whether single objects or more complex structures would be more appropriate, how much LWD should protrude above the water, and the reduction in flow velocities needed. • A range of debris sizes should be used to promote habitat div ...
... whether access to the bank by machinery may be needed in the future, whether single objects or more complex structures would be more appropriate, how much LWD should protrude above the water, and the reduction in flow velocities needed. • A range of debris sizes should be used to promote habitat div ...
Nitrogen Fixation by Legumes - Soil, Crop and More Information
... Legume nitrogen fixation starts with the formation of a nodule. A common soil bacterium, Rhizobium, invades the root and multiplies within the cortex cells. The plant supplies all the necessary nutrients and energy for the bacteria. Within a week after infection, small nodules are visible with the n ...
... Legume nitrogen fixation starts with the formation of a nodule. A common soil bacterium, Rhizobium, invades the root and multiplies within the cortex cells. The plant supplies all the necessary nutrients and energy for the bacteria. Within a week after infection, small nodules are visible with the n ...
The Exploratory Study on Sulfide Removal Ability of Sulfur-
... greener because of its low operation costs, absence of secondary pollutants and emission of lower amounts of environmentally unfriendly gases compared to other methods [4]. Bio-filtration was investigated for this application. This method uses microorganisms living in a support matrix to degrade the ...
... greener because of its low operation costs, absence of secondary pollutants and emission of lower amounts of environmentally unfriendly gases compared to other methods [4]. Bio-filtration was investigated for this application. This method uses microorganisms living in a support matrix to degrade the ...
AN ABSTRACT OF THE THESIS OF
... fragmentation because of agricultural practices (USDI, 1994). Restoration and conservation efforts in the Central Valley, especially for threatened and endangered species, will need to consider agricultural land use in order to succeed. A prime example is conservation planning for the threatened Gia ...
... fragmentation because of agricultural practices (USDI, 1994). Restoration and conservation efforts in the Central Valley, especially for threatened and endangered species, will need to consider agricultural land use in order to succeed. A prime example is conservation planning for the threatened Gia ...
A GIS–based Distributed Parameter Model for Rainfall Runoff
... pattern, initial soil moisture, tillage practice, physical soil properties and densities of vegetation roots and stems. Factors of surface roughness, surface storage, slope, size of watershed overland flow area, as well as rate of precipitation have also been taken into account in the model (Mack, 1 ...
... pattern, initial soil moisture, tillage practice, physical soil properties and densities of vegetation roots and stems. Factors of surface roughness, surface storage, slope, size of watershed overland flow area, as well as rate of precipitation have also been taken into account in the model (Mack, 1 ...
West Eugene Wetlands RMP Scoping Report
... coordination in the development of this RMP. The BLM mailed scoping letters to the tribes providing information about the planning process and the planning area and inviting their involvement. None of the tribes provided any comments during the formal scoping period. In addition, the BLM teleph ...
... coordination in the development of this RMP. The BLM mailed scoping letters to the tribes providing information about the planning process and the planning area and inviting their involvement. None of the tribes provided any comments during the formal scoping period. In addition, the BLM teleph ...
Removal of Organic Pollutants in the Municipal Sewage Water by
... dishwashers, kitchen, etc.) and sanitary or black water (from toilets). Frequently, one can use the term sewage meaning the municipal wastewater that consists of a broad range of contaminants resulting from the combination of wastewaters from various sources. Occasionally, ...
... dishwashers, kitchen, etc.) and sanitary or black water (from toilets). Frequently, one can use the term sewage meaning the municipal wastewater that consists of a broad range of contaminants resulting from the combination of wastewaters from various sources. Occasionally, ...
Constructed wetland
A constructed wetland (CW) is an artificial wetland created for the purpose of treating anthropogenic discharge such as municipal or industrial wastewater, stormwater runoff. It may also be created for land reclamation after mining, refineries, or other ecological disturbances such as required mitigation for natural areas lost to a development.Constructed wetlands are engineered systems that use natural functions of vegetation, soil, and organisms to treat different water streams. Depending on the type of wastewater that has to be treated the system has to be adjusted accordingly which means that pre- or post-treatments might be necessary.Constructed wetlands can be designed to emulate the features of natural wetlands, such as acting as a biofilter or removing sediments and pollutants such as heavy metals from the water. Some constructed wetlands may also serve as a habitat for native and migratory wildlife, although that is usually not their main purpose.The two main types of constructed wetlands are subsurface flow and surface flow wetlands. The planted vegetation plays a role in contaminant removal but the filter bed, consisting usually of a combination of sand and gravel, has an equally important role to play.