نتایج جستجو برای: lagoons
تعداد نتایج: 1376 فیلتر نتایج به سال:
Although anaerobic lagoons are used globally for livestock waste treatment, their detailed microbial cycling ofN is only beginning to become understood. Within this cycling, nitrification can be performed by organisms that produce the enzyme ammonia monooxygenase. For denitrification, the reduction of nitrite to nitric oxide can be catalyzed by two forms of nitrite reductases, and N,O can be re...
The 1977 Clean Water Amendments to Public Law 92-500 were enacted to ~strengthen the ori@nalpolicy of encouraging the utilization ofinnovative, alternative management techniques far the treatment and disposal of municipal wastewater. These alternative techniquesinclude spmy krigation and overland flow land treatment systems which can be used individual& cr combined with lagoons. The lagoons ser...
The Mundaú-Manguaba Estuary Lagoon Complex is located on the coast of Alagoas state in Northeastern Brazil, and consists two shallow lagoons, Mundaú Manguaba, that form a system choked lagoons which are connected to Atlantic Ocean by series narrow channels with single outlet dynamically alters its position. This study uses Hydrodynamic Environmental System, SisBaHiA® investigate how variations ...
The concentrations of metals, Cd, Cu, Fe, Mn, Ni, Pb, and Zn were determined in some lagoons to establish the level of metal pollution. The lagoons studied were Alvarado lagoon, Veracruz; San Andres lagoon, Tamaulipas; and Terminos lagoon, Campeche. The concentrations were determined in water, oyster (Crassostrea virginica), and sediments. Metals were accumulated in either oysters or sediments....
A workshop organized in French Polynesia in November 2004 allowed reviewing the current methods to model the three-dimensional hydrodynamic circulation in semi-enclosed atoll lagoons for aquaculture applications. Mollusk (e.g. pearl oyster, clam) aquaculture is a major source of income for South Pacific countries such as French Polynesia or Cook Islands. This aquaculture now requires a better u...
There is a need for treatment technologies that can effectively address environmental concerns associated with anaerobic lagoons typically used to manage manure. These technologies must be able to capture nutrients, kill pathogens, and reduce emissions of ammonia (NH ) and nuisance odors. To meet these needs, a wastewater treatment plant was demonstrated at full-scale in one of two 4,360-pig pr...
Lagoons are habitat islands in the coastal landscapes characterised by both among ecosystems 1 heterogeneity, due to different terrestrial-freshwater, freshwater-marine interfaces, and within ecosystem heterogeneity, due patchy spatial and temporal distribution of biotic and abiotic
Temporal coherence (i.e., the degree of synchronicity of a given variable among ecological units within a predefined space) has been shown for several limnological features among temperate lakes, allowing predictions about the structure and function of ecosystems. However, there is little evidence of temporal coherence among tropical aquatic systems, where the climatic variability among seasons...
conducted in the 1980s, is estimated to run to £15 billion. The UK government's Sustainable Development Commission (SDC) estimates that this facility could save 5.6 Mt carbon dioxide per year, in comparison to new-built gas-fired power plants. The carbon footprint of building the barrage would be paid back in 5–8 months, according to the SDC. The concept is based on proven technology, as a simi...
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