The existence of human in the current century is under threat because of the wanton destruction of natural ecosystems. This study provides some of the reasons as to why it is essential for the environment to be protected from possible damage from human activities. Some of these activities are essential and beneficial especially when treated wastes are released to a community.
Social Ecology of Health Promotion
Preservation of the existing ecosystems
Accumulating evidence suggest that sustainable agriculture should be promoted. The growth and development of agriculture will still be the driving force of the loss of ecosystems in the 21st century. In specified areas, the growth and development of agriculture poses a danger to ecosystems, establishment, evaluation, and technological diffusion. This could see the rise of the food production sustainably per unit area with the absence of trade-offs relating to excessive water consumption or nutrients and pesticides use, would lessen pressure significantly to ecosystems. For many cases, the required technologies are in place, and they could be implemented in a wider variety, but the nation is facing financial constraints and lacking intuitional capabilities to use and gain the stated technologies. In areas where technology is predominant of the landscape, maintenance of ecosystems within the landscape is a very significant constitute of the total efforts of conservation of the ecosystem, and in case they are well and properly managed, can also play a role in productivity of agriculture and ecosystem services sustainability which is provided for by biodiversity. For example, through control of pest, removing the excess nutrients, preventing the watercourses from soil erosion, soil fertility, and pollination (Scutchfield & Keck, 2009).
Benefits and limitations of the support for primary, secondary, and tertiary sewage treatments in your community
Treatment of primary water waste is a reference for the process of sedimentation and physical treatment instituted for removal of suspended solids settled from the wastewater. A sedimentation basin typically circular has a cross-section that is the left, displays the overall solids and liquids flow pattern. The influent flows of water waste at the core of the sedimentation basin (clarifier). As the flow is directed from the clarifier circumference to the weir effluent, the solids are resolved out towards the outlet solids and are scraped. At the right side, a primary sedimentation basin in the circular sedimentation basin of the plant of water waste treatment exists (Hayden 2009).
The secondary process of water treatment is the removal of organic (biological, once living) waste material from wastewater, using a typical process of biological treatment. This method of treatment for of biological wastewater is popular and commonly used. Methods under this category include system stabilization and pond treatment, trickling filter, and activated sludge. Each of the above methods, work by combining water waste organic matter, dissolved oxygen and aerobic microorganisms. Biological water waste organic oxidation takes a position in the system of wastewater treatment naturally instead of in the river, stream of the lake, the way it would have in case the waste organic matter was to be dumped there. The biological process of treatment for the trickling filter that uses a base of rocks to allow for contact of the oxygen, aerobic bacteria and water waste organic matter (Stephens 2008).
Advanced treatment of water waste is instituted in a scenario where defined components of soft wastewater is removed using the secondary treatment process. Individual processes of treatment are mandatory for removal of phosphorous, nitrogen, dissolved solids, heavy metals, refractory organics and additional suspended solids. For the reason of advanced treatment often goes after the secondary treatment, in some cases it is termed as tertiary treatment (aeration basins for removal of phosphorous or addition of chemicals to the primary sedimentation basins) or substitute for secondary treatment (overland treatment flow of the primary effluent) (Hayden 2009).
Adapting the process of activated sludge is in most cases for removal of phosphorous and nitrogen and a good example is this method is the treatment plan 23Ml/d that was commissioned in the year 1982, in British Columbia, Canada (1987 World Water). Wastewater from primary sedimentation basins flows to the biological reactor that is divided physical into five different zones by weirs and baffles. These zones include:
1. Zone aerobic fermentation (featured by low levels of dissolved oxygen and nitrates absence
2. Zone anoxic (low levels of dissolved oxygen and presence of nitrates)
3. Zone aerobic (aerated)
4. Secondary anoxic zone and
5. Final aeration zone
The purpose of the first zone is conditioning the group of bacteria responsible for the removal of phosphorous by stressing them under conditions of low oxidation-reduction, which gives an outcome of phosphorous release equilibrium in the bacteria's cell. On exposure that is subsequent to enough supply of phosphorous and oxygen in the zones that are aerated, these cells accumulate rapidly phosphorous in a considerable manner in excess for the required metabolic requirements. Phosphorous is evicted from the system together with the waste activated sludge (Hayden 2009).
The concept of synergism and how it impacts environmental health problems
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