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Decentralized Wastewater System
Decentralized wastewater systems (also referred to as decentralized wastewater treatment systems) convey, treat and dispose or reuse wastewater from small and low-density communities, buildings and dwellings in remote areas, individual public or private properties. Wastewater flow is generated when appropriate water supply is available within the buildings or close to them. Decentralized wastewater systems treat, reuse or dispose the effluent in relatively close vicinity to its source of generation. They have the purpose to protect public health and the natural environment by reducing substantially health and environmental hazards. They are also referred as "decentralized wastewater treatment systems" because the main technical challenge is the adequate choice of a treatment and/or disposal facility. A commonly used acronym for decentralized wastewater treatment system, is DEWATS. Background Comparison to centralized systems Centralized wastewater systems are the most widel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Constructed Wetland (5268650754)
A constructed wetland is an artificial wetland to treat sewage, greywater, stormwater runoff or Industrial wastewater treatment, industrial wastewater. It may also be designed for land reclamation after mining, or as a Flood mitigation, mitigation step for natural areas lost to land development. Constructed wetlands are engineered systems that use the natural functions of vegetation, soil, and organisms to provide secondary treatment to wastewater. The design of the constructed wetland has to be adjusted according to the type of wastewater to be treated. Constructed wetlands have been used in both centralized and decentralized wastewater systems. Primary treatment is recommended when there is a large amount of suspended solids or soluble organic matter (measured as biochemical oxygen demand and chemical oxygen demand). Similar to natural wetlands, constructed wetlands also act as a biofilter and/or can remove a range of pollutants (such as organic matter, Nutrient pollution, nutri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Biogas Digester At Meru Prison (3504698658)
Biogas is a gaseous renewable energy source produced from raw materials such as agricultural waste, manure, municipal waste, plant material, sewage, green waste, wastewater, and food waste. Biogas is produced by anaerobic digestion with anaerobic organisms or methanogens inside an anaerobic digester, biodigester or a bioreactor. The gas composition is primarily methane () and carbon dioxide () and may have small amounts of hydrogen sulfide (), moisture and siloxanes. The methane can be combusted or oxidized with oxygen. This energy release allows biogas to be used as a fuel; it can be used in fuel cells and for heating purpose, such as in cooking. It can also be used in a gas engine to convert the energy in the gas into electricity and heat. After removal of carbon dioxide and hydrogen sulfide it can be compressed in the same way as natural gas and used to power motor vehicles. In the United Kingdom, for example, biogas is estimated to have the potential to replace around 17% ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Infrastructure
Infrastructure is the set of facilities and systems that serve a country, city, or other area, and encompasses the services and facilities necessary for its economy, households and firms to function. Infrastructure is composed of public and private physical structures such as roads, railways, bridges, airports, public transit systems, tunnels, water supply, sewers, electrical grids, and telecommunications (including Internet connectivity and broadband access). In general, infrastructure has been defined as "the physical components of interrelated systems providing commodities and services essential to enable, sustain, or enhance societal living conditions" and maintain the surrounding environment. Especially in light of the massive societal transformations needed to mitigate and adapt to climate change, contemporary infrastructure conversations frequently focus on sustainable development and green infrastructure. Acknowledging this importance, the international co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Local Authorities
Local government is a generic term for the lowest tiers of governance or public administration within a particular sovereign state. Local governments typically constitute a subdivision of a higher-level political or administrative unit, such as a nation or state. Local governments generally act within the powers and functions assigned to them by law or directives of a higher level of government. In federal states, local government generally comprises a third or fourth level of government, whereas in unitary states, local government usually occupies the second or third level of government. The institutions of local government vary greatly between countries, and even where similar arrangements exist, country-specific terminology often varies. Common designated names for different types of local government entities include counties, districts, cities, townships, towns, boroughs, parishes, municipalities, municipal corporations, shires, villages, and local government areas. The sa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Local Ordinance
A local ordinance is a law issued by a local government such as a municipality, county, parish, prefecture, or the like. Hong Kong In Hong Kong, all laws enacted by the territory's Legislative Council remain to be known as ''Ordinances'' () after the transfer of the territory's sovereignty to China in 1997. Germany The German Constitution grants the federated states certain exclusive rights including police and public order powers. The 16 state governments delegate many of their responsibilities and powers to local authorities. Local authorities have powers to pass local ordinances () e.g. to determine the use of land, planning questions, public order, emergency and transport issues etc. The ordinance must follow a public disclosure and consultation procedure and then approved by the local assembly as well as the elected representative of the executive (e.g. the mayor). The state authorities or stakeholders, including citizens who can show that they have a sufficiently st ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guideline
A guideline is a statement by which to determine a course of action. It aims to streamline particular processes according to a set routine or sound practice. They may be issued by and used by any organization (governmental or private) to make the actions of its employees or divisions more predictable, and presumably of higher quality. A guideline is similar to a rule, but are legally less binding as justified deviations are possible. List of guidelines Examples of guidelines are: * Code of practice * EASE Guidelines for Authors and Translators of Scientific Articles * Federal Sentencing Guidelines * Guidelines for Examination in the European Patent Office * Medical guidelines * Publicly Available Specification A Publicly Available Specification or PAS is a standardization document that closely resembles a formal standard in structure and format but which has a different development model. The objective of a Publicly Available Specification is to speed up ... * Programmi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Legislation
Legislation is the process or result of enrolling, enacting, or promulgating laws by a legislature, parliament, or analogous governing body. Before an item of legislation becomes law it may be known as a bill, and may be broadly referred to as "legislation" while it remains under consideration to distinguish it from other business. Legislation can have many purposes: to regulate, to authorize, to outlaw, to provide (funds), to sanction, to grant, to declare, or to restrict. It may be contrasted with a non-legislative act by an executive or administrative body under the authority of a legislative act. Overview Legislation to design or amend a bill requires identifying a concrete issue in a comprehensive way. When engaging in legislation, drafters and policy-makers must take into consideration the best possible avenues to address problem areas. Possible solutions within bill provisions might involve implementing sanctions, targeting indirect behaviors, authorizing agency ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Regulation And Monitoring Of Pollution
To protect the environment (biophysical), environment from the adverse effects of pollution, many nations worldwide have enacted legislation to regulate various types of pollution as well as to mitigate the adverse effects of pollution. At the local level, regulation usually is supervised by Environmental agency, environmental agencies or the broader public health system. Jurisdictions often have different levels Environmental law, regulation and policy choices about pollution. Historically, polluters will lobby governments in less economically developed areas or countries to maintain lax regulation to protect industrialisation at the cost of human and environmental health. The modern environmental regulatory environment has its origins in the United States with the beginning of industrial regulations around Air and Water pollution connected to industry and mining during the 1960s and 1970s. Because many pollutants have transboundary impacts, the UN and other treaty bodies have bee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wastewater Treatment Plants
Wastewater treatment is a process which removes and eliminates contaminants from wastewater. It thus converts it into an effluent that can be returned to the water cycle. Once back in the water cycle, the effluent creates an acceptable impact on the environment. It is also possible to reuse it. This process is called water reclamation. The treatment process takes place in a wastewater treatment plant. There are several kinds of wastewater which are treated at the appropriate type of wastewater treatment plant. For domestic wastewater the treatment plant is called a Sewage Treatment. Municipal wastewater or sewage are other names for domestic wastewater. For industrial wastewater, treatment takes place in a separate Industrial wastewater treatment, or in a sewage treatment plant. In the latter case it usually follows pre-treatment. Further types of wastewater treatment plants include Agricultural wastewater treatment and leachate treatment plants. One common process in wastewater ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stabilization Pond
Waste stabilization ponds (WSPs or stabilization ponds or waste stabilization lagoons) are ponds designed and built for wastewater treatment to reduce the organic content and remove pathogens from wastewater. They are man-made depressions confined by earthen structures. Wastewater or "influent" enters on one side of the waste stabilization pond and exits on the other side as "effluent", after spending several days in the pond, during which treatment processes take place. Waste stabilization ponds are used worldwide for wastewater treatment and are especially suitable for developing countries that have warm climates. They are frequently used to treat sewage and industrial effluents, but may also be used for treatment of municipal run-off or stormwater. The system may consist of a single pond or several ponds in a series, each pond playing a different role in the removal of pollutants. After treatment, the effluent may be returned to surface water or reused as irrigation water (or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Constructed Wetland
A constructed wetland is an artificial wetland to treat sewage, greywater, stormwater runoff or Industrial wastewater treatment, industrial wastewater. It may also be designed for land reclamation after mining, or as a Flood mitigation, mitigation step for natural areas lost to land development. Constructed wetlands are engineered systems that use the natural functions of vegetation, soil, and organisms to provide secondary treatment to wastewater. The design of the constructed wetland has to be adjusted according to the type of wastewater to be treated. Constructed wetlands have been used in both centralized and decentralized wastewater systems. Primary treatment is recommended when there is a large amount of suspended solids or soluble organic matter (measured as biochemical oxygen demand and chemical oxygen demand). Similar to natural wetlands, constructed wetlands also act as a biofilter and/or can remove a range of pollutants (such as organic matter, Nutrient pollution, nutri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Septic Tank
A septic tank is an underground chamber made of concrete, fiberglass, or plastic through which domestic wastewater (sewage) flows for basic sewage treatment. Settling and anaerobic digestion processes reduce solids and organics, but the treatment efficiency is only moderate (referred to as "primary treatment"). Septic tank systems are a type of simple onsite sewage facility. They can be used in areas that are not connected to a sewerage system, such as rural areas. The treated liquid effluent is commonly disposed in a septic drain field, which provides further treatment. Nonetheless, groundwater pollution may occur and is a problem. The term "septic" refers to the Anaerobic digestion, anaerobic bacterial environment that develops in the tank that decomposes or mineralizes the waste discharged into the tank. Septic tanks can be coupled with other Onsite sewage facility, onsite wastewater treatment units such as biofilters or aerobic systems involving artificially forced aeration. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
