Wastewater treatment | Process, History, Importance, Systems ...
Nov 18, 2024 · Also beginning in the 1900s, new sewage-collection systems were designed to separate storm water from domestic wastewater, so that treatment plants did not become overloaded during periods of wet weather.
Wastewater treatment - Sewerage, Pollution, Purification | Britannica
Nov 18, 2024 · Wastewater treatment - Sewerage, Pollution, Purification: A sewerage system, or wastewater collection system, is a network of pipes, pumping stations, and appurtenances that convey sewage from its points of origin to a point of treatment and disposal.
Wastewater treatment - Sedimentation, Filtration, Clarification ...
Nov 18, 2024 · Wastewater treatment - Sedimentation, Filtration, Clarification: Primary treatment removes material that will either float or readily settle out by gravity. It includes the physical processes of screening, comminution, grit removal, and sedimentation.
Wastewater treatment - Sludge, Disposal, Treatment | Britannica
Nov 18, 2024 · Treatment and disposal of sewage sludge are major factors in the design and operation of all wastewater treatment plants. Two basic goals of treating sludge before final disposal are to reduce its volume and to stabilize the organic materials.
Wastewater treatment - Pollutants, Contamination, Purification
Nov 18, 2024 · It is among the most important parameters for the design and operation of sewage treatment plants. Industrial sewage may have BOD levels many times that of domestic sewage. The BOD of storm sewage is of particular concern when it is mixed with domestic sewage in combined sewerage systems (see below).
Wastewater treatment - Cluster, Pollutants, Reuse | Britannica
Nov 18, 2024 · Wastewater treatment - Cluster, Pollutants, Reuse: In certain instances when it is not feasible to connect residences or units to public sewer systems, communities may opt for a clustered wastewater treatment system. Such facilities are smaller versions of centralized treatment plants and serve only a limited number of connections.
Wastewater treatment - Dewatering, Filtration, Disinfection
Nov 18, 2024 · Given that wastewater is rich in nutrients and other chemicals, sewage treatment facilities have gained recognition as resource recovery facilities, overcoming their former reputation as mere pollution mitigation entities. Newer technologies and approaches have continued to improve the efficiency by which energy, nutrients, and other chemicals ...
Wastewater treatment - Flow Rates, Pollutants, Purification
Nov 18, 2024 · Wastewater treatment and disposal. The size and capacity of wastewater treatment systems are determined by the estimated volume of sewage generated from residences, businesses, and industries connected to sewer systems as well as the anticipated inflows and infiltration (I&I).
Wastewater treatment - Oxidation, Pond, Pollutants | Britannica
Nov 18, 2024 · Wastewater treatment - Oxidation, Pond, Pollutants: Oxidation ponds, also called lagoons or stabilization ponds, are large, shallow ponds designed to treat wastewater through the interaction of sunlight, bacteria, and algae. Algae grow using energy from the sun and carbon dioxide and inorganic compounds released by bacteria in water.
Sewer | Design, Maintenance & Repair | Britannica
Sewer, conduit that carries wastewater from its source to a point of treatment and disposal. The wastewater may be domestic (sanitary) sewage, industrial sewage, storm runoff, or a mixture of the three.