### substance | waste:

Wastewater
* Most wastewater consists of domestic sewage
* Some wastewater enters coastal oceans
* acts as a fertilizer in aquaculture to feed the plankton that the fish thrive on.
* adds to the surface sheet flow.
* affects surface water quality and habitats and requires energy to treat.
* can also contain dirt and pollutants from vehicles and equipment washing.
* combination of household wastes from the kitchen, toilet, shower and laundry.
* comes from our homes, local factories, businesses, and industries.
* complex mixture of mineral and organic matter.
* containing ammonia is circulated on the outside of the fibers.
* contains disease-causing pathogens
  - high amounts of salts that can easily kill plants
  - nitrogen and phosphates that, being fertilizers, encourage the growth of algae
  - several undesirable pollutants
* flows and design of sewers
  - by gravity until there is no longer enough slope in the pipe to maintain flow
* flows through a series of biological cells kept in individual tanks
  - an extensive network of underground pipes into wastewater treatment plants
  - the filter bed where suspended solids are entrapped
  - to treatment plants from homes, businesses, and industries
* has extremely large numbers of water borne bacteria and pathogens.
* includes basic household waste coming from sinks, toilets, or washing machines
  - wastewater treatment, sewage lines, and sewer rehabilitation
* is aerated to improve treatment by biooxidation
  - also nutrient rich
  - basically more water than any other substance
  - batch or continuously fed into an evaporator
  - collected by an extensive underground sewer system
  - comprised mostly of human waste, which contains bacteria and viruses
  - generated by homes, industry, schools, and businesses
  - held in a lagoon or tank until most solids in it settle out
  - largely the communities water supply after it has been fouled by various uses
  - pumped into aerated concentric channels
  - recycled to be used to recover waste from swine buildings
  - sewage and storm water
  - simply the used water that goes down indoor drains
  - sprayed over rocks or other solid support material covered with microorganisms
  - stored when river-flow is at maximum
* is the flow of used water from a community
  - spent water of the community
* is treated and recycled
  - with pure oxygen and disinfected with ozone
* problem in many communities.
* tends to be warm, acidic and laden with metals and other inorganic compounds.

### substance | waste | wastewater:

Domestic wastewater
* is generated from residential, commercial, institutional and public buildings
  - treated and used for underground irrigation of landscaping
  - water from our sinks, toilets and washing machines
* refers to liquid wastes from kitchen and bathrooms.

Municipal wastewater
* All municipal wastewater contains some level of mercury.
* consists primarily of domestic waste from households.
* general term applied to any liquid treated in a municipal treatment plant.
* is composed of a variety of substances
  - discharged into rivers and lakes without treatment
  - the waste stream from a municipality

Treated wastewater
* is discharged into surface water systems such as lakes, rivers and oceans
  - seen as an integral part of the water resources of the country
  - usually very high in nitrogen and phosphorus, the major plant nutrients
* point source of the nutrient phosphorus.

Waxy substance
* Most waxy substances build up in arteries.
* clog arteries.

Weld material
* Most weld materials are alloys or mixtures of several constituents.
* penetrates the mold surface without heat, distortion, shrinkage, or metal stress.