Natural History. A member of the weasel family, the sea otter is the smallest marine mammal in North America. The southern, or California, sea otter ranges along the coast from San Mateo County southward through Monterey County and down to Santa Barbara County.Unlike other marine mammals, sea otters don't have a thick layer of blubber. member of the weasel family, the sea otter is the smallest marine mammal in North America. The southern, or California, sea otter ranges along the coast from San Mateo County southward through Monterey County and down to Santa Barbara County. Unlike other marine mammals, sea otters don't have a thick layer of blubber.
In modern plumbing, a drain-waste-vent (or DWV) is part of a system that removes sewage and greywater from a building, and regulates air pressure in the waste-system pipes to aid free flow.t the building drain system's lowest point, the drain-waste vent is attached, and rises (usually inside a wall) to and out of the roof. Waste exits from the building through the building's main drain and flows through a sewage line, which leads to a septic system or a public sewer.
Zero Liquid Discharge (ZLD) ZLD is a term used to describe a method of opera-tion that results in the elimination of liquid wastes leaving a water treatment plant. In a conventional surface or groundwater treatment plant, the principal liquid waste is the filter backwash.here are three general types of equip-ment for a brine ZLD system: â¢ B rine concentrator â Also known as a brine evaporator. The concentrator reduces the original brine volume by 95 to 98 percent, and effluent is a two-phase solution â a high TDS liquid and crystalline salt particles.