arcata marsh wastewater treatment
In 1979, the state authorized a two-year pilot project of a 10 cell marsh to treat 10 percent of Arcata’s wastewater with plants and sunlight, with the goal of demonstrating … The natural processes reduce reliance on chemicals. The Arcata Marsh and Wildlife Sanctuary was dedicated July 4, 1981. Wastewater flows from the Oxidation ponds to the Treatment Wetlands for filtration and continues onwards to Chlorination and the Arcata Enhancement Marshes as seen in Figure 2. The Arcata wastewater treatment center and the marsh are the result of science and engineering that ... the city was granted the permission to use the marsh as part of the treatment of wastewater. Solids removed in the primary clarifier are treated in anaerobic digesters and solids drying beds. Algae die and settle to the bottom of the marsh, where the solids are digested anaerobically. Additional oxygen is supplied mechanically by machines called aerators at times when the City wants to increase oxygen and circulation in the pond.
Arcata's Treatment Wetlands serve as an effective means of treating wastewater by removing harmful constituents. The time it takes for the water to travel through the enhancement wetlands results in nutrient and suspended solids reduction, with the added benefit of providing habitat for wildlife.After the wastewater flows through the enhancement marshes, it is currently pumped back to the chlorine contact basin (Step 7), where it is chlorinated and de-chlorinated before it is discharged into Humboldt Bay. Volunteer docents give tours of the marsh. Currently the system uses chlorine to disinfect and sulfur dioxide to remove the chlorine at two points in the system – before flowing to the enhancement wetlands (Step 8), and before discharge to Humboldt Bay (Step 9). Treatment occurs naturally, by allowing the time for plants, algae and bacteria to break down the waste products. Two Archimedes screw pumps lift the sewage 15 feet. The City of Arcata proposes to construct upgrades to the existing Arcata Wastewater Treatment Facility (Treatment Facility, or Facility) to update aging infrastructure and comply with the requirements of the Regional Water Quality Control Board (RWQCB) Order No. We were founded in 1989 with the initial task of raising funds to build an interpretive center at the Arcata Marsh and Wildlife Sanctuary, but since then have been responsible for educating the public about the Arcata Marsh.
Humboldt State … It gravity-flows through a screen to remove sticks, debris, sand, gravel, and other gritty materials, which are taken to a landfill. The Arcata Prairie was the site of several Wiyot villages and was called Goal-la-nah meaning a land a little above water. Education programs are offered for school, scout and other groups, as well as summer camp programs. After raw sewage enters, sludge is separated from the effluent. Ongoing preventative maintenance has kept the original treatment plant in operation but there has been little replacement of equipment or structures since original construction, and minimal maintenance in the natural treatment system. The dried sludge is mixed with chipped wood waste and plants harvested from the enhancement marshes. Some sludge ingredients are converted into methane, which is used to heat the digesters.Digested sludge, which has the consistency of pudding, is drained from digesters to covered drying beds and dried in the open air. The treatment system serves a population of 16,000, as wastewater flows through a series of ingeniously constructed ponds and wetlands. The conventional sedimentation, filtering and chlorine treatments are given.
In the oxidation ponds algae powered by the sun creates OThe surface of the Treatment Wetlands are covered with aquatic plants, like After the wastewater completes its two day journey it continues onward to the Treatment Wetlands are being implemented across the world: Our members and volunteers are eager to tell you about the wonderful Arcata Marsh. Please join us in protecting and preserving this local wildlife sanctuary and recreation area.Raising Awareness of Wetlands, Wildlife & Wastewater Treatment Another outcome of the engineering redesign is that the discharge location will move to an area adjacent to and connected to the recently restored McDaniel Slough tidal wetlands.
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