![\"\"](\"https:\/\/i0.wp.com\/www.hoffmancorp.com\/images\/profile\/Brightwater%20Treatment%20Plant\/BrightwaterTreatmentPlant_1.jpg?resize=610%2C329\")
<\/p>\nA small but energetic group of SAWE members and guests toured the Brightwater Waste treatment plant in Woodinville, Wa.\u00a0 This the a brand new plant and is one of 3 facilities that treats all of the waters in the Greater Seattle area.\u00a0 We had a custom tour from Casey Plank of the Brightwater engineering team.<\/p>\n
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The plant design integrates landscape, architecture, wildlife habitat, engineering, art, and education.<\/p>\n
Casey walked us around the grounds, first describing the waste treatment process, then showing us the facilities of each process<\/p>\n
Preliminary treatment removes large objects from the untreated wastewater (influent) as it enters the treatment plant. The equipment includes screens for removing debris and grit facilities for removing sand, gravel and other inorganic matter. The screening and grit removal\u00a0equipment will be covered and vented for odor control.<\/p>\n
Primary treatment is the process where most of the suspended solids settle out of the wastewater. The conventional primary system consists of rectangular clarifier units equipped with collection systems on the top and bottom. Most of the flows coming into the plant wil be treated here. As with the preliminary process, the primary clarifiers will be covered and the air will be vented to an odor control system.<\/p>\n
Secondary treatment is the process where soluble and fine suspended dissolved materials not already removed at primary treatment are removed. As an alternative to conventional secondary processes (knows as conventional activated sludge), the Brightwater project will use Membrane Bioreactor (MBR) technology.<\/p>\n
During times of high flows, flows above a certain design threshold will be split off after preliminary treatment, processed using an enhanced primary treatment and recombined with MBR effluent for disinfection and discharge to Puget Sound. As with the MBR effluent, this combined effluent also provides substantially better effluent quality than conventional secondary treatment.<\/p>\n
The purpose of disinfection is to kill remaining pathogens in the effluent to a level that complies with water quality discharge permits. At Brightwater sodium hypochlorite will be used for disinfection.<\/p>\n
King County is committed to operating Brightwater with no detectable odors. Stringent design and performance criteria have been established for odor prevention at the facility. All treatment facilities will be covered, including the influent wet well, screening and grit handling, primary clarifiers, aeration basins, membrane tanks, and disinfection. The headworks and\u00a0solids handling equipment will also be fully enclosed.<\/p>\n
Air\u00a0is collected from these enclosed areas and\u00a0is then routed to the odor control systems. This air is then treated by multistage chemical and biological scrubbers, followed by a final polishing stage of carbon adsorption. Each stage treats the process air to a greater degree.<\/p>\n
Washington state identifies standards for four classes of reclaimed water, with Class A being the highest. Class A reclaimed water can be safely used for many purposes that do not require drinking water, such as industrial processes; irrigation of edible crops, gardens and landscaping; and irrigation of public areas such as parks and recreational fields.<\/p>\n
When it comes online, Brightwater will produce about 7 million gallons of Class A reclaimed water each day for off-site uses, and eventually up to 21 million gallons per day as demand requires. The reclaimed water will also be used on-site for irrigation, tank cleaning, and other processes that do not require potable water.<\/p>\n
Learn\u00a0more about\u00a0Brightwater reclaimed water construction<\/a> and about the county\u2019s reclaimed water program<\/a>.<\/p>\n Biosolids are the nutrient-rich organic material produced by treating wastewater solids. After processing and treatment, they can be beneficially recycled as a fertilizer and soil amendment. King County has been safely recycling biosolids for more than 25 years. In 2002, 27,000 dry tons of biosolids from the county\u2019s two regional treatment plants were used for agriculture and forestry applications, and a portion was composted for use in landscaping and gardening.<\/p>\n Biosolids production will include thickening, anaerobic digestion and dewatering of the wastewater solids. The stabilized, dewatered biosolids will then\u00a0be hauled offsite and beneficially used along with biosolids from the West Point and South Treatment lants. The biosolids facilities will have odor control systems.<\/p>\n","protected":false},"excerpt":{"rendered":" A small but energetic group of SAWE members and guests toured the Brightwater Waste treatment plant in Woodinville, Wa.\u00a0 This the a brand new plant and is one of 3 facilities that treats all of the waters in the Greater Seattle area.\u00a0 We had a custom tour from Casey Plank of the Brightwater engineering team. […]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[3],"tags":[],"class_list":["post-41","post","type-post","status-publish","format-standard","hentry","category-events"],"jetpack_featured_media_url":"","jetpack-related-posts":[{"id":10,"url":"https:\/\/sawe.org\/chapters\/seattle\/2013\/01\/04\/washington-state-welcomes-bmw\/","url_meta":{"origin":41,"position":0},"title":"Washington State welcomes BMW","author":"ryan","date":"January 4, 2013","format":false,"excerpt":"BMW announced last week that its\u00a0Megacity Vehicle will launch in markets in 2013. The Megacity Vehicle will be a zero-emission urban vehicle and will use extensive amounts of carbon fiber to reduce weight. The German automaker also plans to use carbon fiber across its lineup. \u201cWe will be the first\u2026","rel":"","context":"In "Industry News"","block_context":{"text":"Industry News","link":"https:\/\/sawe.org\/chapters\/seattle\/category\/industry-news\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":15,"url":"https:\/\/sawe.org\/chapters\/seattle\/2013\/01\/04\/montlake-bridge-tour\/","url_meta":{"origin":41,"position":1},"title":"Montlake Bridge Tour","author":"ryan","date":"January 4, 2013","format":false,"excerpt":"On Friday, June 11th 2011, the Seattle Chapter took a tour of the Montlake Bridge (map) near the University of Washington campus. A bridge may not seem like it is very dependent upon mass properties or weight engineering, but the Montlake Bridge is a double-leaf bascule bridge. A bascule (a\u2026","rel":"","context":"In "Events"","block_context":{"text":"Events","link":"https:\/\/sawe.org\/chapters\/seattle\/category\/events\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":63,"url":"https:\/\/sawe.org\/chapters\/seattle\/2013\/03\/17\/museum-of-flight\/","url_meta":{"origin":41,"position":2},"title":"Museum of Flight","author":"ed","date":"March 17, 2013","format":false,"excerpt":"On September 6th 2012, the Seattle Chapter SAWE visited the Museum of Flight in Seattle Washington. Henry Geijsebeek from Weight Engineering was the docent for the tour.\u00a0 Henry has led tours at the Museum of Flight before and he educated and entertained the SAWE group.","rel":"","context":"In "Events"","block_context":{"text":"Events","link":"https:\/\/sawe.org\/chapters\/seattle\/category\/events\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":95,"url":"https:\/\/sawe.org\/chapters\/seattle\/2013\/04\/15\/seattle-chapter-contacts-and-officiers\/","url_meta":{"origin":41,"position":3},"title":"Seattle Chapter Contacts and Officiers","author":"ed","date":"April 15, 2013","format":false,"excerpt":"Congratulations to the new local Chapter Officers: President\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Liz Cercado (elizabeth.cercado@boeing.com) Vice President\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Gabriel Rego (gabriel.c.rego@boeing.com) Sec\/Treasurer\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Tara Yeager (tara.k.yeager@boeing.com) Director\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Casey Regan (casey.c.regan@boeing.com) Outgoing officers\u00a0Rob Gilchrist and\u00a0Pat Mitchell are taking positions at SAWE at the international level.\u00a0 Rob, Pat and myself (Ed Davis) will all continue to be active in the local\u2026","rel":"","context":"In "Education"","block_context":{"text":"Education","link":"https:\/\/sawe.org\/chapters\/seattle\/category\/education\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":31,"url":"https:\/\/sawe.org\/chapters\/seattle\/2013\/01\/04\/boeing-and-university-of-washington\/","url_meta":{"origin":41,"position":4},"title":"Boeing and University of Washington","author":"ryan","date":"January 4, 2013","format":false,"excerpt":"On December 4, The Boeing Company took another step in its transition from metal to composite structures. Addressing the critical training challenge posed by aircraft composites, the materials used to build the 787 Dreamliner, it honored more than 80 engineers and technical professionals at a graduation ceremony for the University\u2026","rel":"","context":"In "Education"","block_context":{"text":"Education","link":"https:\/\/sawe.org\/chapters\/seattle\/category\/education\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":35,"url":"https:\/\/sawe.org\/chapters\/seattle\/2013\/01\/05\/flying-heritage-collection-tour\/","url_meta":{"origin":41,"position":5},"title":"Flying Heritage Collection Tour","author":"ryan","date":"January 5, 2013","format":false,"excerpt":"We have begun our \u201c2012 SAWE Tour\u201d. Our first stop was at the Flying Heritage Collection (FHC). See their website\u00a0on March 27th, 2012. Located at Paine Field, Everett, the FHC is a remarkable collection of airplanes. The collection belongs to Microsoft\u2019s Paul Allen and consists of flying examples of some\u2026","rel":"","context":"In "Events"","block_context":{"text":"Events","link":"https:\/\/sawe.org\/chapters\/seattle\/category\/events\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/sawe.org\/chapters\/seattle\/wp-json\/wp\/v2\/posts\/41","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sawe.org\/chapters\/seattle\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sawe.org\/chapters\/seattle\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sawe.org\/chapters\/seattle\/wp-json\/wp\/v2\/users\/12"}],"replies":[{"embeddable":true,"href":"https:\/\/sawe.org\/chapters\/seattle\/wp-json\/wp\/v2\/comments?post=41"}],"version-history":[{"count":0,"href":"https:\/\/sawe.org\/chapters\/seattle\/wp-json\/wp\/v2\/posts\/41\/revisions"}],"wp:attachment":[{"href":"https:\/\/sawe.org\/chapters\/seattle\/wp-json\/wp\/v2\/media?parent=41"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sawe.org\/chapters\/seattle\/wp-json\/wp\/v2\/categories?post=41"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sawe.org\/chapters\/seattle\/wp-json\/wp\/v2\/tags?post=41"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Biosolids<\/h2>\n