8/6/2023 0 Comments Digested organics brewThe treated wastewater meets the municipal sewer surcharge limits of 210 mg/L on BOD and 210 mg/L TSS. Incoming BOD and COD are 6,900 mg/L and 14,600 mg/L respectively, and total suspended solids is 14,600 mg/L. The ACSBR technology is proving exceptionally efficient, he adds. “It is supplying nearly all of the power needed to run the wastewater treatment plant,” says Tom Bachman, Symbiont’s vice-president of sales and marketing. Conditioned biogas also goes to the brewery boilers to heat the brewery, and to the brewery’s wastewater treatment plant boiler to provide heat to the digester. A portion of the biogas is delivered at 90 psi to 200-kW Capstone microturbines power is fed into the grid. The gas is fed into a biogas compression skid (with an emergency flare). Digested effluent flows to a post aeration tank prior to being discharged to the municipal sewer. Wastewater and yeast enter a two-stage anaerobic equalization/hydrolysis tank to maximize biogas production in the ASCBR (second phase). (See “Anaerobic Treatment, Fuel Cell At Brewery,” January 2009 for a description of the digester installed at the company’s first brewery in Chico, CA.) Constructed by Milwaukee-based Symbiont Science Engineering & Construction, the Anaerobic Contact Sequencing Batch Reactor (ACSBR) treats over 220,000 gallons/day of wastewater and yeast (based on production of 700,000 barrels of beer per year). In January 2014, on 190 acres along the French Broad River about 20 minutes from Asheville, Sierra Nevada Brewing inaugurated a LEED Gold two-stage anaerobic digester, an integral part of its brand new East Coast brewery. Mills River, North Carolina: LEED Gold Digester For Sierra Nevada CMSD will also run public service announcements on TV and radio stations and update customers in its quarterly newsletter. CMSD also held four town hall meetings and plans to involve the public in three more to communicate the changes and answer any questions before the new program starts. A survey of 1,000 customers indicated that 41.4 percent of customers would be willing to pay more for collection services if it meant diverting more waste from the landfills. As a result, residential fees will only increase by $1.91/month. CR&R has agreed to reduce rates for CMSD from $125/ton to $71.50/ton using public funds they received, including a $4.52 million grant from the California Energy Commission. According to Carroll, the diversion rate is expected to increase to 75 percent with the new collection service.Ĭhanges in rates for residents will be minimal, he adds. CMSD achieves a diversion rate of 57 percent, with most of the green waste used as alternative daily cover at landfills. In the current one cart system, residential waste and recyclables (including green waste) are separated at a transfer station. CMSD estimates approximately 250 tons of organics will be collected for digestion weekly. Hauling services for commingled trash/recyclables and organics will be provided by CR&R (using a separate truck for organics). “Plus the result is a marketable product.” “We want to be in the frontline before everyone else is scrambling to figure out what to do with their organics and composting companies are being maxed out,” says Scott Carroll, CMSD General Manager, of the CMSD Directors’ unanimous decision to begin source separated organics recycling. In a county where composting facilities are limited and landfill space is quickly disappearing, alternative means of managing waste are welcome. All food scraps, including meat, breads, produce and compostable bags, will be accepted. Residents will still have the luxury of commingling trash and recyclables, but organics - including food scraps and green waste - will be placed in a designated cart for processing at a new anaerobic digester to be owned and operated by CR&R in Perris, California. BioCycle May 2014 Costa Mesa, California: Curbside Organics To Digester Feedstockīeginning in January 2015, residents of Costa Mesa, parts of Newport Beach and unincorporated Orange County, serviced by the Costa Mesa Sanitary District (CMSD), will no longer dispose of their household waste in a single cart.
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