digester system Articles
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GTI Has HP Hood’s Wastewater Treatment System Covered
The Customer: HP Hood LLC is one of the largest dairy operators in the United States with 13 plants across the country. It has been producing high quality, delicious dairy products for more than 160 years. The Customer’s Needs: HP Hood’s plant in Winchester, Virginia, USA, was undergoing a planned expansion to its wastewater treatment system to keep pace with consumer demand. The ...
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Modelling anaerobic digestion of concentrated black water and faecal matter in accumulation system
A dynamic mathematical model based on anaerobic digestion model no. 1 (ADM1) was developed for accumulation (AC) system treating concentrated black water and faecal matter at different temperatures. The AC system was investigated for the treatment of waste(water) produced from the following systems: vacuum toilet for black water (VBW), vacuum toilet for faeces with urine separation (VF), dry ...
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Grand Rapids Water Resource Recovery Facility, Michigan US - Case Study
The Grand Rapids Environmental Services Department operates the water resource recovery facility to keep all untreated sewage out of the Grand River in Michigan. The plant collects and treats an average of 40 million gallons of wastewater a day, using state-of-the-art technology in order to process the wastewater in the most sustainable way possible. As the plant is not a utility, it would not ...
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Dynamic modelling of nitrous oxide emissions from three Swedish sludge liquor treatment systems
The objective of this paper is to model the dynamics and validate the results of nitrous oxide (N2O) emissions from three Swedish nitrifying/denitrifying, nitritation and anammox systems treating real anaerobic digester sludge liquor. The Activated Sludge Model No. 1 is extended to describe N2O production by both heterotrophic and autotrophic denitrification. In addition, mass transfer ...
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Is Waste Going to be Our Apocalypse Without a Noah’s Ark to Save Us?
Human beings have been dumping waste in water, including the ocean, since before the Agricultural Age. The Industrial Age brought with it new materials to dump, chemical wastes and by-products. Some materials are dumped into rivers and find their way to the ocean by running downstream. Other materials are dumped directly into the ocean from boats. Plastic is a harmful pollutant that does not ...
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ISAM Sequencing batch reactor for 30,000 Gallons per day - Case study
The government of the Cayman Islands centralized their offices in one large building. The occupancy of this new building will be nearly 1000 employees. As the building was not located close to a sewer network, it required its own treatment plant. H2FLOW EQUIPMENT INC. supplied an ISAM SBR system designed to provide the performance required. The system features an integral sludge ...
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CH#970- Rotating Biological Contactors
Waste Type: Municipal Flow: 0.99 MGD Problem: Increases in BOD loadings had created a burden for this municipal plant and the operator in charge. Grease build-up had accumulated in the lift stations and a white filamentous film had developed on the RBC's. The plant settled poorly and there was a great deal of foaming on the aerobic digestors. A $110,000 project was planned to expand the ...
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Awareness of Fungi on Wood is Critical to Professionals
Untitled Document Those who deal with indoor fungal contamination could benefit by understanding more about the biology of common types of fungi on wood and wood products. It may assist in identifying potential problems and determining a course of action to be taken. Understanding the fungi you routinely see may allow you to assess the situation better. Walking through ...
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Turborator Improves ATAD Performance
Description The City of McMinnville, Oregon Water Reclamation Facility (WRF) is designed to treat wastewater with advanced processes to produce exceptional quality water to be discharged back into the local river system. As part of the process, the WRF produces Class A Biosolids using an Autothermal Thermophilic Aerobic Digestion (ATAD) process. The ATAD system was designed to require three ...
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The Benefits of Green Cleaning
Did you know that over 100 trillion bacterial cells consider your body their home? It’s true, and they outnumber your regular cells 10 to 1. These tiny guests live in your mouth, nose, and gut and they make up what is known as your microbiome – your highly personalized mini-ecosystem of both good and bad bacteria. The Antibacterial Craze We’ve become a nation obsessed with ...
By BetterAir
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Removal of fats, oils, & grease (F.O.G.) from grease traps and lift stations by means of advanced oxidation processing (A.O.P.) using the
Scenario: F.O.G. (Fats, Oils & Grease) deposits in both grease traps and lift stations accumulate within a short period of time. Their removal requires high-pressure Vac-Trucks and hazardous chemicals to break down and remove the unwanted build-up. Problem: Several problems occurring because of grease accumulation are: 1.) Clogged sewer lines 2.) Sanitary sewer overflows (SSO's) 3.) Raised ...
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Taming taste and odor (T & O) problems in a water treatment plant
Taming Taste & Odor (T&O) Problems Some taste and odors are caused by mineral constituents in the water, e.g. excess chlorine and hydrogen sulfide. However the majority of taste and odor are the result of biologic activity. Spring turnover of lakes and algal blooms are responsible for Blue-green algae (Cyanobacterium), Green algae and diatoms that introduce filter clogging organisms that ...
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Effect of microalgae inoculation on the start-up of microalgae–bacteria systems treating municipal, piggery and digestate wastewaters
The effect of the inoculation of a microalgae–bacteria system on the removal of nutrients and organic matter using municipal, piggery and digestate wastewaters was evaluated. Three conditions for each substrate were evaluated: (1) inoculation with activated sludge and illumination, (2) inoculation with activated sludge without illumination, and (3) inoculation with activated sludge plus a ...
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Atkinson, Nebraska; ISAM - Integrated Surge Anoxic Mix - Case Study
The City of Atkinson, Nebraska could not meet the Nebraska Department of Environmental Quality (NDEQ) effluent discharge requirements based on the new ammonia regulations. The existing plant also required extensive service and maintenance to keep the outdated equipment operational. Left with no choice, the plant needed to be upgraded. Client: Atkinson, Nebraska Solution: ISAM - Integrated Surge ...
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Cambi thermal hydrolysis combined with thermophilic/mesophilic digestion - from pilot to full scale application at Hamar Wwtp
ABSTRACTDuring 2001-2003 the city and county of San Francisco completed a two-year pilot study of pre-treatment processes to mesophilic anaerobic digestion for improved biosolids stabilization and production of biosolids suitable for unrestricted reuse (class A biosolids). The pre-treatment options investigated included: A thermophilic (55 °C; TP) process with 5 days hydraulic retention time ...
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Nisqually Tribal Casino grease trap and wastewater issues & DO2E Little John Digester Sytem - Case Study
As the facility manager at the Red Wind Casino in Olympia Washington, my duties included solving various wastewater problems, implementing standards and insuring compliance with wastewater issues. This work included installing several Little John Digesters, managing construction of a 10, 000 Sq. Ft. sewer collection system, and having to design build four additional, 30,000 Gallon grease traps ...
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Expanding the Digestible Fiber Pool
Reprinted from DairyHerd.com. Articled appeared on 11/24/2020 Probably the greatest advancement in dairy nutrition over the last 30 years has been our increased understanding of digestible fiber. NDF was considered monolithic and there were no differences when we plugged in the NDF of corn silage, alfalfa, warm and cool season grasses. Now with metrics such as NDFD30 and uNDF240 we know there ...
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Revealing biogenic sulfuric acid corrosion in sludge digesters: detection of sulfur-oxidizing bacteria within full-scale digesters
Biogenic sulfuric acid corrosion (BSA) is a costly problem affecting both sewerage infrastructure and sludge handling facilities such as digesters. The aim of this study was to verify BSA in full-scale digesters by identifying the microorganisms involved in the concrete corrosion process, that is, sulfate-reducing (SRB) and sulfur-oxidizing bacteria (SOB). To investigate the SRB and SOB ...
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Waste-to-Energy Solutions Improve Sustainability in the Dairy Industry
Converting dairy waste into biogas and other valuable resources trims disposal costs, and saves water and energy Dairy and livestock farmers have been reaping the benefits of converting animal waste into biogas through anaerobic digestion. Now dairy processors are following suit by recycling the organically rich waste that they generate. Instead of discharging waste byproducts into the ...
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EU Aims for Circular Economy by 2050
Decentralized water and wastewater solutions are well positioned to help make the move to a carbon-neutral and environmentally sustainable future The European Union’s Circular Economy Action Plan for a fully circular economy by 2050 ranks among the most ambitious environmental targets of any governmental body. In concordance with the 2050 climate neutrality goal of the European Green Deal, ...
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