anaerobic digestion process Articles
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Software Download: Anaerobic Digestion Model No.1 (ADM1)
The IWA Task Group for Mathematical Modelling of Anaerobic Digestion Processes was created with the aim to produce a generic model and common platform for dynamic simulations of a variety of anaerobic processes. The purpose of this approach is to provide a unified basis for anaerobic digestion modelling. It is hoped this will promote increased application of modelling and simulation as a tool ...
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Computer simulation of control strategies for optimal anaerobic digestion
Three previously published control strategies for anaerobic digestion were implemented in Simulink/Matlab using Anaerobic Digestion Model No. 1 (ADM1) to model the biological process. The controllers’ performance were then simulated and evaluated based on their responses from five different types of process scenarios i.e. start-up and steady state performance as well as disturbances from ...
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Cleaning biogas with bacteria
Organic materials added to an anaerobic digester commonly contain sulphur components. During the anaerobic digestion process, the sulphur is converted into hydrogen sulphide (H2S), which is absorbed by the biogas. When the biogas produced in an AD plant goes on to be combusted in a gas engine or boiler, the H2S will give off sulphur dioxide (SO2) and sulphuric acid (H2SO4). It is for this reason ...
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Organic Rankine Cycle (ORC)
Biogas/Heat-to-Power Application using a Dreyer & Bosse CHP power unit Location: Trechwitz, Germany Site Gross Power Output Range 500Kwe + 30-35kWe from Electratherm ORC Thermal Heat Input Range: ?375-450kWt Hot Water Input Range:? 90-95°C (118-203°F) Hot Water Flow Range:? 39 m3/hour (172 GPM) Ambient Temperature: 0-15°C (32-59°F) ElectraTherm installed its first ...
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Anaerobic Digestion process monitoring and enhanced biogas production - Case Study
The SENTRY system was installed July 2017 at CNETE (Centre National en Electrochimie et en Technologies Environnementales) or National Center in Electrochemistry and Environmental Technologies testing facility in Quebec, Canada. A system was installed in two duplicate Anaerobic Digesters processing waste activated sludge. A pre-treatment step was added to one of the reactors, and the differences ...
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Modelling start-up performance of anaerobic digestion of saline-rich macro-algae
Some of the key factors affecting the adaptation of anaerobic digestion processes to increasing levels of salinity were determined in batch tests using brown seaweed as a feedstock. It was found that cultures seeded with non-saline anaerobic inoculum required an adaptation period of up to two months to reach the same level of methane production rate as in those cultures seeded with ...
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Using Anaerobic Biomass Digestion to Produce Hydrogen and Biofuel
For many years, hydrogen has been considered as an alternative to fossil fuels. Now, Scientists are aiming to develop an environmentally friendly method to produce hydrogen from biomass by optimizing anaerobic digestion systems.1 Climate change, dwindling fuel resources and energy prices have spearheaded intensive efforts to detect and optimize alternative fuel options. As a zero emission ...
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Using Anaerobic Biomass Digestion to Produce Hydrogen and Biofuel
For many years, hydrogen has been considered as an alternative to fossil fuels. Now, Scientists are aiming to develop an environmentally friendly method to produce hydrogen from biomass by optimizing anaerobic digestion systems.1 Climate change, dwindling fuel resources and energy prices have spearheaded intensive efforts to detect and optimize alternative fuel options. As a zero emission fuel, ...
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Increasing biogas yield through addition of food waste
1. Introduction The Moosburg wastewater treatment plant has one 634,008 gallons anaerobic digester, which was designed to process a maximum 23,775 gallons/day of activated sludge at 3.5% solids. The AD is currently processing 17,170 gallons/day of sludge and producing 39decatherms/day of energy from biogas. The operators would like to better utilize their anaerobic digester to achieve energy ...
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Novel anaerobic digestion process with sludge ozonation for economically feasible power production from biogas
A novel process scheme was developed to achieve economically feasible energy recovery from anaerobic digestion. The new process scheme employs a hybrid configuration of mesophilic and thermophilic anaerobic digestion with sludge ozonation: the ozonated sludge is first degraded in a thermophilic digester and then further degraded in a mesophilic digester. In small-scale pilot experiments of the ...
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Evaluation of anaerobic digestion processes for short sludge-age waste activated sludge combined with anammox treatment of digestate liquor
The need to reduce energy input and enhance energy recovery from wastewater is driving renewed interest in high-rate activated sludge treatment (i.e. short hydraulic and solids retention times (HRT and SRT, respectively)). This process generates short SRT activated sludge stream, which should be highly degradable. However, the evaluation of anaerobic digestion of short SRT sludge has been ...
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H2 Energy 7m3 DIY Biogas Storage
50 years after The Beatles barged their way into the public consciousness, fellow Merseysiders H2 Energy hope to herald a new wave of inspiration and confidence for the renewable energy sector by introducing their Bio Refining process. It would be quite wrong to describe H2 Energy as the new kids on the block however, as there is an enviable pedigree lurking behind the companies youthful good ...
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Bioenergy Innovation Center Sets the Record Straight on Clean Energy Production
SEAFORD, Del. – Bioenergy Devco, LLC, the company creating the new Bioenergy Innovation Center outside of Seaford, shared additional resources to provide accurate, detailed information about anaerobic digestion and the new facility in advance of a public hearing on the project. The Delaware Department of Natural Resources & Environmental Control is holding a virtual public hearing on ...
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UK’s First Military base to run almost completely on renewable energy - Case Study
Home to the frontline squadrons of the RAF’s elite Tornado Force and the F-35 Lightning, multi-role, stealth fighter, RAF Marham, is the UK’s first military base to run almost completely on green electricity. Power is generated from the anaerobic digestion (AD) of locally grown crops at Redstow Renewables, built and run by Future Biogas, one of the largest producers of biogas in the ...
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Peristaltic Pumps excel in Anaerobic Digestion & Biogas applications
Biogas is a natural gas also known as biofuel or biomass and is produced by breaking down organic material such as household waste, manure and crops grown specifically for biofuel with temperature-sensitive microbes and capturing the by-products. In practice, it is difficult to find a pumping system for this application. Why? The pumps needs to handle fluid media as well as gas parts The ...
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Siloxane Removal
SILOXANS IN BIOGAS. ORIGIN, EFFECTS AND TREATMENTS Biogas from landfills, digestion and wastewater treatment plants (wwtp) is a valuable material for the production of energy, biofuels and the production of chemical products such as hydrogen and methanol. As it is a source of renewable energy, it is inexhaustible, clean and can be used as planned. Their use generates less environmental ...
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SENTRY-AD: Real-time Monitoring of the Impact of Cleaning Agents on Performance of Anaerobic Digestion Systems Case Study
SENTRY-AD bio-electrode sensor that allows for the monitoring of microbial metabolic activity in the anaerobic digestion (AD) wastewater treatment process. The data generated by the bio-electrode sensor allows operators to monitor the impact of toxic chemicals on microbial health in the AD system. Cleaning agents, biocides, are used for equipment and container sterilization in the food and ...
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Q-Calc: A new App for managing food waste
Many wastewater treatment plants are intrigued with the idea of increasing biogas production by accepting food waste, but are concerned with process stability. As part of a Phase I SBIR from the USDA, Quantalux is developing a software decision tool called Q-Calc that provides operators with the ability to predict the digester’s health and stability when adding food waste to manure or ...
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High performance biogas plants for organics waste diversion
Wild fluctuations in prices for agricultural products and mushrooming prices for energy can greatly influence the economics of biogas plants. Long term reliable profitability calculations are becoming increasingly difficult. Generally speaking, however, rising energy prices have a positive effect on the economics of well designed biogas projects. By selecting low cost feedstock, the ...
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Biogas desulphurisation using the DMT multiple stage Sulfurex® process
Global rising energy costs are focusing efforts by many industrial and municipal entities to find new sources of energy. Generating electricity from Biogas is of course nothing new however the cost of cleaning up certain Biogas streams with excessive levels of Hydrogen Sulphide (H2S) has previously proven to be financially unsustainable. Rising energy costs combined with improvements and cost ...
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