anaerobic digester 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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Project Westry - Case Study
Location East Anglia Client Westry Project Type Digester Package Westry, a leading vegetable supplier based in East Anglia, recently made significant extensions to their Anaerobic Digestion plant as part of their upscaling works. Working closely with Anaerobic Digestion specialists Local Generation, Stortec delivered engineering and product installation of further Anaerobic ...
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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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Effect of solid-state NaOH pretreatment on methane production from thermophilic semi-dry anaerobic digestion of rose stalk
The effects of solid-state NaOH pretreatment on the efficiency of methane production from semi-dry anaerobic digestion of rose (Rosa rugosa) stalk were investigated at various NaOH loadings (0, 1, 2, and 4% (w/w)). Methane production, process stability and energy balance were analyzed. Results showed that solid-state NaOH pretreatment significantly improved biogas and methane yields of 30-day ...
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MICROBE-LIFT Technology Improves Efficiency of Anaerobic Digesters in Columbia - Preventing Costly Expansion - BIO-GAS
Location: Empresas Publicas, Columbia Background: Ecological Laboratories Inc. was contacted by Empresas Publicas to determine if bioaugmentation with MICROBE-LIFT® technology could assist in the operation of their anaerobic digesters. The facility consisted of two anaerobic digesters of 7,900 m3 each. The average flow rate was 1.8 m3 per second giving an average hydraulic retention time ...
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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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Effect of initial biomass on cellulose hydrolysis by leachate communities
Batch anaerobic digestions were performed in 160 ml serum vials, cellulose (1% wt) was the sole added carbon source. All reactors were inoculated with a 10% (v/v) leachate inoculum. The concentration of micro-organisms in the leachate inoculums was increased using centrifugation to investigate the effect of initial biomass on hydrolysis performance. The hydrolysis rate constant for digestions ...
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Environmental and energetic benefits derived from the anaerobic digestion of agroindustrial wastes
Agrifood industry plays a relevant role in the economic development of the autonomous community of Extremadura (Spain), and generates vast volumes of wastes featured by both high polluting potential and moisture content. The present work reports on a detailed analysis of biogas generation from the anaerobic digestion of industrial tomato residues and slaughterhouse wastes, in this way, yields ...
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Assessing the Market for Anaerobic Digestion
The anaerobic digestion (AD) industry is growing rapidly. In the UK there are over 215 anaerobic digesters in operation and more than 100 in planning. Understanding how a market will develop is crucial to any successful venture. A client came to us looking to improve their understanding of the current status and future potential of the AD market in the UK and Ireland. In order to progress ...
By NNFCC Ltd.
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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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Implementation of the anaerobic digestion model (ADM1) in the PHREEQC chemistry engine
Anaerobic digestion is state-of-the-art technology to treat sludge and effluents from various industries. Modelling and optimisation of digestion operations can be advantageously performed using the anaerobic digestion model (ADM1) from the International Water Association. The ADM1, however, lacks a proper physico-chemical framework, which makes it difficult to consider wastewater of complex ...
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Feasibility of high solid anaerobic digestion: option for treatment of distillers grains from cassava ethanol production
This research article mainly focused on the feasibility and management of distillers grains produced from ethanol industries using high solid anaerobic digestion systems. A significant barrier for distillers grains in the anaerobic process are its low pH (3.80–4.16) and high C/N ratio (37/1–42/1). According to distillers grains characteristics, the stillage investigated was in dry form (TS 23% to ...
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Multi-stage, in series, steam/water, natural gas Spirax Sarco, Italy 2012 - Case Study
Anaerobic digester genset in food industry. 1 stage of 198C/12 Bar steam generation, left hand side. 2 stages of water heating delivered by 2 standard modules, visible on right of unit. Pipes screwed in from underneath on standard modules; modules can be removed individually. Hinged access doors for easy cleaning, sealing nuts will be replaced by latches on future ...
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Why is a University in the Bioenergy Business?
Why is a University in the Bioenergy Business? This article provides an interesting read from the perspective of the University of Wisconsin Oshkosh exploring the diverse range of benefits from their fleet of three anaerobic digesters. From campus sustianability, to unique learning opportunities, all the way to expanding digester opportunities to thesmall family dairies, and more. The original ...
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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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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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Load factor for Anaerobic Digestion Plants
Digester concept of BWE biogas plants which allows to reach 95% of load factor. ...
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Modified ADM1 for high-rate anaerobic co-digestion of thermally pre-treated brewery surplus yeast wastewater
Co-digestion of surplus yeast with brewery wastewater is a potentially economical method for recovering energy, in the form of biogas, from this difficult to dispose of by-product. In this work a modified version of the ADM1 (Anaerobic Digestion Model No. 1) was calibrated for an anaerobic digester fed with thermally pre-treated brewery yeast surplus wastewater. The model could predict ...
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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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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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