anaerobic digester optimization Articles
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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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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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Optimal anaerobic digestion of high BOD waste with an acclimatised and fresh seed culture combination
With rising energy costs and increasing environmental pollution, this paper looks at how treatment of biological waste is emerging as a cost-effective solution towards both these problems.Keywords: anaerobic digestion, biological waste, environmental pollution, autohydrolysate, biogas, biochemical oxygen demand, BOD, chemical oxygen demand, COD, digestion, effluent, fatty acids, gas collector, ...
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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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Thermal hydrolysis pre-treatment for high solids anaerobic digestion
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 results of this effort will help in the design of the new Solids Handling Facility (SHF) at the 11 m3/s Southeast Water Pollution Control Plant ...
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Roles of Microorganisms in Anaerobic Digestion and Biogas Production
Anaerobic digestion is a biological process in which microorganisms break down organic matter without oxygen and transform them into end-products, including biogas, an energy-rich gas comprised of methane (CH4), carbon dioxide (CO2), and other trace amounts of gases. Anaerobic digestion can be summarized as a four-stage process (1) hydrolysis, (2) acidogenesis, (3) acetogenesis, and (4) ...
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Biogas recovery from a temperate climate covered anaerobic pond
New Zealand has over 1000 anaerobic waste stabilisation ponds treating wastewater from farms and industry. Traditional anaerobic ponds were not designed to optimise anaerobic digestion to produce biogas and are therefore uncovered, releasing biogas to the atmosphere, which can cause odour problems and contributes to GHG emissions. The biogas production and treatment performance of an anaerobic ...
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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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