anaerobic digester production Articles
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A fuzzy rule–based approach for modelling effects of bench–scale microwave pre–treatment on solubilisation and anaerobic digestion of secondary sludge
Fuzzy rule–based models were proposed in order to predict the effect of microwave pretreatment on the waste activated sludge (WAS) solubility and anaerobic digestibility or biogas production. The developed models were trained and validated using the experimental data from two separate multilevel factorial designs, containing 24 solubilisation and 54 biogas production runs from batch mesophilic ...
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Microalgae growth for nutrient recovery from sludge liquor and production of renewable bioenergy
Proof-of-concept has been demonstrated for a process that will utilize nutrients from sludge liquor, natural light, and CO2 from biogas to grow microalgae at wastewater treatment plants. This process will reduce the impact of returning side-streams to the head of the plant. The produced algae will be fed to anaerobic digesters for increased biogas production. Dewatering of anaerobically digested ...
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Waste-to-Energy Upgrade for Chicken Processing WWTP - Case Study
When one of Italy’s top chicken producers needed to increase production while lowering costs, it turned to Fluence for a waste-to-energy upgrade to its existing WWTP. When one of Italy’s top agro-food processors wanted to expand its operations, it faced some difficult challenges, including reducing operational costs and producing an effluent that would meet strict European Union ...
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Sludge electrooxidation as pre-treatment for anaerobic digestion
Anaerobic digestion of wastewater sludge is the preferred method for sludge treatment as it produces energy in the form of biogas as well as a stabilised product that may be land applied. Different pre-treatments have been proposed to solubilise organic matter and increase biogas production. Sludge electrooxidation with boron-doped diamond electrodes was used as pre-treatment for waste ...
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How Much Energy Can Anaerobic Digestion Produce?
The total energy produced can vary widely depending on factors including what is being treated Anaerobic digestion is a waste treatment process that breaks down organic matter with bacteria that thrive in the absence of oxygen. Feedstocks can include manure, sewage biosolids, and food wastes. Among anaerobic digestion’s advantages is its ability to treat high-load streams while producing ...
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Thermal Activation of Digested Sewage Sludges for Carbon Dioxide Removal from Biogas
Sewage sludges from a wastewater treatment plant (WWT) were anaerobically digested for the biogas production and energy use. The refuses of such process were used as starting material for the char production for the gas cleaning process. These char samples were experimentally tested as adsorbents for the removal of CO2 and trace contaminants from the biogas mixture produced from the WWT plant. A ...
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Inter-stage thermophilic aerobic digestion may increase organic matter removal from wastewater sludge without decreasing biogas production
Combining aerobic and anaerobic digestion in a two-stage system can improve the degradation of wastewater sludge over the use of either technology alone. But use of aerobic digestion as a pre-treatment before anaerobic digestion generally reduces methane production due to loss of substrate through oxidation. An inter-stage configuration may avoid this reduction in methane production. Here, we ...
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Technical and economic analysis of real anaerobic digester centrate by means of partial nitrification and sustainable heterotrophic denitrification
The reliability of partial nitrification coupled with heterotrophic denitrification for the treatment of real anaerobic digester centrate produced in a wastewater treatment plant was technically and economically assessed in two sequencing batch reactors. Removal efficiencies above 90% were consistently achieved at N-ammonium loads above 1.2 g N L−1 d−1. Ethanol, affluent ...
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Adding Value With Anaerobic Digestion
Adding waste-to-energy technology to wastewater treatment produces energy that can be used to power operations Anaerobic digestion (AD) is a biological process that uses microbes to biodegrade organic matter (feedstock) in the absence of oxygen. It provides a host of benefits in the treatment of challenging wastewater streams while offering the opportunity to produce value in the process. ...
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Turkish biogas monitored with AEMS
Application Anaerobic digestion – waste water Equipment AEMS Location Antalya, Turkey Customer Kuzu Group and General Directorate of Antalya Water and Wastewater Administration Requirement The customer was looking for: A low maintenance gas monitoring system Local sales support and service through Geotech’s distributor in Turkey, Ram Completely automatic operation Remote ...
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FOG Waste receiving and processing facility design considerations
Fats, Oils, and Grease (FOG) wastes and high-strength wastes (HSW) are frequently received at municipal water resource recovery facilities (WRRFs) as trucked-in wastes. These wastes offer significant benefits in terms of revenue from tipping fees and feedstock for co-digestion in anaerobic digesters that produce biogas, which can be beneficially used as fuel. The number of treatment plants ...
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What Is Dissolved Air Flotation?
In dissolved air flotation (DAF), fine bubbles attach themselves to suspended matter in a liquid, floating them to the surface for removal Dissolved air flotation (DAF) is a water treatment technology often used for the pretreatment of source water, but what exactly does it entail and how does it fit in with other technologies? DAF is a type of coagulation-flocculation technology typically ...
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`Megadrought` Stalls Agriculture in Western US
Extended dry conditions call for creative use of alternative water sources, including water reuse and desalination This year, “megadrought” has thrown large swaths of the Southwestern United States into “exceptional drought” conditions, the most severe category on the U.S. Drought Monitor scale. By mid-May, 84% of the West was in drought, 47% considered severe or ...
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The EFC Advantage in Confectionary Wastewater Treatment
Fluence’s EFC reactor boosts anaerobic digestion to efficiently deal with high flows and high organic load. Industrial operations are often charged high rates for municipal infrastructure to treat their high-strength wastewater. Pretreating effluent in-house with anaerobic digestion systems can reduce surcharges and provide an excellent ROI. For example, the confectionary industry produces ...
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Dairy feeds Biogas plant with whey - Case study
Fluence added anaerobic digestion to the existing WWTP at an Italian dairy farm – without halting production. Our highly innovative and technologically advanced waste-to-energy solutions provide great opportunities for dairy farms to maintain sustainable businesses. Because biogas plants use biodegradable wastes as feedstock for anaerobic digestion, companies can save money while meeting ...
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Influence of chemically enhanced primary treatment on anaerobic digestion and dewaterability of waste sludge
To lower energy consumption at a sewage treatment plant (STP), primary settling could be enhanced to direct more chemical oxygen demand (COD) to anaerobic digestion (AD) for increased biogas production and decreased aeration. Primary settling can be chemically enhanced by applying flocculation aids (FAs). FAs are refractory compounds that may affect all sludge treatment facilities. In this ...
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Beating treatment to enhance digestibility of fresh grass
Anaerobic digestion (AD) is one of the most popular biomass conversion technologies. AD can be further divided into four stages: pre–treatment, digestion, gas upgrading and digestate. The main goal of pre–treatment is to improve degradability of the material in order to enhance gas production and anaerobic digester performance. Beating treatment as a new mechanical treatment technique has been ...
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Life Cycle Assessment of an intensive sewage treatment plant in Barcelona (Spain) with focus on energy aspects
Life Cycle Assessment was used to evaluate environmental impacts associated to a full-scale wastewater treatment plant (WWTP) in Barcelona Metropolitan Area, with a treatment capacity of 2 million population equivalent, focussing on energy aspects and resources consumption. The wastewater line includes conventional pre-treatment, primary settler, activated sludge with nitrogen removal, and ...
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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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Growth of microalgal biomass on supernatant from biosolid dewatering
The paper reports the results of an experiment to assess the feasibility of including a photobioreactor within the design of a wastewater treatment plant, growing microalgae on the centrate from anaerobic sludge dewatering. The growth of algal biomass would take advantage of the available nitrogen and provide a substrate for biogas production by anaerobic digestion. Tests were carried out by ...
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