Biogas Production from Algal Biomass from Municipal Wastewater Treatment

2016 ◽  
Vol 7 (4) ◽  
pp. 747-752 ◽  
Author(s):  
Petr Hlavínek ◽  
Luboš Stříteský ◽  
Radka Pešoutová ◽  
Lucie Houdková
Keyword(s):  
Wastewater Treatment ◽  
Algal Biomass ◽  
Municipal Wastewater ◽  
Biogas Production ◽  
Municipal Wastewater Treatment

Carbon footprints of Scandinavian wastewater treatment plants

2013 ◽  
Vol 68 (4) ◽  
pp. 887-893 ◽  
Author(s):  
D. J. I. Gustavsson ◽  
S. Tumlin
Keyword(s):  
Wastewater Treatment ◽  
Carbon Footprint ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Biogas Production ◽  
Heat Pumps ◽  
Coefficient Of Performance ◽  
Municipal Wastewater Treatment ◽  
Carbon Footprints ◽  
Fossil Carbon

This study estimates the carbon footprints of 16 municipal wastewater treatment plants (WWTPs), all situated in Scandinavian countries, by using a simple model. The carbon footprint calculations were based on operational data, literature emission factors (efs) and measurements of greenhouse gas emissions at some of the studied WWTPs. No carbon neutral WWTPs were found. The carbon footprints ranged between 7 and 108 kg CO2e P.E.−1 year−1. Generally, the major positive contributors to the carbon footprint were direct emissions of nitrous oxide from wastewater treatment. Whether heat pumps for effluents have high coefficient of performance or not is extremely important for the carbon footprint. The choice of efs largely influenced the carbon footprint. Increased biogas production, efficient biogas usage, and decreased addition of external fossil carbon source for denitrification are important activities to decrease the carbon footprint of a WWTP.

scholarly journals Advanced Wastewater Treatment to Eliminate Organic Micropollutants in Wastewater Treatment Plants in Combination with Energy-Efficient Electrolysis at WWTP Mainz

Energies ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3599 ◽  
Author(s):  
Oliver Gretzschel ◽  
Michael Schäfer ◽  
Heidrun Steinmetz ◽  
Erich Pick ◽  
Kim Kanitz ◽  
...  
Keyword(s):  
Water Management ◽  
Wastewater Treatment ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Biogas Production ◽  
Automatic Frequency ◽  
Municipal Wastewater Treatment ◽  
Organic Micropollutants ◽  
Micropollutant Removal

To achieve the Paris climate protection goals there is an urgent need for action in the energy sector. Innovative concepts in the fields of short-term flexibility, long-term energy storage and energy conversion are required to defossilize all sectors by 2040. Water management is already involved in this field with biogas production and power generation and partly with using flexibility options. However, further steps are possible. Additionally, from a water management perspective, the elimination of organic micropollutants (OMP) is increasingly important. In this feasibility study a concept is presented, reacting to energy surplus and deficits from the energy grid and thus providing the needed long-term storage in combination with the elimination of OMP in municipal wastewater treatment plants (WWTPs). The concept is based on the operation of an electrolyzer, driven by local power production on the plant (photovoltaic (PV), combined heat and power plant (CHP)-units) as well as renewable energy from the grid (to offer system service: automatic frequency restoration reserve (aFRR)), to produce hydrogen and oxygen. Hydrogen is fed into the local gas grid and oxygen used for micropollutant removal via upgrading it to ozone. The feasibility of such a concept was examined for the WWTP in Mainz (Germany). It has been shown that despite partially unfavorable boundary conditions concerning renewable surplus energy in the grid, implementing electrolysis operated with regenerative energy in combination with micropollutant removal using ozonation and activated carbon filter is a reasonable and sustainable option for both, the climate and water protection.

Impacts of blackwater co-digestion on biogas production in the municipal wastewater treatment sector using pilot-scale UASB and CSTR reactors

2017 ◽  
Vol 91 ◽  
pp. 121-128 ◽  
Author(s):  
Stephan Wasielewski ◽  
Carlo Gottardo Morandi ◽  
Karen Mouarkech ◽  
Ralf Minke ◽  
Heidrun Steinmetz
Keyword(s):  
Wastewater Treatment ◽  
Municipal Wastewater ◽  
Biogas Production ◽  
Pilot Scale ◽  
Municipal Wastewater Treatment

scholarly journals Application of ultrasonic disintegration to waste activated sludge for increasing of biogas production by anaerobic digestion

2020 ◽  
Vol 2 (2) ◽  
pp. 17-21
Author(s):  
Ion Viorel Patroescu ◽  
Razvan Laurentiu Dinu ◽  
Mihai Stefanescu ◽  
Valeriu Robert Badescu ◽  
Nicolae Ionut Cristea ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Municipal Wastewater ◽  
Biogas Production ◽  
Treatment Plant ◽  
Experimental Tests ◽  
Organic Load ◽  
Municipal Wastewater Treatment ◽  
Biological Sludge ◽  
Sludge Stabilization

The municipal wastewater treatment is the source of significant amounts of primary and secondary sludge which is under the present legislation referring to quality and management aspects. It is estimated that a half of wastewater treatment plant costs are due to the sludge management. Anaerobically sludge stabilization, capitalization as energy source, in order to diminish the costs and sludge volume decreasing, are the aims of the main operational steps of sludge treatment, as a part of wastewater treatment plant. The improvement of sludge anaerobically stabilization process must be possible by acting in the rate limiting step - hydrolysis in order to rise the organic carbon solubilization. The increase of soluble carbon can be possible by adding a pretreatment step of waste biological sludge, ultrasonic disintegration being one option. This paper emphasized the experimental results regarding anaerobically stabilization of the thickened waste biological sludge by ultrasonication taking into account the results of blank test, without ultrasonication. Experimental tests show that ultrasonic disintegration of the sludge having initial dried substances content (d.w) 2.72% and soluble organic load COD of 598 mg O2/L led to soluble COD concentration of 4950-6710 mg O2/L after sonication with specific energy in the range of 3.06 - 14.24 kWh/kg d.w. Anaerobically stabilization during 25 test days at 36 0C of the mixture 40% disintegrated biological sludge and 60% digested sludge (inoculum) mixture led to 30-38.6% increase of biogas production comparing with parallel test with non-sonicated sludge.

scholarly journals Anaerobic Codigestion of Municipal Wastewater Treatment Plant Sludge with Food Waste: A Case Study

2016 ◽  
Vol 2016 ◽  
pp. 1-13 ◽  
Author(s):  
Zubayeda Zahan ◽  
Maazuza Z. Othman ◽  
William Rajendram
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Municipal Wastewater ◽  
Biogas Production ◽  
Treatment Plant ◽  
Surface Model ◽  
Municipal Wastewater Treatment ◽  
Biogas Yield ◽  
Municipal Wastewater Treatment Plant ◽  
Anaerobic Reactors

The aim of this study was to assess the effects of the codigestion of food manufacturing and processing wastes (FW) with sewage sludge (SS), that is, municipal wastewater treatment plant primary sludge and waste activated sludge. Bench scale mesophilic anaerobic reactors were fed intermittently with varying ratio of SS and FW and operated at a hydraulic retention time of 20 days and organic loading of 2.0 kg TS/m3·d. The specific biogas production (SBP) increased by 25% to 50% with the addition of 1%–5% FW to SS which is significantly higher than the SBP from SS of 284±9.7 mLN/g VS added. Although the TS, VS, and tCOD removal slightly increased, the biogas yield and methane content improved significantly and no inhibitory effects were observed as indicated by the stable pH throughout the experiment. Metal screening of the digestate suggested the biosolids meet the guidelines for use as a soil conditioner. Batch biochemical methane potential tests at different ratios of SS : FW were used to determine the optimum ratio using surface model analysis. The results showed that up to 47-48% FW can be codigested with SS. Overall these results confirm that codigestion has great potential in improving the methane yield of SS.

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