Addressing the synergy determination in anaerobic co-digestion and the inoculum activity impact on BMP test

2019 ◽  
Vol 80 (2) ◽  
pp. 387-396 ◽  
Author(s):  
Andres Donoso-Bravo ◽  
Valentina Ortega ◽  
Yves Lesty ◽  
Hugues Vanden Bossche ◽  
Diego Olivares
Keyword(s):  
Wastewater Treatment ◽  
Anaerobic Digestion ◽  
Data Processing ◽  
Organic Waste ◽  
Wastewater Treatment Plants ◽  
Test Results ◽  
Degradation Kinetic ◽  
Gompertz Equation ◽  
Bmp Test ◽  
Potential Test

Abstract Anaerobic mono-digestion and co-digestion are nowadays widely used in wastewater treatment plants (WWTP). However, the data processing of the conventional biochemical potential test (BMP) carried out to assess potential substrates should be enhanced to reduce the uncertainty of the results. In this study, two methodologies aiming to improve the data processing in anaerobic digestion studies were proposed. The methodologies aimed at the estimation of synergy in anaerobic co-digestion of organic waste and the standardization of the BMP test results by considering the activity of the inoculums under mono-digestion conditions. Both methodologies comprise the application of the Gompertz equation. For the first methodology, four cosubstrates and two types of substrates were used. Regarding synergy estimation, the cosubstrates dairy whey and grease sludge had an impact on the degradation kinetic. In regard to the second methodology, the results indicate that the activity of the inoculums exerts an influence on the BMP analysis, and it should be considered. This can be meaningful when comparing results among studies when different inoculums are used or even for studies where the same inoculum is used but it is taken at different reactor operational moments.

Sludge minimization by disintegration at different wastewater treatment plants

2008 ◽  
Vol 3 (1) ◽  
Author(s):  
Luchien Luning ◽  
Paul Roeleveld ◽  
Victor W.M. Claessen
Keyword(s):  
Organic Matter ◽  
Wastewater Treatment ◽  
Anaerobic Digestion ◽  
Sewage Sludge ◽  
New Technologies ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Biological Degradation ◽  
Ongoing Research ◽  
Sludge Minimization

In recent years new technologies have been developed to improve the biological degradation of sewage sludge by anaerobic digestion. The paper describes the results of a demonstration of ultrasonic disintegration on the Dutch Wastewater Treatment Plant (WWTP) Land van Cuijk. The effect on the degradation of organic matter is presented, together with the effect on the dewatering characteristics. Recommendations are presented for establishing research conditions in which the effect of sludge disintegration can be determined in a more direct way that is less sensitive to changing conditions in the operation of the WWTP. These recommendations have been implemented in the ongoing research in the Netherlands supported by the National Institute for wastewater research (STOWA).

Perspective Biomass Carrier for Anaerobic Processing Systems of Organic Waste AIC

2020 ◽  
Vol 67 (1) ◽  
pp. 148-155
Author(s):  
Anatoliy V. Fedotov ◽  
Viktor S. Grigoriev ◽  
Dmitriy A. Kovalev ◽  
Andrey A. Kovalev
Keyword(s):  
Wastewater Treatment ◽  
Anaerobic Digestion ◽  
Specific Surface ◽  
Organic Waste ◽  
Porous Ceramic ◽  
Experimental Studies ◽  
Ceramic Materials ◽  
Porous Ceramics ◽  
Developed Surface ◽  
Highly Porous

To speed up the wastewater treatment under aerobic conditions and to optimize the processes of anaerobic wastewater treatment in digesters, immobilization technologies of microorganisms and enzymes on solid carriers are used. Ceramic carriers based on aluminosilicates and alumina are one of the promising inorganic biomass carriers. (Research purpose) To study the structure of porous ceramic biomass carriers for anaerobic processing of organic waste and evaluate the prospects for their use. (Materials and methods) The substrate for anaerobic digestion was a mixture of sediments of the primary and secondary sewage sumps of the Lyubertsy treatment facilities. K-65 cattle feed was used to ensure the constancy of the composition of organic substances in substrates as a cosubstrate. The authors used the method of low-temperature nitrogen adsorption of Bruner-Emmett-Teller to study the pore structure and specific surface of solid carriers on a specific surface analyzer Quntachrome Autosorb-1. (Results and discussion) The main characteristics (specific surface, volume of micro- and mesopores, predominant pore radius, water absorption and others) of chamotte foam lightweight and highly porous corundum ceramics were determined. It was revealed that ceramic materials with a developed surface and electrically conductive material provided an increase in biogas yield by 3.8-3.9 percent with an increase in methane content by an average of 5 percent. (Conclusions) The results of anaerobic digestion showed a positive effect of both a conductive carrier and highly porous ceramic materials on the process of anaerobic bioconversion of organic waste into biogas. It is advisable to expand experimental studies on the use of a conductive carrier with a developed surface based on highly porous ceramics.

scholarly journals Sugarcane Bagasse as a Co-Substrate with Oil-Refinery Biological Sludge for Biogas Production Using Batch Mesophilic Anaerobic Co-Digestion Technology: Effect of Carbon/Nitrogen Ratio

Water ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 590
Author(s):  
Aiban Abdulhakim Saeed Ghaleb ◽  
Shamsul Rahman Mohamed Kutty ◽  
Gasim Hayder Ahmed Salih ◽  
Ahmad Hussaini Jagaba ◽  
Azmatullah Noor ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Sugarcane Bagasse ◽  
Organic Waste ◽  
Wastewater Treatment Plants ◽  
Biogas Production ◽  
Raw Materials ◽  
Oil Refinery ◽  
Methane Yield ◽  
Oil Refineries ◽  
Biological Sludge

Man-made organic waste leads to the rapid proliferation of pollution around the globe. Effective bio-waste management can help to reduce the adverse effects of organic waste while contributing to the circular economy at the same time. The toxic oily-biological sludge generated from oil refineries’ wastewater treatment plants is a potential source for biogas energy recovery via anaerobic digestion. However, the oily-biological sludge’s carbon/nitrogen (C/N) ratio is lower than the ideal 20–30 ratio required by anaerobic digestion technology for biogas production. Sugarcane bagasse can be digested as a high C/N co-substrate while the oily-biological sludge acts as a substrate and inoculum to improve biogas production. In this study, the best C/N with co-substrate volatile solids (VS)/inoculum VS ratios for the co-digestion process of mixtures were determined empirically through batch experiments at temperatures of 35–37 °C, pH (6–8) and 60 rpm mixing. The raw materials were pre-treated mechanically and thermo-chemically to further enhance the digestibility. The best condition for the sugarcane bagasse delignification process was 1% (w/v) sodium hydroxide, 1:10 solid-liquid ratio, at 100 °C, and 150 rpm for 1 h. The results from a 33-day batch anaerobic digestion experiment indicate that the production of biogas and methane yield were concurrent with the increasing C/N and co-substrate VS/inoculum VS ratios. The total biogas yields from C/N 20.0 with co-substrate VS/inoculum VS 0.06 and C/N 30.0 with co-substrate VS/inoculum VS 0.18 ratios were 2777.0 and 9268.0 mL, respectively, including a methane yield of 980.0 and 3009.3 mL, respectively. The biogas and methane yield from C/N 30.0 were higher than the biogas and methane yields from C/N 20.0 by 70.04 and 67.44%, respectively. The highest biogas and methane yields corresponded with the highest C/N with co-substrate VS/inoculum VS ratios (30.0 and 0.18), being 200.6 mL/g VSremoved and 65.1 mL CH4/g VSremoved, respectively.

Experiences with the Norwegian Approval System for Small Wastewater Treatment Plants

1993 ◽  
Vol 28 (10) ◽  
pp. 25-32 ◽  
Author(s):  
B. Paulsrud ◽  
S. Haraldsen
Keyword(s):  
Wastewater Treatment ◽  
Pollution Control ◽  
Wastewater Treatment Plants ◽  
Real Life ◽  
Test Results ◽  
Life Testing ◽  
Minimum Period ◽  
Service Contract ◽  
Control Authority ◽  
Mandatory Service

The Norwegian State Pollution Control Authority introduced in 1986 a system for approval of wastewater treatment plants serving less than 35 persons. This system is based upon three approval classes and includes “real life” testing of the plants for a minimum period of six months. During the test period several factors (hydraulic capacity, sludge production, effluents concentrations etc.) are examined. The six types of plant that have been approved so far are described and the test results are presented and discussed. General experiences with the approval system are summarized, including effects of the mandatory service contract between manufacturer/supplier and the houseowner.

Minimisation of excess sludge production in a WWTP by coupling thermal hydrolysis and rapid anaerobic digestion

2005 ◽  
Vol 52 (10-11) ◽  
pp. 255-263 ◽  
Author(s):  
J. Chauzy ◽  
S. Graja ◽  
F. Gerardin ◽  
D. Crétenot ◽  
L. Patria ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Anaerobic Digestion ◽  
Pilot Plant ◽  
Hydraulic Retention Time ◽  
Wastewater Treatment Plants ◽  
Control Line ◽  
Thermal Hydrolysis ◽  
Excess Sludge ◽  
Anaerobic Digesters ◽  
Sludge Production

In many cases, reducing sludge production could be the solution for wastewater treatment plants (WWTP) that here difficulty evacuating the residuals of wastewater treatment. The aim of this study was to test the possibility of minimising the excess sludge production by coupling a thermal hydrolysis stage and an anaerobic digestion with a very short HRT. The tests were carried out on a 2,500 p.e. pilot plant installed on a recycling loop between the clarifier and the actived sludge basin. The line equipped with the full scale pilot plant produced 38% TSS less than the control line during a 10 week period. Moreover, the rapid anaerobic digestion removed, on average, more than 50% of the total COD load with a hydraulic retention time (HRT) of 3 days. Lastly, the dryness of the remaining excess sludge, sanitised by the thermal hydrolysis, was more than 35% with an industrial centrifuge. This combination of thermal hydrolysis and rapid anaerobic digestion equally permits a significant gain of compactness compared to traditional anaerobic digesters.

The possibility of using encapsulated nitrifiers for treatment of reject water coming from anaerobic digestion

2012 ◽  
Vol 65 (8) ◽  
pp. 1428-1434 ◽  
Author(s):  
L. Vacková ◽  
R. Stloukal ◽  
J. Wanner
Keyword(s):  
Wastewater Treatment ◽  
Anaerobic Digestion ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Ammonia Nitrogen ◽  
Synthetic Wastewater ◽  
Reject Water ◽  
Batch Tests ◽  
Plant Optimization ◽  
Nitrogen Concentrations

Large wastewater treatment plants have to deal not only with the influent wastewater, but also with the highly concentrated reject water coming from anaerobic digestion. The aim of this work was to verify the suitability of using encapsulated nitrifiers in polyvinyl alcohol carrier (so called Lentikats Biocatalyst) at temperatures between 5 and 30 °C. For laboratory nitrification batch tests synthetic wastewater with ammonia nitrogen (Namon) concentration 10–800 mg L−1 was used. The system has been proved to operate at the temperature of 10 °C, but not at 5 °C. It was found that the highest specific nitrification rates were observed at 30 °C and with ammonia nitrogen concentrations above 250 mg L−1, which means that separate treatment of reject water by using encapsulated biomass seems to be an effective tool for wastewater treatment plant optimization.

Energy Saving Technologies for Wastewaters Treatment with Application of Utilization Gas-Turbine Units

2017 ◽  
Vol 6 (1) ◽  
pp. 58-65
Author(s):  
Тумашев ◽  
R. Tumashev ◽  
Щеголев ◽  
N. Schegolev ◽  
Назаревич ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Anaerobic Digestion ◽  
Gas Turbine ◽  
Wastewater Treatment Plants ◽  
Operating Cost ◽  
Treatment Plant ◽  
Electrical Energy ◽  
Ecological Condition ◽  
Raw Material ◽  
Wastewaters Treatment

Improving the ecological condition of water basins is closely connected with reconstruction of systems for water disposal and wastewaters treatment. Modernization of old-fashioned wastewater treatment plants, and operating cost saving is possible by means of transition to effective technological solutions, including the process of substrate anaerobic digestion with production of biogas and raw material for high-quality fertilizers. Biogas can be used in power stations for production of thermal and electrical energy required for wastewater treatment plant needs. This energy also reduces the plant’s operating cost. A scheme of a module for anaerobic digestion has been proposed, and application of utilization cogeneration gas-turbine units with an external supply of warmth to cyclic air has been justified. Optimum parameters of utilization gas-turbine units have been determined. At air temperature in front of the turbine 1190 K the compression ratio in a cycle is equal to 4,2, electric efficiency — 0,313, the general one taking into account the developed warmth — 0,872. In some cases the gas-turbine unit can be manufactured without booster fuel compressor.

Analysis of biogas produced by the anaerobic digestion of sludge generated at wastewater treatment plants in the South of Minas Gerais, Brazil as a potential energy source

2018 ◽  
Vol 41 ◽  
pp. 139-153 ◽  
Author(s):  
Aline Tathyana Alves Felca ◽  
Regina Mambeli Barros ◽  
Geraldo Lúcio Tiago Filho ◽  
Ivan Felipe Silva dos Santos ◽  
Eruin Martuscelli Ribeiro
Keyword(s):  
Energy Source ◽  
Wastewater Treatment ◽  
Anaerobic Digestion ◽  
Potential Energy ◽  
Wastewater Treatment Plants ◽  
Minas Gerais ◽  
The South

Struvite control through process and facility design as well as operation strategy

2004 ◽  
Vol 49 (2) ◽  
pp. 191-199 ◽  
Author(s):  
J.B. Neethling ◽  
M. Benisch
Keyword(s):  
Wastewater Treatment ◽  
Anaerobic Digestion ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Secondary Treatment ◽  
Operation Strategy ◽  
Municipal Wastewater Treatment ◽  
Facility Design ◽  
Municipal Wastewater Treatment Plants

Struvite deposition is a common problem in municipal wastewater treatment plants and can be signi?cant if not anticipated, but struvite deposits are completely manageable if properly addressed. This paper summarises experiences from a number of facilities that have dealt successfully with struvite problems, elaborates on the interrelations between secondary treatment and anaerobic digestion, and outlines an approach to control struvite and available alternatives.

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