scholarly journals Efficiency of sweet whey fermentation with psychrophilic methanogens

2021 ◽  
Author(s):  
Marcin Dębowski ◽  
Ewa Korzeniewska ◽  
Joanna Kazimierowicz ◽  
Marcin Zieliński
Keyword(s):  
Removal Efficiency ◽  
Natural Environment ◽  
Waste Product ◽  
Dairy Industry ◽  
Psychrophilic Bacteria ◽  
Methane Fermentation ◽  
Anaerobic Bioreactors ◽  
Type Flow ◽  
Sweet Whey ◽  
Flow Through

AbstractSweet whey is a waste product from the dairy industry that is difficult to manage. High hopes are fostered regarding its neutralization in the methane fermentation. An economically viable alternative to a typical mesophilic fermentation seems to be the process involving psychrophilic bacteria isolated from the natural environment. This study aimed to determine the feasibility of exploiting psychrophilic microorganisms in methane fermentation of sweet whey. The experiments were carried out under dynamic conditions using Bio Flo 310 type flow-through anaerobic bioreactors. The temperature inside the reactors was 10 ± 1 °C. The HRT was 20 days and the OLR was 0.2 g COD/dm3/day. The study yielded 132.7 ± 13.8 mL biogas/gCODremoved. The CH4 concentration in the biogas was 32.7 ± 1.6%, that of H2 was 8.7 ± 4.7%, whereas that of CO2 reached 58.42 ± 2.47%. Other gases were also determined, though in lower concentrations. The COD and BOD5 removal efficiency reached 21.4 ± 0.6% and 17.6 ± 1.0%, respectively.

The monitoring of methane fermentation in sequencing batch bioreactor with flow-through array of miniaturized solid state electrodes

Talanta ◽  
2010 ◽  
Vol 81 (4-5) ◽  
pp. 1387-1392 ◽  
Author(s):  
Agnieszka Buczkowska ◽  
Emilia Witkowska ◽  
Łukasz Górski ◽  
Anna Zamojska ◽  
Krzysztof W. Szewczyk ◽  
...  
Keyword(s):  
Solid State ◽  
Methane Fermentation ◽  
Batch Bioreactor ◽  
Flow Through

scholarly journals Treatment of dairy wastewater in UASB-UF system

2018 ◽  
Vol 44 ◽  
pp. 00087 ◽  
Author(s):  
Anna Kwarciak-Kozłowska ◽  
January Bień
Keyword(s):  
Organic Pollutants ◽  
Fermentation Process ◽  
Dairy Industry ◽  
Dairy Wastewater ◽  
Uasb Reactor ◽  
Treatment Efficiency ◽  
Methane Fermentation ◽  
Ultrafiltration Process ◽  
Raw Wastewater

The examinations concerned determination of the treatment efficiency of wastewater form dairy industry using the system which combines methane fermentation with ultrafiltration process. The study attempted to determine the effect of HRT and OLR on the degree of biodegradation of contaminants contained in the sludge examined and on the quality and amount of biogas. The anaerobic process obtained a considerable degree of the removal of organic pollutants from raw wastewater designated as COD (73.8%), BOD (81.2%) and TOC (76%). The concentrations of COD and BOD were 1053 mg/dm3 and 329 mg/dm3, respectively. The value of TOC reached a level of 288 mg/dm3. Generated biogas in the methane fermentation process of wastewater from dairy wastewater was characterized by high methane content (82 % vol.). In the final part of the experiment, the UF process was used in order to posttreating effluent from UASB reactor. During the UF process, COD, BOD and TOC parameters were removed at 72%, 63% and 67%, respectively.

Miniaturized flow-through sensor array for methane fermentation monitoring

2009 ◽  
Author(s):  
Patrycja Ciosek ◽  
Agnieszka Buczkowska ◽  
Emilia Witkowska ◽  
Wojciech Wroblewski ◽  
Anna Zamojska ◽  
...  
Keyword(s):  
Sensor Array ◽  
Methane Fermentation ◽  
Fermentation Monitoring ◽  
Flow Through

COUETTE-TYPE FLOW THROUGH A POROUS-WALLED ANN ANNULUS

AIAA Journal ◽  
1963 ◽  
Vol 1 (1) ◽  
pp. 217-219
Author(s):  
K. N. Mehta
Keyword(s):  
Type Flow ◽  
Flow Through

scholarly journals Modelling formation and removal of biofilms in secondary dairy raw materials

2020 ◽  
pp. 59-68
Author(s):  
Svetlana Ryabtseva ◽  
Yulia Tabakova ◽  
Andrey Khramtsov ◽  
Georgy Anisimov ◽  
Vitalii Kravtsov
Keyword(s):  
Glass Surface ◽  
Raw Materials ◽  
Dairy Industry ◽  
Skim Milk ◽  
Whey Permeate ◽  
Biofilm Growth ◽  
Sweet Whey ◽  
Acid Whey ◽  
Skimmed Milk ◽  
Milk Permeate

Introduction. Microorganisms of dairy raw materials tend to adhere to the surfaces of processing equipment and form sustainable biofilms, which is a serious issue in the dairy industry. The goal of the present work was to investigate formation of biofilms on a glass surface in static model conditions, and removal of such biofilms by cleaning. Study objects and methods. The study objects were the permeates of skim milk, sweet whey and acid whey, as well as the biofilms formed and washings from glass slides. Biofilms were removed from the glass with detergents used in the dairy industry. Standard methods of determining microbiological and physicochemical properties were used to characterize the permeates. The biofilm structure and morphology of microorganisms participating in biofilm formation were investigated with a light spectroscopy. The efficiency of biofilm removal in a cleaning process was quantified with optical density of washings. Results and discussion. Biofilms in whey permeates formed slower compared to those in skimmed milk permeate during the first 24 h. Yeasts contributed significantly to the biofilm microflora in acid whey permeate throughout 5 days of biofilm growth. Well adhered biofilm layers were the most stable in skimmed milk permeate. The highest growth of both well and poorly adhered biofilm layers was observed in sweet whey permeate after 3–5 days. It was established that the primary attachment of microorganisms to a glass surface occurred within 8 h, mature multicultural biofilms formed within 48 h, and their partial destruction occurred within 72 h. Conclusion. The research results can be used to improve the cleaning equipment procedures in processing secondary dairy raw materials.

IV Landscape: Time and Motion

2009 ◽  
Vol 39 ◽  
pp. 47-61
Author(s):  
Diana Spencer
Keyword(s):  
Natural Environment ◽  
Golden Age ◽  
Cultural Assumptions ◽  
Life And Death ◽  
Agricultural Communities ◽  
Time And Motion ◽  
Flow Through ◽  
Definition Of ◽  
Over Time ◽  
Scientific Advances

We have already thought about how Golden Age imagery influences understanding of what landscape should be about, and we will return later to issues of chronology and temporality. Here, we start with some strategies for reading landscape as a sequence of places that can be combined to tell a story. One definition of space makes it what we experience by moving through a series of places, which we connect up into patterns by picking particular routes to follow. Using this model, landscape stories invite us to move into and around them, offering different ‘ways of going out and coming back in’, depending on how we map our route. Following the narrative flow through a landscape takes time. Time, however, is relative – and culturally constructed; depending on context and terminology, time can move at different speeds and follow different logics. Bakhtin's chronotope is helpful here. Using the natural environment to create a structure for understanding how time passes gives meaning and order to the passage of the year. For agricultural communities, it was a matter of life and death: studding the calendar with legends and myths closely linked to places, seasons, and appropriate activities was one way to ensure that good and bad ways of doing things were remembered over time. Calendars therefore engage in a complex dialogue with religious and cultural assumptions, and they also respond to scientific advances in measuring the passage of time.

scholarly journals Effect of Inorganic Coagulants on the Characteristics in Anaerobic Digested Distillery Stillage Valorization

Proceedings ◽  
2018 ◽  
Vol 2 (20) ◽  
pp. 1271
Author(s):  
Magda Dudek ◽  
Paulina Rusanowska ◽  
Marcin Zieliński ◽  
Marcin Dębowski
Keyword(s):  
Liquid Phase ◽  
Organic Compounds ◽  
Suspended Solids ◽  
Liquid Fraction ◽  
Waste Product ◽  
Inorganic Salts ◽  
Bioethanol Production ◽  
Methane Fermentation ◽  
Arable Fields

The aim of the study was to determine the possibility of using coagulation for treatment of anaerobically digested distillery stillage. Post-fermentation sludge from waste product of bioethanol production is usually drained. Then, condensed sediments are directed as a fertilizer for arable fields. The remaining liquid phase due to the high content of organic compounds cannot be discharged to environment. The study used inorganic salts of iron and aluminum as coagulants to treatment liquid fraction obtained after methane fermentation of distillery stillage. In valorization process, the reduction of organic compounds and suspended solids was not sufficient. The highest doses of coagulants reduced COD concentration of about 80% and lower the pH of the solution. However, the dose 10 mL/L is not economically profitable and due to concentration of aluminum or iron it is too harmful for environment.

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