scholarly journals Optimization of the process of anaerobic-aerobic purification of waste waters of food production using the spatial separation of stages

2018 ◽  
Vol 245 ◽  
pp. 18003 ◽  
Author(s):  
Rustem Khabibullin ◽  
Olga Ivanchenko ◽  
Andrey Petrov ◽  
Rahat Bhat
Keyword(s):  
Microbial Community ◽  
Organic Compound ◽  
Food Production ◽  
Alternative Energy ◽  
Spatial Separation ◽  
Process Efficiency ◽  
Organic Load ◽  
Waste Waters ◽  
Biological Purification ◽  
Milk Treatment

The advanced energyand resource saving technologies for purification of industrial waste waters from the food production include both anaerobic biotechnologies, and the combined ones, which include anaerobic and aerobic purification steps. They possess such advantages as economic efficiency, high purification efficiency, minimal formation of excess sludge and ability to obtain alternative energy carrier - biogas. The aim of this investigation was to perform optimization of the process of anaerobic-aerobic biological purification of wastewaters from the milk treatment enterprise. During our investigation we have studied relations between the efficiency of the process of anaerobic-aerobic biological purification of wastewaters of the milk treatment enterprise and specific organic load. We investigated influence of the spatial separation of the anaerobic step of purification with directed succession of the microbial community, which performs the sequence of destruction of the organic compound on the process efficiency. It was shown, that the preliminary anaerobic purification of wastewaters from the milk treatment enterprise allows one to significantly reduce organic load at the aerobic stage of the purification facilities and remove up to 85% of the organic compound. With increase of the specific organic load from 1.4 up to 2.8 kg COD·m -3·days-1 we see a drastic improvement of the efficiency characteristics both for anaerobic and aerobic stages. The redox-potential of the fermentation medium depends on the metabolitic activity of the microbial community and might be used as an efficiency characteristics for destruction of the organic compound at the anaerobic stage, and as an indicator for the oxygen saturation of the medium at the aerobic stage of purification.

START-UP STRATEGY FOR SBR TREATMENT OF COMPLEX INDUSTRIAL WASTEWATER

1994 ◽  
Vol 30 (3) ◽  
pp. 149-155
Author(s):  
M. Muñiz ◽  
A. G. Lavin ◽  
M. Díaz
Keyword(s):  
Industrial Wastewater ◽  
Low Cost ◽  
Process Efficiency ◽  
Normal Operation ◽  
Organic Load ◽  
Feeding Time ◽  
Good Test ◽  
High Salinity Water ◽  
Start Up ◽  
Complex Organic

In SBR processes, the start-up operation is of considerable interest, not only because of the effect of the efficiency on normal operation, but also because of the cost of the transport of sludge seed and the related feeding time with artificial substrate. The selection of the strategy bas not been studied previously as far as we know, although it is a problem of considerable economic importance. This is not only a problem of the relation between seed magnitude and the start-up timing, but also the effect on the process efficiency. The start-up in SBRs is more frequent than in conventional activated sludge when considering SBRs are mainly used for industrial wastewater treatment, where there are more stops and changes of organic load. A start-up strategy for SBR biological treatment of industrial wastewater with several complex organic components, based on two steps (Filling and Conditioning Periods), bas been proposed and put into operation in a pilot plant column. The strategy looks for minimum time to achieve high steady state efficiency, and low cost of implementation, and sludge seeding. It makes a provision for feed on the basis of inhibition potential and organic needs, and introduces instructions during the operation, depending on the results being obtained. The results of this strategy using a complex organic high salinity water are presented. The presence in this case of two types of solvents and very high salts concentration has been a good test problem for the proposed strategy because of the necessity of multiple adaptation of sludge and the considerably difficult problem to be solved.

scholarly journals The Application of Response Surface Methodology in the Study of Photodegraded Industrial Dairy Effluents by the Photo-Fenton Process: Optimization and Economic Viability

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Carla Cristina Almeida Loures ◽  
Hélcio José Izário Filho ◽  
Ivy dos Santos Oliveira ◽  
Gisella Rossana Lamas Samanamud ◽  
André Luiz de Souza ◽  
...  
Keyword(s):  
Oxygen Demand ◽  
Statistical Design ◽  
Cost Benefit ◽  
Process Efficiency ◽  
Organic Load ◽  
Maximum Efficiency ◽  
Fenton Process ◽  
Fenton Reagent ◽  
Benefit Evaluation ◽  
Dairy Effluents

This study presents results from an application of Photo-Fenton process for organic-load reduction in dairy effluents. Process efficiency was evaluated in terms of percentage dissolved organic carbon, chemical oxygen demand, and biochemical oxygen demand (DOC, COD, and BOD, resp.), whose initial values were 1658±145 mg O2 L−1, 9500±500 mg O2 L−1, and 2400 ± 100 mg O2 L−1, respectively. We applied a statistical design represented by Box-Behnken factorial design inclusive of Fenton's reagent, the power of applied radiation (W), and pH factors. The set temperature value was 30°C with a reaction time of 60 min. The maximum efficiency obtained was at pH=3.5, Fenton reagent in the proportion of 35 g H2O2 + 3.6 g Fe2+, and ultraviolet radiation potency of 28 W. The results obtained for DOC, COD, and BOD were 81%, 90.7%, and 78.8%, respectively. Regarding the cost/benefit evaluation, the variables and their levels should be the following: pH 3.5, 35.0 g H2O2/Fe2+ 3.6 g, and 28 W UV, obtaining a reduction in concentration of 79.5% DOC.

Microbial community related to volatile organic compound (VOC) emission in household biowaste

2006 ◽  
Vol 8 (11) ◽  
pp. 1960-1974 ◽  
Author(s):  
Sabine Mayrhofer ◽  
Tomas Mikoviny ◽  
Sebastian Waldhuber ◽  
Andreas O. Wagner ◽  
Gerd Innerebner ◽  
...  
Keyword(s):  
Microbial Community ◽  
Organic Compound ◽  
Volatile Organic Compound ◽  
Voc Emission ◽  
Volatile Organic

scholarly journals Energy efficiency of food production wastewater anaerobic-aerobic treatment

2019 ◽  
Vol 140 ◽  
pp. 01001 ◽  
Author(s):  
Rustem Khabibullin ◽  
Thao Le Huong ◽  
Olga Ivanchenko ◽  
Andrey Petrov
Keyword(s):  
Energy Efficiency ◽  
Wastewater Treatment ◽  
Food Production ◽  
Functional Dependence ◽  
Organic Load ◽  
Specific Yield ◽  
Process Conditions ◽  
Resource Saving ◽  
Specific Flow ◽  
Load Rate

The advanced energyand resource saving technologies of food production wastewater treatment include anaerobic and aerobic steps. At present, various methods of intensification and optimization are used to increase the efficiency of anaerobic processes of wastewater treatment, including selection of active microbial communities, providing the optimum temperature regime, immobilizing biomass by granulation or biofilm formation, reducing various inhibitory effects, phase separation or pre-acidification, chemical or biological pretreatment of wastewater. The aim of this investigation was researching the effect of hydraulic and organic load rates on the energy efficiency of the wastewater treatment process and evaluating the energy efficiency depending on process conditions. Experimental laboratory installation included subsequently connected bioreactors, one from which acted as first stage and other bioreactors as the second stages of anaerobic process. It was shown that the biogas formation at the first and second stages differs significantly. A small volume of released biogas on the first stage allows us to ignore it, but characteristics of biogas formation at the second stage bioreactors are close and are described by general functional dependence. The specific yield of biogas from the organic matter consumed Ybg is independent of the specific organic load rate L, but is dependent on the specific flow rate of the treated water D.

scholarly journals Influence of hydraulic and organic load on the anaerobic-aerobic dairy wastewater treatment characteristics

2021 ◽  
Vol 247 ◽  
pp. 01002
Author(s):  
Rustem Khabibullin ◽  
Thao Le Huong ◽  
Andrey Petrov
Keyword(s):  
Dilution Rate ◽  
Loading Rate ◽  
Organic Matter Content ◽  
Spatial Separation ◽  
Matter Content ◽  
Dairy Wastewater ◽  
Organic Load ◽  
Organic Loading Rate ◽  
Organic Loading ◽  
Treatment Efficiency

The performance of the anaerobic-aerobic sequencing labscale reactors for the treatment of a milk processing wastewater was studied. The wastewater flow rate was varied from 78.0 to 149.0 ml•h-1 and organic matter content from 3.8 to 6.8 g COD∙dm-3. This corresponded to the change of dilution rate from 0.4 to 0.8 day-1 and organic loading rate from 1.4 to 2.8 g COD•dm-3•day-1. An increase of hydraulic load reduced the treatment efficiency at the first anaerobic stage from 44.4 to 29.7%, but it was compensated at the aerobic treatment stage. Increasing the organic loading rate improved the treatment efficiency at the anaerobic stage from 44.4 to 54.2%. It was shown that spatial separation of anaerobic stage onto two phases increases the treatment efficiency in anaerobic stage and in whole (85.8 and 98.7%) in comparison to non-separation mode (45.5 and 73.9%, respectively). The correlation analysis of the organic loading rate L, organic consumption rate P and dilution rate D on the treatment efficiency E allowed to obtain the equations can be used for mathematical optimization of the process.

scholarly journals Correlating Microbial Community Characteristics with Environmental Factors along a Two-Stage Biological Aerated Filter

Water ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 3317
Author(s):  
Yuchen An ◽  
Songmin Li ◽  
Xiaoling Wang ◽  
Yuyang Liu ◽  
Ruonan Wang
Keyword(s):  
Microbial Community ◽  
Environmental Factors ◽  
High Throughput Sequencing ◽  
Pollutant Removal ◽  
Organic Load ◽  
Biological Aerated Filter ◽  
Community Characteristics ◽  
Two Stage ◽  
Degrading Bacteria ◽  
Aerated Filter

The purification effect of a biological aerated filter (BAF) mainly comes from the microorganisms in the reactor. Understanding the correlation between microbial community characteristics and environmental factors along the filter has great significance for maintaining good operation and improving the removal efficiency of the filter. A two-stage BAF was employed to treat domestic sewage under organic loads of 1.02 and 1.55 kg/m3·d for 15 days each. 16S rDNA high-throughput sequencing technology and redundancy analysis were applied to explore the correlation between microbial community characteristics and environmental variables. The results showed that: (1) the crucial organic-degrading bacteria in the A-stage filter were of the genus Novosphingobium, which had a significant increase in terms of relative abundance at sampling outlet A3 (135 cm of the filling height) after the increase of organic load; (2) the microbial communities at different positions in the B-stage filter were similarly affected by environmental factors, and the main bacteria associated with nitrogen removal in the B-stage filter were Zoogloea and Rhodocyclus; and (3) to improve the pollutant removal performance of this two-stage biological aerated filter, a strategy of adding an internal circulation in the B-stage filter can be adopted.

scholarly journals Biological degradation of potato pulp waste and microbial community structure in microbial fuel cells

RSC Advances ◽  
2017 ◽  
Vol 7 (14) ◽  
pp. 8376-8380 ◽  
Author(s):  
Yushi Tian ◽  
Xiaoxue Mei ◽  
Qing Liang ◽  
Di Wu ◽  
Nanqi Ren ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Community Structure ◽  
Microbial Community ◽  
Microbial Community Structure ◽  
Microbial Fuel Cells ◽  
Energy Production ◽  
Alternative Energy ◽  
Biological Degradation ◽  
Potato Pulp ◽  
Degrading Bacteria

The syntrophic interactions between polysaccharide-degrading bacteria and exoelectrogens drove simultaneous alternative energy production and degradation of potato pulp waste in microbial fuel cells.

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