scholarly journals Treatment of Cheese Whey Wastewater Using an Expanded Granular Sludge Bed (EGSB) Bioreactor with Biomethane Production

Processes ◽  
2020 ◽  
Vol 8 (8) ◽  
pp. 931
Author(s):  
Abumalé Cruz-Salomón ◽  
Edna Ríos-Valdovinos ◽  
Francisco Pola-Albores ◽  
Selene Lagunas-Rivera ◽  
Rosa Isela Cruz-Rodríguez ◽  
...  
Keyword(s):  
Cheese Whey ◽  
Negative Impact ◽  
Removal Rate ◽  
Granular Sludge ◽  
Organic Load ◽  
Biochemical Methane Potential ◽  
Stable Conditions ◽  
Methane Potential ◽  
Biomethane Production ◽  
Cod Removal Rate

Cheese whey wastewater (CWW) is the major by-product of the dairy industry. CWW is produced in large quantities, has varied characteristics and is usually disposed of. The disposal of CWW causes a negative impact on the environment of different agroindustrial areas due to the physic-chemical composition that significantly increases its high organic load and nutrients. For this reason, the aim of this work was to carry out an evaluation of the anaerobic treatability of an Expanded Granular Sludge Bed (EGSB) bioreactor as a new sustainable alternative for treatment of these effluents with bioenergy production. In this study, the bioreactor was operated under stable conditions (i.e., buffer index of 0.23 ± 0.1, pH 7.22 ± 0.4 and temperature 26.6 ± 1.4 °C) for 201 days. During evaluation the hydraulic retention time (HRT) was 6 and 8 days, and it was buffered with NaHCO3. At these conditions, the COD removal rate and biochemical methane potential (BMP) were 90, 92%; and 334, 328 mLCH4/gCOD, respectively. The evidence found in this study highlighted that the CWW is a viable substrate to be treated in the EGSB bioreactor as long as it keeps buffered. Furthermore, the process to treat the CWW in an EGSB bioreactor can be a sustainable alternative to simultaneously solve the environmental pollution that this agro-industry confronts and produce renewable and environmentally-friendly bioenergy.

Effect of influent pH on hydrolytic acidification performance and bacterial community structure in EGSB for pretreating crotonaldehyde manufacture wastewater after ozonation

2019 ◽  
Vol 79 (6) ◽  
pp. 1174-1183
Author(s):  
Tao Liu ◽  
Zhiqiang Shen ◽  
Chunyu Zhang ◽  
Yudong Song ◽  
Jie Li ◽  
...  
Keyword(s):  
Community Structure ◽  
Volatile Fatty Acids ◽  
Removal Rate ◽  
Oxygen Demand ◽  
Granular Sludge ◽  
Biodegradation Rate ◽  
Biochemical Methane Potential ◽  
Methane Potential ◽  
Cod Removal Rate ◽  
Hydrolytic Acidification

Abstract The objective of this work was to evaluate the effect of influent pH on the hydrolytic acidification (HA) performance and microbial community structure in an expanded granular sludge bed (EGSB) pretreating crotonaldehyde manufacture wastewater (CMW) after ozonation. The results showed that higher chemical oxygen demand (COD) removal rate (40.1%) and acidification degree (27.6%) were obtained at pH 8.0 than those at pH 6.0 and pH 4.0. The concentration of extractable extracellular polymeric substance (EPS) in the sludge gradually decreased with the pH decreasing from 8.0 to 4.0. A similar change was also observed for the concentration of total volatile fatty acids (TVFA) in the effluent. The optimal detoxification efficiency by the HA process was obtained at pH 8.0, with higher removal efficiency (all higher than 90%) of the main toxic pollutants (crotonaldehyde, 5-formyl-6-methyl-4,5-dihydropyran, etc.) and higher anaerobic biodegradation rate (44.5%) in biochemical methane potential (BMP) assay. Among the predominant genera, the Acinetobacter and Pseudomonas were possibly related to biodegradation of pollutants, since their higher relative abundance also coincided with the better performance of the HA process at pH 8.0.

scholarly journals Anaerobic Co-Digestion of Cheese Whey and Industrial Hemp Residues Opens New Perspectives for the Valorization of Agri-Food Waste

Energies ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2820 ◽  
Author(s):  
Stefano Papirio ◽  
Silvio Matassa ◽  
Francesco Pirozzi ◽  
Giovanni Esposito
Keyword(s):  
Agricultural Production ◽  
Cheese Whey ◽  
National Context ◽  
Economic Aspects ◽  
Biochemical Methane Potential ◽  
Dual Purpose ◽  
Key Sectors ◽  
Methane Potential ◽  
Biomethane Production ◽  
Industrial Hemp

Cheese whey (CW) and hemp hurds (HH) represent typically overabundant biowastes of food and agricultural production, and their circular management is crucial to improve both sustainability and profitability of the agri-food chain. By combining experimental biochemical methane potential (BMP) tests and literature data, the techno-economic aspects of a possible future bioenergy valorization of CW and HH through anaerobic digestion (AD) and co- digestion (coAD) were analyzed. Along the 42-days, BMP assays, CW, and HH alone rendered BMP values of 446 ± 66 and 242 ± 13 mL CH4·g VS−1, respectively. The application of coAD with CW and HH at a 70:30 ratio allowed to enhance the biomethane production by 10.7%, as compared to the corresponding calculated value. In terms of economic profitability, the valorization of HH as biomethane in a dual-purpose hemp cultivation could potentially enable net profits of up to 3929 €·ha−1, which could rise to 6124 €·ha−1 in case of coAD with CW. Finally, by projecting the biomethane potential from current and future available CW and HH residues in the national context of Italy, a total biomethane yield of up to 296 MNm3·y−1 could be attained, offering interesting perspectives for the sustainability of key sectors such as transportation.

Study on IC Reactor Treating Straw-Washing Wastewater and Changes of Sludge Bed

2012 ◽  
Vol 518-523 ◽  
pp. 2834-2843
Author(s):  
Ke Zeng ◽  
Shi Hao Liu ◽  
Yu Jie Hou ◽  
Ming Lei Zhang
Keyword(s):  
Removal Rate ◽  
Control Level ◽  
Granular Sludge ◽  
Anaerobic Treatment ◽  
Gas Production ◽  
Normal Operation ◽  
Cod Removal Rate ◽  
Washing Wastewater ◽  
Operation Phase ◽  
Washing Water

In this paper, we utilized IC reactor to treat straw-washing wastewater of straw pulping and papermaking. The removal rate of COD in normal operation is 28.14%, which is much lower than the value of wake-up stage and acclimation stage; gas production rate in the whole normal operation phase kept a lower level, and the average is 12.36L/h; so straw-washing water is not suitable for advanced anaerobic treatment. While COD removal rate is 28.14%, SCOD removal rate is only 6.96%; added the effluent VFA concentration which is 692~1211mg/L is greatly exceed normal control level, we can know that when treating straw-washing water the biological system was under acidification phase of the anaerobic process. Thus the straw-washing water is suitable for hydrolysis-acidification Process. Granular size of seed sludge was 3~5mm, 100 days later it became 1.5~3mm, and 120 days later it was 1~2.5mm mainly, With the acidification occurring, the mass proportion of the granular sludge to total sludge was reduced, the proportions of 2# and 3# sampling ports are decreasing from 70~85% to 30~50%. Because of lack of adequate nutrition and appropriate loading conditions, straw-washing water can’t support the cultivation and maintenance of granular sludge.

Granular sludge is a preferable inoculum for the biochemical methane potential assay for two complex substrates

2020 ◽  
Vol 309 ◽  
pp. 123359 ◽  
Author(s):  
Roy Posmanik ◽  
Andrew H. Kim ◽  
Rodrigo A. Labatut ◽  
Joseph G. Usack ◽  
Largus T. Angenent
Keyword(s):  
Granular Sludge ◽  
Biochemical Methane Potential ◽  
Methane Potential

Anaerobic Treatment of Cheese Dairy Wastewater Using the SNC Bioreactor

1993 ◽  
Vol 28 (3) ◽  
pp. 597-620 ◽  
Author(s):  
Catherine N. Mulligan ◽  
Bechara F. Safi ◽  
Jacques Meunier ◽  
Jean Chebib
Keyword(s):  
Retention Time ◽  
Removal Rate ◽  
Oxygen Demand ◽  
Anaerobic Treatment ◽  
Gas Production ◽  
Cod Removal ◽  
Dairy Wastewater ◽  
Organic Load ◽  
Whey Permeate ◽  
Cod Removal Rate

Abstract The SNC multiplate reactor (1,200 L) has been developed and tested to determine chemical oxygen demand (COD) removal, nutrient requirement, and gas production from the anaerobic treatment of effluents generated at the Agropur (Notre Dame-du-Bon-Conseil, Quebec) and Nutrinor cheese dairies (Chambord, Quebec). At the Agropur plant, wastewater (3,000 mg/L COD) was treated the best at a retention time of 12 h. Using this retention time, effluents containing whey with organic loads of 10.2 to 41.6 kg COD/m3/day could be treated at a 84% COD removal rate. When the reactor was subjected to shock by increasing the organic load suddenly from 8.9 to 31 kg COD/m3/day, the total COD removal decreased to 72% and then returned to 86% after 7 days. Hydrology tests indicated that the reactor functions as a series of completely mixed stirred tanks. At Nutrinor, using a 12-h retention time and diluted whey permeate (20,000 mg/L COD), total COD removal was 86% and gas production was 12.0 m3/m3/day for a loading of 36.5 kg COD/m3/day. Nutrient supplementation was not required. For experiments performed with different proportions of wastewater (2,000 mg/L COD) to whey permeate (70,000 mg/L COD) results of 89% total and 93% soluble COD removal with a gas production of 11 m3/m3/day for a loading of 25 kg COD/m3/day were obtained. Retention times were varied from 18 to 60 h to correspond to initial CODs of 20,000 to 70,000 mg/L. In conclusion, this reactor functions in a superior manner to other published anaerobic treatment systems.

scholarly journals Optimisation of C:N Ratio for Co-Digested Processed Industrial Food Waste and Sewage Sludge Using the BMP Test

2011 ◽  
Vol 9 (1) ◽  
Author(s):  
Zuhaib Siddiqui ◽  
N.J. Horan ◽  
Kofi Anaman
Keyword(s):  
Sewage Sludge ◽  
Food Waste ◽  
Biogas Production ◽  
C:N Ratio ◽  
Methane Yield ◽  
Biochemical Methane Potential ◽  
Volatile Solids ◽  
Methane Potential ◽  
Biomethane Production ◽  
Bmp Test

Biomethane production from processed industrial food waste (IFW) in admixture with sewage sludge (primary and waste activated sludge: PS and WAS) was evaluated at a range of C:N ratios using a standard biochemical methane potential (BMP) test. IFW alone had a C:N of 30 whereas for WAS it was 5.4 and thus the C:N ratio of the blends fell in that range. Increasing the IFW content in mix improves the methane potential by increasing both the cumulative biogas production and the rate of methane production. Optimum methane yield 239 mL/g VSremoved occurred at a C:N ratio of 15 which was achieved with a blend containing 11 percent (w/w) IFW. As the fraction of IFW in the blend increased, volatile solids (VS) destruction was increased and this led to a reduction in methane yield and amount of production. The highest destruction of volatile solids of 93 percent was achieved at C:N of 20 followed by C:N 30 and 15. A shortened BMP test is adequate for evaluating optimum admixtures.

scholarly journals Effect of Paper vs. Bioplastic Bags on Food Waste Collection and Processing

2021 ◽  
Author(s):  
Giovanni Dolci ◽  
Arianna Catenacci ◽  
Francesca Malpei ◽  
Mario Grosso
Keyword(s):  
Waste Management ◽  
Food Waste ◽  
Waste Collection ◽  
Biochemical Methane Potential ◽  
Recycled Paper ◽  
Weight Losses ◽  
Breathable Fabric ◽  
Methane Potential ◽  
New Type ◽  
Biomethane Production

Abstract Purpose The most abundant among the separately collected waste materials in Italy is food waste. This research aims to evaluate the influence of the type of collection bag on the food waste management chain. In Italy, the food waste collection is mainly based on bioplastic bags. As an alternative, a new type of recycled paper bag shows potential advantages. Methods The two types of collection bag were compared evaluating the weight loss of food waste during the household storage, by means of an experimental assessment simulating the domestic dynamic bag filling. Moreover, the biomethane production of bags under anaerobic conditions was measured at the lab-scale level with Biochemical Methane Potential (BMP) tests. Results During the household storage, the breathable fabric of the paper allows for higher weight losses, ranging on average between + 29 and + 44% compared to bioplastic. BMP tests, carried out under different conditions (temperature, inoculum), showed a 2–14 times higher generation of methane by paper bags compared to bioplastic bags, when referred to 1 kg of inserted food waste. Conclusions Collecting the food waste inside paper bags shows advantages compared to the use of bioplastic bags. First, the waste collection is benefitted thanks to the lower weight of material to be transported to treatment plants, leading also to the possibility of decreasing the collection frequency. Moreover, paper resulted more compatible than bioplastic with the anaerobic digestion treatment, which is currently rapidly increasing as a food waste management option. Graphic Abstract

scholarly journals Potencial bioquímico de metano de águas residuárias da ultrafiltração no processamento da acerola (Malpighia emarginata) verde

2020 ◽  
Vol 41 (2) ◽  
pp. 135
Author(s):  
Andreza Carla Lopes Andre ◽  
Miriam Cleide Cavalcante de Amorim ◽  
Kessia Caroline Dantas da Silva ◽  
Paula Tereza Souza e Silva
Keyword(s):  
Methane Production ◽  
Food Industry ◽  
Pilot Scale ◽  
Organic Load ◽  
Anaerobic Sludge ◽  
Biochemical Methane Potential ◽  
Decay Rate Constant ◽  
Malpighia Emarginata ◽  
Load Removal ◽  
Methane Potential

Ultrafiltration clarifies fruit juices, in the food industry, but generates retentive, recalcitrant wastewater, which, by its organic nature, may present a potential for biodegradation and methane production. This study aimed to evaluate the biochemical methane potential (BMP) in wastewater from the processing of unripe green acerola, obtaining the mass balance and the speed of organic load removal in COD terms. The BMP assays followed the German Guidelines VDI 4630, by applying three COD loads per liter of reactor vial (0,86 g CDOAplied L-1R, 1,5 g CDOAplied L-1R e 2,0 g CDOAplied L-1R), , in batches, inoculated with the anaerobic sludge from reactors treating domestic sewage, at 30 0C. The pH, COD, and methane production were evaluated every 48 hours. The biodegradability and the decay rate constant of the COD (Kd) were determined, thus obtaining the methanized COD, the COD for the formation of new cells, and the COD present in the wastewater, in the form of volatile acids. The best BMP was 0.100 L CH4 g -1 CDORemoved, the percentages of methanization were above 62 %, and the highest Kd occurred for the lowest load applied. The anaerobic digestion of the wastewater proved viable for in full-scale, with its application being suggested at a pilot scale.  

Investigation of kinetics of anaerobic digestion of Canary grass

2012 ◽  
Vol 66 (6) ◽  
Author(s):  
Anna Kacprzak ◽  
Liliana Krzystek ◽  
Katarzyna Paździor ◽  
Stanisław Ledakowicz
Keyword(s):  
Experimental Data ◽  
Organic Waste ◽  
Cheese Whey ◽  
Animal Manure ◽  
Biochemical Methane Potential ◽  
Digestion Process ◽  
Methane Potential ◽  
Canary Grass ◽  
Kinetics Of ◽  
Phalaris Canariensis

AbstractThe most promising technology to generate energy is the production of biogas from agricultural feedstock. This technology allows obtaining high biogas yields per hectare. Biogas of high methane content can be produced from various kinds of energy crops, animal manure, and other organic waste. This paper presents results of both biochemical methane potential (BMP) assay of Canary grass (Phalaris canariensis) and its anaerobic co-digestion with cheese whey and glycerin fraction in a large laboratory scale as well as the kinetics of both co-digestion and digestion of Canary grass alone. The suggested mathematical description of the anaerobic co-digestion process gave satisfying conformity with the experimental data.

Build and Apply of Granular Sludge Enriched by Phosphorus Accumulating Organisms

2012 ◽  
Vol 535-537 ◽  
pp. 2394-2399
Author(s):  
Dong Chen Na
Keyword(s):  
Phosphorus Removal ◽  
Removal Rate ◽  
Granular Sludge ◽  
Cod Removal ◽  
Experimental Results ◽  
Biological Phosphorus Removal ◽  
Removal Process ◽  
Cod Removal Rate ◽  
The Stability ◽  
Biological Phosphorus

Based on the previous studies ,A/O technics culture granular sludge both with rich PAOs in the traditional SBR reactor. The experimental results show that: In the stability run-time of granules sludge system NH+4-N 、PO4-P and COD removal rate could reach 95% ,82%and 93%. This paper further discusses the characteristics of biological phosphorus removal process.

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