Operational parameters influenced on biogas production in zeolite/anaerobic baffled reactor for compost leachate treatment

2021 ◽  
Author(s):  
Meghdad Pirsaheb ◽  
Hiwa Hossaini ◽  
Jila Amini
Keyword(s):  
Biogas Production ◽  
Operational Parameters ◽  
Leachate Treatment ◽  
Anaerobic Baffled Reactor ◽  
Compost Leachate

scholarly journals Operational Parameters of Biogas Plants: A Review and Evaluation Study

Energies ◽  
2020 ◽  
Vol 13 (15) ◽  
pp. 3761 ◽  
Author(s):  
Abdullah Nsair ◽  
Senem Onen Cinar ◽  
Ayah Alassali ◽  
Hani Abu Qdais ◽  
Kerstin Kuchta
Keyword(s):  
Anaerobic Digestion ◽  
Review Paper ◽  
Biogas Production ◽  
Evaluation Study ◽  
Biogas Plant ◽  
Operational Parameters ◽  
Digestion Process ◽  
Design Considerations ◽  
Biogas Plants ◽  
Main Factors

The biogas production technology has improved over the last years for the aim of reducing the costs of the process, increasing the biogas yields, and minimizing the greenhouse gas emissions. To obtain a stable and efficient biogas production, there are several design considerations and operational parameters to be taken into account. Besides, adapting the process to unanticipated conditions can be achieved by adequate monitoring of various operational parameters. This paper reviews the research that has been conducted over the last years. This review paper summarizes the developments in biogas design and operation, while highlighting the main factors that affect the efficiency of the anaerobic digestion process. The study’s outcomes revealed that the optimum operational values of the main parameters may vary from one biogas plant to another. Additionally, the negative conditions that should be avoided while operating a biogas plant were identified.

scholarly journals Pretreatment of Animal Manure Biomass to Improve Biogas Production: A Review

Energies ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3573 ◽  
Author(s):  
Meneses-Quelal Orlando ◽  
Velázquez-Martí Borja
Keyword(s):  
Anaerobic Digestion ◽  
Methane Production ◽  
Biogas Production ◽  
Poultry Manure ◽  
Animal Manure ◽  
Methane Yield ◽  
Operational Parameters ◽  
Advantages And Disadvantages ◽  
Physical Chemical ◽  
Chemical Pretreatments

The objective of this research is to present a review of the current technologies and pretreatments used in the fermentation of cow, pig and poultry manure. Pretreatment techniques were classified into physical, chemical, physicochemical, and biological groups. Various aspects of these different pretreatment approaches are discussed in this review. The advantages and disadvantages of its applicability are highlighted since the effects of pretreatments are complex and generally depend on the characteristics of the animal manure and the operational parameters. Biological pretreatments were shown to improve methane production from animal manure by 74%, chemical pretreatments by 45%, heat pretreatments by 41% and physical pretreatments by 30%. In general, pretreatments improve anaerobic digestion of the lignocellulosic content of animal manure and, therefore, increase methane yield.

Compost leachate treatment by a pilot-scale subsurface horizontal flow constructed wetland

2017 ◽  
Vol 105 ◽  
pp. 7-14 ◽  
Author(s):  
Reza Bakhshoodeh ◽  
Nadali Alavi ◽  
Monireh Majlesi ◽  
Pooya Paydary
Keyword(s):  
Constructed Wetland ◽  
Pilot Scale ◽  
Horizontal Flow ◽  
Leachate Treatment ◽  
Compost Leachate

scholarly journals Compost leachate treatment using polyaluminium chloride and nanofiltration

2017 ◽  
Vol 15 (1) ◽  
pp. 123-128 ◽  
Author(s):  
Marjana Simonič
Keyword(s):  
Zeta Potential ◽  
Isoelectric Point ◽  
Oxygen Demand ◽  
Treatment Method ◽  
Aluminium Chloride ◽  
Leachate Treatment ◽  
Physico Chemical ◽  
Pre Treatment ◽  
Ph Range ◽  
Compost Leachate

AbstractLaboratory scale filtration tests utilizing leachate were conducted to investigate fouling and filtration performance of nanofiltration membranes. The work presented in this study is conducted on real samples rather than model water. Physico-chemical analyses showed that the leachate contained a lot of organic substances, exceeding 20000 mg/L O2 expressed as chemical oxygen demand. Proper pre-treatment method must be chosen in order to reduce fouling index. Coagulation pre-treatment using poly-aluminium chloride was chosen. Two thin film polysulfone membranes were used, purchased by Osmonic Desal. The focus of this research is to assess the influence of the particle size and zeta-potential of the colloidal fraction in leachate on nanofiltration performance. The isoelectric point of both membranes was 4.7 and 4.3, respectively. The fouled membranes were negatively charged over the pH range with isoelectric point shifting to the left (lower pH) indicating the foulant material mainly not charged. It was confirmed by its zeta-potential, measured at -2 mV.

scholarly journals Computer Simulation in Predicting Biochemical Processes and Energy Balance at WWTPs

2018 ◽  
Vol 30 ◽  
pp. 03007 ◽  
Author(s):  
Jakub Drewnowski ◽  
Ewa Zaborowska ◽  
Carmen Hernandez De Vega
Keyword(s):  
Computer Simulation ◽  
Energy Balance ◽  
Biogas Production ◽  
Pollutant Emissions ◽  
Actual Process ◽  
Operational Parameters ◽  
Biochemical Processes ◽  
Batch Tests ◽  
Operation Process ◽  
And Control

Nowadays, the use of mathematical models and computer simulation allow analysis of many different technological solutions as well as testing various scenarios in a short time and at low financial budget in order to simulate the scenario under typical conditions for the real system and help to find the best solution in design or operation process. The aim of the study was to evaluate different concepts of biochemical processes and energy balance modelling using a simulation platform GPS-x and a comprehensive model Mantis2. The paper presents the example of calibration and validation processes in the biological reactor as well as scenarios showing an influence of operational parameters on the WWTP energy balance. The results of batch tests and full-scale campaign obtained in the former work were used to predict biochemical and operational parameters in a newly developed plant model. The model was extended with sludge treatment devices, including anaerobic digester. Primary sludge removal efficiency was found as a significant factor determining biogas production and further renewable energy production in cogeneration. Water and wastewater utilities, which run and control WWTP, are interested in optimizing the process in order to save environment, their budget and decrease the pollutant emissions to water and air. In this context, computer simulation can be the easiest and very useful tool to improve the efficiency without interfering in the actual process performance.

scholarly journals Anaerobic digestion of dried/shredded food waste in a periodic anaerobic baffled reactor

2021 ◽  
Author(s):  
D. Mathioudakis ◽  
I. Michalopoulos ◽  
K. Kalogeropoulos ◽  
K. Papadopoulou ◽  
G. Lyberatos
Keyword(s):  
Food Waste ◽  
High Rate ◽  
Upflow Anaerobic Sludge Blanket ◽  
Organic Loading Rate ◽  
Anaerobic Sludge ◽  
Operational Parameters ◽  
Operational Parameter ◽  
Anaerobic Baffled Reactor ◽  
Food Residue ◽  
The Impact

Abstract The objective of the current work is to study the impact of the operational parameters' variation (HRT, OLR and T) on biomethane productivity in a Periodic Anaerobic Baffled Reactor (PABR). The feedstock used was a biomass product named FORBI (Food Residue Biomass), which is dried and shredded source-separated household food waste. The Periodic Anaerobic Baffled Reactor (PABR) is an innovative, high-rate bioreactor. Apart from the Hydraulic Retention Time (HRT) and the Organic Loading Rate (OLR), an important operational parameter is the Switching Period (T) of the feeding compartment: when T is high, the bioreactor operation is similar to an Anaerobic baffled reactor (ABR), while when it is low, the operation approaches that of an Upflow Anaerobic Sludge Blanket Reactor (UASBR). Nine distinct experimental phases were conducted, during which the operational parameters of the PABR were consecutively modified: the HRT varied from 9 to 2.5 days, T between 2 days and 1 and finally the OLR from 1.24 gCOD/Lbioreactor*d to 8.08 gCOD/Lbioreactor*d. The maximum biomethane yield was 384 LCH4/kgFORBI corresponding to the operation at HRT = 5 d, OLR = 2.14 gCOD/Lbioreactor*d and T = 2 days. Similar efficiency (333 LCH4/kg­FORBI) was achieved at higher OLR (4.53 gCOD/Lbioreactor*d).

scholarly journals Process Simulation and Optimization of Anaerobic Co-Digestion

2021 ◽  
Vol 9 ◽  
Author(s):  
Abrar Inayat ◽  
Shams Forruque Ahmed ◽  
F. Djavanroodi ◽  
Fatima Al-Ali ◽  
Mira Alsallani ◽  
...  
Keyword(s):  
Process Simulation ◽  
Waste Treatment ◽  
Production Systems ◽  
Biogas Production ◽  
System Optimization ◽  
Design Development ◽  
Operational Parameters ◽  
Simulation And Optimization ◽  
Optimization Parameters ◽  
Biogas Output

Anaerobic digestion (AD) is an established method that has been extensively utilized for waste management, waste treatment, and biogas production. Anaerobic co-digestion (AcoD) is regarded as a practical approach to address substrate characteristics and system optimization issues. The distinction between AcoD and mono-digestion is that AcoD has a higher organic loading and significant substrate composition variation. There are many factors involved in AcoD which affect the biogas plant’s production ability and performance. Using response surface methodology (RSM) to forecast the optimal conditions for maximum biogas output, this article provides an overview of the different operational parameters in the AcoD process, modeling of the AcoD process, and overall process optimization. Standard software used for AcoD process simulation are Aspen Plus, SuperPro Designer, BioWin, CFD, and MATLAB. Review addresses design, development, and optimization frameworks for biogas production systems that take numerous aspects into account. The most significant AcoD optimization parameters include temperature, co-substrate concentration, inoculum ratio (percent), and C/N ratio.

scholarly journals Carbamazepine removal from low-strength municipal wastewater using a combined UASB-MBR treatment system

2021 ◽  
Vol 83 (8) ◽  
pp. 1920-1931
Author(s):  
M. J. Moya-Llamas ◽  
A. Trapote ◽  
D. Prats
Keyword(s):  
Volatile Fatty Acids ◽  
Municipal Wastewater ◽  
Biogas Production ◽  
Upflow Anaerobic Sludge Blanket ◽  
Uasb Reactor ◽  
Organic Load ◽  
Anaerobic Sludge ◽  
Operational Parameters ◽  
Low Strength ◽  
The Impact

Abstract An Upflow Anaerobic Sludge Blanket reactor combined with a two-stage membrane bioreactor were operated for 193 days in order to evaluate the biological removal of carbamazepine (CBZ) from low-strength municipal wastewater. The system worked in three different organic load stages (0.7 ± 0.1 kg COD·m−3·d−1, 0.4 ± 0.1 kg COD·m−3·d−1 and 0.1 ± 0.0 kg COD·m−3·d−1) to assess the impact of the influent OLR on operational parameters such as anaerobic and aerobic sludge retention time (SRT), acidity, volatile fatty acids (VFAs), biomass activity or biogas production. The highest carbamazepine removals were achieved during the anaerobic stage (UASB reactor), reaching averages of 48.9%, 48.0% and 38.2% operating at high, medium and low OLR, respectively. The aerobic treatment (MBR) served as post-treatment, improving the removals, and the global UASB-MBR system reached averages of 70.0%, 59.6% and 49.8% when the influent was at medium and low OLR, respectively. The results demonstrate the potential of combined biological systems on the removal of recalcitrant pharmaceuticals.

scholarly journals Biogas Production through Co-Digestion of Olive Mill with Municipal Sewage Sludge and Cow Manure

2021 ◽  
Vol 20 (2) ◽  
pp. 1-11
Author(s):  
Said Al Rabadi ◽  
◽  
Kamel Al-Zboon ◽  
Moayyad Shawaqfah ◽  
Rebhi Damseh ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Biogas Production ◽  
Batch Reactor ◽  
Anaerobic Treatment ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Experimental Investigations ◽  
Cow Manure ◽  
Operational Parameters ◽  
Olive Mill

The treatment of olive mill (OM) residues from agricultural facilities is a daunting challenge since tremendous amounts are disposed per annum that should be treated. One of the promising treatment methods is the anaerobic methanogenic digestion of OM residues. In current investigations, the anaerobic digestion of the OM substrate is enhanced through mixing its slurries with sewage sludge (SS) or with cow manure (C), which consists of the kernels for the digestion process. Besides feedstock, other operational parameters such as hydraulic retention time (HRT), temperature and pH have a great impact on the biogas production rate and quality. Experimental investigations were conducted by means of the anaerobic biodegradation of the substrate for OM-SS and -C using a batch reactor under mesophilic conditions and foreseen HRT for 30 days. Almost neutral pH values of 7.4-7.6 were found for the anaerobic treatment of the substrate for OM-SS, and a slightly acidic pH in the range of 4.8-5.3 was found for the anaerobic treatment of the substrate for OM-C. The results revealed that the biogas production for OM-SS and -C exceeded 0.07 and 0.31 LBiogas/(LFerm·day), respectively. Regarding the COD reduction, its removal efficiency was obtained as 46.1 and 53.8% for OM-SS and -C respectively. For economic concerns, significant methane yields were attained as 56.8 and 115.8 [LCH4/kgCOD] for the OM-SS and -C substrates, respectively. In virtue of these remarkable merits, anaerobic methanogenic digestion should be adapted to a commercial scale for the treatment and biogas production of OM residues.

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