OPTIMIZATION OF BIOGAS PRODUCTION FROM POULTRY MANURE WASTEWATER IN 250 ML FLASKS

2015 ◽  
Vol 75 (1) ◽  
Author(s):  
Choo Wei Chun ◽  
Nina Farhana Mohd Jamaludin ◽  
Norazwina Zainol
Keyword(s):  
Reaction Time ◽  
Biogas Production ◽  
Production Condition ◽  
Poultry Manure ◽  
Oxygen Demand ◽  
Production Performance ◽  
Quadratic Model ◽  
Biogas Yield ◽  
Predicted Values ◽  
Central Composite

A research was conducted on anaerobic digestion from poultry manure wastewater to produce biogas. This research was considered as a triumph to the concept of waste-to-wealth. The poultry manure collected was characterized and pre-treated to remove excessive ammonia-N which caused inhibition to the biogas production. Central Composite Design (CCD) with five replicates at centre points was used to investigate the simultaneous effect of the variables: agitation (110-130 rpm) and reaction time (2-4 days) on the biogas production. Then, the experiment was designed and analyzed using Design Expert V7.0 software by applying response surface methodology (RSM) concept.The biogas production performance was evaluated on the basis of biogas yield from initial Chemical Oxygen Demand (COD) and was found ranged from 0.49 to 4.37 mL/g COD. Quadratic model was well fitted (R-squared>0.80) with a confidence level higher than 95 %. The optimum biogas production condition was at agitation: 120 rpm and reaction time: 3.3 days. Under this condition, 4.45 mL/g COD of biogas yield was obtained. This counted for 5.82% error from predicted values.

Screening of Factors Affecting Pre-Treatment by Ammonia-N Removal from Poultry Manure Wastewater by Using Soil Water to Improve Biogas Production

2015 ◽  
Vol 1107 ◽  
pp. 359-364
Author(s):  
Nina Farhana Mohd Jamaludin ◽  
Norazwina Zainol
Keyword(s):  
Reaction Time ◽  
Soil Water ◽  
Treatment Condition ◽  
Biogas Production ◽  
Peat Soil ◽  
Poultry Manure ◽  
Factors Affecting ◽  
Biogas Yield ◽  
N Removal ◽  
Pre Treatment

In this study, best pre-treatment condition of poultry manure wastewater (PMW) was determined from factorial analysis for the purpose of improving biogas production. Five factors were chosen for factorial screening namely: agitation (0 or 200 rpm), reaction time (2 to 5 hours), type of soil (peat soil or poultry farm soil), soil to water ratio (1:1 or 1:4) and PMW to soil water (SW) ratio (1:4 or 2:3). Based on the result, agitation gave highest contribution in pre-treatment of PMW at 38.36% followed by PMW to SW ratio at 29.76% contribution. In term of interaction, agitation and reaction gave the highest contribution to pre-treatment of PMW at 3.33% contribution. The best pre-treatment condition suggested by Design Expert software was using peat soil as source of soil at SW ratio of 1:6, and mixed with PMW at 1:4 ratio without agitation for 5 hours reaction time. Application of this best pre-treatment condition showed improvement in biogas yield by 82 % from 0.0045 L/g COD using untreated PMW to 0.0248 L/g COD using treated PMW.

scholarly journals Optimisation of Biogas Production through Variation of PH, Detention Time and Ratio of Substrate to Water for Rural Utilization

2019 ◽  
Vol 2 (1) ◽  
pp. 52-59 ◽  
Author(s):  
A G Jiya ◽  
U J Ijah ◽  
M Galadima ◽  
U G Akpan
Keyword(s):  
Rural Community ◽  
Numerical Optimization ◽  
Biogas Production ◽  
High Yield ◽  
Input Process ◽  
Domestic Waste ◽  
Detention Time ◽  
Biogas Yield ◽  
Optimal Values ◽  
Central Composite

A response surface methodology (RSM) was utilized in this study for optimisation of biogas production process. The optimal values of process parameter capable of giving a high yield of biogas were established. A biodigester of 20 liters capacity capable of producing biogas from rural household domestic waste was designed, constructed and used in the study. Its major units are the anaerobic and gas collecting units. The process parameters investigated are the pH of the substrate, detention time and ratio of substrate to water while the yield of biogas was used as performance characteristics. The experiment was based on a central composite rotatable design (CCRD). The results revealed that the highest yield of biogas was obtained from a combination of detention time of 30 days, ratio of substrate to water of 1:1 and pH of 7, while the least yield of biogas of 11 cm3 was obtained from combination of detention time of 30 days, ratio of substrate to water of 1:3 and pH of 2. Numerical optimization carried out with the goal of maximizing the biogas yield revealed optimum values of detention time of 40 days, the ratio of substrate and water used; 1:2 and pH of 6.71 for biogas of 771.77 cm3 with the desirability of 0.9850. The detention time had the highest significant effects on the yield of biogas. The results of this study provided standard input process variables capable of yielding the optimum yield of biogas for the rural community.

scholarly journals Evaluation of Anaerobic Digestion of Dairy Wastewater in an Innovative Multi-Section Horizontal Flow Reactor

Energies ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2392 ◽  
Author(s):  
Marcin Dębowski ◽  
Marcin Zieliński ◽  
Marta Kisielewska ◽  
Joanna Kazimierowicz
Keyword(s):  
Wastewater Treatment ◽  
Anaerobic Digestion ◽  
Flow Reactor ◽  
Biogas Production ◽  
Oxygen Demand ◽  
Methane Content ◽  
Dairy Wastewater ◽  
Horizontal Flow ◽  
Organic Loading Rate ◽  
Biogas Yield

The aim of this study was the performance evaluation of anaerobic digestion of dairy wastewater in a multi-section horizontal flow reactor (HFAR) equipped with microwave and ultrasonic generators to stimulate biochemical processes. The effects of increasing organic loading rate (OLR) ranging from 1.0 g chemical oxygen demand (COD)/L·d to 4.0 g COD/L·d on treatment performance, biogas production, and percentage of methane yield were determined. The highest organic compounds removals (about 85% as COD and total organic carbon—TOC) were obtained at OLR of 1.0–2.0 g COD/L·d. The highest biogas yield of 0.33 ± 0.03 L/g COD removed and methane content in biogas of 68.1 ± 5.8% were recorded at OLR of 1.0 g COD/L·d, while at OLR of 2.0 g COD/L·d it was 0.31 ± 0.02 L/COD removed and 66.3 ± 5.7%, respectively. Increasing of the OLR led to a reduction in biogas productivity as well as a decrease in methane content in biogas. The best technological effects were recorded in series with an operating mode of ultrasonic generators of 2 min work/28 min break. More intensive sonication reduced the efficiency of anaerobic digestion of dairy wastewater as well as biogas production. A low nutrient removal efficiency was observed in all tested series of the experiment, which ranged from 2.04 ± 0.38 to 4.59 ± 0.68% for phosphorus and from 9.67 ± 3.36 to 20.36 ± 0.32% for nitrogen. The effects obtained in the study (referring to the efficiency of wastewater treatment, biogas production, as well as to the results of economic analysis) proved that the HFAR can be competitive to existing industrial technologies for food wastewater treatment.

scholarly journals Performance of Anaerobic Digestion of Chicken Manure Under Gradually Elevated Organic Loading Rates

2019 ◽  
Vol 16 (12) ◽  
pp. 2239 ◽  
Author(s):  
Fei Wang ◽  
Mengfu Pei ◽  
Ling Qiu ◽  
Yiqing Yao ◽  
Congguang Zhang ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Biogas Production ◽  
Poultry Manure ◽  
Ammonia Nitrogen ◽  
Methane Content ◽  
Chicken Manure ◽  
Continuous Stirred Tank Reactor ◽  
Organic Loading ◽  
Biogas Yield ◽  
Loading Rates

Poultry manure is the main source of agricultural and rural non-point source pollution, and its effective disposal through anaerobic digestion (AD) is of great significance; meanwhile, the high nitrogen content of chicken manure makes it a typical feedstock for anaerobic digestion. The performance of chicken-manure-based AD at gradient organic loading rates (OLRs) in a continuous stirred tank reactor (CSTR) was investigated herein. The whole AD process was divided into five stages according to different OLRs, and it lasted for 150 days. The results showed that the biogas yield increased with increasing OLR, which was based on the volatile solids (VS), before reaching up to 11.5 g VS/(L·d), while the methane content was kept relatively stable and maintained at approximately 60%. However, when the VS was further increased to 11.5 g VS/(L·d), the total ammonia nitrogen (TAN), pH, and alkalinity (CaCO3) rose to 2560 mg·L−1, 8.2, and 15,000 mg·L−1, respectively, while the volumetric biogas production rate (VBPR), methane content, and VS removal efficiency decreased to 0.30 L·(L·d)−1, 45%, and 40%, respectively. Therefore, the AD performance immediately deteriorated and ammonia inhibition occurred. Further analysis demonstrated that the microbial biomass yield and concentrations dropped dramatically in this period. These results indicated that the AD stayed steady when the OLR was lower than 11.5 g VS/(L·d); this also provides valuable information for improving the efficiency and stability of AD of a nitrogen-rich substrate.

scholarly journals Application of Electrocoagulation for the Removal of Color from Institutional Wastewater: Analysis with Response Surface Methodology

2021 ◽  
Vol 9 (2) ◽  
pp. 470-479
Keyword(s):  
Response Surface Methodology ◽  
Reaction Time ◽  
Response Surface ◽  
The Other ◽  
Quadratic Model ◽  
Operational Parameters ◽  
Electrode Combination ◽  
Electrocoagulation Process ◽  
Percentage Removal ◽  
Central Composite

The removal percentage of color from institutional wastewater was studied using an electrocoagulation process with different electrode combination at the anode and cathode. This was done by considering operational parameters such as pH at (3, 6 and 9), current at (0.03A, 0.06A and 0.09A) and reaction time at (20, 40 and 60 minutes). When electrode combined in the form of Al-Al (anode-Cathode/Cathode-Anode) and Fe-Fe (anode-Cathode/Cathode-Anode) the percentage removal of color was up to 95.50% and 97.24% respectively. On the other hand around 98.03% and 91.95% of color was removed when Al-Fe (Anode-Cathode) and Fe-Al (Anode-Cathode) combined at pH 9 and 60 minutes of reaction time respectively. Central composite design from response surface methodology was used up to analysis the statistical and mathematical data based on experimental results such as the model was significant for all electrode combinations. Similarly a quadratic model was used for further study of operational effects on the removal (%) of color from institutional wastewater. The value of coefficient of the determination (R2) also indicated the model was a good fit as well as optimization was done by Response Surface Methodology.

scholarly journals Enhanced biogas production potential of microalgae and swine wastewater using co-digestion and alkaline pretreatment

2018 ◽  
Vol 78 (1) ◽  
pp. 92-102 ◽  
Author(s):  
K. Panyaping ◽  
R. Khiewwijit ◽  
P. Wongpankamol
Keyword(s):  
Biogas Production ◽  
Oxygen Demand ◽  
Electrical Energy ◽  
Pilot Scale ◽  
Major Effect ◽  
Alkaline Pretreatment ◽  
Swine Wastewater ◽  
Biogas Yield ◽  
Volatile Solids ◽  
Vs Removal

Abstract Biogas yield obtained from anaerobic digestion of swine wastewater (SWW) needs to be increased to produce electrical energy. To enhance biogas and prevent pollution, use of mixed culture microalgae grown in wastewater (MWW) with SWW has attracted a lot of interest. This research was focused on the possibility of utilizing MWW. Six experiments using raw SWW and MWW, and their co-digestion were conducted on a laboratory scale in one-litre reactors with the ratio of inoculum and substrate of 70:30 under without and with alkaline pretreatment (using 3% NaOH for pH adjustment every 15 min at pH 11 for 3 h). The results showed that co-digestion had the major effect on increasing biogas and methane yields (0.735 and 0.326 m3/kg of volatile solids (VS) removed), and the highest chemical oxygen demand and VS removal (60.29% and 63.17%). For pretreatment, the effect of ammonia inhibition at a high pH of 11 had more influence on biodegradation than the effect of destruction of MWW's cell walls, resulting in a low biogas production of pretreated MWW and pretreated co-digestion. These findings affirm the potential of co-digestion, and the possibility of using both single and co-substrate MWW. Pretreatment could be improved at a lower alkaline pH condition. A pilot scale of co-digestion should be performed.

scholarly journals Influence of Aerobic Pretreatment of Poultry Manure on the Biogas Production Process

Processes ◽  
2020 ◽  
Vol 8 (9) ◽  
pp. 1109
Author(s):  
Mantas Rubežius ◽  
Kęstutis Venslauskas ◽  
Kęstutis Navickas ◽  
Rolandas Bleizgys
Keyword(s):  
Production Process ◽  
Biogas Production ◽  
Organic Matter Content ◽  
Poultry Manure ◽  
Treatment Method ◽  
Matter Content ◽  
Control Group ◽  
Biogas Yield ◽  
High Concentrations ◽  
Positive Effect

Anaerobic digestion of poultry manure is a potentially-sustainable means of stabilizing this waste while generating biogas. However, technical, and environmental protection challenges remain, including high concentrations of ammonia, low C/N ratios, limited digestibility of bedding, and questions about transformation of nutrients during digestion. This study evaluated the effect of primary biological treatment of poultry manure on the biogas production process and reduction of ammonia emissions. Biogas yield from organic matter content in the aerobic pretreatment groups was 13.96% higher than that of the control group. Biogas production analysis showed that aerobic pretreatment of poultry manure has a positive effect on biogas composition; methane concentration increases by 6.94–7.97% after pretreatment. In comparison with the control group, NH3 emissions after aerobic pretreatment decreased from 3.37% (aerobic pretreatment without biological additives) to 33.89% (aerobic pretreatment with biological additives), depending on treatment method.

scholarly journals Modeling and optimizing electro-persulfate processes using Fe and Al electrodes for paper industry wastewater treatment

2020 ◽  
Vol 81 (2) ◽  
pp. 345-357 ◽  
Author(s):  
Gamze Varank ◽  
Senem Yazici Guvenc ◽  
Ahmet Demir ◽  
Nihal Kavan ◽  
Nurten Donmez ◽  
...  
Keyword(s):  
Reaction Time ◽  
Design Method ◽  
Paper Industry ◽  
Oxygen Demand ◽  
Correlation Coefficients ◽  
Cod Removal ◽  
Contaminant Removal ◽  
Optimization Of Process Parameters ◽  
Appropriate Treatment ◽  
Central Composite

Abstract In this study, the treatment of paper industry wastewaters by the electrocoagulation (EC) process with a strong oxidant, persulfate addition, was investigated. Persulfate was activated by dissolution of Fe and Al from electrodes during the process. Central composite design method, being one of the response surface methods, was applied for the optimization of process parameters and the development of a mathematical model for chemical oxygen demand (COD) removal from paper industry wastewaters. The effects of S2O8−2/COD ratio, current, pH, and reaction time, being the variables of process, were assessed on the efficiency of contaminant removal. For COD removal in EC processes in which Fe and Al electrodes were used, the model's correlation coefficients (R2) were determined as 90.14% and 87.46%, respectively. As the result of experimental study actualized under optimum conditions determined by the model in order to obtain maximum contaminant removal, COD removal efficiencies were determined as 63.5% and 72.8% respectively for the Fe electrode (S2O8−2/COD ratio: 1.25, current: 4.14 A, pH: 6, and reaction time: 5 minutes), and the Al electrode (S2O8−2/COD ratio: 0.5, current: 4.25 A, pH: 7.25, and reaction time: 25 minutes). Electro-activated persulfate process is an appropriate treatment alternative for COD removal from paper industry wastewaters.

Optimization of photo-Fenton process of RO concentrated coking wastewater using response surface methodology

2012 ◽  
Vol 66 (4) ◽  
pp. 816-823 ◽  
Author(s):  
Zhang Huiqing ◽  
Ye Chunsong ◽  
Zhang Xian ◽  
Yang Fan ◽  
Yang Jun ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Ph Value ◽  
Oxygen Demand ◽  
Operating Conditions ◽  
Quadratic Model ◽  
Coking Wastewater ◽  
Fenton Process ◽  
Predicted Values ◽  
Optimized Conditions

The objective of this study was aimed at investigating the removal of chemical oxygen demand (COD) from reverse osmosis (RO) concentrated coking wastewater by the photo-Fenton process. The optimum extraction conditions for the photo-Fenton process by Box–Behnken design (BBD) and response surface methodology (RSM) to establish a predictive polynomial quadratic model were discussed based on a single factor test. Optimized parameters validated by the analysis of variances (ANOVA) were found to be H2O2 concentration of 345.2 mg/L, pH value of 4.1 and reaction time of 103.5 minutes under ultraviolet irradiation. The experimental results of the COD removal under the optimized conditions presented better agreement with the predicted values with deviation error of 3.2%. The results confirmed that RSM based on BBD was a suitable method to optimize the operating conditions of RO concentrated coking wastewater.

Sign in / Sign up

Export Citation Format

Share Document