Effect of ultrasonic and alkaline pretreatment on sludge degradation and electricity generation by microbial fuel cell

2010 ◽  
Vol 61 (11) ◽  
pp. 2915-2921 ◽  
Author(s):  
J. Q. Jiang ◽  
Q. L. Zhao ◽  
K. Wang ◽  
L. L. Wei ◽  
G. D. Zhang ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Chemical Oxygen Demand ◽  
Microbial Fuel Cell ◽  
Power Output ◽  
Electricity Generation ◽  
Oxygen Demand ◽  
Alkaline Pretreatment ◽  
Ultrasonic Pretreatment ◽  
Volatile Solids ◽  
Soluble Chemical Oxygen Demand

Both ultrasonic and alkaline pretreatment of excess sewage sludge were investigated to enhance organic degradation and electricity generation from sludge by the subsequent microbial fuel cell (MFC). The ultrasonic pretreatment showed that the degree of sludge disintegration was directly related to the energy input, ultrasonic density and duration. Alkaline pretreatment demonstrated that more soluble organic matters were released from the sludge with more NaOH dose and longer reaction time, and the degree of sludge disintegration within 30 min accounted for 45–76% of that for 24 h. When ultrasonic and alkaline pretreatment were combined, the released chemical oxygen demand (COD) was higher than those with ultrasonic or alkaline pretreatment alone. Ultrasonic and alkaline (pH=11) pretreatment could enhance electricity generation from sludge by the subsequent MFC, resulting in more degradation of total COD (TCOD) and volatile solids (VS). Slight change in power output from the MFC was observed due to the higher soluble chemical oxygen demand (SCOD) in the pretreated sludge. By using the combined ultrasonic and alkaline pretreatment of sludge, the removal efficiencies of TCOD and VS were increased from 27.1% to 61.0% and 35.2% to 62.9% in comparison with raw sludge, respectively, and the power output in MFC was slightly increased from 10.3 W/m3 to 12.5 W/m3.

Performance of denitrifying microbial fuel cell subjected to variation in pH, COD concentration and external resistance

2013 ◽  
Vol 68 (1) ◽  
pp. 250-256 ◽  
Author(s):  
Jin-Tao Li ◽  
Shao-Hui Zhang ◽  
Yu-Mei Hua
Keyword(s):  
Fuel Cell ◽  
Chemical Oxygen Demand ◽  
Microbial Fuel Cell ◽  
Electricity Generation ◽  
Oxygen Demand ◽  
Pollutant Removal ◽  
Acidic Ph ◽  
External Resistance ◽  
Weakly Alkaline ◽  
Effects Of Ph

The effects of pH, chemical oxygen demand (COD) concentration and external resistance on denitrifying microbial fuel cell were evaluated in terms of electricity generation characteristics and pollutant removal performance. The results showed that anodic influent with weakly alkaline or neutral pH and cathodic influent with weakly acidic pH favored pollutant removal and electricity generation. The suitable influent pH of the anode and cathode were found to be 7.5–8.0 and 6.0–6.5, respectively. In the presence of sufficient nitrate in the cathode, higher influent COD concentration led to more electricity generation and greater pollutant removal rates. With an anodic influent pH of 8.0 and a cathodic influent pH of 6.0, an influent COD concentration of 400 mg/L was deemed to be appropriate. Low external resistance favored nitrate and COD removal. The results suggest that operation of denitrifying microbial fuel cell at a lower external resistance would be desirable for pollutant removal but not electricity generation.

scholarly journals Kinerja Membran Komposit Kitosan-Karagenan pada Sistem Microbial Fuel Cell dalam menghasilkan Biolistrik dari Limbah Pemindangan Ikan

2020 ◽  
Vol 23 (1) ◽  
pp. 137-146
Author(s):  
Bustami Ibrahim ◽  
Uju ◽  
Agus Muhamad Soleh
Keyword(s):  
Fuel Cell ◽  
Chemical Oxygen Demand ◽  
Microbial Fuel Cell ◽  
Oxygen Demand

Microbial fuel cell (MFC) merupakan suatu teknologi yang memanfaatkan mikroba untuk mendegradasi bahan organik dan anorganik menjadi energi listrik, dapat dilakukan menggunakan sistem satu bejana atau dua bejana. Sistem MFC dua bejana menggunakan membran penukar proton yang berfungsi untuk mengalirkan proton yang dihasilkan dari ruang anoda ke ruang katoda, salah satu alternatif membran yang digunakan yaitu komposit kitosan-karagenan. Penelitian ini bertujuan untuk menentukan perbandingan komposit kitosan-karagenan sebagai membran penukar proton pada MFC, menentukan kinerja MFC dalam menghasilkan elektrisitas, serta menentukan kinerja penurunan beban polutan limbah cair pada MFC. Nilai elektrisitas MFC diukur menggunakan multimeter dengan parameter yang diuji adalah tegangan listrik, serta arus listrik. Parameter uji yang digunakan untuk mengukur penurunan beban polutan limbah cair adalah chemical oxygen demand (COD), biologycal oxygen demand (BOD) dan total amonia nitrogen (TAN). Membran komposit kitosan-karagenan dibuat dengan perlakuan perbedaan komposisi kitosan dan karagenan 1:1; 1,5:1; 3:1 (v/v). Perbedaan rasio kitosan dan karagenan pada membran komposit kitosan-karagenan memberikan pengaruh terhadap sifat mekanik membran, nilai elektrisitas MFC, serta beban polutan cair pada MFC. Membran komposit kitosan-karagenan dengan perbandingan 1:1 menghasilkan nilai konduktivitas proton tertinggi sebesar 1,15x10-3 S/cm, kuat tarik tertinggi 7,047 MPa, tegangan listrik 0,97 V, arus 7,02 mA, serta daya listrik 6,84 mW. Nilai COD, BOD, serta TAN limbah cair pemindangan ikan mengalami penurunan sebesar 90%, 76% dan 32%.

Effect of ultrasonic pretreatment of the dairy manure on the electricity generation of microbial fuel cell

2018 ◽  
Vol 129 ◽  
pp. 44-49 ◽  
Author(s):  
Jianguo Shen ◽  
Chengxian Wang ◽  
Yongping Liu ◽  
Chunguang Hu ◽  
Yanjun Xin ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Electricity Generation ◽  
Dairy Manure ◽  
Ultrasonic Pretreatment

Freezing/thawing effect on sewage sludge degradation and electricity generation in microbial fuel cell

2014 ◽  
Vol 70 (3) ◽  
pp. 444-449 ◽  
Author(s):  
Yuejia Chen ◽  
Junqiu Jiang ◽  
Qingliang Zhao
Keyword(s):  
Organic Matter ◽  
Wastewater Treatment ◽  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Electricity Generation ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Ammonium Nitrogen ◽  
Organic Matter Degradation ◽  
Freezing Time

The effect of sludge freezing/thawing on its disintegration and subsequent use as substrate in a microbial fuel cell (MFC) was investigated to enhance organic matter degradation and electricity generation. Experimental results indicated that long freezing time (more than 48 h) was effective in disintegrating the sludge collected from the secondary sedimentation tank of a wastewater treatment plant. Freezing/thawing pretreatment could enhance the degradation of total chemical oxygen demand (COD) and electricity generation in MFC due to the higher concentration of soluble COD and ammonium nitrogen available in the pretreated sludge. The removal efficiency of total COD was increased from 25.3% (raw sludge as substrate) to 66.2% and the maximum power output was increased from 8.9 (raw sludge as substrate) to 10.2 W/m3 in MFC.

scholarly journals Removal of chemical oxygen demand (COD) and heavy metals by catalytic ozonation–microbial fuel cell and Acidithiobacillus ferrooxidans leaching in flotation wastewater (FW)

2019 ◽  
Vol 79 (12) ◽  
pp. 2328-2336 ◽  
Author(s):  
Zhenzhong Bian ◽  
Yali Feng ◽  
Haoran Li ◽  
Zhuwei Du
Keyword(s):  
Heavy Metals ◽  
Fuel Cell ◽  
Chemical Oxygen Demand ◽  
Microbial Fuel Cell ◽  
Acidithiobacillus Ferrooxidans ◽  
Platinum Catalyst ◽  
Oxygen Demand ◽  
Catalytic Ozonation ◽  
Standard Chinese ◽  
Leaching Parameters

Abstract A catalytic ozonation–microbial fuel cell and Acidithiobacillus ferrooxidans leaching process was used in treating flotation wastewater to remove chemical oxygen demand (COD) and heavy metals in this study. The results indicated that when adding 1 g/L of manganese/modified activated carbon catalyst and 1.5 g/min ozone flow, the COD could be degraded from 2,043.67 mg/L to 711.4 mg/L. After that, the COD could continue decreasing down to 72.56 mg/L through an air-cathode single chamber microbial fuel cell (SCMFCs), coated with 0.4 mg/cm2 platinum catalyst, after 15 days. Meanwhile, the maximum voltages and the ultimate power density of the SCMFCs reached 378.96 mV and 7,608.35 mW/m2, respectively. For filter residue, when 1.2 g/L Fe3+, 10% (m/v) filter residue, and 10% Acidithiobacillus ferrooxidans were added, the copper leaching rate could reach 92.69% after 7 days if the pH values were adjusted to 1.9. Furthermore, the other heavy metals were also decreased to a level lower than the pollution control standard (Chinese standard GB3838-2002). The leaching parameters in terms of pH, redox potential, and cyclic voltammetry showed that the addition of an appropriate concentration of Fe3+ to the leaching systems was beneficial to copper dissolution.

scholarly journals Estimation of total energy requirement for sewage treatment by a microbial fuel cell with a one-meter air-cathode assuming Michaelis–Menten COD degradation

RSC Advances ◽  
2021 ◽  
Vol 11 (33) ◽  
pp. 20036-20045
Author(s):  
Taiki Yamane ◽  
Naoko Yoshida ◽  
Mari Sugioka
Keyword(s):  
Fuel Cell ◽  
Chemical Oxygen Demand ◽  
Total Energy ◽  
Microbial Fuel Cell ◽  
Energy Requirement ◽  
Sewage Treatment ◽  
Oxygen Demand ◽  
Air Cathode

Calculations of chemical oxygen demand (COD) degradation in sewage by a microbial fuel cell (MFC) were used to estimate the total energy required for treatment of the sewage.

scholarly journals Pengolahan Limbah Cair Organik dengan Microbial Fuel Cell

2014 ◽  
Vol 10 (2) ◽  
Author(s):  
Wahyu Rinaldi ◽  
Yudha Nurdin ◽  
Syahiddin Syahiddin ◽  
Wulan Windari ◽  
Cut Putri Agustina
Keyword(s):  
Fuel Cell ◽  
Chemical Oxygen Demand ◽  
Microbial Fuel Cell ◽  
Oxygen Demand

Penelitian ini mengusulkan sebuah prototipe reaktor microbial fuel cell (MFC) tanpa membran beraliran kontinyu. Dinding Reaktor dibuat dari pipa PVC dan elektroda dari serat karbon. Mikroba yang ditambatkan di anoda bersumber dari larutan FloTank®. Pada penelitian ini digunakan limbah organik artifisial yang dibuat dari glukosa monohidrat dengan konsentrasi 250 mg/L COD. Waktu tinggal limbah divariasikan pada 0,5; 1; 1,5; dan 2 hari. Nilai rata-rata daya listrik yang dihasilkan untuk waktu tinggal limbah 0,5; 1; 1,5; dan 2 hari berturut-turut adalah 38,02; 43,01; 45,35; 46,71 mW/m2, dan daya volumetrik yang dihasilkan adalah 111,25; 125,86; 132,71; dan 136,69 mW/m3. Persentase penurunan Chemical Oxygen Demand (COD) limbah paling tinggi diperoleh pada waktu tinggal 1,5 hari yaitu sebesar 32,26%.

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