The influence of the total solid content on the stability of dry-thermophilic anaerobic digestion of rice straw and pig manure

2018 ◽  
Vol 76 ◽  
pp. 350-356 ◽  
Author(s):  
Shohei Riya ◽  
Kazuhiro Suzuki ◽  
Lingyu Meng ◽  
Sheng Zhou ◽  
Akihiko Terada ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Rice Straw ◽  
Total Solid ◽  
Solid Content ◽  
Pig Manure ◽  
Total Solid Content ◽  
Thermophilic Anaerobic Digestion ◽  
The Stability

Dynamic effect of total solid content, low substrate/inoculum ratio and particle size on solid-state anaerobic digestion

2013 ◽  
Vol 144 ◽  
pp. 141-148 ◽  
Author(s):  
J.-C. Motte ◽  
R. Escudié ◽  
N. Bernet ◽  
J.-P. Delgenes ◽  
J.-P. Steyer ◽  
...  
Keyword(s):  
Particle Size ◽  
Anaerobic Digestion ◽  
Solid State ◽  
Dynamic Effect ◽  
Total Solid ◽  
Solid Content ◽  
Total Solid Content

Variation of the microbial community in thermophilic anaerobic digestion of pig manure mixed with different ratios of rice straw

2016 ◽  
Vol 122 (3) ◽  
pp. 334-340 ◽  
Author(s):  
Sheng Zhou ◽  
Marcell Nikolausz ◽  
Jining Zhang ◽  
Shohei Riya ◽  
Akihiko Terada ◽  
...  
Keyword(s):  
Microbial Community ◽  
Anaerobic Digestion ◽  
Rice Straw ◽  
Pig Manure ◽  
Thermophilic Anaerobic Digestion

scholarly journals Biomethanization of the Mixture of Cattle Manure, Pig Manure and Poultry Manure in Co-Digestion with Waste Peels of Pineapple Fruit and Content of Chicken-Gizzard - Part II: Optimization of Process Variables

2017 ◽  
Vol 11 (1) ◽  
pp. 54-71 ◽  
Author(s):  
O. A. Aworanti ◽  
S. E. Agarry ◽  
O. O. Ogunleye
Keyword(s):  
Response Surface ◽  
Anaerobic Fermentation ◽  
Interactive Effect ◽  
Poultry Manure ◽  
Total Solid ◽  
Solid Content ◽  
Pig Manure ◽  
Process Variables ◽  
Total Solid Content ◽  
Pineapple Fruit

Background: The indiscriminate discharge of industrial waste, agricultural-biomass waste, waste of municipal, domestic and kitchen waste has negatively impacted on the environment and human health. It is very pertinent to reduce these impacts to the barest minimum through conversion of the waste to useful products. The conversion of these wastes to generate alternative energy to fossil fuel through the technology of anaerobic fermentation is one of the viable and more fascinating options for the management of waste. Objective: To investigate the interactive effect and optimization of process parameters of temperature, total solid content and feed/inoculum ratio on the biomethanization of the mixture of cattle manure, pig manure and poultry manure in co-digestion with waste peels of pineapple fruit and content of chicken-gizzard. Method: Full-factorial central composite design of experiment (RCCD) of the response surface method (RSM) was adopted to assess the possible interactive effects of the process variables and the optimal parameters (i.e. optimization) for biogas/biomethane production in an anaerobic digester. Result: The process variables had a significant (P < 0.05) positive and negative interactive effect on the biomethanization process. A second-order quadratic polynomial regression model which is statistically significant (p < 0.0001) was respectively obtained for cumulative biogas yield (CBY), biomethane content (BC) and hydraulic retention time (HRT). Temperature of 55.2°C; total solid content of 6.25%; and feed/inoculums ratio of 1:2 were found to be the optimum values required to attain a predicted optimum values of 6.261 dm3/g CBY, 71.54% BC within a minimum 8 days of HRT. At this optimum process conditions, the experimental observed maximum CBY, and BC with a minimum HRT were found to be 6.217 dm3/g of slurry, 71.10% and 7 days, respectively. Conclusion: Biogas/biomethane generation through co-substrate anaerobic fermentation of animal waste with waste of fruits constitute a reasonable and applicable renewable energy alternative and this can be optimized through response surface methodology.

Effect of pretreatment and total solid content on thermophilic dry anaerobic digestion of Spartina alterniflora

2014 ◽  
Vol 237 ◽  
pp. 209-216 ◽  
Author(s):  
Yue-gan Liang ◽  
Shuai-shuai Yin ◽  
You-bin Si ◽  
Zheng Zheng ◽  
Shou-jun Yuan ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Spartina Alterniflora ◽  
Total Solid ◽  
Solid Content ◽  
Total Solid Content ◽  
Dry Anaerobic Digestion

scholarly journals OZONE PRETREATMENT FOR THE ANAEROBIC DIGESTION OF ORGANIC SOLID WASTE

Detritus ◽  
2020 ◽  
pp. 51-56
Author(s):  
Alessandra Cesaro ◽  
Vincenzo Belgiorno
Keyword(s):  
Anaerobic Digestion ◽  
Solid Waste ◽  
Total Solid ◽  
Solid Content ◽  
Net Energy ◽  
Total Solid Content ◽  
Organic Solid Waste ◽  
Anaerobic Biodegradability ◽  
Organic Solid ◽  
Ozone Pretreatment

The pretreatment of organic solid waste plays a key role in achieving the highest degree of valorization within the anaerobic digestion processes. This work focuses on the use of ozone, discussing its effects, together with particle size and total solid content of waste, on the anaerobic biodegradability of the organic fraction of municipal solid waste (OFMWS). A Design of Experiment (DOE) strategy was used to identify statistically significant factors for further investigation. Experimental results showed that ozonation increased methane production, with the best results being obtained for samples characterized by the highest total solid content. The surplus methane generated by ozonated samples may also result in favourable net energy gain. These outcomes highlight the effectiveness of ozonation when applied in the pretreatment of OFMSW destined to anaerobic digestion and address the need for an energy balance to assess the competitiveness of this technology on an industrial scale.

scholarly journals Anaerobic digestion of food waste at varying operating conditions

Detritus ◽  
2020 ◽  
pp. 99-105
Author(s):  
Bipasyana Dhungana ◽  
Sunil Prasad Lohani
Keyword(s):  
Anaerobic Digestion ◽  
Food Waste ◽  
Continuous Process ◽  
Batch Process ◽  
Total Solid ◽  
Gas Production ◽  
Organic Substrate ◽  
Solid Content ◽  
Operating Conditions ◽  
Total Solid Content

Food waste is one of the major problems contributing to the degradation of the environment, and thus needs serious attention. Among different options, anaerobic digestion is possibly the most effective technique for managing degradable waste, and produce renewable energy and fertilizer. Despite multiple-use and benefits of the technology, its application is limited due to a few technical challenges. This study focuses on the anaerobic digestion of food waste with the addition of different percentages of digested cow manure as inoculum to it, at different total solid content in ambient temperature. Anaerobic digestion of food waste in batch and semi-continuous processes were carried out in three different trials at an average temperature range of 20-26℃: Food waste with 20% inoculum, food waste with 50%, 100%, and 200% inoculum and 10% total solid content in batch process and food waste with 20% inoculum with 6% and 10% total solids content in the semi-continuous process. During each trial, some amount of gas production was observed, however, the gas composition showed a negligible amount of methane production (maximum 13% of CH4). There were two common problems detected in each trial: the inability to complete the methanogenesis process, and instability of the overall process due to the high degradability and acidic nature of food waste. Therefore, this study suggests that the mono digestion of food waste is not a suitable option. However, anaerobic co-digestion of food waste with different organic substrate might provide a favorable condition for stable anaerobic digestion as seen from preliminary results.

APLIKASI PROSES DIGESTASI ANAEROBIK LUMPUR BIOLOGI INSTALASI PENGOLAHAN AIR LIMBAH INDUSTRI KERTAS

2014 ◽  
Vol 4 (02) ◽  
Author(s):  
Rina S. Soetopo ◽  
Sri Purwati ◽  
Henggar Hardiani ◽  
Mukharomah Nur Aini ◽  
Krisna Adhitya Wardhana
Keyword(s):  
Oxygen Demand ◽  
Total Solid ◽  
Pilot Scale ◽  
Organic Content ◽  
Solid Content ◽  
Uasb Reactor ◽  
Anaerobic Sludge ◽  
Organic Loading ◽  
Total Solid Content ◽  
Average Value

A continuous pilot scale study has been conducted to investigate the effectiveness of anaerobic digestion of biological sludge. The sludge has a total solid content of 0.53% - 1.1%, pH of 7.20 to 7.32. Its organic content is about 97 %, The research were conducted in two stages, which are acidification (performed in 3 m3 the Continously Stirred Tank Reactor/CSTR at pH of 5.5 to 6.0) and methanation (performed in 5 m3 the Up Flow Anaerobic Sludge Blanket/UASB reactor at pH 6.5 to 7.0). The retention time (RT) was gradually shortened from 6 days to 1 day for acidification and from 8 days to 2 days for methanation. The results showed that operating the CSTR at the RT of 1 day and the organic loading of 8.23 g Volatile Solid (VS)/m3.day could produce Volatile Fatty Acid (VFA) at an average value of 17.3 g/kg VS.day. Operating the UASB reactor at the RT of 2 days and the organic loading (Chemical Oxygen Demand/COD) of 2.4 kg COD/m3.day could produce biogas at an average value of 66.3 L/day, with an average methane content of 69.9%, methane rate of 0.17 L CH4/g COD reduction or 19.06 L CH4/kg VS. Furthermore, methanation could reduce COD at an average value of 51.2 %, resulting in the effluent average value of COD filtrate and COD total of 210.1 mg/L and 375.2 mg /L, respectively.Keywords: acidification, methanation, CSTR, UASB, biogas ABSTRAKPercobaan digestasi anaerobik lumpur IPAL biologi industri kertas secara kontinyu skala pilot telah dilakukan di industri kertas dengan tujuan mengkaji efektivitas proses digestasi anaerobik dalam mengolah lumpur tersebut. Lumpur yang digunakan memiliki total solids sekitar 0,53% – 1,1%, pH netral (7,20 – 7,32) dengan komponen utama senyawa organik sekitar 97%. Percobaan dilakukan dalam dua tahap yaitu asidifikasi dalam reaktor CSTR berkapasitas 3 m3 pada pH 5,5 – 6,0 dan metanasi dalam reaktor UASB berkapasitas 5 m3 pada pH 6,5 – 7,0. Percobaan dilakukan dengan waktu retensi yang dipersingkat secara bertahap dari 6 hari ke 1 hari untuk proses asidifikasi dan dari 8 hari ke 2 hari untuk proses metanasi. Hasil percobaan menunjukkan bahwa pengoperasian reaktor CSTR dengan waktu retensi 1 hari dan beban organik 8,3 g VS/m3.hari dapat menghasilkan VFA rata-rata 17,3 g/kg VS.hari dengan kisaran 8,36 – 30,59 g/kg VS.hari, sedangkan pengoperasian reaktor UASB pada waktu retensi 2 hari dan beban organik 2,4 kg COD/m3.hari dapat menghasilkan biogas rata-rata 66,3 L/hari dengan kadar metana rata-rata 69,9% atau 0,17 L CH4/g COD reduksi atau 19,06 L CH4/kg VS. Selain itu proses metanasi dapat menurunkan COD terlarut rata-rata 51,2%, dengan konsentrasi efluen COD terlarut  rata-rata 210,1 mg/L dan COD total rata-rata 375,2 mg/L.Kata kunci: asidifikasi, metanasi, CSTR, UASB, biogas

A simple design and operation for the anaerobic treatment of highly concentrated swine waste in the tropics

1995 ◽  
Vol 32 (12) ◽  
pp. 91-97 ◽  
Author(s):  
P. Y. Yang ◽  
M. Kuroshima
Keyword(s):  
Treatment Process ◽  
Total Solid ◽  
Anaerobic Treatment ◽  
Solid Content ◽  
Total Solid Content ◽  
Treatment Processes ◽  
Tropical Conditions ◽  
Biological Reaction ◽  
The Tropics ◽  
Small Producers

In order to develop a simple operation for an anaerobic treatment process for highly concentrated pig wastewater for small producers, a three-stage anaerobic treatment process was investigated. The system provided a series of mixing, homogenization, biological reaction and final stabilization of concentrated pig waste (total solid content of 8–10%). The process provided a stable operational performance, simple operational procedure and well stabilized sludge effluent. It was also found that the system is economically feasible in Hawaii. Compared to the other treatment processes for highly concentrated pig waste, this process is considered as an appropriate alternative for the application of the small producers in land limited and tropical conditions. Also, the present treatment system can be easily developed into a prefabricated package plant which can minimize the on-site labor and building costs.

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