Comparative Assessment of Sludge Pre-Treatment Techniques to Enhance Sludge Dewaterability and Biogas Production

2017 ◽  
Vol 46 (1) ◽  
pp. 1700569 ◽  
Author(s):  
Didem Okutman Tas ◽  
Cigdem Yangin-Gomec ◽  
Tugba Olmez-Hanci ◽  
Osman A. Arikan ◽  
Deniz I. Cifci ◽  
...  
Keyword(s):  
Biogas Production ◽  
Comparative Assessment ◽  
Treatment Techniques ◽  
Sludge Dewaterability ◽  
Pre Treatment

Swine manure biogas production improvement using pre-treatment strategies: lab-scale studies and full-scale application

2021 ◽  
pp. 100716
Author(s):  
Deisi Cristina Tápparo ◽  
Daniela Cândido ◽  
Ricardo Luis Radis Steinmetz ◽  
Christian Etzkorn ◽  
André Cestonaro do Amaral ◽  
...  
Keyword(s):  
Biogas Production ◽  
Swine Manure ◽  
Treatment Strategies ◽  
Full Scale ◽  
Production Improvement ◽  
Pre Treatment

Hydrothermal, acidic, and alkaline pretreatment of waste flower-mix for enhanced biogas production: a comparative assessment

2021 ◽  
Author(s):  
Avantika Agarwal ◽  
Kunwar Paritosh ◽  
Pragati Dangayach ◽  
Priyanka Gehlot ◽  
Nidhi Pareek ◽  
...  
Keyword(s):  
Biogas Production ◽  
Comparative Assessment ◽  
Alkaline Pretreatment

Alkali pre-treatment of Sorghum Moench for biogas production

2013 ◽  
Vol 67 (9) ◽  
Author(s):  
Karina Michalska ◽  
Stanisław Ledakowicz
Keyword(s):  
Anaerobic Digestion ◽  
Chemical Oxygen Demand ◽  
Volatile Fatty Acids ◽  
Biogas Production ◽  
Oxygen Demand ◽  
Total Phenolic ◽  
Methane Generation ◽  
Pre Treatment ◽  
Alkali Hydrolysis ◽  
Almost All

AbstractThis work studies the influence of the alkali pre-treatment of Sorghum Moench — a representative of energy crops used in biogas production. Solutions containing various concentrations of sodium hydroxide were used to achieve the highest degradation of lignocellulosic structures. The results obtained after chemical pre-treatment indicate that the use of NaOH leads to the removal of almost all lignin (over 99 % in the case of 5 mass % NaOH) from the biomass, which is a prerequisite for efficient anaerobic digestion. Several parameters, such as chemical oxygen demand, total organic carbon, total phenolic content, volatile fatty acids, and general nitrogen were determined in the hydrolysates thus obtained in order to define the most favourable conditions. The best results were obtained for the Sorghum treated with 5 mass % NaOH at 121°C for 30 min The hydrolysate thus achieved consisted of high total phenolic compounds concentration (ca. 4.7 g L−1) and chemical oxygen demand value (ca. 45 g L−1). Although single alkali hydrolysis causes total degradation of glucose, a combined chemical and enzymatic pre-treatment of Sorghum leads to the release of large amounts of this monosaccharide into the supernatant. This indicates that alkali pre-treatment does not lead to complete cellulose destruction. The high degradation of lignin structure in the first step of the pre-treatment rendered the remainder of the biomass available for enzymatic action. A comparison of the efficiency of biogas production from untreated Sorghum and Sorghum treated with the use of NaOH and enzymes shows that chemical hydrolysis improves the anaerobic digestion effectiveness and the combined pre-treatment could have great potential for methane generation.

Sample pre-treatment techniques for use with ICP-MS hyphenated techniques for elemental speciation in biological samples

2017 ◽  
Vol 32 (1) ◽  
pp. 58-77 ◽  
Author(s):  
Han Wang ◽  
Xiaolan Liu ◽  
Kai Nan ◽  
Beibei Chen ◽  
Man He ◽  
...  
Keyword(s):  
Biological Samples ◽  
State Of The Art ◽  
Sample Pretreatment ◽  
The State ◽  
Elemental Speciation ◽  
Hyphenated Techniques ◽  
Treatment Techniques ◽  
Icp Ms ◽  
Pre Treatment

This review will focus specifically on the state of the art of novel sample pretreatment methods which have been combined with ICP-MS based hyphenated techniques for elemental speciation in biological samples.

Impacts of N, N'-diphenyl-1, 4-phenylenediamine (DPPD) Antioxidant Additive in Jatropha Biodiesel Blends to Reduce NOx Emission of a Multi Cylinder Vehicle Type Diesel Engine

2013 ◽  
Vol 774-776 ◽  
pp. 784-790
Author(s):  
S.M. Palash ◽  
M.A. Kalam ◽  
H.H. Masjuki ◽  
B.M. Masum
Keyword(s):  
Diesel Engine ◽  
Engine Performance ◽  
Exhaust Emission ◽  
Antioxidant Additive ◽  
Biodiesel Blends ◽  
Market Expansion ◽  
Treatment Techniques ◽  
Pre Treatment ◽  
Biodiesel Fuels ◽  
Full Throttle

To meet stringent exhaust emission norms worldwide, various exhaust pre-treatment and post-treatment techniques have been employed in modern engines. Using antioxidant additives in biodiesel fuels is a promising and effective NOx reduction technology. Non-edible jatropha oil based methyl ester was produced and blended with conventional diesel. Five fuel samples (Diesel, JB5, JB5DPPD0.15%, JB15 and JB15DPPD0.15%) were tested for their use as substitute fuel for a radiator-cooled four cylinder diesel engine. Experiment results show that DPPD antioxidant additive could be reduced NOx emission significantly with slight penalty on engine performance as well as CO and HC emission. However, when compared to diesel combustion the emissions of HC and CO were found nearly same or below. By addition of 0.15% (m) DPPD additive in JB5 and JB15 reduction of NOx emission were 12.68% and 13.36 % compared to biodiesel blends without additive at full throttle position. As conclusion, JB5 and JB15 with addition of 0.15% (m) can be used in four cylinder diesel engine to reduce NOx and consequently overcome the barrier to market expansion of biodiesel fuels.

Storage and pre-treatment of substrates for biogas production

2013 ◽  
pp. 85-103 ◽  
Author(s):  
Günther Bochmann ◽  
Lucy F.R. Montgomery
Keyword(s):  
Biogas Production ◽  
Pre Treatment

scholarly journals Opportunity of Biogas Production from Solid Organic Wastes through Anaerobic Digestion

2018 ◽  
Vol 65 ◽  
pp. 05025 ◽  
Author(s):  
Sagor Kumar Pramanik ◽  
Fatihah Binti Suja ◽  
Biplob Kumar Pramanik ◽  
Shahrom Bindi Md Zain
Keyword(s):  
Anaerobic Digestion ◽  
Biogas Production ◽  
Nutrient Balance ◽  
Organic Wastes ◽  
Organic Loading Rate ◽  
Biogas Yield ◽  
Carbon And Nitrogen ◽  
Potential Risks ◽  
Nitrogen Ratio ◽  
Pre Treatment

Solid organic wastes create potential risks to environmental pollution and human health due to the uncontrolled discharge of huge quantities of hazardous wastes from numerous sources. Now-a-days, anaerobic digestion (AD) is considered as a verified and effective alternative compared to other techniques for treating solid organic waste. The paper reviewed the biological process and parameters involved in the AD along with the factors could enhance the AD process. Hydrolysis is considered as a rate-limiting phase in the complex AD process. The performance and stability of AD process is highly influenced by various operating parameters like temperature, pH, carbon and nitrogen ratio, retention time, and organic loading rate. Different pre-treatment (e.g. mechanical, chemical and biological) could enhance the AD process and the biogas yield. Co-digestion can also be used to provide suitable nutrient balance inside the digester. Challenges of the anaerobic digestion for biogas production are also discussed.

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