scholarly journals The effect of various pre‐treatment methods of chromium leather shavings in continuous biogas production

2019 ◽  
Vol 20 (3-4) ◽  
pp. 79-89 ◽  
Author(s):  
Carolina Scaraffuni Gomes ◽  
Jens‐Uwe Repke ◽  
Michael Meyer
Keyword(s):  
Biogas Production ◽  
Treatment Methods ◽  
Pre Treatment

scholarly journals PENGARUH WAKTU FERMENTASI TERHADAP VOLUME GAS BIO DAN PENYISIHAN COD DENGAN METODE PERLAKUANAWAL MENGGUNAKAN KALIUMHIDROKSIDA(KOH) PADA ECENG GONDOK (Eichhornia crassipes)

2016 ◽  
Vol 5 (2) ◽  
pp. 49-54
Author(s):  
Setiaty Pandia ◽  
Amin Trisnawati
Keyword(s):  
Water Hyacinth ◽  
Eichhornia Crassipes ◽  
Fermentation Process ◽  
Biogas Production ◽  
Anaerobic Digester ◽  
Cod Removal ◽  
Cow Dung ◽  
Treatment Methods ◽  
Batch System ◽  
Pre Treatment

The purpose of this study was to determine the effect of alkali pre-treatment methods on the quality and quantity of biogas. The study was doneby fermentation process the water hyacinth with KOH in a concentration of 6,7 M; 4 M;3 M; and 2,95 (M) with water in ratio hyacinth: water 70:30; 50:50; 30:70 and 100:0 (v/v) mixed with cow dung starter in an anaerobic digester batch system of 2,5 L capacity.  In this study the highest biogas production at KOH concentration  4 M was in ratio of 50:50 (v/v)with yield biogas volume  449 mL and 86,52% of COD revomal, 92,42% of TSS removal. The lowest biogas production at KOH concentration 6,7 M was in ratio of 70:30 (v/v) with yield biogas volume 132 mL and 86,55% of COD removal and 88,65%of TSS removal.

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

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.

Minimizing of foaming in digesters by pre-treatment of the surplus-sludge

2000 ◽  
Vol 42 (9) ◽  
pp. 235-241 ◽  
Author(s):  
M. Barjenbruch ◽  
H. Hoffmann ◽  
O. Kopplow ◽  
J. Tränckner
Keyword(s):  
High Pressure ◽  
Activated Sludge ◽  
Treatment Methods ◽  
Foaming Agents ◽  
Instance Reduction ◽  
Filamentous Microorganisms ◽  
Hydrophobic Substances ◽  
Pre Treatment ◽  
Heating Up ◽  
The Impact

Several reasons can lead to the emergence of foam in digesting tanks, for instance overloading or the impact of hydrophobic substances. Furthermore, the foaming is in regular periods going together with the emergence of filamentous microorganisms. Up to now, several strategies to avoid foaming have been tested out (for instance reduction of the sludge load in the activated sludge stage, lowering of the sludge level in the digestion tank, dosage of anti foaming agents), but these have been done relatively unsystematically and with more or less success. For our contribution, laboratory-scale digestion tests were run to analyse mechanical and thermal pre-treatment methods for the destruction of the surplus sludge. Whereas the disintegration by a high pressure homogeniser did only achieve a low reduction of the foam phase, the thermal pre-treatment at 121°C made for an effective subduing of the foam emergence. Both methods allowed for a cutting up of the filaments, but only the heating up effected the reduction of the hydrophobic substances; thus, the foaming is possibly caused by them.

Advances in Eco-Friendly Pre-Treatment Methods and Utilization of Agro-Based Lignocelluloses

2017 ◽  
pp. 371-419 ◽  
Author(s):  
Mohd Azmuddin Abdullah ◽  
Muhammad Shahid Nazir ◽  
Huma Ajab ◽  
Safoura Daneshfozoun ◽  
Sakinatu Almustapha
Keyword(s):  
Treatment Methods ◽  
Pre Treatment

scholarly journals Investigation of Three Pre-treatment Methods Prior to Nanofiltration Membrane for Palm Oil Mill Effluent Treatment

2015 ◽  
Vol 44 (3) ◽  
pp. 421-427 ◽  
Author(s):  
Muhammad Said ◽  
Abdul Wahab Mohammad ◽  
Mohd Tusirin Mohd Nor ◽  
Siti Rozimah Sheikh Abdullah ◽  
Hassimi Abu Hasan
Keyword(s):  
Palm Oil ◽  
Effluent Treatment ◽  
Palm Oil Mill Effluent ◽  
Nanofiltration Membrane ◽  
Treatment Methods ◽  
Palm Oil Mill ◽  
Pre Treatment

scholarly journals Effect of pre treatment methods on fruits drying of grapes under warm air condition

2018 ◽  
Vol 33 (01) ◽  
Author(s):  
Priti Jain ◽  
S. P. Shrivastava ◽  
Sheela Pandey
Keyword(s):  
Olive Oil ◽  
Soy Lecithin ◽  
Drying Time ◽  
Treatment Methods ◽  
Pre Treatment ◽  
Drying Rates

In the present study, grapes pretreated with different concentrations of potassium carbonates plus olive oil and soy lecithin with different dipping times. A dryer was built to perform the experiment under controlled condition of drying air at temperature 50°C and velocity 1.0 m/s. Grapes dipped into 1percentage olive oil plus 6percentage K2CO3 emulsion, at 50°C for 2 min. prior to drying showed shorter drying times and comparatively good quality raisin, whereas grapes dipped into 1.5percentage soy lecithin, at same conditions resulted in a total drying time slightly higher than the most effective pre treatment. The drying rates of grapes were modeled by the page equations. Grapes that are naturally dried usually darken in colour, whereas dipped grapes stay yellow-green.

scholarly journals Hydrolytic pre-treatment methods for enhanced biobutanol production from agro-industrial wastes

2018 ◽  
Vol 249 ◽  
pp. 673-683 ◽  
Author(s):  
Sampa Maiti ◽  
Gorka Gallastegui ◽  
Gayatri Suresh ◽  
Saurabh Jyoti Sarma ◽  
Satinder Kaur Brar ◽  
...  
Keyword(s):  
Industrial Wastes ◽  
Treatment Methods ◽  
Pre Treatment
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