scholarly journals Enhancing Biogas Production and UASB Start-Up by Chitosan Addition

Biogas ◽  
10.5772/32361 ◽  
2012 ◽  
Author(s):  
Chantaraporn Phalakornkule ◽  
Maneerat Khemkhao
Keyword(s):  
Biogas Production ◽  
Start Up

Start-up and steady-state results of a full-scale UASB reactor treating malting wastewater

2006 ◽  
Vol 54 (2) ◽  
pp. 261-267 ◽  
Author(s):  
L. Borzacconi ◽  
I. López ◽  
M. Passeggi
Keyword(s):  
Loading Rate ◽  
Biogas Production ◽  
Cod Removal ◽  
Uasb Reactor ◽  
Organic Loading Rate ◽  
Yield Coefficient ◽  
Reactor Operation ◽  
Operation Temperature ◽  
Start Up ◽  
Anaerobic Lagoon

An Imhoff tank was reconstructed into a 250 m3 UASB reactor in order to treat a malting plant wastewater. The UASB was inoculated with sludge from an anaerobic lagoon used for slaughterhouse wastewater treatment. After two months of operation the reactor achieved full load with an HRT of 17 h, a COD removal higher than 80% and a biogas production of 300 m3/day (77% average methane content), with an organic loading rate of 3.6 kgCOD/m3.d (0.24 kgCOD/kgVSS.d). A yield coefficient of 0.09 gVSS/gCODrem was found from a mass balance. The fat present in the inoculated sludge (48 mg/gSSV) did not affect the start up performance. Sludge from the inoculum with high content of fat (270 mg/gSSV), was separated by flotation in the first week of operation. The COD removal efficiency was scarcely influenced by the reactor operation temperature (17–25 °C).

Mesophilic Anaerobic Digestion of Dairy Manure and Vegetable Waste Using Batch Reactor

2014 ◽  
Vol 1008-1009 ◽  
pp. 121-126
Author(s):  
Lin Jun Shi ◽  
Wen Lan Liu ◽  
Hui Fen Liu ◽  
Wei Yu Zhang ◽  
Li Tong Ban
Keyword(s):  
Anaerobic Digestion ◽  
Biogas Production ◽  
Batch Reactor ◽  
Theoretical Data ◽  
Gas Production ◽  
Dairy Manure ◽  
Experimental Results ◽  
Vegetable Waste ◽  
Start Up ◽  
Waste Mixture

Anaerobic digestion of single dairy manure, single vegetable waste, mixture of dairy manure and vegetable waste was conducted to produce biogas. Startup characteristic, leachate parameters and inoculation amount were investigated. The experimental results showed that anaerobic digestion can start up quickly with acclimated thickening sludge as inoculation sludge and 30% was appropriate inoculation percentage. Digestion of single dairy manure and mixture of dairy manure and vegetable waste appeared better buffering ability with higher alkalinity than single vegetable waste. Compared to single digestion of dairy manure or vegetable waste, mixture of dairy manure and vegetable waste is more suitable for anaerobic digestion. Under the conditions of TS=10% and T=(36±1)°C, cumulative biogas production of mixture of dairy manure and vegetable waste is 5281 mL during the period of 30 days and average daily gas production is about 176 mL. These results could provide theoretical data for practical biogas engineering.

scholarly journals Parameter Biokinetika dari Degradasi Limbah Kol dan Tomat Menggunakan Sistem Bioreaktor Anaerobik

2021 ◽  
Vol 10 (2) ◽  
pp. 82-89
Author(s):  
Maya Sarah ◽  
Erni Misran ◽  
Seri Maulina ◽  
Ika Pertiwi ◽  
Nahlionny Ritman ◽  
...  
Keyword(s):  
Alternative Energy ◽  
Fossil Fuels ◽  
Biogas Production ◽  
Anaerobic Bacteria ◽  
Maximum Growth ◽  
Feed Concentration ◽  
Free Oxygen ◽  
Alternative Energy Sources ◽  
Tomato Waste ◽  
Start Up

The world's energy supply is very dependent on non-renewable energy in the form of fossil fuels. This causes fossil fuels depletion and the need for alternative energy sources such as biogas. Biogas is produced from the fermentation process of organic matter with the help of anaerobic bacteria in free oxygen absence. This study aims to produce biogas from cabbage and tomato waste separately. Biogas production was carried out by varying feed concentrations of 100 g/L, 200 g/L, and 300 g/L for cabbage waste and 81.6 g/L; 215 g/L; and 237 g/L for tomato waste. This study consisted of 10 days seeding and acclimatization process, followed by a start-up stage using insulated anaerobic bioreactors. The largest methane from cabbage and tomato waste was 60% at a feed concentration of 200 g/L and 50% at a feed concentration of 237 g/L, respectively. The maximum growth rates (µm) for biogas from cabbage and tomato waste were 0.122 day-1 and 0.121 day-1, respectively.

Control of an anaerobic reactor towards maximum biogas production

2004 ◽  
Vol 50 (11) ◽  
pp. 189-198 ◽  
Author(s):  
J. Liu ◽  
G. Olsson ◽  
B. Mattiasson
Keyword(s):  
Control System ◽  
Biogas Production ◽  
Load Condition ◽  
Good Control ◽  
High Load ◽  
Extremum Seeking ◽  
Organic Load ◽  
Supervisory System ◽  
Start Up ◽  
High Load Condition

A new control strategy is introduced for operating anaerobic digestion processes efficiently at high load. The control system includes a cascade controller embedded into a rule-based supervisory system based on extremum-seeking control. The control system measures pH and biogas production rate and varies the organic load by manipulating the influent flow. Good control performances were achieved during the start-up and steady-state running operations and during rejection of disturbances. The control system can run the process under a high load condition and efficiently reject disturbances without explicit measurement of the influent characteristics.

Start-up of a pilot scale anaerobic reactor for the biogas production from the pineapple processing industries of Belgium

2019 ◽  
Vol 134 ◽  
pp. 241-246 ◽  
Author(s):  
Tesfayesus Zinare Mamo ◽  
Abhishek Dutta ◽  
S. Anuradha Jabasingh
Keyword(s):  
Biogas Production ◽  
Pilot Scale ◽  
Anaerobic Reactor ◽  
Start Up

Start-Up Operation and Hydraulic Retention Time Selectivity for Palm Oil Mill Wastewater at Mesophilic Temperature in Anaerobic Suspended Growth Closed Bioreactor

2014 ◽  
Vol 955-959 ◽  
pp. 1330-1334
Author(s):  
Yee Shian Wong ◽  
Tjoon Tow Teng ◽  
Soon An Ong ◽  
Morad Norhashimah ◽  
Mohd Rafatullah
Keyword(s):  
Palm Oil ◽  
Retention Time ◽  
Anaerobic Degradation ◽  
Hydraulic Retention Time ◽  
Biogas Production ◽  
Oxygen Demand ◽  
Anaerobic Bioreactor ◽  
Start Up ◽  
Palm Oil Mill ◽  
Pome Wastewater

The start-up operation and hydraulic retention time (HRT) selectivity of anaerobic degradation for palm oil mill effluent (POME) wastewater was carried out in an anaerobic bioreactor. HRT between 35 and 5 days were investigated. The start-up process for the anaerobic degradation of POME wastewater was found to be completed after 40 days of operation. This study also recommended that the anaerobic degradation of POME wastewater should be operated at the HRT between 35 and 10 days without acid risk. The performance of anaerobic bioreactor could reach 90.55% - 87.55% chemical oxygen demand (COD) reduction, 0.06 - 0.40 ratio between volatile fatty acid (VFA) and alkalinity (Alk), -368.2 mV to-445.80 mV of oxygen reduction potential (ORP) and 9.08 - 37.2 liters of biogas production, respectively.

scholarly journals Microbial and Phenyl Acid Dynamics during the Start-up Phase of Anaerobic Straw Degradation in Meso- and Thermophilic Batch Reactors

2019 ◽  
Vol 7 (12) ◽  
pp. 657 ◽  
Author(s):  
Eva Maria Prem ◽  
Rudolf Markt ◽  
Nina Lackner ◽  
Paul Illmer ◽  
Andreas Otto Wagner
Keyword(s):  
Anaerobic Degradation ◽  
Volatile Fatty Acids ◽  
Biogas Production ◽  
Lignocellulose Degradation ◽  
Batch Reactors ◽  
Highly Active ◽  
Start Up ◽  
Negative Effect ◽  
Complex Organic ◽  
Generation Sequencing

Aromatic compounds like phenyl acids derived from lignocellulose degradation have been suspected to negatively influence biogas production processes. However, results on this topic are still inconclusive. To study phenyl acid formation in batch reactors during the start-up phase of anaerobic degradation, different amounts of straw from grain were mixed with mesophilic and thermophilic sludge, respectively. Molecular biological parameters were assessed using next-generation sequencing and qPCR analyses. Metagenomic predictions were done via the program, piphillin. Methane production, concentrations of phenylacetate, phenylpropionate, phenylbutyrate, and volatile fatty acids were monitored chromatographically. Methanosarcina spp. was the dominant methanogen when high straw loads were effectively degraded, and thus confirmed its robustness towards overload conditions. Several microorganisms correlated negatively with phenyl acids; however, a negative effect, specifically on methanogens, could not be proven. A cascade-like increase/decrease from phenylacetate to phenylpropionate, and then to phenylbutyrate could be observed when methanogenesis was highly active. Due to these results, phenylacetate was shown to be an early sign for overload conditions, whereas an increase in phenylbutyrate possibly indicated a switch from degradation of easily available to more complex substrates. These dynamics during the start-up phase might be relevant for biogas plant operators using complex organic wastes for energy exploitation.

Study on Biogas Production by Dry Anaerobic Co-Digestion of Animal Manure and Straw

2011 ◽  
Vol 236-238 ◽  
pp. 98-103
Author(s):  
Li Jun Shi ◽  
Li Tong Ban ◽  
Hui Fen Liu ◽  
Jian Chao Hao ◽  
Wei Yu Zhang
Keyword(s):  
Biogas Production ◽  
Animal Manure ◽  
Chicken Manure ◽  
Pig Manure ◽  
Cow Manure ◽  
Apparent Effect ◽  
Biogas Yield ◽  
Operation Temperature ◽  
Start Up ◽  
Dry Digestion

Dry anaerobic co-digestion of animal manure and straw was conducted to produce biogas. Startup characteristics and biogas production perform of dry digestion were studied, and the effect of operation temperature and incubation amount on dry digestion was also investigated. The study result showed that under the conditions of C/N=25-30, TS=20% and T=(36±1) °C,dry digestion can start up quickly with acclimated thickening sludge as incubation sludge. Compared to dry digestion of chicken manure and pig manure, dry digestion of cow manure proceeded steadily with high biogas yield. It is found that incubation is necessary in the process of dry digestion and biogas yield increases with more incubation amount. The appreciate incubation ratio is about 10%. Temperature change has apparent effect on biogas production, and it is suggested that mesophilic temperature should be chosen in the scaled project of dry digestion.

Performance of a Refitted Anaerobic Reactor System in Treatment of Water Hyacinth Press Juice

2010 ◽  
Vol 113-116 ◽  
pp. 504-507
Author(s):  
Da Yong Xu
Keyword(s):  
Experimental Investigation ◽  
Water Hyacinth ◽  
Biogas Production ◽  
Reactor System ◽  
Anaerobic Reactor ◽  
Digestion Process ◽  
Whole Process ◽  
Wet Gas ◽  
Start Up ◽  
Initial Content

The main objective of the present experimental investigation was to evaluate the performance of using a refitted anaerobic reactor system to treat the water hyacinth press juice. The biogas production rate was rapidly rising from 25 L.d-1 to 54 L.d-1 in the first few start-up days, there was approximately 1332 L biogas measured by wet gas meter and 62% of methane was detected during the experiment period. At the end of the anaerobic digestion treatment, it could be observed about 83.5% COD, 85.7% SS and 74.1% SS of the initial content was removed, declined from 7428 mg.L-1 to 1223 mg.L-1, from 6748 mg.L-1 to 967mg.L-1 and from 2315 mg.L-1 to 600mg.L-1, respectively. TN declined from 127.8mg.L-1 to 88.0mg.L-1 with a total loss of 31.2%. The variation of TP in the whole process was gradually declined, from 34.3mg.L-1 to 25.0mg.L-1, had total 27.1% lost. In the whole digestion process the pH increased slowly from 6.8 to 7.8. On the basis of the experimental results obtained, it is possible to conclude that: the refitted anaerobic reactor system for water hyacinth press juice digestion was practical and effective.

scholarly journals Start-up of Hybrid Upflow Anaerobic Sludge Blanket Reactor with Organic Wastewater

2019 ◽  
Vol 8 (3) ◽  
pp. 1826-1829
Keyword(s):  
Hydraulic Retention Time ◽  
Ph Value ◽  
Biogas Production ◽  
Upflow Anaerobic Sludge Blanket ◽  
Anaerobic Sludge ◽  
Start Up ◽  
Anaerobic Sludge Blanket ◽  
Maximum Removal ◽  
Organic Wastewater

In the process of treating wastewaters from different industries by using anaerobic reactor, initially the start-up process is the first step to stabilize the reactor. The aim of this research is to conduct the start-up process and to evaluate the characterization of synthetic organic wastewater using Hybrid up flow Anaerobic Sludge Blanket reactor (HUASBR) with the effective volume of 20L. Initially the reactor was processed with synthetic organic wastewater with COD of 3200 mg/l. The processes were continuously operated with hydraulic retention time of 24 hours for 48 days. The results obtained after the process of stabilization were, COD removal is 87.8%, VFA was Stable for the operating condition, Biogas production was increased as 13.2 l/d during the maximum removal of COD and the pH value of outlet is ranging from 5.5-7.9.

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