Sompong O-Thong

Sompong O-Thong
None

Ph.D.

About

138
Publications
33,113
Reads
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3,907
Citations
Additional affiliations
January 2009 - December 2011
Technical University of Denmark
January 2008 - present
Thaksin University
Description
  • Microbial Resource Management Research Unit, Faculty of Science, Thaksin University, Phatthalung 93110, Thailand
January 2007 - July 2016
Thaksin University
Position
  • Asst.Prof.

Publications

Publications (138)
Article
Full-text available
A thermophilic H2-producing bacterial strain was isolated from a biohydrogen reactor fed with palm oil mill effluent (POME) and identified as Thermoanaerobacterium thermosaccharolyticum using 16S rRNA gene analysis. The isolated bacterium, designated as T. thermosaccharolyticum PSU-2, showed a high yield and production rate of H2. Temperature optim...
Article
Five methods for preparation of hydrogen-producing seeds (base, acid, 2-bromoethanesulfonic acid (BESA), load-shock and heat shock treatments) as well as an untreated anaerobic digested sludge were compared for their hydrogen production performance and responsible microbial community structures under thermophilic condition (60 degrees C). The resul...
Article
Full-text available
Thermoanaerobacterium-rich sludge acclimated with palm oil mill effluent (POME) in an anaerobic sequencing batch reactor operating at was used as a seed in batch experiments to investigate the effects of C/N (carbon/nitrogen) ratio, C/P (carbon/phosphate) ratio and iron concentration in POME on fermentative hydrogen production. A central composite...
Article
Full-text available
Thermophilic microflora was seeded into an anaerobic sequencing batch reactor for hydrogen production from palm oil mill effluent and supplemented with nitrogen, phosphorus and iron sources for biostimulants. The nutrient supplementation increased the hydrogen production yield from 1.6 ± 0.1 to 2.24 ± 0.03 mol H2 mol−1 hexose and hydrogen productio...
Article
The optimum values of hydraulic retention time (HRT) and organic loading rate (OLR) of an anaerobic sequencing batch reactor (ASBR) for biohydrogen production from palm oil mill effluent (POME) under thermophilic conditions (60 °C) were investigated in order to achieve the maximum process stability. Microbial community structure dynamics in the ASB...
Article
High-strength waste activated sludge (WAS) and greasy sludge (GS) were largely generated from canned tuna processing. This study reports the performance of the two-stage anaerobic process for co-digesting WAS and GS. Various WAS:GS mixing ratios of 0:100, 10:90, 20:80, 30:70, 40:60, 50:50, 60:40, 70:30, 80:20, 90:10, and 100:00 (volatile solids (VS...
Article
Some species of the genus Clostridium are efficient acetate producers and have been deemed useful for upgrading industrial biogas. An acetogenic, strictly anaerobic, Gram-stain-positive, subterminal endospore-forming bacterium designated strain PL3 T was isolated from peatland soil enrichments with H 2 and CO 2 . Cells of strain PL3 T were 0.8–1.0×...
Article
Homoacetogens consortium was enriched from peatland soil, digested sludge, and rumen fluid for simultaneous carbon dioxide (CO2) consumption and acetic acid production in the biogas upgrading process. The homoacetogens consortium enriched from peatland soil (PL3) has a maximum CO2 consumption and acetic acid production of 95% and 120 mg/L, respecti...
Article
Full-text available
A sudden pH drops always inhibits the anaerobic digestion (AD) reactor for biogas production from palm oil mill effluent (POME). The pH adjustment of POME by oil palm ash addition and the biogas effluent recycling effect on the preventing of pH drop and change of the archaea community was investigated. The pH adjustment of POME to 7.5 increased the...
Article
Valorization of biodiesel-derived crude glycerol and its hydrolysis product (ethanol) as a co-substrate supplemented to palm oil mill effluent (POME) to enhance biogas production efficiency under mesophilic anaerobic digestion was investigated. Based on our previous studies, the concentrations of each co-substrate were varied in the range of 1–5% v...
Article
The high-solid anaerobic digestion (AD) for anaerobic co-digestion of palm oil mill effluent and oil palm empty fruit bunches (EFB) has low degradation efficiency. The enhancement of biogas production and EFB degradation efficiency by Bacteroides and Clostridium-rich methanogenic consortium was investigated. A Bacteroides and Clostridium-rich metha...
Article
Full-text available
This study attempted to find potential effective thermotolerant microorganisms producing complex enzymes for use in the hydrolyzing empty fruit bunch (EFB) to reduce cost of enzyme and enhance the efficiency of saccharification. The enrichment process at 45 °C was employed as a strategy to obtain four effective thermotolerant microorganisms. Strept...
Article
A novel reactor was developed in this research to simultaneously produce biogas from solid- and liquid-state anaerobic digestions in one container for the first time. Excess heat from the outer liquid-state anaerobic digestion (OL-AD) of POME was transferred to the inner solid-state anaerobic digestion (IS-AD) of EFB for promoting thermophilic dige...
Article
Full-text available
Background Full-scale biogas production from palm oil mill effluent (POME) was inhibited by low pH and highly volatile fatty acid (VFA) accumulation. Three strategies were investigated for recovering the anaerobic digestion (AD) imbalance on biogas production, namely the dilution method (tap water vs. biogas effluent), pH adjustment method (NaOH, N...
Article
Empty fruit bunches (EFB) have low biodegradability and restrict their commercial utilization in biogas plants. Integration of straw mushroom (Volvariella volvacea) cultivation as a function of bio-pretreatment on EFB to improve biodegradability and methane production by solid-state anaerobic digestion (SS-AD) was investigated. The mushroom yield w...
Chapter
Algal biomass, including both macroalgae and microalgae, could be potentially converted to biobutanol, an advanced liquid biofuel having potential to replace petroleum-based fuels. Biobutanol can be produced from biomass via Clostridium sp. acetone-butanol-ethanol (ABE) fermentation pathway, which is a complex two-phase heterofermentation of acidog...
Article
Full-text available
The objective of this study is to reduce the production of Hydrogen sulfide (H 2 S) in sewer pipe by using conductive concrete and electricity-producing bacteria (EPB). This work was mainly focused on evaluating the effect of inoculation of EPB isolated from sewage sludge from municipal wastewater treatment plant for decreasing production of H 2 S....
Article
Full-text available
The efficacy of concentrated enzymes from Trichoderma koningiopsis TM3 in hydrolyzing palm oil mill effluent (POME) and oil palm trunk residues (OPTr) at 40 and 50 °C was evaluated prior to methane fermentation. POME hydrolysate containing total sugar concentration of 15.40 g L⁻¹ was obtained from enzymatic hydrolysis using 15 Unit g⁻¹ TVS at 50 °C...
Article
This study aimed to investigate the biohydrogen and biomethane potential of palm oil mill effluent (POME) in a two-stage anaerobic digestion (AD) system under thermophilic (55 ± 3 °C) and mesophilic (30 ± 3 °C) conditions, respectively. Among the initial loadings of 0.5 g-COD, 1.0 g-COD, or 1.5 g-COD, the best production potentials of 106.13 mL-H2/...
Article
Full-text available
Background Anaerobic digestion (AD) is a suitable process for treating high moisture MSW with biogas and biofertilizer production. However, the low stability of AD performance and low methane production results from high moisture MSW due to the fast acidify of carbohydrate fermentation. The effects of organic loading and incineration fly ash additi...
Chapter
Recovery of bioenergy and biochemicals from industrial and agricultural wastewater has attracted growing and widespread interests. The two-stage fermentation process offers an appealing avenue to achieve stepwise and directional substrate conversion in separated stages. The two-stage fermentation process could enhance the degradation of the substra...
Chapter
Medium-chain fatty acids (MCFAs) and their derivatives have important applications in the energy and chemical industries. The sustainable production of MCFAs from renewable biomass resources using microbial fermentation has become promising. A particular set of anaerobic pathways known as chain elongation can occur under specific conditions produci...
Article
Hydrothermal carbonization aqueous phase (HTC-AP) can be used for methane production by anaerobic digestion (AD). However, it generally had low conversion efficiency due to the formation of complex dissolved organic matters, which depends upon the components of biomass. The present study investigated the characteristics, methane potentials, and rec...
Article
Full-text available
Background: The co-fermentation of syngas (mainly CO, H2 and CO2) and different concentrations of carbohydrate/protein synthetic wastewater to produce volatile fatty acids (VFAs) was conducted in the present study. Results: It was found that co-fermentation of syngas with carbohydrate-rich synthetic wastewater could enhance the conversion effici...
Article
CO is a main component of syngas produced by the thermal gasification of biomass. The biological conversion of sole CO into medium-chain carboxylates (MCCs) has attracted considerable attention, although the process has a low efficiency. The present study demonstrated a process to achieve efficient MCCs production from short-chain carboxylates (SCC...
Article
The highly heterogeneous structure of oil palm empty fruit bunches (EFB) restrict the exploitation of its potential in biogas plants. Fungal pretreatment of EFB with Trichoderma reesei TISTR 3080 and Pleurotus ostreatus DSM 11191 to improve EFB biodegradability and methane production via solid-state anaerobic digestion (SS-AD) was investigated. The...
Article
Full-text available
Oil palm empty fruit bunches (EFB) and palm oil decanter cake (DC) were used to investigate biogas production by using solid-state anaerobic co-digestion (SS-AcoD) with 15% total solid (TS) content. Solid state anaerobic digestion (SS-AD) using substrate to inoculum (S:I) ratio of 3:1, methane yields of 353.0 mL-CH4/g-VS and 101.5 mL-CH4/g-VS were...
Article
The effect of oil and its derivative (long-chain fatty acids (LCFAs), and glycerol) in palm oil mill effluent (POME) on methane production and the microbial community were investigated. POME with oil concentration >1.6 g⋅L⁻¹ could cause the imbalance of the anaerobic digestion (AD) process by decreasing methane yield, accumulation of volatile fatty...
Article
Full-text available
Biohydrogen production from palm oil mill effluent by two-stage dark fermentation and microbial electrolysis was investigated under thermophilic condition. The optimum chemical oxygen demand (COD) concentration and pH for dark fermentation were 66 g·L⁻¹ and 6.5 with a hydrogen yield of 73 mL-H2·gCOD⁻¹. The dark fermentation effluent consisted of ma...
Article
The sulfate-reducing bacteria (SRB) consortium (Desulfovibrio sp. Desulfitibacter sp. Dethiosulfatibacter sp. and Clostridium sp.) was investigated for sulfate removal and biohythane production from rubber sheet wastewater (RSW). The RSW at COD/SO42− ratio of 13 and pH 6 was suitable for sulfate reduction and biohythane production. Hydrogen yield,...
Article
Full-text available
Hydrothermal liquefaction of sewage sludge to produce bio-oil and hydro-char unavoidably results in the production of high-strength organic wastewater (HTLWW). However, anaerobic digestion (AD) of HTLWW generally has low conversion efficiency due to the presence of complex and refractory organics. The present study showed that granular activated ca...
Article
The critical challenge of hydrothermal liquefaction (HTL) for bio-oil production from biomass is the production of large amounts of aqueous products (HTL-AP) with high organic contents. The present study investigated the anaerobic digestion (AD) performances of HTL-AP under both thermophilic and mesophilic conditions, and molecular and metabolic an...
Article
Biogas production of palm oil mill effluent (POME) and empty fruit bunches (EFB) was performed by coupled liquid (L-AD) and solid-state (SS-AD) anaerobic digestion processes. POME was fed to L-AD digester, while mixed of effluent from L-AD and EFB was fed to SS-AD digester. The maximum overall methane production of 60.9 m3-CH4·ton-1 waste was obtai...
Article
Thermotolerant cellulolytic consortium for improvement biogas production from oil palm empty fruit bunches (EFB) by prehydrolysis and bioaugmentation strategies was investigated via solid-state anaerobic digestion (SS-AD). The prehydrolysis EFB with Clostridiaceae and Lachnospiraceae rich consortium have maximum methane yield of 252 and 349 ml CH4...
Article
Full-text available
In this study, the performance of immobilized cells on granular activated carbon (GAC) for thermophilic biohydrogen production is determined using POME as a fermentation substrate. The immobilized cells are formed at different pH medium using sugar composition characterized in the POME. The pH 6 revealed the optimum pH used for biofilm development...
Article
Improvement of biohythane production from oil palm industry solid waste residues by co-digestion with palm oil mill effluent (POME)in two-stage thermophilic fermentation was investigated. A two-stage co-digestion of solid waste with POME has biohythane production of 26.5–34 m ³ /ton waste. The co-digestion of solid waste with POME increased biohyth...
Article
Methane production from solid-state anaerobic digestion (SS-AD) of empty fruit bunches (EFB) using recycling solid-anaerobic digested (S-AD) sludge and liquid-anaerobic digested (L-AD) sludge as inoculum was investigated under thermophilic (55 °C) and mesophilic conditions (40 °C). The methane production rate of LAD sludge (2.98-3.27 L-CH 4 L −1 re...
Article
Full-text available
A mathematical model of minimum fluidization velocity (U mf ) was developed based on the hydrodynamic characteristics of the fluidized bed reactors (FBR) with immobilised cells attached to activated carbon at thermophilic biohydrogen fermentation. The maximum hydrogen productivity rate of 7.8 mmolH 2 /L.h and hydrogen yield of 2.2 molH 2 /mol of su...
Article
The suitability of molasses, Napier grass (Pennisetum purpureum), empty fruit bunches (EFB), palm oil mill effluent (POME), and glycerol waste as a co-substrate with Chlorella sp. TISTR 8411 biomass for biohythane production was investigated. Mono-digestion of Chlorella biomass had hydrogen and methane yield of 23–35 and 164–177 mL gVS ⁻¹ , respect...
Article
Full-text available
Cellulose is a polysaccharide or a carbohydrate polymer which is found in many tropical plants. Cellulose is not only a main structural material of plants, but it is also able to be produced by bacteria. Bacterial cellulose is a biomaterial which is produced from bacteria with high purity (free of lignin and hemicellulose), high crystallinity, high...
Article
Oil palm frond (OPF) is one of the major oil palm biomass from agricultural waste. It can be potential to be valorised into cellulose. Cellulose can be extracted from natural fibers, which environmentally sustainable products. The aim of this work is to extract cellulose from oil palm frond biomass by two different treatments: (i) extraction cellul...
Article
Lipids are one of the major organic pollutants in palm oil mill effluent (POME). The anaerobic digestion (AD) process is often inhibited by lipids and long chain fatty acids (LCFAs). This study aimed to elucidate effects of lipids and long chain fatty acids (LCFAs) in POME on methane production and changing of microbial communities. The initial org...
Article
Continuous H2 production from xylose by granules and biofilm up-flow anaerobic reactor using moderate thermophilic mixed cultures was investigated. The maximum H2 yield of 251 mL H2/g-xylose with H2production rate of 15.1 L H2/L⋅d was obtained from granules reactor operating at the organic loading rate (OLR) of 60 g-xylose/L⋅d and hydraulic retenti...
Article
The effect of trace metals supplementation into palm oil mill effluent on biohythane production and responsible microbial communities in thermophilic two-stage anaerobic fermentation was investigated. High biohythane yields were linked to Ni/Co/Fe supplementation (10, 6 and 20 mg L⁻¹, respectively) with maximum H2 and CH4 yields of 139 mL H2 gVS⁻¹...
Article
The pilot-scale of two-stage thermophilic (55 °C) for biohythane production from palm oil mill effluent (POME) was operated at hydraulic retention time (HRT) of 2 days and organic loading rate (OLR) of 27.5 gCOD/L⋅d) for first stage and HRT of 10 days and OLR of 5.5 gCOD/L⋅d for second stage. Biohythane production rate was 1.93 L-gas/L⋅d with bioga...
Article
The cultivation of Chlorella sp. TISTR 8411 on biogas effluent of seafood processing wastewater was investigated. Chlorella sp. biomass was used for biogas production by anaerobic co-digestion with seafood processing. Chlorella sp. biomass cultivated on 50, 60, 70, 80, 90, and 100% of biogas effluent was 0.184, 0.121, 0.061, 0.048, 0.039, and 0.032...
Article
Full-text available
Hydrogen sulfide (H2S) is one of the most problematic contaminants in biogas. The removal of H2S from biogas is necessary in order to clean biogas and prevent gas engine. The efficiency evaluation on H2S removal from palm oil mill biogas by biofilter was investigated. Eight sludge samples from biofilter systems of palm oil mill biogas were tested f...
Article
Full-text available
The sulfate-rich wastewater from rubber smoked sheet industry could generate hydrogen sulfide (H2S) under anaerobic condition, which created bad smell to the community and might cause toxicity and damage to the environment. The H2S can be removed from the biogas by sulfur-oxidizing bacteria (SOB) with the ability to converted H2S to sulfate. Sulfat...
Article
Full-text available
Palm oil mill industry generates a large amount of palm oil mill effluent (POME) and empty fruit bunches (EFB) as byproducts. Biogas production from anaerobic co-digestion of POME with EFB was investigated under mesophilic condition. The amount of POME and EFB was varied from 2 to 10 gVS and size of EFB was varied from 0.5-6 centimeter. High methan...
Article
Empty fruit bunches (EFB), palm oil mill effluent (POME), sewage chemical sludge and sewage biological sludge were evaluated for methane production under liquid-state anaerobic digestion (L-AD) and solid-state anaerobic digestion (SS-AD). The highest methane yield of 456 mL CH4 g⁻¹VS was achieved from co-digestion POME with sewage chemical sludge a...
Article
Full-text available
The effect of glycerol waste (GW) concentration was studied in anaerobic co-digestion with canned sardine wastewater (CSW), has been examined using the 1-stage mesophilic (P1), 1-stage thermophilic (P2) and 2-stage mesophilic (P3) process. P3 process was the best process, could improve the biogas production (bio-hythane) in the case of canned sardi...
Article
Full-text available
Oil palm trunk (OPT) an abundant agriculture waste was evaluated as an alternative lignocellulosic biomass resource for bioethanol production. Sulfite-based SPORL pretreatment (Sulfite Pretreatment to Overcome Recalcitrance of Lignocellulose) was applied to the OPT to enhance its enzymatic saccharification. The pretreatment conditions were optimize...
Article
Two-stage thermophilic solid state anaerobic digestion (SS-AD) processes for biohythane production from Chlorella sp. biomass was investigated. The hydrogen and methane yield from fresh Chlorella sp. biomass was 124.9 mL H2 gVS⁻¹ and 230.1 mL CH4 gVS⁻¹, respectively, at 16% TS with biodegradation efficiency of 34%. Hydrogen and methane production f...
Article
Full-text available
Background: Biohydrogen effluent contains a high concentration of volatile fatty acid (VFA) mainly as butyric, acetic, lactic and propionic acids. The presence of various VFAs (mixture VFAs) and their cooperative effects on two-stage biohythane production need to be further studied. The effect of VFA concentrations in biohydrogen effluent of palm o...
Article
Full-text available
Hydrogen production from cassava starch processing wastewater by two-stage thermophilic dark fermentation and microbial electrolysis was investigated. Single-chamber membrane-free microbial electrolysis cell with applied voltage of 0.6 V was optimum for hydrogen production with hydrogen yield of 245 ml H2 gCOD⁻¹. Continuous microbial electrolysis r...
Article
Palm oil mill effluent (POME) is well known as the potential raw material for biogas production. However, the high hemicellulose and cellulose content (10–14% w/w in dry basis) of the palm fibre in POME are less accessible for biodegradable to sugars, therefore, limiting the carbon source for microorganisms for the biogas production. This study att...
Chapter
Full-text available
Dark hydrogen fermentation (DHF) is a process that can achieve two simultaneous objectives: the production of bioenergy and reduction of pollution. Complex microbio‐ logical communities containing efficient producers of hydrogen usually carry out the process. Ordinarily, control and operation strategies optimized the process by chemical and physica...