A5052467542- Wastewater Treatment and Nitrogen Removal
- Microbial Community Ecology and Physiology
- Anaerobic Digestion and Biogas Production
- Water Treatment and Disinfection
- Constructed Wetlands for Wastewater Treatment
- Membrane Separation Technologies
- Microbial Fuel Cells and Bioremediation
- Vibrio bacteria research studies
- Aquaculture disease management and microbiota
- Ammonia Synthesis and Nitrogen Reduction
- Fecal contamination and water quality
- Environmental DNA in Biodiversity Studies
- Electrochemical sensors and biosensors
- Methane Hydrates and Related Phenomena
- Microbial Metabolic Engineering and Bioproduction
- Plant Physiology and Cultivation Studies
- Water Quality and Pollution Assessment
- Wastewater Treatment and Reuse
- Water Quality Monitoring and Analysis
- Genomics and Phylogenetic Studies
- Gut microbiota and health
- Isotope Analysis in Ecology
- Salmonella and Campylobacter epidemiology
- Trace Elements in Health
- Electrochemical Analysis and Applications
National Institute of Technology
2024
National College of Technology, Wakayama College
2024
National Institute of Technology, Kagoshima College
2024
National Institute for Environmental Studies
2020-2023
Tohoku University
2010-2021
National Institute of Technology, Kisarazu College
2010
The stable operation of partial nitrification and anammox (PNA) process is a challenge in nitrogen removal from extremely low-strength ammonia wastewater like sewage mainstream. A moving bed reactor with functional carriers (30% filling rate) was developed to treat synthetic influent 50 mg/L ammonia. long-term results showed efficiencies 71.7 ± 9.1% have been stably obtained under relatively short hydraulic retention time 2 h. Microbial analysis revealed bacteria ammonium oxidizing (AOB)...
Water quality parameters influence the abundance of pathogenic bacteria. The genera Aeromonas, Arcobacter, Klebsiella, and Mycobacterium are among representative bacteria identified in wastewater. However, information on correlations between water these bacteria, as well their reduction rate existing wastewater treatment facilities (WTFs), is lacking. Hence, this study aimed to determine rates bacterial groups WTFs. Sixty-eight samples (34 influent 34 non-disinfected, treated, effluent...
Sediment microbial fuel cells (SMFCs) have served as an alternative technique to suppress phosphorus release from lake sediments water bodies and thus mitigate eutrophication. However, the regulation mechanism remains unclear. The purpose of this research was understand electrochemical influence SMFC on concentration in interstitial water. In study, a lab-scale applied acetate-spiked (ace+) unspiked (sed) with closed-circuit (CC)/open-circuit (OC) columns, circuitry switched investigate...
A microbial community structure of granules harvested from an anaerobic sludge blanket reactor treating phenolic wastewater was investigated using fluorescence in situ hybridization (FISH) and clone library construction. Clones Syntrophorhabdaceae Cryptanaerobacter were observed to be responsible for phenol degradation. For accurate taxonomic assignment clones, phylogenetic analysis nearly full-length 16S ribosomal RNA (rRNA) gene sequences necessary. Three oligonucleotide probes designed...
In this study, a pilot-scale down-flow hanging sponge (DHS) reactor was operated in the community plant of Bangkok for treatment domestic wastewater (COD 285 mg/L, BOD 105 mg/L) collected by separate sewer to evaluate reactor's feasibility as decentralized system. The DHS 600 days at ambient temperatures 25–30 °C, both with constant flow conditions and fluctuating that simulated discharge patterns community. results indicate under an HRT 5 h, volumetric loading rates 0.36 kgBOD/m3-sponge/day...
Abstract BACKGROUND: In this study, the inductive effect of salinity on nitrite accumulation in a down‐flow hanging sponge (DHS) reactor, developed as novel and cost‐effective wastewater treatment process, was evaluated by conducting long‐term continuous experiment lasting more than 1400 days. RESULTS: The influent controlled adding NaCl at concentrations ranging from 0 to 25 g Cl − L −1 . effluent increased with increases salinity, i.e. fraction total nitrogen 1.6% 87.6% Fluorescence situ...
Quantification of bacterial pathogens in the environment is crucial for determining their potential risk pathogenicity and infection. Here, we applied quantitative sequencing (qSeq) based on 16S rRNA gene with spike-in internal standards comprehensive pathogen quantification a municipal wastewater treatment plant (WWTP). A novel database biosafety levels (BSLs) was constructed rapid identification. Pathogen taxonomies were obtained from using basic local alignment search tool, amounts...
In this study, a lab-scale upflow anaerobic sludge blanket (UASB) reactor was applied to the treatment of artificial electronics industry wastewater containing tetramethylammonium-hydroxide (TMAH), monoethanolamine (MEA), and isopropyl-alcohol (IPA) in order evaluate process performance degradation properties. During 800 days operation, 96% efficiency chemical oxygen demand (COD) removal stably achieved at an organic loading rate 8.5 kgCOD/m3/day 18–19 °C. MEA degradation, carried out by...
Abstract The management of pathogenic bacteria in waterways is a public health issue. Here, we investigated the concentrations potentially bacteria, Arcobacter spp. and Campylobacter spp., Escherichia coli, by quantifying species-specific genes surface water samples from canals Chao Phraya River June 2017 to 2018 Bangkok, Thailand. We assessed relationship between specific bacterial concentrations, quality, seasonal changes. were detected at high density all showed fluctuations according...
Down-flow hanging sponge (DHS) reactors, employed in domestic wastewater treatment, have demonstrated efficacy eliminating Escherichia coli and other potentially pathogenic bacteria. The aim of this study was to elucidate the mechanism removal E. by employing a cube-shaped polyurethane carrier within compact reactor. An experiment conducted on prepared sponge. Escherichia. level found decrease more than 2 logs after passing through five nutrient-restricted DHS sponges. Conversely, newly...
ABSTRACT Anaerobic treatment of sulfur-rich wastewater is challenging because sulfide greatly inhibits the activity anaerobic microorganisms, especially methanogenic archaea. We developed an internal phase-separated reactor (IPSR) that removed prior to methanogenesis by gas stripping using biogas produced in reactor. The IPSR was fed with synthetic containing a very high concentration up 6,000 mg S L−1 chemical oxygen demand (COD) 30,000 L−1. operated at organic loading rate 5–12 kg COD m−3...