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Nitrogen Removal Efficiencies for Two Biological Nutrient Removal （BNR） plants in Thailand： Molasses as an External Carbon Source for Enriched Denitrifying Culture in a BNR process

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Journal of Environmental Science and Engineering 2011年第10期5卷 1245-1251页

作者： p.l. noophan p. pajorn S. Sirivithayapakorn M. Damrongsri C. Wantawin Department of Environmental Engineering Faculty of Engineering Kasetsart University Bangkok 10903 Thailand Department of Environmental Engineering Faculty of Engineering King Mongkut＇s University of Technology Thonburi Bangkok 10140 Thailand

Two biological nutrient removal （BNR） wastewater treatment plants （WWTps） in Thailand were selected for study： the Nonghkaem WWTp and the Suvarnabhumi Airport WWTp. For each site the influents, effluents, and supernatant liquids from anaerobic sludge digesters were analyzed for total Kjeldahl nitrogen （TKN）, total nitrogen （TN）, total chemical oxygen demand （TCOD）, biodegradable chemical oxygen demand （bCOD）, and biochemical oxygen demand （BOD）. Nitrogen removal efficiencies in the Nonghkaem WWTp and the Suvarnabhumi Airport WWTp were evaluated. Inadequate nitrogen removal at the Nonghkaem centralized WWTp was found during the summer period. Influent ratios of bCOD：N at the Nonghkaem plant and the Suvarnabhumi Airport plant were 2.42：1-5.45：1 and 4.1：1-6.5：1, respectively. The efficacy of addition of molasses as a carbon source for enriched denitrifying culture in a BNR process at Nonghkaem was studied. Fluorescent in situ hybridization technique （FISH） was used to identify specific nitrifying bacteria （Nitrosomonas spp., Nitrobacter spp. and Nitrospira spp.）. Nitrospira spp. was the most prevalent species in the aeration tank at the Nonghkaem WWTp. This result from FISH suggests that there were significantly low oxygen and nitrite concentration in the aeration tank at the Nonghkaem WWTp during a period of low nitrogen removal.

关键词： Nitrogen removal efficiency biological nutrient removal Thailand

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Nitrogen removal efficiencies and microbial communities in full-scale IFAS and MBBR municip.l.wastewater treatment plants at high COD:N ratio

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Frontiers of Environmental Science & Engineering 2020年第6期14卷 251-263页

作者： Supaporn phanwilai Naluporn Kangwannarakul pongsak(lek)noophan Tamao Kasahara Akihiko Terada Junko Munakata-Marr linda Ann Figueroa Department of Environmental Enginering Faculty of EngneringKasetsart UnivrsityBangkok 10900Thailand laboratory of Ecohydrology Division of Forest SciencesDepartment of Agro-enironmental SciencesKyushu UniversityFukuoka 819-0395Japan Deparment of Chemicl Enineing and Instite of Global Imovain Rescarch Tokyo University of Agrcature&TechnoloTokyo 184-8588Japan Depatmtent of Civil and Enivonmenal Enincrn Colordo School of Mines Goldeco 80401USA

The relative locations of AOB,NOB,and DNB were examined for three different kinds of carriers in two types of hybrid bioflm process configurations:integrated fixed-film activated sludge(IFAS)and moving bed bioflm reactor(MBBR)*** water resource recovery facilities(WRRFs)used Anodkainess^TM K1 carriers(KC)at Broomfield,Colorado,USA and p.l.prop.l.ne resin crriers(R)at Fukuok,Japa,whic MBBR WRFS used KC crier at South Adams Couty,Colorado,USA and sponge carriers(SC)at Saga,*** COD to N ratios ranged from 8:1 to 15:*** COD and BOD removal efficiencies were high(96%-98%);NH^+4-N and TN removal efficiencies were more varied at 72%98%and 64%-77%,*** extent of TN removal was higher at high SRT,high COD:N ratio and low DO concentration in the anoxic *** IFAS,RC with high specific surface area.(SSA)maintained higher AOB pop.l.tion than *** carriers with high SSA maintained higher overall bacteria pop.l.tion than KC in MBBR ***,the DNB were not more abundant in high SSA *** diversity of AOB,NOB,and DNB was fairly similar in different *** *** over Nitrosospira *** denitrifying bacteria included Rhodobacter sp.,Sulfuritalea sp.,.Rubrivivax sp:paracoccus sp..and pseudomonas *** results from this work suggest that high SRT,***:N ratio,low DO concentration in anoxic tanks,and carriers with greater surface area may be recommended for high COD,BOD and TN removal in WRRFs with IFAS and MBBR systerms.

关键词： IFAS MBBR Anokaness^TM K1 carrier p.l.prop.l.ne resin carrier Sponge carrier

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