Browsing by Author "LEE Der-Ming"

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METHOD AND DEVICE FOR TREATING WASTEWATER CONTAINING TETRAMETHYLAMMONIUM HYDROXIDE AND AMMONIUM NITROGEN
(2015-03-19)
LEE Der-Ming
;
CHIANG Ming-Kuei
;
CHEN Chin-Te
;
SUNG Keng-Chuan
;
LAN Chien-Ju
A method for treating wastewater containing TMAH and ammonium nitrogen includes the steps of (a) introducing a first solution which contains ammonium nitrogen but no TMAH into a single reactor with microorganisms comprising nitrifying bacteria and anammox bacteria, and denitrifying the first solution by the microorganisms under a dissolved oxygen concentration ranging from 0.1-0.5 mg/L and a pH value of 7-8; (b) when the denitrification efficiency reaches a steady state, introducing a second solution which contains ammonium nitrogen and TMAH and has a concentration of TMAH lower than 60 mg/L into the reactor; and (c) gradually increasing the concentration of TMAH in the solution to be added into the reactor for several times whenever the denitrification efficiency reaches a steady state. Accordingly, the inhibition of TMAH to the anammox bacteria can be significantly decreased, and both TMAH and the ammonium nitrogen can be treated simultaneously.
WASTEWATER TREATMENT METHOD USING ANNULARLY ARRANGED MICROORGANISM CARRIERS
(2013-03-07)
LEE Der-Ming
;
Chiang Ming-Kuei
;
Chen Chin-Te
;
Sung Keng-Chuan
;
Lin Jih-Gaw
A wastewater treatment method using annularly arranged microorganism carriers in a reaction tank, which defines therein an upper reaction area, a lower reaction area and a passage area surrounded by the microorganism carriers and kept in communication between the upper reaction area and the lower reaction area. Microorganisms including nitrifying bacteria and autotrophic denitrifying bacteria are attached to the surface of each microorganisms carriers and suspending in the water of the reaction tank for causing Anammox reaction to convert NH4+ and NO2− in wastewater into nitrogen gas, achieving removal of total nitrogen compounds from water. The microorganism carriers are used to retain microorganisms in the reaction tank, enhancing the treatment efficiency.