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Application of nitrosomonas and anammox combination in a reactor for ammonium removal in swine wastewater

This study investigated the combination of two kinds of autotrophic bacteria, named Anammox and Nitrosomonas in a reactor to remove ammonium existed in swine wastewater. The reactor which was operated with swine wastewater taken from Dong A pig breeding enterprise (Di An, Binh Duong) had 15 liters volume. | Vietnam Journal of Science and Technology 55 (4C) (2017) 264-270 APPLICATION OF NITROSOMONAS AND ANAMMOX COMBINATION IN A REACTOR FOR AMMONIUM REMOVAL IN SWINE WASTEWATER Dang Van Dien1, *, Le Cong Nhat Phuong2, Nguyen Phuoc Dan3 1 Ho Chi Minh City University of Food Industry, 140 Le Trong Tan, Tan Phu district, HCMC 2 Institute of Tropical Biology, VAST, 9/621 Ha Noi highway, Thu Duc district, HCMC 3 Ho Chi Minh City University of Technology, 268 Ly Thuong Kiet, district 10, HCMC * Email: diendv@cntp.edu.vn Received: 11 August 2017; Accepted for publication: 17 October 2017 ABSTRACT This study investigated the combination of two kinds of autotrophic bacteria, named Anammox and Nitrosomonas in a reactor to remove ammonium existed in swine wastewater. The reactor which was operated with swine wastewater taken from Dong A pig breeding enterprise (Di An, Binh Duong) had 15 liters volume. The biomass carrier used in this model was made from the synthetic acrylic with attached capacity of 0.5-0.6g-SS/g-material. The sludge was taken from a reactor using partial nitritation/Anammox processes of a previous study at Vietnam Academy of Science and Technology. In 118 days of operation, average influent ammonium was 350mg/l, feeding to three loading rates (LR) 0.47, 0.70, 0.93 kg N-NH4+/m3/day with flow rate 20, 30, 40 liters, respectively. The highest efficiency was found at the first loading rate 0.47 kg N-NH4+/m3/day with 91.55 %. The other loading rates 0.70 and 0.93 kg NNH4+/m3/day gave lower efficiency, 78.08 and 70.5 %, respectively. VSS at the beginning and the end of the operation were 4g/l and 9.4 g/l, respectively. The optimum pH for the reactor was in range of 7.8 - 8.0. Keywords: anammox, ammonium, nitrosomonas, swine wastewater. 1. INTRODUCTION 1.1. Biochemical mechanism Based on investigation results by using isotopic method 15N, a biochemical mechanism for Anammox process was proposed [1]. The initial studies of Anammox showed that the combination .