Wastewater from the dye industry contains high level of organic nitrogen derived from
urea. Thus, an effective nitrogen removal process is needed to reduce effluent nitrogen
concentration. We have developed a new nitrogen removal process using non-woven
biomass carriers. In this study, we used pile fabrics, which are products of the local
industry in the Wakayama prefecture, instead of non-woven materials as biomass carriers
to improve nitrification rates. Several pile fabrics were then used for nitrification and
continuous nitrification/denitrification experiments. The specific NOx-N production rate
using an acrylic pile fabric was 3.4 times higher than that of non-woven carriers. About
75% nitrification efficiencies were obtained under a T-N loading rate of 0.5 kg-N/m3/day
and a HRT of 10 hours during continuous nitrification using acrylic pile fabrics.
Furthermore, continuous nitrification/denitrification experiments were carried out using
acrylic pile fabrics in a base cloth with a mesh structure to improve the diffusion rates.
Little biomass accumulated on the pile fabric surfaces so a high diffusion rate through the
pile was maintained for long periods. Denitrification efficiencies of 56 and 77 % were
achieved at HRTs of 12 and 19 hours, respectively, with influent concentrations of 200 mg/l
T-N and 450 mg/lTOC.
雑誌名
日本水処理生物学会誌
巻
46
号
2
ページ
71 - 79
発行年
2010-06-15
書誌レコードID
AN00351126
DOI
https://doi.org/10.2521/jswtb.46.71
権利
Copyright (c) 2010 by Japanese Society of Water Treatment Biologyer Treatment Biology
Nitrogen Removal from Dye-Industry Wastewater using Pile Fabrics as Biomass Carriers
JSWTB_46_2_2010_071-079.pdf
(1.71MB)
