The treatment of nitrocellulose industry wastewaters, characterized by high nitrate (1450–1990 mg/L) concentrations and low pH (1.45–1.57), was investigated by using denitrification filters. Methanol was added as external organic carbon source. The filter was filled with ceramic media and 50 to 100% effluent recirculation was applied. Alkalinity was produced during denitrification and increase in pH was observed. The system achieved 94–99% nitrate removal and effluent pH between 6.4 and 7.8, when pH of the influent wastewater was adjusted to 4. When the filter was filled with limestone media, 74 to 98% nitrate removal was achieved without any alkali addition. The denitrification rate was 229 mg NO3-N/m3/d. The two filters operated also in series, limestone filter being the first in the series receiving wastewater. The serial system was capable of reducing nitrate completely and neutralizing the pH into the weak alkali solution (7.08–7.82). The biologically produced alkalinity through denitrification could be beneficially used for the in situ neutralization and treatment of high influent nitrate containing acidic waters. These studies show that up-flow denitrification filters are suitable systems for treating acidic nitrocellulose industry wastewaters.
Environmental Processes – Springer Journals
Published: Jan 18, 2018
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.
All for just $49/month
Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.
Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.
It’s easy to organize your research with our built-in tools.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera