The University of Southampton
University of Southampton Institutional Repository

The monitoring of a two steps aerobic-anoxic process with separate biomass to enhance performances in the treatment of liquid industrial wastes

The monitoring of a two steps aerobic-anoxic process with separate biomass to enhance performances in the treatment of liquid industrial wastes
The monitoring of a two steps aerobic-anoxic process with separate biomass to enhance performances in the treatment of liquid industrial wastes
The paper presents the results of a one-year study of the performance of a full scale plant for the treatment of industrial liquid wastes adopting the alternate cycle process. The carbon and nitrogen removal performances were discussed according to the experimental measurements of maximum nitrification and denitrification rates. It was demonstrated that the nitrification process was the limiting step: it worked with a rate in the range 0.002 - 0.02 KgNH4-N kg-1VSS d-1 at 20°C. This was because of inhibition phenomena due to the presence of both complex organic compounds and heavy metals which were not removed by the chemical-physical pre-treatment step. The denitrification process was characterized by a maximum rate ranging from 0.015 to 0.056 Kg NO3-N kg-1VSS d-1 at 20°C, according to the available amount of readily biodegradable COD in the treated wastes. The reliability of the aerobic-anoxic process was determined on the basis of the percentage of successful cycles compared with the performed ones. It was shown that the actual cycles ranged from 50 to 100% of the expected ones, while effective cycles were up to 84% in the first step and up to 60% in the second one. These were related to the carbon to nitrogen ratio. Even if at times the nitrogen and carbon removal yields were not satisfactory, the two step aerobic-anoxic process operated in the alternate cycle mode seems a successful solution for the treatment of liquid industrial wastes.
0959-3330
73-84
Bolzonella, D
554b33d4-ce6f-4d05-93ac-fcc5d49187f3
Battistoni, P.
2a94baea-0790-45d0-8aff-f3d0829b62a3
Boccadoro, R.
aea4baa6-3fde-40eb-82da-42162692ae64
Pavan, P.
5be0a23e-97f8-42a2-b244-7fd0890cff48
Bolzonella, D
554b33d4-ce6f-4d05-93ac-fcc5d49187f3
Battistoni, P.
2a94baea-0790-45d0-8aff-f3d0829b62a3
Boccadoro, R.
aea4baa6-3fde-40eb-82da-42162692ae64
Pavan, P.
5be0a23e-97f8-42a2-b244-7fd0890cff48

Bolzonella, D, Battistoni, P., Boccadoro, R. and Pavan, P. (2002) The monitoring of a two steps aerobic-anoxic process with separate biomass to enhance performances in the treatment of liquid industrial wastes. Environmental Technology, 23 (1), 73-84.

Record type: Article

Abstract

The paper presents the results of a one-year study of the performance of a full scale plant for the treatment of industrial liquid wastes adopting the alternate cycle process. The carbon and nitrogen removal performances were discussed according to the experimental measurements of maximum nitrification and denitrification rates. It was demonstrated that the nitrification process was the limiting step: it worked with a rate in the range 0.002 - 0.02 KgNH4-N kg-1VSS d-1 at 20°C. This was because of inhibition phenomena due to the presence of both complex organic compounds and heavy metals which were not removed by the chemical-physical pre-treatment step. The denitrification process was characterized by a maximum rate ranging from 0.015 to 0.056 Kg NO3-N kg-1VSS d-1 at 20°C, according to the available amount of readily biodegradable COD in the treated wastes. The reliability of the aerobic-anoxic process was determined on the basis of the percentage of successful cycles compared with the performed ones. It was shown that the actual cycles ranged from 50 to 100% of the expected ones, while effective cycles were up to 84% in the first step and up to 60% in the second one. These were related to the carbon to nitrogen ratio. Even if at times the nitrogen and carbon removal yields were not satisfactory, the two step aerobic-anoxic process operated in the alternate cycle mode seems a successful solution for the treatment of liquid industrial wastes.

Full text not available from this repository.

More information

Published date: 2002

Identifiers

Local EPrints ID: 185899
URI: http://eprints.soton.ac.uk/id/eprint/185899
ISSN: 0959-3330
PURE UUID: ae4dc73b-609c-4fa2-ae47-060879a5efbf

Catalogue record

Date deposited: 12 May 2011 10:41
Last modified: 16 Jul 2019 23:38

Export record

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×