Interruption of sewer crown corrosion. Ecological solutions

Navnit A. Padival, Robert G. Arnold, Jeffrey Weiss

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Competitive inhibition of acid production by thiobacilli was investigated by encouraging the growth of potential competitors. Two-organism competition experiments (Thiobacillus sp. vs. heterotrophic yeast) were conducted in a bench-scale, continuous-flow reactor. Results were sensitive to the influent ammonia/glucose ratio. Under NH4+-limiting conditions, the concentration of T. thiooxidans or T. neapolitanus and acid production rates were reduced by about two orders of magnitude. Under carbon-limiting conditions, only modest reductions in the thiobacilli cell density and effluent sulfate were observed. In general, encouragement of microbial competition can interrupt acid production by thiobacilli and may inhibit crown corrosion in concrete sewers.

Original languageEnglish (US)
Title of host publicationEnvironmental Engineering
EditorsPeter A. Krenkel
PublisherPubl by ASCE
Number of pages6
ISBN (Print)0872628108
StatePublished - 1991
EventProceedings of the 1991 Specialty Conference on Environmental Engineering - Reno, NV, USA
Duration: Jul 8 1991Jul 10 1991

Publication series

NameEnvironmental Engineering


OtherProceedings of the 1991 Specialty Conference on Environmental Engineering
CityReno, NV, USA

ASJC Scopus subject areas

  • Environmental Engineering


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