Study about the influence of the pH and temperature in a biological wastewater trickling filter with beds of attached biomass to small stones case study

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Courtesy of SURCIS, S.L.

Preliminaries
This service is carried out from the agreement reached by Surcis with an engineering company to conduct a study on the approach to analyze the influence of temperature and pH in a municipal wastewater treatment plant provided with a tricking filter process with small stones (as biomass carriers), where there is a very poor nitrification process performance.

This biological process is designed to remove organics and ammonium nitrogen. However, in winter time, the process operates under relatively low temperature (12ºC), fluctuant pH (6.5 to 7) and BOD/TN ratio of about 3. Those current conditions lead to think that they are the responsible of the lack of nitrification; but, in order to get strong arguments of confirmation, the company responsible of the plant management and maintenance wanted to get a respirometry study to analyze and assess the influence of the nitrification activity for the actual winter conditions and be compared with higher temperature (20ºC) and pH (8). On that purpose, it has ordered the present study.

Date: February/2012

Analyzer

The respirometry system used for the present study is a BM-Advance from SURCIS, S.L. equipped by a biomass-carrier reactor for the special stone bio-films.

Objective of the study

The objective of this study is to analyze the influence on the temperature and pH conditions in the nitrifying activity and ammonium uptake rate, for different combinations of 12ºC (or lower), 20ºC, not exceeding 7 and 8 of pH in the biofilm process.

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