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![Table 1 . AN-ISE sensor specification [23].](publication/317135882/figure/tbl1/AS:670525802160132@1536877217418/AN-ISE-sensor-specification-23_Q320.jpg)
Dynamic development of side-stream ammonia-rich streams treatment technologies creates need of new methods of control techniques. So far, most of available technologies are based on relatively simple sensors, such as pH probes. This article presents the results of an ion selective electrode used for controlling a one-stage deammonification process...
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The sludge digester effluent taken from a full scale municipal wastewater treatment plant (WWTP) in Istanbul, Turkey, was successfully deammonified using a laboratory scale two-stage partial nitritation (PN)/Anammox (A) process and a maximum nitrogen removal rate of 1.02 kg N/m3/d was achieved. In the PN reactor, 56.8 ± 4% of the influent NH4-N was...
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The steadily increasing production of pharmaceutical substances, their widespread use in health care for people and animals and inadequate disposal methods have attracted much interest in risks involved in the presence of these substances and their metabolites in the environment. Drugs present in wastewater are often resistant to biodegradation and can disturb biological processes of removing contaminants from wastewater. It should be emphasized that conventional wastewater treatment plants are not adapted to disposal of such contaminants as pharmaceutical substances. The aim of this study was to evaluate the effect of erythromycin on changes in dehydrogenase activity in activated sludge and oxygen uptake rate of the whole population of microorganisms of active sludge, heterotrophic bacteria and nitrifying bacteria of the first and second phase. A decline in activity of dehydrogenases of activated sludge in the presence of erythromycin was observed. With the concentration of this antibiotic of 150 mg/L, the lowest value of dehydrogenase activity was 35.5 μmol TF/gSS, whereas the degree of inhibition for this concentration reached 33.7%. It was also found that oxygen uptake rate declined for the entire population of microorganisms of active sludge in the presence of the antibiotic. The highest value of the inhibition degree for this oxygen uptake rate was 28.8%. Furthermore, an insignificant decline in the degree of inhibition of oxygen uptake rate was observed for heterotrophic bacteria (13.7%). The most sensitive to erythromycin were nitrifying bacteria. Degree of inhibition of oxygen uptake rate in the presence of this antibiotic for nitrifying bacteria of the first phase reached 40–64.5%, whereas for the bacteria of second phase, this value was 28.2–62%.
