Fate and removal of pesticides in wastewater treatment plants –case of Yeşilirmak basin

Download
2019
Kocaman, Kumru
The effluent of wastewater treatment plants (WWTP) had been shown to be a significant source of micropollutants in surface waters. In this study, the aim was to investigate the biological treatment of commonly found micropollutants in Yeşilırmak river basin, with special emphasis on the effects of operational conditions on their removal in conventional biological WWTPs. Based on the monitoring results of TÜBİTAK project (115Y013) “Management of Point and Diffuse Pollutant Sources in Yeşilırmak River Basin” carbendazim, imidacloprid and aclonifen pesticides were observed to exceed the relevant Environmental Quality Standards (EQSs) in one or more sampling campaign therefore these pesticides were selected to be studied. To study the influence of SRT and pesticide concentration on the overall treatment performance laboratory scale instantaneously fed Sequencing Batch Reactors(SBRs) with 5 different SRTs (3, 8, 10, 20 and 30 days) were operated and the effects of having the pesticides in the influent on the COD removal performance of the reactors were sought. Also, the removals of these pesticides, either individual or in mixture, were studied under different SRTs and influent pesticide concentrations (0-400g/L). COD utilization capacity of the reactors operated with a single pesticide were not disrupted remarkably until introduction of 50 g/L pesticide. However, COD utilization capacity of the reactors operated with mixture of pesticides were disrupted beyond the addition of 25 g/L of each pesticide. There exists no clear correlation between the elimination of pesticides and SRT.Removal efficiencies of aclonifen and carbendazim pesticides were better when the pesticides were spiked as mixture.

Suggestions

Qualitative evaluations about the disinfection capabilities of a water distribution network : a model study
Nadiroğlu, Coşkun; Köken, Mete; Aydın, İsmail; Department of Civil Engineering (2014)
“Chlorine” is one of the major disinfectants extensively used in distribution systems that neutralizes the disease-causing organisms. This model study evaluates the disinfection capabilities of a specific water distribution network N8.3 of Ankara water distribution system under various operating conditions. N8.3 supplies water, roughly to 40,000 people. The network is served by a pump station and pumping schedule is critical concerning the occurrence of minimum chlorine concentrations. Continuous “blind” pu...
Quantification of salmonella in treated biosolids from municipal wastewater treatment plants in four cities in Turkey using culture-based techniques
Aytaç, Begüm; Murdoch, Robert W.; Department of Environmental Engineering (2016)
Large quantities of biosolids are produced every day from wastewater treatment plants. In Turkey, because there is no legally permissible use for this sludge, it is mostly sent to landfills for disposal. Land application of biosolids is a useful and valid alternative for making use of this huge amount of sewage sludge. However, it must be assured that it is adequately safe for human contact and use. In this study, biosolid samples from four Turkish treatment plants (Ankara, Eskişehir, Kayseri and Yozgat) we...
Determination of thmfp of the reservoirs in Turkey : kinetics aspect
Artuğ, Mine; Dilek, Filiz Bengü; Department of Environmental Engineering (2004)
Chlorine is still the most commonly used disinfectant in many water treatment plants all over the World. However, studies conducted demonstrated that the chlorine reacts with the natural organic matter (NOM) in source waters, and leads to the formation of a variety of chlorinated organic compounds, disinfection by-products (DBPs). Among these, the most common are the trihalomethanes (THMs). In this study, kinetics of the THM formation was investigated. Kinetic experiments were carried out with the raw water...
Removal and recovery of nutrients as struvite from anaerobic digestion residues of poultry manure
Yılmazel Tokel, Yasemin Dilşad (Informa UK Limited, 2011-01-01)
The removal and the recovery of nutrients, namely nitrogen (N) and phosphorus (P) from anaerobically digested and solid-liquid separated manure effluents via struvite precipitation were investigated. Both the liquid and the solid phases of the poultry manure digester effluent were subjected to struvite precipitation experiments. The Mg:N:P molar ratio of 1:1:1 in the liquid phase resulted in an average NH4-N removal efficiency of 86.4%, which increased to 97.4% by adjusting the Mg:N:P ratio to 1.5:1:1. The ...
Control of trichloroethylene emissions from sparging systems by horizontal bio- and chemo-barriers
Tezel, U; Demirer, Göksel Niyazi; Uludag-Demirer, S (Informa UK Limited, 2005-02-01)
The scope of this study was to develop a continuous system to clean-up a trichloroethylene (TCE) contaminated gas stream, where biotic and abiotic removal mechanisms are undertaken sequentially simulating the horizontal bio- and chemo-barriers proposed for the in-situ remediation of the contaminated sites. The bio- and chemo-barriers were simulated by using glass columns packed with granular anaerobic mixed culture and Fe(0) filings, respectively. The effect of gas residence time, which is adjusted by the g...
Citation Formats
K. Kocaman, “Fate and removal of pesticides in wastewater treatment plants –case of Yeşilirmak basin,” M.S. - Master of Science, Middle East Technical University, 2019.