Person: KOCAMEMİ, BİLGE
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KOCAMEMİ
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BİLGE
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Publication Metadata only A novel approach in nzvi synthesis: reducing agent hydrazine recovery from deammonification wastewater(2021-09-08) ERKEN, ESRA; KOCAMEMİ, BİLGE; ERKEN E., KOCAMEMİ B., HÜR C.Publication Metadata only Atıksular ve atıksu arıtma çamurları ile Covid-19 takibi: Türkiye örneği, Türk Müşavir Mühendisler ve Mimarlar Birliği(2021-10-01) KOCAMEMİ, BİLGE; ERKEN, ESRA; KOCAMEMİ B., kurt h., ERKEN E., SAATÇI A. M.Publication Metadata only Nanoscale zero valent iron enhanced mainstream anammox application : a long-term evaluation with real sewage(2022-09-11) KOCAMEMİ, BİLGE; ERKEN, ESRA; KOCAMEMİ B., ERKEN E., kurt h.Publication Metadata only Nationwide SARS-CoV-2 surveillance study of Turkey for monitoring of covid-19 spread(2021-09-05) KOCAMEMİ, BİLGE; KOCAMEMİ B., KURT H., Sait A., Kadı H., Hacıoglu S., Sarac F., Aydın İ., SAATÇI A. M., Pakdemirli B.Publication Open Access Establishment of local wastewater-based surveillance programmes in response to the spread and infection of COVID-19-case studies from South Africa, the Netherlands, Turkey and England(2022-02-01) KOCAMEMİ, BİLGE; Tlhagale M., Liphadzi S., Bhagwan J., Naidoo V., Jonas K., van Vuuren L., Medema G., Andrews L., Been F., Ferreira M. L., et al.The COVID-19 pandemic has resulted in over 340 million infection cases (as of 21 January 2022) and more than 5.57 million deaths globally. In reaction, science, technology and innovation communities across the globe have organised themselves to contribute to national responses to COVID-19 disease. A significant contribution has been from the establishment of wastewater-based epidemiological (WBE) surveillance interventions and programmes for monitoring the spread of COVID-19 in at least 55 countries. Here, we examine and share experiences and lessons learnt in establishing such surveillance programmes. We use case studies to highlight testing methods and logistics considerations associated in scaling the implementing of such programmes in South Africa, the Netherlands, Turkey and England. The four countries were selected to represent different regions of the world and the perspective based on the considerable progress made in establishing and implementing their national WBE programmes. The selected countries also represent different climatic zones, economies, and development stages, which influence the implementation of national programmes of this nature and magnitude. In addition, the four countries\" programmes offer good experiences and lessons learnt since they are systematic, and cover extensive areas, disseminate knowledge locally and internationally and partnered with authorities (government). The programmes also strengthened working relations and partnerships between and among local and global organisations. This paper shares these experiences and lessons to encourage others in the water and public health sectors on the benefits and value of WBE in tackling SARS-CoV-2 and related future circumstances.Publication Metadata only Routine wastewater surveillance in Turkey to control covid-19 outbreak(2021-04-20) KOCAMEMİ, BİLGE; KOCAMEMİ B., KURT H., Sait A., Kadı H., Sarac F., Aydın İ., SAATÇI A. M., Pakdemirli B.Publication Metadata only Wastewater-Based Epidemiology (WBE) Studies for Monitoring of Covid-19 Spread(Springer International Publishing, 2022-01-01) KOCAMEMİ, BİLGE; ERKEN, ESRA; KOCAMEMİ B., Kurt H., ERKEN E., SAATÇI A. M.Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) started in Wuhan, China, in December 2019 and was announced as a worldwide pandemic spread by WHO on March 11, 2020. The countries have started to monitor surveillance of SARS-CoV-2 through medical tests. However, people with no or very light symptoms are usually not medically tested or never hospitalized, and their test results missed. In March 2020, it was recognized that the urine and feces of all infected people contain SARS-CoV-2. After that, wastewater-based epidemiology studies have gained significant importance around the world. This chapter aims to describe the basics of wastewater-based epidemiology (WBE) studies, the current situation in the world together with the post-Covid-19 approaches. Additionally, the major challenges in Covid-19 WBE studies are discussed.Publication Open Access First Data-Set on SARS-CoV-2 Detection for Istanbul Wastewaters in Turkey(2020-01-01) KOCAMEMİ, BİLGE; KOCAMEMİ B.Publication Open Access SARS-CoV-2 detection in Istanbul wastewater treatment plant sludges(2020-01-01) KOCAMEMİ, BİLGE; KOCAMEMİ B.Following the announcement of SARS-CoV-2 worldwide pandemic spread by WHO on March 11, 2020, wastewater based epidemiology received great attention in several countries: The Netherlands [Medama et al., 2020; K-Lodder et al., 2020], USA [Wu et al., 2020; Memudryi et al., 2020], Australia [Ahmed et al., 2020], France [Wurtzer et al., 2020], China [Wang et al., 2020], Spain [Randazzo et al., 2020; Walter et al., 2020], Italy (La Rosa et al., 2020; Rimoldi et al., 2020) and Israel [Or et al., 2020], performed analysis in wastewaters by using different virus concentration techniques. Turkey took its place among these countries on 7th of May, 2020 by reporting SARS-CoV-2 RT-qPCR levels at the inlet of seven (7) major municipal wastewater treatment plants (WWTPs) of Istanbul [Alpaslan Kocamemi et al., 2020], which is a metropole with 15.5 million inhabitants and a very high population density (2987 persons/km2 ) and having about 65 % of Covid-19 cases in Turkey. Sludges that are produced in WWTPs should be expected to contain SARS-CoV-2 virus as well. There has not yet been any study for the fate of SAR-CoV-2 in sludges generated from WWTPs. Knowledge about the existing of SARS-CoV-2 in sludge may be useful for handling the sludge during its dewatering, stabilizing and disposal processes. This information will also be valuable in case of sludges that are used as soil conditioners in agriculture or sent to landfill disposal. In wastewater treatment plants, generally two different types of sludges are generated; primary sludge (PS) and waste activated sludge (WAS). PS forms during the settling of wastewater by gravity in the primary settling tanks. Little decomposition occurs during primary sludge formation. Since most of the inorganic part of the wastewater is removed in the earlier grit removal process, the PS consists of mainly organic material that settles. The PS is about 1-2 % solids by weight. In the biological treatment part of the WWTPs, the biomass that forms in the anaerobic, anoxic and oxic zones of the process is settled in final clarifiers by gravity and returned to the beginning of the biological process so that it is not washed off. The waste activated sludge (WAS) is the excess part of the biomass that grows in this secondary treatment process. It has to be removed from the process not to increase the mixed liquor suspended solids concentration (bacteria concentration) in the secondary process more than a fixed value. The WAS is about 0.6 - 0.9 % solids by weight. This work aims to find whether SARS-CoV-19 is present in the PS and WAS before it is dewatered and sent to anaerobic or aerobic digester processes or to thermal drying operations. For this purpose, on the 7th of May 2020, two (2) PS samples were collected from Ambarlı and Tuzla WWTPs, seven (7) WAS samples were collected from Terkos, Ambarlı, Atakoy I & II, Pasakoy II, Buyukcekmece and Tuzla I WWTPs. Polyethylene glycol 8000 (PEG 8000) adsorption [Wu et al., 2020] SARS-Cov-2 concentration method was used for SARS-CoV-2 concentration after optimization. [Alpaslan Kocamemi et al., 2020]. Real time RT-PCR diagnostic panel validated by US was used to quantify SARS-CoV-2 RNA in primary and waste activated sludge samples taken from WWTPs in Istanbul. All samples were tested positive. Titers of SARS-CoV-2 have been detected ranging copies between 1.17x104 to 4.02x104 per liter.Publication Open Access Short-Term Effects of Operating Parameters and Wastewater Constituents on the Performance of Free-cell Candidatus Brocadia and Candidatus Scalindua Anammox Enrichment(2022-10-01) KOCAMEMİ, BİLGE; KOCAMEMİ B., Dityapak D.Anammox, is a state-of-art nitrogen removal technology for domestic and industrial wastewater treatment. Anaerobic chemolithoautotrophic Anammox species are quite sensitive to operating parameters and various inorganic and organic compounds. Previous Anammox research was mainly on mixed cultures including Ca.Brocadia and/or Ca.Kuenenia species that are abundant in domestic wastewater. Little information exists about the mixed Anammox cultures including Ca.Scalindua species known as marine Anammox species that also present in WWTPs receiving sea-water infiltrated sewage, saline-rich wastewater in coastal cities and saline-rich industrial wastewater. In this study, the influence of operating parameters and organic and inorganic wastewater constituents on the performance of mixed suspended Ca.Brocadia and Ca.Scalindua Anammox enrichment was evaluated based on Specific Anammox Activity (SAA). Response surface methodology was used to model the relationship between pH, DO and temperature changes with SAA. Optimum pH and temperature were identified as 7.36 and 32.7(0)C, respectively. Short-term inhibitory (IC50) values of acetate, propionate and glucose were identified as 1000-1500, 3300 and 3600-5700 mg COD/L, respectively. NO2--N caused Anammox inhibition above 50 mg/l. IC50 values for SO42-, PO43--P and K+ were determined as 3500 mg SO42-/L, 1384 mg PO43--P/L and 2400 mg K+/L. The study provides a comprehensive insight into the tolerance of Ca.Brocadia and Ca.Scalindua enrichment against changing operational conditions and potential inhibiting compounds and facilitates optimization of operational strategies for the efficient performance of engineered Anammox systems. The findings will also contribute to future research activities that will focus on composite inhibitors and metabolic inhibition pathways.