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Introduction
Yasar Avsar currently works at the Department of Environmental Engineering, Yildiz Technical University. Yasar does research in Civil Engineering, Ecological Engineering and Environmental Engineering. Their current project is sludge disposal, sludge disintegration, advanced wastewater treatment techniques.
Additional affiliations
January 2016 - February 2016
Publications
Publications (48)
Metal plating industry wastewater is a highly toxic wastewater due to its heavy metal and cyanide. This characteristic of wastewater is due to different types of processes used in the metal plating industry. In order to meet discharge limits for the receiving environment, classical chemical treatment methods are widely applied in this type of indus...
The collection of packaging wastes separately from domestic wastes is a legal requirement and has become a necessity due to the need for raw materials today. Due to the legislative requirements, disruptions in practice constitute an obstacle to create a successful waste management policy. The subject of this study is to provide a system that will h...
Sludge drying is one of the main problems of wastewater treatment plants. It is very important to facilitate the drying process in terms of drying efficiency, time duration and cost of the processes, so that transportation and dumping of sludge will accordingly be realized effectively. In this study, vacuum assisted thermal drying was studied. Unde...
It is known that wastewater produced by the metal-plating industry contains several heavy metals, which are acidic in nature and therefore toxic for the environment and for living creatures. In particular, heavy metals enter the food chain and accumulate in vital organs and cause serious illness. The precipitation of these metals is mostly achieved...
ABS TR AC T One of the major concerns of biogas plants can't be operated economical and environmental sustainable manner. In order to produce biogas in rural areas, using anaerobic systems with high organic content of farm wastes can be able to remove these concerns. The production of biogas can then be used for cooking, lighting and heating. Bioga...
The purpose of this research aims to investigate the feasibility of combined processes by applying electrocoagulation (EC), electrofenton (EF) enhanced by electrodialysis (ED) for treating a synthetic textile reverse osmosis (RO) concentrate stream, using different concentrations of dyes (mixture of reactive red 70% and reactive orange 30%) and mon...
ÖZET
Bilimsel çalışmalarda yeni ve daha ileri teknolojileri yakalamak için yeni tasarlanmış deney düzenekleri tercih edilmektedir. Bu durum bilimsel çalışmalarda bazı zorluklara neden olmaktadır. Bilindiği gibi her bilimsel çalışma neticesinde elde edilen bilimsel bulgular kendi zamanının zorluklarını aşarak ileriki zamanlarda insanlığa fayda sağla...
ÖZET Günümüzde yüksek organik içerikli atıkların arıtılması, biyogaz ve organik gübre üretiminde tercih edilen teknolojilerden biriside anaerobik çürütme sistemidir. Bununla birlikte organik içerikli atıkların mühendislik teknolojileri kullanılmadan doğaya atıldığı görülmektedir. Anaerobik çürütücüler arıtma ve biyogaz üretiminin yanı sıra bitki ih...
ÖZET Bilimsel çalışmalarda yeni ve daha ileri teknolojileri yakalamak için yeni tasarlanmış deney düzenekleri tercih edilmektedir. Bu durum ise bilimsel çalışmalarda bazı zorluklara neden olmaktadır. Bilindiği gibi her bilimsel çalışma ve neticesinde elde edilen bilimsel bulgular kendi zamanının zorluklarını aşarak ileriki zamanlarda insanlığa her...
Anaerobic digestion systems are currently the preferred technology for the treatment of high organic wastes, biogas and organic fertilizer production. However, organic wastes are still found in nature without the use of engineering techniques. Anaerobic digestion is a system for producing a good organic fertilizer suitable for plant needs as well a...
The present study utilizes an artificial neural network (ANN) as an estimation model of biogas production from laboratory-scale up-flow anaerobic sludge blanket (UASB) reactors treating cattle manure with co-digestion of different organic wastes. It can be estimated depending on working days, influent chemical oxygen demand, influent pH, influent a...
The objective of this study is to analyze the time processes of hazardous waste management (HWM) in Turkey. There should be a holistic evaluation of a country's hazardous waste management program in terms of theoretical qualifications, best practice applications, and, of course, problems and their solutions. This paper offers a similar approach to...
In this study, variations on the dewatering of filter cake sludge following microwave irradiation and conventional drying processes were investigated. The rates of dewatering and operating costs were calculated. One hundred percent dewatering of the sludge was accomplished using 800 W microwave power for 15 min. Conversely, filter sludge was dewate...
In this study, a bipolar membrane electrodialysis (BMED) process, which is thought to be an effective treatment method for leachate, was evaluated for leachates of three different ages ("young", "middle-aged" and "elderly"). The leachates were pretreated to eliminate membrane fouling problems prior to the BMED process. Experimental studies were car...
In this study, investigation of biogas production potential and adaption to cattle manure (CM) of flocular sludge seed that was supplied from the wastewater treatment plant digester. The study was carried out with five laboratory scale anaerobic reactors and two bottles of 6.15 L and 1.5 L capacity, respectively. According to the results of the stu...
This literature review surveys the previous and current researches on the co-digestion of anaerobic processes and examines the synergies effect of co-digestion with cattle manure. Furthermore, this review also pays attention to different operational conditions like operating temperature, organic loading rate (OLR), hydraulic retention time (HRT), c...
This study investigated the biological treatability of textile wastewater. For this purpose, a membrane bioreactor (MBR) was utilized for biological treatment after the ozonation process. Due to the refractory organic contents of textile wastewater that has a low biodegradability capacity, ozonation was implemented as an advanced oxidation process...
The current study simultaneously examined the treatability of wastewater by electrodialysis unit and recovery of ions removed as acidic/alkaline solutions. With a bipolar membrane electrodialysis process, the removed ions are stored separately in anolyte/catholyte solutions , and then turned into mixed acids and bases. After the treatment of the le...
The current study simultaneously examined the treatability of wastewater by electrodialysis unit and recovery of ions removed as acidic/alkaline solutions. With a bipolar membrane electrodialysis process, the removed ions are stored separately in anolyte/catholyte solutions , and then turned into mixed acids and bases. After the treatment of the le...
The current study simultaneously examined the treatability of wastewater by electrodialysis unit and recovery of ions removed as acidic/alkaline solutions. With a bipolar membrane electrodialysis process, the removed ions are stored separately in anolyte/catholyte solutions, and then turned into mixed acids and bases. After the treatment of the lea...
This study examined the treatability of leachate with the electrocoagulation process and its optimization using the response surface method. The three-parameter optimization process and a 5-level, 6-replicate central composite design were included in the investigation on a set of 36 pieces created for the study. A second-order full polynomial appro...
This study includes both the removal of heavy metals and chemical oxidation demand from metal plating wastewater with pH adjustment and electrocoagulation processes and a comparison of these two processes. For the pH adjustment, process experimental works were studied for five pH levels as 6.0, 7.0, 8.0, 9.0, and 10.0. Optimum removal rates obtaine...
Problem of reach to clean water seriously affects the world with increasing living standards and population. Due to limited resources of clean water, studies are now turning towards salty and ground water for obtained clean water. Capacitive deionization (CDI) is an economic and alternative process for can be removed ions from salty and groundwater...
This study presents biotreatment of textile wastewaters using electrocoagulation and ozone processes. Ozonation process gave better results than electrocoagulation process. For electrocoagulation, optimum working conditions were found as follows: pH, 6.5; electrode type, iron electrode; current density, 20 mA/cm2; and reaction time, 15 min. Under t...
Using a computer model, a traffic noise map was prepared for a 1-km section of one of the most frequently travelled roads in Istanbul. Calculations were carried out in grid intervals of 10 m at 4 m above ground level. Field measurements were also conducted for the same region. The traffic noise map and noise level measurements are compared. Predict...
This study deals with the rehabilitation of waste water treatment plant (WWTP) of Sakhnin city in Israel. To increase low
removal efficiency of the facultative pond (FP) and seasonal reservoir (SR) of the WWTP, different kinds of reactors having
different operating conditions were established by the name of two tasks such as intermittent trickling...
This study presents the results of a field study carried out at high schools to determine the effects of both indoor and outdoor noise levels on educational quality. Two schools having the highest outdoor noise levels due to dense commercial facility and car traffic in Istanbul were selected for the study from among 67 schools.The noise survey stud...
In this study, chemical oxidation demand (COD) and color removal efficiencies of a textile industry were tested using chemical and ozone oxidation treatment techniques. The industry uses chemical processes to treat its wastewater, so it needs much time and operation cost. Herein, the applicability of ozone oxidation techniques was discussed as an a...
This paper focuses on treatment performance charac-teristics of three reactors called tunnels 1, 2 and 3, with plug flow regime and different operating conditions, such as geotextile strips and aeration units. The effluent quality of wastewater increases towards the end of the tunnels. After a one-year monitoring pro-gramme, the tunnel 3, which inc...
The objective of this study was to upgrade a facultative pond (FP) unit operating at the domestic wastewater treatment plant (WWTP) in the municipal area of Sakhnin, which is located in the North of Israel (latitude 32.869155 and longitude 35.316570). For this aim, six experimental units of the intermittent trickling biofil- ters (ITBFs), with diff...
The aim of this study is to find the best empirical modeling approach for establishing intermittently fed biofilters (ITBFs). Three modeling approaches, including the Schultz-Germain, Velz, and Eckenfelder equations, were evaluated for removing soluble chemical oxygen demand (sCOD). Only sCOD variation was monitored and modeled. The ITBFs at a pilo...
In this study, the treatability of rose processing wastewater was investigated by using electrocoagulation (EC) methods compared to classical chemical (CC) and Fenton application (FA) processes. High chemical oxygen demand (COD) and dissolved solids contents were detected in the wastewater. Among these treatment applications, it was found that the...
In rural areas, insufficient wastewater treatment often causes serious environmental problems, especially for human health. Due to this problem, new wastewater treatment plants (WWTP) should be constructed or upgraded. When considering economic and maintenance factors, constructed wetlands (CWs) are more desirable processes. The available WWTP loca...
Golden Horn is an estuary in Istanbul. It has connection with Marmara Sea directly and with Black Sea via Bosphorus, and was polluted by different kinds of industrial plants up to 1999. In addition to this, municipal wastewater of around one million people has been discharged to here. Greater part of the estuary was almost blocked off by sediment i...
Water-based paint wastewater which is formed during the coating step of metal surfaces performed with various spray processes include binders, pigments and additives. Binders and other additives may also affect the toxicity of the paint depending on the specific characteristics of the paint. This study deals with Water-based paint wastewater, which...
The shores of the Golden Horn—once most important seaport of the region—represented throughout history a romantic and recreational venue. This tributary to the Bosphorus, however, became seriously polluted with the extensive industrialization and rapid population growth in Istanbul over the past century. Two main tributaries, the Alibeykoy and the...
Noise nuisance caused by road or highway depends on three main reasons; (1) type, speed and number of vehicles, (2) road surface structure sort and (3) characteristics of buildings and number of inhabitants.School buildings are often subjected to higher outdoor noise levels. Hence intelligibility of lessons by students is decreased.This study deals...
Noise measurements were made for 16 relevant outdoor points in the central campus area of Yildiz Technical University. All measurements were performed in accordance with Turkish Standards using an HD 9019 sound level meter. A new and sophisticated modelling technique called artificial neural networks was used to model the variation of noise levels...
SUMMARY In 1999, an extensive sludge dredging effort to im- prove the on-site septic conditions and those of sea trans- portation via the Golden Horn has been realized. In this study the contamination levels before and after this improvement project are investigated. For this pur- pose, the sediment samples taken from 6 different points in the bay...
In this study, noise measurements for relevant 22 outdoor points and some indoor ambience for sensitive places such as kindergarten, classrooms, library and exhibition centre at the central campus area of Yildiz Technical University were made. A map developed evaluated hourly noise values obtained for 5 months. By using the map, noise control measu...
In the municipal solid waste management systems, collection and hauling efforts cover 85 percent of total system expenditures that make quite huge amount of money for societies. In order to get reduction on those and to save resources, searching for optimization possibilities gains importance. In case of not using an optimization on collection, tot...