Hüseyin Güven

Istanbul Technical University · Department of Environmental Engineering

The main aim of the study was to evaluate the co-digestion performance of OFMSW with different wastes. Leachate, reverse osmosis (RO) concentrate collected from a leachate treatment facility and dewatered sewage sludge taken from a wastewater treatment plant (WWTP) were used for co-digestion in this paper. An extra effort was made to observe the ef...

Handbook of Solid Waste Recycling and Treatment Technologies

Life cycle assessment (LCA) is a beneficial tool to evaluate the performance of wastewater treatment plants (WWTPs) and to compare different upgrading options. The main objective of this study is to investigate the environmental impact of upgrading options of a preliminary WWTP in Istanbul, Turkey. The preliminary plant currently consists of mechan...

In the last decades, energy scarcity has become an important issue globally. Renewable energy sources have gained importance due to limited fossil fuel reserves and increased concerns on climate change. In this regard, municipal wastewater is a remarkable energy source since huge amounts of wastewater are generated and treated all over the world ev...

In developing countries like Turkey, food waste has the highest share compared to other municipal solid waste components. A detailed life cycle assessment has been performed to evaluate different food waste management options (i.e., landfilling, anaerobic digestion, thermal treatment, co-treatment with municipal wastewater) for Istanbul which is th...

Coagulants such as aluminum sulfate (Al2(SO4)3 (alum)) and ferric chloride (FeCl3) used in water treatment plants (WTPs) led to the generation of sludge that is usually disposed to landfills. However, the utilization of WTP sludge is being encouraged by authorities to achieve sustainable development. This study aims to investigate WTP sludge utiliz...

Yapılan çalışmada yemek hazırlama aşamasında oluşan mutfak atıklarının bahçe tipi basit sistemlerle kompostlaştırılması incelenmiştir. Bu kapsamda boyutları 0,7m x 0,7m x 1,1m (R1) ve 0,6m x 0,6m x 1,1m (R2) olan iki adet reaktör kurulmuş ve 7 hafta müddetince işletilmiştir. Çalışma sonunda, reaktörlerdeki sıcaklık profili incelendiğinde R1 reaktör...

Grey water is a valuable water source due to its high-volume generation. This study was conducted with grey water that was obtained from a hotel with 1000 inhabitants and average flowrate of 40 m3/day. The main objective of the study was to determine the optimum operational conditions for ozonation process in terms of micropollutant removal along w...

The per capita expenditure of water and sewerage administrations (WSA) is an important indicator of the performance and characteristics of WSAs. In this context, the effects of different parameters on the per capita expenditure of WSAs were examined. Investigated parameters were selected as service time, region, population, and metropolitan municip...

Biogas production from anaerobic sludge digestion plays a central role for wastewater treatment plants to become more energy-efficient or even energy-neutral. Dedicated configurations have been developed to maximize the diversion of soluble and suspended organic matter to sludge streams for energy production through anaerobic digestion, such as A-s...

There have been many important milestones on humanity's long journey towards achieving environmental sanitation. In particular, the development of the activated sludge system can be claimed to be one of the most groundbreaking advances in the protection of both public health and the wider ecosystem. The first wastewater treatment plants (WWTPs) wer...

In recent years, there has been an increase in the interest on organic compounds originating from anthropogenic activities. The presence of these micropollutants in waterbodies can be detrimental for the aquatic organisms even at their trace concentrations. Removal of micropollutants from wastewater by conventional treatment methods is quite limite...

Güncel projeksiyon çalışmaları, insanlığın temel ihtiyacı olan ve büyük oranda tarım sektörü için gübre üretiminde kullanılan fosfora ait doğal kaynakların önümüzdeki birkaç yüzyıl içerisinde tükenebileceğini göstermektedir. Pek çok ülke fosfor ihtiyacını ithal yol ile karşılamaktadır ve tarımsal üretiminin devamlılığı için dışa bağımlıdır. Dolayıs...

The limited available area for treatment plants in population-dense settlements increases the need for technologies with smaller footprints. The high-rate activated sludge (HRAS) process aims to capture carbon from wastewater by limiting biological assimilation with a high loading rate which enables occupying a smaller footprint. The footprint of t...

Energy-rich sludge can be obtained from primary clarifiers preceding biological reactors. Alternatively, the incoming wastewater can be sent to a very-high-loaded activated sludge system, i.e., a so-called A-stage. However, the effects of applying an A-stage instead of a primary clarifier, on the subsequent sludge digestion for long-term operation...

The “circular economy” practices within the concept of sustainability offer solutions to the problem of uncontrolled production and irresponsible consumption that the world is trying to overcome. Approaches are being developed within the framework of circular economy in many areas from economy to environment, from education to local government poli...

All inputs and outputs of a technical system can be interpreted from an environmental point of view and some modifications, that are less harmful to the environment, can be incorporated into the system by using the life cycle assessment (LCA) approach. The energy footprint of wastewater treatment plants (WWTPs) is one of the most important environm...

Energy demand of wastewater treatment plants (WWTPs) is counted as an important energy consumer especially in developed and developing countries. Environmental concerns and pressure on freshwater resources have caused to implement energy-intensive wastewater treatment processes and thus highly energy demanding WWTPs. Although wastewater itself hold...

Dünya'daki suların yaklaşık %97'si tuzlu olduğundan içme ve kullanma maksatları için doğrudan kullanılamaz durumdadır. Kalan %3'lük kısım ise Dünya genelinde eşit derecede ulaşılabilirliğe sahip olmayan tatlı sudur. Gelecekte, küresel iklim değişimi sebebiyle nehir akışlarının %20-30 oranında azalacağı tahmin edildiğinden, ileri derecede arıtılmış...

Farklı ölçekteki (laboratuvar, pilot ve tam (kurulu)) tesislerden elde edilen sonuçların analizi veya daha küçük ölçekli tesis sonuçlarının gerçek ölçekli tesis tasarımı için uyarlanması mühendislikte en yaygın ve önemli konulardan biridir. Mühendislikte Fiziksel Modelleme: Teorik Esaslar, Model-Prototip İlişkileri başlıklı bu kitap, üniversiteleri...

This study investigated the environmental and technical feasibility of the high-rate activated sludge (HRAS) system and post oxidation for five large wastewater treatment plants (WWTPs) of Istanbul Water and Sewerage Administration (ISKI) already discharging effluents into the lower stratum of the Bosporus. A two-year HRAS pilot-scale study was con...

Purpose Rough estimations of water gain through greywater reuse and rainwater harvesting together with energy recovery from wastewater generated from a fictitious eco-city of population 100,000 located in Istanbul, Turkey form the main framework of the study. As such, the highly important concept of water–energy nexus will be emphasised and domest...

Conventional activated sludge (CAS) process is one of the most commonly applied processes for municipal wastewater treatment. However, it requires a high energy input and does not promote energy recovery. Currently, high-rate activated sludge (HRAS) process is gaining importance as a good option to reduce the energy demand of wastewater treatment a...

The study is a follow-up on rubric-based assessment of level of attainment of Student Outcomes (SOs) in Environmental Engineering undergraduate education by the senior-year Graduation Design Project (GDP): the focal points are the process of and results from incorporation of additional assessment tools and implementation of "Performance Indicator (...

Food waste contains an important amount of energy potential, however, appropriate methods should be employed in order to recover this potential. Landfilling is one of the most common waste management methods but, it has many negative impacts on the environment due to releasing liquid and gaseous emissions. In the last decades, open dumpsites have t...

The study is a follow-up on rubric-based assessment of level of attainment of Student Outcomes (SOs) in Environmental Engineering undergraduate education by the senior-year Graduation Design Project (GDP): the focal points are the process of and results from incorporation of additional assessment tools and implementation of “Performance Indicator (...

A smart city should be based on water, energy and material savings together with other principles like urban ecology, biodiversity, transportation, industry, and last but not the least, economy. These essential parameters altogether need to be taken into consideration during establishing cities of future predicting sustainability with especially ef...

Conventional activated sludge (CAS) technology has been the most commonly applied technology for treatment of municipal wastewater for more than a century; however, a significant portion of energy content of the wastewater cannot be recovered by this technology. Therefore, different modifications can be applied to the CAS technology in order to inc...

In this study, the excess sludge from a pilot scale high rate activated sludge (HRAS) system was digested under mesophilic conditions. For this purpose, a laboratory scale digester was operated for 97 days. The digester had a working volume of 6 L and it was operated under 20 days of sludge retention time (SRT). Organic loading rate (OLR) was appli...

This paper focused on the composting of vegetable and fruit scraps in simple composting units. In the study, two home-made reactors were used. The reactors were operated for 7 seven weeks and at the end of the process several analyses were done to evaluate the compost quality. The results revealed that the carbon and nitrogen ratios of the final pr...

The main aim of the study was to evaluate the co-digestion performance of OFMSW and leachate. Leachate, reverse osmosis (RO) concentrate collected from a leachate treatment facility and dewatered sewage sludge were also used for co-digestion processes. In the study, OFMSW, leachate, RO concentrate and sewage sludge were used to simulate co-digestio...

Cities of the future need to be planned as eco-cities intending efficient water and energy use. In that sense, alternative water resources are searched. Among the potential ones, the two popular ones are greywater reuse and rainwater harvesting. The study refers to the basic advantages of these water resources and to the driving factors and main pa...

Eco-cities are expected to be established in line with sustainability concept for the sake of energy minimization which in turn leads to less greenhouse gas emissions. Waste and wastewater management issues should not be underestimated while designing eco-cities. Not only environmental merits; but also, economic contributions could be provided acco...

Co-Treatment of Organic Solid Wastes and Municipal Wastewaters

In this paper, improvement in biogas production and its total energy equivalence were evaluated in the case of kitchen waste (KW) integration, and results were compared with the current situation (without KW integration) at a municipal wastewater treatment plant (WWTP) located in one of the metropolitan cities in Turkey. Moreover, the effect of dif...

Evaluation of Different Solid Waste Management Scenarios in Terms of Greenhouse Gas Emissions

Istanbul, located between Europe and Asia, is one of the megacities of the world with a population of approximately 14 million people residents. Similar to other megacities, insufficient infrastructure, traffic jam at peak hours, unplanned urbanization and environmental stress are the main arising problems in Istanbul. Due to high population increa...

Waste incineration has been one of the waste disposal methods for many years. In the past, waste incineration was known as a disreputable technology since it had poor process control in terms of emissions, odor, residuals and etc. However the term of waste incineration is replaced with the term of energy from waste incineration (EfWI) recently. Hig...

This study is dedicated to determining and evaluating municipal solid waste flows of Turkey with respect to EU-coherent waste management scenarios. The study initially evaluates Environmental Heavy-Cost Investment Planning (EHCIP) Project supported by the European Union (EU) and financed by the Central Finance and Contracts Unit (CFCU), and Nationa...

In this study, three separate waste management scenarios were studied for Turkey regarding the period of 2003-2032, and the amount of greenhouse gases (GHGs) released to the atmosphere was calculated regarding the period of 2003-2052. In the first scenario, most of the generated municipal solid waste (MSW) is considered to be sent to sanitary landf...