Halis Simsek

Purdue University West Lafayette | Purdue · Agricultural & Biological Engineering

Simple Summary: With rapid technological advances, the use of machine learning in the poultry sector has increased significantly. The estimation of ammonia concentration with machine learning can greatly impact environmental protection as well as human and animal health. In this paper, an innovative hybrid approach combining machine learning with w...

Aquaculture operations generate substantial wastewater containing organic matter, total dissolved solids, emerging contaminants, and uneaten food pellets, leading to significant environmental issues. In this study, electrooxidation (EO) treatment methods using a boron-doped diamond (BDD) electrode was employed to remove soluble chemical oxygen dema...

This study investigates the estimation of daily solar radiation (SR) through various machine learning (ML) models, including the k-nearest neighbor algorithm (KNN), support vector regression (SVR), and random forest (RF), both individually and in combination with the wavelet transform (WT). The assessment of these models is based on meteorological...

In the present study, ultraviolet radiation C (UV-C) was used as a pretreatment tool for the optimal recovery of biofuel precursors from algae Chlorella vulgaris. The pretreatment efficiency of UV-C with fixed light intensity (1.173 mWcm−2) on 1.5 gL-1 algal biomass was observed at 0, 0.5, 1, 2, 5, 10, and 20 h of irradiation by measuring the relea...

Simple Summary The aim of this review is to provide researchers with a guide to simulating the environment of poultry houses using computational fluid dynamics. Through an extensive review of the literature in this area, it provides comprehensive insights into the common challenges encountered when applying this method, as well as a discussion of p...

Aquaculture is a controlled aquatic farming sector and one of the most important human food sources. Fish farming is one of the predominant, fast-growing sectors that supply seafood products worldwide. Along with its benefits, aquaculture practices can discharge large quantities of nutrients into the environment through non-treated or poorly treate...

Sugar crops, including sugar beet and sugarcane, emerged as the potential source of food, feed, and energy sectors. Global increasing sugar demands of the burgeoning population is satisfied by the sugar industry. The large-scale processing of sugar crops releases pollutants into the water system. The wastewater generated by the sugar industry consi...

Traditional manual weighing systems for birds on poultry farms are time-consuming and may compromise animal welfare. Although automatic weighing systems have been introduced as an alternative, they face limitations in accurately estimating the weight of heavy birds. Therefore, exploring alternative methods that offer improved efficiency and precisi...

This research was carried out on 100 soil samples collected from 0-60 cm depths from 100 vineyards in 20 rural settlements in order to determine the general characteristics of the soils where grape production is made in the Alaşehir district of Manisa, which has the largest vineyard areas. With this research, the soil pH, EC, organic matter, textur...

Wastewater is discarded from several sources, including industry, livestock, fertilizer application, and municipal waste. If the disposed of wastewater has not been treated and processed before discharge to the environment, pathogenic microorganisms and toxic chemicals are accumulated in the disposal area and transported into the surface waters. Th...

The isolated bacterial strain (Bacillus brevis strain 1 B) showed a maximum tolerated level of 450 mg L-1 of the selected pesticides namely: imidacloprid, fipronil, cypermethrin, and sulfosulfuron. Within 15 days of the experiment, strain 1 B was able to reduce up to 95% of a pesticide mixture (20 mg L-1) in a carbon-deficient medium (minimal mediu...

Due to the global population growth and economic development, energy demand has increased worldwide. Countries take steps to improve their alternative and renewable energy sources. Algae is one of the alternative energy sources and can be used to produce renewable biofuel. In this study, nondestructive, practical, and rapid image processing techniq...

This study predicted the daily evapotranspiration of eggplant (Solanum melongena L.) under full and deficit irrigation in the Bafra district of Samsun province, Turkey, using machine learning methods. Artificial neural networks (ANNs), deep neural networks (DNN), M5 model tree (M5Tree), random forest (RF), support vector machine (SVM), k-nearest ne...

The electrocoagulation (EC) and electrooxidation (EO) processes are employed widely as treatment processes for industrial, agricultural, and domestic wastewater. In the present study, EC, EO, and a combination of EC + EO were evaluated as methods of removing pollutants from shrimp aquaculture wastewater. Process parameters for electrochemical proce...

Eutrophication is one of the major emerging challenges in aquatic environment. Industrial facilities, including food, textile, leather, and paper, generate a significant amount of wastewater during their manufacturing process. Discharge of nutrient-rich industrial effluent into aquatic systems causes eutrophication, eventually disturbs the aquatic...

The presence of toxic pollutants in wastewater discharge can affect the environment negatively due to presence of the organic and inorganic contaminants. The application of the electrochemical process in wastewater treatment is promising, specifically in treating these harmful pollutants from the aquatic environment. This review focused on recent a...

Reference evapotranspiration (ET0) estimates are commonly used in hydrologic planning for water resources and agricultural applications. Last 2 decades, machine learning (ML) techniques have enabled scientists to develop powerful tools to study ET0 patterns in the ecosystem. This study investigated the feasibility and effectiveness of three ML tech...

Machine learning (ML) models, including artificial neural networks (ANN), generalized neural regression networks (GRNN), and adaptive neuro-fuzzy interface systems (ANFIS), have received considerable attention for their ability to provide accurate predictions in various problem domains. However, these models may produce inconsistent results when so...

Cyanobacteria are a type of bloom-forming phytoplankton that cause environmental problems in aquatic ecosystems worldwide. Cyanobacterial harmful algal blooms (cyanoHAB) often produce cyanotoxins that affect public health by contaminating surface waters and drinking water reservoirs. Conventional drinking water treatment plants are ineffective in t...

Water quality is deteriorating continuously as increasing levels of toxic inorganic and organic contaminants mostly discharging into the aquatic environment. Removal of such pollutants from the water system is an emerging research area. During the past few years use of biodegradable and biocompatible natural additives has attracted considerable att...

Groundwater is a significant source of plant water use since groundwater consumption of plants reduces the volume of surface irrigation water. In this study, groundwater table effect on hard red spring wheat ( Triticum aestivum L.) growth and yield parameters were investigated using a lysimeter technique in a controlled environment. Three different...

Cyanophages are highly abundant specific viruses that infect cyanobacterial cells. In recent years, the cyanophages and cyanobacteria interactions drew attention to environmental restoration due to their discovery in marine and freshwater systems. Cyanobacterial harmful algal blooms (cyanoHABs) are increasing throughout the world and contaminating...

Life on Earth had been continuously evolving for millennia, with living organisms colonizing every suitable ecosystem on the biosphere. Prokaryotes are the apex life form in this evolutionary track that has pushed the boundaries in which life can exist. Microscopic life forms have been thriving under extreme conditions on the planets like high pres...

Life on Earth had been continuously evolving for millennia, with living organisms colonizing every suitable ecosystem on the biosphere. Prokaryotes are the apex life form in this evolutionary track that has pushed the boundaries in which life can exist. Microscopic life forms have been thriving under extreme conditions on the planets like high pres...

Wastewater treatment is an essential process for public health and a sustainable ecosystem. Inadequate wastewater treatment can lead to the release of organic and inorganic pollutants and pathogenic bacteria into the receiving waters which could be further utilized for recreation purposes. The interaction between bacteriophage and bacteria in a was...

This research was carried out on 100 soil samples collected from 0-60 cm depths from 100 vineyards in 20 rural settlements in order to determine the general characteristics of the soils where grape production is made in the Alaşehir district of Manisa, which has the largest vineyard areas. With this research, the soil pH, EC, organic matter, textur...

Cold storage facilities consume a considerable amount of energy, especially in hot climates, which can be decreased using thermal insulators to maintain a stable temperature. The primary aim of this research study was to determine the effect of insulation thickness on the energy efficiency and cost savings of exterior walls for cold storage facilit...

Lettuce is an important vegetable in the human diet and is commonly consumed for salad. It is a source of vitamin A, which plays a vital role in human health. Improvements in lettuce production will be needed to ensure a stable and economically available supply in the future. The influence of nitrogen (N), phosphorus (P), and potassium (K) compound...

The natural and anthropogenic sources of water bodies are contaminated with diverse categories of pollutants such as antibiotics, pharmaceuticals, pesticides, heavy metals, organic compounds, and other industrial chemicals. Depending on the type and the origin of the pollutants, the degree of contamination can be categorized into lower to higher co...

This research was carried out on 100 soil samples collected from 0–60 cm depths from 20 vineyards in rural settlements in order to determine the general characteristics of the soils where grape production is made in Alaşehir district having largest grape producing vineyard areas of Manisa province. With this research, the soil pH, EC, organic matte...

The pollutants can enter water bodies at various point and non-point sources, and wastewater discharge remains a major pathway. Wastewater treatment effectively reduces contaminants, it is expensive and requires an eco-friendly and sustainable alternative approach to reduce treatment costs. Algae have recently emerged as a potentially cost-effectiv...

Isotope techniques are most frequently used when hydrochemical analysis are insufficient to determine the origin and quality of groundwater and reveal seawater intrusion into groundwater along coastlines. In this study, the potential of the multilayer perceptron, adaptive neuro-fuzzy inference system, generalized regression neural networks, radial...

Isotope techniques are most frequently used when hydrochemical analysis are insufficient to determine the origin and quality of groundwater and reveal seawater intrusion into groundwater along coastlines. In this study, the potential of the multilayer perceptron, adaptive neuro-fuzzy inference system, generalized regression neural networks, radial...

Appropriate microclimate conditions in broiler housing are critical for optimizing poultry production and ensuring the health and welfare of the birds. In this study, spatial variabilities of the microclimate in summer and winter seasons in a mechanically ventilated broiler house were modeled using the computational fluid dynamics (CFD) technique....

This study aimed to determine the effect of optimum pipe insulation thickness on energy savings and air pollution under greenhouse conditions. In this regard, an optimization model based on a Life Cycle Cost (LCC) analysis was carried out using the P1–P2 method. Three fuel types, coal, natural gas, and fuel oil, were tested with nominal pipe sizes...

Deep learning (DL) and computer vision applications in precision agriculture have great potential to identify and classify plant and vegetation species. This study presents the applicability of DL modeling with computer vision techniques to analyze the nutrient levels of hydroponically grown four lettuce cultivars (Lactuca sativa L.), namely Black...

Deep learning and computer vision applications in precision agriculture have great potential to identify and classify plant and vegetation species. This study presents the applicability of deep learning modeling with computer vision techniques to analyze nutrient levels of hydroponically grown four lettuce cultivars, namely Black Seed, Flandria, Re...

Algal blooms and associated oxygen depletion have devastating consequences for freshwater ecosystems. Identifying and quantifying microalgae species require highly expensive equipment that is unaffordable to many research units, mostly those in developing countries. The development of a low-cost technique to quantify the microalgae species could re...

Enzymatic pretreatment is emerging as an efficient tool for the extraction of biofuel precursors from algal biomass. However, yardsticks for end-use directed selection of optimal pretreatment conditions are not yet identified. The present study, for the first time, reveals different optimal conditions for algal biomass solubilization and sugar rele...

The analyses of online quality measurements of four lettuce cultivars (Rex, Tacitus, Black Seeded Simpson, Flandria) using hyperspectral image processing techniques have been studied. Seedlings were planted in Rock-wool cubes and fed for 3 weeks using hydroponic nutrient solution containing 0, 50, 100, 150, 200, 250, and 300 ppm nitrogen. The hyper...

In the past few decades, pharmaceuticals have emerged as potential contaminants in wastewater. The level of pharmaceutical contamination varies with the region and type of waste stream. Pharmaceutical wastewater is a mixture of complex structure molecules and their presence can be seen from nanograms to micrograms per liter of the sample. Sometimes...

Recently, microbial desalination cells (MDCs) have been gaining significant attention in the desalination industry. The microbial desalination process can generate electricity and treat wastewater while desalinating simultaneously. The use of microbes in the desalination technology contributes toward cost‐effective and self‐sustainable measures. Th...

Lysimeter experiments were conducted under greenhouse conditions to investigate canola (Brassica napus L.) plant water use, growth, and yield parameters for three different water table depths of 30, 60, and 90 cm. Additionally, control experiments were conducted, and only irrigation was applied to these lysimeters without water table limitations. T...

Microalgae are widely used for wastewater treatment. Microalgae offer several advantages over other microbial culture used in wastewater treatment. Some of these advantages are (i) low-cost cultivation at large scale without external supply of nutrient and carbon, (ii) ability to sequester CO2 from waste gases, and (iii) production of biochemical-r...

Water table contribution to plant water use is a significant element in improving water use efficiency (WUE) for agricultural water management. In this study, lysimeter experiments were conducted in a controlled greenhouse environment to investigate the response of soybean water uptake and growth parameters under four different water table depths (...

Water table contribution to plant water use is a significant element in crop production since it reduces the drainage and irrigation water volume and enhances the crop water uptake from groundwater. In this study, responses of canola (Brassica Napus L.) plant water uptake, crop growth and yield parameters to three constant water table depths of 30,...

Responses of canola plant water uptake, crop growth and yield parameters to 3 constant water table depths (30, 60, and 90 cm) were studied under a controlled environment using lysimeters. One more set of experiments with applying only surface irrigation were conducted as control experiments. A randomized complete block design was used with 8 replic...

Water table contribution to plant water use is a significant element in crop production since it reduces the drainage and irrigation water volume and enhances the crop water uptake from groundwater. In this study, responses of canola (Brassica Napus L.) plant water uptake, crop growth and yield parameters to three constant water table depths of 30,...

As the world population is drastically increasing, industrialization and urbanization are also increasing. Eventually, environmental pollution is increasing, and the amount of arable land is decreasing. Water scarcity is becoming a challenge throughout the world in that nearly half of the world population will experience water shortage. The rate of...

The study object was to assess the performance of three sensors in estimating VWC in laboratory conditions. Three soil moisture sensors (Acclima Inc., TDR-315, Decagon Devices, Inc. 5TE, and Stevens Water Monitoring Systems, Inc. Hydra Probe) were used in soil columns. Testing of the TDR-315 and Hydra Probe sensors showed good agreement between act...

Wastewaters generated from vegetable oil industries contain a high concentration of organic pollutants that are detrimental to the aquatic ecosystem. Electrochemical processes are gaining importance in the treatment of inorganic and resistant organic pollutants in wastewaters. In this study, electrocoagulation (EC) was applied to remove organic pol...

The impact of low solid retention times (SRT) on the biodegradability of wastewater derived dissolved organic nitrogen (DON) was studied using a continuous stirred tank reactor (CSTR). Laboratory scale experiments were conducted at different low SRTs (0.2, 0.4, 0.5, 1 and 2 d) using mixed culture bacteria and a pure strain algae Chlamydomonas reinh...

Abstract Turkish varieties of seedless grapes and raisins are among the most sought-after varieties in domestic and international markets. The present study determined the influences of the four different tillage practices; mulching, chisel tillage, plow tillage and conventional tillage under organic. The experiment was distributed using complete r...

Microalgal bioremediation of CO2, nutrients, endocrine disruptors, hydrocarbons, pesticides, and cyanide compounds have evaluated comprehensively. Microalgal mitigation of nutrients originated from municipal wastewaters, surface waters, and livestock wastewaters has shown great applicability. Algal utilization on secondary and tertiary treatment pr...

Effects of operational changes on membrane fouling were evaluated for a wastewater reclamation facility. The focuses were on addition of a coagulant (ferric chloride) versus no addition and an accidental high chlorine (sodium hypochlorite) dose. Two membrane modules with different service ages, 3 years versus 9 months, were compared. Fouling rates...

Effluent dissolved organic nitrogen (DON) is problematic in nutrient sensitive surface waters and needs to be reduced to meet demanding total dissolved nitrogen discharge limits. Bioavailable DON (ABDON) is a portion of DON utilized by algae or algae + bacteria, while biodegradable DON (BDON) is a portion of DON decomposable by bacteria. ABDON and...

Nitrogen is an essential nutrient for greenhouse-grown lettuce (Lactuca sativa L.); however, excessive nutrient availability causes disease and detrimental effects on the leaf and root development. In this study, nitrogen content of the lettuce leaves was estimated by determining the chlorophyll concentrations of the leaves using image processing t...

Wastewater derived dissolved organic nitrogen (DON) is typically constitute of the majority of total dissolved nitrogen (TDN) discharged to surface waters from advanced wastewater treatment plants (WWTP). When consider the stringent regulations on nitrogen discharge limits in sensitive receiving waters, DON becomes problematic and needs to be reduc...

Dissolved organic nitrogen (DON) and its biodegradability in treated wastewater have recently gained attention due to increased regulatory requirements on effluent quality to protect receiving waters. Laboratory scale chemostat experiments were conducted at 9 different solids retention times (SRTs) (0.3, 0.7, 2, 3, 4, 5, 7, 8, and 13 days) to exami...

Drought is a natural hazard, and significantly affects agriculture production. The impact of drought on crop yield is a global issue, and well recognized. This study seeks to assess the impact of drought on corn yield in North Dakota, USA. Corn production is an important part of North Dakota’s economy, and corn acreage has been increasing in the st...

Abstract The removal of cyanide (CN(-)) from aqueous solutions using a strongly basic ion-exchange resin, Purolite A-250, was investigated. The effects of contact time, initial CN(-) concentration, pH, temperature, resin dosage, agitation speed, and particle size distribution on the removal of CN(-) were examined. The adsorption equilibrium data fi...

Turkey is one of the most important seedless raisin producers in the world market. Approximately, 82% of the seedless raisin has been produced in the western part of Turkey since the climate (semi-arid) of this region is very appropriate to grow seedless grape. More specifically, the Plain of Alasehir, located in the Gediz Basin in Aegean Region ha...