http://repositsc.nuczu.edu.ua/handle/123456789/6398 Sat, 23 May 2026 10:46:57 GMT 2026-05-23T10:46:57Z http://repositsc.nuczu.edu.ua/handle/123456789/7427 Title: INVESTIGATION OF CHEMICAL COMPOSITION AND NUTRITIONAL VALUES OF PULP AND PAPER MILL SLUDGE COMPOST Authors: Nafees Muhammad, Shams Ali Baig; Saiqa Zahid Abstract: Pulp and paper industry generates million tons of wastes annually and become one of the major environmental problems worldwide. In recent years, the nutritional values of pulp and paper mill sludge compost attract researchers’ attentions. Present study was conducted on paper mill based on used paper. In the present study, distribution trend of the chemical composition and nutritional values of sludge generated from the pulp and paper industry was assessed during composting under different environmental conditions. Aim of the study was to utilize paper mill sludge in environment friendly manner. Standard extraction and analytical methods were employed to test the samples for different parameters including total nitrogen, organic carbon, Electrical Conductivity (EC), pH, phosphate, sulfate, sodium, potassium and four micro-nutrients (Zinc, Copper, Nickel and Chromium). Results demonstrated that many parameters significantly varied during composting and efficiently enhanced the nutritional contents of the compost. The concentration of organic carbon before composting was 8.25 % as compared to the composted sample (> 26 %). An increasing trend of total nitrogen content in the compost was also observed, which revealed the outcome of the ammonification process during composting. In addition, micro-nutrients levels were found in increasing pattern to further improve the nutritional values of the compost. Findings from this study suggested that the nutritional values of sludge significantly improved after amended composting, which could be one of the promising sources of nutrients for enhanced agricultural productivity. Also, the composting process greatly reduced the pathogens in sludge and helps to recycle the important nutrients for enhanced agriculture productivity. It is therefore recommended to use waste of paper mill waste as a rich source of macro and micro nutrients. Mon, 01 Oct 2018 00:00:00 GMT http://repositsc.nuczu.edu.ua/handle/123456789/7427 2018-10-01T00:00:00Z http://repositsc.nuczu.edu.ua/handle/123456789/7421 Title: ДОСЛІДЖЕННЯ ОСОБЛИВОСТЕЙ ЗАСТОСУВАННЯ ВОДОПОВІТРЯНИХ ЕЖЕКТОРІВ ДЛЯ ЗНИЖЕННЯ ПИЛОУТВОРЕННЯ ПРИ ТРАНСПОРТУВАННІ ГІРНИЧОЇ МАСИ НА КАР’ЄРАХ Authors: В. Є. Колесник, А. В. Павличенко; О. О. Борисовська, М. О. Бояркин Abstract: Проаналізовано джерела пилоутворення на кар’єрах та визначено ефективність способів пилопригнічення на гірничих підприємствах. Досліджено стан вирішення проблеми зниження пилових викидів на гірничому устаткуванні в кар’єрах з переробки рудних й нерудних матеріалів. Встановлено, що у вузлах стиковки устаткування утворюється дрібнодисперсний пил, який слабо взаємодіє з достатньо крупними краплями типових гідро-зрошувачів. Ступінь захоплення пилових частинок краплями води визначена шляхом спільного рішення рівняння нерозривності потоку і рівняння руху частинки в системі координат, пов'язаній з обтічної краплею. Обґрунтовано метод та засіб зниження пилових викидів в атмосферу, що надходять з вузлів гірничого устаткування переробних комплексів гірничої маси в кар’єрах. Метод базується на застосуванні водоповітряного ежектора – гідро-зрошувача з високоефективним використанням розпиленої води. Режим роботи водоповітряного ежектора обирали залежно від характерних концентрацій і розмірів частинок пилу, що впливають на потрібну далекобійність факелу розпилу та витрати води. При тиску 0,2 МПа, дальність польоту крапель складає 1,5…2,5 м, а витрата води становить 0,8…1,6 дм3/хв. На широких конвеєрах та крупних перевантажувальних вузлах гірничого устаткування доцільно паралельно розміщувати два водоповітряних ежектора. Ефективність пригнічення пилу в зоні дії факела водоповітряного ежектора складає близько 95…98 %. Зниження загального викиду пилу в атмосферу з відкритого стикового вузла бункера з конвеєром очікується на рівні 75…85 %. Наведено результати лабораторних досліджень основних параметрів експериментального зразка водоповітряного ежектора та комбінованої гідро-форсунки, що пропонується для використання в повітряно-охоронній діяльності гірничих підприємства. Застосування водоповітряних ежекторів дозволить зменшити викиди пилу в атмосферу та його поширення за межі санітарно-захисної зони кар’єру. Mon, 01 Oct 2018 00:00:00 GMT http://repositsc.nuczu.edu.ua/handle/123456789/7421 2018-10-01T00:00:00Z http://repositsc.nuczu.edu.ua/handle/123456789/7402 Title: DEVELOPMENT OF MATHEMATICAL MODEL OF INFILTRATION OF IRON SULFATE ACID SOLUTION Authors: Barsukova, G. Abstract: The chemical industry is the leader, which is characterized by significant volumes of production and multiplicity of waste. The accumulation of a large amount of waste negatively affects the environment. The most obvious example is the state of the soils, where there are enterprises producing pigmentary titanium dioxide. The purpose of the work is to study the processes of penetration and accumulation of acidic solutions from chemical industry wastes into the soil and development of mathematical model of infiltration of iron sulfate acid solution. The study of the infiltration of solutions of sulfuric acid was carried out on the example of gray soil, since this type dominates in the area of the inkstone dump. Soil infiltration is estimated by the coefficient of filtration, which is determined by Darcy's law. The diffusion density was determined experimentally – 1.6310-10 kg/m2, and the diffusion coefficient was calculated – 1.5110-8 m2/s. On the basis of experimental research, an effective mathematical model for the propagation of acid solutions of iron sulfate in soil was developmented. By numerical modeling of the developed model, the acidity distribution in the 3D projection is obtained. At the initial stage, there is no water movement in dry soil. However, in the presence of slight convection, an increase in the acidity of the soil occurs. Soil oxidation occurs faster and its leveling is observed at different depths. Comparison of the results of numerical simulation and statistical data obtained experimentally shows the relationship between the hydrolytic acidity of the soil environment and the depth of impregnation of acid solutions of ferrous sulfate. It is established that between the values obtained by the experimental method and the results of the solution of the mathematical model, there is a close correlation connection. The correlation coefficient was 0.89. Mon, 01 Oct 2018 00:00:00 GMT http://repositsc.nuczu.edu.ua/handle/123456789/7402 2018-10-01T00:00:00Z http://repositsc.nuczu.edu.ua/handle/123456789/7358 Title: NUTRIENT DISPERSION MODELING OF COAL OVERBURDEN DUMPS FOR RECLAMATION AND SUSTAINABLE MANAGEMENT Authors: M. Sundararajan, V. Vambol; S. Vambol, N. Kumari; I. Ansari Abstract: This study presents an innovative approach for the effective reclamation and management of coal overburden dumps. The study reveals that the existing and liberated nutrients due to natural phenomena are washed away by the run-off in the form of leachate during resting period of 5 years. The concentration of organic matters and organic carbon are also decreasing and as the result of these phenomena, the electric conductivity also decreases. The nutrients on the top layer starts increasing during 6th years while nutrient amendment was done just before plantation by means of bio-degradable manures on the top-soil amended on the dump materials for reclamation purpose. After plantation, it has been observed that the nutrient loss on the top-layer is very less due to plantation as the roots control the soil erosion. However, there is no significant improvement in the nutrient refilling the dump as the leaves fall is not much. The nutrient status of the dump after plantation has been studied for different ages 6…10, 11…15, 16…30 years using the predictive model and the probable reasons have been well discussed. The study concludes that there are no soil amendments after 10 years but the plants are found to be capable to significantly refill the nutrients as there is a huge quantity of leaf-drops from the planted trees and become compost after going through the process of decaying to serve the plants. In this way, the plants survive without requirements of nutrient amendments meeting its nutrients themselves and such a capability of self-satisfying characteristics of plants through nutrient transaction between soil and plants go on as a cyclic phenomenon through the natural process due to recurrent seasonal changes. As a result of the combined effect of penetrated plant roots in all the directions across the soil and dump materials and the increased organic matter decreases the bulk density and increases the water holding capacity Sat, 01 Sep 2018 00:00:00 GMT http://repositsc.nuczu.edu.ua/handle/123456789/7358 2018-09-01T00:00:00Z