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Industrial noise level study in a wheat processing factory in Ilorin, Nigeria

Ibrahim I., Ajao K. R., Aremu S. A.

International Journal of Applied Mechanics and Engineering

2016

Vol. 21, no. 2

511--523

An industrial process such as wheat processing generates significant noise which can cause adverse effects on workers and the general public. This study assessed the noise level at a wheat processing mill in Ilorin, Nigeria. A portable digital sound level meter HD600 manufactured by Extech Inc., USA was used to determine the noise level around various machines, sections and offices in the factory at pre-determined distances. Subjective assessment was also mode using a World Health Organization (WHO) standard questionnaire to obtain information regarding noise ratings, effect of noise on personnel and noise preventive measures. The result of the study shows that the highest noise of 99.4 dBA was recorded at a pressure blower when compared to other machines. WHO Class-4 hearing protector is recommended for workers on the shop floor and room acoustics should be upgraded to absorb some sounds transmitted to offices.

Treatment of textile waste water using H2O2/UV system

Amin H., Amer A., El Fecky A., Ibrahim I.

Physicochemical Problems of Mineral Processing

2008

Vol. 42

17-28

Treatment of textile wastewater with the Advanced Oxidation Process (AOP) is based on using the H2O2/UV system. The optimum condition for treatment of an effluent sample was determined by experimenting on a synthetic dye solution prepared using the blue sulfur dye. Different parameters that affect the reaction rate were tested (UV intensity of 18, 36 and 54 W, initial dye concentration of 70, 80, 90 and 100 ppm, pH 3, original pH of the solution equal to 7.29 and 10 as well as the catalyst dose). Absorbance was measured to determine the decolorization efficiency and then the total organic carbon was measured for the reactions at optimal conditions to assure that decolorization is accompanied by degradation.

Przeróbka wód odpadowych przemysłu farbiarskiego metodą Advanced Oxidation Process (AOP) jest oparta na układzie H2O2/UV. Określono eksperymentalnie optymalne warunki przerobu odcieków dla syntetycznego barwnika blue sulfur. Badano parametry które wpływają na szybkość reakcji (intensywność UV na poziomie 18, 36 oraz 54 W, początkowe stęSenie barwnika 70, 80, 90 oraz 100 ppm, pH 3 oraz naturalne wynoszące od 7.29 do 10, jak równieS ilość katalizatora). Mierzono absorbancję dla określenia wydajności odbarwiania orz całkowitą ilość węgla organicznego dla optymalnych warunków reakcji zapewniających rozpadu barwnika w trakcie jego dekoloryzacji.