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首页> 外文期刊>International Journal of Environment and Bioenergy >Qualities of Effluents from Three Cocoa Processing Factories in Ondo State, Southwest Nigeria
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Qualities of Effluents from Three Cocoa Processing Factories in Ondo State, Southwest Nigeria

机译：尼日利亚西南部翁多州三个可可加工工厂的出水质量

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Industrial pollution has been and will continue to be a major factor causing the degradation of the environment around us, affecting the land we live on, the water we use and the air we breathe. Effluents from three cocoa processing factories (A, B and C) in Ondo State, Nigeria were analyzed for physicochemical properties, heavy metals and microbial load. The temperature ranged between 28.800C and 29.400C. The pH values of the effluents ranged between 6.00 and 6.60. Conductivity of the effluents ranged between 480 and 660μs/cm. The total dissolved solids (TDS) values in the waste water ranged from 198mg/L for factory B, 220mg/L for factory A and 320mg/L for factory C while the total suspended solids (TSS) values ranged from 18.60 to 30.20mg/L. Turbidity of the effluents ranged between 12.2 and 15.50 NTU with C having the highest value. Total hardness of the effluents ranged between 142.00 and 185.00 mg/LCaCO_3. Dissolved oxygen levels in the effluents ranged 2.50mg/L and 3.50mg/L. The biological oxygen demand (BOD_5) of the effluents were 26.20mg/L, 20.50mg/L and 18.80mg/L for factories A, B and C, these values fall within Federal Ministry of Environment (FME) effluent limit of 50 mg/L for discharges into inland surface water. Oil and grease was not detected in the effluents. Chemical Oxygen Demand (COD) of the effluents ranged between 58.40 and 75.60 mg/L. Phosphate level in the effluents ranged between 3.60 and 5.00mg/L while nitrate ranged from 14.40- 20.20 mg/L. The mean concentration values of heavy metals ranged for Cu (0.15-0.25)mg/L, Zn (0.02- 0.10)mg/L, Mn (0.05-0.10)mg/L and Fe (0.66-1.20) mg/L. Pb and Cd were not detected. The total bacteria load was too numerous to count (TNTC) cfu/mL while the total Coliform count was 05 mpn/100mL for A, 03 mpn/100mL for B and 08 mpn/100mL for C respectively for the factories. Results were within the federal ministry of environment (FME) limits for effluent.
机译：工业污染一直并将继续成为导致我们周围环境退化，影响我们赖以生存的土地，我们使用的水和我们呼吸的空气的主要因素。分析了尼日利亚翁多州三个可可加工工厂（A，B和C）的废水的理化性质，重金属和微生物负荷。温度在28.800℃至29.400℃之间。废水的pH值范围为6.00至6.60。废水的电导率介于480和660μs/ cm之间。废水中的总溶解固体（TDS）值范围为B工厂198mg / L，A工厂220mg / L和C工厂320mg / L，而总悬浮固体（TSS）值在18.60至30.20mg / L之间。 L.废水的浊度在12.2至15.50 NTU之间，其中C的值为最高。流出物的总硬度在142.00和185.00 mg / LCaCO_3之间。废水中的溶解氧水平为2.50mg / L和3.50mg / L。 A，B和C工厂​​的废水生物需氧量（BOD_5）分别为26.20mg / L，20.50mg / L和18.80mg / L，这些值均在联邦环境部（FME）废水限值50 mg / L用于排入内陆地表水。在废水中未检测到油脂。废水的化学需氧量（COD）在58.40至75.60 mg / L之间。废水中的磷酸盐水平范围为3.60至5.00mg / L，而硝酸盐范围为14.40-20.20 mg / L。重金属的平均浓度范围为Cu（0.15-0.25）mg / L，Zn（0.02-0.10）mg / L，Mn（0.05-0.10）mg / L和Fe（0.66-1.20）mg / L。未检测到铅和镉。工厂的总细菌量太多，无法计数（TNTC）cfu / mL，而工厂的大肠菌群总数分别为05 mpn / 100mL，B的03 mpn / 100mL和C的08 mpn / 100mL。结果在联邦环境部（FME）废水排放限制内。

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