RAW WATER QUALITY ANALYSIS TO DISCOVER THE CAUSE OF PIPELINE SCALLING PROBLEM IN PT. X (ICE PRODUCTION COMPANY)

K. Harmayani, G. A. W. Sudiartha, I. Suyasa
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Abstract

PT. X is one of the ice companies in which its largest company is located in Bali, more precisely in the Pidada area, North Denpasar. Based on field observations the area is an area that has a calcareous soil structure. The water source of PT. X was extracted from the groundwater. From the field observation, it was found that the pipeline network, that connected the inlet water to water treatment system and ice production units, was severely covered by faint white scale. In order to discover the origin of this scale, water quality testing need to be carried out.  From the results, it was found that the total hardness in the inlet water, taken from the groundwater tap, was 162.85 mg/l with calcium concentration of 2.15 mg/l and iron 3.83 mg/l. Water quality testing was also carried out in the water treatment unit consisting of resin softener where the total hardness surprisingly increased into 279.81 mg/l, calcium concentration was 2.96 mg/l, iron concentration was 0.55 mg/l. Even after being treated in softener resin, the total hardness increased sharply to 483 mg/l, which categorized as extreme hardness. The increase in total hardness indicates that there was a failure in the operation of the water treatment system, even it also contributed to the higher hardness and calcium concentration. This over-year’s treatment failure has been causing accumulation of hardness and calcium concentration in the compartment of both water treatment system and ice production unit that inflicts a higher hardness level in the effluent.
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原水水质分析发现x厂(制冰公司)管道结垢问题的原因
PT. X是一家冰公司,其最大的公司位于巴厘岛,更准确地说,位于北登巴萨的Pidada地区。根据野外观察,该地区是一个钙质土壤结构的地区。PT. X的水源取自地下水。从现场观察发现,连接进水到水处理系统和制冰机组的管网被微弱的白色水垢严重覆盖。为了发现这种水垢的来源,需要进行水质检测。结果表明,地下水进水总硬度为162.85 mg/l,钙浓度为2.15 mg/l,铁浓度为3.83 mg/l。由树脂软化剂组成的水处理单元也进行了水质检测,总硬度惊人地提高到279.81 mg/l,钙浓度为2.96 mg/l,铁浓度为0.55 mg/l。即使在软化剂树脂处理后,总硬度也急剧上升至483 mg/l,属于极端硬度。总硬度的升高说明水处理系统的运行出现了故障,即使这也导致了硬度和钙浓度的升高。这一年的处理失败导致水处理系统和制冰装置的隔室中硬度和钙浓度的积累,从而导致出水硬度更高。
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