The Appropriate Biochemical Oxygen Demand Concentration for Designing Domestic Wastewater Treatment Plant
The Appropriate Biochemical Oxygen Demand Concentration for Designing Domestic Wastewater Treatment Plant
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生活污水处理厂设计适宜的生化需氧浓度
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通讯作者：
K. Chunkao
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作者：
T. Jinjaruk;P. Maskulrath;Charintip Choeihom;K. Chunkao
泰国大多数污水处理厂都面临着设计过度的问题，因为这是基于输入废水的生化需氧量（BOD）含量浓度低于设计系统的效率。为了达到本研究的目的，发现最佳推荐BOD浓度对处理效果和高运行成本的影响。2009年1月至2017年12月采集水样（N = 90）。结果表明，BOD浓度差异随着时间的推移呈现不一致的变化，这是由于各种活动产生的废水来源范围广泛。本文的研究结果表明，城市附近的污水处理厂推荐的BOD浓度为80 mg/L，而超过5小时进入远离城市的污水处理厂系统的推荐浓度为60 mg/L，因为废水通过封闭管道的转移过程导致厌氧处理，降低了BOD浓度。因此，总体概念表明，进入污水处理厂的BOD浓度分别为80和60 mg/L，在80%的置信范围内。
Majority of Wastewater treatment plants in Thailand faces the problem of over design, as this is based on the Biochemical Oxygen Demand (BOD) content of the inputted wastewater having a lower concentration than the efficiency of the design system. To meet the purpose of this study the findings of the optimum recommended BOD concentration for the effectiveness of the treatment and high operating costs. Water samples were collected from January 2009 to December 2017 (N = 90). The results showed that the BOD concentration differ shows an inconsistence variation over time as this is due to the wide range of wastewater sources from various activities. The results of this paper showed that the recommended BOD concentration for the wastewater treatment plant should be 80 mg/L in the vicinity of the city, while 60 mg/L is the recommended concentration for wastewater that has been transited for over 5 hours into the treatment plant system away from the city, as the transferring processes of the wastewater through the close pipeline resulted in an anaerobic treatment which reduces the BOD concentration. Thus, the overall concepts suggested that the BOD concentration entering the wastewater treatment plant of 80 and 60 mg/L respectively falls under the 80% confident range.