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首页> 外文期刊>Journal of Hazardous Materials >Effects of adsorbents and copper(Ⅱ) on activated sludge microorganisms and sequencing batch reactor treatment process
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Effects of adsorbents and copper(Ⅱ) on activated sludge microorganisms and sequencing batch reactor treatment process

机译：吸附剂和铜（Ⅱ）对活性污泥微生物的影响及分批反应器处理工艺

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Wastewater treatment systems employing simultaneous adsorption and biodegradation processes have proven to be effective in treating toxic pollutants present in industrial wastewater. The objective of this study is to evaluate the effect of Cu(Ⅱ) and the efficacy of the powdered activated carbon (PAC) and activated rice husk (ARH) in reducing the toxic effect of Cu(Ⅱ) on the activated sludge microorganisms. The ARH was prepared by treatment with concentrated nitric acid for 15 h at 60-65℃. The sequencing batch reactor (SBR) systems were operated with FILL, REACT, SETTLE, DRAW and IDLE modes in the ratio of 0.5:3.5:1:0.75:0.25 for a cycle time of 6h. The Cu(Ⅱ) and COD removal efficiency were 90 and 85%, respectively, in the SBR system containing 10 mg/l Cu(Ⅱ) with the addition of 143 mg/l PAC or 1.0 g PAC per cycle. In the case of 715 mg/l ARH or 5.0 g ARH per cycle addition, the Cu(Ⅱ) and COD removal efficiency were 85 and 92%, respectively. ARH can be used as an alternate adsorbent to PAC in the simultaneous adsorption and biodegradation wastewater treatment process for the removal of Cu(Ⅱ). The specific oxygen uptake rate (SOUR) and kinetic studies show that the addition of PAC and ARH reduce the toxic effect of Cu(Ⅱ) on the activated sludge microorganisms.
机译：已证明采用同时吸附和生物降解过程的废水处理系统可有效处理工业废水中存在的有毒污染物。这项研究的目的是评估铜（Ⅱ）的作用以及粉状活性炭（PAC）和稻壳（ARH）在减少铜（Ⅱ）对活性污泥微生物的毒性作用方面的功效。通过在60-65℃下用浓硝酸处理15小时来制备ARH。顺序批处理反应器（SBR）系统以FILL，REACT，SETTLE，DRAW和IDLE模式以0.5：3.5：1：0.75：0.25的比例运行，循环时间为6小时。在含有10 mg / l Cu（Ⅱ）的SBR系统中，每循环添加143 mg / l PAC或1.0 g PAC，Cu（Ⅱ）和COD去除效率分别为90％和85％。在每个循环添加715 mg / l ARH或5.0 g ARH的情况下，Cu（Ⅱ）和COD去除效率分别为85％和92％。在同时吸附和生物降解废水处理过程中，ARH可作为PAC的替代吸附剂，用于去除Cu（Ⅱ）。比吸收率和动力学研究表明，PAC和ARH的加入降低了Cu（Ⅱ）对活性污泥微生物的毒性作用。

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