Effects of metal pollution in the monosodium glutamate production effluent on full exploitation and biological treatment |
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Authors: | Shupei Cheng Yibin Cui Shurong Ding Lemei Dai |
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Institution: | Department of Environmental Sciences and Engineering and The Center of Analysis and Measurement , Nanjing University , Nanjing, 210093, P. R. China |
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Abstract: | Monosodium glutamate (MSG) effluent was sampled from three MSG mills and 21 metal elements were measured with a inductively coupled plasma (ICP) Spectrometer. The total metal concentration of each MSG wastewater sample was 19192, 3190 and 3161 mg/L respectively. Compared with the water quality standard issued by the Chinese Government and the World Health Organization (WHO), some values were found to exceed the standards. The 24hr‐LC50, 48hr‐LC50, 72hr‐LC50 and 96hr‐LC50 to the fish Ctenopharyngodon idellus were 6.9%, 3.2%, 2.5% and 1.4% MSG wastewater individually. The specific growth rate for photosynthetic bacteria (PSB) Rhodopseudomonas sphaeroides was inhibited by the metals in MSG wastewater. Therefor the MSG wastewater should not be discharged into drinking, irrigation and fishery water systems, moreover it cannot be treated by general biological processes efficiently. How to develop an effective biotechnique for the utilization of organic pollutants in MSG effluent will also be discussed in this paper. |
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Keywords: | Heavy metals glutamate effluent biological treatment |
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