不同盐度条件下葡萄糖对余氯等水质的影响
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摘要
[目的]研究葡萄糖在不同盐度条件下对余氯的去除效果,水体中微生物的生长衰亡对水体中三氮的影响,以及余氯对水体pH的影响。[方法]在4个盐度梯度(0、10、20、30)条件下设置相同浓度的葡萄糖,研究葡萄糖对水中总余氯的去除效果,同时计算各个盐度7 d内的水体水质指标。[结果]在30 h时盐度为30的水体中总余氯浓度最先降至0,与其他3组显著差异(P<0.05)。盐度为0时,弧菌无法生长。4个不同盐度梯度下的总菌数目24 h后均不同程度的增长,此后细菌数量开始减少衰亡,4组之间差异显著(P<0.05)。在7个时间点内盐度为0的水体pH比其他3个盐度梯度的pH均高,盐度0与另外3组差异显著(P<0.05)。在7个时间内4个盐度梯度的氨氮先缓慢升高然后上升速度逐渐变快,最后快速下降。在7个时间内硝酸盐变化趋向于平缓,波动不大,4组之间差异不显著(P>0.05)。4个盐度梯度的亚硝酸盐含量在0～72 h出现微小波动,但72 h后开始略有升高且在升高后保持稳定。[结论]在消毒水体中加入葡萄糖作为中和余氯的碳源,不同盐度对葡萄糖中和余氯的效率有影响,盐度越高,中和效率越高,且水体中的三氮随着水体中细菌数量的增长衰亡呈现规律变化。
[Objective] To study the effect of glucose on the removal of residual chlorine under different salinity conditions, the effect of the growth and decline of microorganisms in water on the trinitrogen in water, and the effect of residual chlorine on the pH of water. [Method] Removal test of total residual chlorine was conducted by the same concentration of glucose under the different salinities of 30, 20, 10 and 0 respectively, and the water quality index for each salinity was calculated for 7 days. [Result] The total residual chlorine concentration in the water with a salinity of 30 was first reduced to 0 at 30 h, and there was a significant difference between the other three groups(P<0.05). At a salinity of 0, vibrio does not grow. The number of total bacteria under four different salinity gradients increased with different degrees after 0 h to 24 h, and the bacteria began to decline after a while. The difference between the four groups was significant(P< 0.05). The pH of the water body under the condition of salinity of 0 was higher than that of the other 3 salinity gradients at 7 time points, and the salinity of 0 was significant for the other 3 groups(P<0.05). The trend of ammonia nitrogen in the four salinity gradients in seven periods was slowly increased and then the ascending rate gradually increased and finally fell rapidly. The trend of nitrate change tended to be gentle and fluctuated little in 7 periods, and the difference among the four groups was not significant(P>0.05). The nitrite content of the 4 salinity gradients fluctuated slightly during the period from 0 h to 72 h in the early stage of the experiment, but it slightly increased after 72 h in the later stage of the experiment and remained stable after the increase. [Conclusion ] Glucose was added to the disinfectant water as a carbon source for neutralizing residual chlorine. Different salinities had an effect on the efficiency of glucose neutralization of residual chlorine. The higher the salinity and the higher the neutralization efficiency, and the trinitrogen in the water changed regularly with the growth and declined of the number of bacteria in the water.
[Objective] To study the effect of glucose on the removal of residual chlorine under different salinity conditions, the effect of the growth and decline of microorganisms in water on the trinitrogen in water, and the effect of residual chlorine on the pH of water. [Method] Removal test of total residual chlorine was conducted by the same concentration of glucose under the different salinities of 30, 20, 10 and 0 respectively, and the water quality index for each salinity was calculated for 7 days. [Result] The total residual chlorine concentration in the water with a salinity of 30 was first reduced to 0 at 30 h, and there was a significant difference between the other three groups(P<0.05). At a salinity of 0, vibrio does not grow. The number of total bacteria under four different salinity gradients increased with different degrees after 0 h to 24 h, and the bacteria began to decline after a while. The difference between the four groups was significant(P< 0.05). The pH of the water body under the condition of salinity of 0 was higher than that of the other 3 salinity gradients at 7 time points, and the salinity of 0 was significant for the other 3 groups(P<0.05). The trend of ammonia nitrogen in the four salinity gradients in seven periods was slowly increased and then the ascending rate gradually increased and finally fell rapidly. The trend of nitrate change tended to be gentle and fluctuated little in 7 periods, and the difference among the four groups was not significant(P>0.05). The nitrite content of the 4 salinity gradients fluctuated slightly during the period from 0 h to 72 h in the early stage of the experiment, but it slightly increased after 72 h in the later stage of the experiment and remained stable after the increase. [Conclusion ] Glucose was added to the disinfectant water as a carbon source for neutralizing residual chlorine. Different salinities had an effect on the efficiency of glucose neutralization of residual chlorine. The higher the salinity and the higher the neutralization efficiency, and the trinitrogen in the water changed regularly with the growth and declined of the number of bacteria in the water.
引文
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[12] 李玲玲.高盐度废水生物处理特性研究[D].青岛:中国海洋大学,2006.
[13] 吴礼龙,邓昉.常用含氯消毒剂有哪些[J].北方牧业,2003(9):23.
[14] 郝西鹏,张群正,阳飞,等.水中三种无机氮转化关系探究[J].广州化工,2015,43(3):108-110.
[15] 姚秀清,张全,王庆庆.硝化细菌对养殖水体处理技术的研究[J].化学与生物工程,2011,28(1):79-81.
[16] 黄辨非,张敏,夏良鹏,等.施用漂白粉对池塘理化性质及底栖动物的影响[J].湖北农学院学报,2002,22(1):27-29.
[2] 延克军,李卫平,邢姝萍,等.游泳池消毒杀菌的运行与管理[J].给水排水,2003,29(5):67-69.
[3] 李林新,郭建军,龙福生.污水处理后的余氯治理[J].环境保护,1991(11):17,7.
[4] 雷衍之.养殖水环境化学(水产养殖专业用)[M].北京:中国农业出版社,2004.
[5] 黄承武.医院污水的余氯[J].环境保护,1984(10):11,32.
[6] 谢文平,朱新平,郑光明,等.广东罗非鱼养殖区水体及鱼体中多环芳烃的含量与健康风险[J].农业环境科学学报,2014,33(12):2450-2456.
[7] 张怀旭,刘婉冬,李冰璟,等.活性炭去除水中余氯的研究[J].环境污染与防治,2008,30(5):63-68.
[8] 周建斌,邓丛静,程金波,等.竹炭对水中余氯吸附性能的研究[J].世界竹藤通讯,2008,6(1):15-19.
[9] 雷衍之.养殖水环境化学实验[M].北京:中国农业出版社,2006.
[10] 宋怀龙.含氯消毒剂及其在水产养殖中应用的利弊:兼建立和重新定义相关概念[J].中国水产,1997(5):30-31.
[11] WONG G T F,DAVIDSON J A.The fate of chlorine in sea-water[J].Water research,1977,11(11):971-978.
[12] 李玲玲.高盐度废水生物处理特性研究[D].青岛:中国海洋大学,2006.
[13] 吴礼龙,邓昉.常用含氯消毒剂有哪些[J].北方牧业,2003(9):23.
[14] 郝西鹏,张群正,阳飞,等.水中三种无机氮转化关系探究[J].广州化工,2015,43(3):108-110.
[15] 姚秀清,张全,王庆庆.硝化细菌对养殖水体处理技术的研究[J].化学与生物工程,2011,28(1):79-81.
[16] 黄辨非,张敏,夏良鹏,等.施用漂白粉对池塘理化性质及底栖动物的影响[J].湖北农学院学报,2002,22(1):27-29.