天津市郊区部分水体水质BOD和COD分析

为了解天津市津静路附近池塘水与排污井的水质,对其附近的5个地上水体和5个排污井进行了水质BOD和COD分析。结果显示:地上供试水体的BOD值是校外排污河>城建后池塘>农学院荷花池和城建荷花池>农学院砚池,其中,校外排污河和城建后池塘的水体BOD值明显高于其他3个水体,城建后池塘水的BOD值是其余两个池塘的2倍以上。校外排污河与城建后池塘水的BOD值均未达到国家地表水最低水质要求,农学院荷花池水的BOD值达V类水标准,城建荷花池水达IV类水标准,农学院砚池水达II类水标准。供试水体中的COD值为城建后池塘>校外排污河>农学院砚池、城建荷花池、农学院荷花池。城建后池塘的COD值最高,甚至高于排污河,说明该水体化学污染严重,远远超过国家地表水环境质量标准。其他3个水体的COD值达到国家地表水环境质量IV类地表水标准。而排污井水的BOD值从高到低依次是校内4号公寓>校内浴池>校外公寓>校内7号公寓>主楼,BOD值为132～1 370 mg/L。排污井水的COD值从高到低依次为校内4号公寓>校内7号公寓和校内浴池>主楼和校外公寓,COD值为432～1 483 mg/L。根据国家污水排放水质标准,各测试点的污水均不能直接排放。

Water Quality Analysis(BOD/COD)for Different Water Bodies in Tianjin

In order to understand the quality of water in the pond and sewage wells around Jinjing Road in Tianjin, the quality of water was analyzed including BOD and COD which was taken from 5 ponds and 5 sewage wells nearby. The results show that the BOD values in the 5 ponds were the sewage river beside the road （SRR） 〉 the pond behind University of Tianjin Urban Construction （PUTUC） 〉 the Lily pond in Tianjin Agricultural University （LPTAU） 〉 the Lily pond in University of Tianjin Urban Construction（LPUTUC） 〉 the Inkstone Pool in Tianjin Agricultural University（IPTAU）. Among them, the sewage river beside the road＇s and the pond behind University of Tianjin Urban Construction＇s were obviously higher than the other three, and in the pond water, the pond behind University of Tianjin Urban Construction was the highest which was over twice as much as others. Both of them overrun the lowest request （under V standards） , LPTAU, LPUTUC and IPTAU were under the IV, III, and I, respectively according to the criterion of national surface water in China. The COD values in the 5 ponds were PUTUC 〉 SRR 〉 IPTAU 〉 LPUTUC 〉 LPTAU. The COD values in PUTUC was the highest, which was higher than that in SRR and even much higher than the national surface water environment quality criterion. The water quality of other three ponds complied with the IV standards. The BOD values in the 5 sewage wells around Tianjin Agricultural University were beside the No. 4 apartment of school （4AS） 〉 beside the bathroom in school （BS） 〉 the apartment outside school （AS） 〉 beside the No.7 apartment inside school （7AS） 〉 beside the main teaching building （MTB）. The BOD value was 132～ 1 370 mg/L. The COD values in the 5 sewage wells were the well in 4AS〉 7AS and BS 〉 MTB and AS. The COD value was 432～1 483 mg/L. The polluted water of each test points can＇t be directly let out.