应急药剂对城市黑臭河道水质改善的试验研究

Experimental study on water quality improvement of urban malodorous black river by emergency reagents

选取皖北某城区典型黑臭河道为研究对象,通过试验探究了3种应急药剂对于黑臭河道的水质改善效果。结果表明,Y-3#对CODCr去除能力最强,去除率为26.3%,CODCr质量浓度由122 mg/L降至90 mg/L;Y-2#对NH3-N去除效果最佳,去除率为16.9%,NH3-N质量浓度由27.71 mg/L降至23.13 mg/L;Y-3#对水体ORP和DO改善能力高于其他2种药剂,提升改善率分别可达309.2%和259.3%,ORP由-239 m V提升至501 m V、DO的质量浓度由0.45 mg/L提升至1.62 mg/L;Y-3#对水体透明度改善能力最强,提升改善率为182.8%(由29 cm提升至80 cm);3种应急药剂治理成本分别为1.25、4.24和10.71元/m3。

Taking a typical urban malodorous black river in northern Anhui province as the research object,the effect of three kinds of emergency reagents on water quality improvement was investigated. The results showed that, reagent Y-3# had the best CODCrremoval efficiency, the removal rate was 26.3%, the mass concentration of CODCrdecreased from 122 to 90 mg/L, reagent Y-2# had the best NH3-N removal efficiency, the removal rate was 16.9%, the mass concentration of NH3-N decreased from 27.71 to 23.13 mg/L, among all those reagents, reagent Y-3# had a better promoting capacity on ORP and DO, the improvement rate reached 309.2%and 259.3% respectively, the ORP value and DO value were increased from-239 m V, 0.45 mg/L to 501 m V and1.62 mg/L respectively. Reagent Y-3# had the strongest promoting capacity on water transparency, the promotion rate was up to 182.8%（raised from 29 cm to 80 cm）; the cost that using the above three emergency reagents to treat sewage were 1.25, 4.24 and 10.71 yuan/m3 respectively.