感潮河地区不同排水体制中污水有机物浓度的对比研究

 对受感潮河流影响珠三角某城市的不同类型污水进行了有机物浓度调查，推算出该城市污水的COD浓度约为272mg/L。不同排水体制中污水有机物浓度的比较结果表明，分流制管道中污水COD浓度（平均191mg/L）显著高于合流制管道中污水（平均137mg/L）。合流制管道中污水COD浓度随河水水位升高而降低，呈显著负相关，偏相关系数为-0.8432。分流制管道中污水COD浓度与河水水位无相关性。在感潮河流影响的地区分流制较合流制更能阻止河水进入污水管网，能保证进入污水厂的污水COD浓度稳定维持在较高水平，分流制更适宜作为该地区的排水体制，该结果为珠三角地区排水体制的选择提供了依据。

Comparison of Organic Matter Concentration in Wastereater Between Different Drainage Systems in Districts Affected by Tidal River

Investigation on concentrations of COD of different kinds wasterwater in a city affected by tidal river in the Pearl River Delta area was carried on. And COD of the wastewater in the city, 272mg/L, was worked out. The COD Concentration of wastewater in separate system, 191mg/L on average, was significantly higher than that in combined sewerage system, 137mg/L on everage. COD concentration in combined sewerage system decreased as the river level increased, appearing significant negative correlation. The partial correlation coefficient was -0.8432. However, COD concentration in separate system appeared no correlation to the river level. In district affected by tidal river, separate system could prevent river water from backing up into the sewerage system more efficiently than combined sewerage system. On behave of the operation of wastewater treatment plants, separate system was more sutible than combined sewerage system for district affected by tidal river. References were provided for drainage systems choosing in the Pearl River Delta area.