石灰纯碱法和双碱法处理高硬度废水的试验研究  

Experimental Study on Treatment of High Astewater by Lime Soda Ash Method and Double Alkali Method

作　　者：袁红彬 薛石龙 方素梅 周密 Yuan Hongbin;Xue Shilong;Fang Sumei;Zhou Mi(Zhuhai 9TONE Water Service Inc.,Zhuhai,China)

机构地区：[1]珠海九通水务股份有限公司,广东珠海

出　　处：《科学技术创新》2024年第24期91-94,共4页Scientific and Technological Innovation

摘　　要：北京某企业生产废水总硬度(以CaCO3计)为533 mg/L,钙硬度(以CaCO3计)为316 mg/L,总碱度为262 mg/L;分别采用石灰-纯碱法和双碱法进行实验,结果表明:在常温下(25℃),采用石灰-纯碱法,石灰投加量为0.55 g/L、纯碱投加量为0.4 g/L时,出水效果最佳;采用双碱法,氢氧化钠投加量为0.4 g/L、纯碱投加量为0.06 g/L时,出水效果最佳,两种除硬方法均能达到85%以上的硬度去除率;相比之下,双碱法用药量更低,更具有经济效益。The industrial wastewater from a company in Beijing has a total hardness of 533 mg/L(as CaCO3),a calcium hardness of 316 mg/L(as CaCO3),and a total alkalinity of 262 mg/L.Experiments were carried out using lime-soda ash method and double-alkali method respectively.The results indicated that,at room temperature(25℃),the optimal treatment efficiency for the lime-soda ash method was achieved with a lime dosage of 0.55 g/L and a soda ash dosage of 0.4 g/L.Moreover,for the double-alkali method,the optimal efficiency was attained with a sodium hydroxide dosage of 0.4 g/L and a soda ash dosage of 0.06 g/L.Both methods achieved hardness removal rates exceeding 85%.However,the double alkali method requires less reagent,thus offering greater economic benefits.

关 键 词：高硬度废水 石灰纯碱法 双碱法 烧杯实验 药剂最佳用量 

分 类 号：TU991.2[建筑科学—市政工程]