Abstract:

At present, the sewage plant produces a large amount of sludge with high water content, and the landfill site is relatively tight. To address this problem, the water content of sludge was reduced by applying "ferric chloride+ lime" as modifier and introducing high-pressure belt-type continuous sludge deep dewatering technology. Take the reconstruction project of a water purification plant in Kunming, Yunnan Province as an example, the operation results of the water purification plant for 6 consecutive months showed that: High-pressure belt continuous sludge deep dewatering technology could reduce the moisture content of sludge from 80% to about 60%, sludge from 160 t/d to 87.2 t/d, and the sludge reduction rate reached 45.5%. The high-pressure belt type continuous sludge deep dewatering technology can meet the national requirements for sludge reduction, stabilization, and harmlessness, and provides engineering examples for similar projects.

Key words: sludge reduction, deep dehydration of continuous high-pressure belt sludge, ferric chloride, lime

摘要：

针对目前污水厂产生大量含水率较高的污泥，且填埋场地较为紧张的问题，提出应用以“氯化铁+石灰”为改性剂并引进高压带式连续污泥深度脱水技术，降低污泥含水率的措施。以云南省昆明市某水质净化厂改建工程为例，水质净水厂连续6个月的运行结果表明：高压带式连续污泥深度脱水技术使污泥含水率由80%降至60%左右，污泥由160 t/d降至87.2 t/d，污泥减量率达45.5%。高压带式连续污泥深度脱水技术能够满足国家对污泥减量化、稳定化等的要求，该工程实例可为相似工程污泥减量处理提供借鉴。

关键词: 污泥减量, 高压带式连续污泥深度脱水, 氯化铁, 石灰

CLC Number: 

• X703