Treatment Of Brewery Wastewater By UASB+CASS Combined Technology

With the rapid development of economic and the continuous improvement ofpeople’s living standards, the requirement for beer is increasing. Along with theexpansion of the scale of the brewery factories, the discharge of brewery wastewater isalso increasing. With a high concentration of organic matter, brewery wastewater hasgood biodegradability. It has gradually been a hot researches the entire world highabout the treatment of the brewery wastewater.The purpose of this research is to explore the suitable technology roadmap as wellas design parameters for the high concentration of brewery wastewater. Use up-flowanaerobic sludge blanket (UASB) and cyclic activated sludge system (CASS)combined process to deal with the brewery wastewater. Also research the reasonabledesign parameters, and the technical and economic analysis for UASB+CASScombined process.The main research results that at the conditions of design size5000m3/d, theinfluent COD≤1400mg/L, BOD5≤800mg/L; up-flow anaerobic sludge bed anaerobicprocess technology (UASB), volume load Nv:4.5kgCOD/(m3d); aerobic processusing cyclic activated sludge system, BOD5sludge load Ns:0.1kgBOD5/kgMLSS,UASB unit COD removal rate of80%, CASS unit COD removal rate of85%.Thetreated wastewater achieves the standard of "integrated Wastewater DischargeStandard"(GB8978-2002), COD≤100mg/L, BOD5≤20mg/L. The running cost ofthe sewage treatment station was1.126yuan/m3wastewater.The UASB+CASS combined process produces biogas, which we can recyclingused. It not only saves the investment and operating costs of the wastewater treatmentworks, really impling the economic concept of environmental protection, but alsoprovides a theoretical basis for the high concentration of the treatment of brewerywastewater.