(1) Hydrolysis Acidification Method: The full name of the hydrolysis tank is Hydrolysis Upflow Sludge Blanket (HUSB), which is an improved UASB. Compared with the whole-process anaerobic tank, the hydrolysis tank has the following advantages: it does not require sealing or stirring, does not require a three-phase separator, reducing costs and facilitating maintenance; it can degrade large molecules and non-biodegradable organic matter in wastewater into small molecules and easily biodegradable organic matter, improving the biodegradability of raw water; the reaction is rapid, the tank volume is small, the infrastructure investment is low, and it can reduce the amount of sludge.
(2) UASB Method: The UASB reactor has the advantages of high anaerobic digestion efficiency, simple structure, short hydraulic retention time, and no need for a separate sludge return device. When using the UASB method to treat pharmaceutical production wastewater such as kanamycin, chloramphenicol, vitamin C, SD, and glucose, the SS content is usually required to be not too high to ensure that the COD removal rate is above 82%~90%. (3) The UBF method compared UASB and UBF. The results showed that UBF has the characteristics of good mass transfer and separation effect of reaction liquid, large biomass and many species of organisms, high treatment efficiency and strong operation stability. It is a practical and efficient anaerobic bioreactor.
