For treating wastewater with COD concentration greater than 4 - 5 g/L, it is recommended to apply dilution during start-up, for proper granulation of sludge inside UASB reactor. Auxiliary equipment has to be installed for addition of essential nutrients, and alkalinity for control of pH of the influent. The other equipments to be provided are for measurement of pH, temperature, influent flow rate, and gas production rate.
Thus, this design of the reactor will meet all design recommendation proposed in the literature. The proper design of reactor along with GLS separator will help in better retention of the sludge inside the reactor. This will help in reducing start-up time, required for the reactor to achieve steady state, and better performance of the reactor during steady state.