Forum Questions Advanced Wastewater Treatment and Reuse Exam Questions and Answers

True or False: In most cases, advanced wastewater treatment may not be required to meet criteria required to reuse water. - Answer-False (Practically all secondary treatments besides MBR cannot achieve treatment goals for reuse water. While MBR is considered secondary treatment, it provides the effluent quality of tertiary treatment) True or False: Using a membrane bioreactor (MBR) for treatment provides similar effluent quality as conventional activated sludge followed by effluent filtration. - Answer-True True or False: When low-pressure membranes, microfiltration, or ultrafiltration are used, lower dosages of disinfectant are required for disinfection. - Answer-True True or False: The most commonly used advanced wastewater treatment technologies are low-pressure membranes, microfiltration or ultrafiltration, media filters, and cloth filters. - Answer-True True or False: Reuse water is allowed to supplement directly the potable water supply in some states. - Answer-False (No state or country allows using tertiary effluent for direct potable supply. A few states and countries allow using tertiary effluent as an indirect supplement for the potable water supply) True or False: Reverse osmosis is most commonly used to remove high concentrations of total dissolved solids from tertiary treated wastewater effluent. - Answer-True True or False: Microfiltration and ultrafiltration are most commonly used to remove high concentrations of total dissolved solids from tertiary treated wastewater effluent. - Answer-False (Micro- and ultrafiltration are low-pressure membranes. They remove suspended and colloidal matter from the water but cannot remove dissolved solids. Some dissolved components can be removed when using chemicals along with micro- and ultrafiltration membranes, but overall TDS cannot be removed)