Which of the following methods can enhance the efficiency of sewage treatment?

Regular maintenance of equipment plays a crucial role in enhancing the efficiency of sewage treatment processes. Well-maintained equipment can operate at optimal conditions, reducing the likelihood of breakdowns and ensuring that treatment processes are carried out effectively. This includes routine checks, timely repairs, and replacements as needed to keep the machinery functioning properly. When equipment operates smoothly, it contributes to better treatment outcomes, reduced downtime, and improved overall system reliability.

In contrast, while reducing the amount of grease in the system is important to prevent clogging and ensure that the treatment process runs efficiently, it does not directly improve the treatment efficiency on its own. Encouraging staff to work overtime can lead to worker fatigue and increased risk of errors, potentially compromising the maintenance and operation quality. Increasing the inflow of sewage without ensuring the treatment system is adequately equipped and maintained can overwhelm the system, leading to inefficiencies and possible treatment failures. Hence, regular maintenance stands out as the fundamental method for enhancing sewage treatment efficiency.