1. Daily Activities: STP Maintenance – General Guideline Sheet 1. Daily Activities: ✔️ Check inlet and outlet flow readings. ✔️ Record pH, DO (Dissolved Oxygen), and MLSS (Mixed Liquor Suspended Solids). ✔️ Ensure blowers, pumps, and aerators are functioning. ✔️ Remove floating debris from screens and tanks. ✔️ Maintain operator logbook for daily records. 2. Weekly Activities: 🔄 Backwash pressure sand filters (PSF) and activated carbon filters (ACF). 🧪 Test treated water for BOD, COD, TSS, and pH (basic onsite test kits). 🛑 Inspect pipelines and valves for leaks or blockages. ⚡ Check power supply panels, motor amperage, and safety switches. 3. Monthly Activities 🧼 Clean aeration tank and secondary clarifier of excess sludge. 📊 Send treated water sample to NABL-certified lab for analysis (MPCB compliance). 🔧 Lubricate pumps, blowers, and moving parts. 🔍 Calibrate instruments like pH meter, DO meter. 🧯 Inspect safety equipment: fire extinguishers, PPE for operators. 4. Quarterly Activities 🛠️ Service all pumps, blowers, and motors thoroughly. 🧾 Review energy consumption for optimization. 🧹 Remove accumulated sludge from sludge holding tanks. 📑 Update documentation for MPCB/PCB reporting. 5. Annual Activities ✅ Major overhauling of STP equipment. ✅ Desilting of equalization and aeration tanks. ✅ Check and replace filter media if required. ✅ Review AMC contracts and renew compliance certificates. 6. Best Practices 🕒 Maintain preventive maintenance schedule rather than reactive fixes. 📈 Keep digital logs of parameters and maintenance work. 👷 Train operators in safety and troubleshooting. ♻️ Use treated water for gardening, flushing, or cooling towers to save costs. 🚫 Never bypass STP discharge directly to drains (penalty risk). 7. Emergency Protocols ⚡ Power failure → Start DG set immediately to keep blowers running. 💧 Sudden odor/foaming → Check aeration tank DO and chemical dosing. 🛑 Equipment failure → Isolate faulty unit and inform AMC service partner. 👉 Tip : Regular STP maintenance not only ensures MPCB compliance but also reduces electricity, chemical usage, and extends plant life.