A 125 KLD (kiloliter per day) Sewage Treatment Plant (STP) is designed to treat 125,000 liters of domestic or municipal sewage daily, suitable for residential colonies, commercial complexes, or institutional setups.
Design Specifications
Design Capacity: 125 KLD (125 m³/day) operated 24 hours/day with an average flow rate of approximately 5.20 m³/hour.
Influent Characteristics:
BOD: Around 300 mg/L
COD: About 550 mg/L
TSS: Approximately 200 mg/L
Oil and Grease: 5-10 mg/L
pH: 6.5-8.0
Temperature: 25-30°C
Effluent Standards:
BOD < 30 mg/L
COD < 150 mg/L
TSS < 20 mg/L
Oil & Grease < 1 mg/L
pH maintained within 6.5-8.
Treatment Process Overview
Pre-treatment: Collection tank with bar screen to remove large debris.
Oil & Grease Removal: Skimmer or conventional methods for separating oils.
Aeration Tank: Biological treatment where microbes degrade organic matter.
Settling Tank: Suspended solids and sludge settle, separated from clear water.
Filtration: Multi-grade filters (MGF) for suspended solids removal, followed by chlorination for disinfection.
Activated Carbon Filter (ACF): Final polishing to remove residual color, odor, and chlorine traces.
Water Reuse: Treated water suitable for gardening or low-end applications; other uses require consultation.
Design Details
Components like the collection tank, bar screen chamber, aeration tank, settling tank, and filtration units are dimensioned and designed considering hydraulic load and pollutant removal efficiency.
The plant operates continuously to achieve stable and compliant effluent quality.
Sludge generated is handled in settling tanks and removed for appropriate disposal or reuse.
Applications and Benefits
Suitable for residential colonies, educational institutions, and commercial properties.
Reduces pollution load on municipal systems and protects the environment.
Enables treated water reuse for irrigation or non-potable purposes.
Designs can be customized as per site requirements and discharge norms.
This 125 KLD STP offers an effective, environmentally compliant solution with a complete multi-stage treatment process for sustainable domestic sewage management.
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