Q: What are the CPCB standards for treated hotel sewage?

Treated effluent from hotel STPs must meet CPCB/SPCB discharge standards before release to the environment. For inland surface water discharge: BOD <30 mg/L, COD <250 mg/L, TSS <100 mg/L, pH 6.5–8.5, Total Coliform <1000 MPN/100 mL. For reuse in gardening or irrigation: BOD <10 mg/L, TSS <30 mg/L, Total Coliform <100 MPN/100 mL (disinfected). For toilet flushing: additional treatment including chlorination/UV disinfection is required. A well-designed MBBR/MBR-based hotel STP with UV disinfection routinely achieves these standards.

Q: Can treated water from a hotel STP be reused?

Yes — and reuse is increasingly mandated or encouraged by regulatory authorities and green building standards (IGBC, LEED). Treated STP water can be reused for: (1) landscape irrigation and gardening — the largest reuse opportunity for hotels with gardens, golf courses, or resort grounds; (2) toilet and urinal flushing — saving significant potable water in large hotels; (3) HVAC cooling tower makeup — after additional polishing; and (4) car washing. Reuse not only reduces freshwater consumption and water bills but can also be credited under green hotel certification programmes.

Q: What is the capacity of an STP for a 100-room hotel?

A 100-room hotel in India typically generates 10–15 KLD of sewage, assuming 100–150 litres per occupied room per day plus kitchen, laundry, and staff facilities. For a 100-room hotel, an STP of 15–20 KLD design capacity (to allow for occupancy peaks and operational margins) is typically appropriate. Larger hotels (250–500 rooms) require STP capacity of 40–80 KLD; a 5-star business hotel of 400+ rooms in a metro city may generate 60–100 KLD. Spans Envirotech offers standardised packaged STP units at 10, 15, 25, 50, and 100 KLD capacities.

Question 1

Are hotels required to have an STP in India?

Accepted Answer

Yes. Hotels in India above a certain threshold of rooms, area, or wastewater generation are required to install and operate Sewage Treatment Plants (STPs) under the Environment (Protection) Act 1986, Water (Prevention and Control of Pollution) Act 1974, and applicable state environment regulations. The specific threshold varies by state but typically applies to hotels with 20+ rooms or generating >10 KLD of wastewater. MoEFCC has also issued sector-specific guidelines for hospitality requiring STP installation. Non-compliance can result in Consent to Operate denial or penalty.

Question 2

What technology is used in a hotel STP?

Accepted Answer

Hotel STPs most commonly use Moving Bed Biofilm Reactor (MBBR) or Membrane Bioreactor (MBR) technology for biological sewage treatment. MBBR systems are popular for their compact footprint, low maintenance, and ability to handle variable loads from occupancy fluctuations. MBR systems produce superior effluent quality (TSS <1 mg/L, BOD <5 mg/L) suitable for direct reuse, at higher capital cost. For very small hotels, Sequencing Batch Reactor (SBR) or rotating biological contactor systems are also used. Spans Envirotech recommends MBBR-based systems for most hotel applications due to the best balance of cost, footprint, and reliability.

Question 3

What are the CPCB standards for treated hotel sewage?

Accepted Answer

Treated effluent from hotel STPs must meet CPCB/SPCB discharge standards before release to the environment. For inland surface water discharge: BOD <30 mg/L, COD <250 mg/L, TSS <100 mg/L, pH 6.5–8.5, Total Coliform <1000 MPN/100 mL. For reuse in gardening or irrigation: BOD <10 mg/L, TSS <30 mg/L, Total Coliform <100 MPN/100 mL (disinfected). For toilet flushing: additional treatment including chlorination/UV disinfection is required. A well-designed MBBR/MBR-based hotel STP with UV disinfection routinely achieves these standards.

Question 4

Can treated water from a hotel STP be reused?

Accepted Answer

Yes — and reuse is increasingly mandated or encouraged by regulatory authorities and green building standards (IGBC, LEED). Treated STP water can be reused for: (1) landscape irrigation and gardening — the largest reuse opportunity for hotels with gardens, golf courses, or resort grounds; (2) toilet and urinal flushing — saving significant potable water in large hotels; (3) HVAC cooling tower makeup — after additional polishing; and (4) car washing. Reuse not only reduces freshwater consumption and water bills but can also be credited under green hotel certification programmes.

Question 5

What is the capacity of an STP for a 100-room hotel?

Accepted Answer

A 100-room hotel in India typically generates 10–15 KLD of sewage, assuming 100–150 litres per occupied room per day plus kitchen, laundry, and staff facilities. For a 100-room hotel, an STP of 15–20 KLD design capacity (to allow for occupancy peaks and operational margins) is typically appropriate. Larger hotels (250–500 rooms) require STP capacity of 40–80 KLD; a 5-star business hotel of 400+ rooms in a metro city may generate 60–100 KLD. Spans Envirotech offers standardised packaged STP units at 10, 15, 25, 50, and 100 KLD capacities.

Hotel Sewage Treatment Plant (STP)

Hotel Sewage Treatment Plant (STP)

Key Environmental Challenges

Variable Flow from Occupancy Fluctuations

Space Constraints within Hotel Properties

High FOG from Kitchen and F&B Operations

Odour Control in Occupied Spaces

Operator Skill Level

Regulatory Compliance and Green Certifications

Tailored Wastewater Treatment Solutions

Compact Packaged MBBR-Based STP

MBR Systems for High-Quality Treated Water

Grease Trap and FOG Pre-Treatment

Treated Water Reuse — Landscape and Flushing

Odour Control System

SCADA Monitoring and Remote Alerts

Proven Technologies for Your Industry

Why Choose Spans for Your Industry

Case Studies

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