What is a Sewage Treatment Plant (STP)?

An STP is a facility or building designed specifically to treat domestic wastewater to make it suitable for disposal in accordance with established quality standards.

What is Domestic Wastewater?

Domestic wastewater is the wastewater generated from everyday household activities or residential living, such as water used for bathing (toilet and floor drain), dishwashing, laundry, urination, defecation, and other daily household activities.

What is contained in Domestic Wastewater?

Black Water

Domestic wastewater that contains solids and tends to contain heavier contaminants. Examples include water from toilets, dishwashers, kitchens, and others.

Grey Water

Domestic wastewater with lighter content and tends to have no solids. Examples include leftover water from bathrooms (floor drains), laundry, and others.

Where is STP Needed to apply?

In every building that generates domestic wastewater without exception. All places where people engage in daily activities will inevitably produce wastewater. Buildings that generate domestic wastewater include :

• Residential areas / clusters
• Apartments / Condominiums
• Clinics, Community Health Centers & Hospitals
• School Buildings, Campuses
• Office Buildings
• Malls
• Hotels
• Factories / Industrial Zones
• Public Facilities: Stations, Airports, Restaurants, Places of Worship, Markets, and others

Quality Standards and Target for Treated Wastewater and Inlet Characteristics of STP

• Max pH : 6 - 9

• Max BOD : 30 mg/L

• Max COD : 100 mg/L

• Max TSS : 30 mg/L

• Max oil and grease : 5 mg/L

• Max Amoniac : 10 ml/L

• Max Total Coliform : 3000 (total/100ml)

• Max Debit : 100 (L/day/people)

Maximum inlet value that can be processed with the A-STP unit

pH : 6 - 9, BOD : 200 mg/L, COD : 500 mg/L, TSS : 200 mg/L, Oil and grease : 10 mg/L (if there is excess oil and fat, it must be separated at the beginning process), Amoniac : 20 ml/L, Etc.

Sewage Treatment Plant Design Concept

1. Conventional                                                                             2. Advanced STP

Advanced STP Advantages

Advanced Sewage Treatment Plant differs from conventional STP, especially in the Bio Box. Some of the advantages of choosing Advanced STP are as follows:

• LESS Sludge
• NO Odor / Smell
• SAVE Power (MBG Technology)
• LOW Footprint
• FEASIBLE Capex and Opex
• EASY : In procurement. Installation, Operation & Maintenance

Basic Design A-STP

• The above dimensions are in accordance with basic design, but may change depending on actual conditions.
• For other capacities, it can be adjusted/customized.
• Placement can be requested: above ground, buried or inside a container.

Scope of Works

• Equipment :
  • Pump : Submersible, centrifugal, sludge pump, etc
  • Air Blower : Root Blower, Ring Blower, Diffuser, etc
  • Biofilm / Biofilter Media : Bioball, Honeycomb, MBBR, etc
  • Filter & the Media 
  • Etc
• Chemical
  • Grease Decomposer : AQUARIGHT Bio-Degreaser Tab
  • Bacteri Concentrate : AQUARIGHT N 602
  • Nutrient : AQUARIGHT N 820
  • Desinfectan : Chlorine / Chlorine Tablet, Sod. Hypo
  • Etc
• Services
  • Media Filter Replacement (Fill out the survey form to get a quote here)
  • Unit Improvement
  • Etc

To see the experience of A-STP work by PT Zefa Valindo Jaya, click here, or see other water treatment experiences here. Contact us for more information. For site surveys, you can make an appointment with us by filling out the survey form here. Or you can contact us by phone at (021) 887 3531 or email info@zevanya.com.