Pune instals online system to check quality of treated sewage quality
SMART CITIES

Pune instals online system to check quality of treated sewage quality

The Pune Municipal Corporation (PMC) will install an online system to check sewage water meter on sewage treatment plants (STPs) that checks the quality of treated water, which is released to Mula-Mutha rivers. It will also help to know how much water is treated and released in rivers.

The Mula-Mutha river is one of the 302 polluted river stretches of the country identified by the Central Pollution Control Board (CPCB).

A total of 744 MLD of sewage is generated in the PMC limit. Of the 744 MLD, the civic body treats around 460 MLD sewage through nine STPs and discharges into the Mula Mutha rivers. Pune City covered 92 % of the sewerage network of 2,200 km. Normally, sewage water calculates 80% of the daily supply of drinking water. At present, the corporation supplies around 1,100 million liter per day (MLD) in the city. So, the city generates 880 MLD sewage water.

According to corporation data, PMC does not have 100% collection efficiency of sewage networks and adequate sewage treatment capacity as per service benchmark. The PMC has mentioned 64% capacity in the Environment Status Report (ESR-2018-19). However, the PMC drainage department has claimed 100% quality of sewage treatment in the ESR-2018-19 report.

The new online system will help to prove the claim of PMC. As per the Central Pollution Control Board (CPCB) and Maharashtra state pollution control board directives, the PMC has decided to install an online system that will display inlet and outlet water samples of sewage.

Shriniwas Kandul, the additional city engineer of the electrical department, said, “It is an online testing system. We will place a meter inlet and outlet of sewage plant which will show characteristics of water such as the Biochemical Oxygen Demand (BOD) and Chemical Oxygen Demand level (COD) of sewage and treated water, pH (acidity or basicity of water).”

“The BOD and COD level is one of the major parameters to check the quality of sewage water. Both should be below 30 milligrams per liter of water. Normally, sewage water BOD and COD level is more than 150 milligrams per liter of water. After treatment, it comes down to 20 milligrams per liter of water. The system will also show people how much water PMC treats in each STP,” he added.

According to Kandul, the PMC is not treating 100% sewage. However, the corporation has planned to construct 11 new sewage treatment plants (STPs) in the future.

“It will result in a creation of an additional treatment capacity of 396 million liters per day (MLD) over the existing treatment capacity of 477 MLD, laying of 113.6 km of sewer lines and renovation/rehabilitation of four existing intermediate pumping stations,” Kandul said.

How does the sewerage system work?
The sewage system consists of a collection network, conveyance lines, pumping stations, and sewage treatment plants. The collection network collects sewage from houses, apartments, commercial complexes, or from other sources.

This collected sewage is further carried to pumping stations or Sewage Treatment Plants (STP) via conveyance lines. Pumping stations pump the sewage to STPs where primary and biological secondary treatment is given to sewage water before discharging into any natural watercourse.

The Pune Municipal Corporation (PMC) will install an online system to check sewage water meter on sewage treatment plants (STPs) that checks the quality of treated water, which is released to Mula-Mutha rivers. It will also help to know how much water is treated and released in rivers.The Mula-Mutha river is one of the 302 polluted river stretches of the country identified by the Central Pollution Control Board (CPCB).A total of 744 MLD of sewage is generated in the PMC limit. Of the 744 MLD, the civic body treats around 460 MLD sewage through nine STPs and discharges into the Mula Mutha rivers. Pune City covered 92 % of the sewerage network of 2,200 km. Normally, sewage water calculates 80% of the daily supply of drinking water. At present, the corporation supplies around 1,100 million liter per day (MLD) in the city. So, the city generates 880 MLD sewage water.According to corporation data, PMC does not have 100% collection efficiency of sewage networks and adequate sewage treatment capacity as per service benchmark. The PMC has mentioned 64% capacity in the Environment Status Report (ESR-2018-19). However, the PMC drainage department has claimed 100% quality of sewage treatment in the ESR-2018-19 report.The new online system will help to prove the claim of PMC. As per the Central Pollution Control Board (CPCB) and Maharashtra state pollution control board directives, the PMC has decided to install an online system that will display inlet and outlet water samples of sewage.Shriniwas Kandul, the additional city engineer of the electrical department, said, “It is an online testing system. We will place a meter inlet and outlet of sewage plant which will show characteristics of water such as the Biochemical Oxygen Demand (BOD) and Chemical Oxygen Demand level (COD) of sewage and treated water, pH (acidity or basicity of water).”“The BOD and COD level is one of the major parameters to check the quality of sewage water. Both should be below 30 milligrams per liter of water. Normally, sewage water BOD and COD level is more than 150 milligrams per liter of water. After treatment, it comes down to 20 milligrams per liter of water. The system will also show people how much water PMC treats in each STP,” he added.According to Kandul, the PMC is not treating 100% sewage. However, the corporation has planned to construct 11 new sewage treatment plants (STPs) in the future.“It will result in a creation of an additional treatment capacity of 396 million liters per day (MLD) over the existing treatment capacity of 477 MLD, laying of 113.6 km of sewer lines and renovation/rehabilitation of four existing intermediate pumping stations,” Kandul said.How does the sewerage system work? The sewage system consists of a collection network, conveyance lines, pumping stations, and sewage treatment plants. The collection network collects sewage from houses, apartments, commercial complexes, or from other sources.This collected sewage is further carried to pumping stations or Sewage Treatment Plants (STP) via conveyance lines. Pumping stations pump the sewage to STPs where primary and biological secondary treatment is given to sewage water before discharging into any natural watercourse.

Next Story
Equipment

Handling concrete better

Efficiently handling the transportation and placement of concrete is essential to help maintain the quality of construction, meet project timelines by minimising downtimes, and reduce costs – by 5 to 15 per cent, according to Sandeep Jain, Director, Arkade Developers. CW explores what the efficient handling of concrete entails.Select wellFirst, a word on choosing the right equipment, such as a mixer with a capacity aligned to the volume required onsite, from Vaibhav Kulkarni, Concrete Expert. “An overly large mixer will increase the idle time (and cost), while one that ..

Next Story
Real Estate

Elevated floors!

Raised access flooring, also called false flooring, is a less common interiors feature than false ceilings, but it has as many uses – if not more.A raised floor is a modular panel installed above the structural floor. The space beneath the raised flooring is typically used to accommodate utilities such as electrical cables, plumbing and HVAC systems. And so, raised flooring is usually associated with buildings with heavy cabling and precise air distribution needs, such as data centres.That said, CW interacted with designers and architects and discovered that false flooring can come in handy ..

Next Story
Infrastructure Urban

The Variation Challenge

A variation or change in scope clause is defined in construction contracts to take care of situations arising from change in the defined scope of work. Such changes may arise due to factors such as additions or deletions in the scope of work, modifications in the type, grade or specifications of materials, alterations in specifications or drawings, and acts or omissions of other contractors. Further, ineffective planning, inadequate investigations or surveys and requests from the employer or those within the project’s area of influence can contribute to changes in the scope of work. Ext..

Advertisement

Advertisement

Subscribe to Our Newsletter

Get daily newsletters around different themes from Construction world.

STAY CONNECTED

Advertisement

Advertisement

Advertisement

Advertisement

Talk to us?