Co-treatment at Bingawan STP, Kanpur
Location: Bingawan, Zone II |
Designed Capacity of the STP: 210MLD (Design) |
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Scale:Zonal |
STP operational since: N/A |
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Implementing Organisation: Kanpur Nagar Nigam * UP Jal nigam |
Co-treatment operational since: September, 2017 |
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Area of the plant: N/A |
Capital Cost for co-treatment: INR 0.8 million |
Project Background
The Bingawan STP has an installed capacity of 210 MLD. STP receives waste water flow ranging from 80 to 90 MLD. As the construction of a diversion drain at Sisamau gets completed, the STP will start receiving additional waste water flows of 80 MLD taking the total waste water flows to around 170 MLD. The presence of spare treatment capacity was a key contributing factor for initiating co-treatment of septage at Bingawan. The STP serves an area of 130 km2 (approximately one fourth of the city’s area) and has approximately 0.261 million connections. Within the area served by the Bingawan STP the total length of sewer lines is 75 km2 and there are 7,500 manholes and 4 Sewage Pumping Stations (SPS).
Treatment technology
The original technology installed in the system was Upflow AnaerobicSludge Blanket (UASB) Reactor system, however to use co-treatment the following components have been added:
Receiving Station: A manhole, for receiving septage, has been created at the STP’s entrance intowhich private desludging operators decant their tankers. The manhole was created prior to theinitiation of co-treatment at a cost of approximately INR 0.8 million. The area around the manholewas subsequently paved and a gradient was created to allow any spillage to flow back into themanhole. The manhole is large and allows three tankers to decant simultaneously.The septage mixes with the waste water being received by the STP through the manhole and a pipeconnecting the septage receiving manhole to the inlet chamber of the STP, prior to the preliminarytreatment process and the combined waste stream subsequently undergoes the entire treatmentcycle. Discussions with staff at the STP revealed thatthe implementation of co-treatment did not require any retrofits or additions to the treatment trainor changes in O&M protocols at the STP.
The access to the STP (and the decanting facility) is through a dirt road off the Hamirpur (Naubasta) highway. The trucks are permitted entry between 8 am and 7 pm which also corresponds to the duty timings of the supervisor especially appointed for this operation. Since the boundary wall for the STP complex has not yet been constructed, the trucks are not permitted entry after 7 pm. The supervisor maintains a log book in which the records with details of each truck using the facility.
Business Model:
• Registration: Private operators have to register with the KNN after payinga registration charge of INR 1,000 per truck. This amount is to be paidannually for renewal of registration.
• Tipping Fee: Private operators have to make a monthly payment of afixed tipping fee (INR 3,500) for using decanting facilities at the BingawanSTP. There is no upper limit on the number of visits by a truck daily ormonthly.
• Payment: The registration charge and tipping fee will be collected by theKNN or any other agency which may be engaged by KNN to collect thesecharges. The collections thus made have to be deposited in the KNNaccount within 24 hours.
• Issuing a receipt: The KNN will issue a receipt for all payments made. Thereceipt must clearly mention the date, month and duration for which thepayment has been made. It is the responsibility of the private desludgingoperator to safely keep a copy of the receipt and produce it for review asand when required by the municipal authorities. A copy of this receipt hasto be shown to the supervisor at the STP while seeking entry.
• Charges for Households: The private operators can charge households INR 600 for desludging one septic tank13.
Impact of co-treatment
City population being served by co-treatment: Given that there are anywhere between 60-80 trips per day, it is estimated that the co-treatment of septage at Bingawan is able toprovide septage treatment solution for between 27,000 – 0.112 million households withseptic tanks annually17.
Regularisation of private desludging operators: The 21 private tankers who are registeredwith the KNN for decanting septage at the Bingawan STP have been regularised. Theiractivities are now regularly monitored by the KNN through the log books that aremaintained at the STP.
Environmental Impact: The initiative coupled with strict enforcement of the provisions ofthe Municipal Waste Management Rules and the recommendations of the National GreenTribunal have ensured that illegal dumping of septage has been reduced dramatically inDivision II.
Potential Source of Revenue: The annual registration charge and the monthly tipping feecharged to the private desludging operators have emerged as a revenue source for the KNN.In the last six months approximately INR 0.462 million have been collected.
*This study has been adapted from a study conducted by Mr. Sanjay Gupta, Independent consultant, sgupta40@hotmail.com
Contact person:
Brijesh Kumar Bhadauria (PE)
UP JAL NIGAM
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