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CO-GUIDED BY SUB-GUIDED BY

MS. UZMA DILSHAD MR. SONKER

DEPARTMENT OF CIVIL ENGG.

PRESENTED BYSUSHILE KUMAR VERMA CE

54

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Introduction

UASB technology

Flow Diagram

Design Parameters Brief Description of units

Screen

Grit Chamber

UASB ReactorChlorine contact tank

Conclusion

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One of Asia's largest sewage treatment plants built at

Bharwara Sewage Treatment plant in Gomti Nagar

Lucknow .

It is been design for the capacity 345 mld and extended in

area about120 hectare land.

The plants is basically based on the technology of up flow

Anaerobic Sludge blanket Technology [UASBR]

The plant is reduces Toxic level of waste water i.e reduces

factor like as BOD, ph ,sulphide & fluoride contents.

Work on the Rs 169 crore STP was started by Jal Nigam in

July 2008 and originally, the project was to be completed

within a year.

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UASB technology is based onAnaerobic process.

3-phase seperation device is themost characteristics feature of UASBreactor.

Wastewater flows upwards through a

sludge blanket located in lower partof reactor, while upper part containsa three phase (solid, liquid, gas)separation system.

It facilitates the collection of biogasand also provides internal recycling of

sludge by disengaging adherent biogasbubbles from rising sludge particles. Superior settling characteristics ofgranular sludge allows higher sludgeconcentrations and consequentlypermitted.

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Design average flow

345mld

Peak factor

1.50

S.NO. PARAMETER INFLUENT

EFFLUENT

1. Total suspended solids mg/l 300-606

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Screening is the first unitoperation used atwastewater treatmentplants.

Pre-treatment is done insceens and grit chamber.

Screening removes objectssuch as rags, paper,plastics, and metals to

prevent damage andclogging of downstreamequipment, piping, andappurtenances.

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Grit is sewage consist of coarse particle of sand, ash and clinkers,eggshells, bone chips and many inert material inorganic in nature.

Grit chamber consists of a cylindrical tank in which the flow enterstangentially, creating a vortex flow pattern.

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The effluent received after polishingpond will be disinfectant in chlorinetank with a dose of approx 5 mg/l ofchlorine gas dosing.

The chlorine contact time has beenkept about 30 minutes .

The chlorine gas is contact with thetreat the sewage and will be capableto remove the faecal coliform bychemical reaction.

It is hoped that MNP will reducebelow 10000 per hundred ml by theapplication of chlorine gas.

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Pre aeration tank has been

produced to aerate the effluent

from UASB rector to release

the trapped gases. Aeration will

remove sulphide. The pre

aeration may also be useful to

change the anaerobic nature of

effluent of UASB to aerobic.

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After the commissioning of 345 mld STP at Lucknow it is

hoped at the Gomti river will get rid of pollution of wastewater of nallas that effect the health of Gomti river will

improve with the increase of Dissolved oxygen in the river

and not only the life of Lucknow will improve but also

aquatic life will survive in Gomti, the life line of Lucknow.

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FOR GIVING ME AVALUABLE TIME