A.T.E. Huber Envirotech Private Limited specializes in industrial and municipal wastewater treatment, leveraging 180 years of experience from Huber SE and completing over 300 projects in 10 countries. They offer a range of solutions, including packaged sewage treatment plants with de-nitrification, designed to efficiently treat sewage while adhering to strict environmental standards. Their modular, compact systems optimize space and reduce power consumption, with advanced features such as membrane bio-reactors and comprehensive sludge management.

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Packaged STP
(with de-nitrification)
A.T.E. HUBER Envirotech Private Limited
V2.0 May 2017

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About A.T.E. HUBER Envirotech Private Limited
A.T.E. HUBER Envirotech Private Limited (AHET) is a joint venture between A.T.E., India, and HUBER SE,
Germany
Huber is backed with 180 years of experience and has completed more than 40,000 projects in 60 countries
AHET has executed more than 300 projects in 10 countries over the last 19 years
AHET has expertise in handling wastewaters from the chemical, petrochemical, pharmaceutical, textile,
dairy, sugar, distillery and municipal sectors
AHET offers proven products and technologies for industrial and municipal wastewater treatment,
recycling and zero liquid discharge and sludge management
A.T.E. is a diversified engineering group with over 80 years of experience in different verticals;
Huber SE is a global leader in wastewater treatment and sludge management solutions

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AHET offerings and industries served
Industries served
 Textile  Paper and pulp
 Dairy  Power
 Sugar  Petrochemical
 Chemical  Food
 Pharma  Municipal
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Our offerings
 Industrial wastewater treatment plants  Headworks for municipal wastewater plants
 Anaerobic and aerobic biological
treatment plants
 Wide range of screens (coarse to ultrafine screens)
 Membrane bio-reactors  Dissolved air floatation systems
 SUFRO, reverse osmosis plants for
water recycling
 Comprehensive sludge management systems
including sludge dryers
 ZLD including MEE and ATFD  Sludge to energy projects

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Packaged sewage treatment (with de-nitrification)
 AHET’s packaged sewage treatment
plant (STP) is a virtually self contained system
for sewage treatment that is 'plug & play'
 It comprises of one outer tank constructed from
non-corrosive FRP that includes adequate
primary and two stage secondary treatment
(for de-nitrification)
 For each model of the packaged STP, tertiary
treatment is available in the form of skid-
mounted sand and carbon filter or a membrane
bio-reactor (MBR) as an optional add-on
 Treatment of sewage is mandatory for all
industries in industrial zones and also for
housing societies with an area over 20,000 m2

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Residual nutrients in treated sewage – especially nitrogen – makes it conducive for
algal growth in the presence of sunlight
Sewage contains biodegradable organics (BOD) as well as nutrients like nitrogen and
phosphorus
Why de-nitrification is important
The algae makes the treated sewage unsuitable for reuse. Algal growth gives rise to
a foul smell, clogs pipes and fittings and also increases the toxicity of the water
National Green Tribunal’s norms for treated sewage specify BOD < 10 mg/l, suspended
solids < 10 mg/l, total nitrogen (TN) < 10 mg/l and fecal coliform (MPN 100 ml) < 230
Conventional STPs treat BOD but cannot reduce nutrients like nitrogen or
phosphorus

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Process flow – packaged STP
(with sand and carbon filtration)
PACKAGED STP SAND & CARBON
FILTER

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Process flow – packaged STP
(with MBR)
PACKAGED STP WITH MBR

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Packaged STP process
Sedimentation and separation chamber:
 Separation chamber separates larger matter (like plastic pieces, sachets etc.)
 Heavier particles settle in the 1st chamber due to higher density
Anaerobic chamber:
 The first stage of the biological process; consists of media on which the anaerobic bacteria grow
 Anaerobic bacteria decompose the organic matter (BOD & COD) – almost 50 to 60% degradation
 Anaerobic bacteria do not require oxygen for their survival and growth (hence, no blower required)
Aerobic chamber:
 The second stage of the biological process; consists of media on which the aerobic bacteria grow
 Aerobic bacteria decompose the residual BOD & COD
 Aerobic bacteria require oxygen (blower is provided)
 Air is supplied to the chamber by a diffuser for efficient oxygen transfer
Treated water chamber:
 NaOCl dosing system is provided for disinfection of the treated water

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Tertiary treatment process (add-on)
Option 1: Skid mounted sand carbon filtration
 Comprises of sand and carbon filters along with feed and
backwash pump and control panel
 Mounted on a compact skid
 Sand and carbon filters are housed in a non-corrosive FRP
construction
Option 2: MBR
 Compact MBR module placed in the final chamber of the
packaged STP
 MBR membranes are robust, flat sheet back-washable type
 Membrane porosity 0.04 micron (ultrafiltration membrane)
 Membrane material of construction is Polyether Sulfone (PES)
 Membranes also have unique self healing property; small pin
holes (if any) are blocked during running

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Packaged STP performance
Parameter Inlet Outlet
Packaged Sewage
Treatment Plant
Activated
Carbon Filter
Membrane
bioreactor
BOD (mg/l) 300 < 10 < 10 < 5
Suspended solids (mg/l) 200 < 10 < 10 < 1
pH 6-8 6-8 6-8 6-8
Oil and grease (mg/l) 50 < 10 < 3 ND*
Coliform (MPN/100 ml) 2 X 109 < 230 < 230 ND*
Total nitrogen TN (mg/L) 50 < 10 < 10 < 10
*ND: not detectable

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Features & benefits
Compact, single FRP tank design
 40% less space compared to a conventional STP
 Virtually no civil work
Modular and wide capacity range
 5 KLD to 100 KLD
 Easy and quick installation (2 to 7 days)
 Underground/above ground installation possible
Anaerobic – aerobic process
 Consumes 30% less power
 Enhanced quality of treated water
 Helps in de-nitrification. Reduces Total Ammoniacal
Nitrogen (TAN) to < 5 mg/l
 Generates less sludge (desludging once in 4-6
months)
 Enclosed tanks design. No unpleasant odours
released
 Low maintenance

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Installations
Food processing unit (Malegaon)Pharmaceutical company (Patalganga)

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Installations
Textile garment unit (Tarapur)Pharmaceutical company (Aurangabad)

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