Proec Energy, a company engaged in a specialized and
confidential manufacturing domain, approached Ventilair Engineers Pvt.
Ltd. (VEPL) in 2014 for assistance with effluent treatment. Due to
proprietary concerns, the client did not disclose the nature of raw materials
or final products but provided two 1-liter samples of process effluent for
analysis.
Challenge
Laboratory analysis of the effluent revealed extraordinarily
high pollution loads, far exceeding those typical of even high-strength
industrial wastewater such as from rice mills:
- Biochemical
Oxygen Demand (BOD): 31,660 mg/L
- Chemical
Oxygen Demand (COD): 11,570 mg/L
Such extreme organic loads presented a serious engineering
and environmental challenge. With limited information about the effluent’s
composition, conventional treatment methods alone would not suffice. VEPL
viewed this as an opportunity to demonstrate the robustness and adaptability of
its treatment technologies.
Solution: Custom 6-Stage Hybrid Effluent Treatment Plant
(H-ETP)
VEPL designed a bespoke Hybrid Effluent Treatment
Plant (H-ETP) combining physical, chemical, biological, and natural
treatment processes. The solution was implemented in six integrated stages:
- Physio-Chemical
Treatment
- Processes: Coagulation,
flocculation, and sedimentation
- Objective: Initial
removal of suspended solids and partial reduction of inorganic and organic
load.
- Biological
Treatment (MBBR Technology)
- Process: Moving
Bed Biofilm Reactor (MBBR)
- Objective: Biological
degradation of high organic content using activated sludge and biofilm
media.
- Advanced
Oxidation (Ozonation)
- Process: Ozone
injection
- Objective: Oxidation
of refractory organics, removal of color and odor.
- Disinfection
- Processes: Ultraviolet
(UV) treatment and sodium hypochlorite (hypo) dosing
- Objective: Microbial
disinfection and pathogen elimination.
- Natural
Filtration (Reed Bed System)
- System: Constructed
wetlands with plantation-based filtration
- Objective: Natural
polishing and tertiary treatment for aesthetic and ecological quality.
- Ultra-Filtration
- Objective: Final
polishing to ensure BOD levels below 10 mg/L, meeting stringent discharge
or reuse standards.
Outcome
Despite the extreme organic load and absence of chemical
composition data, VEPL’s H-ETP solution successfully treated the
effluent to meet all regulatory discharge norms. The plant has continued to
operate efficiently since commissioning, showcasing:
- Sustainable,
low-maintenance performance
- Consistent
compliance with Pollution Control Board (PCB) norms
- Capability
to handle variable and undisclosed effluent compositions
Conclusion
VEPL’s innovative and adaptive approach enabled the
successful treatment of one of the most challenging effluents encountered in
its operational history. The project stands as a testament to VEPL’s technical
expertise in custom effluent treatment solutions, even under high uncertainty
and extreme pollutant conditions.
Proec Energy, a company engaged in a specialized and
confidential manufacturing domain, approached Ventilair Engineers Pvt.
Ltd. (VEPL) in 2014 for assistance with effluent treatment. Due to
proprietary concerns, the client did not disclose the nature of raw materials
or final products but provided two 1-liter samples of process effluent for
analysis.
Challenge
Laboratory analysis of the effluent revealed extraordinarily
high pollution loads, far exceeding those typical of even high-strength
industrial wastewater such as from rice mills:
- Biochemical
Oxygen Demand (BOD): 31,660 mg/L
- Chemical
Oxygen Demand (COD): 11,570 mg/L
Such extreme organic loads presented a serious engineering
and environmental challenge. With limited information about the effluent’s
composition, conventional treatment methods alone would not suffice. VEPL
viewed this as an opportunity to demonstrate the robustness and adaptability of
its treatment technologies.
Solution: Custom 6-Stage Hybrid Effluent Treatment Plant
(H-ETP)
VEPL designed a bespoke Hybrid Effluent Treatment
Plant (H-ETP) combining physical, chemical, biological, and natural
treatment processes. The solution was implemented in six integrated stages:
- Physio-Chemical
Treatment
- Processes: Coagulation,
flocculation, and sedimentation
- Objective: Initial
removal of suspended solids and partial reduction of inorganic and organic
load.
- Biological
Treatment (MBBR Technology)
- Process: Moving
Bed Biofilm Reactor (MBBR)
- Objective: Biological
degradation of high organic content using activated sludge and biofilm
media.
- Advanced
Oxidation (Ozonation)
- Process: Ozone
injection
- Objective: Oxidation
of refractory organics, removal of color and odor.
- Disinfection
- Processes: Ultraviolet
(UV) treatment and sodium hypochlorite (hypo) dosing
- Objective: Microbial
disinfection and pathogen elimination.
- Natural
Filtration (Reed Bed System)
- System: Constructed
wetlands with plantation-based filtration
- Objective: Natural
polishing and tertiary treatment for aesthetic and ecological quality.
- Ultra-Filtration
- Objective: Final
polishing to ensure BOD levels below 10 mg/L, meeting stringent discharge
or reuse standards.
Outcome
Despite the extreme organic load and absence of chemical
composition data, VEPL’s H-ETP solution successfully treated the
effluent to meet all regulatory discharge norms. The plant has continued to
operate efficiently since commissioning, showcasing:
- Sustainable,
low-maintenance performance
- Consistent
compliance with Pollution Control Board (PCB) norms
- Capability
to handle variable and undisclosed effluent compositions
Conclusion
VEPL’s innovative and adaptive approach enabled the
successful treatment of one of the most challenging effluents encountered in
its operational history. The project stands as a testament to VEPL’s technical
expertise in custom effluent treatment solutions, even under high uncertainty
and extreme pollutant conditions.
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