Waste Water Treatment

Coagulants and Flocculants

The need for organic coagulants and flocculants

Organic coagulants are highly charged low molecular weight polymers designed for coagulations (charge neutralization). Flocculants are high molecular weight molecule whose charge density ranges from low to high. They are highly effective in helping solid-liquids separation in clarifiers, thickeners and sludge dewatering equipment in waste water treatment plant. Their benefit includes:

  • Improves final effluent quality
  • Improves settling rates in a sedimentation Clarifiers
  • Improves flotation rates in dissolved air flotation units
  • Increases final sludge density, dryness of cake and lower filtrate solids
  • Lower dosage requirement and cost effective


  • Coagulants
  • Anionic and Cationic powder flocculants





Role of enzymes

The complex constituents of effluent stream, increases environmental burden (represented as higher COD). Enzymes play a crucial role in digesting some of these constituents and convert them into food for bacteria (already used in process to reduce COD).

Application areas

Aeration pond, IC tower inlet are typically the enzymatic application area, where the conversion of non-food is converted into easy food for bacteria.
Amazon Papyrus has suitable products to assist the existing effluent treatment process and help achieve lower and better targets of COD from the same treatment plant. 


Amazon Papyrus has a range of enzymes to meet specific objectives.
Our team of professionals would work with you to select the most appropriate products to meet your specific needs.





The need for defoamers

Typical challenges associated with air in the effluent stream and surface foam includes:

  • Reduced settlement and settling rate
  • Microbiological growth due to foam deposits
  • Reduced operating capacity
  • Deposition in ETP system
  • Housekeeping/Safety
  • Poor tank level control
  • Unsightly surface foam at aeration tanks and discharge

Application areas

Defoamers are typically applied at the following areas of the ETP:

  • Clarifiers
  • Aeration ponds
  • Anaerobic digesters
  • ETP discharge 


Amazon Papyrus has a range of defoamers based on the following:

  • Surfactant concentrates
  • Fatty alcohol dispersions
  • Oil based concentrates
  • Silicone emulsions

Our team of professionals would work with you to select the most appropriate products to meet your specific needs.




Odor Control

Amazon Papyrus has proven applications and experiences in controlling odors in waste water Treatment area:

  • H2S precipitation in clarifier and sludge
  • H2S and mercaptan control in liquid phase by oxidizer / triazine
  • H2S and mercaptan control in scrubber by oxidizer / triazine
  • Odor control in atmospheric phase or in stack / chimney via spray of essential oil / fragrance
  • Odor control in sludge slurry
  • Odor control in ETP landfill via spray of polymeric layer


Our Odor control product range for waste water application comprise of:

Air phase-Odor neutralizer. The product is a proprietary formulation of several essential oils and a food grade surfactant that neutralize the unpleasant odor by reacting with the odorous chemistries and neutralize them. It is biodegradable and totally safe to people, animals, and plant life.

Fragrance. These scented versions of AmiSense provide the user with pleasant odors that suppress / substitute the unpleasant odors in the treated air. Instead of neutralizing the malodor thereby yielding no odor, these new products neutralize the malodor and leave a subtle floral / herbal / fruity scent behind.

H2S scavenger for waste water collection system, aeration pond, and Sludge slurry is the powerful neutralizer of H2S with fast acting oxidizing power that is effective over a wide pH range. It can be fed alone with simple feed equipment without addition of Sodium Hypochlorite. The reaction with H2S does not create troublesome chemistries to the process.

WWTP H2S scavenger is a metal salt coagulant for the neutralization of hydrogen sulfide odor in waste water treatment plant. This product reacts with H2S to form blackish, odorless, metallic precipitants to be carried away with the sludge. This product is very effective in neutralizing H2S because the reaction is irreversible. This prevents the odorous hydrogen sulfide from being released to the atmosphere where it is potentially lethal.

The Landfill cover treatment forms a polymeric coating that effectively reduce the landfill odor problem, while eliminate problems of dusting and erosion of top layer even under the rain. This application requires only one twentieth space compared with soil cover in normal landfill and it has lower cost than ordinary plastic cover. It can dramatically increase the landfill cost efficiency and increase the life of the landfill site. It is an environmentally friendly product and can degrade in natural conditions.

Our team of professionals would work with you to select the most appropriate products to meet your specific needs.