Zero Liquid Discharge (ZLD) System

At SRP Engineering & Tech, we offer Turnkey Zero Liquid Discharge (ZLD) system that are specifically engineered to deliver high efficiency and reliability. Our comprehensive ZLD solutions are ideal for industries such as chemical, pharmaceutical, textile, and food processing, where water recovery and waste minimization are critical.

A Zero Liquid Discharge (ZLD) system is an advanced water treatment solution designed to recover and recycle all the wastewater from industrial processes, ensuring zero discharge into the environment. By incorporating a combination of innovative technologies, a ZLD system helps industries meet stringent environmental regulations while reducing water consumption, lowering disposal costs, and contributing to sustainable operations.

ZLD Solution by SRP Engineering and Tech

Our ZLD system consists of a series of interconnected process units, each playing a crucial role in treating and recovering water. The key components include:

1. Effluent Treatment Plant (ETP)

The first step in the ZLD process is the Effluent Treatment Plant (ETP), which focuses on the primary treatment of wastewater to remove contaminants like suspended solids, oils, and heavy metals. The ETP includes physical, chemical, and biological treatment processes, such as:

  • Coagulation and flocculation to remove suspended solids
  • Activated sludge process for organic matter removal
  • Chemical dosing systems for heavy metal precipitation and neutralization

After treatment, the effluent water is pre-treated to meet the required standards before further processing in the ZLD system.

2. Stripper System

The Stripper System is employed to remove volatile organic compounds (VOCs) or solvents from the treated effluent. In this unit, heat or steam is used to volatilize the organic components, which are then separated from the water. The resulting clean water can be directed to further treatment stages, while the volatile contaminants are condensed for reuse or safe disposal. This step plays a crucial role in ensuring that the remaining effluent is free from harmful chemicals.

3. Evaporation System

The Evaporation System is designed to further concentrate and recover water from the treated effluent. The process involves the use of thermal energy to evaporate water, leaving behind concentrated waste, which is suitable for further treatment or disposal. Our Multiple Effect Evaporators (MEE) are highly efficient in recovering large volumes of water with low energy consumption, making them an ideal choice for ZLD systems.

4. Agitated Thin Film Dryer (ATFD)

The final step in the ZLD process is the Agitated Thin Film Dryer (ATFD), which plays a key role in handling the concentrated waste generated from the evaporation process. The ATFD uses a rotating film of concentrated waste on a heated surface to facilitate rapid drying, converting the liquid into a dry solid or slurry form. This ensures minimal waste generation, making disposal safe and environmentally friendly.

The ATFD also helps recover any remaining solvent or volatile components, ensuring complete recovery and minimizing waste disposal.

Pressure Range: Full Vacuum / Atm. / Under Pressure

Offered MOC: SS304L, SS316L, SS310, Duplex / Super Duplex Stainless Steel, Hastelloy C22 & C276, Mild Steel and any specific as per process requirement etc.

  • Water Conservation: Achieves 100% recovery of process water, reducing the need for fresh water intake and lowering operational costs.
  • Environmental Compliance: Helps industries comply with stringent environmental regulations regarding wastewater discharge.
  • Waste Minimization: Significantly reduces the volume of waste generated by converting liquid waste into solid or sludge form for easier disposal or further treatment.
  • Sustainable Operations: Contributes to sustainability by reducing industrial water consumption and preventing contamination of natural water bodies.
  • Pharmaceuticals: Recovery of solvents used in the manufacturing of active pharmaceutical ingredients (APIs) and drug formulations.
  • Chemicals: Recovery of solvents used in chemical synthesis, extraction, and purification processes.
  • Food & Beverage: Extraction and purification of food additives, flavoring agents, and essential oils.
  • Printing & Coatings: Recovery of solvents used in ink production, coating, and printing processes.
  • Petrochemicals: Recovery of hydrocarbons and solvents used in refining and petrochemical production.
  • Environmental Management: Treatment of waste solvents from industrial processes and recycling of valuable chemicals.