Zero Liquid Discharge (ZLD) Systems for Industrial Wastewater Treatment in India

Industrial Zero Liquid Discharge by GreenPebble Technologies

GreenPebble Technologies specializes in the design and implementation of Zero Discharge (ZLD) systems for industrial Effluent Treatment Plants (ETP).

Our ZLD system caters to complex and high-strength industrial applications, utilizing a multistage membrane filtration - involving a biological system to remove COD and BOD, a tertiary multistage NF+RO system to recycle wastewater and a brine minimization step to recover RO concentrate, followed by thermal evaporation.

We offer customized effluent reuse solutions that ensure strict compliance with discharge regulations. Our ZLD solutions deliver consistent treated water quality, a compact plant footprint, and operational stability across various industrial applications.

Membrane Bioreactor System

Forward Osmosis

Membrane Distillation

Zero Liquid Discharge (ZLD) Process Step and Features

GreenPebble Technologies' Zero Liquid Discharge or ZLD focuses on recycling and reusing almost all wastewater and leaves almost no liquid waste for disposal.

Industries need ZLD to meet strict discharge norms, reduce fresh water use, and protect local water sources. Our ZLD systems are designed to recover maximum water with low energy use and simple unit operations. The focus is on compact process design by incorporating advanced membranes that reduce operating costs over time. This helps industries improve sustainability, meet ESG goals, and maintain long-term compliance without creating financial stress.

Main advantages of GreenPebble's ZLD system is as follows:

- compact and simple operational footprint

- excellent quality recovered water

- reliable operation

- modest cost of ownership, improving productivity

- energy-efficient process operations

ZLD using Brine Minimization and Features

ZLD process integrates secondary, tertiary and brine minimization membrane processes for industrial effluent treatment plant.

Capacity: 5 to 500 m3/day
Material of Construction: uPVC, Carbon Steel, SS304 or SS316 (depending on treatment stage)
In-built Antifouling and Antiscaling Properties
(Semi)Automatic Plant Operations
Enhanced Tolerance Against Harsh CIP Chemicals
"Best in Class" for Membrane Life
High Energy-Efficiency and Low Cost of Ownership
Modular Configuration with Quick Deployment

ZLD Technical Specifications

Capacity: 5 to 500 m3/day ZLD system

Material of Construction: uPVC, SS304/SS316 or Carbon Steel

Antiscaling and Antifouling Membrane System

(Semi) Automatic System with PLC & SCADA

In-built CIP, and Backwash System

Secondary Treatment (Biological Treatment using MBR)

Influent COD typically 1500 to 30000 mg per litre
Effluent COD target below 250 mg per litre
BOD removal 90 to 95 percent
Hydraulic retention time 6 to 24 hours
Dissolved oxygen maintained at 2 to 3 mg per litre
Solid liquid separation

MBR System

Membrane Bioreactor System
1. MBR pore size 0.04 to 0.1 micron
2. Operating flux 12 to 25 LMH
3. Produces low-turbidity treated water

Tertiary Treatment and Brine Minimization

Maximise water recovery and concentrate dissolved salts.

Key steps and specifications

Ultrafiltration or Nanofiltration System
1. Turbidity below 1 NTU
2. SDI below 3
3. Cartridge filtration 1 to 5 micron
Further Wastewater Recovery using Multistage RO and FO-MD System
1. Primary RO recovery 65 to 75%
2. High recovery FO-MD up to 90-95%
3. Salt rejection above 98%

Proper design at these stages reduces fouling, lowers operating cost, and improves overall ZLD reliability.