Zero Liquid Discharge & ZLD plant manufacturer in India

Goldfinch Evaporators is a zero liquid discharge, ZLD Plant manufacturer in India. It is truly an advanced system of wastewater treatment, which provides a gainful extraction of water and delivers solid waste in concentrated form for a disposal-zero liquid discharge (ZLD) plant. It encompasses provisions for multiple processes, such as reverse osmosis, evaporation, and crystallization, into its water recycling activity to achieve proper closed-loop installation.

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Goldfinch Evaporation Systems has executed numerous projects such as Multiple Effect Evaporator (MEE), Mechanical Vapour Recompression Evaporators (MVRE), and Salt recovery systems across India and internationally.

Many of our projects involve complex wastewater compositions containing various salts and organic compounds, as well as process effluents and RO reject streams.

We operate our own manufacturing facility spanning 10,000 square feet for the fabrication of Heat exchangers and pressure Vessels ensuring quality control and timely delivery.

Goldfinch provides total thermal and nonthermal ZLD solutions to handle difficult-to-treat wastewaters. Goldfinch’s proprietary evaporators, brine concentrators, and crystallizers can assist in recovering over 95% of your wastewater while reducing the remaining brine as a product or solid.

Zero Liquid Discharge Helps Plants Meet Water Reuse Needs

Industries Benefiting from ZLD Plants

ZLD technology is particularly beneficial in industries with complex wastewater needs, such as

Zero Liquid Discharge water treatment aims at maximizing the water recovery and zero production of liquid waste. The ultimate treatment process has zero or nearly zero adverse environmental impact.
1)Pre-treatment - reducing TSS, COD, and Turbidity to filter out particle impurities or precipitation of sparingly soluble compounds to allow additional treatment.

2) Dissolved solids concentration - by membrane technologies, either by a combination of reverse osmosis (RO) with electrodialysis (EDR). Method of concentrating the brine of the RO process with EDR or single-step EDR. More than 98 % of the recoverable products using these technologies concentrate the stream.

3) Thermal treatment - final stage typically would be an Evaporator/Crystallizer to form solids. Final evaporation of water remaining available for reuse combined with precipitation of solid waste that may be sold as a valued product (such as pure NaCl Na2SO4, etc.) for landfill disposal in controlled environment

Types of Wastewater Treated

Describe Zero Liquid Discharge and Explain Its Significance

Zero liquid discharge is an engineering approach to water treatment that recovers all of the water and converts contaminants into solid waste. While many water treatment processes try to maximize the recovery of freshwater and minimize waste, ZLD is the most demanding target because the cost and challenges of recovery increase as the wastewater gets more concentrated. The concentrations of organics, scaling chemicals, and salinity all rise, and regulating these increases comes with additional expenses. ZLD is accomplished by combining water treatment technologies that can handle wastewater with concentrated pollutants.

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Contact Us for Key Benefits of a ZLD Plant

Targeting ZLD for an industrial process or facility offers several benefits

Lower waste volumes decrease the cost of waste management.
Recycling water on-site reduces water acquisition costs and risks. Recycling on-site can also lead to fewer treatment needs, versus treating to meet stringent environmental discharge standards.
Reduce the number of trucks involved in off-site wastewater disposal, the greenhouse gas emissions they cause, and the likelihood of incidents on local roads.
Enhance the environmental performance and regulatory risk profile for future permitting.
Some processes will recover valuable resources, such as ammonium sulfate fertilizer or sodium chloride salt for ice melting.

Many of the waste management technologies are considered ZLD, but they apply various boundaries to delineate where the discharge occurs. Typically, the border or 'boundary condition' is the facility or site property line that contains the industrial process, and the wastewater must be treated, recycled, and converted to solids for disposal to achieve zero liquid discharge.

Some facilities consider liquid waste that is sent off-site for treatment, deep well disposal, or incineration to be ZLD. This method reduces the continual release of liquids into surface waters or sewers, although it can greatly raise costs.

Some engineers refer to their systems as near-ZLD or minimal liquid discharge to emphasize that they release low levels of wastewater; nonetheless, these procedures do not eradicate liquid from their waste. For some sites, concentrating brine to lower volumes may be more cost-effective than achieving complete ZLD. Furthermore, it may be possible to eliminate the generation of liquid waste on-site by practicing rigorous water conservation or removing contaminants at their source before they join the main flow of water.

Why is Zero Liquid Discharge Important?

In a world where freshwater is becoming an increasingly precious resource, industrial processes pose two threats to its supply unless it is treated. Many industrial operations require water, which reduces the availability of water for the environment or other processes, or contaminates and releases water, causing damage to the local ecosystem.

Although this history of tighter regulations on wastewater discharge can be traced back to the US Government's Clean Water Act of 1972, India and China have been leading the drive for ZLD regulations in the last decade. Because many of their major rivers are badly polluted with industrial wastewater, both countries enacted ZLD rules. They found that safe water supplies in the future can best be protected by protecting rivers and lakes from pollution. In Europe and North America, high costs of wastewater disposal at inland facilities have driven the drive for ZLD.

These costs are both caused by regulations that influence the options for disposal and other factors that affect the cost of disposal technologies. Tong and Elimelech suggest that "as the severe consequences of water pollution are increasingly recognized and attract more public attention, stricter environmental regulations on wastewater discharge are expected, which will push more high-polluting industries toward ZLD.

Another key motivation to adopt ZLD is the recovery of resources that exist in wastewater. Some companies aim for ZLD as part of their waste treatment due to the possibility of selling the produced solids or reusing them in their industrial process. For instance, lithium has been extracted from oil field brines in the USA at a nearly comparable level to South American salary. Another example is the recovery of gypsum from mine water and flue gas desalination (FGD) effluent, which is then sold for use in drywall manufacturing.

Regardless of the reason an organization targets ZLD, achieving it proves good economics, corporate responsibility and environmental stewardship. Operating a ZLD in-house plant saves on disposal costs, more water is reused and fewer greenhouse gases are produced through off-site trucking, hence minimizing impact on local ecosystems and climate.

The Zero Liquid Discharge System's Essential Elements

Leading ZLD Plant Manufacturer in India

We have been able to create tailored ZLD plants that achieve best-in-class performance by using years of experience in understanding important client concerns. As one of the leading ZLD plant manufacturers in India, our plant offers several practical benefits like,

High Water Recovery: Our ZLD plants are designed to achieve maximum water recovery from the wastewater streams.

Energy Efficiency: It consumes minimum energy during, evaporation, crystallization and final drying process.

Scalability: They are adaptable to the changing needs of the industry. It can be tailored to meet rising production levels, changing effluent qualities, and different discharge criteria.

Robustness: The MOC employed is robust and reliable, capable of running continuously with little downtime.

Sustainability: We constructed our ZLD plant with sustainability in mind.

Cost-effective: Our ZLD plants have reduced running costs. They are created with a thorough awareness of the economic advantages of water recovery and waste reduction.

Compliance with Regulations: Our plants follow all applicable environmental regulations and standards, such as discharge limitations, water quality requirements, and air emissions standards.

Safety: We always keep safety in mind.

Leading Goldfinch Evaporators by ZLD Solutions

Zero liquid discharge plant technology is gaining popularity worldwide as an important wastewater management approach for reducing water pollution and increasing water availability.

The primary benefits of ZLD are:

Minimizes wastewater discharge.
Maximizes water recovery.
Create a valuable product for sale.
Removing environmental issues.
Reduction in reliance on local water supplies and legislation.

ZLD technology is extremely useful in businesses with complex wastewater requirements, including

- Pharmaceuticals: For water reuse during manufacture.

- Cosmetics and personal care: Reducing waste during product formulation processes.

- Textiles and Dyestuffs: Treatment of highly colored, chemically intense effluent.

- Glue, Adhesives, and Detergents: Water treatment using organic and synthetic substances.

- Pesticides and herbicides: Filtration of hazardous effluents to ensure safe disposal or reuse.

Leading Goldfinch Evaporators by ZLD Solutions

Wastewater Constituents

For the successful design and operation of a zero-liquid discharge system, careful consideration of wastewater chemistry is required. A sound water chemistry design basis is essential for successful zero liquid discharge design.

The chemical elements of concern for a zero liquid discharge system are usually as follows:

ZLD Treatment Process Stages

ZLD Treatment Stages 1

Preliminary Treatment
Effluent Screening Process
Oil Removal Process
Effluent Mixing Process
pH Correction Process

ZLD Treatment Stages 2

Electrochemical Coagulation and Flocculation Process
Primary Sludge Settling, treatment process.
TSS, Color & Associated BOD/COD Removal Process.
Hardness & heavy metals removal process.

What components make up a basic ZLD treatment system?

The specific components of a ZLD treatment system will depend on the volume of dissolved material present in the waste, the system’s required flow rate, the system’s required flow rate, and what specific contaminants are present. However, in general, a basic ZLD treatment regimen usually comprises some form of:

Metals, hardness, and silica can be precipitated out using a clarifier and/or reactor.

chemical feed to aid the process of any precipitations, flocculation or coagulations of all suspended solids and metal concentration filter press with pre-treatment or integrated within the unit with the evaporator.

UF will remove residual suspended solids remaining, thus protecting downstream equipment against fouling, scaling, or corrosion.

The primary steps of concentration use reverse osmosis (RO) to remove the majority of dissolved solids from the water stream.

brine concentrators to further concentrate the rejected RO stream or reject from electrodialysis to further reduce waste volume.

evaporator for vaporizing access water in the final stages of waste concentration before the crystallizer.

Use a crystallizer to boil off any leftover liquid, resulting in a dry, solid cake for disposal.

Our Projects

Multi-Effect Evaporator Manufacturer in India

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FAQs | Zero Liquid Discharge (ZLD)

What exactly is ZLD or zero liquid discharge?

Zero Liquid Discharge (ZLD) is an advanced water treatment technology that assures the total containment of wastewater within industrial processes. In place of discharging any liquid effluent, all the waste water is treated, cleared, and re-used resulting in the disposal of only the solid wastes. ‘W’ in wastewater stands for water that is wasted and needless once again except for disposal of the waste. Therefore, Goldfinch Evaporators help industries manage water usage pragmatically by providing a ZLD system.

For industrial applications, why is ZLD significant?

In businesses where little wastewater discharge is required due to water scarcity or strict environmental laws, ZLD systems are essential. Our ZLD systems at Goldfinch Evaporators help businesses comply with regulations, use less water, and have a less negative impact on the environment, all of which contribute to a more sustainable operation.

How does Goldfinch Evaporators' Zero Liquid Discharge (ZLD) method operate?

The multi-step ZLD method used by Goldfinch Evaporators begins with the pre-treatment of wastewater to get rid of impurities. The water is evaporated, condensed, and separated throughout a series of evaporation stages, such as Multiple Effect Evaporators (MEE) or Mechanical Vapor Recompression Evaporators (MVRE). Complete water recovery with little waste is ensured by collecting the remaining solids as sludge.

What are the advantages of Goldfinch Evaporators' ZLD systems?

The ZLD systems from Goldfinch Evaporators have several advantages, such as total water reuse, adherence to environmental standards, lower wastewater disposal expenses, and preservation of natural water supplies. Our solutions are built to be highly dependable and efficient, offering industry economic benefits and long-term sustainability.

Which industries can benefit from Goldfinch Evaporators’ ZLD solutions?

A wide range of industries, including power generation, chemical manufacturing, pharmaceuticals, textiles, and food processing, can benefit from Goldfinch Evaporators’ ZLD solutions. Our systems are customized to handle different types of industrial effluents, helping each sector achieve its water treatment goals.

What are the guarantees to the efficiency of the ZLD systems offered by Goldfinch Evaporators?

To ensure ZLD system efficiency, above and beyond the use of cutting-edge equipment and quality materials, and constant monitoring of the system, is a robust system of checks and controls. The Mechanical Vapor Recompression Evaporators (MVRE) and Multiple Effect Evaporators (MEE) we manufacture are technical innovations that work with low energy consumption and high water recovery rates thus complimenting our investment in ZLD systems.

Are Goldfinch Evaporators ZLD systems adaptable?

Undoubtedly, Goldfinch Evaporators offers fully tailored ZLD solutions to meet specific needs of all clients. To achieve optimal results along with environmental compliance, our team assesses the specific requirements of your industry before adjusting the ZLD system.

What sets aside Goldfinch Evaporators as the technology leader in ZLD systems?

Our skill in the design and installation of advanced evaporator models, including Multiple Effect Evaporators (MEE) and Mechanical Vapor Recompression Evaporators (MVRE) makes us a ZLD system technology leader. We are a trusted partner for companies and enterprises seeking effective ZLD solutions in any part of the globe thanks to our strict adherence to quality and innovation as well as environmental concerns.