What is Wastewater Management and Recovery from the Fish Industry?
Following the rapid growth of the world population and the resulting quick increase in urbanisation and industrialization, fisheries and aquaculture production has increased dramatically, owing primarily to advancements in fishing technology. As a result, there has been a significant increase in the amount of fish waste produced around the world and it is believed that roughly two-thirds of all fish is discarded as garbage, posing significant economic and environmental implications. As a result, the disposal and recycling of these wastes has become a critical issue that must be addressed.
Waste generated from the Fish or Sea food Sector
During the manufacturing of seafood, huge amounts of wastes are generated, particularly brine, which is particularly difficult to handle. We'll start with the most prevalent sorts of waste:
1: Liquid Waste Management.
Organic material with a high proportion of proteins, salts, lipids, and other suspended materials makes up the majority of liquid waste. Due to the massive amounts of water required in manufacturing operations, liquid fluxes are typically high.
Bloody water, wash waters from cutting stages, gutting and filleting, pulp pressing (in frozen fish), packing and cooking, other liquid waste from cooking processes, cooling waters, and waters from the plant's cleaning operations are the most common types of liquid waste.
2: Solid Waste Management.
The creation of solid waste is equally important. It is prepared and delivered for animal feed by certain industries, returned to the ocean by others, and sent to reduction plants by others.
The cutting and gutting stages create the majority of the solid waste, which consists of heads, tails, and intestines. Because fishmeal manufacturers repurpose this waste as basic materials, landfill disposal is limited.Intestines and shells are created in canned seafood, which can be used as well.
What is Zero-Liquid Discharge (ZLD)?
Zero Liquid Discharge or ZLD is a term used when there is no liquid discharge. All water is collected and impurities are converted to solid waste in an approach to water treatment. While many water treatment methods aim to maximize freshwater recovery while minimizing waste, it is the most difficult to achieve since the expense and difficulty of recovery rises as the wastewater becomes more concentrated. Salinity, scaling chemicals, and organics all have higher concentrations, which adds to the costs of handling them. Thus, ZLD is done by connecting water treatment technologies that can treat wastewater as contaminants become more concentrated.
What are the advantages of Zero Liquid Discharge for Fish and sea food sector?
Targeting zero liquid discharge for an industrial process or facility has a variety of advantages:
1: Waste management costs are reduced when waste volumes are reduced;
2: It leads to reduced water purchase expenses and risks by recycling water on-site. When compared to treating to fulfil severe environmental discharge criteria, recycling on-site can result in reduced treatment demands;
3: It reduces the number of trucks used for off-site wastewater disposal, as well as the greenhouse gas emissions and risk of neighbourhood traffic accidents;
4: Environmental performance is improved.
Recycling, recovery and reuse of waste generated in Fish food sector
It's important to note that wastewater can be used for other purposes without the need for treatment in the fish food sector_
1. Reuse of waterin Fish food sector
• Using wash water in subsequent washing cycles. For example, in the start of the process, less polluted or unclean effluent from the plant can be utilized for cleaning activities.
• Water from the autoclave cooling operation in the canning process can be used to clean equipment and plants.
2. Waste Recovery as By-Productsin Fish food sector
• Fish and seafood waste can be used in the production of preserves and/or animal feed.
• The use of fish and seafood waste in the production of fishmeal for animal feed.
• Depending on the volume of effluents, recovery of solids and fats from effluents via centrifugation, separation, or concentration followed by dehydration for use in animal feed formulae.
• Shells from shellfish are used in the development of novel products, such as calcium meal.
3. Waste recovery and treatmentin Fish food sector
•Extracting and concentrating Omega-3 rich proteins and lipids from commercialization is a new treatment method. Ultrafiltration membranes and vacuum evaporation equipment work together to achieve this.
• Spray drying is used to extract protein meal and oleic fatty acids, both of which have a high market value.
•The salt content of the residual water is frequently high. It can be treated with evaporation-crystallization equipment to produce a clean effluent that complies with requirements and, depending on the manufacturer, can be reused.
•Lime produced as a result of this procedure can be used for roadway de-icing and industrial purposes.
Conclusion_
Fish waste is not only a big environmental issue, but it also represents a significant financial loss.As a result, better fish waste management is required to address these critical challenges. Now-a-days, the creation of a sustainable fish waste management system is critical, as it strives to reduce waste generation as much as possible and to reuse, recycle, and recover the waste generated. In this way, the usage of fish by-products could aid in the development of high-value commercial items and, as a result, economic growth.
Netsol Water can help you recover wastewater and waste and transform it into high-value commercial products, all while avoiding liquid discharge, thanks to our experts and be-fitting technologies.
Contact our team now to learn more about how we can assist with your wastewater treatment options or to discuss your specific requirements for re-use and recycle. Make a phone-call at +919650608473 or contact via email at enquiry@netsolwater.com for further consultation or product purchase related query.
