Seafood Waste Management Status in Bangladesh and Potential for Silage Production

Abstract

Frozen shrimp and fish are the second most valuable export items from Bangladesh. Thus, in processing industries, a considerable amount of seafood waste is produced every year. Neglecting seafood waste leads to serious forms of wastage. The purpose of this survey-based study was to estimate the amount of seafood waste produced and understand the existing waste management practices in Bangladesh. Potential for seafood waste-based silage production and its utilization were also studied. Across the seafood industry, around 43,321 tons of seafood waste are produced every year. The highest amount of seafood waste is produced in Khulna, followed by Chittagong, Cox’s Bazar, Dhaka, and Sylhet. Local people consume a portion of fresh shrimp carapace and heads and gills of large fish. A portion of seafood waste is also used to feed aquaculture species. Moreover, parts of dried shrimp shells, appendages, and fish scales, air bladders, and fins are exported to some Asian countries. The prospect of fish silage production constitutes a promising new development for animal feed production in Bangladesh. The availability of waste materials from seafood processors and the demand from feed millers favor the conditions for silage production. However, in order for the seafood waste-based silage industry to flourish, the establishment of supply chains for seafood waste and end products (silage) is required. Studies on growth performance, muscle quality, and digestibility of animal feed with silage-based diets are required for farmed species.

Production of biomaterials from seafood waste for application as vegetable wash disinfectant

“…In 2020, a Thai survey estimated oyster and white shrimp cultivation to be about 27,730,000 kg and 132,000 kg, respectively ( Fisheries Statistics of Thailand, 2021 ). The rising consumption rate has resulted in the accumulation of shell wastes on the coast ( Martins et al., 2017 ) and shrimp shells in large quantities, causing environmental pollution problems ( Huang et al., 2020 ; Islam and Peñarubia, 2021 ). However, such wastes can be utilized because they contain crucial components such as calcium carbonate (CaCO 3 ) in tropical oyster shells and deacetylated chitin from shrimp shells.…”

How value addition by utilization of tilapia processing by‐products can improve human nutrition and livelihood

“…By‐products of fish were traditionally considered to be of low value and as a waste product contributing to environmental problems. The ever‐increasing production of these processing by‐products without utilization was resulting in environmental pollution 11–14 . Inappropriate waste management causes environmental pollution leading to breeding grounds for insects and vermin, thus, posing significant public health risks.…”

“…Inappropriate waste management causes environmental pollution leading to breeding grounds for insects and vermin, thus, posing significant public health risks. Consequently, waste management is coming under strict regulations due to environmental issues and has become an increased cost burden for the seafood industry 12 . However, by‐products of fish processing provide a good source of macro‐ and micronutrients and can be converted into a variety of products including fishmeal and oil, fish hydrolysates, fish collagen, fish sauce, fish biodiesel and fish leather, but also nutritious food products.…”

“…The ever-increasing production of these processing by-products without utilization was resulting in environmental pollution. [11][12][13][14] Inappropriate waste management causes environmental pollution leading to breeding grounds for insects and vermin, thus, posing significant public health risks. Consequently, waste management is coming under strict regulations due to environmental issues and has become an increased cost burden for the seafood industry.…”

“…Consequently, waste management is coming under strict regulations due to environmental issues and has become an increased cost burden for the seafood industry. 12 However, by-products of fish processing provide a good source of macro-and micronutrients and can be converted into a variety of products including fishmeal and oil, fish hydrolysates, fish collagen, fish sauce, fish biodiesel and fish leather, but also nutritious food products. The utilization of byproducts has several environmental and economic benefits as well as the possibilities to produce more food from limited resources.…”