13:00 | 26/10/2021 Economy
(VEN) - About 157 million tonnes of agricultural by-products are churned out throughout Vietnam annually, most of which are burned or discharged into the environment, causing waste and environmental pollution. These by-products could be recycled and Vietnam needs to have proper policies to increase their efficiency.
Waste of agricultural by-products
Nguyen Thi Thien, Director of the Thai Hung Thinh Joint Stock Company, said her company has a farm in Binh Phuoc Province, part of which is raising 500 pigs per batch using biological products for waste treatment. Over the past five years, the farm has never experienced pig epidemics and related environmental pollution, Thien said. According to her, durian skins can be processed into activated carbon and wood vinegar for use in agricultural production, and farms can use coconut tree-based products and intercrop coconut with shrimp farming to increase income.
According to data from the Ministry of Agriculture and Rural Development’s Department of Livestock Production, the amounts of post-harvest agricultural by-products are large: 42.8 million tonnes of rice straw, 10 million tonnes of corn stalks, 3.6 million tonnes of vegetables and fruits, 3.1 million tonnes of cassava stalks, 3.1 million tonnes of cashews, and 6.1 million tonnes of other by-products. By-products of farm produce processing include 8.6 million tonnes of rice husks, 3.5 million tonness of bagasse, 1.4 million tonnes of corn cobs, 1.3 million tonnes of cassava skin and two million tonnes of other by-products. Only 52.2 percent of the cultivation sector’s 88.9 million tonnes of by-products are sold or purchased, while the rates of livestock, fishery and forestry sectors are 75.1, 90 and 50.2 percent, respectively.
Department of Livestock Production Deputy Director Tong Xuan Chinh said the rice straw collection, packing, transport and purchase and sale market will grow, yielding an average of VND550,000 per hectare of rice for farmers from selling post-harvest straw.
Agricultural by-products should be turned into high-value products such as dietary supplements and cosmetics
Prof. Dr. Vo Tong Xuan said collection and reuse of agricultural by-products not only helps reduce greenhouse gas emissions but also helps farmers increase income. Vietnam's seafood by-product processing industry has reached only U$275 million, and if all of the almost one million tonnes of the fishery industry’s by-products are processed into dietary supplements and cosmetics, using high technology, the revenue will probably increase to US$4-5 billion, Xuan said.
Each year, agricultural, forestry and fishery production churns out 157 million tonnes of by-products, most of which are burned or discharged into the environment. Prof. Dr. Nguyen Quang Thach, Director of the Vietnam Academy of Agricultural Sciences’ Institute of Biology says advanced technology needs to be applied to agricultural by-products processing, and the 157 million tonnes of agricultural by-products should be an extremely valuable source of raw materials and help develop a circular agriculture.
Economists say Vietnam needs to adopt policies encouraging investment in agricultural by-products processing in order to add value to agricultural products and by-products. The policies include those that encourage application of circular agricultural production processes, including open circulation – connecting different stages – and closed circulation for green growth and sustainable development. Efforts need to be made to improve the efficiency of research, development and application of technology in agricultural by-products processing, and research, development, transfer and application of advanced and clean technologies.
Tran Thanh Nam, Deputy Minister of Agriculture and Rural Development:
The agricultural sector needs to focus on fully exploiting agricultural by-products to turn them into materials for different industries, and use them to develop a circular agricultural chain.