Food residue recycling by swine breeders in a developing economy: A case study in Da Nang, Viet Nam

Kato, Takaaki; Pham, Dung; Hoang, Hai; Yang, Xue; Tran, Quang Van

doi:10.1016/j.wasman.2012.07.015

Cited by 11 publications

(8 citation statements)

References 7 publications

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“…Da Nang is subdivided into eight districts: six urban districts (Cam Le, Hai Chau, Thanh Khe, Lien Chieu, Nguyen Chieu, Ngu Hanh Son, and Son Tra) and two rural districts (Hoa Vang and Hoang Sa). It is further subdivided into one commune-level town, 14 communes, and 45 wards [26,27].…”

Section: Description Of the Study Sitementioning

confidence: 99%

Food Waste in Da Nang City of Vietnam: Trends, Challenges, and Perspectives toward Sustainable Resource Use

Pham

Tran

et al. 2021

Sustainability

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Food waste has become a critical issue in modern society, especially in the urbanized and fast-growing cities of Asia. The increase in food waste has serious negative impacts on environmental sustainability, water and land resources, and food security, as well as climate and greenhouse gas emissions. Through a specific case study in Da Nang City, Vietnam, this paper examines the extent of food waste generation at the consumption stages, the eating habits of consumers, food waste from households and service establishments, as well as prospects for the reuse of food waste as pig feed. The results of this study indicate that per capita food waste generation in Da Nang has increased from 0.39 to 0.41kg in 2016, 0.46 in 2017, and reached 0.52kg in 2018. According to the results of our consumer survey, 20% of respondents stated that they often generate food waste, 67% stated they sometimes do, and 13% stated they rarely do. Furthermore, 66% of surveyed households stated that their food waste is collected and transported by pig farmers to be used as feed for pigs. The use of food waste as feed for pigs is a typical feature in Da Nang. The study also found that there is a high level of consumer awareness and willingness to participate in the 3Rs (reduce, reuse, recycle) program, which was being initiated by the city government. In service facilities such as resorts and hotels, daily food waste reached 100–200 kg in large facilities and 20–120 kg in small facilities. This waste was also collected for use in pig farming. However, there has been a fall in demand for pig feed in line with a decrease in the number of pig farms due to the African swine fever epidemic that occurred during the implementation of this study. This paper suggests that there is a strong need to take both consumer-oriented waste prevention and waste management measures, such as waste segregation at source and introduction of effective food waste recycling techniques, to ensure that food waste can be safely and sustainably used as a “valuable resource” rather than “wasted.”

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Section: Description Of the Study Sitementioning

confidence: 99%

Food Waste in Da Nang City of Vietnam: Trends, Challenges, and Perspectives toward Sustainable Resource Use

Pham

Tran

et al. 2021

Sustainability

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show abstract

“…We measured the weight of food waste collected by each farm for nine days, and conducted face-to-face interviews on each farm in 2011. Details of the selection and survey procedure for these farms were described by Kato et al (2012). The 2016 survey targeted the same 30 farms, and for this survey, first we contacted the farmers by telephone to confirm that they continued swine farming, and then we visited the farms that agreed to answer our follow-up survey, and conducted face-to-face interviews.…”

Section: Survey Proceduresmentioning

confidence: 99%

“…In 2011, it was estimated that 26.3 metric tons of organic waste were recycled every day. This was equivalent to 4.1% of the waste collected by the city's public waste management company each day (Kato et al, 2012). The collected food waste was used to feed pigs in suburban farms.…”

Section: Introductionmentioning

confidence: 99%

“…Transactions of food waste were performed via a commercialised network of collection from food businesses. This network also contained two types of households: in most, food waste was voluntarily separated and submitted to collectors free of charge whereas in the others, remuneration was received for submitting food waste (Kato et al, 2012). We conducted follow-up surveys in the city to examine whether there was any change in the structure of this collection system in response to subsequent economic development.…”

Section: Introductionmentioning

confidence: 99%

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Economic development and human ties in informal food waste recycling: A follow-up study in Da Nang, Vietnam

Kato

Hoang

2020

Waste Manag Res

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This study examined the effects of economic development on the commercialised and non-commercialised segments of informal food waste recycling in Da Nang City, Vietnam. Food waste was collected from the urban centre and used as pig feed in swine farms in suburban areas. The commercialised and non-commercialised segments of this system have evolved differently over time. During our observation period of 2011–2016, swine farmers became concerned about economic efficiency, which affected the manner in which they used food waste. By 2016, more farmers had begun to use food waste brokers instead of collecting food waste themselves so that they could concentrate on rearing pigs. The price of food waste remained low, reflecting the farmers’ need for low-cost feeding. This resulted in the closure of commercialised transactions between households and waste collectors amid increased household income. Instead, non-commercialised transactions supported by human ties became the main mode of household participation in food waste recycling . Our findings can guide the use of different elements in this informal recycling system within the framework of a formalised recycling system implemented by the government.

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“…Our survey team then separated the garbage from each vendor into 12 categories and recorded the wet weight of each category ( Table 2). Swine breeders in Da Nang City extensively and informally recycle food residue [9]. We separated organic waste into two categories (feedable and not for feed; Table 3) to estimate the potential amount of waste usable for swine feed.…”

Section: Waste Quantity and Composition Surveymentioning

confidence: 99%

Waste generation in traditional organized bazaars: a case study of organic waste sources in Da Nang City, Viet Nam

Kato

Tran

Hoang

2015

J Mater Cycles Waste Manag

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Traditional organized bazaars are important retail venues in Viet Nam, but there are concerns about their waste management programs. This study examined five organized bazaars in Da Nang City, Viet Nam, to provide baseline data for improving bazaar waste management. We focused on vendors that produce organic waste and summarized the quantity and composition of waste obtained from ten typical merchandise categories. There were notable differences in the waste quantities and composition between the waste obtained from merchandise categories and bazaar locations. Fish and vegetable vendors and food stalls are major sources of organic waste that can be used for local swine breeding. Overall, introduction of source separation was negatively viewed among vendor clerks. However, it is possible that a small reduction in the garbage collection fee, which is linked to the introduction of source separation, would change their attitudes.

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Food residue recycling by swine breeders in a developing economy: A case study in Da Nang, Viet Nam

Cited by 11 publications

References 7 publications

Food Waste in Da Nang City of Vietnam: Trends, Challenges, and Perspectives toward Sustainable Resource Use

Food Waste in Da Nang City of Vietnam: Trends, Challenges, and Perspectives toward Sustainable Resource Use

Economic development and human ties in informal food waste recycling: A follow-up study in Da Nang, Vietnam

Waste generation in traditional organized bazaars: a case study of organic waste sources in Da Nang City, Viet Nam

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