The objective of this study was to characterize biogas production performance from the co-digestion of food waste and domestic wastewater under mesophilic (35 ± 1 °C) and thermophilic (55 ± 1 °C) conditions. The food waste used as a co-substrate in this study was collected from a main canteen at the Hatyai campus of Prince of Songkla University, Songkhla Province, Thailand. The optimum co-digestion ratio and temperature conditions in a batch experiment were selected for a semi-continuous experiment. Organic loading rates (OLRs) of 0.66, 0.33, and 0.22 g volatile solid (VS) L−1 d−1 were investigated in a semi-continuous experiment by continuously stirring a tank reactor (CSTR) for biogas production. The highest biomethane potential (BMP, 0.78 ml CH4 mg−1 VS removal) was achieved with a ratio of food waste to domestic wastewater of 10:90 w/v at a mesophilic temperature. An OLR of 0.22 g VS L−1 d−1 of co-digestion yielded positive biogas production and organic removal. The findings of this study illustrate how biogas production can be used for operating feed conditions and control for anaerobic co-digestion of domestic wastewater and food waste from a university canteen.

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The aim of this research was to define the performance of rubber glove products manufactured from concentrated latex using eco‐efficiency. Data were collected from two concentrated latex and two rubber glove industries between 2009 and 2011 for the case study to define the eco‐efficiency by comparing product values and environmental impact indicators. Eco‐efficiency trends of rubber glove products manufactured using concentrated latex production were analyzed using a snapshot graph. The results indicated that the highest and lowest eco‐efficiency values of rubber glove products manufactured from concentrated latex were waste production and energy consumption, respectively. Eco‐efficiency trends of rubber glove products manufactured from concentrated latex pertaining to material consumption, energy consumption, chemical consumption, and waste production were observed as being half eco‐efficient. In addition, the hotspot of high environmental burden of rubber glove products manufactured from concentrated latex was found to be in the process of manufacture. The definition of eco‐efficiency values and trends for rubber glove products manufactured from concentrated latex mentions that energy and chemical consumptions cause dominant environmental problems. Therefore, the master approach to eco‐efficiency enhancement of rubber glove products manufactured from concentrated latex developed with the four case study industries were as follows: (1) the load factor use of electricity per month, (2) increasing measurements of reduction in energy efficiency in the office concerning concentrated latex process, and (3) the installation of the production line using latex glove processes. © 2015 American Institute of Chemical Engineers Environ Prog, 35: 802–808, 2015

The objective of this study is to estimate the tourist behavior of plastic waste reduction in the coastal area of Trang Province, Thailand. 316 tourists (153 male, 163 female) traveling in the five districts along with the coastal area were included as the participants in this study. The results showed that 57 % of the tourists were found to be good behavior. Amongst 14 variables in statistic analysis, knowledge was found as significant predictor after adjusting in full model of multiple logistic regression. The knowledge compain of plastic waste reduction ought to be promoted to increase of awareness among tourists for reducing plastic waste problem in the coastal area at early age. A greater emphasis must be placed on formulation and implementation of policies aimed at addressing the emerging problems of plastic waste in the costal area of Thailand.

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