{"title":"Biodegradation of poly(lactic acid), poly(hydroxybutyrate-co-hydroxyvalerate), poly(butylene succinate) and poly(butylene adipate-co-terephthalate) under anaerobic and oxygen limited thermophilic conditions","authors":"J. Boonmee, C. Kositanont, T. Leejarkpai","doi":"10.14456/ea.1473.13","DOIUrl":"https://doi.org/10.14456/ea.1473.13","url":null,"abstract":"","PeriodicalId":39663,"journal":{"name":"EnvironmentAsia","volume":"9 1","pages":"107-115"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66672642","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The chronic effects of air pollution in school children living near industrial sites were investigated. There spiratory symptoms of 806 school children aged 9-12 years were examined by the American Thoracic Society’s Division of Lung Diseases (ATS-DLD-78-C) questionnaire during February-August 2013. The selected elementary schools in this survey was based on the distance from Map Ta Phut Industrial Estate, area A within 1 km., area B 5 km. and area C 10 km. Logistic regression techniques were used to assess the association between prevalence of respiratory symptoms and independent variables. The average 24 hrs PM10 and VOCs concentrations from 2011-2014 in area A were significantly higher than in area C (p<0.05). Relatively, the prevalence of respiratory symptoms in area A were high with odds ratios (OR) = 3.41, (95% confidence intervals (CI) = 1.70-6.85) and in area B with OR = 1.36, (95% CI = 0.54-3.45), in comparison to area C. The prevalent of non-specific respiratory diseases (NSRD) and Persistent Cough and Phlegm (PCP) in boy student were higher than girls students with OR=2.17, (95% CI=1.33-3.53), whereas those factors such as age, residential years, home size, parental smoking habits, use of air conditioners and domestic pets were not associated. Exposure to particulate matter and volatile organic compounds arising from Industrial sites was associated with worse respiratory impairments in children.
研究了空气污染对工业场所附近学龄儿童的慢性影响。采用2013年2 - 8月美国胸科学会肺病科(ATS-DLD-78-C)问卷调查806例9-12岁学龄儿童的呼吸道症状。本次调查选取的小学是根据距离A区Map Ta Phut工业区1公里以内的距离。， B区5公里。面积C 10公里。采用Logistic回归技术评估呼吸道症状患病率与自变量之间的关系。A区2011-2014年平均24小时PM10和VOCs浓度显著高于C区(p<0.05)。相对,呼吸道症状的患病率很高,优势比(或)= 3.41(95%可信区间(CI) = 1.70 - -6.85)和B区或= 1.36 (95% CI = 0.54 - -3.45),相比地区c .非特异性呼吸道疾病的流行(NSRD)和持续的咳嗽和痰(PCP)在学生高于男孩女孩的学生或= 2.17,95% CI -3.53 = 1.33),而这些因素如年龄、居住几年,家里大小,父母吸烟的习惯,使用空调和养宠物没有关系。暴露于工业场所产生的颗粒物质和挥发性有机化合物与儿童呼吸障碍恶化有关。
{"title":"Effects of air pollution related respiratory symptoms in school children in industrial areas Rayong, Thailand","authors":"Paradee Asa, W. Jinsart","doi":"10.14456/EA.1473.14","DOIUrl":"https://doi.org/10.14456/EA.1473.14","url":null,"abstract":"The chronic effects of air pollution in school children living near industrial sites were investigated. There spiratory symptoms of 806 school children aged 9-12 years were examined by the American Thoracic Society’s Division of Lung Diseases (ATS-DLD-78-C) questionnaire during February-August 2013. The selected elementary schools in this survey was based on the distance from Map Ta Phut Industrial Estate, area A within 1 km., area B 5 km. and area C 10 km. Logistic regression techniques were used to assess the association between prevalence of respiratory symptoms and independent variables. The average 24 hrs PM10 and VOCs concentrations from 2011-2014 in area A were significantly higher than in area C (p<0.05). Relatively, the prevalence of respiratory symptoms in area A were high with odds ratios (OR) = 3.41, (95% confidence intervals (CI) = 1.70-6.85) and in area B with OR = 1.36, (95% CI = 0.54-3.45), in comparison to area C. The prevalent of non-specific respiratory diseases (NSRD) and Persistent Cough and Phlegm (PCP) in boy student were higher than girls students with OR=2.17, (95% CI=1.33-3.53), whereas those factors such as age, residential years, home size, parental smoking habits, use of air conditioners and domestic pets were not associated. Exposure to particulate matter and volatile organic compounds arising from Industrial sites was associated with worse respiratory impairments in children.","PeriodicalId":39663,"journal":{"name":"EnvironmentAsia","volume":"77 1","pages":"116-123"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66672651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The objective of this study is to investigate the biogas production from Anaerobic Co-Digestion of Night Soil (NS) with Food Waste (FW). The batch experiment was conducted through the NS and FW with a ratio of 70:30 by weight. The experiment is mainly evaluated by the characteristic of Co-Digestion and Biogas Production. In addition of food waste was inflating the COD loading from 17,863 to 42,063 mg/l which is 135 % increased. As the result, it shows that pH has dropped off in the beginning of 7-day during digestion and it was slightly increased into the range of optimum anaerobic condition. After digestion of the biogas production was 2,184 l and 56.5 % of methane fraction has obtained within 31 days of experimentation. The investigation of Biochemical Methane Potential (BMP) and Specific Methanogenic Activities (SMA) were highly observed. And the results were obtained by 34.55 mLCH4/gCODremoval and 0.38 gCH4-COD/gVSS-d. While the average COD removal from the 4 outlets got 92%, 94%, 94 % and 92 % respectively. However, the effluent in COD concentration was still high and it needs further treatment before discharge.
{"title":"Biogas Production from Batch Anaerobic Co-Digestion of Night Soil with Food Waste","authors":"Assadawut Khanto, Peerakan Banjerdkij","doi":"10.14456/EA.1473.9","DOIUrl":"https://doi.org/10.14456/EA.1473.9","url":null,"abstract":"The objective of this study is to investigate the biogas production from Anaerobic Co-Digestion of Night Soil (NS) with Food Waste (FW). The batch experiment was conducted through the NS and FW with a ratio of 70:30 by weight. The experiment is mainly evaluated by the characteristic of Co-Digestion and Biogas Production. In addition of food waste was inflating the COD loading from 17,863 to 42,063 mg/l which is 135 % increased. As the result, it shows that pH has dropped off in the beginning of 7-day during digestion and it was slightly increased into the range of optimum anaerobic condition. After digestion of the biogas production was 2,184 l and 56.5 % of methane fraction has obtained within 31 days of experimentation. The investigation of Biochemical Methane Potential (BMP) and Specific Methanogenic Activities (SMA) were highly observed. And the results were obtained by 34.55 mLCH4/gCODremoval and 0.38 gCH4-COD/gVSS-d. While the average COD removal from the 4 outlets got 92%, 94%, 94 % and 92 % respectively. However, the effluent in COD concentration was still high and it needs further treatment before discharge.","PeriodicalId":39663,"journal":{"name":"EnvironmentAsia","volume":"9 1","pages":"77-83"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66672668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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