浅谈某生活污水处理工程设计

文章介绍了某生活小区污水处理采用BAF工艺及各处理单元的主要技术参数,并对污水处理运行过程中存在的问题提出了改进措施。     

倾角12°及以下斜巷快速施工技术研究与应用

五矿己四采区暗斜井锚网喷施工中,引进了钻车打眼加皮带排矸机械化快速施工作业线,优化施工,采用"掘支喷"平行作业,大大提高了施工速度。2010年5月至12月连续8个月取得了月进尺超百米的好成绩,其中最高月进尺153米,实现了大断面斜巷快速施工。     

Managing solid waste in small hotels

Collectively, small hotels constitute a significant solid waste management (SWM) problem. Little research has focused on the SWM practices of small hotels. In the United Kingdom, much of the solid waste generated by small hotels goes to landfill. This study uses a constructionist approach to investigate SWM issues in small hotels in a local authority in Wales and examines the role of the public sector in helping small hotels manage their solid waste effectively. The results revealed that only a minority of small hotels were considering the adoption of sustainable SWM practices, either because hoteliers felt negatively about sustainable SWM alternatives or perceived challenges – an issue which necessitates government intervention. At the time of this study, the public sector provided only very modest services to enhance SWM practices. This study proposes a best practice model for the public sector to encourage small hotels to manage their solid waste effectively, in order to reduce or even eliminate waste for landfill. Local authorities' support is required to make waste management hierarchy options more accessible to small hotels and should incentivise better waste management through increasing the gap between the costs of landfill and recycling waste.     

城市生活垃圾资源化政府最优补贴博弈分析

城市生活垃圾资源化能够带来巨大的经济效益、环境效益与社会效益,是贯彻国家绿色发展理念的必经之路。城市生活垃圾资源化体系的持续发展需要政府补贴作为保障,减少资源化产品与同类非资源化产品的价格差异,弥补相关企业投入产出不匹配的矛盾。本文基于社会福利最大化理论,将政府补贴作为决策变量,构建各利益主体之间的价格博弈模型,确定政府最优补贴额度和其他主体的最优决策,并根据结论提出相关建议。研究表明:要实现整体效益最大化,政府需要在不同环节采取不同的补贴方式与补贴额度。     

Consumer avoidance of specially priced items during social coupon redemption

Social coupons (SCs) (e.g., Groupon) differ from traditional or regular coupons (RCs) in that they require consumers to make a prepayment to receive substantive discounts. As the general rule of SCs prohibits double-promotion, SC consumers tend to engage in certain avoidance behaviors when experiencing another promotion (i.e., specially priced for selected items). The results across two scenario-based experiments reveal that SC consumers (vs. RC consumers) have a greater tendency to avoid specially priced items when redeeming a coupon for hedonic consumptions, but not for utilitarian consumptions. Such avoidance is due to one’s motivation to minimize the perception of deal waste.     

Understanding the antecedents of consumers' attitudes towards doggy bags in restaurants: Concern about food waste,culture, norms and emotions

Based on a qualitative study with 20 respondents in France and 20 respondents from the Czech Republic, this study aims to better understand how consumers’ concern about food waste, culture, social norms and emotions contribute to consumers’ attitudes and behaviors related to doggy bags. Results highlight a double paradox between conflicting norms and emotions: personal norms encourage not to waste while salient social norms encourage leaving leftovers; asking for a doggy bag generates immediate shame while leaving leftovers produces anticipated regret and guilt. Finally, the study sheds light on obstacles to overcome for the adoption of this social innovation.     

用煤矸石和湖底淤泥生产烧结泡沫砖的研究

泡沫墙体材料具有良好的绝热性能,有利于提高建筑物的节能性.文章重点介绍了用煤矸石和湖底淤泥生产烧结泡沫砖的工艺方法及产品的相关性能,为综合利用煤矸石提供了一个新的途径.     

苏南经济发达地区农村固体废物现状及对策分析

太湖由于高强度的开发和水环境治理的滞后,水环境污染日趋严重。突出表现在河网水质的污染和太湖的富营养化,流域内水质型缺水和水污染矛盾不断发生和发展,己成为流域经济社会可持续发展的制约因素。以江苏宜兴地区农村固体废物资源化调查为例,通过对示范村的农户进行实地调查,获得太湖周边地区经济较发达的农村生活垃圾产生情况及垃圾特性,并了解当地村民的环境保护意识,分析农村生活垃圾回收利用的可行性,为农村生活垃圾的资源化利用提供决策依据。     

废弃塑料的回收物流与再利用研究——以中山市为例

塑料一方面方便了生活,另一方面也带来了环境污染。最大的问题是废弃塑料的处理,为了可持续发展,应采取不埋、不焚、不丢的原则,避免二次污染。最好的方法是回收再利用,不仅可以解决废弃塑料的污染问题,还为企业带来新的利润增长点,为了达到这一目的,从分析中山市废弃塑料的回收利用现状为切入点,经过调查研究,了解废弃塑料回收物流与再利用的现状,掌握存在的问题,借鉴国外成功经验,提出废弃塑料回收再利用建议。     

Estimating a Local Food Waste Baseline

ABSTRACT

This article estimates the amounts of food that is discarded, diverted, and landfilled in Minnesota by comparing and applying approaches and statistics from selected national, regional, and local studies. Our preferred estimates suggest 2.1 million tons of food is discarded in Minnesota, of which 60% is diverted through recovery and recycling efforts. The remaining 834 thousand tons are landfilled. This landfilled amount, considered as “food waste,” is smaller than the 1.3 million tons calculated using the ReFED (2016) methods, but its estimated distribution across the food supply chain is similar. Residential losses account for the largest proportion of food waste landfilled (43%). The processing and manufacturing stage discards the largest proportion of food (36%), but generates the smallest amount landfilled because of a high diversion factor. The range of estimates obtained from various methods highlights the complexities in choosing appropriate assumptions, factors, and datasets when calculating food waste baseline amounts.