Assessment of odor and land application impacts of disposal of Westside municipal biosolids

城市和工业依靠生物处理工艺来处理废水中的有机污染物。然而，生物处理工艺的缺点之一是高残余污泥产生。在发展中国家和工业化国家，由于对填埋、海洋处置和焚烧的质量要求更严格，剩余污泥的处理/处置是工厂运行的瓶颈。只是在最近几年，更多的废水污泥（生物固体）在常规或先进的污泥处理工艺（即堆肥、好氧/厌氧消化）之后被有益地用作土壤改良剂。 虽然生物固体的土地应用已被接受为一种具有成本效益的废物处理方法，并提供其他好处（即回收养分以改善土壤质量），但它也可能带来一些环境风险，特别是从长远来看。气味、病原微生物、重金属和其他人为微污染物，如激素、药物和个人护理产品（PPCPs）、溴化阻燃剂（BFR），是评估生物固体土地应用的环境影响时新出现的主要污染物。为了评估长期的可持续性和公众的可接受性，本项目将研究西基洛纳区（BC， 加拿大）。该项目将侧重于三个不同但相互关联的方面：（1）监测生物固体处理/运输产生的气味，（2）评估土地应用现场储存/固化期间的生物固体堆，（3）土地应用前后现场土壤和水处理厂的污水质量评估，以分析对Trepanier Creek流域的下游影响。在这项研究的帮助下，我们的市政合作伙伴将获得有关其污泥处理列车效率及其土地应用对环境影响的宝贵信息。加拿大卫生部和不列颠哥伦比亚省环境部将获得有关其生物固体中新化合物优先清单的命运的更多信息。

Municipalities and industries rely on biological treatment processes to treat organic pollutants in wastewater. However, one of the drawbacks of the biological treatment processes is high residual sludge generation. Treatment/disposal of residual sludge is a bottleneck in plant operation in both developing and industrial countries due to more stringent quality requirements for landfilling, ocean disposal, and incineration. It is only in recent years that much more wastewater sludge (biosolids) is beneficially used as soil amendment after conventional or advanced sludge treatment processes (i.e. composting, aerobic/anaerobic digestion). Although land application of biosolids has been accepted as a cost-effective waste disposal method that provides other benefits (i.e. recycling nutrients to improve soil quality), it can also carry some environmental risks, especially in the long-term. Odours, pathogenic microorganisms, heavy metals and other anthropogenic micro-pollutants, such as hormones, pharmaceuticals and personal care products (PPCPs), brominated flame retardants (BFRs), are the major contaminants with emerging concern when it comes to assessing the environmental impact of land application of biosolids. In order to evaluate the long-term sustainability and public acceptability, this project will study the environmental impact of land application of municipal biosolids generated by the Westside Regional Wastewater Treatment Plant in the District of West Kelowna (BC, Canada). The project will focus on three different but interlinked aspects; (1) monitoring of odours as a result of biosolids treatment/transportation, (2) assessment of biosolids piles during storage/curing at the land application site, (3) quality assessment of soil and effluent from the water treatment plant at the site before/after land application to analyze the downstream impact on the Trepanier Creek watershed. With the help of this study, our municipal partners will obtain valuable information on the efficiency of their sludge treatment trains and the environmental impact of their land application. Health Canada and the BC Ministry of Environment will obtain additional knowledge on the fate of their prioritized list of emerging compounds in biosolids.