Evaluation of an innovative integrated technology for the processing of municipal wastewater biosolids.

加拿大的废水处理设施每年产生超过250万吨湿吨的生物固体和污泥。随着人口的扩大，城市生物固体的产量继续增加。目前，市政当局正在通过垃圾填埋、焚烧、土地应用和先进稳定化(即堆肥或碱性稳定化)来管理生物固体。生物固体加工产生的主要排放物包括颗粒和恶臭气体，它们被认为是一种有害物质，需要在排出之前进行处理。随着废水基础设施的不断老化，新的低成本、小占地和高能效技术备受追捧。需要升级废水设施，以执行加拿大市政环境理事会签署的《全加拿大市政生物固体管理战略》。沃克环境集团是一家总部位于安大略省的公司，拥有获得专利的N-Viro®工艺，这是一种先进的稳定技术，用于生产被称为N-Rich®的农业化肥和土壤改良剂。沃克环境公司的目标是在其先进的碱性稳定工艺之前引入一种创新的化学前处理工艺。这一应用研究项目的主要目标是评估和优化创新的化学前处理工艺，以提高处理工艺、处理固体、降低运营成本和减少气味的能力。通过确定处理废水固体时的最佳操作条件，包括化学投加量、接触时间、pH等，来确定该前处理工艺的最优化。这项研究的结果将使Walker Environmental能够在现实世界条件下开发和优化这一集成系统，以低成本处理市政固体并生产B类生物固体材料。此外，他们将能够向潜在客户展示这一新系统在处理能力和副产品质量方面所提供的能力，使他们能够在加拿大和国际市场扩张。

Canadian wastewater treatment facilities produce more than 2.5 million wet tonnes of biosolids and sludge per year. The quantity of municipal biosolids produced continues to increase as the population expands. Currently municipalities are managing biosolids through landfill, incineration, land application, and advanced stabilization (i.e. composting or alkaline stabilization). The primary emissions from biosolids processing includes particulates and odorous gases which are considered a nuisance and need to be treated before being exhausted. As wastewater infrastructure continues to age, new low cost, small footprint, and energy efficient technologies are highly sought after. Upgraded wastewater facilities are needed to implement the Canada-wide Strategy for the Management of Municipal Biosolids signed by the Canadian Council of Municipalities of the Environment. Walker Environmental Group Inc. is an Ontario-based company that owns the patented N-Viro® process, an advanced stabilization technology, to produce agricultural fertilizers and soil amendments, known as N-Rich®. Walker Environmental aims to introduce an innovative chemical pretreatment process prior to their advanced alkaline stabilization process. The primary objective of this applied research project is to assess and optimize the innovative chemical pretreatment process for its ability to enhance the treatment process, treat solids, reduce operating costs and reduce odour. Optimization of this pretreatment process will be confirmed by determining optimal operating conditions when processing wastewater solids, including e.g. chemical dose, contact time, pH. The results of this research will allow Walker Environmental to develop and optimize this integrated system under real world conditions to process municipal solids and produce a Class B biosolids material at low costs. Moreover, they will be able to demonstrate to potential customers what this new system has to offer in terms of treatment capabilities and by-product quality, allowing them to expand in the Canadian and international markets.