Negative Emission Sewage Treatment (NEST)

**负排放污水处理(NEST)**水质和可用性是一个全球性的挑战。回收废水中的宝贵资源是一个关键的全球机遇和目标。80%的废水排入世界水道，给经济、健康和环境带来挑战。人口增长和城市化进一步加剧了这一挑战，废水产生量不断增加，给清洁水资源带来更大压力。更严格的监管问题和日益增加的环境问题使废水处理系统（WWT）比以往任何时候都更加相关，并有助于这一市场的增长。此外，中国和印度对污水处理的日益关注，为这些市场提供了重要的机会。**传统污水处理厂技术**世界上大多数污水处理厂采用的污水处理厂技术发明于19世纪90年代，至今仍未改变。它的排放量约占温室气体排放总量的3%（二氧化碳、甲烷和二氮氧化物），并且无法有效去除磷酸盐、药物、内分泌干扰物、多氟烷基和全氟烷基物质以及微塑料。**NEST污水处理技术**NEST是碳负的，使用温室气体排放作为碳和氮源。可去除磷酸盐、药物、内分泌干扰物和微塑料。计划于2020年进行多氟和全氟烷基物质（PFAS）去除效果试验。生产微藻生物量作为肥料和土壤改良剂。或者，可将生物质水热液化（压力煮熟）以生产生物原油和浓缩肥料。**积极的环境影响**通过减少温室气体排放缓解气候变化，全球有可能减少4%。磷酸盐的去除和回收将减轻水体中的有毒藻华。药物、内分泌干扰物、PFAS和微塑料的去除将对水生环境产生巨大的有益影响，从而维持生物多样性。

**NEGATIVE EMISSION SEWAGE TREATMENT (NEST)** Water quality and availability is a global challenge. Recovering the valuable resources embedded in wastewater is a key, global opportunity, and goal. 80% of all wastewater is discharged into the world's waterways where it creates economic, health, and environmental challenges. Population growth and urbanization further intensify this challenge with increasing wastewater generation that places more pressure on clean water resources. More stringent regulatory issues, and increasing environmental concerns make wastewater treatment systems (WWT) more relevant than ever and aids in the growth of this market. Moreover, growing focus on sewage treatment in countries in China, and India, provide significant opportunities in those marketplaces. **Conventional WWT technology** The WWT technology deployed in the majority of sewage farms worldwide was invented in the 1890's and has remained unchanged. It emits approximately 3% of total GHG emissions (CO2, methane and dinitrogen oxide) and is unable to effectively remove phosphates, pharmaceuticals, endocrine disruptors, poly- and perfluoroalkyl substances (PFAS) and microplastics. **NEST WWT technology** NEST is carbon negative and uses GHG emissions as a carbon and nitrogen source. Demonstrated removal of phosphates, pharmaceuticals, endocrine disruptors and microplastics. Poly- and perfluoroalkyl substances (PFAS) removal efficacy trials planned for 2020\. Produces microalgal biomass for monetisation as fertiliser and soil conditioner. Alternatively, the biomass may be hydrothermally liquefied (pressure cooked) to produce biocrude oil and a fertiliser concentrate. **POSITIVE ENVIRONMENTAL IMPACTS** Climate change mitigation through GHG emission reduction with potential for 4% reduction globally. Phosphate removal and recovery will mitigate toxic algal blooms in water bodies. Pharmaceutical, endocrine disruptor, PFAS and microplastic removal will have hugely beneficial impact on the aquatic environment, thus maintaining biodiversity.