Disrupting traditional aquaculture with Recirculating Systems (RAS)

by Saumya Garg & Arielle Numbro Land-based recirculating aquaculture system (RAS) is a partially closed loop aquaculture technology that has recently gained widespread market acceptance and scale. RAS is not only environmentally sustainable but also helps conserve water in modern aquaculture systems. The technology also enables a better control over the farm environment, greatly reducing 

Indirect Potable Reuse Water

By Saumya Garg (This is Part 3 of a three-part series on Reclaimed Water. Part 1 of the series was an introduction on reused water. In Part 2 we looked at Direct Potable Reuse of water.) Indirect Potable Reuse (IPR) water is when reclaimed water is released to environmental buffers such as reservoirs and aquifers 

UVShield™ and Water Leak Detector

By: Snejana Nakova How do you know the UV lamp is on? Older UV systems used to have a view port you could look into. But pressing your eye against a lens and looking at a 3.5 kW UV lamp could be intimidating. Many systems have the UV chamber and electrical control panel in different 

Direct Potable Reuse Water

By Saumya Garg (This is Part 2 of a three-part series on Reclaimed Water. Part 1 of the series was an introduction on reuse water. In Part 3 we will look at Indirect Potable Reuse of water.) Direct Potable Reuse (DPR) water is when reclaimed water is either directly blended with raw water immediately before 

Reuse Water: What it is and Why it matters

By Saumya Garg (This is Part 1 of a three-part series on Reclaimed Water. Part 2 of the series will shed some light on Direct Potable Reuse of water and Part 3 will look at Indirect Potable Reuse of water.) Growing human population, urbanization, expanding agricultural production, and climate change have created large water demands 

The role of UV disinfection on controlling Legionella in a healthcare facility’s water management program

By: Brian Grochowski In 2017 the Centers for Medicare & Medicaid Services (CMS) issued a memorandum requiring healthcare facilities to implement a water management program to reduce the risk of growth and spread of Legionella and other opportunistic pathogens in water. The memorandum stated that between 2000 and 2014, 19% of reported cases of Legionnaires’ 

Did you know that you can remove free chlorine with a UV System?

Chlorine is being used as the most common disinfectant in water treatment processes. Municipal water works are using chlorine as a residual disinfectant to maintain hygienic conditions within the public drinking water network, feeding both domestic and industrial consumers. In addition, many industrial users also dose chlorine within their water treatment processes, either to secure 

China Spring Festival closure

Hanovia China hubs will be closed for the upcoming public holiday – Spring Festival – from Jan 24th 2020 (Friday) to Jan 30th 2020 (Thursday). The hubs stop working on Jan 19th 2020 (Sunday) and Feb 1st 2020 (Saturday) and resume work on Jan 31st 2020 (Friday).

Christmas closure

– Berson (NL) will close the 25th Dec and re-open the 6th Jan 2020, – Hanovia (UK) will close the 24th Dec (midday) and re-open the 2nd Jan 2020. – Aquionics (USA) will close the 23th Dec until and incl. the 27th Dec, and on the 1st Jan. During this period, we will be unable 

对抗水传播疾病：氯还不够！

据估计，全球每年有近8500万人游玩水上乐园。 根据Statista的数据，截至2019年，仅美国就有约1,158个水上乐园，其中817个是室外的，155个是室内的，111个是独立室内水上乐园，其余75个是带有室外水上乐园的度假村 。考虑到他们的人流量大，美国的每个州和城市都有一套自己的规范和指南 (https://www.cdc.gov/healthywater/swimming/states.html) ，以进行建设和维护休闲水上乐园和跳水池。 为了制定适当的安全条件，各个公共卫生部门和市政府官员都依赖《水生健康标准守则》（MAHC）进行指导。 MAHC是美国疾病预防控制中心、公共卫生官员、水上运动 行业专家和研究人员长达7年合作的成果。该法规的第一版于2014年发布，包括关于公共水生设施的设计、建设、操作、维护、政策和管理的指导方针。除了避免事故外，MAHC的一项主要规定是集中管理泳池水污染和水传播疾病。 2000年至2014年期间，全国共爆发498起娱乐用水疾病(RWI)，导致至少27253起病例和10人死亡。在这些暴发中，363起经确认的感染病因导致24453例:89%感染隐孢子虫，4%感染假单胞菌，3%感染军团菌。娱乐用水疾病主要是由于摄入了受污染的水或接触了有害的泳池中的化学物质而导致的。这些疾病的症状从轻微的皮疹到严重的胃肠道和呼吸道感染。 各州公共卫生机构自愿向疾控中心报告娱乐用水疾病病例。一旦疫情得到确认，信息将在国家疫情报告系统(NORS)和水传播疾病和疫情监测系统(WBDOSS)中登记。由于娱乐用水疾病（RWIs）对公众健康构成严重威胁，疾病预防控制中心非常重视污染的预防。因此，MAHC制定了明确的指导方针，包括员工培训、频繁的手动测试、自动控制器的标准化，以及使用适当大小的化学加药系统(根据娱乐设施的大小和类型)。此外，疾病预防控制中心强烈建议将污染应对计划（针对粪便，呕吐物和/或血液的污染）纳入其中，作为设施管理程序的重要组成部分。 能阻止娱乐用水疾病（RWIs）远离水上乐园和跳水池的唯一方法是对水进行充分的洁净和消毒，并定期维护泳池设备。抵御病原体的第一道防线是使用含氯消毒剂。适量的氯和正确的pH值可以杀死大多数有害的病原体。然而，耐氯病原体，如隐孢子虫，即使在充分消毒的池中也能存活数天。因此，添加补充方法来保持水的洁净是很重要的。 水生设施使用高效的水过滤系统，该系统运行多个循环的水池水以维持良好的水质。然而，根据《水生健康标准守则》（MAHC），过滤系统不应该只是让水看起来干净。相反，它们也应该有效地杀灭病原体。事实上，意外的粪便污染可能会消耗殆尽消毒剂残留物，这使得使用强大的过滤系统成为娱乐用水疾病（RWIs）预防的关键要求。在这一领域，已经发现高速砂滤是隐孢子虫卵囊的有效屏障。 鉴于耐受消毒剂的寄生虫引起的娱乐用水疾病（RWIs）暴发数量的增加，《水生健康标准守则》进一步强调了对二级消毒系统的需求。其目的是最大程度地减少有害病原体的暴露时间。MAHC建议的两个此类二次系统是基于紫外线（UV）和基于臭氧的系统。已经发现，利用紫外线来处理100％的循环水流，对于将隐孢子虫卵囊降低到感染水平以下是非常有益的。紫外线通过改变微生物的DNA结构并干扰细胞生长来杀死微生物。 事实证明，将高剂量紫外线与水过滤系统结合使用，是对抗有害病原体和控制娱乐用水疾病爆发的必要第二道防线。