The main source of drinking water for rural communities in India is rainwater harvesting ponds. These ponds do have a sand filtration system for turbidity removal, but the bacteriological quality of these ponds is not under compliance in most cases. In this context, Pattikadu village in Kancheepuram District (Tamil Nadu, South India) was chosen as the study area. It was observed that the biological parameter of drinking water from hand pumps exceeds the limit prescribed by Indian standards. In this work, zero-energy disinfection technology was developed using UVC-LEDs for drinking water to meet the standards. The electrical power required for the disinfection was taken from the mechanical energy from up and down movement of the hand pump lever. UVC-LEDs (λ_emission 275 ± 5 nm) were powered by a 6 V rechargeable battery which stores electrical energy by mechanical movement of the hand pump lever. An annular-type UVC-LED photo-reactor (1 litre) was developed and 100% disinfection within 6 minutes’ contact time was achieved. The UVC dose-based inactivation rate constant was 0.57 cm²/mJ. The present study demonstrated 2-log inactivation for a 4.68 mJ/cm² UVC dose. The novelty of the study is its practical applicability of a sustainable point-of-use disinfection technology which might be economically implemented in lower-income smaller communities.

印度农村社区的主要饮用水来源是雨水收集池。这些池塘确实有一个用于除浊的砂滤系统，但是在大多数情况下，这些池塘的细菌学质量均未达标。在这种情况下，选择了Kancheepuram区（印度南部泰米尔纳德邦）的Pattikadu村作为研究区域。据观察，手动泵饮用水的生物学参数超过了印度标准规定的极限。在这项工作中，开发了使用UVC-LED的饮用水零能耗消毒技术，以达到标准。消毒所需的电能来自手动泵杆上下运动产生的机械能。UVC-LED（_发射λ275±5 nm）由6 V可充电电池供电，该电池通过手动泵杆的机械运动来存储电能。开发出环形的UVC-LED光反应器（1升），并在6分钟的接触时间内实现了100％的消毒。基于UVC剂量的失活速率常数为0.57cm ² / mJ。本研究证明了4.68 mJ / cm ² UVC剂量的2-log失活。该研究的新颖之处在于它在可持续性使用点消毒技术上的实际适用性，该技术可在低收入的较小社区中经济地实施。