The potential health risk related to wastewater reuse in agriculture remains a major environmental concern; although chlorine is predominantly used to treat wastewater, it leaves behind harmful disinfection by-products. Thus, in this study, a new secondary disinfectant Huwa-San (HS) has been used to reduce the harmful components in wastewater treatment plants. The effluent quality of four wastewater treatment plants and their transport lines in Riyadh, Saudi Arabia, were monitored for 8 months. The description of plants, effluent quality data, and their conformity to the standards are presented. The outcomes of this investigation proved that the mean values of disinfection by HS was more effective than chlorine in decreasing turbidity, ammonia, and E. coli by 2.3%, 20% and 100% in the plants and 97%, 25% and 100% in the transport lines (TL), respectively, while chlorination was more effective than HS in minimizing nitrate concentration and the sodium adsorption ratio (SAR), by 6% and 6% in the plants and in the TL, by 1% and 11%, respectively. The mean values of SAR, EC, and pH under both disinfectants were within water quality Saudi Standard. A monitoring survey at the WWTPs revealed that HS treatment met most of the quality requirements for unrestricted irrigation, whereas chlorine treatment did not achieve most of the quality requirements for restricted irrigation.

与农业废水回用有关的潜在健康风险仍然是主要的环境问题；尽管氯主要用于处理废水，但它会留下有害的消毒副产物。因此，在这项研究中，使用了一种新型的二级消毒剂Huwa-San（HS）来减少废水处理厂中的有害成分。对沙特阿拉伯利雅得的四个废水处理厂及其运输线的废水质量进行了为期8个月的监测。介绍了工厂的说明，废水质量数据及其对标准的符合性。这项研究的结果证明，通过HS消毒的平均值在降低浊度，氨和大肠杆菌方面比氯更有效。在工厂中分别降低了2.3％，20％和100％，在运输线（TL）中分别降低了97％，25％和100％，而氯化在降低硝酸盐浓度和钠吸附率（SAR）方面比HS更有效。在工厂和TL中分别增加6％和6％，分别是1％和11％。两种消毒剂的SAR，EC和pH平均值均在沙特水质标准之内。在污水处理厂进行的一项监测调查显示，HS处理符合无限制灌溉的大部分质量要求，而氯处理没有达到限制灌溉的大多数质量要求。