ISO14001 Environmental Management System Certification

As spring arrives and temperatures rise , algae in the water quietly "awaken," entering their most active breeding season of the year . For water plants, spring is not only a crucial period for water quality control, but also a tough battle against algae, crucial for drinking water safety, process stability, and operational cost control. Excessive algae growth can easily clog filters and increase the frequency of backwashing. Furthermore, the odor-causing substances they produce, such as geosmin and 2-methylisoborneol, as well as algal toxins, all pose potential threats to drinking water safety. Today, we've compiled some scientific solutions based on the actual challenges of algae control in spring , providing a practical guide for water plants' algae removal efforts .

 I. Why do algae grow so rapidly in spring?

affected by several factors, including light, water temperature, and the concentration of nutrients in the water . After spring arrives, the hours of sunshine lengthen and the water temperature gradually rises to a range suitable for algae growth, creating favorable conditions for photosynthesis. At the same time, nutrients that have been deposited at the bottom of the water body during winter are turned to the surface when water convection intensifies in spring, providing ample nutrients for the large-scale reproduction of algae and forming a "breeding ground" for algae growth.

In spring, water plants commonly encounter dominant algae species such as diatoms and early-stage blue-green algae. These algae not only affect the taste of drinking water but also interfere with conventional water purification processes such as coagulation, sedimentation, and filtration . This results in loose coagulated flocs that are difficult to settle, clogged filters, and significantly shortened operating cycles. These are all key challenges for water quality control in water plants during the spring.

II. Algae Removal and Water Protection: A Systematic Strategy from Source to Tap

Regarding the issue of algae control in water plants during the spring , relying on a single agent or process is unlikely to achieve the desired algae removal effect. Effective algae control requires comprehensive management covering the entire process, including source water control, water plant process optimization , and pipeline network operation and maintenance. To implement the three principles of "source control, process enhancement, and precise measures" in practice, it is essential to first ensure real-time monitoring and early warning of water sources , increasing the frequency of algae and chlorophyll a testing , and combining online monitoring with manual inspections to achieve early detection and treatment . For lakes and reservoirs with suitable conditions, ecological methods such as introducing filter -feeding fish and planting aquatic plants can inhibit algae growth at the source, significantly reducing the subsequent treatment burden . Adding a pre-oxidation stage is the first step before implementing water treatment processes and is crucial for improving algae removal efficiency. Traditional chlorine pre- oxidation easily produces disinfection byproducts, while chlorine dioxide, with its unique advantages, is better suited to the algae removal needs of spring—it can quickly kill algal cells with broken cell walls, oxidize and decompose algal-related odors , and produces almost no harmful byproducts such as trihalomethanes. Its oxidation performance is not affected by the pH value of the water body and can maintain a stable effect even when the raw water quality fluctuates. In practical applications, chlorine dioxide can be added at the water intake or before coagulation. The dosage of 0.5-2.0 mg/L can be determined through beaker tests based on the raw water quality, which can significantly improve the algae removal rate of coagulation and sedimentation and extend the filter's operating cycle. In addition, water sources with high algae incidence or water plants with high water quality requirements can upgrade to advanced processes such as ozone-activated carbon and membrane treatment. At the same time, water plants need to stockpile emergency algae removal agents and formulate contingency plans for algal blooms to deal with sudden algal blooms and ensure stable water supply.

III. Scientifically Selecting Algae-Removing Oxidizing Agents

When selecting algaecides , water plants must consider several key factors , including effectiveness, safety, economy, and compatibility , as these affect algae control, water quality safety , and operating costs. In practical applications at water plants across various regions, Xiuba brand stable chlorine dioxide disinfectant has earned a good reputation for its excellent performance. Xiuba brand stable chlorine dioxide disinfectant is well-suited to the actual needs of water plants for algae control in spring. Leveraging extensive experience and advanced production technology, the product not only meets effective content standards and has a long shelf life, but also maintains a high activation rate during on-site use, rapidly releasing sufficient effective chlorine dioxide without repeated adjustments, ensuring efficient algae control. It effectively inactivates various algae commonly found in water plants during spring, such as diatoms and blue-green algae , while effectively removing earthy and musty odors caused by algae, improving the taste of drinking water and optimizing the user experience. The chemical reaction produces mainly chloride ions and chlorite. When added at the prescribed dosage, all indicators of the chlorine dioxide disinfectant meet national drinking water standards, without producing harmful byproducts such as trihalomethanes, effectively reducing the risks associated with disinfection byproducts. Furthermore, it exhibits excellent environmental adaptability, maintaining stable oxidation performance even when raw water temperature and pH fluctuate in spring, eliminating the need for frequent adjustments to dosage parameters. Its simple operation meets the practical needs of daily water plant operations.

IV. Authoritative Endorsements and Industry Recognition: Key Considerations When Choosing Algae Removal Products

As a core component of drinking water safety, water plants must prioritize the reliability of algae removal and disinfection products, along with their underlying technical expertise and authoritative certifications. These factors are not only fundamental to ensuring effective algae removal but also crucial for safeguarding water quality.

Since its founding in 1983, Shandong Huashi Pharmaceutical Co., Ltd. has been deeply involved in the field of chlorine dioxide disinfection. In the blink of an eye, 43 years have passed, during which time the company has accumulated rich industry experience in technological research and development and production practice. Chen Xiaoping, the company's technical director, is one of the drafters of the national standard for "Stable Chlorine Dioxide Solution" (GBT20783-2023), and has participated in the formulation of multiple standards over many years. The company also owns 35 chlorine dioxide-related patents, of which 9 invention patents have been successfully applied to the research and development and production of algae-removing and disinfection products. The company's production strictly adheres to the ISO9001 quality management system, ISO14001 environmental management system, and ISO45001 occupational health and safety management system standards, with strict quality control requirements throughout the entire process from raw materials to finished products.

In addition, Xiuba brand offers a variety of chlorine dioxide product formulations, including powder, tablets, and liquid, which can be flexibly adapted to different water plants based on their algae situation, process configuration, and treatment scale. At the same time, it can also tailor dosing plans for water plants and provide professional technical guidance to achieve "one policy for one plant" and help water plants carry out algae removal work efficiently in spring.

V. Key Points and Practical Suggestions for Algae Control in Spring

Over the years, we have served hundreds of water plants, accumulating a wealth of practical experience in algae removal . When it comes to using chlorine dioxide for algae removal in water plants, the most crucial point is to carefully control every detail and absolutely avoid blind operation. The following practical points are based on numerous on-site tests and repeated verifications, and are provided for reference by water plant operation and management personnel.

1. Adhere to a one-plant-one-policy approach: Dosing parameters from other water plants cannot be directly copied . Although they have reference value, they should be based on the actual situation of the water plant itself. Even water plants in the same area have differences in algae species , organic matter content, and process configuration, so the corresponding dosage and dosing point will also be different. Small-scale beaker tests must be conducted to determine the appropriate chlorine dioxide dosing plan.
2.  To achieve precise dosing: It is recommended that water plants be equipped with an automated chlorine dioxide dosing system. The system should monitor the original water flow rate, algae concentration and other data in real time to dosing the correct amount of chlorine dioxide. This method can ensure stable algae removal effect, reduce chemical waste and reasonably control operating costs.
3.  Strengthen full-process monitoring: To ensure stable water quality at the water plant, we must start by strengthening water quality testing throughout the entire process from pre-oxidation to the effluent . We should focus on algae removal rate, chlorophyll a, turbidity, disinfection byproducts, and sensory indicators of water quality, and adjust chlorine dioxide dosing parameters in a timely manner based on the monitoring results .
4. Ensure safety precautions: The preparation and addition areas of chlorine dioxide must be well-ventilated . Operators must be professionally trained before starting work, strictly follow operating procedures, and wear protective equipment such as goggles and corrosion-resistant gloves to prevent safety accidents.

Spring algae control in water plants tests the technical control and meticulous management of the entire process. As long as we do a good job in every step and pay attention to details, we can minimize the impact of algae, allowing safe and clean water to flow into every household and safeguarding the bottom line of drinking water safety for the people.