RoClean™ Membrane Cleaners

Provide efficient and cost-effective removal of many different foulant and scales.

Innovative Solutions for a Better World

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At Kurita, we create shared value with customers and the environment. That’s why we developed our Value+ product portfolio, which aims to enhance productivity while reducing the total cost of operations (TCO) and supporting sustainability goals.

Our range of technologies, products, and services effectively minimizes water, waste, and energy consumption while also lowering carbon emissions.

RoClean™ Membrane Cleaners

All reverse osmosis (RO) systems foul over time. Symptoms of fouling include a decrease in normalized permeate flow, an increase in salt passage, or an increase in differential pressure. Severe fouling may also cause irreversible damage to membranes, making effective cleaning difficult or impossible.

RoClean™  cleaners provide powerful, highly effective solutions to membrane fouling issues. They are carefully formulated products, designed to quickly remove the complex foulant matrices associated with membrane systems, while ensuring that they are not aggressive for the membranes themselves, even at higher concentrations.

By restoring system performance, these products offer the following benefits:

Reduced Energy Consumption

Reduced Cleaning frequency

Increased membrane life

Reductions in chemical consumption and discharge

The complete range of cleaners covers all types of foulant, ensuring that there are products for all systems and all situations.

Environmentally Sensitive Membrane Cleaning Solutions

RoClean L504 and L511 are powerful membrane cleaning solutions designed to have a reduced environmental impact over traditional cleaning chemicals while retaining the highest level of efficacy.

They have the following environmental advantages:

  • Phosphorus free
  • EDTA free
  • Low aquatic toxicity
  • No tendency to bioaccumulate
  • Enhanced biodegradability

RoClean L504 and RoClean L511 are compatible with polyamide reverse osmosis membranes and most ultrafiltration and microfiltration membrane types. When applied in conjunction, these cleaners have a synergistic action, which is beneficial in removing natural organic materials and biofouling.

RoClean L504 is a low pH cleaner, which is particularly effective for iron deposits and alkaline scales. It removes metal ions that bind organic materials together, making their removal with high pH cleaners easier and more effective.

The product has a rapid action which can be particularly beneficial in short contact CIP and chemically enhanced backwashes in ultrafiltration and microfiltration systems.

RoClean L511 is a blend of biodegradable chelating agents, dispersing agents and surfactants which allow it to penetrate foulant, lift it from the membrane surface and retain it in the circulating solution. The product is effective for multiple foulant types, including organic material, algae, biofilm and silt deposits.

These products meet the requirements of the OSPAR Harmonised Mandatory Control System and can be used for membrane systems in the highly regulated offshore energy industry in the UK, Norwegian, Dutch and Danish sectors of the North Sea.

RoClean L504 meets the formulation requirements associated with Ecocert Ecolabel and Nordic Swan Ecolabel schemes. Both RoClean L511 and RoClean L504 meet the requirements of the Nordic Swan Paper Chemicals scheme.  

Case Studies

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Tetsuya Teramoto

Tetsuya Teramoto

Managing Director, Kurita R&D Asia Pte. Ltd.

Mr. Tetsuya Teramoto has served as Managing Director of Kurita R&D Asia Pte. Ltd. since 2024. Since joining Kurita Water Industries in 2006, he has accumulated nearly 20 years of experience in technology strategy, research and development, and business innovation, including investments in startup companies.

Throughout his career, Mr. Teramoto has led development projects across Japan, China, and the United States. Since 2023, he has been based in Singapore, where he has focused on accelerating technology development aligned with ASEAN market needs, strengthening partnerships with startups, universities, and other ecosystem stakeholders, and driving the creation of emerging solutions that contribute to the Kurita Group’s growth.

Mr. Teramoto holds a Master’s degree in Biosystem Studies from the University of Tsukuba, Japan. Leveraging his expertise in both research and development and business strategy, he is committed to driving innovation that transforms technology into business value and sustainable growth opportunities.

Zackariya

Mohamad Zackariya

Managing Director, Kurita (Singapore) Pte. Ltd.

Mr. Mohamad Zackariya has served as Managing Director of Kurita (Singapore) Pte. Ltd. since April 2023, capping a distinguished career of more than 25 years with the company. A Singaporean national, he joined Kurita Singapore in 1998 as a Design Engineer in the Plant Division and progressed through a series of leadership roles, including Manager, General Manager, Director, and ultimately Managing Director. His extensive experience has played a key role in strengthening the company’s technical capabilities, customer partnerships, and business growth across the region.

Holding a Bachelor’s Degree in Mechanical Engineering from University of Moratuwa, Sri Lanka and a Post Graduate Diploma in Business Management from Singapore Institute of Management, Mr. Zackariya combines deep technical expertise with strong business leadership. He is committed to advancing Kurita’s mission of creating shared value through innovation, operational excellence, and sustainable water solutions that support customers and industries throughout Southeast Asia.

Masato Hirai

Masato Hirai

Chief Administration Officer, ASEAN Regional

Mr. Masato Hirai serves as ASEAN Regional Chief Administration Officer at Kurita, a role he has held since 2023. With more than 25 years of experience in corporate administration, financial planning, and business operations, he brings extensive expertise in supporting organizational growth, strengthening governance, and driving operational excellence across international business environments.

Mr. Hirai joined Kurita Group in 2021 and has held leadership positions in Japan, Malaysia, Thailand, and Indonesia. Throughout his career, he has been responsible for financial planning and analysis, business administration, and the management of cross-functional corporate operations. He has also supported overseas subsidiaries across Asia, Europe, and North America, contributing to the development of effective business practices and strong stakeholder relationships. Prior to joining Kurita, he held management and planning roles at several multinational manufacturing and chemical companies.

Known for his strategic vision and collaborative approach to leadership, Mr. Hirai is committed to strengthening organizational performance and creating long-term sustainable growth. Currently based in Indonesia, he leverages extensive international experience to support Kurita’s regional development and business transformation initiatives. He graduated from Hitotsubashi University, Japan, with a Bachelor of Social Sciences degree in 1999.

Toshiaki Nakai

Toshiaki Nakai

General Director, Kurita-GK Vietnam Co. Ltd.

Mr. Toshiaki Nakai serves as General Director of Kurita-GK Vietnam Co. Ltd., a position he has held since April 2026. With more than 20 years of experience at Kurita, he has developed extensive expertise in water treatment solutions, business development, and customer partnership management across a wide range of industrial sectors, including general manufacturing, oil refining, and steel production.

Since joining Kurita Water Industries Ltd. in 2004 as a Sales Engineer, Mr. Nakai has supported customers in optimizing water use, enhancing operational efficiency, and advancing sustainability initiatives. He later expanded his leadership responsibilities in Indonesia, serving as General Manager of PT. Kurita Indonesia from 2022 to 2025 and Senior General Manager from 2025 to 2026, where he contributed to the company’s growth and strengthened its market presence.

Mr. Nakai holds a Bachelor’s Degree in Agriculture from Kobe University, Japan, graduating in 2004.

Toshinori Maema

Toshinori Maema

President Director, P.T. Kurita Indonesia

Mr. Toshinori Maema has served as President Director of PT. Kurita Indonesia since 2025, bringing over 20 years of experience in sales, marketing, technical, and business leadership within the water treatment industry. Having worked across Asia, Europe, and North America, he offers a global perspective on customer engagement, organizational development, and sustainable business growth.

Since joining the Kurita Group in 2004, Mr. Maema has held leadership positions at various Kurita companies in China, Europe, Japan, and Avista Technologies in the United States, where he served as President & CEO from 2023 to 2025 to focus on global initiatives to expand the Kurita reverse osmosis chemicals business. With more than half of his career spent outside Japan, he has developed extensive experience in leading multicultural teams and driving business growth across diverse markets.

Mr. Maema holds a degree in Biochemistry from Aoyama Gakuin University and completed the Leadership on Change program at IESE Business School. Fluent in Japanese, English, and Chinese, with elementary proficiency in German, he is passionate about fostering collaboration across cultures. Outside of work, he enjoys a wide range of sports, including golf, baseball, soccer, and basketball.