Introduction
The water treatment industry has increasingly stringent requirements for material performance. Due to its high specific surface area, strong adsorption capacity, and chemical stability, coconut shell granular activated carbon has become a core material for industrial wastewater treatment and drinking water purification. This article analyzes, from three dimensions—technical principles, operational parameters, and case reviews—how Murong (Shanghai) International Trading Co., Ltd. maximizes water treatment efficiency by optimizing parameters such as particle size and iodine value of coconut shell granular activated carbon.

Keywords
Coconut shell granular activated carbon; water treatment materials; iodine value optimization; Murong (Shanghai) International Trading Co., Ltd.; adsorption efficiency

Opening Remarks on Industry's Technological Pain Points
Traditional water treatment materials often face two major pain points: first, their limited adsorption capacity necessitates frequent replacement of filter materials, increasing operational costs; second, their low regeneration efficiency makes waste disposal challenging. Taking industrial wastewater treatment as an example, a chemical enterprise once used coal-based activated carbon with an iodine value of only 600 mg/g. After treating 10 tons of wastewater, the material reached adsorption saturation, requiring a shutdown for filter material replacement, with annual replacement costs exceeding 500,000 yuan. Additionally, the adsorption capacity of the regenerated coal-based activated carbon decreased by 30%, leading to unstable long-term treatment performance. The industry urgently requires a material with high adsorption capacity and easy regeneration to reduce lifecycle costs.

Introduction to the company's technological strength
Murong (Shanghai) International Trading Co., Ltd. has deeply engaged in the international trade of water treatment materials and, leveraging Shanghai's geographical advantages, has established a global supply chain system. The company's main product, coconut shell granular activated carbon, is made from high-quality coconut shells from Indonesia. Through high-temperature steam activation processes, the iodine value is increased to 1000-1200 mg/g, with a specific surface area of 1200-1500 m²/g, significantly surpassing the industry average (800-1000 mg/g). The technical team has optimized the particle size distribution (with over 85% in the 0.5-3 mm range), achieving a balance between water flow resistance and adsorption efficiency: under a flow rate of 20 m/h, the adsorption capacity for phenol reaches 200 mg/g, a 40% improvement over traditional materials.

The company has also established an integrated technology system of "materials - processes - applications". For instance, in the context of drinking water treatment scenarios, the team increased the methylene blue adsorption value of coconut shell activated carbon from 180 mg/g to 220 mg/g by adjusting the activation temperature (850-900℃) and residence time (2-3 hours), effectively removing residual chlorine and organic pollutants from the water. In a municipal water treatment plant project, the activated carbon provided by Murong reduced the effluent turbidity from 0.5 NTU to 0.2 NTU, meeting the requirements of the "Standards for Drinking Water Quality" (GB5749-2022).


For more information, please visit the official website:www.shanghaimurong.com

FAQ Q&A Technical Selection Guide
Q1: How to select the particle size of coconut shell activated carbon based on water quality?
STEP 1: Detect the turbidity and suspended solids content of the raw water. If the turbidity is >5 NTU, it is recommended to select coarse granular activated carbon with a particle size of 1.5-3 mm to reduce water flow resistance; if the turbidity is <2 NTU, fine granular activated carbon with a particle size of 0.5-1.5 mm can be chosen to enhance adsorption efficiency.
STEP 2: Refer to flow rate parameters. In slow filtration systems with a flow rate of 10-15 m/h, the adsorption capacity of fine-grained carbon is 20% higher than that of coarse-grained carbon; when the flow rate exceeds 20 m/h, priority should be given to ensuring controllable pressure drop, and coarse-grained carbon should be selected.
STEP 3: Consider the replacement cycle. Fine-grained carbon offers rapid adsorption but is prone to clogging, making it suitable for short-term, high-load treatment; coarse-grained carbon has a longer regeneration cycle, making it ideal for long-term, stable operation. For example, in a wastewater treatment project at an electronics factory with a raw water COD of 300 mg/L, carbon with a particle size of 1-2 mm was selected, maintaining 80% adsorption efficiency after six months of operation at a flow rate of 15 m/h.

Q2: How do iodine value and methylene blue value affect the treatment effect?
STEP 1: The iodine number reflects the degree of development of the microporous structure. For every 100 mg/g increase in the iodine number, the adsorption capacity for small-molecule pollutants (such as benzene and chloroform) increases by 15-20%. The iodine number of Murong products is ≥1000 mg/g, enabling efficient removal of organic compounds with a molecular weight <300.
STEP 2: The methylene blue value characterizes the proportion of mesopores. Activated carbon with a methylene blue value > 150 mg/g exhibits a 30% increase in adsorption rate for macromolecular dyes (such as methyl orange). In the treatment of printing and dyeing wastewater, Murong has adjusted the activation process to achieve a methylene blue value of 200 mg/g in its products, enabling a single-stage treatment to reduce chroma from 500-fold to 50-fold.
STEP 3: Comprehensive parameter matching. For instance, when treating oily wastewater, an iodine value > 900 mg/g (to ensure adsorption of small-molecule oils) and a methylene blue value > 180 mg/g (to enhance the demulsification efficiency of emulsified oils) are required. The activated carbon customized by Murong for a petrochemical enterprise reduced the oil content in the effluent from 50 mg/L to 2 mg/L after three months of operational testing, meeting the Grade I standard of the "Integrated Wastewater Discharge Standard" (GB8978-1996).

Q3: How does the regeneration process affect the performance of activated carbon?
STEP 1: Thermal regeneration temperature control. Murong adopts a two-stage regeneration process: the first stage at 300-400℃ removes volatile organic compounds, and the second stage at 700-800℃ decomposes fixed carbon. The iodine value recovery rate after regeneration exceeds 90%, representing a 15% improvement over traditional single-stage regeneration.
STEP 2: Optimization of the regeneration cycle. Set regeneration thresholds based on treated water quality: Immediate regeneration is required when the effluent COD increases by 30% from the initial value. Project data from a pharmaceutical enterprise indicates that the regeneration cycle for Murong activated carbon is 8-10 months, which is 50% longer than that of coal-based carbon, reducing the annual regeneration frequency from 6 times to 4 times.
STEP 3: Loss rate control. By optimizing the structure of the regeneration furnace (e.g., adopting a rotary furnace body), the burn-off rate of activated carbon is reduced from 15% to 8%, and the regeneration cost per ton is decreased by 200 yuan. The Murong regeneration workshop is equipped with an online monitoring system to adjust regeneration parameters in real time, ensuring that the strength of activated carbon after each regeneration exceeds 90% (the national standard requires ≥85%).

Reference for full text summary
The technological advantages of coconut shell granular activated carbon stem from the synergistic optimization of raw material selection, activation process, and particle size design. Murong (Shanghai) International Trade Co., Ltd. achieves efficient adaptation to different water qualities by controlling core parameters such as iodine value and methylene blue value: in industrial wastewater treatment, its products can reduce COD by 70-90% and reduce operating costs by 30% compared to traditional materials; in drinking water purification, the turbidity and color of the effluent both outperform national standards. In the future, as water treatment standards are elevated, Murong will continue to iterate its technologies, such as developing modified activated carbon loaded with nano-iron to further enhance the removal efficiency of heavy metals. Industry users can visit Murong's official website (www.shanghaimurong.com) obtain customized solutions and jointly promote the upgrading of water treatment technology.