Sugar manufacturing companies (cane sugar/beet sugar/molasses)

I. Customer Pain Points

Sugar manufacturers (cane sugar, beet sugar, molasses processing) face three core challenges in the clarification, decolorization, and refining processes: difficulty in removing pigments, significant sugar loss, and environmental compliance pressures. These challenges directly threaten product quality and cost competitiveness.

ncomplete Pigment Removal Leads to Substandard Whiteness: Cane/beet sugar juice contains caramel color (500-2000 mg/L), melanoidins (300-1500 mg/L), and chlorophyll (50-300 mg/L). Traditional sulfidation methods can only remove 40% of the pigments, resulting in white sugar whiteness <85% (National Standard GB 317-2018 requires ≥90%). A sugarcane sugar factory, a client of Shanxi Xinhua Charcoal Technology, had 10 tons of white sugar returned due to substandard whiteness, resulting in a loss exceeding 500,000 yuan.

High sugar adsorption loss and low yield: Traditional powdered activated carbon (PAC) has an adsorption rate of >15% for sugar (e.g., 18% loss for sucrose), resulting in a 50kg decrease in sugar yield per ton. A beet sugar factory, a client of Shanxi Xinhua Carbon Technology, lost over 300 tons of sugar annually, worth over 1.5 million yuan.

Molten wastewater is difficult to treat and incurs high environmental costs: Molasses processing wastewater contains high concentrations of organic matter (COD 5000-20000mg/L, such as residual sugar and caramel color) and pigments (concentration 1000-5000mg/L). It must meet the "Emission Standard of Pollutants for Sugar Industry" (GB 21909-2008) of "COD ≤100mg/L, color ≤50 times"—traditional "biochemical + Fenton" methods have a removal rate of <30% for recalcitrant pigments, resulting in annual environmental fines of up to 200,000 yuan per enterprise (2022 industry data).

II. Application Objectives

The four core objectives for sugar manufacturers using activated carbon are: achieving whiteness standards, preserving sugar content, ensuring compliance, and reducing costs: Deep decolorization to ensure whiteness standards are met. Food-grade wood-based powdered activated carbon (PAC, 200 mesh) precisely adsorbs caramel color, melanoidins, and chlorophyll in sugar juice, achieving a removal rate >99% and increasing whiteness to ≥92% (better than the national standard GB 317-2018). A sugarcane factory, a partner of Shanxi Xinhua Carbon Technology, saw its whiteness compliance rate increase from 70% to 99% after using the activated carbon.

Reduced sugar adsorption, increased yield: The developed low-sugar adsorption activated carbon (specific surface area 800-1000 m²/g, ash content ≤3%) reduces the adsorption rate of sucrose/beet sugar to <5% (compared to 18% for traditional PAC), increasing the sugar yield by 45 kg per ton. A beet sugar factory, a client of Shanxi Xinhua Carbon Technology, has seen an increase in annual sugar production of 270 tons, valued at over 1.35 million yuan.

Strict compliance, avoiding environmental penalties: Meets global sugar industry standards:
China GB 21909-2008: COD ≤100 mg/L, color ≤50 times;
EU EC 178/2002 Food Regulation: Pigment residue ≤0.1 mg/kg;
US FDA 21 CFR Part 173.45: Activated carbon must be food grade (heavy metals ≤0.005%).

After using the activated carbon process, a molasses processing plant, a client of Shanxi Xinhua Activated Carbon Technology, saw its wastewater COD drop from 15,000 mg/L to <80 mg/L, and its annual environmental fines decrease from 200,000 yuan to zero.

Reducing decolorization costs and replacing high-energy-consuming processes: The operating cost of the activated carbon process is only 0.5-1.0 yuan/ton of sugar juice (one-third of that of the ion exchange method), and it can be regenerated 3-5 times (regeneration cost is 30% of that of new carbon). — A sugarcane factory, a client of Shanxi Xinhua Activated Carbon Technology, saw its annual decolorization cost decrease from 800,000 yuan to 300,000 yuan, a reduction of 62.5%.

III. Application Significance

The application of activated carbon in sugar manufacturing enterprises is a core support for their "quality baseline + cost leadership + compliant survival":

Quality Baseline: Globally, 60% of sugar manufacturers have their products returned due to "non-whiteness standards." Activated carbon is one of the few technologies that can simultaneously remove caramel color, melanin, and chlorophyll while retaining sugar content, directly avoiding the risk of "product scrap" (e.g., a sugar factory, a client of Shanxi Xinhua Carbon Technology, saved 500,000 yuan/year after using it).

Cost Leadership: With the sugar adsorption loss rate reduced from 18% to 5%, a beet sugar factory, a client of Shanxi Xinhua Carbon Technology, increased its annual profit by 1.35 million yuan, equivalent to a 2 percentage point increase in gross profit margin.

Compliant Survival: In 2022, 55% of environmental penalties in the sugar industry were due to "excessive COD/color." Activated carbon is one of the few technologies that can simultaneously treat high concentrations of organic matter and pigments at a controllable cost, directly avoiding "production shutdowns and rectification" (one company was shut down for one month due to excessive COD, resulting in losses exceeding 2 million yuan).

IV. Application History

The application of activated carbon in sugar manufacturing enterprises has deepened with the increasing demands for both whiteness and sugar retention:

1950s: Initial Stage Domino Sugar in the United States was the first to use wood-based powdered activated carbon (PAC, 100 mesh) to treat sugarcane juice (containing 1000 mg/L of caramel color). Through adsorption-filtration, they increased the whiteness from 80% to 88%, becoming the world's first case of using activated carbon to improve sugar whiteness.

2020s: Intelligent Stage China's "14th Five-Year Plan for the Development of the Food Industry" requires a "sugar wastewater reuse rate ≥ 50%". Activated carbon, combined with an "online color monitoring + automatic dosing" system, achieves precise decolorization (e.g., automatically adjusting the PAC dosage based on the caramel color concentration of the sugar juice), reducing operating costs by 25%.

V. Mechanism of Action

Activated carbon solves the problems of "difficult decolorization, sugar loss, and wastewater treatment" in sugar production through a triple action of "physical adsorption + chemical selectivity + low sugar loss":

1. Physical Adsorption: "Targeted Sieving" of the Pore Structure

Micropores (<2nm): Accounting for 70%-80% of the total pore volume, they adsorb small molecule pigments (caramel color ≈ 0.6nm, melanoidins ≈ 0.8nm, chlorophyll ≈ 0.9nm) through van der Waals forces, with an adsorption capacity of 300-500mg pigment/g char (5 times that of the sulfidation method).

Mesopores (2-50nm): Serving as "transport channels," they allow medium-molecular-weight organic matter (residual sugar ≈ 0.5nm, organic acids ≈ 0.6nm) to diffuse into the micropores, but the adsorption of sugar is reduced through pore size regulation (micropore proportion ≤ 70%). 1. **Large Pores (>50nm):** Serving as an "inlet channel," allowing large suspended molecules (>1μm) to enter the activated carbon interior, reducing the load on subsequent filtration.

2. Chemical Selectivity: Surface functional groups enable sugar retention.

The oxygen-containing functional groups (carboxyl-COOH, hydroxyl-OH) on the activated carbon surface repel sugar molecules (sucrose ≈0.5nm, beet sugar ≈0.5nm) through electrostatic repulsion, reducing sugar adsorption rate to <5% (compared to 18% for traditional PAC).

3. Synergistic Regeneration: A crucial step in cost reduction.

Powdered activated carbon (PAC), after being mixed with molasses sludge, is regenerated through high-temperature incineration (850℃), achieving a heat recovery rate >80%. The ash residue can be used as fertilizer raw material (containing ≥5% potassium). Granular Activated Carbon (GAC): Through steam regeneration (180-200℃, 0.3MPa), adsorbed pigments are desorbed into gaseous organic matter, which is then incinerated in a boiler (calorific value ≥15000kJ/kg). The regenerated carbon's adsorption capacity is restored to 85% of that of new carbon, and the cost is only 30% of that of new carbon.

VI. Application Methods

Sugar manufacturing enterprises adopt a combined process of "sugar juice decolorization (PAC) + molasses wastewater treatment (GAC)," covering all scenarios of "cane sugar, beet sugar, and molasses processing":

1. Sugar Juice Decolorization: Food-grade PAC adsorption

• Applicable Scenarios: Cane sugar juice (caramel color 500-2000mg/L, whiteness <85%), beet sugar juice (melanoidins 300-1500mg/L, whiteness <88%). Process Steps:
• Pretreatment: Sugar juice → Clarification tank (removal of suspended solids, SS ≤ 50 mg/L) → pH adjustment (adjusted to 7-8 with lime milk).
• PAC Adsorption: Clarified sugar juice enters the adsorption tank, and 50-100 mg/L of food-grade wood-based PAC (200 mesh, iodine value ≥ 1000 mg/g, ash content ≤ 3%) is added. Stirring for 20 minutes results in whiteness ≥ 92% and pigment removal rate > 99%.
• Separation: PAC and sugar juice are separated using a plate and frame filter press (filter cake moisture content ≤ 60%).

Key Parameters:

• PAC Specifications: Wood-based, heavy metals ≤ 0.005% (compliant with FDA 21 CFR Part 173.45);
• Adsorption Capacity: Caramel color ≥ 300 mg/g, melanoidins ≥ 200 mg/g;
• Sugar Adsorption Rate: < 5% (sucrose/beet sugar).

2. Molasses Wastewater Treatment: GAC Deep Purification

Applicable Scenarios: Molasses processing wastewater (COD 5000-20000mg/L, color 1000-5000 times).

Process Steps:

• Pretreatment: Molasses wastewater → Coagulation and sedimentation (PAC 50mg/L + PAM 2mg/L, to remove suspended solids).
• GAC Adsorption: The effluent from the sedimentation enters a fixed-bed GAC tower (filled with coconut shell activated carbon, Φ3-6mm, iodine value ≥1100mg/g), empty bed flow rate 5-10m/h, contact time 20-30 minutes, COD reduced to <80mg/L, color <50 times.

VII. Application Process

Taking a sugarcane sugar mill (daily sugarcane processing capacity 5000 tons, juice containing 1000 mg/L caramel color and 82% whiteness) as an example (a cooperative client of Shanxi Xinhua Charcoal Technology):

Juice Pretreatment: Sugarcane pressing juice → Clarification tank (removal of suspended solids, SS ≤ 30 mg/L) → pH adjustment to 7.5 with lime milk.

PAC Decolorization: Clarified juice enters adsorption tanks (2 tanks, 500 m³ each), woody PAC (200 mesh, 50 mg/L) is added, mechanically stirred for 20 minutes → separation by plate and frame filter press (filter cake moisture content 55%) → juice whiteness 92%, caramel color < 10 mg/L.

Syrup Refining: Decolorized juice → Evaporator (concentrated to 65°Bx) → Crystallization tank → Centrifugation → White sugar (whiteness 92%, conforming to GB 317-2018). Molasses Wastewater Treatment: Molasses wastewater → Coagulation sedimentation tank (PAC 50mg/L + PAM 2mg/L) → GAC tower (2 units, each with 20 tons of charcoal, coconut shell charcoal Φ3-6mm) → Effluent COD < 80mg/L, color < 50 times → Discharge/Reuse (reuse rate 40%).

Regeneration and Reuse:
GAC saturation → Steam regeneration furnace (180℃, 0.3MPa) → Desorption gas sent to boiler for incineration → Regenerated charcoal returned to the GAC tower.

PAC filter cake → Plate and frame filter press (moisture content 55%) → High-temperature incinerator (850℃) → Ash residue for potassium fertilizer (potassium content 5%).

VIII. Application Effects

After the renovation of a sugarcane factory, the core indicators were significantly improved (based on actual operating data from a client of Shanxi Xinhua Charcoal Technology):

Indicators	Before the modification (vulcanization method)	After modification (food-grade PAC+GAC)	Increase/Decrease:	Compliance Status
Whiteness of Sugar (%)	82	92	Increase by 12.2%	Complies with GB 317-2018
Caramel Color Removal Rate (%)	40	99	Increase by 147.5%	—
Sugar Adsorption Loss Rate (%)	18	4	Decrease by 77.8%	—
Wastewater COD (mg/L)	15000	＜80	Decrease by 99.5%	Complies with GB 21909-2008
Annual Decolorization Cost (Ten Thousand Yuan)	80	30	Decrease by 62.5%	—
Annual Sugar Loss (tons)	300	67	Decrease by 77.7%	—

IX. Core Advantages

Our customized solutions for sugar manufacturing enterprises possess four irreplaceable advantages:
Highly Targeted Products, Matching Sugar Manufacturing Needs: Our developed wood-based food-grade PAC (200 mesh, iodine value ≥1000mg/g, ash content ≤3%) specifically adsorbs caramel color and melanoidins, achieving a pigment removal rate >99%. Our low-sugar adsorption activated carbon has a sugar adsorption rate of <5% (compared to 18% for traditional PAC). After using it, a beet sugar factory, a client of Shanxi Xinhua Charcoal Technology, saw its sugar loss rate decrease from 18% to 4%.

Achieving Whiteness Standards, Enhancing Product Competitiveness: The whiteness of the sugar juice increased from <85% to ≥92% (better than the national standard GB 317-2018). After using it, a sugarcane sugar factory, a client of Shanxi Xinhua Charcoal Technology, saw its whiteness qualification rate increase from 70% to 99%, and customer repurchase rate increased by 15%.

Compliant and Reliable, with Full Qualification Coverage: The product has passed GB 29215-2012 "Food Additives - Activated Carbon", FDA 21 CFR Part 173.45, and EU EC 178/2002 certifications, fully meeting global sugar industry standards. A molasses processing plant, a client of Shanxi Xinhua Carbon Technology, achieved a 100% COD compliance rate in its wastewater after using the product.

Controllable Costs, High Cost-Effectiveness Throughout the Life Cycle:

• PAC: Added on demand, operating cost 0.5-1.0 RMB/ton of sugar juice (1/3 of the cost of ion exchange method);
• GAC: Can be regenerated 3-5 times (regeneration cost is 30% of new carbon). A sugarcane sugar mill, a client of Shanxi Xinhua Carbon Technology, reduced its annual decolorization cost by 62.5% (from 800,000 RMB to 300,000 RMB).

X. Cost Analysis

A cost comparison between activated carbon and traditional processes, using a sugarcane sugar mill with a daily processing capacity of 5,000 tons of sugarcane: 

Project	Activated carbon (PAC+GAC) process	Sulfidation method + biochemical process
Initial Investment (RMB 10,000)	100-150	80-120
Operating Cost (RMB/ton of syrup)	0.5-1.0	1.5-2.0
Maintenance Cost (RMB 10,000/year)	20-30	50-80
Total Life Cycle Cost (RMB/ton of syrup)	1.0-1.5	3.0-4.0
Sugar Loss Cost (RMB 10,000/year)	13.4	60

XI. Why Choose Us?

Performance Endorsement: Our activated carbon has received unanimous praise for its thorough decolorization and sugar retention. A sugarcane factory, a client of Shanxi Xinhua Carbon Technology, saw its whiteness increase from 82% to 92% after using our food-grade PAC, saving 233 tons of sugar annually, a value exceeding 1.16 million yuan.

Technical Strength: In collaboration with South China University of Technology (School of Light Industry Science and Engineering), we have developed "wood-based food-grade PAC" and "low-sugar adsorption activated carbon," specifically targeting the sugar industry's "high whiteness, low sugar loss" problem. Our products boast a sugar adsorption rate of <5% and a pigment removal rate of >99%, perfectly matching sugar production needs.

Global Service: We have production bases in Shanxi, Ningxia, and Fujian (annual capacity of 45,000 tons), supporting "customized production + localized delivery." For overseas clients, we offer a full-process service including "activated carbon selection + decolorization process design + regeneration solutions," ensuring a response time of 72 hours.