Aluminum Chlorohydrate (ACH) Manufacturer & Suppliers serving Sri Lanka

1. Sri Lanka's Unique Industrial Water and Raw Water Challenges

Sri Lanka's water treatment infrastructure operates in a highly dynamic tropical ecosystem. With raw water drawn heavily from major river basins such as the Kelani Ganga, Kalu Ganga, and Mahaweli Ganga, water treatment plants constantly struggle with severe variations in turbidity. During the monsoon seasons, turbidity in these surface water sources can spike from 5 NTU to well over 1000 NTU in a matter of hours.

Furthermore, major industrial corridors like the Biyagama and Katunayake Export Processing Zones (EPZs) host massive textile dyeing and garment processing factories. The textile effluent from these sites contains highly complex dyes, chemical finishing agents, and varying pH levels that traditional alum-based systems fail to precipitate efficiently. Standard aluminum sulfate requires significant chemical additions for pH adjustment, generating vast amounts of unstable hydroxide sludge that is costly to treat and dump in landfills.

2. Chemical Mechanism: Aluminum Chlorohydrate (ACH) vs. Traditional Coagulants

ACH is characterized by the general formula $Al_2(OH)_5Cl\cdot 2H_2O$. With an equivalent $Al_2O_3$ content of 23% to 24% for the liquid form and 46% to 48% for the powder form, it delivers the highest density of positive charges of any commercially available inorganic monomeric or polymeric aluminum coagulant.

When introduced to water containing suspended colloidal particles, the pre-formed polynuclear complexes ($Al_{13}$ and $Al_{30}$ polymers) adsorb rapidly onto particle surfaces. This initiates immediate charge neutralization and micro-floc formation. The high basicity means the hydrolysis process is nearly complete upon application, preventing the pH of the treated system from dropping. Below is a comparative overview of operational metrics:

3. Localized Application Map in Sri Lanka Industries

For Sri Lanka's domestic water security, compliance with NWSDB (National Water Supply & Drainage Board) drinking water standards is paramount. Traditional alum treatment leaves residual aluminum in treated water if the plant pH shifts outside the optimal operating window. ACH operates reliably within a wide pH range (5.5 - 9.0), guaranteeing that dissolved residual aluminum stays well below the 0.2 mg/L limit, reducing public health risks.

In industrial effluent management, particularly for garment washing and textile print shops in industrial estates such as Avissawella and Horana, ACH serves as a primary coagulant to destabilize disperse and reactive dyes. When combined with our specialty high-efficiency water decoloring agents and anionic polyacrylamides (APAM), the color and COD levels are reduced to within national environmental authority (CEA) discharge thresholds within minutes of rapid mixing, keeping textile operations legally compliant.