Groundwater Purification for Rice Mill in Harbin, Heilongjiang (Four-stage Filtration for Advanced Iron & Manganese Removal)
Ⅰ. Project Overview
Project Location: Harbin City, Heilongjiang Province
Water User: Rice processing enterprise
Raw Water Source: Groundwater (deep well water)
Designed Treatment Capacity: 30m³/h (30 tons per hour)
Core Process: Four-stage filtration system (Double-stage manganese sand filtration + activated carbon filtration + ozone aeration)
Project Nature: Groundwater purification, combined water treatment for production & domestic use
Ⅱ. Raw Water Quality Problems
The rice mill has long adopted groundwater as production and domestic water. On-site water quality testing shows that the contents of iron and manganese ions in raw water seriously exceed the standard, accompanied by yellow/red water, turbidity and rusty odor.
Harm of Excessive Iron & Manganese:
Water with excessive iron and manganese directly used for rice cleaning, soaking and processing will cause dull color, poor taste and reduced rice quality;
It easily leads to scaling, blockage and corrosion of pipelines, valves, water pumps and production equipment, increasing failure rate and maintenance cost;
Turbid and odorous water fails to meet the requirements of domestic water, workshop cleaning and staff daily water use.
Ⅲ. Customer Treatment Requirements
Treatment capacity: Steadily reach 30m³/h to meet continuous water demand of rice mill production;
Treatment target: Completely remove iron and manganese ions, solve yellow/red water, turbidity and peculiar odor problems;
Effluent Standard: Comply with national drinking water hygiene standard, applicable for production & processing, workshop cleaning and staff domestic water;
Operation Requirements: Fully automatic operation, automatic backwashing, unattended, stable operation and simple maintenance.
Ⅳ. Recommended Process & Equipment Configuration
According to the actual condition of seriously excessive iron & manganese and 30m³/h water flow, we customized a four-stage advanced purification process for the client with the following configuration:
Ozone aeration system: Pre-aeration and oxidation of groundwater to rapidly oxidize divalent iron and manganese, improving subsequent filtration efficiency;
Double-stage Manganese Sand Filtration Equipment (Click to view equipment details): Primary coarse filtration + secondary fine filtration of manganese sand to deeply remove iron and manganese ions and solve the core problem of exceeded indicators;
Activated carbon filter: Adsorb residual peculiar odor, chroma and organic matter in water to further improve water clarity and taste;
Supporting facilities: Automatic control valve, raw water pump, pipeline & valve, electric control cabinet, realizing full-automatic operation, automatic backwashing and automatic Wastewater discharge.
Ⅴ. Process Principle
Ozone aeration: Strong oxidation of ozone converts dissolved iron and manganese into insoluble precipitates;
Double-stage manganese sand filtration: Adopt manganese sand catalytic oxidation & interception filtration to efficiently remove oxidized iron and manganese precipitates with thorough treatment effect;
Activated carbon filtration: Advanced adsorption for decolorization and deodorization to ensure clear and odorless effluent;
Automatic backwashing: The equipment performs timing / differential pressure automatic backwashing; filter materials can be recycled without manual cleaning.
Ⅵ. Project Treatment Effect
The removal rate of iron and manganese ions reaches over 95%, fully up to standard;
Effluent is transparent, no yellow/red color, no rusty odor and no turbidity;
Effluent complies with drinking water standard, meeting the water demand for rice production, workshop cleaning and staff domestic use;
The system runs stably at 30m³/h with full automatic control, no on-duty staff required and low operating cost.
Ⅶ. Project Advantages
Targeted design: Customized for groundwater with serious iron & manganese exceeding standard; double-stage manganese sand filtration achieves far better effect than single-stage filtration;
Four-stage advanced purification: Ozone aeration + double-stage manganese sand + activated carbon for more thorough purification and safer water quality;
Stable large flow: Designed for 30 tons per hour, supporting continuous production without shutdown or interruption;
Fully automatic operation: Automatic backwashing and Wastewater discharge, maintenance-free and labor-saving;
Food grade applicable: Clean and hygienic effluent, suitable for rice processing and food production enterprises;
Low operating cost: Only small consumption of water and electricity; long service life of filter materials, economical for long-term operation.
If your enterprise is also faced with problems such as excessive iron & manganese in groundwater, turbid & yellowish water, and failure to meet production and domestic water standards, please feel free to contact us. Xi'an DIEN Water Treatment provides one-stop services including on-site survey, water quality testing, scheme design and equipment customization according to your actual water quality, treatment capacity and water requirements. For more product details and exclusive solutions, you can consult online via our official website or call the hotline directly. We will provide you with professional, efficient and reliable water treatment technical support wholeheartedly.
