Mechanical Filter,activity Carbon Filter and Softening One Stage Reverse Osmosis with Aseptic Pure Water tank Plastic Water tank

Product description

1、 Core Component Functions and System Processes

1. Mechanical Filter
Function: By physically intercepting and removing large particles such as suspended solids, sediment, rust, colloids, etc. from raw water, turbidity is reduced (usually from 20NTU to below 5NTU).
Type: Common multi-media filters (filled with quartz sand, anthracite) or self-cleaning filters (filter mesh accuracy 50-100 μ m).
Working mode: automatic backwash (pressure difference>0.05MPa or timed trigger), backwash intensity 15-20L/(m ² · s), lasting for 5-10 minutes.
2. Activated Carbon Filter
Function: Utilizing the adsorption properties of activated carbon, remove residual chlorine, organic matter (such as pesticides and humic acid), pigments, and odors from water, and protect reverse osmosis membranes from oxidative damage.
Technical parameters:
Coconut shell activated carbon has a specific surface area of ≥ 1000m ²/g and an adsorption efficiency of>99% for residual chlorine.
The residual chlorine in the effluent is ≤ 0.1mg/L, and the total organic carbon (TOC) is ≤ 3mg/L.
Maintenance: Replace activated carbon once a year or restore adsorption capacity through regeneration equipment.

3. Softening device
Function: Remove calcium (Ca ² ⁺) and magnesium (Mg ² ⁺) ions from water through ion exchange resin, reduce hardness (such as from 200mg/L to below 5mg/L), and prevent reverse osmosis membrane fouling.
working principle:
Exchange of calcium and magnesium ions between resin and water: 2R Na+Ca ² ⁺ → R ₂ – Ca+2Na ⁺.
Automatic regeneration: Reduce the resin with 8% -10% NaCl solution, and set the regeneration cycle according to the water consumption (such as regenerating once every 50m ³ of water treated).
4. One Stage Reverse Osmosis (RO)
Function: Driven by a high-pressure pump (0.8-1.5MPa), deep desalination is achieved through a reverse osmosis membrane to remove dissolved salts, bacteria, viruses, etc. The desalination rate is 95% -98%, and the conductivity of the produced water is ≤ 50 μ S/cm (when the TDS of the raw water is less than 2000mg/L).
Key components:
Roll type composite film (such as Heideneng ESPA), with a single film production rate of 0.5-1m ³/h.
The discharge ratio of concentrated water is 20% -30%, and the recovery rate can be adjusted through the concentrated water valve (usually 60% -80%).
5. Aseptic Pure Water Tank
Function: Store RO produced water to prevent secondary pollution, suitable for scenarios with high requirements for microbial indicators (such as food and medicine).
Design features:
Material: 316L stainless steel or food grade PE, with electrolytic polishing on the inner wall (roughness Ra ≤ 0.6 μ m).
Supporting equipment: air respirator (filtration accuracy 0.22 μ m), spray cleaning system (regular CIP cleaning), UV sterilizer (254nm wavelength, irradiation intensity ≥ 30mJ/cm ²).
6. Plastic Water Tank
Function: Used for storing raw or concentrated water, economical and practical, suitable for non drinking water scenarios such as irrigation and cooling.
Material and specifications:
Material: Food grade polyethylene (PE), in compliance with GB 9687 standard.
Capacity: 1-100m ³, cylindrical design, strong impact resistance, acid and alkali resistance (pH 4-10).

2、 System Process and Water Quality Control
1. Complete processing flow
plaintext
Raw water → mechanical filter (to remove large particles) → activated carbon filter (to remove residual chlorine/organic matter) → softening device (to remove hardness) → primary reverse osmosis (desalination) → sterile pure water tank (to store high-purity water)/plastic water tank (to store raw water/concentrated water)
2. Key nodes of water quality
Turbidity (NTU), hardness (mg/L), residual chlorine (mg/L), conductivity (μ S/cm), total bacterial count (CFU/mL) during the processing stage
Raw water ≤ 20 ≤ 300 ≤ 1.0 ≤ 2000 ≤ 1000
Mechanical filtration ≤ 5 ≤ 300 ≤ 1.0 ≤ 1800 ≤ 500
Softening+RO water production ≤ 1 ≤ 5 ≤ 0.05 ≤ 50 ≤ 10
Sterile water tank effluent ≤ 1 ≤ 5 ≤ 0.05 ≤ 50 ≤ 1 (national standard requirement)
3、 Application scenarios and selection suggestions
1. Typical application areas
Food and beverage industry:
A sterile pure water tank is used to store water for beverage preparation (in accordance with GB 17324 standard for bottled (barrel) drinking pure water).
Plastic water tanks store raw water or cleaning water (such as equipment flushing).
Pharmaceutical industry:
The first level RO produced water is used as purified water raw water (subsequent docking with EDI or multi effect distillation is required).
The sterile water tank is equipped with an online TOC detector and a microbiological monitoring system.
Civilian water purification:
Rural well water purification: mechanical filtration+activated carbon to remove iron and manganese/odors, RO to remove nitrate.
Commercial water purifier: equipped with a small sterile water tank, providing direct drinking water (such as in schools and office buildings).
2. Comparison of water tank selection
Type, Material, Applicable Scenarios, Advantages and Disadvantages
Aseptic pure water tank made of 316L stainless steel/food grade PE high-purity water (for medicine and food) is corrosion-resistant and easy to clean, but the cost is high (stainless steel water tank prices are 30% -50% higher than PE).
Plastic water tank made of polyethylene (PE) for raw water storage, concentrated water temporary storage, low irrigation cost, light weight, but not resistant to high temperatures (≤ 60 ℃), and long-term use may release plasticizers (non food grade).
3. System expansion configuration
Microbial control: Install a UV sterilizer (power 30-50W) or ozone generator (concentration 0.3-0.5mg/L) at the RO water production end to ensure the quality of the sterile water tank.
Energy saving design: The high-pressure pump adopts frequency conversion control, which automatically adjusts the speed according to the water tank level, reducing energy consumption by about 20%.
Concentrated water treatment: Plastic water tanks collect RO concentrated water for landscaping irrigation in the park (salt content needs to be tested to meet plant growth requirements).

4、 Maintenance and troubleshooting
1. Key points of daily maintenance
Mechanical filter: Check the loss of filter material every month and replenish quartz sand/anthracite.
Activated carbon filter: Check the residual chlorine in the effluent every quarter, and replace the activated carbon when it exceeds the standard.
Softening device: Check the resin exchange capacity every six months, and replace the resin when it is below 70%.
RO system: Chemical cleaning is carried out quarterly (acidic cleaning: 2% citric acid; alkaline oil removal: 1% NaOH).
Water tank: The sterile water tank undergoes CIP cleaning every quarter (80 ℃ hot water+0.1% sodium hypochlorite), while the plastic water tank is cleaned once a year.
2. Common faults and solutions
Possible causes and solutions for the fault phenomenon
RO water production rate decreases, membrane surface pollution/low inlet water temperature, chemical cleaning of membrane/raising water temperature to above 15 ℃
Resin failure/abnormal regeneration program due to excessive hardness of softened water, resin replacement/reset regeneration parameters
Sterile water tank water quality, bacteria growth, air respirator blockage/incomplete cleaning, replacement of filter element/increased cleaning frequency
Plastic water tank leakage interface loose/material aging, broken fastening bolts/replacement of water tank
5、 Environmental and safety precautions
Concentrated water discharge: RO concentrated water has a high salt content, and direct discharge must comply with GB 8978 “Comprehensive Wastewater Discharge Standard”. It is recommended to reuse it for greening or mix it with other wastewater for treatment.
Chemical agent management: Softening regenerated salt and RO membrane cleaning agent should be stored separately to avoid contact with children. Waste liquid should be poured into a dedicated collection tank.
Plastic water tank safety: Food grade PE water tanks must pass hygiene license certification, and non food grade water tanks are not allowed to be used for storing drinking water.
summarize
This water treatment system uses a multi-stage treatment process of “mechanical filtration+activated carbon adsorption+softening+RO”, combined with water tanks of different materials to meet diverse storage needs, and is suitable for scenarios that are sensitive to water quality, microorganisms, and costs. A sterile pure water tank ensures the safety of high-purity water, while a plastic water tank provides an economical water storage solution. The combination of the two can optimize the cost-effectiveness of the system. In practical applications, it is necessary to flexibly adjust the configuration according to the quality of raw water and industry standards, and maintain it regularly to ensure long-term stable operation.