Biofilter Quality Identification

biological filter tower takes the synergy of microbial degradation and gas-liquid mass transfer as its core principle. By optimizing the filler specific surface area, empty bed residence time and pressure drop control, it can achieve efficient treatment of volatile organic compounds, odorous gases and aerosols. It is widely used in the field of waste gas treatment in chemical industry, sewage treatment plants and waste incineration plants. In the petrochemical industry, it is used for deep purification of benzene series/mercaptans; in food processing, it meets the deodorization needs of fermentation waste gas; in municipal facilities, it ensures that the exhaust gas of sludge drying meets the emission standards. Compared with traditional activated carbon adsorption equipment, biological filter towers have the characteristics of low operating costs, wide microbial adaptability, and no secondary pollution (no hazardous waste generation). They are the core equipment of green waste gas treatment.

Zhongke Testing is a product quality appraisal service organization registered with the court. It can provide quality appraisal services for biological filter towers. It has a professional appraisal team and advanced instruments and equipment to provide fair and accurate appraisal results for biofilter tower quality appraisal.

As environmental protection supervision becomes stricter, related quality dispute cases have increased significantly. The judicial dispute focuses on:

1, performance index dispute: VOCs removal rate does not meet the standard, and the pressure drop exceeds the standard;

2, material defects: insufficient filler specific surface area, poor acid and alkali resistance of anti-corrosion coating ;

3, process problems: poor air distribution uniformity, spray system clogging rate;

4, contract performance dispute: core configuration (such as high-efficiency bacterial inoculum, intelligent humidification module) does not comply with the technical agreement.

Biofilter tower quality identification technical methods mainly include:

1. On-site investigation: Check the appearance, structure, nameplate information, operating status, etc. of the equipment.

2. Performance test: simulate real working conditions and test indicators such as exhaust gas treatment efficiency, inlet concentration and outlet concentration.

3. Biological filter material analysis: Collect biological filter material samples and check the filter material type, specific surface area, moisture content, etc.

4. Material testing: Conduct material testing on key components of the equipment to analyze performance indicators such as strength and corrosion resistance.

A chemical factory of the applicant signed a "Purchase Contract for Biological Filters for Benzene Series Treatment" with an environmental protection company of the respondent, agreeing that the VOCs removal rate is ≥95%. After being put into operation, the actual measurement was only 80%, and the manufacturer argued that it was caused by fluctuations in the intake air concentration.

Identification analysis results:

The quality analysis expert group discussed and comprehensively analyzed the relevant information of the "biological filter tower", the contract technical agreement, on-site investigation case materials and other data, and made the following quality analysis opinions: HTMLTAGT The packing specific surface area of the biological filter tower involved in OKEN5

is only 180m²/m³ (agreement ≥300m²/m³), uneven air distribution causes the local air flow rate to exceed the protocol value by 50%; the thickness of the microbial film is 30μm (agreement ≥50μm), and the ATP activity is only 5×10⁻⁹mol/cm³ (agreement ≥1×10⁻⁸mol/cm³).

The appraisal conclusion determined that defects in filler performance and bacterial activity were the main causes of treatment failure.

Biofilter quality appraisal report should include:

1, appraisal purpose (such as environmental penalty attribution, performance verification) and reference standards;

2, involved equipment model, process parameters, operation and maintenance records;

3, testing method and equipment list (such as gas phase Chromatograph, BET analyzer);

4, analysis of the correlation between test data and failure (such as the impact of filler specific surface area on removal rate);