1, different definitions

Volume load: Volume load refers to the amount of pollutants that can be borne by the unit effective volume of the treatment device in unit time.

Organic load: Organic load refers to the amount of organic pollutants received by sewage treatment reactor (or medium filter material) per unit volume per unit time, generally excluding the organic matter in the reflux liquid of the reactor (when reflux system is adopted).

2. Different applications

Volume load: It is relatively simple and intuitive to use volume load to evaluate the actual treatment load of biochemical devices and the advantages and disadvantages of operation and management under the same conditions. In the coking system, it is especially true that the easy-to-detect COD volume load is used as the comprehensive evaluation index.

Organic load: Organic load is an important index reflecting the purification efficiency of DC biological aerated filter, and also a control index of nitrification efficiency of N biological aerated filter.

3. Expression differences

Volume load: the amount of organic pollutants (BOD5) that can be accepted and degraded to a predetermined degree per unit time (1 d) per unit aeration tank volume (m3), which is usually represented by the symbol Nv.

Organic load: can organic matter use BOD or COD? Therefore, it is also called BODs or COD load, and the unit is kg/(m3 day).

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