The biological oxygen demand

The biological oxygen demand (BOD) in aqueous streams for both butanals is 1.62 wt/wt for five days (42). The NFPA Hazard classification (42) ... 

More stringent limits are imposed upon discharges to natural waters as exemplified in Table 16.16. In both cases the BOD, the biological oxygen demand, represents the demand for oxygen in order to decompose the organics in the effluent. 

Activated sludge processes are frequently used to reduce the biological oxygen demand of an aqueous effluent before discharge. 

The design of a waste treatment system requires data that was not available to me. A secondary system to reduce the biological oxygen demand and a tertiary system to at least remove most of the phosphates are required. Whether styrene is biodegradable was not known. If it is not, then the tertiary system will have to be designed to remove it also. 

High content of organic matter, which contributes to the biological oxygen demand (BOD) and depletion of dissolved oxygen in the receiving ecosystems. 

The increase in microbe populations that can be caused by direct application of surfactants leads to an increased need for oxygen (an increase in the biological oxygen demand, or BOD). This increased demand for oxygen was handled in a laboratory-scale experiment where the soil was easily mixed each day for aeration however, it was implied that oxygen could act as a limiting factor in a full-scale apphcation where aeration would be more difficult. 

The biological oxygen demand (BOD) in aqueous streams for both butanals is 1.62 wt/wt for five days (42). The NFPA Hazard classification (42) for both aldehydes are health (blue) 2 flammability (red) 3 and reactivity (yellow) 0. The flammability characteristics of the butanals are given in Table 7. The flash points for the butanals are well below room temperature. Thus, precautions must be taken to avoid heat, sparks, or open flame. ... 

As is common with any industry environmental concerns have led to intense activity in the development of green inhibitors. The biological oxygen demand (BOD) is the time duration over which the inhibitor persists in the environment. Inhibitors should be nontoxic and the BOD is at least 60%. Toxicity is expressed as LC50 which is the concentration of the inhibitor needed to kill 50% of the test species. Some typical data are given in Table 1.26. 

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