Hello everyone! Welcome to pay attention to Xiaolu water treatment. With the country's emphasis on environmental issues, sewage discharge standards have become more and more stringent, especially in recent years, the total nitrogen discharge requirements and supervision have become more stringent. Therefore, the demand for carbon sources in sewage plants began to gradually appear. By adding carbon sources to promote the total nitrogen standard, it has become one of the important means for sewage plants to meet the standards of effluent. So what is the difference between the common carbon-derived methanol, sodium acetate, and glucose, and how should we choose?
methanol
First of all, methanol is a flammable and explosive dangerous substance. Enterprises must obtain relevant qualifications to use methanol, and need to use explosion-proof equipment, and the basic investment is high. However, methanol has the advantages of lower cost and less sludge production from the perspective of long-term addition. In addition, the effect of methanol as a carbon source to remove total nitrogen is slower, and it generally needs to be continuously added for about a month to produce an effect, and cannot be used for emergency adjustment of total nitrogen indicators. In summary, methanol is more suitable for large-scale applications, long-term total nitrogen exceeding the standard, and long-term carbon source applications.
glucose
The cost of glucose as a carbon source is higher than that of methanol, and the effect is not much different from methanol, and the same mud production is small, but the transportation and storage are relatively simple. The ideal carbon-nitrogen ratio of glucose is 6.4-7.5, which is much larger than methanol, and glucose cannot be used by microorganisms, and it takes about 20 days of sludge domestication to reduce total nitrogen. Glucose is more prone to nitrosinous nitrogen accumulation than methanol, and it is generally not recommended to use glucose as a carbon source in large quantities.
Sodium acetate
Sodium acetate (also known as sodium acetate) is relatively easy to be biologically absorbed, and after addition, it can produce a reduced total nitrogen effect in a short period of time, and generally has obvious effects on the same day or the next day, which is the biggest advantage of sodium acetate as a carbon source. However, the disadvantages of sodium acetate are also obvious, that is, the sludge production is very high, due to the general sludge disposal difficulties in sewage plants, the problem of high disposal costs, and the price of sodium acetate is relatively high, so it is difficult to promote the use of sodium acetate on a large scale, but sodium acetate as an emergency treatment carbon source with excessive water quality Is very obvious, so it is generally possible to store some sodium acetate as an emergency carbon source.