Composite carbon source additive and preparation method thereof

Abstract

The invention relates to the technical field of sewage treatment, in particular to a novel composite carbon source additive and a preparation method thereof. The additive comprises the following components in percentage by weight: 8%-20% of 1, 2-ethylidene glycol (ethylene glycol), 8%-30% of methyl glycol, 8%-30% of sodium acetate, 8%-25% of propylene glycol methyl ether acetate, 8%-25% of protein high peptide and amino acid and the balance of water. The novel composite carbon source additive disclosed by the invention can provide nutrients required by microorganisms, realize high-efficiency denitrification of wastewater and enhance the metabolic activity of bacteria, so that the speed of synthesizing a new cell substance and the utilization rate of a carbon source matrix are increased, the biological denitrification efficiency is further improved, and the requirements of the market on a high-quality and high-efficiency water treatment carbon source are met.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a novel composite carbon source additive and a preparation method thereof. Background technique [0002] Due to the continuous acceleration of urbanization, the discharge of domestic sewage and eutrophication substances have increased, resulting in increasingly serious eutrophication of lakes and reservoirs. At present, relevant departments have required sewage treatment plants to first use biological nitrogen and phosphorus removal before discharging sewage into receiving water bodies to prevent environmental pollution. The current sewage treatment plants in my country generally have the problem of reduced denitrification efficiency caused by insufficient carbon sources for denitrification. In order to solve this problem, on the one hand, the area of ​​the denitrification anoxic zone can be increased, and the denitrification time can be extended to increase the denitri...

AI Technical Summary

Problems solved by technology

When methanol is used as a carbon source, the cost is relatively high, the response time is slow, and it has certain toxic effects. When it is used for emergency dosing in sewage plants, the effect is not good; the denitrification rate of ethanol is not as good as methanol and sodium acetate; glucose is used as an external carbon source. The treatment effect is good, but as a multi-molecular compound, it is easy to cause a large number of bacteria to multiply, leading to sludge bulking, increasing COD of effluent, and affecting the quality of effluent water. Compared with alcohol carbon sources, glucose is more likely to produce nitrous state The phenomenon of nitrogen accumulation, so it is not recommended to use a large amount of glucose as an external carbon source; the advantage of sodium acetate is that it can respond to the denitrification process immediately, and can be used for emergency treatment during water plant operation, because it is a small molecule organic acid , denitrifying bacteria are easy to use, and the denitrification effect is the best, but due to the high price and high sludge yield, and the sludge disposal problem in sewage plants is also a big problem, so sodium acetate is used in sewage Large-scale dosing of the plant is almost impossible

There are many types of microbial groups in wastewater denitrification treatment, and supplementing a single carbon source cannot meet all the nutritional needs of microorganisms at the same time; although composite carbon sources also appear, the denitrification effect is not much improved compared with that of single carbon source additives. a lot of room for improvement

In addition, multiple sets of feeding equipment are required in the existing technology, which increases the cost of operation and maintenance

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