Preparation method of landfill leachate carbon source

Abstract

The invention discloses a preparation method of a landfill leachate carbon source, which is characterized by comprising the following steps: (1) collecting kitchen waste with rich carbohydrate contentand low ammonia nitrogen content; (2) crushing the kitchen waste until the particle size is 0-100mm; (3) adding tap water into the crushed kitchen waste until the kitchen waste is just immersed in the tap water; (4) adding distiller's yeast mould, and carrying out sealed fermentation on the kitchen waste, wherein the adding amount of the distiller's yeast mould is one ten thousandth to one hundredth of the weight of the kitchen waste; and (5) extracting liquid of the fermented kitchen waste, and carrying out purification treatment to obtain fermentation liquor which is a landfill leachate carbon source. A cheap carbon source is prepared from kitchen waste, a fermentation product prepared by introducing distiller's yeast mould is an alcohol solution, and macromolecular COD is degraded intomicromolecular BOD which is easily utilized by water treatment microorganisms, so that the methanol adding cost is greatly saved, and the operation cost is saved.

Description

technical field [0001] The invention relates to the technical field of solid waste treatment, in particular to a method for preparing a landfill leachate carbon source. Background technique [0002] Due to the incomplete diversion of domestic rain and sewage, the concentration of organic matter in domestic waste leachate plants is generally low. In the process of upgrading and upgrading municipal landfill leachate plants, due to the insufficient concentration of organic matter, it is difficult to meet the problem of total nitrogen. Municipal landfill leachate plants often add methanol in the denitrification stage to make up for the lack of carbon sources in order to promote the total nitrogen to reach the standard. Due to the large amount of water treated by the sewage plant and the high price of methanol, the operating cost of the sewage plant is high. Therefore, it is necessary to find alternatives to cheap carbon sources, thereby greatly reducing operating costs. [000...

AI Technical Summary

Problems solved by technology

In the existing old landfill, the concentration of ammonia nitrogen in the landfill leachate is as high as 2000-5000mg / L, and the concentration of biodegradable organic matter is low, resulting in an imbalance of C / N ratio. The conventional nitrification and denitrification process needs to add a lot of carbon The cost of adding carbon source (methanol) to some waste landfills is nearly 10 million yuan per year, increasing operating costs