Artificial wetland composite matrix for nitrogen and phosphorus removal of rural sewage and preparation method thereof

Abstract

The invention relates to an artificial wetland composite matrix for nitrogen and phosphorus removal of rural sewage and a preparation method thereof. The artificial wetland composite matrix comprises the following components in percentages by weight: 50% of coarse sand, 30% of gravel, 4% of wood dust, 10% of titanium-making waste slag, 3% of steel-making blast furnace slag and 3% of steel slag. The preparation method of the artificial wetland composite matrix comprises the following steps: airing required raw materials of the artificial wetland composite matrix to dryness; crushing the titanium-making waste slag through a 2cm sieve screen, and uniformly mixing the coarse sand, the gravel, the wood dust, the steel-making blast furnace slag and the steel slag in percentage by weight so as to prepare the artificial wetland composite matrix. The artificial wetland composite matrix for nitrogen and phosphorus removal of rural sewage and the preparation method of the artificial wetland composite matrix have the following advantages that (1) the technology is simple and easy to carry out; (2) the raw materials are sufficient, low in cost and easily obtained from the market; (3) the formula of the raw materials is reasonable, and each raw material is particularly effective; (4) the formula of the raw materials is innocuous and unpoisonous without causing secondary environmental pollution.

Description

technical field [0001] The invention relates to a constructed wetland composite substrate and a preparation method thereof, in particular to a constructed wetland composite substrate for denitrification and phosphorus removal of rural sewage and a preparation method thereof. Background technique [0002] Rural sewage includes two aspects of production sewage and domestic sewage. It is characterized by the fact that it basically does not contain heavy metals and toxic and harmful substances, contains a certain amount of nitrogen and phosphorus, and has good biodegradability. However, the water quality and quantity vary greatly, and centralized collection and treatment of sewage is difficult. . In view of the shortage of funds and energy in rural areas in China, adopting practical technologies with low one-time investment, low energy consumption, stable operation, low operating costs, and convenient maintenance and management is the main way to solve the problem of rural sewag...

AI Technical Summary

Problems solved by technology

[0004] At present, due to the wide variety of pollution types and pollution loads in sewage, existing products cannot effectively remove nutrients such as nitrogen and phosphorus in rural sewage. A kind of constructed wetland composite substrate for denitrification and phosphorus removal of rural sewage with obvious effect and using waste residue as active substrate and its preparation method

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