Utilization method of marigold flower wastewater

Abstract

The invention discloses a utilization method of marigold flower wastewater. The utilization method of the marigold flower wastewater includes the steps that (1), the marigold wastewater is taken, andKOH is added to the marigold wastewater; (2), a mixed solution of the marigold wastewater and the KOH is put into a fermentation tank, and a catalyst is put into the fermentation tank; (3) organic carbon liquid is added and standing is carried out; (4), one or more of glucose, urea, KH2PO4, MgSO4.7H2O, CaCl2, NaHCO3 of 42.35mg / l, peat or lignite or fly ash or straw ash, urea, potassium dihydrogensulfate, decomposition bacteria and ammonia bicarbonate; and (5), a supernatant in a sedimentation tank is taken out, and organic calcium fertilizer and rooting water are added into the supernatant. According to the utilization method of the marigold flower wastewater, the utilization of waste resources is realized, and the effect of turning waste into treasure is achieved, that is, the problem ofenvironmental pollution caused by the wastewater is solved, and the trouble of wastewater treatment in enterprises is reduced; and in a dry land crop planting area, it is still in a dry season when sowing or planting are carried out, and lack of water is common, and by using the organic liquid fertilizer as the rooting water, the organic liquid fertilizer can be used as base fertilizer, and the problem of water is solved.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a method for utilizing waste water from marigold flowers. Background technique [0002] Marigold flowers are raw materials for extracting natural lutein. With the increasing demand for natural lutein at home and abroad, the scale of planting, production and processing of marigold is gradually expanding. However, during the process of fermenting marigold flowers to extract lutein, a large amount of waste liquid will be discharged, which seriously restricts the development of this industry. This waste liquid is acidic, with a ph value generally between 4.0 and 5.5. It also contains a large amount of organic substances, and its composition is relatively complex. Direct discharge will pollute the environment and even lead to the death of crops. If the traditional sewage treatment method is used to treat the waste liquid and discharge it, on the one hand, a large amount of organic nut...

AI Technical Summary

Problems solved by technology

In the production process of this nutrient solution, it is necessary to mix various components such as waste liquid, decomposing bacteria, and lye for fermentation. During the fermentation process, parameters such as oxygen and temperature control are required. Traditional concentrated fermentation is difficult. Precise control; the waste water generated during the entire collection, storage and processing of marigolds is about one-third of the weight of the flowers, and about 3.3 tons of flowers produce 1 ton of waste water

With the increase of the planting area of ​​marigolds, processing plants and purchasing sites face the problem of wastewater treatment from flower fermentation, which is becoming increasingly prominent; the wastewater generated from marigold flower silage is rich in organic matter, and the chemical oxygen demand (COD) is 40000-50000mg / L, biological oxygen consumption (BOD) is about 20000mg / L, and the pH value is between 3.8-4.5; the pH value of wastewater is low and acidic, and the COD and BOD are high. Direct discharge without treatment can cause soil pollution and water pollution Pollution, causing harm to crops, cannot be discharged directly, and also contains high potassium and phosphorus