Method for preparing film type biological adsorbing medium

Abstract

The invention relates to a method for preparing a film type biological adsorbing medium, which belongs to the field of biological adsorbents and can be applied to the removal and recycling of heavy metal ions. A waste biological organic matter which is directly adopted as a water treatment agent has small mechanical strength and the adsorption capacity of 40mg / g at most and is easy for breakage. The film type biological adsorbing medium is prepared in such a way that a film is used as a carrier for embedding the granular waste organic matter and is desorbed by the dilute acid of 0.02-1M afterbeing adsorbed; and the biological adsorbing medium is regenerated and recycled by the dilute alkali of 0.005-1M after being adsorbed. The invention has low cost, the adsorption capacity of 40-200mg / g and no obvious reduction by using for more than 100 times and can not generate secondary pollution.

Description

Technical field The invention relates to a preparation method of a membrane type biological adsorption medium, belonging to the field of biological adsorbents. The core materials are waste biological organic matter and agricultural by-products produced by fermentation. The adsorbent can be applied to the removal of heavy metal ions and the recovery of precious metals. Background technique Industries such as electroplating, dyes, tanning, and metallurgy discharge a large amount of industrial waste water containing a variety of heavy metal ions every year. These waste water cause serious harm to humans and the surrounding ecological environment. Environmental pollution caused by waste water is getting more and more attention. At present, there are chemical treatment methods, ion exchange methods, adsorption separation methods, membrane separation methods and microbiological methods for the treatment of this type of wastewater containing multiple heavy metal ions. These methods a...

AI Technical Summary

Problems solved by technology

However, due to the insufficient batches of repeated use, it cannot meet its requirements in wastewater treatment, which limits the application of bacteria as a water treatment agent in industrial wastewater treatment.