Environment-friendly sludge dewatering conditioner and application thereof

Abstract

The invention relates to an environment-friendly sludge dewatering conditioner and an application thereof. The environment-friendly sludge dewatering conditioner comprises the following components in parts by weight: 0.4-1.2 parts of chitosan, 1-5 parts of trivalent ferric salt, 1-12 parts of modified attapulgite and 0.025-0.1 part of surfactant. The environment-friendly sludge dewatering conditioner is used for sludge dewatering. An application method of the environment-friendly sludge dewatering conditioner comprises the following steps: adding the surfactant accounting for 0.025%-0.1% of the dry weight of the sludge to be treated to the sludge to be treated under the conditions of ordinary temperature and pressure, and rapidly stirring for at least three minutes; afterwards, adding the modified attapulgite powder accounting for 1%-12% of the dry weight of the sludge to be treated and the trivalent ferric salt accounting for 1%-5% of the dry weight of the sludge to be treated, and rapidly stirring for at least three minutes; adding the chitosan accounting for 0.4%-1.2% of the dry weight of the sludge to be treated, and rapidly stirring for at least three minutes at a low speed; carrying out filter pressing on the conditioned sludge. Compared with the prior art, the environment-friendly sludge dewatering conditioner is low in cost and little in dosage, so that the sludge dewatering cost can be effectively reduced. The conditioned sludge is small in dewatering pressure and low in operation energy consumption and cost.

Description

technical field [0001] The invention relates to a sludge dehydration conditioner and its application, in particular to an environment-friendly sludge dehydration conditioner and its application. Background technique [0002] With the rapid economic and social development and the continuous improvement of the quality of life, the discharge of industrial wastewater and domestic sewage is increasing. As a widely used and mature technology in urban sewage treatment, activated sludge process has the advantages of high treatment efficiency and low operating cost, but it also produces a large amount of excess sludge. Surplus sludge is a major challenge for sewage biotechnology, one of the important reasons is the high cost of sludge treatment and disposal. Experience shows that the cost of sludge treatment and disposal accounts for 50% of the operating cost of the entire sewage treatment plant, sometimes even as high as 60%. [0003] The composition of sludge is complex, containi...

AI Technical Summary

Problems solved by technology

[0004] Among them, a suitable and efficient flocculant is the core of this technology. Among the commonly used flocculants, the dosage of inorganic flocculants is relatively large, the treatment effect is not ideal, and the residual metals in the final product will cause harm to the environment; and Organic synthetic polymer flocculants are generally biodegradable substances, and the toxicity of residual monomers will cause secondary pollution to the environment

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