Sewage plant dewatered sludge continuous rapid zero-emission resourceful treatment process

Abstract

The invention provides a sewage plant dewatered sludge continuous rapid zero-emission resourceful treatment process which comprises the following steps: transporting dewatered sludge by a stirring tank vehicle; adding biological strains and chemical additives; completely stirring and reacting in the transportation process so as to completely mix composite biological enzyme and the sludge, eliminate protozoa and filamentous bacteria in the sludge, break sludge zoogloea, organic matter particles and microbial cell walls and perform complexing on heavy metal ions; performing hydrolysis and sterilization treatment by a horizontal cylindrical reaction kettle; performing filter-pressing dehydration on the treated sludge to separate mud from water and finally obtaining protein-enriched nutrient soil and amino acid nutrient solution, wherein pathogenic bacteria are inactivated, heavy metal is stabilized, and macromolecular organic matter with high content can be directly prepared into or further processed into safe and high-efficiency solid or liquid organic fertilizer.

Description

technical field [0001] The invention relates to a resource-based treatment process for continuous, rapid and zero-discharge of dewatered sludge from a sewage plant, and belongs to the field of environmental protection solid waste treatment. Background technique [0002] The "Water Pollution Prevention and Control Action Plan" (Guo Fa [2015] No. 17) promulgated by the State Council in 2015 clearly puts forward the requirements for strengthening urban sewage treatment and sludge disposal: the existing urban sewage treatment facilities should be transformed according to local conditions, and reach the level by the end of 2020. Corresponding discharge standards or recycling requirements; in accordance with the requirements of the national new urbanization plan, by 2020, all counties and key towns across the country will have sewage collection and treatment capabilities, and the sewage treatment rates in counties and cities will reach about 85% and 95% respectively; sewage treatme...

AI Technical Summary

Problems solved by technology

[0003] Before the 21st century, most of the sludge produced by my country's urban sewage plants was directly disposed of by landfill and incineration after dehydration, which resulted in: (1) the huge volume of sludge, resulting in huge sludge disposal costs; (b) The sludge is extremely unstable, once the organic components in the sludge become corrupted, it will cause serious secondary pollution to the environment; (3) The useful resources in the sludge have not been utilized, resulting in a waste of resources, which is not in line with sustainable development The goal

However, the traditional sludge composting methods (aerobic, anaerobic, and two-phase digestion) have the disadvantages of occupying a large area, taking a long time, and incomplete harmlessness.