Biogas utilization system for recycling ship kitchen waste and domestic sewage

Abstract

The invention belongs to the technical field of ship sewage recycling and biogas utilization pretreatment, and particularly relates to a biogas utilization system for recycling ship kitchen waste anddomestic sewage. The system comprises a pretreatment unit, a biogas generation unit, a biogas purification unit, a biological treatment unit, a photoelectrocatalytic reaction unit and a sludge treatment unit. Domestic sewage and kitchen waste generated by sailors in the ship sailing process are treated and then mixed together to enter the biogas generation unit to generate biogas; the produced biogas is purified and provided for gas equipment, fermented mixed liquid is introduced into the biological treatment unit to be treated and then enters a clean water tank; effluent of the clean water tank enters the photoelectrocatalytic reaction unit to remove organic pollutants and bacteria in the water and then is filtered out through a membrane assembly so that the water quality reaches the shipreuse standard. The purified biogas maintains certain humidity, purity, temperature and pressure, is more stable and safer to use, and greatly enhances the utilization ratio of the biogas.

Description

technical field [0001] The invention belongs to the technical field of ship sewage recycling and biogas utilization pretreatment, and specifically relates to a biogas utilization system for ship kitchen waste and domestic sewage recycling and treatment. Background technique [0002] With the increase of transportation costs, the shipping industry occupies an increasing proportion in international commercial transportation. According to statistics, 90% to 95% of goods are transported by ships. The vigorous development of the shipping industry has also brought huge challenges to the ecological environment of marine water bodies. The pollution of offshore waters has become more and more serious, posing a threat to human health, and people's awareness of ecological environment protection is also increasing. The problem of sewage discharge from ships has gradually come into people's sight. The United Nations Maritime Organization (International Maritime Organization-IMO) has con...

AI Technical Summary

Problems solved by technology

The integrated membrane bioreactor in the biological method is widely used in the treatment of ship sewage. Although it has the advantage of a small footprint, it also has problems such as poor removal of phosphorus-containing pollutants and prone to membrane fouling.

At the same time, in the existing technology, there are still problems in the treatment of ship sewage, which are affected by the ship's swaying and tilting, poor solid-liquid separation effect, and no sewage reuse treatment device.

The traditional treatment method usually discharges the sewage directly after reaching the discharge standard through the purification device, which causes waste to a certain extent.

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