The invention discloses a zero-
sewage discharge novel process for development of
natural gas fields. The zero-
sewage discharge novel process comprises the following steps of: classifying
sewage in a gas field into normal production sewage, domestic sewage, overhauling sewage, accident waste liquid, rainwater, production
wastewater and gas field water, and collecting separately; next, guiding the normal production sewage, domestic sewage, overhauling sewage, accident waste liquid and initial rainwater to a biochemical
treatment unit, guiding the production
wastewater to an
electrodialysis treatment unit and guiding the gas field water to a gas field water pretreatment unit; guiding all of up-to-standard sewage which is treated by the biochemical
treatment unit previously and not completely recycled, concentrate generated after the treatment of the
electrodialysis treatment unit and the gas field water treated by the gas field water pretreatment unit to an evaporative
crystallization unit for advanced treatment; and after the quality of the water is up to the standard, recycling the water as make-up water for circulating cooling water or water for other production in the gas field, and separating out pollutants from the sewage in the form of crystalline salts, backfilling or recycling the crystalline salts, and finally, realizing zero
discharge of the sewage.