System and method for treating waste water and sewage containing sulfate radicals

Abstract

The invention discloses a system and a method for treating waste water and sewage containing sulfate radicals. The system comprises an anaerobic chamber, an anoxic biofilter and an aerobic biofilter, wherein the anaerobic chamber is provided with an up flow type anaerobic sludge bed used for reducing sulfates into sulfides, and the anaerobic chamber is communicated with the anoxic biofilter so as to make the sulfides flow in the anoxic biofilter, and the anoxic biofilter is used for the autotrophic denitrification reaction; the sulfides formed in the anaerobic chamber denitrifies the nitrates; and the anoxic biofilter is communicated with the aerobic biofilter used for nitratlon reaction, the aerobic biofilter is provided with a clarification zone on the upper part, the filtered water flows to the clarification zone, the bottom part of the clarification zone of the aerobic biofilter is communicated with the anoxic biofilter so as to reflux the water on the bottom part of the clarification zone to the anoxic biofilter for denitrification, and the clean water is discharged from the top part of the clarification zone. When the system and the method for treating the salt containing sewage utilize the up flow type anaerobic sludge bed to effectively remove organic substances in the sewage and remove nitrogen by the autotrophic nitrification and denitrification, no residual sludge is generated; and the equipment for heating or generating ultrasonic wave is not necessary, and the cost is reduced.

Description

technical field [0001] The invention relates to a water treatment process, in particular to a sulfate radical-containing waste and sewage treatment system and a treatment method thereof. Background technique [0002] At present, with the continuous consumption of people's living water, fresh water resources are becoming more and more scarce, so some places or regions with relatively insufficient fresh water resources turn to seawater or salt water to make up for the shortage of fresh water resources. Especially some coastal islands and cities, where the economy is developing rapidly, but the supply of fresh water resources has been in a state of tension, so it is necessary to make full use of coastal seawater resources in these places. [0003] The current utilization of water resources, such as flushing toilets with seawater, secondary treatment of water through micro-membrane filtration combined with reverse osmosis (referred to as RO) filtration for reuse, or through memb...

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Problems solved by technology

However, these methods all have higher costs and additional land will be occupied for sludge treatment, which cannot fundamentally solve the problem of sludge accumulation.

[0006] In addition to the above-mentioned saline wastewater produced by seawater flushing, the treatment of other saline wastewater such as landfill leachate and high-salt oil extraction wastewater is difficult to be effective using traditional biological processes, which is a major problem that needs to be solved urgently

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