31results about How to "Guaranteed biomass" patented technology

The invention belongs to the technical field of environmental engineering sewage treatment, and in particular relates to an integral air-lift circumfluent suspended filler dispersed sewage biological treatment device. The device integrates four functional units, which respectively are an anoxia biological regulation tank, a suspended filler biological reaction tank, a secondary sedimentation tankand a mud storage tank. The round vertical flow type secondary sedimentation tank is arranged at the middle part of a reactor, other three functional units are located around the central secondary sedimentation tank in radiating way, and the appearance of the entire device is in cylindrical structure. Rural dispersed domestic sewage enters into the anoxia biological regulation tank uniformly through a pipeline, is subject to hydrolyzation and acidification, lifted into the suspended filler biological reaction tank by a sewage air-lifter, spherical suspended filler with filling ratio of 40-50%is thrown in the suspended filler biological reaction tank, enters into the central secondary sedimentation tank through a barrier mesh at the drain hole, sediment water and mud are separated, mud iscollected by a triangular-notch weir and water is discharged via a water collecting sump. Nitrification liquid in the suspended filler biological reaction tank reflows into the anoxia biological regulation tank via a nitrification liquid air-lifter for denitrification by utilizing influent organic carbon source. Sediment mud in the secondary sedimentation tank enters into the mud storage tank viaa mud air-lifter, and the mud drainage period is long. The invention utilizes the anoxia biological regulation tank to achieve functions of removing organic substances and denitrifying; the compact integral structure occupies a small area of land; system equipments are few, thus investment and running cost are little; the invention is suitable for rural dispersed domestic sewage treatment.

A phenol inhibition-coupled low temperature short-cut denitrification method belongs to the field of sewage treatment. The pre-denitrification operation mode of a sequencing batch reactor (SBR) is adopted, raw water and phenol compound are sufficiently utilized as carbon source, and additional carbon source is not added. When the temperature is linearly decreased to 15 DEG C from 25 DEG C and thephenol concentration is 0mg / L to 30mg / L, the system does not discharge sludge; when the phenol concentration is 60mg / L, the sludge concentration is kept at 4000mg / L; and when the phenol concentrationis 90mg / L, the sludge concentration is kept at 5000mg / L. The increase of the nitrite accumulation rate under low-concentration phenol is slow, and the nitrite accumulation rate is less than 5 percentwhen the phenol concentration is 0mg / L, reaches 22 percent at the final stage when the phenol concentration is 30mg / L, and is 43 percent at the final stage when the phenol concentration is 60mg / L; the affection of high-concentration phenol on the composition of system sludge is great, and the nitrite accumulation rate reaches 91 percent and is stably kept at more than 90 percent at the final stage. The method is applicable to industrial wastewater treatment in cold northern regions and can be adopted as a technical reference for the inhibition of the toxicity of phenolic compounds in urban sewage.