36results about How to "Increase nitrification rate" patented technology

The present invention discloses a real-time control apparatus for a floated aerobic biofilm A<2>O system for treating low C / N sewage, and a method thereof. The real-time control apparatus for the floated aerobic biofilm A<2>O system comprises a raw water tank (1), an aerobic biofilm A<2>O reactor (2), a secondary settling tank (3), a DO meter (5), a on-line tester (6), a computer (7) and a process controller (8). The real-time control method comprises: online collecting ammonia nitrogen concentration in a effluent tank, wherein the real-time control system is adopted to adjust the aeration rate of an air pump; online collecting nitrate nitrogen concentration in the effluent tank, wherein the real-time control system is adopted to adjust the reflux ratio of the nitrified liquid of a peristaltic pump; online collecting the PO4<3->-P concentration in the effluent tank, wherein the real-time control system is adopted to adjust a bypass flow ratio of the peristaltic pump; online collecting the TOC concentration in the effluent tank, wherein the real-time control system is adopted to adjust the aeration rate of the air pump. The method provided by the present invention is one of the most effective methods for treating the low C / N sewage and synchronously denitriding and removing phosphorus. The effluent quality through the apparatus and the method provided by the present invention stably achieve the national one-level (A) standard.

The invention belongs to the field of microbial fermentation, and in particular relates to a high-density enrichment method of an autotrophic nitrifying bacteria consortium and the application of the obtained high-density autotrophic nitrifying bacteria consortium to sewage treatment. The bacteria were inoculated in the initial culture medium of autotrophic nitrifying bacteria, at 28°C-32°C, pH 7.5-8.0, dissolved oxygen (DO) controlled at 20%-40%, cultured under agitation conditions, the NO 3 The relationship between ‑N accumulation and the consumption of inorganic carbon sources, the change of pH value during the cultivation process is monitored by pH electrodes, and the addition of inorganic nitrogen sources and inorganic carbon sources to the cultivation system is realized, so that the concentration of ammonia nitrogen is controlled at 150‑ during the cultivation process 300mg / L, and the pH of the system is kept at 7.5-8.0 by adding carbon sources, so as to realize the high-density automatic expansion of autotrophic nitrifying bacteria consortia. The invention effectively solves the problem of poor ammonia nitrogen treatment effect caused by such consortia in the application process of ammonia nitrogen wastewater treatment due to poor strain adaptability, loss of added strains, insufficient number of added strains and high cost.