Experimental Study on CRI Technology in the Degradation of COD in Wastewater Reuse

Pengshuai Qiao

doi:10.2174/1876973x01407010135

Abstract

With the improvement of the urbanization level, the mixed city water has surged and the traditional denitrogenating cost in the course of wastewater reuse has been unbearable. This experiment used the technology of the constructed rapid infiltration (CRI) and applied the soil column simulation method in the laboratory. The results show that nitrogen removal rates of two soil columns are 73.73% - 75.54%, 66.70% - 77.81% and 79.33% - 73.08% under three wet/ dry (3 h/9 h, 6h/18 h, 8 h/40 h) ratios conditions, individually. The same soil column with the same wet/ dry ratio has a higher ammonia nitrogen removal rate within a shorter operation time. The comparison result of experiments show that the artificial soil mixture ratio in column 2 is better than that of column 1, arriving at the optimum operation conditions of the system.

Highlights

With the increased demand for our food, food productionR has become increasingly dependent on irrigation
Wastewater is recycled as a resource, promoting the benign water resource circulation between natural and social
As can be seen from Figs. (2-7), during the initial operation of the constructed rapid infiltration (CRI) system, since the microorganisms have not fully matured, the degradation of COD in wastewater is mainly made by physical and chemical interception and adsorption of the artificial soil, which appeared the convergence of changes between influent and effluent COD concentrations

Summary

INTRODUCTION

R has become increasingly dependent on irrigation. A increasingly restricting the development of agricultural production; on the other hand, a large number of phosphorus, nitrogen and organic pollutants in urban sewage discharge. The land irrigation and sewage land treatment technology are organically combined. It could take full advantage of the. E wastewater land treatment technology and overcome the drawbacks of traditional wastewater irrigation, reducing. T pollution, treating the sewage, saving water resources, and ensuring the production and quality of crops. Wastewater is recycled as a resource, promoting the benign water resource circulation between natural and social. R agricultural irrigation and made some achievements. E(CRI) indoor simulation test system for urban sewage treatment, which can reach the general crop irrigation water.

Test Materials and Equipment

E Water distribution tank

CONCLUSION