The large water treatment field is controlled by automatic controlling network system which consists of 4 sets of PLC and network device and software.

The pollution of malodor had become a serious nuisance in the refinery's sewage disposal field; this paper interpreted the producing, characteristic and harm of the source of malodor in the sewage disposal field; the treatment technique of malodor had been summarized and the application of biological technique on deodorization in the sewage disposal field had been discussed specially.

The pollution of malodor had become a serious nuisance in the refinery's sewage disposal field;this paper interpreted the producing and harm of the source of malodor in the sewage disposal field;the treatment technique of malodor had been summarized and the application of biological technique on deodorization in the sewage disposal field had been discussed specially.

Comment of the Retrofit for No.2 Wastewater Treatment Plant in the Refinery of Jinling Petro-chemical Croporation;

Through the simulation of current water quality in Jiaozhou Bay, the prediction of the water quality in two cases was made: during the wastewater treatment plant of Jiaozhou in normal conditions and accidents.

The paper describes the process flow of the wastewater treatment plant with 500t/h of capacity in Shengli Petrochemical General Works; summarizes the problems of operation since startup, the taken measures and the achieved results;puts forward a few suggestions for the improvement of the plant operation.