Management of Toxics for the Fukashiba Industrial Wastewater Treatment Plant of the Kashima Petrochemical Complex

1992 ◽  
Vol 25 (3) ◽  
pp. 247-254 ◽  
Author(s):  
T. Kozawa ◽  
T. Wueki ◽  
H. Kobayashi ◽  
S. Matsui
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Industrial Wastewater ◽  
Sewage Treatment ◽  
Treatment Plant ◽  
High Concentration ◽  
Industrial Wastewater Treatment ◽  
The Public ◽  
Petrochemical Complex ◽  
Slaked Lime

The Kashima petrochemical complex and its Fukashiba industrial wastewater treatment plant are described. When the factories of the complex discharge the wastewater, they must be in compliance with the standards designated in the Sewage Law of Japan, because they are users of the public sewage system. Ten of 81 factories discharged the wastewater containing identified toxics, and they treated corresponding toxic items before discharging to sewers. The wastewater of the factories was constantly monitored by the office of Kashima sewage works, and there had been few troubles with the operation of Fukashiba treatment plant. However, sludge contained cadmium at relatively high concentration in Fukashiba treatment plant, compared with sludge of the domestic sewage treatment plants. The sources of Cd were possibly the use of large amount of slaked lime in these factories. Prior to the construction of any new manufacturing plant, the office of Kashima sewage works practiced the test of biodegradability and toxicity of potential wastewater from the plant. The analytical method of GC/MS became a useful tool to confirm biodegradability and toxicity of substances in the wastewater from each plant.

Experience of 16 Years' Operation and Maintenance of the Fukashiba Industrial Wastewater Treatment Plant of the Kashima Petrochemical Complex – II. Biodegradability of 37 Organic Substances and 28 Process Wastewaters

1988 ◽  
Vol 20 (10) ◽  
pp. 201-210 ◽  
Author(s):  
S. Matsui ◽  
Y. Okawa ◽  
R. Ota
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Wastewater Treatment Plant ◽  
Industrial Wastewater ◽  
Treatment Plant ◽  
Organic Substances ◽  
Industrial Wastewater Treatment ◽  
Petrochemical Complex ◽  
Toc Removal ◽  
Nitro Aromatics

Twenty-eight process wastewaters and thirty-seven organic substances identified in the wastewater of the Kashima petrochemical complex were subjected to biodegradability tests. The tests consisted of the activated sludge degradability method and a supplementary test using the respiration meter method. Both tests utilized the activated sludge of the Fukashiba industrial wastewater treatment plant, which was acclimatized to the wastewater and organic substances. The 28 process wastewaters were classified into biodegradable, less biodegradable, and non-biodegradable according to the percentage TOC removal and the BOD5/TOC ratio of the wastewater. The 37 organic substances were also classified into biodegradable, less biodegradable and non-biodegradable according to TOC and CODMn removal. In general, chlorinated compounds, nitro-aromatics and polymerized compounds were difficult to biodegrade. From the biodegradability tests of the factory wastewaters, it was found that the refractory CODMn loads of these factories contributed to the load remaining in the effluent of the wastewater treatment plant. Various improvements were made to reduce the discharge of refractory substances from the factories.

Experience of 16 Years' Operation and Maintenance of the Fukashiba Industrial Wastewater Treatment Plant of the Kashima Petrochemical Complex – I. Operation and Maintenance

1988 ◽  
Vol 20 (10) ◽  
pp. 193-200 ◽  
Author(s):  
Y. Okawa ◽  
S. Shinozuka ◽  
R. Ota ◽  
S. Matsui
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Industrial Wastewater ◽  
Municipal Wastewater ◽  
Thermal Power ◽  
Treatment Plant ◽  
Industrial Wastewater Treatment ◽  
Operational Conditions ◽  
Petrochemical Complex ◽  
Operation And Maintenance

The Kashima petrochemical complex and the Fukashiba industrial wastewater treatment plant are described. The complex consists of 19 core factories (petroleum, petrochemicals, and thermal power generation) and 39 other factories (including organic chemicals, foods, metals, machinery, etc.). The total amount of industrial wastewater produced is 59,800 m3/day. The treatment plant also accepts municipal wastewater from the surrounding area, totalling 1,100 m3/d. A system for charging for the industrial wastewater has been introduced. The water quality standards for the industrial wastewater discharged to the sewerage system and the effluent of the treatment plant are described. The main treatment process is activated sludge with operational conditions of high dissolved oxygen and long solids retention time (SRT). These operational conditions solved the problems of high ammonia and refractory substances in the influent. Complete nitrification occurred under the low alkalinity conditions and the effluent COD was low due to the long SRT. Successful operation and maintenance were achieved by good co-operation between the factories and the treatment plant.

Control of bulking sludge caused by Type 021 N and Type 0961 in an industrial wastewater treatment plant with an aerobic selector

2002 ◽  
Vol 46 (1-2) ◽  
pp. 29-33 ◽  
Author(s):  
A. Duine ◽  
S. Kunst
Keyword(s):  
Fatty Acids ◽  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Pilot Plant ◽  
Industrial Wastewater ◽  
Volatile Fatty Acids ◽  
Treatment Plant ◽  
Filamentous Growth ◽  
Shock Loads ◽  
Industrial Wastewater Treatment

Over a period of 6 months, pilot plant investigations were carried out with the purpose of bulking sludge control with different aerobic selectors. The wastewater was dominated by industrial dischargers, containing volatile fatty acids up to 450 mg/l. With complete-mix-selectors it was not possible to achieve a stable SVI below 150 ml/g. The bulking sludge could only be controlled with a sectionalized selector (HRT 5–8 minutes per section). The SVI decreased to values below 100 ml/g. Shock-loads and increased VFA-concentrations (by dosing NaC2H3OO) did not cause filamentous growth.

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