화학적 처리에 의한 1차 하수처리장의 처리효과 개선 -현장시험을 중심으로-

Chemically Enhanced Primary Treatment at D Wastewater Treatment Plant

  • 곽종운 (경기화학공업(주) 수처리연구실) ;
  • 김승현 (경남대학교 토목공학과) ;
  • 이찬원 (경남대학교 환경보호학과)
  • 발행 : 1997.01.15

초록

This study examined the feasbility of upgrading D waste water treatment plant which treats incoming wastewater by primary sedimentation only. By adding 20-40 ppm of Hi-PAX into the outlet of the aerated grit chamber, BOD and SS removal efficiences were improved from 29% and 36% to 53 % and 73%,respectively. However, chemically enhanced primary treatment failed to meet the upcoming wastewater quality standard(BOD and SS <20 mg/l) consistently. This was suspected to result from the deteriorated plant return stream. The wastewater treatment by chemical treatment should have increased the amount of the sludge to be removed as the sludge production was increased. Chemically enhanced primary treatment is anticipated to consistently produce effluent of the 1996 standards quality by adjusting the amount of the sludge to be removed. Besides BOD and SS removal, chemically enhanced primary treatment resulted in the improved T-P removal from 30% to 64-74%. However, such benefit was not observed in T-N removal. Improved T-P removal will be expected to help control water pollution in Masan bay.

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