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Mass algal culture system

  • US 4,253,271 A
  • Filed: 12/28/1978
  • Issued: 03/03/1981
  • Est. Priority Date: 12/28/1978
  • Status: Expired due to Term
First Claim
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1. A gas lift pump mechanism for circulating a liquid medium containing an algal culture and for facilitating the separation of suspended substances from said liquid medium comprising:

  • a substantially vertical stand pipe having a liquid medium inlet and a medium outlet located above said inlet;

    first gas inlet means for introducing a sufficient volume of gas into liquid medium inside said pipe to cause said medium to rise therein; and

    second gas inlet means, separate from said first gas inlet means, for introducing a stream of minute gas bubbles into said liquid medium inside said pipe which bubbles adhere to suspended substances in said liquid medium and increase the buoyancy of said substances.

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