Methods, systems and devices for treating and remediating or abating carbon containing wastes to produce clean water, non-toxic, non-hazardous ash has been taught and described, the method, systems and devices are particularly suited to treating aqueous hydrocarbon containing waste streams generated in the oil and gas drilling and hydrofracking industry including electrocoagulating which removes flocculent, the flocculent is removed and then the aqueous stream is separated into light fractions and heavy fractions. The heavy fraction and flocculent are recombined and then gasified to produce syngas and ash, the syngas can then be used in generating power.