const obj = {
  matrimonyUrl: 'christian-grooms',
  search_criteria:
    'a:2:{s:6:"gender";s:4:"Male";s:9:"community";s:9:"Christian";}',
  mothertongue: null,
  religion: 'Christian',
  caste: '',
  country: null
};

const result = R.reject(R.equals(''))(obj);

console.log(result);

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